[Intel-gfx] [PATCH 01/23] perf/core: Only copy-to-user after completely unlocking all locks, v3.

[Intel-gfx] [PATCH 01/23] perf/core: Only copy-to-user after completely unlocking all locks, v3.

[Maarten Lankhorst]

We inadvertently create a dependency on mmap_sem with a whole chain.

This breaks any user who wants to take a lock and call rcu_barrier(),
while also taking that lock inside mmap_sem:

<4> [604.892532] ======================================================
<4> [604.892534] WARNING: possible circular locking dependency detected
<4> [604.892536] 5.6.0-rc7-CI-Patchwork_17096+ #1 Tainted: G     U
<4> [604.892537] ------------------------------------------------------
<4> [604.892538] kms_frontbuffer/2595 is trying to acquire lock:
<4> [604.892540] ffffffff8264a558 (rcu_state.barrier_mutex){+.+.}, at: rcu_barrier+0x23/0x190
<4> [604.892547]
but task is already holding lock:
<4> [604.892547] ffff888484716050 (reservation_ww_class_mutex){+.+.}, at: i915_gem_object_pin_to_display_plane+0x89/0x270 [i915]
<4> [604.892592]
which lock already depends on the new lock.
<4> [604.892593]
the existing dependency chain (in reverse order) is:
<4> [604.892594]
-> #6 (reservation_ww_class_mutex){+.+.}:
<4> [604.892597]        __ww_mutex_lock.constprop.15+0xc3/0x1090
<4> [604.892598]        ww_mutex_lock+0x39/0x70
<4> [604.892600]        dma_resv_lockdep+0x10e/0x1f5
<4> [604.892602]        do_one_initcall+0x58/0x300
<4> [604.892604]        kernel_init_freeable+0x17b/0x1dc
<4> [604.892605]        kernel_init+0x5/0x100
<4> [604.892606]        ret_from_fork+0x24/0x50
<4> [604.892607]
-> #5 (reservation_ww_class_acquire){+.+.}:
<4> [604.892609]        dma_resv_lockdep+0xec/0x1f5
<4> [604.892610]        do_one_initcall+0x58/0x300
<4> [604.892610]        kernel_init_freeable+0x17b/0x1dc
<4> [604.892611]        kernel_init+0x5/0x100
<4> [604.892612]        ret_from_fork+0x24/0x50
<4> [604.892613]
-> #4 (&mm->mmap_sem#2){++++}:
<4> [604.892615]        __might_fault+0x63/0x90
<4> [604.892617]        _copy_to_user+0x1e/0x80
<4> [604.892619]        perf_read+0x200/0x2b0
<4> [604.892621]        vfs_read+0x96/0x160
<4> [604.892622]        ksys_read+0x9f/0xe0
<4> [604.892623]        do_syscall_64+0x4f/0x220
<4> [604.892624]        entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4> [604.892625]
-> #3 (&cpuctx_mutex){+.+.}:
<4> [604.892626]        __mutex_lock+0x9a/0x9c0
<4> [604.892627]        perf_event_init_cpu+0xa4/0x140
<4> [604.892629]        perf_event_init+0x19d/0x1cd
<4> [604.892630]        start_kernel+0x362/0x4e4
<4> [604.892631]        secondary_startup_64+0xa4/0xb0
<4> [604.892631]
-> #2 (pmus_lock){+.+.}:
<4> [604.892633]        __mutex_lock+0x9a/0x9c0
<4> [604.892633]        perf_event_init_cpu+0x6b/0x140
<4> [604.892635]        cpuhp_invoke_callback+0x9b/0x9d0
<4> [604.892636]        _cpu_up+0xa2/0x140
<4> [604.892637]        do_cpu_up+0x61/0xa0
<4> [604.892639]        smp_init+0x57/0x96
<4> [604.892639]        kernel_init_freeable+0x87/0x1dc
<4> [604.892640]        kernel_init+0x5/0x100
<4> [604.892642]        ret_from_fork+0x24/0x50
<4> [604.892642]
-> #1 (cpu_hotplug_lock.rw_sem){++++}:
<4> [604.892643]        cpus_read_lock+0x34/0xd0
<4> [604.892644]        rcu_barrier+0xaa/0x190
<4> [604.892645]        kernel_init+0x21/0x100
<4> [604.892647]        ret_from_fork+0x24/0x50
<4> [604.892647]
-> #0 (rcu_state.barrier_mutex){+.+.}:
<4> [604.892649]        __lock_acquire+0x1328/0x15d0
<4> [604.892650]        lock_acquire+0xa7/0x1c0
<4> [604.892651]        __mutex_lock+0x9a/0x9c0
<4> [604.892652]        rcu_barrier+0x23/0x190
<4> [604.892680]        i915_gem_object_unbind+0x29d/0x3f0 [i915]
<4> [604.892707]        i915_gem_object_pin_to_display_plane+0x141/0x270 [i915]
<4> [604.892737]        intel_pin_and_fence_fb_obj+0xec/0x1f0 [i915]
<4> [604.892767]        intel_plane_pin_fb+0x3f/0xd0 [i915]
<4> [604.892797]        intel_prepare_plane_fb+0x13b/0x5c0 [i915]
<4> [604.892798]        drm_atomic_helper_prepare_planes+0x85/0x110
<4> [604.892827]        intel_atomic_commit+0xda/0x390 [i915]
<4> [604.892828]        drm_atomic_helper_set_config+0x57/0xa0
<4> [604.892830]        drm_mode_setcrtc+0x1c4/0x720
<4> [604.892830]        drm_ioctl_kernel+0xb0/0xf0
<4> [604.892831]        drm_ioctl+0x2e1/0x390
<4> [604.892833]        ksys_ioctl+0x7b/0x90
<4> [604.892835]        __x64_sys_ioctl+0x11/0x20
<4> [604.892835]        do_syscall_64+0x4f/0x220
<4> [604.892836]        entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4> [604.892837]

Changes since v1:
- Use (*values)[n++] in perf_read_one().
Changes since v2:
- Centrally allocate values.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>

fixup perf patch

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 kernel/events/core.c | 45 +++++++++++++++++++++-----------------------
 1 file changed, 21 insertions(+), 24 deletions(-)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index 085d9263d595..4921b64a0abd 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -4926,20 +4926,16 @@ static int __perf_read_group_add(struct perf_event *leader,
 }
 
 static int perf_read_group(struct perf_event *event,
-				   u64 read_format, char __user *buf)
+				   u64 read_format, char __user *buf,
+				   u64 *values)
 {
 	struct perf_event *leader = event->group_leader, *child;
 	struct perf_event_context *ctx = leader->ctx;
 	int ret;
-	u64 *values;
 
 	lockdep_assert_held(&ctx->mutex);
 
-	values = kzalloc(event->read_size, GFP_KERNEL);
-	if (!values)
-		return -ENOMEM;
-
-	values[0] = 1 + leader->nr_siblings;
+	*values = 1 + leader->nr_siblings;
 
 	/*
 	 * By locking the child_mutex of the leader we effectively
@@ -4957,25 +4953,17 @@ static int perf_read_group(struct perf_event *event,
 			goto unlock;
 	}
 
-	mutex_unlock(&leader->child_mutex);
-
 	ret = event->read_size;
-	if (copy_to_user(buf, values, event->read_size))
-		ret = -EFAULT;
-	goto out;
-
 unlock:
 	mutex_unlock(&leader->child_mutex);
-out:
-	kfree(values);
 	return ret;
 }
 
 static int perf_read_one(struct perf_event *event,
-				 u64 read_format, char __user *buf)
+				 u64 read_format, char __user *buf,
+				 u64 *values)
 {
 	u64 enabled, running;
-	u64 values[4];
 	int n = 0;
 
 	values[n++] = __perf_event_read_value(event, &enabled, &running);
@@ -4986,9 +4974,6 @@ static int perf_read_one(struct perf_event *event,
 	if (read_format & PERF_FORMAT_ID)
 		values[n++] = primary_event_id(event);
 
-	if (copy_to_user(buf, values, n * sizeof(u64)))
-		return -EFAULT;
-
 	return n * sizeof(u64);
 }
 
@@ -5009,7 +4994,8 @@ static bool is_event_hup(struct perf_event *event)
  * Read the performance event - simple non blocking version for now
  */
 static ssize_t
-__perf_read(struct perf_event *event, char __user *buf, size_t count)
+__perf_read(struct perf_event *event, char __user *buf,
+		    size_t count, u64 *values)
 {
 	u64 read_format = event->attr.read_format;
 	int ret;
@@ -5027,9 +5013,9 @@ __perf_read(struct perf_event *event, char __user *buf, size_t count)
 
 	WARN_ON_ONCE(event->ctx->parent_ctx);
 	if (read_format & PERF_FORMAT_GROUP)
-		ret = perf_read_group(event, read_format, buf);
+		ret = perf_read_group(event, read_format, buf, values);
 	else
-		ret = perf_read_one(event, read_format, buf);
+		ret = perf_read_one(event, read_format, buf, values);
 
 	return ret;
 }
@@ -5039,6 +5025,7 @@ perf_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
 {
 	struct perf_event *event = file->private_data;
 	struct perf_event_context *ctx;
+	u64 *values;
 	int ret;
 
 	ret = security_perf_event_read(event);
@@ -5046,9 +5033,19 @@ perf_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
 		return ret;
 
 	ctx = perf_event_ctx_lock(event);
-	ret = __perf_read(event, buf, count);
+	values = kzalloc(event->read_size, GFP_KERNEL);
+	if (values)
+		ret = __perf_read(event, buf, count, values);
+	else
+		ret = -ENOMEM;
 	perf_event_ctx_unlock(event, ctx);
 
+	if (ret > 0) {
+		if (copy_to_user(buf, values, ret))
+			ret = -EFAULT;
+	}
+	kfree(values);
+
 	return ret;
 }
 
-- 
2.25.1

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[Intel-gfx] [PATCH 02/23] Revert "drm/i915/gem: Drop relocation slowpath"

[Maarten Lankhorst]

This reverts commit 7dc8f1143778 ("drm/i915/gem: Drop relocation
slowpath"). We need the slowpath relocation for taking ww-mutex
inside the page fault handler, and we will take this mutex when
pinning all objects.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 .../gpu/drm/i915/gem/i915_gem_execbuffer.c    | 239 +++++++++++++++++-
 1 file changed, 235 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index 9d11bad74e9a..b896bd527d5c 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -1521,7 +1521,9 @@ static int eb_relocate_vma(struct i915_execbuffer *eb, struct eb_vma *ev)
 		 * we would try to acquire the struct mutex again. Obviously
 		 * this is bad and so lockdep complains vehemently.
 		 */
-		copied = __copy_from_user(r, urelocs, count * sizeof(r[0]));
+		pagefault_disable();
+		copied = __copy_from_user_inatomic(r, urelocs, count * sizeof(r[0]));
+		pagefault_enable();
 		if (unlikely(copied)) {
 			remain = -EFAULT;
 			goto out;
@@ -1569,6 +1571,236 @@ static int eb_relocate_vma(struct i915_execbuffer *eb, struct eb_vma *ev)
 	return remain;
 }
 
+static int
+eb_relocate_vma_slow(struct i915_execbuffer *eb, struct eb_vma *ev)
+{
+	const struct drm_i915_gem_exec_object2 *entry = ev->exec;
+	struct drm_i915_gem_relocation_entry *relocs =
+		u64_to_ptr(typeof(*relocs), entry->relocs_ptr);
+	unsigned int i;
+	int err;
+
+	for (i = 0; i < entry->relocation_count; i++) {
+		u64 offset = eb_relocate_entry(eb, ev, &relocs[i]);
+
+		if ((s64)offset < 0) {
+			err = (int)offset;
+			goto err;
+		}
+	}
+	err = 0;
+err:
+	reloc_cache_reset(&eb->reloc_cache);
+	return err;
+}
+
+static int check_relocations(const struct drm_i915_gem_exec_object2 *entry)
+{
+	const char __user *addr, *end;
+	unsigned long size;
+	char __maybe_unused c;
+
+	size = entry->relocation_count;
+	if (size == 0)
+		return 0;
+
+	if (size > N_RELOC(ULONG_MAX))
+		return -EINVAL;
+
+	addr = u64_to_user_ptr(entry->relocs_ptr);
+	size *= sizeof(struct drm_i915_gem_relocation_entry);
+	if (!access_ok(addr, size))
+		return -EFAULT;
+
+	end = addr + size;
+	for (; addr < end; addr += PAGE_SIZE) {
+		int err = __get_user(c, addr);
+		if (err)
+			return err;
+	}
+	return __get_user(c, end - 1);
+}
+
+static int eb_copy_relocations(const struct i915_execbuffer *eb)
+{
+	struct drm_i915_gem_relocation_entry *relocs;
+	const unsigned int count = eb->buffer_count;
+	unsigned int i;
+	int err;
+
+	for (i = 0; i < count; i++) {
+		const unsigned int nreloc = eb->exec[i].relocation_count;
+		struct drm_i915_gem_relocation_entry __user *urelocs;
+		unsigned long size;
+		unsigned long copied;
+
+		if (nreloc == 0)
+			continue;
+
+		err = check_relocations(&eb->exec[i]);
+		if (err)
+			goto err;
+
+		urelocs = u64_to_user_ptr(eb->exec[i].relocs_ptr);
+		size = nreloc * sizeof(*relocs);
+
+		relocs = kvmalloc_array(size, 1, GFP_KERNEL);
+		if (!relocs) {
+			err = -ENOMEM;
+			goto err;
+		}
+
+		/* copy_from_user is limited to < 4GiB */
+		copied = 0;
+		do {
+			unsigned int len =
+				min_t(u64, BIT_ULL(31), size - copied);
+
+			if (__copy_from_user((char *)relocs + copied,
+					     (char __user *)urelocs + copied,
+					     len))
+				goto end;
+
+			copied += len;
+		} while (copied < size);
+
+		/*
+		 * As we do not update the known relocation offsets after
+		 * relocating (due to the complexities in lock handling),
+		 * we need to mark them as invalid now so that we force the
+		 * relocation processing next time. Just in case the target
+		 * object is evicted and then rebound into its old
+		 * presumed_offset before the next execbuffer - if that
+		 * happened we would make the mistake of assuming that the
+		 * relocations were valid.
+		 */
+		if (!user_access_begin(urelocs, size))
+			goto end;
+
+		for (copied = 0; copied < nreloc; copied++)
+			unsafe_put_user(-1,
+					&urelocs[copied].presumed_offset,
+					end_user);
+		user_access_end();
+
+		eb->exec[i].relocs_ptr = (uintptr_t)relocs;
+	}
+
+	return 0;
+
+end_user:
+	user_access_end();
+end:
+	kvfree(relocs);
+	err = -EFAULT;
+err:
+	while (i--) {
+		relocs = u64_to_ptr(typeof(*relocs), eb->exec[i].relocs_ptr);
+		if (eb->exec[i].relocation_count)
+			kvfree(relocs);
+	}
+	return err;
+}
+
+static int eb_prefault_relocations(const struct i915_execbuffer *eb)
+{
+	const unsigned int count = eb->buffer_count;
+	unsigned int i;
+
+	for (i = 0; i < count; i++) {
+		int err;
+
+		err = check_relocations(&eb->exec[i]);
+		if (err)
+			return err;
+	}
+
+	return 0;
+}
+
+static noinline int eb_relocate_slow(struct i915_execbuffer *eb)
+{
+	bool have_copy = false;
+	struct eb_vma *ev;
+	int err = 0;
+
+repeat:
+	if (signal_pending(current)) {
+		err = -ERESTARTSYS;
+		goto out;
+	}
+
+	/*
+	 * We take 3 passes through the slowpatch.
+	 *
+	 * 1 - we try to just prefault all the user relocation entries and
+	 * then attempt to reuse the atomic pagefault disabled fast path again.
+	 *
+	 * 2 - we copy the user entries to a local buffer here outside of the
+	 * local and allow ourselves to wait upon any rendering before
+	 * relocations
+	 *
+	 * 3 - we already have a local copy of the relocation entries, but
+	 * were interrupted (EAGAIN) whilst waiting for the objects, try again.
+	 */
+	if (!err) {
+		err = eb_prefault_relocations(eb);
+	} else if (!have_copy) {
+		err = eb_copy_relocations(eb);
+		have_copy = err == 0;
+	} else {
+		cond_resched();
+		err = 0;
+	}
+	if (err)
+		goto out;
+
+	list_for_each_entry(ev, &eb->relocs, reloc_link) {
+		if (!have_copy) {
+			pagefault_disable();
+			err = eb_relocate_vma(eb, ev);
+			pagefault_enable();
+			if (err)
+				goto repeat;
+		} else {
+			err = eb_relocate_vma_slow(eb, ev);
+			if (err)
+				goto err;
+		}
+	}
+
+	/*
+	 * Leave the user relocations as are, this is the painfully slow path,
+	 * and we want to avoid the complication of dropping the lock whilst
+	 * having buffers reserved in the aperture and so causing spurious
+	 * ENOSPC for random operations.
+	 */
+
+err:
+	if (err == -EAGAIN)
+		goto repeat;
+
+out:
+	if (have_copy) {
+		const unsigned int count = eb->buffer_count;
+		unsigned int i;
+
+		for (i = 0; i < count; i++) {
+			const struct drm_i915_gem_exec_object2 *entry =
+				&eb->exec[i];
+			struct drm_i915_gem_relocation_entry *relocs;
+
+			if (!entry->relocation_count)
+				continue;
+
+			relocs = u64_to_ptr(typeof(*relocs), entry->relocs_ptr);
+			kvfree(relocs);
+		}
+	}
+
+	return err;
+}
+
 static int eb_relocate(struct i915_execbuffer *eb)
 {
 	int err;
@@ -1588,9 +1820,8 @@ static int eb_relocate(struct i915_execbuffer *eb)
 		struct eb_vma *ev;
 
 		list_for_each_entry(ev, &eb->relocs, reloc_link) {
-			err = eb_relocate_vma(eb, ev);
-			if (err)
-				return err;
+			if (eb_relocate_vma(eb, ev))
+				return eb_relocate_slow(eb);
 		}
 	}
 
-- 
2.25.1

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[Intel-gfx] [PATCH 03/23] drm/i915: Add an implementation for i915_gem_ww_ctx locking, v2.

[Maarten Lankhorst]

i915_gem_ww_ctx is used to lock all gem bo's for pinning and memory
eviction. We don't use it yet, but lets start adding the definition
first.

To use it, we have to pass a non-NULL ww to gem_object_lock, and don't
unlock directly. It is done in i915_gem_ww_ctx_fini.

Changes since v1:
- Change ww_ctx and obj order in locking functions (Jonas Lahtinen)

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c  |  4 +-
 .../gpu/drm/i915/gem/i915_gem_client_blt.c    |  2 +-
 drivers/gpu/drm/i915/gem/i915_gem_context.c   |  2 +-
 drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c    |  4 +-
 drivers/gpu/drm/i915/gem/i915_gem_domain.c    | 10 ++--
 .../gpu/drm/i915/gem/i915_gem_execbuffer.c    |  4 +-
 drivers/gpu/drm/i915/gem/i915_gem_object.c    |  2 +-
 drivers/gpu/drm/i915/gem/i915_gem_object.h    | 38 +++++++++++---
 .../gpu/drm/i915/gem/i915_gem_object_blt.c    |  2 +-
 .../gpu/drm/i915/gem/i915_gem_object_types.h  |  9 ++++
 drivers/gpu/drm/i915/gem/i915_gem_pm.c        |  2 +-
 drivers/gpu/drm/i915/gem/i915_gem_tiling.c    |  2 +-
 .../gpu/drm/i915/gem/selftests/huge_pages.c   |  2 +-
 .../i915/gem/selftests/i915_gem_client_blt.c  |  2 +-
 .../i915/gem/selftests/i915_gem_coherency.c   | 10 ++--
 .../drm/i915/gem/selftests/i915_gem_context.c |  4 +-
 .../drm/i915/gem/selftests/i915_gem_mman.c    |  4 +-
 .../drm/i915/gem/selftests/i915_gem_phys.c    |  2 +-
 drivers/gpu/drm/i915/gt/intel_gt.c            |  2 +-
 .../gpu/drm/i915/gt/selftest_workarounds.c    |  2 +-
 drivers/gpu/drm/i915/gvt/cmd_parser.c         |  2 +-
 drivers/gpu/drm/i915/i915_gem.c               | 52 +++++++++++++++++--
 drivers/gpu/drm/i915/i915_gem.h               | 11 ++++
 drivers/gpu/drm/i915/selftests/i915_gem.c     | 41 +++++++++++++++
 drivers/gpu/drm/i915/selftests/i915_vma.c     |  2 +-
 .../drm/i915/selftests/intel_memory_region.c  |  2 +-
 26 files changed, 175 insertions(+), 44 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 70ec301fe6e3..76c6eaa368bf 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -2309,7 +2309,7 @@ intel_pin_and_fence_fb_obj(struct drm_framebuffer *fb,
 
 void intel_unpin_fb_vma(struct i915_vma *vma, unsigned long flags)
 {
-	i915_gem_object_lock(vma->obj);
+	i915_gem_object_lock(vma->obj, NULL);
 	if (flags & PLANE_HAS_FENCE)
 		i915_vma_unpin_fence(vma);
 	i915_gem_object_unpin_from_display_plane(vma);
@@ -16947,7 +16947,7 @@ static int intel_framebuffer_init(struct intel_framebuffer *intel_fb,
 	if (!intel_fb->frontbuffer)
 		return -ENOMEM;
 
-	i915_gem_object_lock(obj);
+	i915_gem_object_lock(obj, NULL);
 	tiling = i915_gem_object_get_tiling(obj);
 	stride = i915_gem_object_get_stride(obj);
 	i915_gem_object_unlock(obj);
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_client_blt.c b/drivers/gpu/drm/i915/gem/i915_gem_client_blt.c
index 0598e5382a1d..5d94a77f9bdd 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_client_blt.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_client_blt.c
@@ -287,7 +287,7 @@ int i915_gem_schedule_fill_pages_blt(struct drm_i915_gem_object *obj,
 	dma_fence_init(&work->dma, &clear_pages_work_ops, &fence_lock, 0, 0);
 	i915_sw_fence_init(&work->wait, clear_pages_work_notify);
 
-	i915_gem_object_lock(obj);
+	i915_gem_object_lock(obj, NULL);
 	err = i915_sw_fence_await_reservation(&work->wait,
 					      obj->base.resv, NULL,
 					      true, I915_FENCE_TIMEOUT,
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c
index 2b6dd08de6f1..fc8585031fcb 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c
@@ -113,7 +113,7 @@ static void lut_close(struct i915_gem_context *ctx)
 			continue;
 
 		rcu_read_unlock();
-		i915_gem_object_lock(obj);
+		i915_gem_object_lock(obj, NULL);
 		list_for_each_entry(lut, &obj->lut_list, obj_link) {
 			if (lut->ctx != ctx)
 				continue;
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c
index 7db5a793739d..cfadccfc2990 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c
@@ -128,7 +128,7 @@ static int i915_gem_begin_cpu_access(struct dma_buf *dma_buf, enum dma_data_dire
 	if (err)
 		return err;
 
-	err = i915_gem_object_lock_interruptible(obj);
+	err = i915_gem_object_lock_interruptible(obj, NULL);
 	if (err)
 		goto out;
 
@@ -149,7 +149,7 @@ static int i915_gem_end_cpu_access(struct dma_buf *dma_buf, enum dma_data_direct
 	if (err)
 		return err;
 
-	err = i915_gem_object_lock_interruptible(obj);
+	err = i915_gem_object_lock_interruptible(obj, NULL);
 	if (err)
 		goto out;
 
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_domain.c b/drivers/gpu/drm/i915/gem/i915_gem_domain.c
index af43e82f45c7..066310564b1a 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_domain.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_domain.c
@@ -32,7 +32,7 @@ void i915_gem_object_flush_if_display(struct drm_i915_gem_object *obj)
 	if (!i915_gem_object_is_framebuffer(obj))
 		return;
 
-	i915_gem_object_lock(obj);
+	i915_gem_object_lock(obj, NULL);
 	__i915_gem_object_flush_for_display(obj);
 	i915_gem_object_unlock(obj);
 }
@@ -197,7 +197,7 @@ int i915_gem_object_set_cache_level(struct drm_i915_gem_object *obj,
 	if (ret)
 		return ret;
 
-	ret = i915_gem_object_lock_interruptible(obj);
+	ret = i915_gem_object_lock_interruptible(obj, NULL);
 	if (ret)
 		return ret;
 
@@ -541,7 +541,7 @@ i915_gem_set_domain_ioctl(struct drm_device *dev, void *data,
 	if (err)
 		goto out;
 
-	err = i915_gem_object_lock_interruptible(obj);
+	err = i915_gem_object_lock_interruptible(obj, NULL);
 	if (err)
 		goto out_unpin;
 
@@ -581,7 +581,7 @@ int i915_gem_object_prepare_read(struct drm_i915_gem_object *obj,
 	if (!i915_gem_object_has_struct_page(obj))
 		return -ENODEV;
 
-	ret = i915_gem_object_lock_interruptible(obj);
+	ret = i915_gem_object_lock_interruptible(obj, NULL);
 	if (ret)
 		return ret;
 
@@ -635,7 +635,7 @@ int i915_gem_object_prepare_write(struct drm_i915_gem_object *obj,
 	if (!i915_gem_object_has_struct_page(obj))
 		return -ENODEV;
 
-	ret = i915_gem_object_lock_interruptible(obj);
+	ret = i915_gem_object_lock_interruptible(obj, NULL);
 	if (ret)
 		return ret;
 
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index b896bd527d5c..7cc5f9c1cea3 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -813,7 +813,7 @@ static int __eb_add_lut(struct i915_execbuffer *eb,
 		if (err == 0) { /* And nor has this handle */
 			struct drm_i915_gem_object *obj = vma->obj;
 
-			i915_gem_object_lock(obj);
+			i915_gem_object_lock(obj, NULL);
 			if (idr_find(&eb->file->object_idr, handle) == obj) {
 				list_add(&lut->obj_link, &obj->lut_list);
 			} else {
@@ -1081,7 +1081,7 @@ static void *reloc_iomap(struct drm_i915_gem_object *obj,
 		if (use_cpu_reloc(cache, obj))
 			return NULL;
 
-		i915_gem_object_lock(obj);
+		i915_gem_object_lock(obj, NULL);
 		err = i915_gem_object_set_to_gtt_domain(obj, true);
 		i915_gem_object_unlock(obj);
 		if (err)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.c b/drivers/gpu/drm/i915/gem/i915_gem_object.c
index 3f01cdd1a39b..cf7661afd640 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object.c
@@ -104,7 +104,7 @@ void i915_gem_close_object(struct drm_gem_object *gem, struct drm_file *file)
 	struct i915_lut_handle *lut, *ln;
 	LIST_HEAD(close);
 
-	i915_gem_object_lock(obj);
+	i915_gem_object_lock(obj, NULL);
 	list_for_each_entry_safe(lut, ln, &obj->lut_list, obj_link) {
 		struct i915_gem_context *ctx = lut->ctx;
 
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.h b/drivers/gpu/drm/i915/gem/i915_gem_object.h
index 2faa481cc18f..5103067269b0 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object.h
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object.h
@@ -110,20 +110,44 @@ i915_gem_object_put(struct drm_i915_gem_object *obj)
 
 #define assert_object_held(obj) dma_resv_assert_held((obj)->base.resv)
 
-static inline void i915_gem_object_lock(struct drm_i915_gem_object *obj)
+static inline int __i915_gem_object_lock(struct drm_i915_gem_object *obj,
+					 struct i915_gem_ww_ctx *ww,
+					 bool intr)
 {
-	dma_resv_lock(obj->base.resv, NULL);
+	int ret;
+
+	if (intr)
+		ret = dma_resv_lock_interruptible(obj->base.resv, ww ? &ww->ctx : NULL);
+	else
+		ret = dma_resv_lock(obj->base.resv, ww ? &ww->ctx : NULL);
+
+	if (!ret && ww)
+		list_add_tail(&obj->obj_link, &ww->obj_list);
+	if (ret == -EALREADY)
+		ret = 0;
+
+	if (ret == -EDEADLK)
+		ww->contended = obj;
+
+	return ret;
 }
 
-static inline bool i915_gem_object_trylock(struct drm_i915_gem_object *obj)
+static inline int i915_gem_object_lock(struct drm_i915_gem_object *obj,
+				       struct i915_gem_ww_ctx *ww)
 {
-	return dma_resv_trylock(obj->base.resv);
+	return __i915_gem_object_lock(obj, ww, ww && ww->intr);
 }
 
-static inline int
-i915_gem_object_lock_interruptible(struct drm_i915_gem_object *obj)
+static inline int i915_gem_object_lock_interruptible(struct drm_i915_gem_object *obj,
+						     struct i915_gem_ww_ctx *ww)
 {
-	return dma_resv_lock_interruptible(obj->base.resv, NULL);
+	WARN_ON(ww && !ww->intr);
+	return __i915_gem_object_lock(obj, ww, true);
+}
+
+static inline bool i915_gem_object_trylock(struct drm_i915_gem_object *obj)
+{
+	return dma_resv_trylock(obj->base.resv);
 }
 
 static inline void i915_gem_object_unlock(struct drm_i915_gem_object *obj)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object_blt.c b/drivers/gpu/drm/i915/gem/i915_gem_object_blt.c
index e00792158f13..dfb0601802bc 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object_blt.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object_blt.c
@@ -142,7 +142,7 @@ int i915_gem_object_fill_blt(struct drm_i915_gem_object *obj,
 		return err;
 
 	if (obj->cache_dirty & ~obj->cache_coherent) {
-		i915_gem_object_lock(obj);
+		i915_gem_object_lock(obj, NULL);
 		i915_gem_clflush_object(obj, 0);
 		i915_gem_object_unlock(obj);
 	}
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
index 54ee658bb168..80951e35f86f 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
@@ -120,6 +120,15 @@ struct drm_i915_gem_object {
 	 */
 	struct list_head lut_list;
 
+	/**
+	 * @obj_link: Link into @i915_gem_ww_ctx.obj_list
+	 *
+	 * When we lock this object through i915_gem_object_lock() with a
+	 * context, we add it to the list to ensure we can unlock everything
+	 * when i915_gem_ww_ctx_backoff() or i915_gem_ww_ctx_fini() are called.
+	 */
+	struct list_head obj_link;
+
 	/** Stolen memory for this object, instead of being backed by shmem. */
 	struct drm_mm_node *stolen;
 	union {
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_pm.c b/drivers/gpu/drm/i915/gem/i915_gem_pm.c
index 3d215164dd5a..40d3e40500fa 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_pm.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_pm.c
@@ -84,7 +84,7 @@ void i915_gem_suspend_late(struct drm_i915_private *i915)
 
 			spin_unlock_irqrestore(&i915->mm.obj_lock, flags);
 
-			i915_gem_object_lock(obj);
+			i915_gem_object_lock(obj, NULL);
 			drm_WARN_ON(&i915->drm,
 			    i915_gem_object_set_to_gtt_domain(obj, false));
 			i915_gem_object_unlock(obj);
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_tiling.c b/drivers/gpu/drm/i915/gem/i915_gem_tiling.c
index 37f77aee1212..676aca5180d5 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_tiling.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_tiling.c
@@ -235,7 +235,7 @@ i915_gem_object_set_tiling(struct drm_i915_gem_object *obj,
 	 * whilst executing a fenced command for an untiled object.
 	 */
 
-	i915_gem_object_lock(obj);
+	i915_gem_object_lock(obj, NULL);
 	if (i915_gem_object_is_framebuffer(obj)) {
 		i915_gem_object_unlock(obj);
 		return -EBUSY;
diff --git a/drivers/gpu/drm/i915/gem/selftests/huge_pages.c b/drivers/gpu/drm/i915/gem/selftests/huge_pages.c
index 2d0fd50c5312..2a2f33228b3d 100644
--- a/drivers/gpu/drm/i915/gem/selftests/huge_pages.c
+++ b/drivers/gpu/drm/i915/gem/selftests/huge_pages.c
@@ -974,7 +974,7 @@ static int gpu_write(struct intel_context *ce,
 {
 	int err;
 
-	i915_gem_object_lock(vma->obj);
+	i915_gem_object_lock(vma->obj, NULL);
 	err = i915_gem_object_set_to_gtt_domain(vma->obj, true);
 	i915_gem_object_unlock(vma->obj);
 	if (err)
diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_client_blt.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_client_blt.c
index b972be165e85..a4bf026b2988 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_client_blt.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_client_blt.c
@@ -72,7 +72,7 @@ static int __igt_client_fill(struct intel_engine_cs *engine)
 		if (err)
 			goto err_unpin;
 
-		i915_gem_object_lock(obj);
+		i915_gem_object_lock(obj, NULL);
 		err = i915_gem_object_set_to_cpu_domain(obj, false);
 		i915_gem_object_unlock(obj);
 		if (err)
diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c
index 3f6079e1dfb6..f5a0c7b1e113 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c
@@ -82,7 +82,7 @@ static int gtt_set(struct context *ctx, unsigned long offset, u32 v)
 	u32 __iomem *map;
 	int err = 0;
 
-	i915_gem_object_lock(ctx->obj);
+	i915_gem_object_lock(ctx->obj, NULL);
 	err = i915_gem_object_set_to_gtt_domain(ctx->obj, true);
 	i915_gem_object_unlock(ctx->obj);
 	if (err)
@@ -115,7 +115,7 @@ static int gtt_get(struct context *ctx, unsigned long offset, u32 *v)
 	u32 __iomem *map;
 	int err = 0;
 
-	i915_gem_object_lock(ctx->obj);
+	i915_gem_object_lock(ctx->obj, NULL);
 	err = i915_gem_object_set_to_gtt_domain(ctx->obj, false);
 	i915_gem_object_unlock(ctx->obj);
 	if (err)
@@ -147,7 +147,7 @@ static int wc_set(struct context *ctx, unsigned long offset, u32 v)
 	u32 *map;
 	int err;
 
-	i915_gem_object_lock(ctx->obj);
+	i915_gem_object_lock(ctx->obj, NULL);
 	err = i915_gem_object_set_to_wc_domain(ctx->obj, true);
 	i915_gem_object_unlock(ctx->obj);
 	if (err)
@@ -168,7 +168,7 @@ static int wc_get(struct context *ctx, unsigned long offset, u32 *v)
 	u32 *map;
 	int err;
 
-	i915_gem_object_lock(ctx->obj);
+	i915_gem_object_lock(ctx->obj, NULL);
 	err = i915_gem_object_set_to_wc_domain(ctx->obj, false);
 	i915_gem_object_unlock(ctx->obj);
 	if (err)
@@ -191,7 +191,7 @@ static int gpu_set(struct context *ctx, unsigned long offset, u32 v)
 	u32 *cs;
 	int err;
 
-	i915_gem_object_lock(ctx->obj);
+	i915_gem_object_lock(ctx->obj, NULL);
 	err = i915_gem_object_set_to_gtt_domain(ctx->obj, true);
 	i915_gem_object_unlock(ctx->obj);
 	if (err)
diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
index f4f933240b39..265096de05ca 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
@@ -950,7 +950,7 @@ emit_rpcs_query(struct drm_i915_gem_object *obj,
 	if (IS_ERR(vma))
 		return PTR_ERR(vma);
 
-	i915_gem_object_lock(obj);
+	i915_gem_object_lock(obj, NULL);
 	err = i915_gem_object_set_to_gtt_domain(obj, false);
 	i915_gem_object_unlock(obj);
 	if (err)
@@ -1691,7 +1691,7 @@ static int read_from_scratch(struct i915_gem_context *ctx,
 
 	i915_request_add(rq);
 
-	i915_gem_object_lock(obj);
+	i915_gem_object_lock(obj, NULL);
 	err = i915_gem_object_set_to_cpu_domain(obj, false);
 	i915_gem_object_unlock(obj);
 	if (err)
diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
index ef7abcb3f4ee..eec58da734bd 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
@@ -103,7 +103,7 @@ static int check_partial_mapping(struct drm_i915_gem_object *obj,
 	GEM_BUG_ON(i915_gem_object_get_tiling(obj) != tile->tiling);
 	GEM_BUG_ON(i915_gem_object_get_stride(obj) != tile->stride);
 
-	i915_gem_object_lock(obj);
+	i915_gem_object_lock(obj, NULL);
 	err = i915_gem_object_set_to_gtt_domain(obj, true);
 	i915_gem_object_unlock(obj);
 	if (err) {
@@ -188,7 +188,7 @@ static int check_partial_mappings(struct drm_i915_gem_object *obj,
 	GEM_BUG_ON(i915_gem_object_get_tiling(obj) != tile->tiling);
 	GEM_BUG_ON(i915_gem_object_get_stride(obj) != tile->stride);
 
-	i915_gem_object_lock(obj);
+	i915_gem_object_lock(obj, NULL);
 	err = i915_gem_object_set_to_gtt_domain(obj, true);
 	i915_gem_object_unlock(obj);
 	if (err) {
diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_phys.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_phys.c
index 34932871b3a5..a94243dc4c5c 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_phys.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_phys.c
@@ -44,7 +44,7 @@ static int mock_phys_object(void *arg)
 	}
 
 	/* Make the object dirty so that put_pages must do copy back the data */
-	i915_gem_object_lock(obj);
+	i915_gem_object_lock(obj, NULL);
 	err = i915_gem_object_set_to_gtt_domain(obj, true);
 	i915_gem_object_unlock(obj);
 	if (err) {
diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c
index 1c99cc72305a..6eae4c791007 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt.c
@@ -485,7 +485,7 @@ static int __engines_record_defaults(struct intel_gt *gt)
 		if (err)
 			goto out;
 
-		i915_gem_object_lock(state->obj);
+		i915_gem_object_lock(state->obj, NULL);
 		err = i915_gem_object_set_to_cpu_domain(state->obj, false);
 		i915_gem_object_unlock(state->obj);
 		if (err)
diff --git a/drivers/gpu/drm/i915/gt/selftest_workarounds.c b/drivers/gpu/drm/i915/gt/selftest_workarounds.c
index 5ed323254ee1..282f51feacd5 100644
--- a/drivers/gpu/drm/i915/gt/selftest_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/selftest_workarounds.c
@@ -214,7 +214,7 @@ static int check_whitelist(struct i915_gem_context *ctx,
 		return PTR_ERR(results);
 
 	err = 0;
-	i915_gem_object_lock(results);
+	i915_gem_object_lock(results, NULL);
 	intel_wedge_on_timeout(&wedge, engine->gt, HZ / 5) /* safety net! */
 		err = i915_gem_object_set_to_cpu_domain(results, false);
 	i915_gem_object_unlock(results);
diff --git a/drivers/gpu/drm/i915/gvt/cmd_parser.c b/drivers/gpu/drm/i915/gvt/cmd_parser.c
index a3cc080a46c6..cb91e9e097a7 100644
--- a/drivers/gpu/drm/i915/gvt/cmd_parser.c
+++ b/drivers/gpu/drm/i915/gvt/cmd_parser.c
@@ -2949,7 +2949,7 @@ static int shadow_indirect_ctx(struct intel_shadow_wa_ctx *wa_ctx)
 		goto put_obj;
 	}
 
-	i915_gem_object_lock(obj);
+	i915_gem_object_lock(obj, NULL);
 	ret = i915_gem_object_set_to_cpu_domain(obj, false);
 	i915_gem_object_unlock(obj);
 	if (ret) {
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 0cbcb9f54e7d..3eedd4e0ebab 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -420,7 +420,7 @@ i915_gem_gtt_pread(struct drm_i915_gem_object *obj,
 		GEM_BUG_ON(!drm_mm_node_allocated(&node));
 	}
 
-	ret = i915_gem_object_lock_interruptible(obj);
+	ret = i915_gem_object_lock_interruptible(obj, NULL);
 	if (ret)
 		goto out_unpin;
 
@@ -619,7 +619,7 @@ i915_gem_gtt_pwrite_fast(struct drm_i915_gem_object *obj,
 		GEM_BUG_ON(!drm_mm_node_allocated(&node));
 	}
 
-	ret = i915_gem_object_lock_interruptible(obj);
+	ret = i915_gem_object_lock_interruptible(obj, NULL);
 	if (ret)
 		goto out_unpin;
 
@@ -1272,7 +1272,7 @@ int i915_gem_freeze_late(struct drm_i915_private *i915)
 	i915_gem_drain_freed_objects(i915);
 
 	list_for_each_entry(obj, &i915->mm.shrink_list, mm.link) {
-		i915_gem_object_lock(obj);
+		i915_gem_object_lock(obj, NULL);
 		drm_WARN_ON(&i915->drm,
 			    i915_gem_object_set_to_cpu_domain(obj, true));
 		i915_gem_object_unlock(obj);
@@ -1326,6 +1326,52 @@ int i915_gem_open(struct drm_i915_private *i915, struct drm_file *file)
 	return ret;
 }
 
+void i915_gem_ww_ctx_init(struct i915_gem_ww_ctx *ww, bool intr)
+{
+	ww_acquire_init(&ww->ctx, &reservation_ww_class);
+	INIT_LIST_HEAD(&ww->obj_list);
+	ww->intr = intr;
+	ww->contended = NULL;
+}
+
+static void i915_gem_ww_ctx_unlock_all(struct i915_gem_ww_ctx *ww)
+{
+	struct drm_i915_gem_object *obj;
+
+	while ((obj = list_first_entry_or_null(&ww->obj_list, struct drm_i915_gem_object, obj_link))) {
+		list_del(&obj->obj_link);
+		i915_gem_object_unlock(obj);
+	}
+}
+
+void i915_gem_ww_ctx_fini(struct i915_gem_ww_ctx *ww)
+{
+	i915_gem_ww_ctx_unlock_all(ww);
+	WARN_ON(ww->contended);
+	ww_acquire_fini(&ww->ctx);
+}
+
+int __must_check i915_gem_ww_ctx_backoff(struct i915_gem_ww_ctx *ww)
+{
+	int ret = 0;
+
+	if (WARN_ON(!ww->contended))
+		return -EINVAL;
+
+	i915_gem_ww_ctx_unlock_all(ww);
+	if (ww->intr)
+		ret = dma_resv_lock_slow_interruptible(ww->contended->base.resv, &ww->ctx);
+	else
+		dma_resv_lock_slow(ww->contended->base.resv, &ww->ctx);
+
+	if (!ret)
+		list_add_tail(&ww->contended->obj_link, &ww->obj_list);
+
+	ww->contended = NULL;
+
+	return ret;
+}
+
 #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
 #include "selftests/mock_gem_device.c"
 #include "selftests/i915_gem.c"
diff --git a/drivers/gpu/drm/i915/i915_gem.h b/drivers/gpu/drm/i915/i915_gem.h
index 1753c84d6c0d..988755dbf4be 100644
--- a/drivers/gpu/drm/i915/i915_gem.h
+++ b/drivers/gpu/drm/i915/i915_gem.h
@@ -116,4 +116,15 @@ static inline bool __tasklet_is_scheduled(struct tasklet_struct *t)
 	return test_bit(TASKLET_STATE_SCHED, &t->state);
 }
 
+struct i915_gem_ww_ctx {
+	struct ww_acquire_ctx ctx;
+	struct list_head obj_list;
+	bool intr;
+	struct drm_i915_gem_object *contended;
+};
+
+void i915_gem_ww_ctx_init(struct i915_gem_ww_ctx *ctx, bool intr);
+void i915_gem_ww_ctx_fini(struct i915_gem_ww_ctx *ctx);
+int __must_check i915_gem_ww_ctx_backoff(struct i915_gem_ww_ctx *ctx);
+
 #endif /* __I915_GEM_H__ */
diff --git a/drivers/gpu/drm/i915/selftests/i915_gem.c b/drivers/gpu/drm/i915/selftests/i915_gem.c
index 88d400b9df88..23a6132c5f4e 100644
--- a/drivers/gpu/drm/i915/selftests/i915_gem.c
+++ b/drivers/gpu/drm/i915/selftests/i915_gem.c
@@ -199,11 +199,52 @@ static int igt_gem_hibernate(void *arg)
 	return err;
 }
 
+static int igt_gem_ww_ctx(void *arg)
+{
+	struct drm_i915_private *i915 = arg;
+	struct drm_i915_gem_object *obj, *obj2;
+	struct i915_gem_ww_ctx ww;
+	int err = 0;
+
+	obj = i915_gem_object_create_internal(i915, PAGE_SIZE);
+	if (IS_ERR(obj))
+		return PTR_ERR(obj);
+
+	obj2 = i915_gem_object_create_internal(i915, PAGE_SIZE);
+	if (IS_ERR(obj)) {
+		err = PTR_ERR(obj);
+		goto put1;
+	}
+
+	i915_gem_ww_ctx_init(&ww, true);
+retry:
+	/* Lock the objects, twice for good measure (-EALREADY handling) */
+	err = i915_gem_object_lock(obj, &ww);
+	if (!err)
+		err = i915_gem_object_lock_interruptible(obj, &ww);
+	if (!err)
+		err = i915_gem_object_lock_interruptible(obj2, &ww);
+	if (!err)
+		err = i915_gem_object_lock(obj2, &ww);
+
+	if (err == -EDEADLK) {
+		err = i915_gem_ww_ctx_backoff(&ww);
+		if (!err)
+			goto retry;
+	}
+	i915_gem_ww_ctx_fini(&ww);
+	i915_gem_object_put(obj2);
+put1:
+	i915_gem_object_put(obj);
+	return err;
+}
+
 int i915_gem_live_selftests(struct drm_i915_private *i915)
 {
 	static const struct i915_subtest tests[] = {
 		SUBTEST(igt_gem_suspend),
 		SUBTEST(igt_gem_hibernate),
+		SUBTEST(igt_gem_ww_ctx),
 	};
 
 	if (intel_gt_is_wedged(&i915->gt))
diff --git a/drivers/gpu/drm/i915/selftests/i915_vma.c b/drivers/gpu/drm/i915/selftests/i915_vma.c
index 58b5f40a07dd..9bc00c724b0e 100644
--- a/drivers/gpu/drm/i915/selftests/i915_vma.c
+++ b/drivers/gpu/drm/i915/selftests/i915_vma.c
@@ -892,7 +892,7 @@ static int igt_vma_remapped_gtt(void *arg)
 			unsigned int x, y;
 			int err;
 
-			i915_gem_object_lock(obj);
+			i915_gem_object_lock(obj, NULL);
 			err = i915_gem_object_set_to_gtt_domain(obj, true);
 			i915_gem_object_unlock(obj);
 			if (err)
diff --git a/drivers/gpu/drm/i915/selftests/intel_memory_region.c b/drivers/gpu/drm/i915/selftests/intel_memory_region.c
index 6e80d99048e4..957a7a52def7 100644
--- a/drivers/gpu/drm/i915/selftests/intel_memory_region.c
+++ b/drivers/gpu/drm/i915/selftests/intel_memory_region.c
@@ -509,7 +509,7 @@ static int igt_lmem_write_cpu(void *arg)
 	if (err)
 		goto out_unpin;
 
-	i915_gem_object_lock(obj);
+	i915_gem_object_lock(obj, NULL);
 	err = i915_gem_object_set_to_wc_domain(obj, true);
 	i915_gem_object_unlock(obj);
 	if (err)
-- 
2.25.1

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[Intel-gfx] [PATCH 04/23] drm/i915: Remove locking from i915_gem_object_prepare_read/write

[Maarten Lankhorst]

Execbuffer submission will perform its own WW locking, and we
cannot rely on the implicit lock there.

This also makes it clear that the GVT code will get a lockdep splat when
multiple batchbuffer shadows need to be performed in the same instance,
fix that up.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_domain.c    | 20 ++++++-------------
 .../gpu/drm/i915/gem/i915_gem_execbuffer.c    | 13 ++++++++++--
 drivers/gpu/drm/i915/gem/i915_gem_object.h    |  1 -
 .../gpu/drm/i915/gem/selftests/huge_pages.c   |  5 ++++-
 .../i915/gem/selftests/i915_gem_coherency.c   | 14 +++++++++----
 .../drm/i915/gem/selftests/i915_gem_context.c | 12 ++++++++---
 drivers/gpu/drm/i915/gt/intel_renderstate.c   |  5 ++++-
 drivers/gpu/drm/i915/gvt/cmd_parser.c         |  9 ++++++++-
 drivers/gpu/drm/i915/i915_gem.c               | 20 +++++++++++++++++--
 9 files changed, 70 insertions(+), 29 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_domain.c b/drivers/gpu/drm/i915/gem/i915_gem_domain.c
index 066310564b1a..1a3dd77a35b9 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_domain.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_domain.c
@@ -581,19 +581,17 @@ int i915_gem_object_prepare_read(struct drm_i915_gem_object *obj,
 	if (!i915_gem_object_has_struct_page(obj))
 		return -ENODEV;
 
-	ret = i915_gem_object_lock_interruptible(obj, NULL);
-	if (ret)
-		return ret;
+	assert_object_held(obj);
 
 	ret = i915_gem_object_wait(obj,
 				   I915_WAIT_INTERRUPTIBLE,
 				   MAX_SCHEDULE_TIMEOUT);
 	if (ret)
-		goto err_unlock;
+		return ret;
 
 	ret = i915_gem_object_pin_pages(obj);
 	if (ret)
-		goto err_unlock;
+		return ret;
 
 	if (obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_READ ||
 	    !static_cpu_has(X86_FEATURE_CLFLUSH)) {
@@ -621,8 +619,6 @@ int i915_gem_object_prepare_read(struct drm_i915_gem_object *obj,
 
 err_unpin:
 	i915_gem_object_unpin_pages(obj);
-err_unlock:
-	i915_gem_object_unlock(obj);
 	return ret;
 }
 
@@ -635,20 +631,18 @@ int i915_gem_object_prepare_write(struct drm_i915_gem_object *obj,
 	if (!i915_gem_object_has_struct_page(obj))
 		return -ENODEV;
 
-	ret = i915_gem_object_lock_interruptible(obj, NULL);
-	if (ret)
-		return ret;
+	assert_object_held(obj);
 
 	ret = i915_gem_object_wait(obj,
 				   I915_WAIT_INTERRUPTIBLE |
 				   I915_WAIT_ALL,
 				   MAX_SCHEDULE_TIMEOUT);
 	if (ret)
-		goto err_unlock;
+		return ret;
 
 	ret = i915_gem_object_pin_pages(obj);
 	if (ret)
-		goto err_unlock;
+		return ret;
 
 	if (obj->cache_coherent & I915_BO_CACHE_COHERENT_FOR_WRITE ||
 	    !static_cpu_has(X86_FEATURE_CLFLUSH)) {
@@ -685,7 +679,5 @@ int i915_gem_object_prepare_write(struct drm_i915_gem_object *obj,
 
 err_unpin:
 	i915_gem_object_unpin_pages(obj);
-err_unlock:
-	i915_gem_object_unlock(obj);
 	return ret;
 }
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index 7cc5f9c1cea3..55066dc0e1fe 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -1001,11 +1001,14 @@ static void reloc_cache_reset(struct reloc_cache *cache)
 
 	vaddr = unmask_page(cache->vaddr);
 	if (cache->vaddr & KMAP) {
+		struct drm_i915_gem_object *obj =
+			(struct drm_i915_gem_object *)cache->node.mm;
 		if (cache->vaddr & CLFLUSH_AFTER)
 			mb();
 
 		kunmap_atomic(vaddr);
-		i915_gem_object_finish_access((struct drm_i915_gem_object *)cache->node.mm);
+		i915_gem_object_finish_access(obj);
+		i915_gem_object_unlock(obj);
 	} else {
 		struct i915_ggtt *ggtt = cache_to_ggtt(cache);
 
@@ -1040,10 +1043,16 @@ static void *reloc_kmap(struct drm_i915_gem_object *obj,
 		unsigned int flushes;
 		int err;
 
-		err = i915_gem_object_prepare_write(obj, &flushes);
+		err = i915_gem_object_lock_interruptible(obj, NULL);
 		if (err)
 			return ERR_PTR(err);
 
+		err = i915_gem_object_prepare_write(obj, &flushes);
+		if (err) {
+			i915_gem_object_unlock(obj);
+			return ERR_PTR(err);
+		}
+
 		BUILD_BUG_ON(KMAP & CLFLUSH_FLAGS);
 		BUILD_BUG_ON((KMAP | CLFLUSH_FLAGS) & PAGE_MASK);
 
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.h b/drivers/gpu/drm/i915/gem/i915_gem_object.h
index 5103067269b0..11b8e2735071 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object.h
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object.h
@@ -434,7 +434,6 @@ static inline void
 i915_gem_object_finish_access(struct drm_i915_gem_object *obj)
 {
 	i915_gem_object_unpin_pages(obj);
-	i915_gem_object_unlock(obj);
 }
 
 static inline struct intel_engine_cs *
diff --git a/drivers/gpu/drm/i915/gem/selftests/huge_pages.c b/drivers/gpu/drm/i915/gem/selftests/huge_pages.c
index 2a2f33228b3d..36db96f902cc 100644
--- a/drivers/gpu/drm/i915/gem/selftests/huge_pages.c
+++ b/drivers/gpu/drm/i915/gem/selftests/huge_pages.c
@@ -991,9 +991,10 @@ __cpu_check_shmem(struct drm_i915_gem_object *obj, u32 dword, u32 val)
 	unsigned long n;
 	int err;
 
+	i915_gem_object_lock(obj, NULL);
 	err = i915_gem_object_prepare_read(obj, &needs_flush);
 	if (err)
-		return err;
+		goto err_unlock;
 
 	for (n = 0; n < obj->base.size >> PAGE_SHIFT; ++n) {
 		u32 *ptr = kmap_atomic(i915_gem_object_get_page(obj, n));
@@ -1013,6 +1014,8 @@ __cpu_check_shmem(struct drm_i915_gem_object *obj, u32 dword, u32 val)
 	}
 
 	i915_gem_object_finish_access(obj);
+err_unlock:
+	i915_gem_object_unlock(obj);
 
 	return err;
 }
diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c
index f5a0c7b1e113..99f8466a108a 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c
@@ -27,9 +27,10 @@ static int cpu_set(struct context *ctx, unsigned long offset, u32 v)
 	u32 *cpu;
 	int err;
 
+	i915_gem_object_lock(ctx->obj, NULL);
 	err = i915_gem_object_prepare_write(ctx->obj, &needs_clflush);
 	if (err)
-		return err;
+		goto out;
 
 	page = i915_gem_object_get_page(ctx->obj, offset >> PAGE_SHIFT);
 	map = kmap_atomic(page);
@@ -46,7 +47,9 @@ static int cpu_set(struct context *ctx, unsigned long offset, u32 v)
 	kunmap_atomic(map);
 	i915_gem_object_finish_access(ctx->obj);
 
-	return 0;
+out:
+	i915_gem_object_unlock(ctx->obj);
+	return err;
 }
 
 static int cpu_get(struct context *ctx, unsigned long offset, u32 *v)
@@ -57,9 +60,10 @@ static int cpu_get(struct context *ctx, unsigned long offset, u32 *v)
 	u32 *cpu;
 	int err;
 
+	i915_gem_object_lock(ctx->obj, NULL);
 	err = i915_gem_object_prepare_read(ctx->obj, &needs_clflush);
 	if (err)
-		return err;
+		goto out;
 
 	page = i915_gem_object_get_page(ctx->obj, offset >> PAGE_SHIFT);
 	map = kmap_atomic(page);
@@ -73,7 +77,9 @@ static int cpu_get(struct context *ctx, unsigned long offset, u32 *v)
 	kunmap_atomic(map);
 	i915_gem_object_finish_access(ctx->obj);
 
-	return 0;
+out:
+	i915_gem_object_unlock(ctx->obj);
+	return err;
 }
 
 static int gtt_set(struct context *ctx, unsigned long offset, u32 v)
diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
index 265096de05ca..42edbd0f3c14 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
@@ -461,9 +461,10 @@ static int cpu_fill(struct drm_i915_gem_object *obj, u32 value)
 	unsigned int n, m, need_flush;
 	int err;
 
+	i915_gem_object_lock(obj, NULL);
 	err = i915_gem_object_prepare_write(obj, &need_flush);
 	if (err)
-		return err;
+		goto out;
 
 	for (n = 0; n < real_page_count(obj); n++) {
 		u32 *map;
@@ -479,7 +480,9 @@ static int cpu_fill(struct drm_i915_gem_object *obj, u32 value)
 	i915_gem_object_finish_access(obj);
 	obj->read_domains = I915_GEM_DOMAIN_GTT | I915_GEM_DOMAIN_CPU;
 	obj->write_domain = 0;
-	return 0;
+out:
+	i915_gem_object_unlock(obj);
+	return err;
 }
 
 static noinline int cpu_check(struct drm_i915_gem_object *obj,
@@ -488,9 +491,10 @@ static noinline int cpu_check(struct drm_i915_gem_object *obj,
 	unsigned int n, m, needs_flush;
 	int err;
 
+	i915_gem_object_lock(obj, NULL);
 	err = i915_gem_object_prepare_read(obj, &needs_flush);
 	if (err)
-		return err;
+		goto out_unlock;
 
 	for (n = 0; n < real_page_count(obj); n++) {
 		u32 *map;
@@ -527,6 +531,8 @@ static noinline int cpu_check(struct drm_i915_gem_object *obj,
 	}
 
 	i915_gem_object_finish_access(obj);
+out_unlock:
+	i915_gem_object_unlock(obj);
 	return err;
 }
 
diff --git a/drivers/gpu/drm/i915/gt/intel_renderstate.c b/drivers/gpu/drm/i915/gt/intel_renderstate.c
index 26e78db33675..ca533d98d14d 100644
--- a/drivers/gpu/drm/i915/gt/intel_renderstate.c
+++ b/drivers/gpu/drm/i915/gt/intel_renderstate.c
@@ -74,9 +74,10 @@ static int render_state_setup(struct intel_renderstate *so,
 	u32 *d;
 	int ret;
 
+	i915_gem_object_lock(so->vma->obj, NULL);
 	ret = i915_gem_object_prepare_write(so->vma->obj, &needs_clflush);
 	if (ret)
-		return ret;
+		goto out_unlock;
 
 	d = kmap_atomic(i915_gem_object_get_dirty_page(so->vma->obj, 0));
 
@@ -157,6 +158,8 @@ static int render_state_setup(struct intel_renderstate *so,
 	ret = 0;
 out:
 	i915_gem_object_finish_access(so->vma->obj);
+out_unlock:
+	i915_gem_object_unlock(so->vma->obj);
 	return ret;
 
 err:
diff --git a/drivers/gpu/drm/i915/gvt/cmd_parser.c b/drivers/gpu/drm/i915/gvt/cmd_parser.c
index cb91e9e097a7..e5b49fa8ab7d 100644
--- a/drivers/gpu/drm/i915/gvt/cmd_parser.c
+++ b/drivers/gpu/drm/i915/gvt/cmd_parser.c
@@ -1859,10 +1859,14 @@ static int perform_bb_shadow(struct parser_exec_state *s)
 		goto err_free_bb;
 	}
 
-	ret = i915_gem_object_prepare_write(bb->obj, &bb->clflush);
+	ret = i915_gem_object_lock_interruptible(bb->obj, NULL);
 	if (ret)
 		goto err_free_obj;
 
+	ret = i915_gem_object_prepare_write(bb->obj, &bb->clflush);
+	if (ret)
+		goto err_unlock;
+
 	bb->va = i915_gem_object_pin_map(bb->obj, I915_MAP_WB);
 	if (IS_ERR(bb->va)) {
 		ret = PTR_ERR(bb->va);
@@ -1887,6 +1891,7 @@ static int perform_bb_shadow(struct parser_exec_state *s)
 	if (ret)
 		goto err_unmap;
 
+	i915_gem_object_unlock(bb->obj);
 	INIT_LIST_HEAD(&bb->list);
 	list_add(&bb->list, &s->workload->shadow_bb);
 
@@ -1913,6 +1918,8 @@ static int perform_bb_shadow(struct parser_exec_state *s)
 	i915_gem_object_unpin_map(bb->obj);
 err_finish_shmem_access:
 	i915_gem_object_finish_access(bb->obj);
+err_unlock:
+	i915_gem_object_unlock(bb->obj);
 err_free_obj:
 	i915_gem_object_put(bb->obj);
 err_free_bb:
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 3eedd4e0ebab..6846241f9079 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -335,12 +335,20 @@ i915_gem_shmem_pread(struct drm_i915_gem_object *obj,
 	u64 remain;
 	int ret;
 
-	ret = i915_gem_object_prepare_read(obj, &needs_clflush);
+	ret = i915_gem_object_lock_interruptible(obj, NULL);
 	if (ret)
 		return ret;
 
+	ret = i915_gem_object_prepare_read(obj, &needs_clflush);
+	if (ret) {
+		i915_gem_object_unlock(obj);
+		return ret;
+	}
+
 	fence = i915_gem_object_lock_fence(obj);
 	i915_gem_object_finish_access(obj);
+	i915_gem_object_unlock(obj);
+
 	if (!fence)
 		return -ENOMEM;
 
@@ -734,12 +742,20 @@ i915_gem_shmem_pwrite(struct drm_i915_gem_object *obj,
 	u64 remain;
 	int ret;
 
-	ret = i915_gem_object_prepare_write(obj, &needs_clflush);
+	ret = i915_gem_object_lock_interruptible(obj, NULL);
 	if (ret)
 		return ret;
 
+	ret = i915_gem_object_prepare_write(obj, &needs_clflush);
+	if (ret) {
+		i915_gem_object_unlock(obj);
+		return ret;
+	}
+
 	fence = i915_gem_object_lock_fence(obj);
 	i915_gem_object_finish_access(obj);
+	i915_gem_object_unlock(obj);
+
 	if (!fence)
 		return -ENOMEM;
 
-- 
2.25.1

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[Intel-gfx] [PATCH 05/23] drm/i915: Parse command buffer earlier in eb_relocate(slow)

[Maarten Lankhorst]

We want to introduce backoff logic, but we need to lock the
pool object as well for command parsing. Because of this, we
will need backoff logic for the engine pool obj, move the batch
validation up slightly to eb_lookup_vmas, and the actual command
parsing in a separate function which can get called from execbuf
relocation fast and slowpath.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 .../gpu/drm/i915/gem/i915_gem_execbuffer.c    | 68 ++++++++++---------
 1 file changed, 37 insertions(+), 31 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index 55066dc0e1fe..1e9e89603e91 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -290,6 +290,8 @@ struct i915_execbuffer {
 	struct eb_vma_array *array;
 };
 
+static int eb_parse(struct i915_execbuffer *eb);
+
 static inline bool eb_use_cmdparser(const struct i915_execbuffer *eb)
 {
 	return intel_engine_requires_cmd_parser(eb->engine) ||
@@ -873,6 +875,7 @@ static struct i915_vma *eb_lookup_vma(struct i915_execbuffer *eb, u32 handle)
 
 static int eb_lookup_vmas(struct i915_execbuffer *eb)
 {
+	struct drm_i915_private *i915 = eb->i915;
 	unsigned int batch = eb_batch_index(eb);
 	unsigned int i;
 	int err = 0;
@@ -886,18 +889,37 @@ static int eb_lookup_vmas(struct i915_execbuffer *eb)
 		vma = eb_lookup_vma(eb, eb->exec[i].handle);
 		if (IS_ERR(vma)) {
 			err = PTR_ERR(vma);
-			break;
+			goto err;
 		}
 
 		err = eb_validate_vma(eb, &eb->exec[i], vma);
 		if (unlikely(err)) {
 			i915_vma_put(vma);
-			break;
+			goto err;
 		}
 
 		eb_add_vma(eb, i, batch, vma);
 	}
 
+	if (unlikely(eb->batch->flags & EXEC_OBJECT_WRITE)) {
+		drm_dbg(&i915->drm,
+			"Attempting to use self-modifying batch buffer\n");
+		return -EINVAL;
+	}
+
+	if (range_overflows_t(u64,
+			      eb->batch_start_offset, eb->batch_len,
+			      eb->batch->vma->size)) {
+		drm_dbg(&i915->drm, "Attempting to use out-of-bounds batch\n");
+		return -EINVAL;
+	}
+
+	if (eb->batch_len == 0)
+		eb->batch_len = eb->batch->vma->size - eb->batch_start_offset;
+
+	return 0;
+
+err:
 	eb->vma[i].vma = NULL;
 	return err;
 }
@@ -1727,7 +1749,7 @@ static int eb_prefault_relocations(const struct i915_execbuffer *eb)
 	return 0;
 }
 
-static noinline int eb_relocate_slow(struct i915_execbuffer *eb)
+static noinline int eb_relocate_parse_slow(struct i915_execbuffer *eb)
 {
 	bool have_copy = false;
 	struct eb_vma *ev;
@@ -1778,6 +1800,11 @@ static noinline int eb_relocate_slow(struct i915_execbuffer *eb)
 		}
 	}
 
+	/* as last step, parse the command buffer */
+	err = eb_parse(eb);
+	if (err)
+		goto err;
+
 	/*
 	 * Leave the user relocations as are, this is the painfully slow path,
 	 * and we want to avoid the complication of dropping the lock whilst
@@ -1810,7 +1837,7 @@ static noinline int eb_relocate_slow(struct i915_execbuffer *eb)
 	return err;
 }
 
-static int eb_relocate(struct i915_execbuffer *eb)
+static int eb_relocate_parse(struct i915_execbuffer *eb)
 {
 	int err;
 
@@ -1830,11 +1857,11 @@ static int eb_relocate(struct i915_execbuffer *eb)
 
 		list_for_each_entry(ev, &eb->relocs, reloc_link) {
 			if (eb_relocate_vma(eb, ev))
-				return eb_relocate_slow(eb);
+				return eb_relocate_parse_slow(eb);
 		}
 	}
 
-	return 0;
+	return eb_parse(eb);
 }
 
 static int eb_move_to_gpu(struct i915_execbuffer *eb)
@@ -2765,7 +2792,7 @@ i915_gem_do_execbuffer(struct drm_device *dev,
 	if (unlikely(err))
 		goto err_context;
 
-	err = eb_relocate(&eb);
+	err = eb_relocate_parse(&eb);
 	if (err) {
 		/*
 		 * If the user expects the execobject.offset and
@@ -2778,33 +2805,10 @@ i915_gem_do_execbuffer(struct drm_device *dev,
 		goto err_vma;
 	}
 
-	if (unlikely(eb.batch->flags & EXEC_OBJECT_WRITE)) {
-		drm_dbg(&i915->drm,
-			"Attempting to use self-modifying batch buffer\n");
-		err = -EINVAL;
-		goto err_vma;
-	}
-
-	if (range_overflows_t(u64,
-			      eb.batch_start_offset, eb.batch_len,
-			      eb.batch->vma->size)) {
-		drm_dbg(&i915->drm, "Attempting to use out-of-bounds batch\n");
-		err = -EINVAL;
-		goto err_vma;
-	}
-
-	if (eb.batch_len == 0)
-		eb.batch_len = eb.batch->vma->size - eb.batch_start_offset;
-
-	err = eb_parse(&eb);
-	if (err)
-		goto err_vma;
-
 	/*
 	 * snb/ivb/vlv conflate the "batch in ppgtt" bit with the "non-secure
 	 * batch" bit. Hence we need to pin secure batches into the global gtt.
 	 * hsw should have this fixed, but bdw mucks it up again. */
-	batch = eb.batch->vma;
 	if (eb.batch_flags & I915_DISPATCH_SECURE) {
 		struct i915_vma *vma;
 
@@ -2818,13 +2822,15 @@ i915_gem_do_execbuffer(struct drm_device *dev,
 		 *   fitting due to fragmentation.
 		 * So this is actually safe.
 		 */
-		vma = i915_gem_object_ggtt_pin(batch->obj, NULL, 0, 0, 0);
+		vma = i915_gem_object_ggtt_pin(eb.batch->vma->obj, NULL, 0, 0, 0);
 		if (IS_ERR(vma)) {
 			err = PTR_ERR(vma);
 			goto err_parse;
 		}
 
 		batch = vma;
+	} else {
+		batch = eb.batch->vma;
 	}
 
 	/* All GPU relocation batches must be submitted prior to the user rq */
-- 
2.25.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

[Intel-gfx] [PATCH 06/23] Revert "drm/i915/gem: Split eb_vma into its own allocation"

[Maarten Lankhorst]

This reverts commit 0f1dd02295f35dcdcbaafcbcbbec0753884ab974.
This conflicts with the ww mutex handling, which needs to drop
the references after gpu submission anyway, because otherwise we
may risk unlocking a BO after first freeing it.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 .../gpu/drm/i915/gem/i915_gem_execbuffer.c    | 131 ++++++++----------
 1 file changed, 58 insertions(+), 73 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index 1e9e89603e91..5e093488dd48 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -40,11 +40,6 @@ struct eb_vma {
 	u32 handle;
 };
 
-struct eb_vma_array {
-	struct kref kref;
-	struct eb_vma vma[];
-};
-
 enum {
 	FORCE_CPU_RELOC = 1,
 	FORCE_GTT_RELOC,
@@ -57,6 +52,7 @@ enum {
 #define __EXEC_OBJECT_NEEDS_MAP		BIT(29)
 #define __EXEC_OBJECT_NEEDS_BIAS	BIT(28)
 #define __EXEC_OBJECT_INTERNAL_FLAGS	(~0u << 28) /* all of the above */
+#define __EXEC_OBJECT_RESERVED (__EXEC_OBJECT_HAS_PIN | __EXEC_OBJECT_HAS_FENCE)
 
 #define __EXEC_HAS_RELOC	BIT(31)
 #define __EXEC_INTERNAL_FLAGS	(~0u << 31)
@@ -287,7 +283,6 @@ struct i915_execbuffer {
 	 */
 	int lut_size;
 	struct hlist_head *buckets; /** ht for relocation handles */
-	struct eb_vma_array *array;
 };
 
 static int eb_parse(struct i915_execbuffer *eb);
@@ -299,62 +294,8 @@ static inline bool eb_use_cmdparser(const struct i915_execbuffer *eb)
 		 eb->args->batch_len);
 }
 
-static struct eb_vma_array *eb_vma_array_create(unsigned int count)
-{
-	struct eb_vma_array *arr;
-
-	arr = kvmalloc(struct_size(arr, vma, count), GFP_KERNEL | __GFP_NOWARN);
-	if (!arr)
-		return NULL;
-
-	kref_init(&arr->kref);
-	arr->vma[0].vma = NULL;
-
-	return arr;
-}
-
-static inline void eb_unreserve_vma(struct eb_vma *ev)
-{
-	struct i915_vma *vma = ev->vma;
-
-	if (unlikely(ev->flags & __EXEC_OBJECT_HAS_FENCE))
-		__i915_vma_unpin_fence(vma);
-
-	if (ev->flags & __EXEC_OBJECT_HAS_PIN)
-		__i915_vma_unpin(vma);
-
-	ev->flags &= ~(__EXEC_OBJECT_HAS_PIN |
-		       __EXEC_OBJECT_HAS_FENCE);
-}
-
-static void eb_vma_array_destroy(struct kref *kref)
-{
-	struct eb_vma_array *arr = container_of(kref, typeof(*arr), kref);
-	struct eb_vma *ev = arr->vma;
-
-	while (ev->vma) {
-		eb_unreserve_vma(ev);
-		i915_vma_put(ev->vma);
-		ev++;
-	}
-
-	kvfree(arr);
-}
-
-static void eb_vma_array_put(struct eb_vma_array *arr)
-{
-	kref_put(&arr->kref, eb_vma_array_destroy);
-}
-
 static int eb_create(struct i915_execbuffer *eb)
 {
-	/* Allocate an extra slot for use by the command parser + sentinel */
-	eb->array = eb_vma_array_create(eb->buffer_count + 2);
-	if (!eb->array)
-		return -ENOMEM;
-
-	eb->vma = eb->array->vma;
-
 	if (!(eb->args->flags & I915_EXEC_HANDLE_LUT)) {
 		unsigned int size = 1 + ilog2(eb->buffer_count);
 
@@ -388,10 +329,8 @@ static int eb_create(struct i915_execbuffer *eb)
 				break;
 		} while (--size);
 
-		if (unlikely(!size)) {
-			eb_vma_array_put(eb->array);
+		if (unlikely(!size))
 			return -ENOMEM;
-		}
 
 		eb->lut_size = size;
 	} else {
@@ -502,6 +441,26 @@ eb_pin_vma(struct i915_execbuffer *eb,
 	return !eb_vma_misplaced(entry, vma, ev->flags);
 }
 
+static inline void __eb_unreserve_vma(struct i915_vma *vma, unsigned int flags)
+{
+	GEM_BUG_ON(!(flags & __EXEC_OBJECT_HAS_PIN));
+
+	if (unlikely(flags & __EXEC_OBJECT_HAS_FENCE))
+		__i915_vma_unpin_fence(vma);
+
+	__i915_vma_unpin(vma);
+}
+
+static inline void
+eb_unreserve_vma(struct eb_vma *ev)
+{
+	if (!(ev->flags & __EXEC_OBJECT_HAS_PIN))
+		return;
+
+	__eb_unreserve_vma(ev->vma, ev->flags);
+	ev->flags &= ~__EXEC_OBJECT_RESERVED;
+}
+
 static int
 eb_validate_vma(struct i915_execbuffer *eb,
 		struct drm_i915_gem_exec_object2 *entry,
@@ -944,13 +903,31 @@ eb_get_vma(const struct i915_execbuffer *eb, unsigned long handle)
 	}
 }
 
+static void eb_release_vmas(const struct i915_execbuffer *eb)
+{
+	const unsigned int count = eb->buffer_count;
+	unsigned int i;
+
+	for (i = 0; i < count; i++) {
+		struct eb_vma *ev = &eb->vma[i];
+		struct i915_vma *vma = ev->vma;
+
+		if (!vma)
+			break;
+
+		eb->vma[i].vma = NULL;
+
+		if (ev->flags & __EXEC_OBJECT_HAS_PIN)
+			__eb_unreserve_vma(vma, ev->flags);
+
+		i915_vma_put(vma);
+	}
+}
+
 static void eb_destroy(const struct i915_execbuffer *eb)
 {
 	GEM_BUG_ON(eb->reloc_cache.rq);
 
-	if (eb->array)
-		eb_vma_array_put(eb->array);
-
 	if (eb->lut_size > 0)
 		kfree(eb->buckets);
 }
@@ -1941,15 +1918,19 @@ static int eb_move_to_gpu(struct i915_execbuffer *eb)
 			err = i915_vma_move_to_active(vma, eb->request, flags);
 
 		i915_vma_unlock(vma);
-		eb_unreserve_vma(ev);
+
+		__eb_unreserve_vma(vma, flags);
+		i915_vma_put(vma);
+
+		ev->vma = NULL;
 	}
 	ww_acquire_fini(&acquire);
 
-	eb_vma_array_put(fetch_and_zero(&eb->array));
-
 	if (unlikely(err))
 		goto err_skip;
 
+	eb->exec = NULL;
+
 	/* Unconditionally flush any chipset caches (for streaming writes). */
 	intel_gt_chipset_flush(eb->engine->gt);
 	return 0;
@@ -2201,7 +2182,6 @@ static int eb_parse(struct i915_execbuffer *eb)
 	eb->vma[eb->buffer_count].vma = i915_vma_get(shadow);
 	eb->vma[eb->buffer_count].flags = __EXEC_OBJECT_HAS_PIN;
 	eb->batch = &eb->vma[eb->buffer_count++];
-	eb->vma[eb->buffer_count].vma = NULL;
 
 	eb->trampoline = trampoline;
 	eb->batch_start_offset = 0;
@@ -2725,6 +2705,8 @@ i915_gem_do_execbuffer(struct drm_device *dev,
 		args->flags |= __EXEC_HAS_RELOC;
 
 	eb.exec = exec;
+	eb.vma = (struct eb_vma *)(exec + args->buffer_count + 1);
+	eb.vma[0].vma = NULL;
 
 	eb.invalid_flags = __EXEC_OBJECT_UNKNOWN_FLAGS;
 	reloc_cache_init(&eb.reloc_cache, eb.i915);
@@ -2910,6 +2892,8 @@ i915_gem_do_execbuffer(struct drm_device *dev,
 	if (batch->private)
 		intel_engine_pool_put(batch->private);
 err_vma:
+	if (eb.exec)
+		eb_release_vmas(&eb);
 	if (eb.trampoline)
 		i915_vma_unpin(eb.trampoline);
 	eb_unpin_engine(&eb);
@@ -2929,7 +2913,7 @@ i915_gem_do_execbuffer(struct drm_device *dev,
 
 static size_t eb_element_size(void)
 {
-	return sizeof(struct drm_i915_gem_exec_object2);
+	return sizeof(struct drm_i915_gem_exec_object2) + sizeof(struct eb_vma);
 }
 
 static bool check_buffer_count(size_t count)
@@ -2985,7 +2969,7 @@ i915_gem_execbuffer_ioctl(struct drm_device *dev, void *data,
 	/* Copy in the exec list from userland */
 	exec_list = kvmalloc_array(count, sizeof(*exec_list),
 				   __GFP_NOWARN | GFP_KERNEL);
-	exec2_list = kvmalloc_array(count, eb_element_size(),
+	exec2_list = kvmalloc_array(count + 1, eb_element_size(),
 				    __GFP_NOWARN | GFP_KERNEL);
 	if (exec_list == NULL || exec2_list == NULL) {
 		drm_dbg(&i915->drm,
@@ -3063,7 +3047,8 @@ i915_gem_execbuffer2_ioctl(struct drm_device *dev, void *data,
 	if (err)
 		return err;
 
-	exec2_list = kvmalloc_array(count, eb_element_size(),
+	/* Allocate an extra slot for use by the command parser */
+	exec2_list = kvmalloc_array(count + 1, eb_element_size(),
 				    __GFP_NOWARN | GFP_KERNEL);
 	if (exec2_list == NULL) {
 		drm_dbg(&i915->drm, "Failed to allocate exec list for %zd buffers\n",
-- 
2.25.1

_______________________________________________
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https://lists.freedesktop.org/mailman/listinfo/intel-gfx

[Intel-gfx] [PATCH 07/23] drm/i915: Use per object locking in execbuf, v7.

[Maarten Lankhorst]

Now that we changed execbuf submission slightly to allow us to do all
pinning in one place, we can now simply add ww versions on top of
struct_mutex. All we have to do is a separate path for -EDEADLK
handling, which needs to unpin all gem bo's before dropping the lock,
then starting over.

This finally allows us to do parallel submission, but because not
all of the pinning code uses the ww ctx yet, we cannot completely
drop struct_mutex yet.

Changes since v1:
- Keep struct_mutex for now. :(
Changes since v2:
- Make sure we always lock the ww context in slowpath.
Changes since v3:
- Don't call __eb_unreserve_vma in eb_move_to_gpu now; this can be
  done on normal unlock path.
- Unconditionally release vmas and context.
Changes since v4:
- Rebased on top of struct_mutex reduction.
Changes since v5:
- Remove training wheels.
Changes since v6:
- Fix accidentally broken -ENOSPC handling.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 .../gpu/drm/i915/gem/i915_gem_execbuffer.c    | 273 ++++++++++--------
 1 file changed, 148 insertions(+), 125 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index 5e093488dd48..dd3aff4ac3fb 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -249,6 +249,8 @@ struct i915_execbuffer {
 	/** list of vma that have execobj.relocation_count */
 	struct list_head relocs;
 
+	struct i915_gem_ww_ctx ww;
+
 	/**
 	 * Track the most recently used object for relocations, as we
 	 * frequently have to perform multiple relocations within the same
@@ -441,24 +443,18 @@ eb_pin_vma(struct i915_execbuffer *eb,
 	return !eb_vma_misplaced(entry, vma, ev->flags);
 }
 
-static inline void __eb_unreserve_vma(struct i915_vma *vma, unsigned int flags)
-{
-	GEM_BUG_ON(!(flags & __EXEC_OBJECT_HAS_PIN));
-
-	if (unlikely(flags & __EXEC_OBJECT_HAS_FENCE))
-		__i915_vma_unpin_fence(vma);
-
-	__i915_vma_unpin(vma);
-}
-
 static inline void
 eb_unreserve_vma(struct eb_vma *ev)
 {
 	if (!(ev->flags & __EXEC_OBJECT_HAS_PIN))
 		return;
 
-	__eb_unreserve_vma(ev->vma, ev->flags);
 	ev->flags &= ~__EXEC_OBJECT_RESERVED;
+
+	if (unlikely(ev->flags & __EXEC_OBJECT_HAS_FENCE))
+		__i915_vma_unpin_fence(ev->vma);
+
+	__i915_vma_unpin(ev->vma);
 }
 
 static int
@@ -552,16 +548,6 @@ eb_add_vma(struct i915_execbuffer *eb,
 
 		eb->batch = ev;
 	}
-
-	if (eb_pin_vma(eb, entry, ev)) {
-		if (entry->offset != vma->node.start) {
-			entry->offset = vma->node.start | UPDATE;
-			eb->args->flags |= __EXEC_HAS_RELOC;
-		}
-	} else {
-		eb_unreserve_vma(ev);
-		list_add_tail(&ev->bind_link, &eb->unbound);
-	}
 }
 
 static inline int use_cpu_reloc(const struct reloc_cache *cache,
@@ -646,10 +632,6 @@ static int eb_reserve(struct i915_execbuffer *eb)
 	 * This avoid unnecessary unbinding of later objects in order to make
 	 * room for the earlier objects *unless* we need to defragment.
 	 */
-
-	if (mutex_lock_interruptible(&eb->i915->drm.struct_mutex))
-		return -EINTR;
-
 	pass = 0;
 	do {
 		list_for_each_entry(ev, &eb->unbound, bind_link) {
@@ -657,8 +639,8 @@ static int eb_reserve(struct i915_execbuffer *eb)
 			if (err)
 				break;
 		}
-		if (!(err == -ENOSPC || err == -EAGAIN))
-			break;
+		if (err != -ENOSPC)
+			return err;
 
 		/* Resort *all* the objects into priority order */
 		INIT_LIST_HEAD(&eb->unbound);
@@ -688,13 +670,6 @@ static int eb_reserve(struct i915_execbuffer *eb)
 		}
 		list_splice_tail(&last, &eb->unbound);
 
-		if (err == -EAGAIN) {
-			mutex_unlock(&eb->i915->drm.struct_mutex);
-			flush_workqueue(eb->i915->mm.userptr_wq);
-			mutex_lock(&eb->i915->drm.struct_mutex);
-			continue;
-		}
-
 		switch (pass++) {
 		case 0:
 			break;
@@ -705,20 +680,15 @@ static int eb_reserve(struct i915_execbuffer *eb)
 			err = i915_gem_evict_vm(eb->context->vm);
 			mutex_unlock(&eb->context->vm->mutex);
 			if (err)
-				goto unlock;
+				return err;
 			break;
 
 		default:
-			err = -ENOSPC;
-			goto unlock;
+			return -ENOSPC;
 		}
 
 		pin_flags = PIN_USER;
 	} while (1);
-
-unlock:
-	mutex_unlock(&eb->i915->drm.struct_mutex);
-	return err;
 }
 
 static unsigned int eb_batch_index(const struct i915_execbuffer *eb)
@@ -840,7 +810,6 @@ static int eb_lookup_vmas(struct i915_execbuffer *eb)
 	int err = 0;
 
 	INIT_LIST_HEAD(&eb->relocs);
-	INIT_LIST_HEAD(&eb->unbound);
 
 	for (i = 0; i < eb->buffer_count; i++) {
 		struct i915_vma *vma;
@@ -883,6 +852,48 @@ static int eb_lookup_vmas(struct i915_execbuffer *eb)
 	return err;
 }
 
+static int eb_validate_vmas(struct i915_execbuffer *eb)
+{
+	unsigned int i;
+	int err;
+
+	INIT_LIST_HEAD(&eb->unbound);
+
+	for (i = 0; i < eb->buffer_count; i++) {
+		struct drm_i915_gem_exec_object2 *entry = &eb->exec[i];
+		struct eb_vma *ev = &eb->vma[i];
+		struct i915_vma *vma = ev->vma;
+
+		err = i915_gem_object_lock(vma->obj, &eb->ww);
+		if (err)
+			return err;
+
+		if (eb_pin_vma(eb, entry, ev)) {
+			if (entry->offset != vma->node.start) {
+				entry->offset = vma->node.start | UPDATE;
+				eb->args->flags |= __EXEC_HAS_RELOC;
+			}
+		} else {
+			eb_unreserve_vma(ev);
+
+			list_add_tail(&ev->bind_link, &eb->unbound);
+			if (drm_mm_node_allocated(&vma->node)) {
+				err = i915_vma_unbind(vma);
+				if (err)
+					return err;
+			}
+		}
+
+		GEM_BUG_ON(drm_mm_node_allocated(&vma->node) &&
+			   eb_vma_misplaced(&eb->exec[i], vma, ev->flags));
+	}
+
+	if (!list_empty(&eb->unbound))
+		return eb_reserve(eb);
+
+	return 0;
+}
+
 static struct eb_vma *
 eb_get_vma(const struct i915_execbuffer *eb, unsigned long handle)
 {
@@ -903,7 +914,7 @@ eb_get_vma(const struct i915_execbuffer *eb, unsigned long handle)
 	}
 }
 
-static void eb_release_vmas(const struct i915_execbuffer *eb)
+static void eb_release_vmas(const struct i915_execbuffer *eb, bool final)
 {
 	const unsigned int count = eb->buffer_count;
 	unsigned int i;
@@ -915,12 +926,10 @@ static void eb_release_vmas(const struct i915_execbuffer *eb)
 		if (!vma)
 			break;
 
-		eb->vma[i].vma = NULL;
-
-		if (ev->flags & __EXEC_OBJECT_HAS_PIN)
-			__eb_unreserve_vma(vma, ev->flags);
+		eb_unreserve_vma(ev);
 
-		i915_vma_put(vma);
+		if (final)
+			i915_vma_put(vma);
 	}
 }
 
@@ -1007,7 +1016,6 @@ static void reloc_cache_reset(struct reloc_cache *cache)
 
 		kunmap_atomic(vaddr);
 		i915_gem_object_finish_access(obj);
-		i915_gem_object_unlock(obj);
 	} else {
 		struct i915_ggtt *ggtt = cache_to_ggtt(cache);
 
@@ -1042,15 +1050,9 @@ static void *reloc_kmap(struct drm_i915_gem_object *obj,
 		unsigned int flushes;
 		int err;
 
-		err = i915_gem_object_lock_interruptible(obj, NULL);
-		if (err)
-			return ERR_PTR(err);
-
 		err = i915_gem_object_prepare_write(obj, &flushes);
-		if (err) {
-			i915_gem_object_unlock(obj);
+		if (err)
 			return ERR_PTR(err);
-		}
 
 		BUILD_BUG_ON(KMAP & CLFLUSH_FLAGS);
 		BUILD_BUG_ON((KMAP | CLFLUSH_FLAGS) & PAGE_MASK);
@@ -1089,9 +1091,7 @@ static void *reloc_iomap(struct drm_i915_gem_object *obj,
 		if (use_cpu_reloc(cache, obj))
 			return NULL;
 
-		i915_gem_object_lock(obj, NULL);
 		err = i915_gem_object_set_to_gtt_domain(obj, true);
-		i915_gem_object_unlock(obj);
 		if (err)
 			return ERR_PTR(err);
 
@@ -1180,7 +1180,7 @@ static int reloc_move_to_gpu(struct i915_request *rq, struct i915_vma *vma)
 	struct drm_i915_gem_object *obj = vma->obj;
 	int err;
 
-	i915_vma_lock(vma);
+	assert_vma_held(vma);
 
 	if (obj->cache_dirty & ~obj->cache_coherent)
 		i915_gem_clflush_object(obj, 0);
@@ -1190,8 +1190,6 @@ static int reloc_move_to_gpu(struct i915_request *rq, struct i915_vma *vma)
 	if (err == 0)
 		err = i915_vma_move_to_active(vma, rq, EXEC_OBJECT_WRITE);
 
-	i915_vma_unlock(vma);
-
 	return err;
 }
 
@@ -1210,6 +1208,10 @@ static int __reloc_gpu_alloc(struct i915_execbuffer *eb,
 	if (IS_ERR(pool))
 		return PTR_ERR(pool);
 
+	err = i915_gem_object_lock(pool->obj, &eb->ww);
+	if (err)
+		goto out_pool;
+
 	cmd = i915_gem_object_pin_map(pool->obj,
 				      cache->has_llc ?
 				      I915_MAP_FORCE_WB :
@@ -1249,11 +1251,10 @@ static int __reloc_gpu_alloc(struct i915_execbuffer *eb,
 	if (err)
 		goto skip_request;
 
-	i915_vma_lock(batch);
+	assert_vma_held(batch);
 	err = i915_request_await_object(rq, batch->obj, false);
 	if (err == 0)
 		err = i915_vma_move_to_active(batch, rq, 0);
-	i915_vma_unlock(batch);
 	if (err)
 		goto skip_request;
 
@@ -1334,7 +1335,9 @@ relocate_entry(struct i915_vma *vma,
 			len = 3;
 
 		batch = reloc_gpu(eb, vma, len);
-		if (IS_ERR(batch))
+		if (batch == ERR_PTR(-EDEADLK))
+			return (s64)-EDEADLK;
+		else if (IS_ERR(batch))
 			goto repeat;
 
 		addr = gen8_canonical_addr(vma->node.start + offset);
@@ -1738,6 +1741,10 @@ static noinline int eb_relocate_parse_slow(struct i915_execbuffer *eb)
 		goto out;
 	}
 
+	/* We may process another execbuffer during the unlock... */
+	eb_release_vmas(eb, false);
+	i915_gem_ww_ctx_fini(&eb->ww);
+
 	/*
 	 * We take 3 passes through the slowpatch.
 	 *
@@ -1760,15 +1767,29 @@ static noinline int eb_relocate_parse_slow(struct i915_execbuffer *eb)
 		cond_resched();
 		err = 0;
 	}
+
+	flush_workqueue(eb->i915->mm.userptr_wq);
+
+	i915_gem_ww_ctx_init(&eb->ww, true);
 	if (err)
 		goto out;
 
+	/* reacquire the objects */
+repeat_validate:
+	err = eb_validate_vmas(eb);
+	if (err)
+		goto err;
+
+	GEM_BUG_ON(!eb->batch);
+
 	list_for_each_entry(ev, &eb->relocs, reloc_link) {
 		if (!have_copy) {
 			pagefault_disable();
 			err = eb_relocate_vma(eb, ev);
 			pagefault_enable();
-			if (err)
+			if (err == -EDEADLK)
+				goto err;
+			else if (err)
 				goto repeat;
 		} else {
 			err = eb_relocate_vma_slow(eb, ev);
@@ -1790,6 +1811,13 @@ static noinline int eb_relocate_parse_slow(struct i915_execbuffer *eb)
 	 */
 
 err:
+	if (err == -EDEADLK) {
+		eb_release_vmas(eb, false);
+		err = i915_gem_ww_ctx_backoff(&eb->ww);
+		if (!err)
+			goto repeat_validate;
+	}
+
 	if (err == -EAGAIN)
 		goto repeat;
 
@@ -1818,61 +1846,59 @@ static int eb_relocate_parse(struct i915_execbuffer *eb)
 {
 	int err;
 
-	err = eb_lookup_vmas(eb);
-	if (err)
-		return err;
-
-	if (!list_empty(&eb->unbound)) {
-		err = eb_reserve(eb);
-		if (err)
-			return err;
-	}
+retry:
+	err = eb_validate_vmas(eb);
+	if (err == -EAGAIN)
+		goto slow;
+	else if (err)
+		goto err;
 
 	/* The objects are in their final locations, apply the relocations. */
 	if (eb->args->flags & __EXEC_HAS_RELOC) {
 		struct eb_vma *ev;
 
 		list_for_each_entry(ev, &eb->relocs, reloc_link) {
-			if (eb_relocate_vma(eb, ev))
-				return eb_relocate_parse_slow(eb);
+			err = eb_relocate_vma(eb, ev);
+			if (err == -EDEADLK)
+				goto err;
+			else if (err)
+				goto slow;
 		}
 	}
 
-	return eb_parse(eb);
+	err = eb_parse(eb);
+
+err:
+	if (err == -EDEADLK) {
+		eb_release_vmas(eb, false);
+		err = i915_gem_ww_ctx_backoff(&eb->ww);
+		if (!err)
+			goto retry;
+	}
+
+	return err;
+
+slow:
+	err = eb_relocate_parse_slow(eb);
+	if (err)
+		/*
+		 * If the user expects the execobject.offset and
+		 * reloc.presumed_offset to be an exact match,
+		 * as for using NO_RELOC, then we cannot update
+		 * the execobject.offset until we have completed
+		 * relocation.
+		 */
+		eb->args->flags &= ~__EXEC_HAS_RELOC;
+
+	return err;
 }
 
 static int eb_move_to_gpu(struct i915_execbuffer *eb)
 {
 	const unsigned int count = eb->buffer_count;
-	struct ww_acquire_ctx acquire;
-	unsigned int i;
+	unsigned int i = count;
 	int err = 0;
 
-	ww_acquire_init(&acquire, &reservation_ww_class);
-
-	for (i = 0; i < count; i++) {
-		struct eb_vma *ev = &eb->vma[i];
-		struct i915_vma *vma = ev->vma;
-
-		err = ww_mutex_lock_interruptible(&vma->resv->lock, &acquire);
-		if (err == -EDEADLK) {
-			GEM_BUG_ON(i == 0);
-			do {
-				int j = i - 1;
-
-				ww_mutex_unlock(&eb->vma[j].vma->resv->lock);
-
-				swap(eb->vma[i],  eb->vma[j]);
-			} while (--i);
-
-			err = ww_mutex_lock_slow_interruptible(&vma->resv->lock,
-							       &acquire);
-		}
-		if (err)
-			break;
-	}
-	ww_acquire_done(&acquire);
-
 	while (i--) {
 		struct eb_vma *ev = &eb->vma[i];
 		struct i915_vma *vma = ev->vma;
@@ -1916,21 +1942,11 @@ static int eb_move_to_gpu(struct i915_execbuffer *eb)
 
 		if (err == 0)
 			err = i915_vma_move_to_active(vma, eb->request, flags);
-
-		i915_vma_unlock(vma);
-
-		__eb_unreserve_vma(vma, flags);
-		i915_vma_put(vma);
-
-		ev->vma = NULL;
 	}
-	ww_acquire_fini(&acquire);
 
 	if (unlikely(err))
 		goto err_skip;
 
-	eb->exec = NULL;
-
 	/* Unconditionally flush any chipset caches (for streaming writes). */
 	intel_gt_chipset_flush(eb->engine->gt);
 	return 0;
@@ -2080,10 +2096,6 @@ static int eb_parse_pipeline(struct i915_execbuffer *eb,
 	pw->shadow = shadow;
 	pw->trampoline = trampoline;
 
-	err = dma_resv_lock_interruptible(pw->batch->resv, NULL);
-	if (err)
-		goto err_trampoline;
-
 	err = dma_resv_reserve_shared(pw->batch->resv, 1);
 	if (err)
 		goto err_batch_unlock;
@@ -2098,19 +2110,14 @@ static int eb_parse_pipeline(struct i915_execbuffer *eb,
 	/* Keep the batch alive and unwritten as we parse */
 	dma_resv_add_shared_fence(pw->batch->resv, &pw->base.dma);
 
-	dma_resv_unlock(pw->batch->resv);
-
 	/* Force execution to wait for completion of the parser */
-	dma_resv_lock(shadow->resv, NULL);
 	dma_resv_add_excl_fence(shadow->resv, &pw->base.dma);
-	dma_resv_unlock(shadow->resv);
 
 	dma_fence_work_commit_imm(&pw->base);
 	return 0;
 
 err_batch_unlock:
 	dma_resv_unlock(pw->batch->resv);
-err_trampoline:
 	if (trampoline)
 		i915_active_release(&trampoline->active);
 err_shadow:
@@ -2152,6 +2159,10 @@ static int eb_parse(struct i915_execbuffer *eb)
 	if (IS_ERR(pool))
 		return PTR_ERR(pool);
 
+	err = i915_gem_object_lock(pool->obj, &eb->ww);
+	if (err)
+		goto err;
+
 	shadow = shadow_batch_pin(pool->obj, eb->context->vm, PIN_USER);
 	if (IS_ERR(shadow)) {
 		err = PTR_ERR(shadow);
@@ -2774,6 +2785,14 @@ i915_gem_do_execbuffer(struct drm_device *dev,
 	if (unlikely(err))
 		goto err_context;
 
+	err = eb_lookup_vmas(&eb);
+	if (err) {
+		eb_release_vmas(&eb, true);
+		goto err_engine;
+	}
+
+	i915_gem_ww_ctx_init(&eb.ww, true);
+
 	err = eb_relocate_parse(&eb);
 	if (err) {
 		/*
@@ -2787,6 +2806,8 @@ i915_gem_do_execbuffer(struct drm_device *dev,
 		goto err_vma;
 	}
 
+	ww_acquire_done(&eb.ww.ctx);
+
 	/*
 	 * snb/ivb/vlv conflate the "batch in ppgtt" bit with the "non-secure
 	 * batch" bit. Hence we need to pin secure batches into the global gtt.
@@ -2892,10 +2913,12 @@ i915_gem_do_execbuffer(struct drm_device *dev,
 	if (batch->private)
 		intel_engine_pool_put(batch->private);
 err_vma:
-	if (eb.exec)
-		eb_release_vmas(&eb);
+	eb_release_vmas(&eb, true);
 	if (eb.trampoline)
 		i915_vma_unpin(eb.trampoline);
+	WARN_ON(err == -EDEADLK);
+	i915_gem_ww_ctx_fini(&eb.ww);
+err_engine:
 	eb_unpin_engine(&eb);
 err_context:
 	i915_gem_context_put(eb.gem_context);
-- 
2.25.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

[Intel-gfx] [PATCH 08/23] drm/i915: Use ww locking in intel_renderstate.

[Maarten Lankhorst]

We want to start using ww locking in intel_context_pin, for this
we need to lock multiple objects, and the single i915_gem_object_lock
is not enough.

Convert to using ww-waiting, and make sure we always pin intel_context_state,
even if we don't have a renderstate object.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 drivers/gpu/drm/i915/gt/intel_gt.c          | 21 +++---
 drivers/gpu/drm/i915/gt/intel_renderstate.c | 79 ++++++++++++++-------
 drivers/gpu/drm/i915/gt/intel_renderstate.h |  9 ++-
 3 files changed, 72 insertions(+), 37 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c
index 6eae4c791007..c11e89472ad8 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt.c
@@ -406,21 +406,20 @@ static int __engines_record_defaults(struct intel_gt *gt)
 		/* We must be able to switch to something! */
 		GEM_BUG_ON(!engine->kernel_context);
 
-		err = intel_renderstate_init(&so, engine);
-		if (err)
-			goto out;
-
 		ce = intel_context_create(engine);
 		if (IS_ERR(ce)) {
 			err = PTR_ERR(ce);
 			goto out;
 		}
 
-		rq = intel_context_create_request(ce);
+		err = intel_renderstate_init(&so, ce);
+		if (err)
+			goto err;
+
+		rq = i915_request_create(ce);
 		if (IS_ERR(rq)) {
 			err = PTR_ERR(rq);
-			intel_context_put(ce);
-			goto out;
+			goto err_fini;
 		}
 
 		err = intel_engine_emit_ctx_wa(rq);
@@ -434,9 +433,13 @@ static int __engines_record_defaults(struct intel_gt *gt)
 err_rq:
 		requests[id] = i915_request_get(rq);
 		i915_request_add(rq);
-		intel_renderstate_fini(&so);
-		if (err)
+err_fini:
+		intel_renderstate_fini(&so, ce);
+err:
+		if (err) {
+			intel_context_put(ce);
 			goto out;
+		}
 	}
 
 	/* Flush the default context image to memory, and enable powersaving. */
diff --git a/drivers/gpu/drm/i915/gt/intel_renderstate.c b/drivers/gpu/drm/i915/gt/intel_renderstate.c
index ca533d98d14d..5e980642e479 100644
--- a/drivers/gpu/drm/i915/gt/intel_renderstate.c
+++ b/drivers/gpu/drm/i915/gt/intel_renderstate.c
@@ -27,6 +27,7 @@
 
 #include "i915_drv.h"
 #include "intel_renderstate.h"
+#include "gt/intel_context.h"
 #include "intel_ring.h"
 
 static const struct intel_renderstate_rodata *
@@ -74,10 +75,9 @@ static int render_state_setup(struct intel_renderstate *so,
 	u32 *d;
 	int ret;
 
-	i915_gem_object_lock(so->vma->obj, NULL);
 	ret = i915_gem_object_prepare_write(so->vma->obj, &needs_clflush);
 	if (ret)
-		goto out_unlock;
+		return ret;
 
 	d = kmap_atomic(i915_gem_object_get_dirty_page(so->vma->obj, 0));
 
@@ -158,8 +158,6 @@ static int render_state_setup(struct intel_renderstate *so,
 	ret = 0;
 out:
 	i915_gem_object_finish_access(so->vma->obj);
-out_unlock:
-	i915_gem_object_unlock(so->vma->obj);
 	return ret;
 
 err:
@@ -171,33 +169,47 @@ static int render_state_setup(struct intel_renderstate *so,
 #undef OUT_BATCH
 
 int intel_renderstate_init(struct intel_renderstate *so,
-			   struct intel_engine_cs *engine)
+			   struct intel_context *ce)
 {
-	struct drm_i915_gem_object *obj;
+	struct intel_engine_cs *engine = ce->engine;
+	struct drm_i915_gem_object *obj = NULL;
 	int err;
 
 	memset(so, 0, sizeof(*so));
 
 	so->rodata = render_state_get_rodata(engine);
-	if (!so->rodata)
-		return 0;
+	if (so->rodata) {
+		if (so->rodata->batch_items * 4 > PAGE_SIZE)
+			return -EINVAL;
+
+		obj = i915_gem_object_create_internal(engine->i915, PAGE_SIZE);
+		if (IS_ERR(obj))
+			return PTR_ERR(obj);
+
+		so->vma = i915_vma_instance(obj, &engine->gt->ggtt->vm, NULL);
+		if (IS_ERR(so->vma)) {
+			err = PTR_ERR(so->vma);
+			goto err_obj;
+		}
+	}
 
-	if (so->rodata->batch_items * 4 > PAGE_SIZE)
-		return -EINVAL;
+	i915_gem_ww_ctx_init(&so->ww, true);
+retry:
+	err = intel_context_pin(ce);
+	if (err)
+		goto err_fini;
 
-	obj = i915_gem_object_create_internal(engine->i915, PAGE_SIZE);
-	if (IS_ERR(obj))
-		return PTR_ERR(obj);
+	/* return early if there's nothing to setup */
+	if (!err && !so->rodata)
+		return 0;
 
-	so->vma = i915_vma_instance(obj, &engine->gt->ggtt->vm, NULL);
-	if (IS_ERR(so->vma)) {
-		err = PTR_ERR(so->vma);
-		goto err_obj;
-	}
+	err = i915_gem_object_lock(so->vma->obj, &so->ww);
+	if (err)
+		goto err_context;
 
 	err = i915_vma_pin(so->vma, 0, 0, PIN_GLOBAL | PIN_HIGH);
 	if (err)
-		goto err_vma;
+		goto err_context;
 
 	err = render_state_setup(so, engine->i915);
 	if (err)
@@ -207,10 +219,19 @@ int intel_renderstate_init(struct intel_renderstate *so,
 
 err_unpin:
 	i915_vma_unpin(so->vma);
-err_vma:
+err_context:
+	intel_context_unpin(ce);
+err_fini:
+	if (err == -EDEADLK) {
+		err = i915_gem_ww_ctx_backoff(&so->ww);
+		if (!err)
+			goto retry;
+	}
+	i915_gem_ww_ctx_fini(&so->ww);
 	i915_vma_close(so->vma);
 err_obj:
-	i915_gem_object_put(obj);
+	if (obj)
+		i915_gem_object_put(obj);
 	so->vma = NULL;
 	return err;
 }
@@ -238,16 +259,24 @@ int intel_renderstate_emit(struct intel_renderstate *so,
 			return err;
 	}
 
-	i915_vma_lock(so->vma);
 	err = i915_request_await_object(rq, so->vma->obj, false);
 	if (err == 0)
 		err = i915_vma_move_to_active(so->vma, rq, 0);
-	i915_vma_unlock(so->vma);
 
 	return err;
 }
 
-void intel_renderstate_fini(struct intel_renderstate *so)
+void intel_renderstate_fini(struct intel_renderstate *so,
+			    struct intel_context *ce)
 {
-	i915_vma_unpin_and_release(&so->vma, 0);
+	if (so->vma) {
+		i915_vma_unpin(so->vma);
+		i915_vma_close(so->vma);
+	}
+
+	intel_context_unpin(ce);
+	i915_gem_ww_ctx_fini(&so->ww);
+
+	if (so->vma)
+		i915_gem_object_put(so->vma->obj);
 }
diff --git a/drivers/gpu/drm/i915/gt/intel_renderstate.h b/drivers/gpu/drm/i915/gt/intel_renderstate.h
index 5700be69a05a..713aa1e86c80 100644
--- a/drivers/gpu/drm/i915/gt/intel_renderstate.h
+++ b/drivers/gpu/drm/i915/gt/intel_renderstate.h
@@ -25,9 +25,10 @@
 #define _INTEL_RENDERSTATE_H_
 
 #include <linux/types.h>
+#include "i915_gem.h"
 
 struct i915_request;
-struct intel_engine_cs;
+struct intel_context;
 struct i915_vma;
 
 struct intel_renderstate_rodata {
@@ -49,6 +50,7 @@ extern const struct intel_renderstate_rodata gen8_null_state;
 extern const struct intel_renderstate_rodata gen9_null_state;
 
 struct intel_renderstate {
+	struct i915_gem_ww_ctx ww;
 	const struct intel_renderstate_rodata *rodata;
 	struct i915_vma *vma;
 	u32 batch_offset;
@@ -58,9 +60,10 @@ struct intel_renderstate {
 };
 
 int intel_renderstate_init(struct intel_renderstate *so,
-			   struct intel_engine_cs *engine);
+			   struct intel_context *ce);
 int intel_renderstate_emit(struct intel_renderstate *so,
 			   struct i915_request *rq);
-void intel_renderstate_fini(struct intel_renderstate *so);
+void intel_renderstate_fini(struct intel_renderstate *so,
+			    struct intel_context *ce);
 
 #endif /* _INTEL_RENDERSTATE_H_ */
-- 
2.25.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

[Intel-gfx] [PATCH 09/23] drm/i915: Add ww context handling to context_barrier_task

[Maarten Lankhorst]

This is required if we want to pass a ww context in intel_context_pin
and gen6_ppgtt_pin().

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_context.c   | 55 ++++++++++++++-----
 .../drm/i915/gem/selftests/i915_gem_context.c | 22 +++-----
 2 files changed, 48 insertions(+), 29 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c
index fc8585031fcb..c818d55299d1 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c
@@ -1100,6 +1100,7 @@ I915_SELFTEST_DECLARE(static intel_engine_mask_t context_barrier_inject_fault);
 static int context_barrier_task(struct i915_gem_context *ctx,
 				intel_engine_mask_t engines,
 				bool (*skip)(struct intel_context *ce, void *data),
+				int (*pin)(struct intel_context *ce, struct i915_gem_ww_ctx *ww, void *data),
 				int (*emit)(struct i915_request *rq, void *data),
 				void (*task)(void *data),
 				void *data)
@@ -1107,6 +1108,7 @@ static int context_barrier_task(struct i915_gem_context *ctx,
 	struct context_barrier_task *cb;
 	struct i915_gem_engines_iter it;
 	struct i915_gem_engines *e;
+	struct i915_gem_ww_ctx ww;
 	struct intel_context *ce;
 	int err = 0;
 
@@ -1144,10 +1146,21 @@ static int context_barrier_task(struct i915_gem_context *ctx,
 		if (skip && skip(ce, data))
 			continue;
 
-		rq = intel_context_create_request(ce);
+		i915_gem_ww_ctx_init(&ww, true);
+retry:
+		err = intel_context_pin(ce);
+		if (err)
+			goto err;
+
+		if (pin)
+			err = pin(ce, &ww, data);
+		if (err)
+			goto err_unpin;
+
+		rq = i915_request_create(ce);
 		if (IS_ERR(rq)) {
 			err = PTR_ERR(rq);
-			break;
+			goto err_unpin;
 		}
 
 		err = 0;
@@ -1157,6 +1170,16 @@ static int context_barrier_task(struct i915_gem_context *ctx,
 			err = i915_active_add_request(&cb->base, rq);
 
 		i915_request_add(rq);
+err_unpin:
+		intel_context_unpin(ce);
+err:
+		if (err == -EDEADLK) {
+			err = i915_gem_ww_ctx_backoff(&ww);
+			if (!err)
+				goto retry;
+		}
+		i915_gem_ww_ctx_fini(&ww);
+
 		if (err)
 			break;
 	}
@@ -1212,6 +1235,17 @@ static void set_ppgtt_barrier(void *data)
 	i915_vm_close(old);
 }
 
+static int pin_ppgtt_update(struct intel_context *ce, struct i915_gem_ww_ctx *ww, void *data)
+{
+	struct i915_address_space *vm = ce->vm;
+
+	if (!HAS_LOGICAL_RING_CONTEXTS(vm->i915))
+		/* ppGTT is not part of the legacy context image */
+		return gen6_ppgtt_pin(i915_vm_to_ppgtt(vm));
+
+	return 0;
+}
+
 static int emit_ppgtt_update(struct i915_request *rq, void *data)
 {
 	struct i915_address_space *vm = rq->context->vm;
@@ -1268,20 +1302,10 @@ static int emit_ppgtt_update(struct i915_request *rq, void *data)
 
 static bool skip_ppgtt_update(struct intel_context *ce, void *data)
 {
-	if (!test_bit(CONTEXT_ALLOC_BIT, &ce->flags))
-		return true;
-
 	if (HAS_LOGICAL_RING_CONTEXTS(ce->engine->i915))
-		return false;
-
-	if (!atomic_read(&ce->pin_count))
-		return true;
-
-	/* ppGTT is not part of the legacy context image */
-	if (gen6_ppgtt_pin(i915_vm_to_ppgtt(ce->vm)))
-		return true;
-
-	return false;
+		return !ce->state;
+	else
+		return !atomic_read(&ce->pin_count);
 }
 
 static int set_ppgtt(struct drm_i915_file_private *file_priv,
@@ -1332,6 +1356,7 @@ static int set_ppgtt(struct drm_i915_file_private *file_priv,
 	 */
 	err = context_barrier_task(ctx, ALL_ENGINES,
 				   skip_ppgtt_update,
+				   pin_ppgtt_update,
 				   emit_ppgtt_update,
 				   set_ppgtt_barrier,
 				   old);
diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
index 42edbd0f3c14..78356031ec61 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
@@ -1903,8 +1903,8 @@ static int mock_context_barrier(void *arg)
 		return -ENOMEM;
 
 	counter = 0;
-	err = context_barrier_task(ctx, 0,
-				   NULL, NULL, mock_barrier_task, &counter);
+	err = context_barrier_task(ctx, 0, NULL, NULL, NULL,
+				   mock_barrier_task, &counter);
 	if (err) {
 		pr_err("Failed at line %d, err=%d\n", __LINE__, err);
 		goto out;
@@ -1916,11 +1916,8 @@ static int mock_context_barrier(void *arg)
 	}
 
 	counter = 0;
-	err = context_barrier_task(ctx, ALL_ENGINES,
-				   skip_unused_engines,
-				   NULL,
-				   mock_barrier_task,
-				   &counter);
+	err = context_barrier_task(ctx, ALL_ENGINES, skip_unused_engines,
+				   NULL, NULL, mock_barrier_task, &counter);
 	if (err) {
 		pr_err("Failed at line %d, err=%d\n", __LINE__, err);
 		goto out;
@@ -1940,8 +1937,8 @@ static int mock_context_barrier(void *arg)
 
 	counter = 0;
 	context_barrier_inject_fault = BIT(RCS0);
-	err = context_barrier_task(ctx, ALL_ENGINES,
-				   NULL, NULL, mock_barrier_task, &counter);
+	err = context_barrier_task(ctx, ALL_ENGINES, NULL, NULL, NULL,
+				   mock_barrier_task, &counter);
 	context_barrier_inject_fault = 0;
 	if (err == -ENXIO)
 		err = 0;
@@ -1955,11 +1952,8 @@ static int mock_context_barrier(void *arg)
 		goto out;
 
 	counter = 0;
-	err = context_barrier_task(ctx, ALL_ENGINES,
-				   skip_unused_engines,
-				   NULL,
-				   mock_barrier_task,
-				   &counter);
+	err = context_barrier_task(ctx, ALL_ENGINES, skip_unused_engines,
+				   NULL, NULL, mock_barrier_task, &counter);
 	if (err) {
 		pr_err("Failed at line %d, err=%d\n", __LINE__, err);
 		goto out;
-- 
2.25.1

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[Intel-gfx] [PATCH 10/23] drm/i915: Nuke arguments to eb_pin_engine

[Maarten Lankhorst]

Those arguments are already set as eb.file and eb.args, so kill off
the extra arguments. This will allow us to move eb_pin_engine() to
after we reserved all BO's.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index dd3aff4ac3fb..7fef5a85ecde 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -2428,11 +2428,10 @@ static void eb_unpin_engine(struct i915_execbuffer *eb)
 }
 
 static unsigned int
-eb_select_legacy_ring(struct i915_execbuffer *eb,
-		      struct drm_file *file,
-		      struct drm_i915_gem_execbuffer2 *args)
+eb_select_legacy_ring(struct i915_execbuffer *eb)
 {
 	struct drm_i915_private *i915 = eb->i915;
+	struct drm_i915_gem_execbuffer2 *args = eb->args;
 	unsigned int user_ring_id = args->flags & I915_EXEC_RING_MASK;
 
 	if (user_ring_id != I915_EXEC_BSD &&
@@ -2447,7 +2446,7 @@ eb_select_legacy_ring(struct i915_execbuffer *eb,
 		unsigned int bsd_idx = args->flags & I915_EXEC_BSD_MASK;
 
 		if (bsd_idx == I915_EXEC_BSD_DEFAULT) {
-			bsd_idx = gen8_dispatch_bsd_engine(i915, file);
+			bsd_idx = gen8_dispatch_bsd_engine(i915, eb->file);
 		} else if (bsd_idx >= I915_EXEC_BSD_RING1 &&
 			   bsd_idx <= I915_EXEC_BSD_RING2) {
 			bsd_idx >>= I915_EXEC_BSD_SHIFT;
@@ -2472,18 +2471,16 @@ eb_select_legacy_ring(struct i915_execbuffer *eb,
 }
 
 static int
-eb_pin_engine(struct i915_execbuffer *eb,
-	      struct drm_file *file,
-	      struct drm_i915_gem_execbuffer2 *args)
+eb_pin_engine(struct i915_execbuffer *eb)
 {
 	struct intel_context *ce;
 	unsigned int idx;
 	int err;
 
 	if (i915_gem_context_user_engines(eb->gem_context))
-		idx = args->flags & I915_EXEC_RING_MASK;
+		idx = eb->args->flags & I915_EXEC_RING_MASK;
 	else
-		idx = eb_select_legacy_ring(eb, file, args);
+		idx = eb_select_legacy_ring(eb);
 
 	ce = i915_gem_context_get_engine(eb->gem_context, idx);
 	if (IS_ERR(ce))
@@ -2781,7 +2778,7 @@ i915_gem_do_execbuffer(struct drm_device *dev,
 	if (unlikely(err))
 		goto err_destroy;
 
-	err = eb_pin_engine(&eb, file, args);
+	err = eb_pin_engine(&eb);
 	if (unlikely(err))
 		goto err_context;
 
-- 
2.25.1

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[Intel-gfx] [PATCH 11/23] drm/i915: Pin engine before pinning all objects, v3.

[Maarten Lankhorst]

We want to lock all gem objects, including the engine context objects,
rework the throttling to ensure that we can do this. Now we only throttle
once, but can take eb_pin_engine while acquiring objects. This means we
will have to drop the lock to wait. If we don't have to throttle we can
still take the fastpath, if not we will take the slowpath and wait for
the throttle request while unlocked.

The engine has to be pinned as first step, otherwise gpu relocations
won't work.

Changes since v1:
- Only need to get a throttled request in the fastpath, no need for
  a global flag any more.
- Always free the waited request correctly.
Changes since v2:
- Use intel_engine_pm_get()/put() to keeep engine pool alive during
  EDEADLK handling.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 .../gpu/drm/i915/gem/i915_gem_execbuffer.c    | 185 ++++++++++++------
 1 file changed, 129 insertions(+), 56 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index 7fef5a85ecde..3374d968ba46 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -16,6 +16,7 @@
 #include "gem/i915_gem_ioctls.h"
 #include "gt/intel_context.h"
 #include "gt/intel_engine_pool.h"
+#include "gt/intel_engine_pm.h"
 #include "gt/intel_gt.h"
 #include "gt/intel_gt_pm.h"
 #include "gt/intel_ring.h"
@@ -55,7 +56,8 @@ enum {
 #define __EXEC_OBJECT_RESERVED (__EXEC_OBJECT_HAS_PIN | __EXEC_OBJECT_HAS_FENCE)
 
 #define __EXEC_HAS_RELOC	BIT(31)
-#define __EXEC_INTERNAL_FLAGS	(~0u << 31)
+#define __EXEC_ENGINE_PINNED	BIT(30)
+#define __EXEC_INTERNAL_FLAGS	(~0u << 30)
 #define UPDATE			PIN_OFFSET_FIXED
 
 #define BATCH_OFFSET_BIAS (256*1024)
@@ -235,6 +237,7 @@ struct i915_execbuffer {
 	struct intel_engine_cs *engine; /** engine to queue the request to */
 	struct intel_context *context; /* logical state for the request */
 	struct i915_gem_context *gem_context; /** caller's context */
+	intel_wakeref_t wakeref; /** wakeref for runtime pm */
 
 	struct i915_request *request; /** our request to build */
 	struct eb_vma *batch; /** identity of the batch obj/vma */
@@ -288,6 +291,9 @@ struct i915_execbuffer {
 };
 
 static int eb_parse(struct i915_execbuffer *eb);
+static struct i915_request *eb_pin_engine(struct i915_execbuffer *eb,
+					  bool throttle);
+static void eb_unpin_engine(struct i915_execbuffer *eb);
 
 static inline bool eb_use_cmdparser(const struct i915_execbuffer *eb)
 {
@@ -914,7 +920,7 @@ eb_get_vma(const struct i915_execbuffer *eb, unsigned long handle)
 	}
 }
 
-static void eb_release_vmas(const struct i915_execbuffer *eb, bool final)
+static void eb_release_vmas(struct i915_execbuffer *eb, bool final)
 {
 	const unsigned int count = eb->buffer_count;
 	unsigned int i;
@@ -931,6 +937,8 @@ static void eb_release_vmas(const struct i915_execbuffer *eb, bool final)
 		if (final)
 			i915_vma_put(vma);
 	}
+
+	eb_unpin_engine(eb);
 }
 
 static void eb_destroy(const struct i915_execbuffer *eb)
@@ -1729,7 +1737,8 @@ static int eb_prefault_relocations(const struct i915_execbuffer *eb)
 	return 0;
 }
 
-static noinline int eb_relocate_parse_slow(struct i915_execbuffer *eb)
+static noinline int eb_relocate_parse_slow(struct i915_execbuffer *eb,
+					   struct i915_request *rq)
 {
 	bool have_copy = false;
 	struct eb_vma *ev;
@@ -1745,6 +1754,21 @@ static noinline int eb_relocate_parse_slow(struct i915_execbuffer *eb)
 	eb_release_vmas(eb, false);
 	i915_gem_ww_ctx_fini(&eb->ww);
 
+	if (rq) {
+		/* nonblocking is always false */
+		if (i915_request_wait(rq, I915_WAIT_INTERRUPTIBLE,
+				      MAX_SCHEDULE_TIMEOUT) < 0) {
+			i915_request_put(rq);
+			rq = NULL;
+
+			err = -EINTR;
+			goto err_relock;
+		}
+
+		i915_request_put(rq);
+		rq = NULL;
+	}
+
 	/*
 	 * We take 3 passes through the slowpatch.
 	 *
@@ -1768,14 +1792,25 @@ static noinline int eb_relocate_parse_slow(struct i915_execbuffer *eb)
 		err = 0;
 	}
 
-	flush_workqueue(eb->i915->mm.userptr_wq);
+	if (!err)
+		flush_workqueue(eb->i915->mm.userptr_wq);
 
+err_relock:
 	i915_gem_ww_ctx_init(&eb->ww, true);
 	if (err)
 		goto out;
 
 	/* reacquire the objects */
 repeat_validate:
+	rq = eb_pin_engine(eb, false);
+	if (IS_ERR(rq)) {
+		err = PTR_ERR(rq);
+		goto err;
+	}
+
+	/* We didn't throttle, should be NULL */
+	GEM_WARN_ON(rq);
+
 	err = eb_validate_vmas(eb);
 	if (err)
 		goto err;
@@ -1839,14 +1874,47 @@ static noinline int eb_relocate_parse_slow(struct i915_execbuffer *eb)
 		}
 	}
 
+	if (rq)
+		i915_request_put(rq);
+
 	return err;
 }
 
 static int eb_relocate_parse(struct i915_execbuffer *eb)
 {
 	int err;
+	struct i915_request *rq = NULL;
+	bool throttle = true;
 
 retry:
+	rq = eb_pin_engine(eb, throttle);
+	if (IS_ERR(rq)) {
+		err = PTR_ERR(rq);
+		rq = NULL;
+		if (err != -EDEADLK)
+			return err;
+
+		goto err;
+	}
+
+	if (rq) {
+		bool nonblock = eb->file->filp->f_flags & O_NONBLOCK;
+
+		/* Need to drop all locks now for throttling, take slowpath */
+		err = i915_request_wait(rq, I915_WAIT_INTERRUPTIBLE, 0);
+		if (err == -ETIME) {
+			if (nonblock) {
+				err = -EWOULDBLOCK;
+				i915_request_put(rq);
+				goto err;
+			}
+			goto slow;
+		}
+	}
+
+	/* only throttle once, even if we didn't need to throttle */
+	throttle = false;
+
 	err = eb_validate_vmas(eb);
 	if (err == -EAGAIN)
 		goto slow;
@@ -1879,7 +1947,7 @@ static int eb_relocate_parse(struct i915_execbuffer *eb)
 	return err;
 
 slow:
-	err = eb_relocate_parse_slow(eb);
+	err = eb_relocate_parse_slow(eb, rq);
 	if (err)
 		/*
 		 * If the user expects the execobject.offset and
@@ -2304,7 +2372,7 @@ static const enum intel_engine_id user_ring_map[] = {
 	[I915_EXEC_VEBOX]	= VECS0
 };
 
-static struct i915_request *eb_throttle(struct intel_context *ce)
+static struct i915_request *eb_throttle(struct i915_execbuffer *eb, struct intel_context *ce)
 {
 	struct intel_ring *ring = ce->ring;
 	struct intel_timeline *tl = ce->timeline;
@@ -2338,22 +2406,17 @@ static struct i915_request *eb_throttle(struct intel_context *ce)
 	return i915_request_get(rq);
 }
 
-static int __eb_pin_engine(struct i915_execbuffer *eb, struct intel_context *ce)
+static struct i915_request *eb_pin_engine(struct i915_execbuffer *eb, bool throttle)
 {
+	struct intel_context *ce = eb->context;
 	struct intel_timeline *tl;
-	struct i915_request *rq;
+	struct i915_request *rq = NULL;
 	int err;
 
-	/*
-	 * ABI: Before userspace accesses the GPU (e.g. execbuffer), report
-	 * EIO if the GPU is already wedged.
-	 */
-	err = intel_gt_terminally_wedged(ce->engine->gt);
-	if (err)
-		return err;
+	GEM_BUG_ON(eb->args->flags & __EXEC_ENGINE_PINNED);
 
 	if (unlikely(intel_context_is_banned(ce)))
-		return -EIO;
+		return ERR_PTR(-EIO);
 
 	/*
 	 * Pinning the contexts may generate requests in order to acquire
@@ -2362,7 +2425,7 @@ static int __eb_pin_engine(struct i915_execbuffer *eb, struct intel_context *ce)
 	 */
 	err = intel_context_pin(ce);
 	if (err)
-		return err;
+		return ERR_PTR(err);
 
 	/*
 	 * Take a local wakeref for preparing to dispatch the execbuf as
@@ -2374,45 +2437,17 @@ static int __eb_pin_engine(struct i915_execbuffer *eb, struct intel_context *ce)
 	 */
 	tl = intel_context_timeline_lock(ce);
 	if (IS_ERR(tl)) {
-		err = PTR_ERR(tl);
-		goto err_unpin;
+		intel_context_unpin(ce);
+		return ERR_CAST(tl);
 	}
 
 	intel_context_enter(ce);
-	rq = eb_throttle(ce);
-
+	if (throttle)
+		rq = eb_throttle(eb, ce);
 	intel_context_timeline_unlock(tl);
 
-	if (rq) {
-		bool nonblock = eb->file->filp->f_flags & O_NONBLOCK;
-		long timeout;
-
-		timeout = MAX_SCHEDULE_TIMEOUT;
-		if (nonblock)
-			timeout = 0;
-
-		timeout = i915_request_wait(rq,
-					    I915_WAIT_INTERRUPTIBLE,
-					    timeout);
-		i915_request_put(rq);
-
-		if (timeout < 0) {
-			err = nonblock ? -EWOULDBLOCK : timeout;
-			goto err_exit;
-		}
-	}
-
-	eb->engine = ce->engine;
-	eb->context = ce;
-	return 0;
-
-err_exit:
-	mutex_lock(&tl->mutex);
-	intel_context_exit(ce);
-	intel_context_timeline_unlock(tl);
-err_unpin:
-	intel_context_unpin(ce);
-	return err;
+	eb->args->flags |= __EXEC_ENGINE_PINNED;
+	return rq;
 }
 
 static void eb_unpin_engine(struct i915_execbuffer *eb)
@@ -2420,6 +2455,11 @@ static void eb_unpin_engine(struct i915_execbuffer *eb)
 	struct intel_context *ce = eb->context;
 	struct intel_timeline *tl = ce->timeline;
 
+	if (!(eb->args->flags & __EXEC_ENGINE_PINNED))
+		return;
+
+	eb->args->flags &= ~__EXEC_ENGINE_PINNED;
+
 	mutex_lock(&tl->mutex);
 	intel_context_exit(ce);
 	mutex_unlock(&tl->mutex);
@@ -2471,7 +2511,7 @@ eb_select_legacy_ring(struct i915_execbuffer *eb)
 }
 
 static int
-eb_pin_engine(struct i915_execbuffer *eb)
+eb_select_engine(struct i915_execbuffer *eb)
 {
 	struct intel_context *ce;
 	unsigned int idx;
@@ -2486,10 +2526,43 @@ eb_pin_engine(struct i915_execbuffer *eb)
 	if (IS_ERR(ce))
 		return PTR_ERR(ce);
 
-	err = __eb_pin_engine(eb, ce);
-	intel_context_put(ce);
+	eb->wakeref = intel_runtime_pm_get(&eb->i915->runtime_pm);
+
+	if (!test_bit(CONTEXT_ALLOC_BIT, &ce->flags)) {
+		err = intel_context_alloc_state(ce);
+		if (err)
+			goto err;
+	}
+
+	/*
+	 * ABI: Before userspace accesses the GPU (e.g. execbuffer), report
+	 * EIO if the GPU is already wedged.
+	 */
+	err = intel_gt_terminally_wedged(ce->engine->gt);
+	if (err)
+		goto err;
 
+	eb->context = ce;
+	eb->engine = ce->engine;
+
+	/*
+	 * Make sure engine pool stays alive even if we call intel_context_put
+	 * during ww handling. The pool is destroyed when last pm reference
+	 * is dropped, which breaks our -EDEADLK handling.
+	 */
 	return err;
+
+err:
+	intel_context_put(ce);
+	intel_runtime_pm_put(&eb->i915->runtime_pm, eb->wakeref);
+	return err;
+}
+
+static void
+eb_put_engine(struct i915_execbuffer *eb)
+{
+	intel_context_put(eb->context);
+	intel_runtime_pm_put(&eb->i915->runtime_pm, eb->wakeref);
 }
 
 static void
@@ -2778,7 +2851,7 @@ i915_gem_do_execbuffer(struct drm_device *dev,
 	if (unlikely(err))
 		goto err_destroy;
 
-	err = eb_pin_engine(&eb);
+	err = eb_select_engine(&eb);
 	if (unlikely(err))
 		goto err_context;
 
@@ -2916,7 +2989,7 @@ i915_gem_do_execbuffer(struct drm_device *dev,
 	WARN_ON(err == -EDEADLK);
 	i915_gem_ww_ctx_fini(&eb.ww);
 err_engine:
-	eb_unpin_engine(&eb);
+	eb_put_engine(&eb);
 err_context:
 	i915_gem_context_put(eb.gem_context);
 err_destroy:
-- 
2.25.1

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[Intel-gfx] [PATCH 12/23] drm/i915: Rework intel_context pinning to do everything outside of pin_mutex

[Maarten Lankhorst]

Instead of doing everything inside of pin_mutex, we move all pinning
outside. Because i915_active has its own reference counting and
pinning is also having the same issues vs mutexes, we make sure
everything is pinned first, so the pinning in i915_active only needs
to bump refcounts. This allows us to take pin refcounts correctly
all the time.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 drivers/gpu/drm/i915/gt/intel_context.c       | 232 +++++++++++-------
 drivers/gpu/drm/i915/gt/intel_context_types.h |   4 +-
 drivers/gpu/drm/i915/gt/intel_lrc.c           |  34 ++-
 .../gpu/drm/i915/gt/intel_ring_submission.c   |  13 +-
 drivers/gpu/drm/i915/gt/mock_engine.c         |  13 +-
 5 files changed, 190 insertions(+), 106 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_context.c b/drivers/gpu/drm/i915/gt/intel_context.c
index e4aece20bc80..c039e87a46c4 100644
--- a/drivers/gpu/drm/i915/gt/intel_context.c
+++ b/drivers/gpu/drm/i915/gt/intel_context.c
@@ -93,79 +93,6 @@ static void intel_context_active_release(struct intel_context *ce)
 	i915_active_release(&ce->active);
 }
 
-int __intel_context_do_pin(struct intel_context *ce)
-{
-	int err;
-
-	if (unlikely(!test_bit(CONTEXT_ALLOC_BIT, &ce->flags))) {
-		err = intel_context_alloc_state(ce);
-		if (err)
-			return err;
-	}
-
-	err = i915_active_acquire(&ce->active);
-	if (err)
-		return err;
-
-	if (mutex_lock_interruptible(&ce->pin_mutex)) {
-		err = -EINTR;
-		goto out_release;
-	}
-
-	if (unlikely(intel_context_is_closed(ce))) {
-		err = -ENOENT;
-		goto out_unlock;
-	}
-
-	if (likely(!atomic_add_unless(&ce->pin_count, 1, 0))) {
-		err = intel_context_active_acquire(ce);
-		if (unlikely(err))
-			goto out_unlock;
-
-		err = ce->ops->pin(ce);
-		if (unlikely(err))
-			goto err_active;
-
-		CE_TRACE(ce, "pin ring:{start:%08x, head:%04x, tail:%04x}\n",
-			 i915_ggtt_offset(ce->ring->vma),
-			 ce->ring->head, ce->ring->tail);
-
-		smp_mb__before_atomic(); /* flush pin before it is visible */
-		atomic_inc(&ce->pin_count);
-	}
-
-	GEM_BUG_ON(!intel_context_is_pinned(ce)); /* no overflow! */
-	GEM_BUG_ON(i915_active_is_idle(&ce->active));
-	goto out_unlock;
-
-err_active:
-	intel_context_active_release(ce);
-out_unlock:
-	mutex_unlock(&ce->pin_mutex);
-out_release:
-	i915_active_release(&ce->active);
-	return err;
-}
-
-void intel_context_unpin(struct intel_context *ce)
-{
-	if (!atomic_dec_and_test(&ce->pin_count))
-		return;
-
-	CE_TRACE(ce, "unpin\n");
-	ce->ops->unpin(ce);
-
-	/*
-	 * Once released, we may asynchronously drop the active reference.
-	 * As that may be the only reference keeping the context alive,
-	 * take an extra now so that it is not freed before we finish
-	 * dereferencing it.
-	 */
-	intel_context_get(ce);
-	intel_context_active_release(ce);
-	intel_context_put(ce);
-}
-
 static int __context_pin_state(struct i915_vma *vma)
 {
 	unsigned int bias = i915_ggtt_pin_bias(vma) | PIN_OFFSET_BIAS;
@@ -225,6 +152,138 @@ static void __ring_retire(struct intel_ring *ring)
 	i915_active_release(&ring->vma->active);
 }
 
+static int intel_context_pre_pin(struct intel_context *ce)
+{
+	int err;
+
+	CE_TRACE(ce, "active\n");
+
+	err = __ring_active(ce->ring);
+	if (err)
+		return err;
+
+	err = intel_timeline_pin(ce->timeline);
+	if (err)
+		goto err_ring;
+
+	if (!ce->state)
+		return 0;
+
+	err = __context_pin_state(ce->state);
+	if (err)
+		goto err_timeline;
+
+
+	return 0;
+
+err_timeline:
+	intel_timeline_unpin(ce->timeline);
+err_ring:
+	__ring_retire(ce->ring);
+	return err;
+}
+
+static void intel_context_post_unpin(struct intel_context *ce)
+{
+	if (ce->state)
+		__context_unpin_state(ce->state);
+
+	intel_timeline_unpin(ce->timeline);
+	__ring_retire(ce->ring);
+}
+
+int __intel_context_do_pin(struct intel_context *ce)
+{
+	bool handoff = false;
+	void *vaddr;
+	int err = 0;
+
+	if (unlikely(!test_bit(CONTEXT_ALLOC_BIT, &ce->flags))) {
+		err = intel_context_alloc_state(ce);
+		if (err)
+			return err;
+	}
+
+	/*
+	 * We always pin the context/ring/timeline here, to ensure a pin
+	 * refcount for __intel_context_active(), which prevent a lock
+	 * inversion of ce->pin_mutex vs dma_resv_lock().
+	 */
+	err = intel_context_pre_pin(ce);
+	if (err)
+		return err;
+
+	err = i915_active_acquire(&ce->active);
+	if (err)
+		goto err_ctx_unpin;
+
+	err = ce->ops->pre_pin(ce, &vaddr);
+	if (err)
+		goto err_release;
+
+	err = mutex_lock_interruptible(&ce->pin_mutex);
+	if (err)
+		goto err_post_unpin;
+
+	if (unlikely(intel_context_is_closed(ce))) {
+		err = -ENOENT;
+		goto err_unlock;
+	}
+
+	if (likely(!atomic_add_unless(&ce->pin_count, 1, 0))) {
+		err = intel_context_active_acquire(ce);
+		if (unlikely(err))
+			goto err_unlock;
+
+		err = ce->ops->pin(ce, vaddr);
+		if (err) {
+			intel_context_active_release(ce);
+			goto err_unlock;
+		}
+
+		CE_TRACE(ce, "pin ring:{start:%08x, head:%04x, tail:%04x}\n",
+			 i915_ggtt_offset(ce->ring->vma),
+			 ce->ring->head, ce->ring->tail);
+
+		handoff = true;
+		smp_mb__before_atomic(); /* flush pin before it is visible */
+		atomic_inc(&ce->pin_count);
+	}
+
+	GEM_BUG_ON(!intel_context_is_pinned(ce)); /* no overflow! */
+
+err_unlock:
+	mutex_unlock(&ce->pin_mutex);
+err_post_unpin:
+	if (!handoff)
+		ce->ops->post_unpin(ce);
+err_release:
+	i915_active_release(&ce->active);
+err_ctx_unpin:
+	intel_context_post_unpin(ce);
+	return err;
+}
+
+void intel_context_unpin(struct intel_context *ce)
+{
+	if (!atomic_dec_and_test(&ce->pin_count))
+		return;
+
+	CE_TRACE(ce, "unpin\n");
+	ce->ops->unpin(ce);
+	ce->ops->post_unpin(ce);
+
+	/*
+	 * Once released, we may asynchronously drop the active reference.
+	 * As that may be the only reference keeping the context alive,
+	 * take an extra now so that it is not freed before we finish
+	 * dereferencing it.
+	 */
+	intel_context_get(ce);
+	intel_context_active_release(ce);
+	intel_context_put(ce);
+}
+
 __i915_active_call
 static void __intel_context_retire(struct i915_active *active)
 {
@@ -235,12 +294,7 @@ static void __intel_context_retire(struct i915_active *active)
 		 intel_context_get_avg_runtime_ns(ce));
 
 	set_bit(CONTEXT_VALID_BIT, &ce->flags);
-	if (ce->state)
-		__context_unpin_state(ce->state);
-
-	intel_timeline_unpin(ce->timeline);
-	__ring_retire(ce->ring);
-
+	intel_context_post_unpin(ce);
 	intel_context_put(ce);
 }
 
@@ -249,29 +303,25 @@ static int __intel_context_active(struct i915_active *active)
 	struct intel_context *ce = container_of(active, typeof(*ce), active);
 	int err;
 
-	CE_TRACE(ce, "active\n");
-
 	intel_context_get(ce);
 
+	/* everything should already be activated by intel_context_pre_pin() */
 	err = __ring_active(ce->ring);
-	if (err)
+	if (GEM_WARN_ON(err))
 		goto err_put;
 
 	err = intel_timeline_pin(ce->timeline);
-	if (err)
+	if (GEM_WARN_ON(err))
 		goto err_ring;
 
-	if (!ce->state)
-		return 0;
-
-	err = __context_pin_state(ce->state);
-	if (err)
-		goto err_timeline;
+	if (ce->state) {
+		GEM_WARN_ON(!i915_active_acquire_if_busy(&ce->state->active));
+		__i915_vma_pin(ce->state);
+		i915_vma_make_unshrinkable(ce->state);
+	}
 
 	return 0;
 
-err_timeline:
-	intel_timeline_unpin(ce->timeline);
 err_ring:
 	__ring_retire(ce->ring);
 err_put:
diff --git a/drivers/gpu/drm/i915/gt/intel_context_types.h b/drivers/gpu/drm/i915/gt/intel_context_types.h
index 07cb83a0d017..395af0476a4e 100644
--- a/drivers/gpu/drm/i915/gt/intel_context_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_context_types.h
@@ -30,8 +30,10 @@ struct intel_ring;
 struct intel_context_ops {
 	int (*alloc)(struct intel_context *ce);
 
-	int (*pin)(struct intel_context *ce);
+	int (*pre_pin)(struct intel_context *ce, void **vaddr);
+	int (*pin)(struct intel_context *ce, void *vaddr);
 	void (*unpin)(struct intel_context *ce);
+	void (*post_unpin)(struct intel_context *ce);
 
 	void (*enter)(struct intel_context *ce);
 	void (*exit)(struct intel_context *ce);
diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
index 19ffc7763683..081f7dad43b4 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -3110,7 +3110,10 @@ static void execlists_context_unpin(struct intel_context *ce)
 {
 	check_redzone((void *)ce->lrc_reg_state - LRC_STATE_PN * PAGE_SIZE,
 		      ce->engine);
+}
 
+static void execlists_context_post_unpin(struct intel_context *ce)
+{
 	i915_gem_object_unpin_map(ce->state->obj);
 }
 
@@ -3140,20 +3143,23 @@ __execlists_update_reg_state(const struct intel_context *ce,
 }
 
 static int
-__execlists_context_pin(struct intel_context *ce,
-			struct intel_engine_cs *engine)
+execlists_context_pre_pin(struct intel_context *ce, void **vaddr)
 {
-	void *vaddr;
-
 	GEM_BUG_ON(!ce->state);
 	GEM_BUG_ON(!i915_vma_is_pinned(ce->state));
 
-	vaddr = i915_gem_object_pin_map(ce->state->obj,
-					i915_coherent_map_type(engine->i915) |
+	*vaddr = i915_gem_object_pin_map(ce->state->obj,
+					i915_coherent_map_type(ce->engine->i915) |
 					I915_MAP_OVERRIDE);
-	if (IS_ERR(vaddr))
-		return PTR_ERR(vaddr);
 
+	return PTR_ERR_OR_ZERO(*vaddr);
+}
+
+static int
+__execlists_context_pin(struct intel_context *ce,
+			struct intel_engine_cs *engine,
+			void *vaddr)
+{
 	ce->lrc_desc = lrc_descriptor(ce, engine) | CTX_DESC_FORCE_RESTORE;
 	ce->lrc_reg_state = vaddr + LRC_STATE_PN * PAGE_SIZE;
 	__execlists_update_reg_state(ce, engine, ce->ring->tail);
@@ -3161,9 +3167,9 @@ __execlists_context_pin(struct intel_context *ce,
 	return 0;
 }
 
-static int execlists_context_pin(struct intel_context *ce)
+static int execlists_context_pin(struct intel_context *ce, void *vaddr)
 {
-	return __execlists_context_pin(ce, ce->engine);
+	return __execlists_context_pin(ce, ce->engine, vaddr);
 }
 
 static int execlists_context_alloc(struct intel_context *ce)
@@ -3189,8 +3195,10 @@ static void execlists_context_reset(struct intel_context *ce)
 static const struct intel_context_ops execlists_context_ops = {
 	.alloc = execlists_context_alloc,
 
+	.pre_pin = execlists_context_pre_pin,
 	.pin = execlists_context_pin,
 	.unpin = execlists_context_unpin,
+	.post_unpin = execlists_context_post_unpin,
 
 	.enter = intel_context_enter_engine,
 	.exit = intel_context_exit_engine,
@@ -4971,13 +4979,13 @@ static int virtual_context_alloc(struct intel_context *ce)
 	return __execlists_context_alloc(ce, ve->siblings[0]);
 }
 
-static int virtual_context_pin(struct intel_context *ce)
+static int virtual_context_pin(struct intel_context *ce, void *vaddr)
 {
 	struct virtual_engine *ve = container_of(ce, typeof(*ve), context);
 	int err;
 
 	/* Note: we must use a real engine class for setting up reg state */
-	err = __execlists_context_pin(ce, ve->siblings[0]);
+	err = __execlists_context_pin(ce, ve->siblings[0], vaddr);
 	if (err)
 		return err;
 
@@ -5010,8 +5018,10 @@ static void virtual_context_exit(struct intel_context *ce)
 static const struct intel_context_ops virtual_context_ops = {
 	.alloc = virtual_context_alloc,
 
+	.pre_pin = execlists_context_pre_pin,
 	.pin = virtual_context_pin,
 	.unpin = execlists_context_unpin,
+	.post_unpin = execlists_context_post_unpin,
 
 	.enter = virtual_context_enter,
 	.exit = virtual_context_exit,
diff --git a/drivers/gpu/drm/i915/gt/intel_ring_submission.c b/drivers/gpu/drm/i915/gt/intel_ring_submission.c
index d015f7b8b28e..d89475b8cfd6 100644
--- a/drivers/gpu/drm/i915/gt/intel_ring_submission.c
+++ b/drivers/gpu/drm/i915/gt/intel_ring_submission.c
@@ -1206,6 +1206,10 @@ static void __context_unpin_ppgtt(struct intel_context *ce)
 }
 
 static void ring_context_unpin(struct intel_context *ce)
+{
+}
+
+static void ring_context_post_unpin(struct intel_context *ce)
 {
 	__context_unpin_ppgtt(ce);
 }
@@ -1303,11 +1307,16 @@ static int ring_context_alloc(struct intel_context *ce)
 	return 0;
 }
 
-static int ring_context_pin(struct intel_context *ce)
+static int ring_context_pre_pin(struct intel_context *ce, void **unused)
 {
 	return __context_pin_ppgtt(ce);
 }
 
+static int ring_context_pin(struct intel_context *ce, void *unused)
+{
+	return 0;
+}
+
 static void ring_context_reset(struct intel_context *ce)
 {
 	intel_ring_reset(ce->ring, ce->ring->emit);
@@ -1316,8 +1325,10 @@ static void ring_context_reset(struct intel_context *ce)
 static const struct intel_context_ops ring_context_ops = {
 	.alloc = ring_context_alloc,
 
+	.pre_pin = ring_context_pre_pin,
 	.pin = ring_context_pin,
 	.unpin = ring_context_unpin,
+	.post_unpin = ring_context_post_unpin,
 
 	.enter = intel_context_enter_engine,
 	.exit = intel_context_exit_engine,
diff --git a/drivers/gpu/drm/i915/gt/mock_engine.c b/drivers/gpu/drm/i915/gt/mock_engine.c
index 4a53ded7c2dd..9ec42769e46e 100644
--- a/drivers/gpu/drm/i915/gt/mock_engine.c
+++ b/drivers/gpu/drm/i915/gt/mock_engine.c
@@ -132,6 +132,10 @@ static void mock_context_unpin(struct intel_context *ce)
 {
 }
 
+static void mock_context_post_unpin(struct intel_context *ce)
+{
+}
+
 static void mock_context_destroy(struct kref *ref)
 {
 	struct intel_context *ce = container_of(ref, typeof(*ce), ref);
@@ -165,7 +169,12 @@ static int mock_context_alloc(struct intel_context *ce)
 	return 0;
 }
 
-static int mock_context_pin(struct intel_context *ce)
+static int mock_context_pre_pin(struct intel_context *ce, void **unused)
+{
+	return 0;
+}
+
+static int mock_context_pin(struct intel_context *ce, void *unused)
 {
 	return 0;
 }
@@ -177,8 +186,10 @@ static void mock_context_reset(struct intel_context *ce)
 static const struct intel_context_ops mock_context_ops = {
 	.alloc = mock_context_alloc,
 
+	.pre_pin = mock_context_pre_pin,
 	.pin = mock_context_pin,
 	.unpin = mock_context_unpin,
+	.post_unpin = mock_context_post_unpin,
 
 	.enter = intel_context_enter_engine,
 	.exit = intel_context_exit_engine,
-- 
2.25.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

[Intel-gfx] [PATCH 13/23] drm/i915: Make sure execbuffer always passes ww state to i915_vma_pin.

[Maarten Lankhorst]

As a preparation step for full object locking and wait/wound handling
during pin and object mapping, ensure that we always pass the ww context
in i915_gem_execbuffer.c to i915_vma_pin, use lockdep to ensure this
happens.

This also requires changing the order of eb_parse slightly, to ensure
we pass ww at a point where we could still handle -EDEADLK safely.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c  |   2 +-
 drivers/gpu/drm/i915/gem/i915_gem_context.c   |   4 +-
 .../gpu/drm/i915/gem/i915_gem_execbuffer.c    | 136 ++++++++++--------
 drivers/gpu/drm/i915/gt/gen6_ppgtt.c          |   4 +-
 drivers/gpu/drm/i915/gt/gen6_ppgtt.h          |   4 +-
 drivers/gpu/drm/i915/gt/intel_context.c       |  65 +++++----
 drivers/gpu/drm/i915/gt/intel_context.h       |  13 ++
 drivers/gpu/drm/i915/gt/intel_context_types.h |   3 +-
 drivers/gpu/drm/i915/gt/intel_engine_cs.c     |   2 +-
 drivers/gpu/drm/i915/gt/intel_gt.c            |   2 +-
 drivers/gpu/drm/i915/gt/intel_lrc.c           |   5 +-
 drivers/gpu/drm/i915/gt/intel_renderstate.c   |   2 +-
 drivers/gpu/drm/i915/gt/intel_ring.c          |  10 +-
 drivers/gpu/drm/i915/gt/intel_ring.h          |   3 +-
 .../gpu/drm/i915/gt/intel_ring_submission.c   |  15 +-
 drivers/gpu/drm/i915/gt/intel_timeline.c      |  12 +-
 drivers/gpu/drm/i915/gt/intel_timeline.h      |   3 +-
 drivers/gpu/drm/i915/gt/mock_engine.c         |   3 +-
 drivers/gpu/drm/i915/gt/selftest_timeline.c   |   4 +-
 drivers/gpu/drm/i915/gt/uc/intel_guc.c        |   2 +-
 drivers/gpu/drm/i915/i915_drv.h               |  13 +-
 drivers/gpu/drm/i915/i915_gem.c               |  11 +-
 drivers/gpu/drm/i915/i915_vma.c               |  13 +-
 drivers/gpu/drm/i915/i915_vma.h               |  13 +-
 24 files changed, 213 insertions(+), 131 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 76c6eaa368bf..8ead8dd9c876 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -3447,7 +3447,7 @@ initial_plane_vma(struct drm_i915_private *i915,
 	if (IS_ERR(vma))
 		goto err_obj;
 
-	if (i915_ggtt_pin(vma, 0, PIN_MAPPABLE | PIN_OFFSET_FIXED | base))
+	if (i915_ggtt_pin(vma, NULL, 0, PIN_MAPPABLE | PIN_OFFSET_FIXED | base))
 		goto err_obj;
 
 	if (i915_gem_object_is_tiled(obj) &&
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c
index c818d55299d1..b77584597fc5 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c
@@ -1148,7 +1148,7 @@ static int context_barrier_task(struct i915_gem_context *ctx,
 
 		i915_gem_ww_ctx_init(&ww, true);
 retry:
-		err = intel_context_pin(ce);
+		err = intel_context_pin_ww(ce, &ww);
 		if (err)
 			goto err;
 
@@ -1241,7 +1241,7 @@ static int pin_ppgtt_update(struct intel_context *ce, struct i915_gem_ww_ctx *ww
 
 	if (!HAS_LOGICAL_RING_CONTEXTS(vm->i915))
 		/* ppGTT is not part of the legacy context image */
-		return gen6_ppgtt_pin(i915_vm_to_ppgtt(vm));
+		return gen6_ppgtt_pin(i915_vm_to_ppgtt(vm), ww);
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index 3374d968ba46..4fe7b96fdf71 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -422,16 +422,17 @@ eb_pin_vma(struct i915_execbuffer *eb,
 		pin_flags |= PIN_GLOBAL;
 
 	/* Attempt to reuse the current location if available */
-	if (unlikely(i915_vma_pin(vma, 0, 0, pin_flags))) {
+	/* TODO: Add -EDEADLK handling here */
+	if (unlikely(i915_vma_pin_ww(vma, &eb->ww, 0, 0, pin_flags))) {
 		if (entry->flags & EXEC_OBJECT_PINNED)
 			return false;
 
 		/* Failing that pick any _free_ space if suitable */
-		if (unlikely(i915_vma_pin(vma,
-					  entry->pad_to_size,
-					  entry->alignment,
-					  eb_pin_flags(entry, ev->flags) |
-					  PIN_USER | PIN_NOEVICT)))
+		if (unlikely(i915_vma_pin_ww(vma, &eb->ww,
+					     entry->pad_to_size,
+					     entry->alignment,
+					     eb_pin_flags(entry, ev->flags) |
+					     PIN_USER | PIN_NOEVICT)))
 			return false;
 	}
 
@@ -573,7 +574,7 @@ static inline int use_cpu_reloc(const struct reloc_cache *cache,
 		obj->cache_level != I915_CACHE_NONE);
 }
 
-static int eb_reserve_vma(const struct i915_execbuffer *eb,
+static int eb_reserve_vma(struct i915_execbuffer *eb,
 			  struct eb_vma *ev,
 			  u64 pin_flags)
 {
@@ -588,7 +589,7 @@ static int eb_reserve_vma(const struct i915_execbuffer *eb,
 			return err;
 	}
 
-	err = i915_vma_pin(vma,
+	err = i915_vma_pin_ww(vma, &eb->ww,
 			   entry->pad_to_size, entry->alignment,
 			   eb_pin_flags(entry, ev->flags) | pin_flags);
 	if (err)
@@ -1079,9 +1080,10 @@ static void *reloc_kmap(struct drm_i915_gem_object *obj,
 }
 
 static void *reloc_iomap(struct drm_i915_gem_object *obj,
-			 struct reloc_cache *cache,
+			 struct i915_execbuffer *eb,
 			 unsigned long page)
 {
+	struct reloc_cache *cache = &eb->reloc_cache;
 	struct i915_ggtt *ggtt = cache_to_ggtt(cache);
 	unsigned long offset;
 	void *vaddr;
@@ -1103,10 +1105,13 @@ static void *reloc_iomap(struct drm_i915_gem_object *obj,
 		if (err)
 			return ERR_PTR(err);
 
-		vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0,
-					       PIN_MAPPABLE |
-					       PIN_NONBLOCK /* NOWARN */ |
-					       PIN_NOEVICT);
+		vma = i915_gem_object_ggtt_pin_ww(obj, &eb->ww, NULL, 0, 0,
+						  PIN_MAPPABLE |
+						  PIN_NONBLOCK /* NOWARN */ |
+						  PIN_NOEVICT);
+		if (vma == ERR_PTR(-EDEADLK))
+			return vma;
+
 		if (IS_ERR(vma)) {
 			memset(&cache->node, 0, sizeof(cache->node));
 			mutex_lock(&ggtt->vm.mutex);
@@ -1142,9 +1147,10 @@ static void *reloc_iomap(struct drm_i915_gem_object *obj,
 }
 
 static void *reloc_vaddr(struct drm_i915_gem_object *obj,
-			 struct reloc_cache *cache,
+			 struct i915_execbuffer *eb,
 			 unsigned long page)
 {
+	struct reloc_cache *cache = &eb->reloc_cache;
 	void *vaddr;
 
 	if (cache->page == page) {
@@ -1152,7 +1158,7 @@ static void *reloc_vaddr(struct drm_i915_gem_object *obj,
 	} else {
 		vaddr = NULL;
 		if ((cache->vaddr & KMAP) == 0)
-			vaddr = reloc_iomap(obj, cache, page);
+			vaddr = reloc_iomap(obj, eb, page);
 		if (!vaddr)
 			vaddr = reloc_kmap(obj, cache, page);
 	}
@@ -1235,7 +1241,7 @@ static int __reloc_gpu_alloc(struct i915_execbuffer *eb,
 		goto err_unmap;
 	}
 
-	err = i915_vma_pin(batch, 0, 0, PIN_USER | PIN_NONBLOCK);
+	err = i915_vma_pin_ww(batch, &eb->ww, 0, 0, PIN_USER | PIN_NONBLOCK);
 	if (err)
 		goto err_unmap;
 
@@ -1389,7 +1395,7 @@ relocate_entry(struct i915_vma *vma,
 	}
 
 repeat:
-	vaddr = reloc_vaddr(vma->obj, &eb->reloc_cache, offset >> PAGE_SHIFT);
+	vaddr = reloc_vaddr(vma->obj, eb, offset >> PAGE_SHIFT);
 	if (IS_ERR(vaddr))
 		return PTR_ERR(vaddr);
 
@@ -1805,6 +1811,7 @@ static noinline int eb_relocate_parse_slow(struct i915_execbuffer *eb,
 	rq = eb_pin_engine(eb, false);
 	if (IS_ERR(rq)) {
 		err = PTR_ERR(rq);
+		rq = NULL;
 		goto err;
 	}
 
@@ -2074,7 +2081,8 @@ static int i915_reset_gen7_sol_offsets(struct i915_request *rq)
 }
 
 static struct i915_vma *
-shadow_batch_pin(struct drm_i915_gem_object *obj,
+shadow_batch_pin(struct i915_execbuffer *eb,
+		 struct drm_i915_gem_object *obj,
 		 struct i915_address_space *vm,
 		 unsigned int flags)
 {
@@ -2085,7 +2093,7 @@ shadow_batch_pin(struct drm_i915_gem_object *obj,
 	if (IS_ERR(vma))
 		return vma;
 
-	err = i915_vma_pin(vma, 0, 0, flags);
+	err = i915_vma_pin_ww(vma, &eb->ww, 0, 0, flags);
 	if (err)
 		return ERR_PTR(err);
 
@@ -2197,16 +2205,33 @@ static int eb_parse_pipeline(struct i915_execbuffer *eb,
 	return err;
 }
 
+static struct i915_vma *eb_dispatch_secure(struct i915_execbuffer *eb, struct i915_vma *vma)
+{
+	/*
+	 * snb/ivb/vlv conflate the "batch in ppgtt" bit with the "non-secure
+	 * batch" bit. Hence we need to pin secure batches into the global gtt.
+	 * hsw should have this fixed, but bdw mucks it up again. */
+	if (eb->batch_flags & I915_DISPATCH_SECURE)
+		return i915_gem_object_ggtt_pin_ww(vma->obj, &eb->ww, NULL, 0, 0, 0);
+
+	return NULL;
+}
+
 static int eb_parse(struct i915_execbuffer *eb)
 {
 	struct drm_i915_private *i915 = eb->i915;
 	struct intel_engine_pool_node *pool;
-	struct i915_vma *shadow, *trampoline;
+	struct i915_vma *shadow, *trampoline, *batch;
 	unsigned int len;
 	int err;
 
-	if (!eb_use_cmdparser(eb))
-		return 0;
+	if (!eb_use_cmdparser(eb)) {
+		batch = eb_dispatch_secure(eb, eb->batch->vma);
+		if (IS_ERR(batch))
+			return PTR_ERR(batch);
+
+		goto secure_batch;
+	}
 
 	len = eb->batch_len;
 	if (!CMDPARSER_USES_GGTT(eb->i915)) {
@@ -2231,7 +2256,7 @@ static int eb_parse(struct i915_execbuffer *eb)
 	if (err)
 		goto err;
 
-	shadow = shadow_batch_pin(pool->obj, eb->context->vm, PIN_USER);
+	shadow = shadow_batch_pin(eb, pool->obj, eb->context->vm, PIN_USER);
 	if (IS_ERR(shadow)) {
 		err = PTR_ERR(shadow);
 		goto err;
@@ -2242,7 +2267,7 @@ static int eb_parse(struct i915_execbuffer *eb)
 	if (CMDPARSER_USES_GGTT(eb->i915)) {
 		trampoline = shadow;
 
-		shadow = shadow_batch_pin(pool->obj,
+		shadow = shadow_batch_pin(eb, pool->obj,
 					  &eb->engine->gt->ggtt->vm,
 					  PIN_GLOBAL);
 		if (IS_ERR(shadow)) {
@@ -2254,20 +2279,36 @@ static int eb_parse(struct i915_execbuffer *eb)
 		eb->batch_flags |= I915_DISPATCH_SECURE;
 	}
 
+	batch = eb_dispatch_secure(eb, shadow);
+	if (IS_ERR(batch)) {
+		err = PTR_ERR(batch);
+		goto err_trampoline;
+	}
+
 	err = eb_parse_pipeline(eb, shadow, trampoline);
 	if (err)
-		goto err_trampoline;
+		goto err_unpin_batch;
 
-	eb->vma[eb->buffer_count].vma = i915_vma_get(shadow);
-	eb->vma[eb->buffer_count].flags = __EXEC_OBJECT_HAS_PIN;
 	eb->batch = &eb->vma[eb->buffer_count++];
+	eb->batch->vma = i915_vma_get(shadow);
+	eb->batch->flags = __EXEC_OBJECT_HAS_PIN;
 
 	eb->trampoline = trampoline;
 	eb->batch_start_offset = 0;
 
 	shadow->private = pool;
+
+secure_batch:
+	if (batch) {
+		eb->batch = &eb->vma[eb->buffer_count++];
+		eb->batch->flags = __EXEC_OBJECT_HAS_PIN;
+		eb->batch->vma = batch;
+	}
 	return 0;
 
+err_unpin_batch:
+	if (batch)
+		i915_vma_unpin(batch);
 err_trampoline:
 	if (trampoline)
 		i915_vma_unpin(trampoline);
@@ -2423,7 +2464,7 @@ static struct i915_request *eb_pin_engine(struct i915_execbuffer *eb, bool throt
 	 * GGTT space, so do this first before we reserve a seqno for
 	 * ourselves.
 	 */
-	err = intel_context_pin(ce);
+	err = intel_context_pin_ww(ce, &eb->ww);
 	if (err)
 		return ERR_PTR(err);
 
@@ -2878,33 +2919,7 @@ i915_gem_do_execbuffer(struct drm_device *dev,
 
 	ww_acquire_done(&eb.ww.ctx);
 
-	/*
-	 * snb/ivb/vlv conflate the "batch in ppgtt" bit with the "non-secure
-	 * batch" bit. Hence we need to pin secure batches into the global gtt.
-	 * hsw should have this fixed, but bdw mucks it up again. */
-	if (eb.batch_flags & I915_DISPATCH_SECURE) {
-		struct i915_vma *vma;
-
-		/*
-		 * So on first glance it looks freaky that we pin the batch here
-		 * outside of the reservation loop. But:
-		 * - The batch is already pinned into the relevant ppgtt, so we
-		 *   already have the backing storage fully allocated.
-		 * - No other BO uses the global gtt (well contexts, but meh),
-		 *   so we don't really have issues with multiple objects not
-		 *   fitting due to fragmentation.
-		 * So this is actually safe.
-		 */
-		vma = i915_gem_object_ggtt_pin(eb.batch->vma->obj, NULL, 0, 0, 0);
-		if (IS_ERR(vma)) {
-			err = PTR_ERR(vma);
-			goto err_parse;
-		}
-
-		batch = vma;
-	} else {
-		batch = eb.batch->vma;
-	}
+	batch = eb.batch->vma;
 
 	/* All GPU relocation batches must be submitted prior to the user rq */
 	GEM_BUG_ON(eb.reloc_cache.rq);
@@ -2977,9 +2992,6 @@ i915_gem_do_execbuffer(struct drm_device *dev,
 	i915_request_put(eb.request);
 
 err_batch_unpin:
-	if (eb.batch_flags & I915_DISPATCH_SECURE)
-		i915_vma_unpin(batch);
-err_parse:
 	if (batch->private)
 		intel_engine_pool_put(batch->private);
 err_vma:
@@ -3062,7 +3074,9 @@ i915_gem_execbuffer_ioctl(struct drm_device *dev, void *data,
 	/* Copy in the exec list from userland */
 	exec_list = kvmalloc_array(count, sizeof(*exec_list),
 				   __GFP_NOWARN | GFP_KERNEL);
-	exec2_list = kvmalloc_array(count + 1, eb_element_size(),
+
+	/* Allocate extra slots for use by the command parser */
+	exec2_list = kvmalloc_array(count + 2, eb_element_size(),
 				    __GFP_NOWARN | GFP_KERNEL);
 	if (exec_list == NULL || exec2_list == NULL) {
 		drm_dbg(&i915->drm,
@@ -3140,8 +3154,8 @@ i915_gem_execbuffer2_ioctl(struct drm_device *dev, void *data,
 	if (err)
 		return err;
 
-	/* Allocate an extra slot for use by the command parser */
-	exec2_list = kvmalloc_array(count + 1, eb_element_size(),
+	/* Allocate extra slots for use by the command parser */
+	exec2_list = kvmalloc_array(count + 2, eb_element_size(),
 				    __GFP_NOWARN | GFP_KERNEL);
 	if (exec2_list == NULL) {
 		drm_dbg(&i915->drm, "Failed to allocate exec list for %zd buffers\n",
diff --git a/drivers/gpu/drm/i915/gt/gen6_ppgtt.c b/drivers/gpu/drm/i915/gt/gen6_ppgtt.c
index f4fec7eb4064..8248efa9229f 100644
--- a/drivers/gpu/drm/i915/gt/gen6_ppgtt.c
+++ b/drivers/gpu/drm/i915/gt/gen6_ppgtt.c
@@ -376,7 +376,7 @@ static struct i915_vma *pd_vma_create(struct gen6_ppgtt *ppgtt, int size)
 	return vma;
 }
 
-int gen6_ppgtt_pin(struct i915_ppgtt *base)
+int gen6_ppgtt_pin(struct i915_ppgtt *base, struct i915_gem_ww_ctx *ww)
 {
 	struct gen6_ppgtt *ppgtt = to_gen6_ppgtt(base);
 	int err;
@@ -402,7 +402,7 @@ int gen6_ppgtt_pin(struct i915_ppgtt *base)
 	 */
 	err = 0;
 	if (!atomic_read(&ppgtt->pin_count))
-		err = i915_ggtt_pin(ppgtt->vma, GEN6_PD_ALIGN, PIN_HIGH);
+		err = i915_ggtt_pin(ppgtt->vma, ww, GEN6_PD_ALIGN, PIN_HIGH);
 	if (!err)
 		atomic_inc(&ppgtt->pin_count);
 	mutex_unlock(&ppgtt->pin_mutex);
diff --git a/drivers/gpu/drm/i915/gt/gen6_ppgtt.h b/drivers/gpu/drm/i915/gt/gen6_ppgtt.h
index 72e481806c96..00032a931bae 100644
--- a/drivers/gpu/drm/i915/gt/gen6_ppgtt.h
+++ b/drivers/gpu/drm/i915/gt/gen6_ppgtt.h
@@ -8,6 +8,8 @@
 
 #include "intel_gtt.h"
 
+struct i915_gem_ww_ctx;
+
 struct gen6_ppgtt {
 	struct i915_ppgtt base;
 
@@ -66,7 +68,7 @@ static inline struct gen6_ppgtt *to_gen6_ppgtt(struct i915_ppgtt *base)
 		     (pt = i915_pt_entry(pd, iter), true);		\
 	     ++iter)
 
-int gen6_ppgtt_pin(struct i915_ppgtt *base);
+int gen6_ppgtt_pin(struct i915_ppgtt *base, struct i915_gem_ww_ctx *ww);
 void gen6_ppgtt_unpin(struct i915_ppgtt *base);
 void gen6_ppgtt_unpin_all(struct i915_ppgtt *base);
 void gen6_ppgtt_enable(struct intel_gt *gt);
diff --git a/drivers/gpu/drm/i915/gt/intel_context.c b/drivers/gpu/drm/i915/gt/intel_context.c
index c039e87a46c4..64948386630f 100644
--- a/drivers/gpu/drm/i915/gt/intel_context.c
+++ b/drivers/gpu/drm/i915/gt/intel_context.c
@@ -93,12 +93,12 @@ static void intel_context_active_release(struct intel_context *ce)
 	i915_active_release(&ce->active);
 }
 
-static int __context_pin_state(struct i915_vma *vma)
+static int __context_pin_state(struct i915_vma *vma, struct i915_gem_ww_ctx *ww)
 {
 	unsigned int bias = i915_ggtt_pin_bias(vma) | PIN_OFFSET_BIAS;
 	int err;
 
-	err = i915_ggtt_pin(vma, 0, bias | PIN_HIGH);
+	err = i915_ggtt_pin(vma, ww, 0, bias | PIN_HIGH);
 	if (err)
 		return err;
 
@@ -127,7 +127,8 @@ static void __context_unpin_state(struct i915_vma *vma)
 	__i915_vma_unpin(vma);
 }
 
-static int __ring_active(struct intel_ring *ring)
+static int __ring_active(struct intel_ring *ring,
+			 struct i915_gem_ww_ctx *ww)
 {
 	int err;
 
@@ -135,7 +136,7 @@ static int __ring_active(struct intel_ring *ring)
 	if (err)
 		return err;
 
-	err = intel_ring_pin(ring);
+	err = intel_ring_pin(ring, ww);
 	if (err)
 		goto err_active;
 
@@ -152,24 +153,25 @@ static void __ring_retire(struct intel_ring *ring)
 	i915_active_release(&ring->vma->active);
 }
 
-static int intel_context_pre_pin(struct intel_context *ce)
+static int intel_context_pre_pin(struct intel_context *ce,
+				 struct i915_gem_ww_ctx *ww)
 {
 	int err;
 
 	CE_TRACE(ce, "active\n");
 
-	err = __ring_active(ce->ring);
+	err = __ring_active(ce->ring, ww);
 	if (err)
 		return err;
 
-	err = intel_timeline_pin(ce->timeline);
+	err = intel_timeline_pin(ce->timeline, ww);
 	if (err)
 		goto err_ring;
 
 	if (!ce->state)
 		return 0;
 
-	err = __context_pin_state(ce->state);
+	err = __context_pin_state(ce->state, ww);
 	if (err)
 		goto err_timeline;
 
@@ -192,7 +194,8 @@ static void intel_context_post_unpin(struct intel_context *ce)
 	__ring_retire(ce->ring);
 }
 
-int __intel_context_do_pin(struct intel_context *ce)
+int __intel_context_do_pin_ww(struct intel_context *ce,
+			      struct i915_gem_ww_ctx *ww)
 {
 	bool handoff = false;
 	void *vaddr;
@@ -209,7 +212,14 @@ int __intel_context_do_pin(struct intel_context *ce)
 	 * refcount for __intel_context_active(), which prevent a lock
 	 * inversion of ce->pin_mutex vs dma_resv_lock().
 	 */
-	err = intel_context_pre_pin(ce);
+
+	err = i915_gem_object_lock(ce->timeline->hwsp_ggtt->obj, ww);
+	if (!err && ce->ring->vma->obj)
+		err = i915_gem_object_lock(ce->ring->vma->obj, ww);
+	if (!err && ce->state)
+		err = i915_gem_object_lock(ce->state->obj, ww);
+	if (!err)
+		err = intel_context_pre_pin(ce, ww);
 	if (err)
 		return err;
 
@@ -217,7 +227,7 @@ int __intel_context_do_pin(struct intel_context *ce)
 	if (err)
 		goto err_ctx_unpin;
 
-	err = ce->ops->pre_pin(ce, &vaddr);
+	err = ce->ops->pre_pin(ce, ww, &vaddr);
 	if (err)
 		goto err_release;
 
@@ -264,6 +274,23 @@ int __intel_context_do_pin(struct intel_context *ce)
 	return err;
 }
 
+int __intel_context_do_pin(struct intel_context *ce)
+{
+	struct i915_gem_ww_ctx ww;
+	int err;
+
+	i915_gem_ww_ctx_init(&ww, true);
+retry:
+	err = __intel_context_do_pin_ww(ce, &ww);
+	if (err == -EDEADLK) {
+		err = i915_gem_ww_ctx_backoff(&ww);
+		if (!err)
+			goto retry;
+	}
+	i915_gem_ww_ctx_fini(&ww);
+	return err;
+}
+
 void intel_context_unpin(struct intel_context *ce)
 {
 	if (!atomic_dec_and_test(&ce->pin_count))
@@ -301,18 +328,14 @@ static void __intel_context_retire(struct i915_active *active)
 static int __intel_context_active(struct i915_active *active)
 {
 	struct intel_context *ce = container_of(active, typeof(*ce), active);
-	int err;
 
 	intel_context_get(ce);
 
 	/* everything should already be activated by intel_context_pre_pin() */
-	err = __ring_active(ce->ring);
-	if (GEM_WARN_ON(err))
-		goto err_put;
+	GEM_WARN_ON(!i915_active_acquire_if_busy(&ce->ring->vma->active));
+	__intel_ring_pin(ce->ring);
 
-	err = intel_timeline_pin(ce->timeline);
-	if (GEM_WARN_ON(err))
-		goto err_ring;
+	__intel_timeline_pin(ce->timeline);
 
 	if (ce->state) {
 		GEM_WARN_ON(!i915_active_acquire_if_busy(&ce->state->active));
@@ -321,12 +344,6 @@ static int __intel_context_active(struct i915_active *active)
 	}
 
 	return 0;
-
-err_ring:
-	__ring_retire(ce->ring);
-err_put:
-	intel_context_put(ce);
-	return err;
 }
 
 void
diff --git a/drivers/gpu/drm/i915/gt/intel_context.h b/drivers/gpu/drm/i915/gt/intel_context.h
index 07be021882cc..fda2eba81e22 100644
--- a/drivers/gpu/drm/i915/gt/intel_context.h
+++ b/drivers/gpu/drm/i915/gt/intel_context.h
@@ -25,6 +25,8 @@
 		     ##__VA_ARGS__);					\
 } while (0)
 
+struct i915_gem_ww_ctx;
+
 void intel_context_init(struct intel_context *ce,
 			struct intel_engine_cs *engine);
 void intel_context_fini(struct intel_context *ce);
@@ -81,6 +83,8 @@ static inline void intel_context_unlock_pinned(struct intel_context *ce)
 }
 
 int __intel_context_do_pin(struct intel_context *ce);
+int __intel_context_do_pin_ww(struct intel_context *ce,
+			      struct i915_gem_ww_ctx *ww);
 
 static inline bool intel_context_pin_if_active(struct intel_context *ce)
 {
@@ -95,6 +99,15 @@ static inline int intel_context_pin(struct intel_context *ce)
 	return __intel_context_do_pin(ce);
 }
 
+static inline int intel_context_pin_ww(struct intel_context *ce,
+				       struct i915_gem_ww_ctx *ww)
+{
+	if (likely(intel_context_pin_if_active(ce)))
+		return 0;
+
+	return __intel_context_do_pin_ww(ce, ww);
+}
+
 static inline void __intel_context_pin(struct intel_context *ce)
 {
 	GEM_BUG_ON(!intel_context_is_pinned(ce));
diff --git a/drivers/gpu/drm/i915/gt/intel_context_types.h b/drivers/gpu/drm/i915/gt/intel_context_types.h
index 395af0476a4e..2347fe787158 100644
--- a/drivers/gpu/drm/i915/gt/intel_context_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_context_types.h
@@ -23,6 +23,7 @@
 DECLARE_EWMA(runtime, 3, 8);
 
 struct i915_gem_context;
+struct i915_gem_ww_ctx;
 struct i915_vma;
 struct intel_context;
 struct intel_ring;
@@ -30,7 +31,7 @@ struct intel_ring;
 struct intel_context_ops {
 	int (*alloc)(struct intel_context *ce);
 
-	int (*pre_pin)(struct intel_context *ce, void **vaddr);
+	int (*pre_pin)(struct intel_context *ce, struct i915_gem_ww_ctx *ww, void **vaddr);
 	int (*pin)(struct intel_context *ce, void *vaddr);
 	void (*unpin)(struct intel_context *ce);
 	void (*post_unpin)(struct intel_context *ce);
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
index 977e23fac5ce..8a60aa6a4470 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
@@ -558,7 +558,7 @@ static int pin_ggtt_status_page(struct intel_engine_cs *engine,
 	else
 		flags = PIN_HIGH;
 
-	return i915_ggtt_pin(vma, 0, flags);
+	return i915_ggtt_pin(vma, NULL, 0, flags);
 }
 
 static int init_status_page(struct intel_engine_cs *engine)
diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c
index c11e89472ad8..c7c33d87b400 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt.c
@@ -344,7 +344,7 @@ static int intel_gt_init_scratch(struct intel_gt *gt, unsigned int size)
 		goto err_unref;
 	}
 
-	ret = i915_ggtt_pin(vma, 0, PIN_HIGH);
+	ret = i915_ggtt_pin(vma, NULL, 0, PIN_HIGH);
 	if (ret)
 		goto err_unref;
 
diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
index 081f7dad43b4..ead9ece22a4c 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -3143,7 +3143,8 @@ __execlists_update_reg_state(const struct intel_context *ce,
 }
 
 static int
-execlists_context_pre_pin(struct intel_context *ce, void **vaddr)
+execlists_context_pre_pin(struct intel_context *ce,
+			  struct i915_gem_ww_ctx *ww, void **vaddr)
 {
 	GEM_BUG_ON(!ce->state);
 	GEM_BUG_ON(!i915_vma_is_pinned(ce->state));
@@ -3505,7 +3506,7 @@ static int lrc_setup_wa_ctx(struct intel_engine_cs *engine)
 		goto err;
 	}
 
-	err = i915_ggtt_pin(vma, 0, PIN_HIGH);
+	err = i915_ggtt_pin(vma, NULL, 0, PIN_HIGH);
 	if (err)
 		goto err;
 
diff --git a/drivers/gpu/drm/i915/gt/intel_renderstate.c b/drivers/gpu/drm/i915/gt/intel_renderstate.c
index 5e980642e479..b954d0807b4b 100644
--- a/drivers/gpu/drm/i915/gt/intel_renderstate.c
+++ b/drivers/gpu/drm/i915/gt/intel_renderstate.c
@@ -195,7 +195,7 @@ int intel_renderstate_init(struct intel_renderstate *so,
 
 	i915_gem_ww_ctx_init(&so->ww, true);
 retry:
-	err = intel_context_pin(ce);
+	err = intel_context_pin_ww(ce, &so->ww);
 	if (err)
 		goto err_fini;
 
diff --git a/drivers/gpu/drm/i915/gt/intel_ring.c b/drivers/gpu/drm/i915/gt/intel_ring.c
index 8cda1b7e17ba..71b404973ce1 100644
--- a/drivers/gpu/drm/i915/gt/intel_ring.c
+++ b/drivers/gpu/drm/i915/gt/intel_ring.c
@@ -21,7 +21,13 @@ unsigned int intel_ring_update_space(struct intel_ring *ring)
 	return space;
 }
 
-int intel_ring_pin(struct intel_ring *ring)
+void __intel_ring_pin(struct intel_ring *ring)
+{
+	GEM_BUG_ON(!atomic_read(&ring->pin_count));
+	atomic_inc(&ring->pin_count);
+}
+
+int intel_ring_pin(struct intel_ring *ring, struct i915_gem_ww_ctx *ww)
 {
 	struct i915_vma *vma = ring->vma;
 	unsigned int flags;
@@ -39,7 +45,7 @@ int intel_ring_pin(struct intel_ring *ring)
 	else
 		flags |= PIN_HIGH;
 
-	ret = i915_ggtt_pin(vma, 0, flags);
+	ret = i915_ggtt_pin(vma, ww, 0, flags);
 	if (unlikely(ret))
 		goto err_unpin;
 
diff --git a/drivers/gpu/drm/i915/gt/intel_ring.h b/drivers/gpu/drm/i915/gt/intel_ring.h
index 5bdce24994aa..48a2c327efb3 100644
--- a/drivers/gpu/drm/i915/gt/intel_ring.h
+++ b/drivers/gpu/drm/i915/gt/intel_ring.h
@@ -21,7 +21,8 @@ int intel_ring_cacheline_align(struct i915_request *rq);
 
 unsigned int intel_ring_update_space(struct intel_ring *ring);
 
-int intel_ring_pin(struct intel_ring *ring);
+void __intel_ring_pin(struct intel_ring *ring);
+int intel_ring_pin(struct intel_ring *ring, struct i915_gem_ww_ctx *ww);
 void intel_ring_unpin(struct intel_ring *ring);
 void intel_ring_reset(struct intel_ring *ring, u32 tail);
 
diff --git a/drivers/gpu/drm/i915/gt/intel_ring_submission.c b/drivers/gpu/drm/i915/gt/intel_ring_submission.c
index d89475b8cfd6..be60e96b5d1b 100644
--- a/drivers/gpu/drm/i915/gt/intel_ring_submission.c
+++ b/drivers/gpu/drm/i915/gt/intel_ring_submission.c
@@ -1184,14 +1184,16 @@ static void ring_context_destroy(struct kref *ref)
 	intel_context_free(ce);
 }
 
-static int __context_pin_ppgtt(struct intel_context *ce)
+static int ring_context_pre_pin(struct intel_context *ce,
+				struct i915_gem_ww_ctx *ww,
+				void **unused)
 {
 	struct i915_address_space *vm;
 	int err = 0;
 
 	vm = vm_alias(ce->vm);
 	if (vm)
-		err = gen6_ppgtt_pin(i915_vm_to_ppgtt((vm)));
+		err = gen6_ppgtt_pin(i915_vm_to_ppgtt((vm)), ww);
 
 	return err;
 }
@@ -1307,11 +1309,6 @@ static int ring_context_alloc(struct intel_context *ce)
 	return 0;
 }
 
-static int ring_context_pre_pin(struct intel_context *ce, void **unused)
-{
-	return __context_pin_ppgtt(ce);
-}
-
 static int ring_context_pin(struct intel_context *ce, void *unused)
 {
 	return 0;
@@ -2082,7 +2079,7 @@ int intel_ring_submission_setup(struct intel_engine_cs *engine)
 	}
 	GEM_BUG_ON(timeline->has_initial_breadcrumb);
 
-	err = intel_timeline_pin(timeline);
+	err = intel_timeline_pin(timeline, NULL);
 	if (err)
 		goto err_timeline;
 
@@ -2092,7 +2089,7 @@ int intel_ring_submission_setup(struct intel_engine_cs *engine)
 		goto err_timeline_unpin;
 	}
 
-	err = intel_ring_pin(ring);
+	err = intel_ring_pin(ring, NULL);
 	if (err)
 		goto err_ring;
 
diff --git a/drivers/gpu/drm/i915/gt/intel_timeline.c b/drivers/gpu/drm/i915/gt/intel_timeline.c
index 3779c2ae0d65..0ba4affb9fc6 100644
--- a/drivers/gpu/drm/i915/gt/intel_timeline.c
+++ b/drivers/gpu/drm/i915/gt/intel_timeline.c
@@ -313,14 +313,20 @@ intel_timeline_create(struct intel_gt *gt, struct i915_vma *global_hwsp)
 	return timeline;
 }
 
-int intel_timeline_pin(struct intel_timeline *tl)
+void __intel_timeline_pin(struct intel_timeline *tl)
+{
+	GEM_BUG_ON(!atomic_read(&tl->pin_count));
+	atomic_inc(&tl->pin_count);
+}
+
+int intel_timeline_pin(struct intel_timeline *tl, struct i915_gem_ww_ctx *ww)
 {
 	int err;
 
 	if (atomic_add_unless(&tl->pin_count, 1, 0))
 		return 0;
 
-	err = i915_ggtt_pin(tl->hwsp_ggtt, 0, PIN_HIGH);
+	err = i915_ggtt_pin(tl->hwsp_ggtt, ww, 0, PIN_HIGH);
 	if (err)
 		return err;
 
@@ -445,7 +451,7 @@ __intel_timeline_get_seqno(struct intel_timeline *tl,
 		goto err_rollback;
 	}
 
-	err = i915_ggtt_pin(vma, 0, PIN_HIGH);
+	err = i915_ggtt_pin(vma, NULL, 0, PIN_HIGH);
 	if (err) {
 		__idle_hwsp_free(vma->private, cacheline);
 		goto err_rollback;
diff --git a/drivers/gpu/drm/i915/gt/intel_timeline.h b/drivers/gpu/drm/i915/gt/intel_timeline.h
index f5b7eade3809..39dd897ad057 100644
--- a/drivers/gpu/drm/i915/gt/intel_timeline.h
+++ b/drivers/gpu/drm/i915/gt/intel_timeline.h
@@ -76,7 +76,8 @@ static inline bool intel_timeline_sync_is_later(struct intel_timeline *tl,
 	return __intel_timeline_sync_is_later(tl, fence->context, fence->seqno);
 }
 
-int intel_timeline_pin(struct intel_timeline *tl);
+void __intel_timeline_pin(struct intel_timeline *tl);
+int intel_timeline_pin(struct intel_timeline *tl, struct i915_gem_ww_ctx *ww);
 void intel_timeline_enter(struct intel_timeline *tl);
 int intel_timeline_get_seqno(struct intel_timeline *tl,
 			     struct i915_request *rq,
diff --git a/drivers/gpu/drm/i915/gt/mock_engine.c b/drivers/gpu/drm/i915/gt/mock_engine.c
index 9ec42769e46e..e986cc15081d 100644
--- a/drivers/gpu/drm/i915/gt/mock_engine.c
+++ b/drivers/gpu/drm/i915/gt/mock_engine.c
@@ -169,7 +169,8 @@ static int mock_context_alloc(struct intel_context *ce)
 	return 0;
 }
 
-static int mock_context_pre_pin(struct intel_context *ce, void **unused)
+static int mock_context_pre_pin(struct intel_context *ce,
+				struct i915_gem_ww_ctx *ww, void **unused)
 {
 	return 0;
 }
diff --git a/drivers/gpu/drm/i915/gt/selftest_timeline.c b/drivers/gpu/drm/i915/gt/selftest_timeline.c
index c2578a0f2f14..00801549871a 100644
--- a/drivers/gpu/drm/i915/gt/selftest_timeline.c
+++ b/drivers/gpu/drm/i915/gt/selftest_timeline.c
@@ -454,7 +454,7 @@ tl_write(struct intel_timeline *tl, struct intel_engine_cs *engine, u32 value)
 	struct i915_request *rq;
 	int err;
 
-	err = intel_timeline_pin(tl);
+	err = intel_timeline_pin(tl, NULL);
 	if (err) {
 		rq = ERR_PTR(err);
 		goto out;
@@ -664,7 +664,7 @@ static int live_hwsp_wrap(void *arg)
 	if (!tl->has_initial_breadcrumb || !tl->hwsp_cacheline)
 		goto out_free;
 
-	err = intel_timeline_pin(tl);
+	err = intel_timeline_pin(tl, NULL);
 	if (err)
 		goto out_free;
 
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
index 861657897c0f..942c7c187adb 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
@@ -677,7 +677,7 @@ struct i915_vma *intel_guc_allocate_vma(struct intel_guc *guc, u32 size)
 		goto err;
 
 	flags = PIN_OFFSET_BIAS | i915_ggtt_pin_bias(vma);
-	ret = i915_ggtt_pin(vma, 0, flags);
+	ret = i915_ggtt_pin(vma, NULL, 0, flags);
 	if (ret) {
 		vma = ERR_PTR(ret);
 		goto err;
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index e9ee4daa9320..12c1a1302e91 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1729,11 +1729,18 @@ static inline void i915_gem_drain_workqueue(struct drm_i915_private *i915)
 }
 
 struct i915_vma * __must_check
+i915_gem_object_ggtt_pin_ww(struct drm_i915_gem_object *obj,
+			    struct i915_gem_ww_ctx *ww,
+			    const struct i915_ggtt_view *view,
+			    u64 size, u64 alignment, u64 flags);
+
+static inline struct i915_vma * __must_check
 i915_gem_object_ggtt_pin(struct drm_i915_gem_object *obj,
 			 const struct i915_ggtt_view *view,
-			 u64 size,
-			 u64 alignment,
-			 u64 flags);
+			 u64 size, u64 alignment, u64 flags)
+{
+	return i915_gem_object_ggtt_pin_ww(obj, NULL, view, size, alignment, flags);
+}
 
 int i915_gem_object_unbind(struct drm_i915_gem_object *obj,
 			   unsigned long flags);
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 6846241f9079..f7173aa1c41b 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -950,11 +950,10 @@ void i915_gem_runtime_suspend(struct drm_i915_private *i915)
 }
 
 struct i915_vma *
-i915_gem_object_ggtt_pin(struct drm_i915_gem_object *obj,
-			 const struct i915_ggtt_view *view,
-			 u64 size,
-			 u64 alignment,
-			 u64 flags)
+i915_gem_object_ggtt_pin_ww(struct drm_i915_gem_object *obj,
+			    struct i915_gem_ww_ctx *ww,
+			    const struct i915_ggtt_view *view,
+			    u64 size, u64 alignment, u64 flags)
 {
 	struct drm_i915_private *i915 = to_i915(obj->base.dev);
 	struct i915_ggtt *ggtt = &i915->ggtt;
@@ -1014,7 +1013,7 @@ i915_gem_object_ggtt_pin(struct drm_i915_gem_object *obj,
 			return ERR_PTR(ret);
 	}
 
-	ret = i915_vma_pin(vma, size, alignment, flags | PIN_GLOBAL);
+	ret = i915_vma_pin_ww(vma, ww, size, alignment, flags | PIN_GLOBAL);
 	if (ret)
 		return ERR_PTR(ret);
 
diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c
index 6cc2d9c44015..e9d30ab5da6b 100644
--- a/drivers/gpu/drm/i915/i915_vma.c
+++ b/drivers/gpu/drm/i915/i915_vma.c
@@ -857,13 +857,19 @@ static void vma_unbind_pages(struct i915_vma *vma)
 	__vma_put_pages(vma, count | count << I915_VMA_PAGES_BIAS);
 }
 
-int i915_vma_pin(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
+int i915_vma_pin_ww(struct i915_vma *vma, struct i915_gem_ww_ctx *ww,
+		    u64 size, u64 alignment, u64 flags)
 {
 	struct i915_vma_work *work = NULL;
 	intel_wakeref_t wakeref = 0;
 	unsigned int bound;
 	int err;
 
+#ifdef CONFIG_PROVE_LOCKING
+	if (debug_locks && lockdep_is_held(&vma->vm->i915->drm.struct_mutex))
+		WARN_ON(!ww);
+#endif
+
 	BUILD_BUG_ON(PIN_GLOBAL != I915_VMA_GLOBAL_BIND);
 	BUILD_BUG_ON(PIN_USER != I915_VMA_LOCAL_BIND);
 
@@ -994,7 +1000,8 @@ static void flush_idle_contexts(struct intel_gt *gt)
 	intel_gt_wait_for_idle(gt, MAX_SCHEDULE_TIMEOUT);
 }
 
-int i915_ggtt_pin(struct i915_vma *vma, u32 align, unsigned int flags)
+int i915_ggtt_pin(struct i915_vma *vma, struct i915_gem_ww_ctx *ww,
+		  u32 align, unsigned int flags)
 {
 	struct i915_address_space *vm = vma->vm;
 	int err;
@@ -1002,7 +1009,7 @@ int i915_ggtt_pin(struct i915_vma *vma, u32 align, unsigned int flags)
 	GEM_BUG_ON(!i915_vma_is_ggtt(vma));
 
 	do {
-		err = i915_vma_pin(vma, 0, align, flags | PIN_GLOBAL);
+		err = i915_vma_pin_ww(vma, ww, 0, align, flags | PIN_GLOBAL);
 		if (err != -ENOSPC) {
 			if (!err) {
 				err = i915_vma_wait_for_bind(vma);
diff --git a/drivers/gpu/drm/i915/i915_vma.h b/drivers/gpu/drm/i915/i915_vma.h
index 8ad1daabcd58..2e3779a8a437 100644
--- a/drivers/gpu/drm/i915/i915_vma.h
+++ b/drivers/gpu/drm/i915/i915_vma.h
@@ -236,8 +236,17 @@ static inline void i915_vma_unlock(struct i915_vma *vma)
 }
 
 int __must_check
-i915_vma_pin(struct i915_vma *vma, u64 size, u64 alignment, u64 flags);
-int i915_ggtt_pin(struct i915_vma *vma, u32 align, unsigned int flags);
+i915_vma_pin_ww(struct i915_vma *vma, struct i915_gem_ww_ctx *ww,
+		u64 size, u64 alignment, u64 flags);
+
+static inline int __must_check
+i915_vma_pin(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
+{
+	return i915_vma_pin_ww(vma, NULL, size, alignment, flags);
+}
+
+int i915_ggtt_pin(struct i915_vma *vma, struct i915_gem_ww_ctx *ww,
+		  u32 align, unsigned int flags);
 
 static inline int i915_vma_pin_count(const struct i915_vma *vma)
 {
-- 
2.25.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

[Intel-gfx] [PATCH 14/23] drm/i915: Convert i915_gem_object/client_blt.c to use ww locking as well, v2.

[Maarten Lankhorst]

This is the last part outside of selftests that still don't use the
correct lock ordering of timeline->mutex vs resv_lock.

With gem fixed, there are a few places that still get locking wrong:
- gvt/scheduler.c
- i915_perf.c
- Most if not all selftests.

Changes since v1:
- Add intel_engine_pm_get/put() calls to fix use-after-free when using
  intel_engine_get_pool().

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 .../gpu/drm/i915/gem/i915_gem_client_blt.c    |  80 +++++++--
 .../gpu/drm/i915/gem/i915_gem_object_blt.c    | 156 +++++++++++-------
 .../gpu/drm/i915/gem/i915_gem_object_blt.h    |   3 +
 3 files changed, 165 insertions(+), 74 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_client_blt.c b/drivers/gpu/drm/i915/gem/i915_gem_client_blt.c
index 5d94a77f9bdd..10df576e785f 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_client_blt.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_client_blt.c
@@ -157,6 +157,7 @@ static void clear_pages_worker(struct work_struct *work)
 	struct clear_pages_work *w = container_of(work, typeof(*w), work);
 	struct drm_i915_gem_object *obj = w->sleeve->vma->obj;
 	struct i915_vma *vma = w->sleeve->vma;
+	struct i915_gem_ww_ctx ww;
 	struct i915_request *rq;
 	struct i915_vma *batch;
 	int err = w->dma.error;
@@ -172,17 +173,20 @@ static void clear_pages_worker(struct work_struct *work)
 	obj->read_domains = I915_GEM_GPU_DOMAINS;
 	obj->write_domain = 0;
 
-	err = i915_vma_pin(vma, 0, 0, PIN_USER);
-	if (unlikely(err))
+	i915_gem_ww_ctx_init(&ww, false);
+	intel_engine_pm_get(w->ce->engine);
+retry:
+	err = intel_context_pin_ww(w->ce, &ww);
+	if (err)
 		goto out_signal;
 
-	batch = intel_emit_vma_fill_blt(w->ce, vma, w->value);
+	batch = intel_emit_vma_fill_blt(w->ce, vma, &ww, w->value);
 	if (IS_ERR(batch)) {
 		err = PTR_ERR(batch);
-		goto out_unpin;
+		goto out_ctx;
 	}
 
-	rq = intel_context_create_request(w->ce);
+	rq = i915_request_create(w->ce);
 	if (IS_ERR(rq)) {
 		err = PTR_ERR(rq);
 		goto out_batch;
@@ -224,9 +228,19 @@ static void clear_pages_worker(struct work_struct *work)
 	i915_request_add(rq);
 out_batch:
 	intel_emit_vma_release(w->ce, batch);
-out_unpin:
-	i915_vma_unpin(vma);
+out_ctx:
+	intel_context_unpin(w->ce);
 out_signal:
+	if (err == -EDEADLK) {
+		err = i915_gem_ww_ctx_backoff(&ww);
+		if (!err)
+			goto retry;
+	}
+	i915_gem_ww_ctx_fini(&ww);
+
+	i915_vma_unpin(w->sleeve->vma);
+	intel_engine_pm_put(w->ce->engine);
+
 	if (unlikely(err)) {
 		dma_fence_set_error(&w->dma, err);
 		dma_fence_signal(&w->dma);
@@ -234,6 +248,45 @@ static void clear_pages_worker(struct work_struct *work)
 	}
 }
 
+static int pin_wait_clear_pages_work(struct clear_pages_work *w,
+				     struct intel_context *ce)
+{
+	struct i915_vma *vma = w->sleeve->vma;
+	struct i915_gem_ww_ctx ww;
+	int err;
+
+	i915_gem_ww_ctx_init(&ww, false);
+retry:
+	err = i915_gem_object_lock(vma->obj, &ww);
+	if (err)
+		goto out;
+
+	err = i915_vma_pin_ww(vma, &ww, 0, 0, PIN_USER);
+	if (unlikely(err))
+		goto out;
+
+	err = i915_sw_fence_await_reservation(&w->wait,
+					      vma->obj->base.resv, NULL,
+					      true, I915_FENCE_TIMEOUT,
+					      I915_FENCE_GFP);
+	if (err)
+		goto err_unpin_vma;
+
+	dma_resv_add_excl_fence(vma->obj->base.resv, &w->dma);
+
+err_unpin_vma:
+	if (err)
+		i915_vma_unpin(vma);
+out:
+	if (err == -EDEADLK) {
+		err = i915_gem_ww_ctx_backoff(&ww);
+		if (!err)
+			goto retry;
+	}
+	i915_gem_ww_ctx_fini(&ww);
+	return err;
+}
+
 static int __i915_sw_fence_call
 clear_pages_work_notify(struct i915_sw_fence *fence,
 			enum i915_sw_fence_notify state)
@@ -287,18 +340,9 @@ int i915_gem_schedule_fill_pages_blt(struct drm_i915_gem_object *obj,
 	dma_fence_init(&work->dma, &clear_pages_work_ops, &fence_lock, 0, 0);
 	i915_sw_fence_init(&work->wait, clear_pages_work_notify);
 
-	i915_gem_object_lock(obj, NULL);
-	err = i915_sw_fence_await_reservation(&work->wait,
-					      obj->base.resv, NULL,
-					      true, I915_FENCE_TIMEOUT,
-					      I915_FENCE_GFP);
-	if (err < 0) {
+	err = pin_wait_clear_pages_work(work, ce);
+	if (err < 0)
 		dma_fence_set_error(&work->dma, err);
-	} else {
-		dma_resv_add_excl_fence(obj->base.resv, &work->dma);
-		err = 0;
-	}
-	i915_gem_object_unlock(obj);
 
 	dma_fence_get(&work->dma);
 	i915_sw_fence_commit(&work->wait);
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object_blt.c b/drivers/gpu/drm/i915/gem/i915_gem_object_blt.c
index dfb0601802bc..9641bdceb67b 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object_blt.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object_blt.c
@@ -14,6 +14,7 @@
 
 struct i915_vma *intel_emit_vma_fill_blt(struct intel_context *ce,
 					 struct i915_vma *vma,
+					 struct i915_gem_ww_ctx *ww,
 					 u32 value)
 {
 	struct drm_i915_private *i915 = ce->vm->i915;
@@ -39,10 +40,24 @@ struct i915_vma *intel_emit_vma_fill_blt(struct intel_context *ce,
 		goto out_pm;
 	}
 
+	err = i915_gem_object_lock(pool->obj, ww);
+	if (err)
+		goto out_put;
+
+	batch = i915_vma_instance(pool->obj, ce->vm, NULL);
+	if (IS_ERR(batch)) {
+		err = PTR_ERR(batch);
+		goto out_put;
+	}
+
+	err = i915_vma_pin_ww(batch, ww, 0, 0, PIN_USER);
+	if (unlikely(err))
+		goto out_put;
+
 	cmd = i915_gem_object_pin_map(pool->obj, I915_MAP_WC);
 	if (IS_ERR(cmd)) {
 		err = PTR_ERR(cmd);
-		goto out_put;
+		goto out_unpin;
 	}
 
 	rem = vma->size;
@@ -82,19 +97,11 @@ struct i915_vma *intel_emit_vma_fill_blt(struct intel_context *ce,
 
 	i915_gem_object_unpin_map(pool->obj);
 
-	batch = i915_vma_instance(pool->obj, ce->vm, NULL);
-	if (IS_ERR(batch)) {
-		err = PTR_ERR(batch);
-		goto out_put;
-	}
-
-	err = i915_vma_pin(batch, 0, 0, PIN_USER);
-	if (unlikely(err))
-		goto out_put;
-
 	batch->private = pool;
 	return batch;
 
+out_unpin:
+	i915_vma_unpin(batch);
 out_put:
 	intel_engine_pool_put(pool);
 out_pm:
@@ -106,11 +113,9 @@ int intel_emit_vma_mark_active(struct i915_vma *vma, struct i915_request *rq)
 {
 	int err;
 
-	i915_vma_lock(vma);
 	err = i915_request_await_object(rq, vma->obj, false);
 	if (err == 0)
 		err = i915_vma_move_to_active(vma, rq, 0);
-	i915_vma_unlock(vma);
 	if (unlikely(err))
 		return err;
 
@@ -128,6 +133,7 @@ int i915_gem_object_fill_blt(struct drm_i915_gem_object *obj,
 			     struct intel_context *ce,
 			     u32 value)
 {
+	struct i915_gem_ww_ctx ww;
 	struct i915_request *rq;
 	struct i915_vma *batch;
 	struct i915_vma *vma;
@@ -137,23 +143,31 @@ int i915_gem_object_fill_blt(struct drm_i915_gem_object *obj,
 	if (IS_ERR(vma))
 		return PTR_ERR(vma);
 
-	err = i915_vma_pin(vma, 0, 0, PIN_USER);
-	if (unlikely(err))
-		return err;
+	i915_gem_ww_ctx_init(&ww, true);
+	intel_engine_pm_get(ce->engine);
+retry:
+	err = i915_gem_object_lock(obj, &ww);
+	if (err)
+		goto out;
+
+	err = intel_context_pin_ww(ce, &ww);
+	if (err)
+		goto out;
 
-	if (obj->cache_dirty & ~obj->cache_coherent) {
-		i915_gem_object_lock(obj, NULL);
+	err = i915_vma_pin_ww(vma, &ww, 0, 0, PIN_USER);
+	if (err)
+		goto out_ctx;
+
+	if (obj->cache_dirty & ~obj->cache_coherent)
 		i915_gem_clflush_object(obj, 0);
-		i915_gem_object_unlock(obj);
-	}
 
-	batch = intel_emit_vma_fill_blt(ce, vma, value);
+	batch = intel_emit_vma_fill_blt(ce, vma, &ww, value);
 	if (IS_ERR(batch)) {
 		err = PTR_ERR(batch);
-		goto out_unpin;
+		goto out_vma;
 	}
 
-	rq = intel_context_create_request(ce);
+	rq = i915_request_create(ce);
 	if (IS_ERR(rq)) {
 		err = PTR_ERR(rq);
 		goto out_batch;
@@ -173,11 +187,9 @@ int i915_gem_object_fill_blt(struct drm_i915_gem_object *obj,
 			goto out_request;
 	}
 
-	i915_vma_lock(vma);
 	err = i915_request_await_object(rq, vma->obj, true);
 	if (err == 0)
 		err = i915_vma_move_to_active(vma, rq, EXEC_OBJECT_WRITE);
-	i915_vma_unlock(vma);
 	if (unlikely(err))
 		goto out_request;
 
@@ -191,8 +203,18 @@ int i915_gem_object_fill_blt(struct drm_i915_gem_object *obj,
 	i915_request_add(rq);
 out_batch:
 	intel_emit_vma_release(ce, batch);
-out_unpin:
+out_vma:
 	i915_vma_unpin(vma);
+out_ctx:
+	intel_context_unpin(ce);
+out:
+	if (err == -EDEADLK) {
+		err = i915_gem_ww_ctx_backoff(&ww);
+		if (!err)
+			goto retry;
+	}
+	i915_gem_ww_ctx_fini(&ww);
+	intel_engine_pm_put(ce->engine);
 	return err;
 }
 
@@ -208,6 +230,7 @@ static bool wa_1209644611_applies(struct drm_i915_private *i915, u32 size)
 }
 
 struct i915_vma *intel_emit_vma_copy_blt(struct intel_context *ce,
+					 struct i915_gem_ww_ctx *ww,
 					 struct i915_vma *src,
 					 struct i915_vma *dst)
 {
@@ -234,10 +257,24 @@ struct i915_vma *intel_emit_vma_copy_blt(struct intel_context *ce,
 		goto out_pm;
 	}
 
+	err = i915_gem_object_lock(pool->obj, ww);
+	if (err)
+		goto out_put;
+
+	batch = i915_vma_instance(pool->obj, ce->vm, NULL);
+	if (IS_ERR(batch)) {
+		err = PTR_ERR(batch);
+		goto out_put;
+	}
+
+	err = i915_vma_pin_ww(batch, ww, 0, 0, PIN_USER);
+	if (unlikely(err))
+		goto out_put;
+
 	cmd = i915_gem_object_pin_map(pool->obj, I915_MAP_WC);
 	if (IS_ERR(cmd)) {
 		err = PTR_ERR(cmd);
-		goto out_put;
+		goto out_unpin;
 	}
 
 	rem = src->size;
@@ -293,19 +330,11 @@ struct i915_vma *intel_emit_vma_copy_blt(struct intel_context *ce,
 
 	i915_gem_object_unpin_map(pool->obj);
 
-	batch = i915_vma_instance(pool->obj, ce->vm, NULL);
-	if (IS_ERR(batch)) {
-		err = PTR_ERR(batch);
-		goto out_put;
-	}
-
-	err = i915_vma_pin(batch, 0, 0, PIN_USER);
-	if (unlikely(err))
-		goto out_put;
-
 	batch->private = pool;
 	return batch;
 
+out_unpin:
+	i915_vma_unpin(batch);
 out_put:
 	intel_engine_pool_put(pool);
 out_pm:
@@ -327,10 +356,9 @@ int i915_gem_object_copy_blt(struct drm_i915_gem_object *src,
 			     struct drm_i915_gem_object *dst,
 			     struct intel_context *ce)
 {
-	struct drm_gem_object *objs[] = { &src->base, &dst->base };
 	struct i915_address_space *vm = ce->vm;
 	struct i915_vma *vma[2], *batch;
-	struct ww_acquire_ctx acquire;
+	struct i915_gem_ww_ctx ww;
 	struct i915_request *rq;
 	int err, i;
 
@@ -338,25 +366,36 @@ int i915_gem_object_copy_blt(struct drm_i915_gem_object *src,
 	if (IS_ERR(vma[0]))
 		return PTR_ERR(vma[0]);
 
-	err = i915_vma_pin(vma[0], 0, 0, PIN_USER);
-	if (unlikely(err))
-		return err;
-
 	vma[1] = i915_vma_instance(dst, vm, NULL);
 	if (IS_ERR(vma[1]))
-		goto out_unpin_src;
+		return PTR_ERR(vma);
 
-	err = i915_vma_pin(vma[1], 0, 0, PIN_USER);
+	i915_gem_ww_ctx_init(&ww, true);
+	intel_engine_pm_get(ce->engine);
+retry:
+	err = i915_gem_object_lock(src, &ww);
+	if (!err)
+		err = i915_gem_object_lock(dst, &ww);
+	if (!err)
+		err = intel_context_pin_ww(ce, &ww);
+	if (err)
+		goto out;
+
+	err = i915_vma_pin_ww(vma[0], &ww, 0, 0, PIN_USER);
+	if (err)
+		goto out_ctx;
+
+	err = i915_vma_pin_ww(vma[1], &ww, 0, 0, PIN_USER);
 	if (unlikely(err))
 		goto out_unpin_src;
 
-	batch = intel_emit_vma_copy_blt(ce, vma[0], vma[1]);
+	batch = intel_emit_vma_copy_blt(ce, &ww, vma[0], vma[1]);
 	if (IS_ERR(batch)) {
 		err = PTR_ERR(batch);
 		goto out_unpin_dst;
 	}
 
-	rq = intel_context_create_request(ce);
+	rq = i915_request_create(ce);
 	if (IS_ERR(rq)) {
 		err = PTR_ERR(rq);
 		goto out_batch;
@@ -366,14 +405,10 @@ int i915_gem_object_copy_blt(struct drm_i915_gem_object *src,
 	if (unlikely(err))
 		goto out_request;
 
-	err = drm_gem_lock_reservations(objs, ARRAY_SIZE(objs), &acquire);
-	if (unlikely(err))
-		goto out_request;
-
 	for (i = 0; i < ARRAY_SIZE(vma); i++) {
 		err = move_to_gpu(vma[i], rq, i);
 		if (unlikely(err))
-			goto out_unlock;
+			goto out_request;
 	}
 
 	for (i = 0; i < ARRAY_SIZE(vma); i++) {
@@ -381,20 +416,19 @@ int i915_gem_object_copy_blt(struct drm_i915_gem_object *src,
 
 		err = i915_vma_move_to_active(vma[i], rq, flags);
 		if (unlikely(err))
-			goto out_unlock;
+			goto out_request;
 	}
 
 	if (rq->engine->emit_init_breadcrumb) {
 		err = rq->engine->emit_init_breadcrumb(rq);
 		if (unlikely(err))
-			goto out_unlock;
+			goto out_request;
 	}
 
 	err = rq->engine->emit_bb_start(rq,
 					batch->node.start, batch->node.size,
 					0);
-out_unlock:
-	drm_gem_unlock_reservations(objs, ARRAY_SIZE(objs), &acquire);
+
 out_request:
 	if (unlikely(err))
 		i915_request_set_error_once(rq, err);
@@ -406,6 +440,16 @@ int i915_gem_object_copy_blt(struct drm_i915_gem_object *src,
 	i915_vma_unpin(vma[1]);
 out_unpin_src:
 	i915_vma_unpin(vma[0]);
+out_ctx:
+	intel_context_unpin(ce);
+out:
+	if (err == -EDEADLK) {
+		err = i915_gem_ww_ctx_backoff(&ww);
+		if (!err)
+			goto retry;
+	}
+	i915_gem_ww_ctx_fini(&ww);
+	intel_engine_pm_put(ce->engine);
 	return err;
 }
 
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object_blt.h b/drivers/gpu/drm/i915/gem/i915_gem_object_blt.h
index 243a43a87824..cdb537076752 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object_blt.h
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object_blt.h
@@ -14,12 +14,15 @@
 #include "i915_vma.h"
 
 struct drm_i915_gem_object;
+struct i915_gem_ww_ctx;
 
 struct i915_vma *intel_emit_vma_fill_blt(struct intel_context *ce,
 					 struct i915_vma *vma,
+					 struct i915_gem_ww_ctx *ww,
 					 u32 value);
 
 struct i915_vma *intel_emit_vma_copy_blt(struct intel_context *ce,
+					 struct i915_gem_ww_ctx *ww,
 					 struct i915_vma *src,
 					 struct i915_vma *dst);
 
-- 
2.25.1

_______________________________________________
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https://lists.freedesktop.org/mailman/listinfo/intel-gfx

[Intel-gfx] [PATCH 15/23] drm/i915: Kill last user of intel_context_create_request outside of selftests

[Maarten Lankhorst]

Instead of using intel_context_create_request(), use intel_context_pin()
and i915_create_request directly.

Now all those calls are gone outside of selftests. :)

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 drivers/gpu/drm/i915/gt/intel_workarounds.c | 43 ++++++++++++++-------
 1 file changed, 29 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
index 5b1a03d2fd25..64f5962910f0 100644
--- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
@@ -1744,6 +1744,7 @@ static int engine_wa_list_verify(struct intel_context *ce,
 	const struct i915_wa *wa;
 	struct i915_request *rq;
 	struct i915_vma *vma;
+	struct i915_gem_ww_ctx ww;
 	unsigned int i;
 	u32 *results;
 	int err;
@@ -1756,29 +1757,34 @@ static int engine_wa_list_verify(struct intel_context *ce,
 		return PTR_ERR(vma);
 
 	intel_engine_pm_get(ce->engine);
-	rq = intel_context_create_request(ce);
-	intel_engine_pm_put(ce->engine);
+	i915_gem_ww_ctx_init(&ww, false);
+retry:
+	err = i915_gem_object_lock(vma->obj, &ww);
+	if (err == 0)
+		err = intel_context_pin_ww(ce, &ww);
+	if (err)
+		goto err_pm;
+
+	rq = i915_request_create(ce);
 	if (IS_ERR(rq)) {
 		err = PTR_ERR(rq);
-		goto err_vma;
+		goto err_unpin;
 	}
 
-	i915_vma_lock(vma);
 	err = i915_request_await_object(rq, vma->obj, true);
 	if (err == 0)
 		err = i915_vma_move_to_active(vma, rq, EXEC_OBJECT_WRITE);
-	i915_vma_unlock(vma);
-	if (err) {
-		i915_request_add(rq);
-		goto err_vma;
-	}
-
-	err = wa_list_srm(rq, wal, vma);
-	if (err)
-		goto err_vma;
+	if (err == 0)
+		err = wa_list_srm(rq, wal, vma);
 
 	i915_request_get(rq);
+	if (err)
+		i915_request_set_error_once(rq, err);
 	i915_request_add(rq);
+
+	if (err)
+		goto err_rq;
+
 	if (i915_request_wait(rq, 0, HZ / 5) < 0) {
 		err = -ETIME;
 		goto err_rq;
@@ -1803,7 +1809,16 @@ static int engine_wa_list_verify(struct intel_context *ce,
 
 err_rq:
 	i915_request_put(rq);
-err_vma:
+err_unpin:
+	intel_context_unpin(ce);
+err_pm:
+	if (err == -EDEADLK) {
+		err = i915_gem_ww_ctx_backoff(&ww);
+		if (!err)
+			goto retry;
+	}
+	i915_gem_ww_ctx_fini(&ww);
+	intel_engine_pm_put(ce->engine);
 	i915_vma_unpin(vma);
 	i915_vma_put(vma);
 	return err;
-- 
2.25.1

_______________________________________________
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https://lists.freedesktop.org/mailman/listinfo/intel-gfx

[Intel-gfx] [PATCH 16/23] drm/i915: Convert i915_perf to ww locking as well

[Maarten Lankhorst]

We have the ordering of timeline->mutex vs resv_lock wrong,
convert the i915_pin_vma and intel_context_pin as well to
future-proof this.

We may need to do future changes to do this more transaction-like,
and only get down to a single i915_gem_ww_ctx, but for now this
should work.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 drivers/gpu/drm/i915/i915_perf.c | 57 +++++++++++++++++++++++---------
 1 file changed, 42 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c
index 2f78b147bb2d..418bd3263960 100644
--- a/drivers/gpu/drm/i915/i915_perf.c
+++ b/drivers/gpu/drm/i915/i915_perf.c
@@ -1195,24 +1195,39 @@ static struct intel_context *oa_pin_context(struct i915_perf_stream *stream)
 	struct i915_gem_engines_iter it;
 	struct i915_gem_context *ctx = stream->ctx;
 	struct intel_context *ce;
-	int err;
+	struct i915_gem_ww_ctx ww;
+	int err = -ENODEV;
 
 	for_each_gem_engine(ce, i915_gem_context_lock_engines(ctx), it) {
 		if (ce->engine != stream->engine) /* first match! */
 			continue;
 
-		/*
-		 * As the ID is the gtt offset of the context's vma we
-		 * pin the vma to ensure the ID remains fixed.
-		 */
-		err = intel_context_pin(ce);
-		if (err == 0) {
-			stream->pinned_ctx = ce;
-			break;
-		}
+		err = 0;
+		break;
 	}
 	i915_gem_context_unlock_engines(ctx);
 
+	if (err)
+		return ERR_PTR(err);
+
+	i915_gem_ww_ctx_init(&ww, true);
+retry:
+	/*
+	 * As the ID is the gtt offset of the context's vma we
+	 * pin the vma to ensure the ID remains fixed.
+	 */
+	err = intel_context_pin_ww(ce, &ww);
+	if (err == -EDEADLK) {
+		err = i915_gem_ww_ctx_backoff(&ww);
+		if (!err)
+			goto retry;
+	}
+	i915_gem_ww_ctx_fini(&ww);
+
+	if (err)
+		return ERR_PTR(err);
+
+	stream->pinned_ctx = ce;
 	return stream->pinned_ctx;
 }
 
@@ -1927,15 +1942,22 @@ emit_oa_config(struct i915_perf_stream *stream,
 {
 	struct i915_request *rq;
 	struct i915_vma *vma;
+	struct i915_gem_ww_ctx ww;
 	int err;
 
 	vma = get_oa_vma(stream, oa_config);
 	if (IS_ERR(vma))
 		return PTR_ERR(vma);
 
-	err = i915_vma_pin(vma, 0, 0, PIN_GLOBAL | PIN_HIGH);
+	i915_gem_ww_ctx_init(&ww, true);
+retry:
+	err = i915_gem_object_lock(vma->obj, &ww);
+	if (err)
+		goto err;
+
+	err = i915_vma_pin_ww(vma, &ww, 0, 0, PIN_GLOBAL | PIN_HIGH);
 	if (err)
-		goto err_vma_put;
+		goto err;
 
 	intel_engine_pm_get(ce->engine);
 	rq = i915_request_create(ce);
@@ -1957,11 +1979,9 @@ emit_oa_config(struct i915_perf_stream *stream,
 			goto err_add_request;
 	}
 
-	i915_vma_lock(vma);
 	err = i915_request_await_object(rq, vma->obj, 0);
 	if (!err)
 		err = i915_vma_move_to_active(vma, rq, 0);
-	i915_vma_unlock(vma);
 	if (err)
 		goto err_add_request;
 
@@ -1975,7 +1995,14 @@ emit_oa_config(struct i915_perf_stream *stream,
 	i915_request_add(rq);
 err_vma_unpin:
 	i915_vma_unpin(vma);
-err_vma_put:
+err:
+	if (err == -EDEADLK) {
+		err = i915_gem_ww_ctx_backoff(&ww);
+		if (!err)
+			goto retry;
+	}
+
+	i915_gem_ww_ctx_fini(&ww);
 	i915_vma_put(vma);
 	return err;
 }
-- 
2.25.1

_______________________________________________
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https://lists.freedesktop.org/mailman/listinfo/intel-gfx

[Intel-gfx] [PATCH 17/23] drm/i915: Dirty hack to fix selftests locking inversion

[Maarten Lankhorst]

Some i915 selftests still use i915_vma_lock() as inner lock, and
intel_context_create_request() intel_timeline->mutex as outer lock.
Fortunately for selftests this is not an issue, they should be fixed
but we can move ahead and cleanify lockdep now.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 drivers/gpu/drm/i915/gt/intel_context.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/intel_context.c b/drivers/gpu/drm/i915/gt/intel_context.c
index 64948386630f..fe9fff5a63b1 100644
--- a/drivers/gpu/drm/i915/gt/intel_context.c
+++ b/drivers/gpu/drm/i915/gt/intel_context.c
@@ -459,6 +459,18 @@ struct i915_request *intel_context_create_request(struct intel_context *ce)
 	rq = i915_request_create(ce);
 	intel_context_unpin(ce);
 
+	if (IS_ERR(rq))
+		return rq;
+
+	/*
+	 * timeline->mutex should be the inner lock, but is used as outer lock.
+	 * Hack around this to shut up lockdep in selftests..
+	 */
+	lockdep_unpin_lock(&ce->timeline->mutex, rq->cookie);
+	mutex_release(&ce->timeline->mutex.dep_map, _RET_IP_);
+	mutex_acquire(&ce->timeline->mutex.dep_map, SINGLE_DEPTH_NESTING, 0, _RET_IP_);
+	rq->cookie = lockdep_pin_lock(&ce->timeline->mutex);
+
 	return rq;
 }
 
-- 
2.25.1

_______________________________________________
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[Intel-gfx] [PATCH 18/23] drm/i915/selftests: Fix locking inversion in lrc selftest.

[Maarten Lankhorst]

This function does not use intel_context_create_request, so it has
to use the same locking order as normal code. This is required to
shut up lockdep in selftests.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 drivers/gpu/drm/i915/gt/selftest_lrc.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/selftest_lrc.c b/drivers/gpu/drm/i915/gt/selftest_lrc.c
index a9ccfae54c24..d7b6b94e5f55 100644
--- a/drivers/gpu/drm/i915/gt/selftest_lrc.c
+++ b/drivers/gpu/drm/i915/gt/selftest_lrc.c
@@ -4307,6 +4307,7 @@ static int __live_lrc_state(struct intel_engine_cs *engine,
 {
 	struct intel_context *ce;
 	struct i915_request *rq;
+	struct i915_gem_ww_ctx ww;
 	enum {
 		RING_START_IDX = 0,
 		RING_TAIL_IDX,
@@ -4321,7 +4322,11 @@ static int __live_lrc_state(struct intel_engine_cs *engine,
 	if (IS_ERR(ce))
 		return PTR_ERR(ce);
 
-	err = intel_context_pin(ce);
+	i915_gem_ww_ctx_init(&ww, false);
+retry:
+	err = i915_gem_object_lock(scratch->obj, &ww);
+	if (!err)
+		err = intel_context_pin_ww(ce, &ww);
 	if (err)
 		goto err_put;
 
@@ -4350,11 +4355,9 @@ static int __live_lrc_state(struct intel_engine_cs *engine,
 	*cs++ = i915_ggtt_offset(scratch) + RING_TAIL_IDX * sizeof(u32);
 	*cs++ = 0;
 
-	i915_vma_lock(scratch);
 	err = i915_request_await_object(rq, scratch->obj, true);
 	if (!err)
 		err = i915_vma_move_to_active(scratch, rq, EXEC_OBJECT_WRITE);
-	i915_vma_unlock(scratch);
 
 	i915_request_get(rq);
 	i915_request_add(rq);
@@ -4391,6 +4394,12 @@ static int __live_lrc_state(struct intel_engine_cs *engine,
 err_unpin:
 	intel_context_unpin(ce);
 err_put:
+	if (err == -EDEADLK) {
+		err = i915_gem_ww_ctx_backoff(&ww);
+		if (!err)
+			goto retry;
+	}
+	i915_gem_ww_ctx_fini(&ww);
 	intel_context_put(ce);
 	return err;
 }
-- 
2.25.1

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[Intel-gfx] [PATCH 19/23] drm/i915: Use ww pinning for intel_context_create_request()

[Maarten Lankhorst]

We want to get rid of intel_context_pin(), convert
intel_context_create_request() first. :)

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 drivers/gpu/drm/i915/gt/intel_context.c | 20 +++++++++++++++-----
 1 file changed, 15 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_context.c b/drivers/gpu/drm/i915/gt/intel_context.c
index fe9fff5a63b1..e148e2d69ae1 100644
--- a/drivers/gpu/drm/i915/gt/intel_context.c
+++ b/drivers/gpu/drm/i915/gt/intel_context.c
@@ -449,15 +449,25 @@ int intel_context_prepare_remote_request(struct intel_context *ce,
 
 struct i915_request *intel_context_create_request(struct intel_context *ce)
 {
+	struct i915_gem_ww_ctx ww;
 	struct i915_request *rq;
 	int err;
 
-	err = intel_context_pin(ce);
-	if (unlikely(err))
-		return ERR_PTR(err);
+	i915_gem_ww_ctx_init(&ww, true);
+retry:
+	err = intel_context_pin_ww(ce, &ww);
+	if (!err) {
+		rq = i915_request_create(ce);
+		intel_context_unpin(ce);
+	} else if (err == -EDEADLK) {
+		err = i915_gem_ww_ctx_backoff(&ww);
+		if (!err)
+			goto retry;
+	} else {
+		rq = ERR_PTR(err);
+	}
 
-	rq = i915_request_create(ce);
-	intel_context_unpin(ce);
+	i915_gem_ww_ctx_fini(&ww);
 
 	if (IS_ERR(rq))
 		return rq;
-- 
2.25.1

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[Intel-gfx] [PATCH 20/23] drm/i915: Move i915_vma_lock in the selftests to avoid lock inversion, v2.

[Maarten Lankhorst]

Make sure vma_lock is not used as inner lock when kernel context is used,
and add ww handling where appropriate.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 .../i915/gem/selftests/i915_gem_coherency.c   | 26 ++++++------
 .../drm/i915/gem/selftests/i915_gem_mman.c    | 41 ++++++++++++++-----
 drivers/gpu/drm/i915/selftests/i915_request.c | 18 +++++---
 3 files changed, 57 insertions(+), 28 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c
index 99f8466a108a..d93b7d9ad174 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c
@@ -199,25 +199,25 @@ static int gpu_set(struct context *ctx, unsigned long offset, u32 v)
 
 	i915_gem_object_lock(ctx->obj, NULL);
 	err = i915_gem_object_set_to_gtt_domain(ctx->obj, true);
-	i915_gem_object_unlock(ctx->obj);
 	if (err)
-		return err;
+		goto out_unlock;
 
 	vma = i915_gem_object_ggtt_pin(ctx->obj, NULL, 0, 0, 0);
-	if (IS_ERR(vma))
-		return PTR_ERR(vma);
+	if (IS_ERR(vma)) {
+		err = PTR_ERR(vma);
+		goto out_unlock;
+	}
 
 	rq = intel_engine_create_kernel_request(ctx->engine);
 	if (IS_ERR(rq)) {
-		i915_vma_unpin(vma);
-		return PTR_ERR(rq);
+		err = PTR_ERR(rq);
+		goto out_unpin;
 	}
 
 	cs = intel_ring_begin(rq, 4);
 	if (IS_ERR(cs)) {
-		i915_request_add(rq);
-		i915_vma_unpin(vma);
-		return PTR_ERR(cs);
+		err = PTR_ERR(cs);
+		goto out_rq;
 	}
 
 	if (INTEL_GEN(ctx->engine->i915) >= 8) {
@@ -238,14 +238,16 @@ static int gpu_set(struct context *ctx, unsigned long offset, u32 v)
 	}
 	intel_ring_advance(rq, cs);
 
-	i915_vma_lock(vma);
 	err = i915_request_await_object(rq, vma->obj, true);
 	if (err == 0)
 		err = i915_vma_move_to_active(vma, rq, EXEC_OBJECT_WRITE);
-	i915_vma_unlock(vma);
-	i915_vma_unpin(vma);
 
+out_rq:
 	i915_request_add(rq);
+out_unpin:
+	i915_vma_unpin(vma);
+out_unlock:
+	i915_gem_object_unlock(ctx->obj);
 
 	return err;
 }
diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
index eec58da734bd..c8b9343cc88c 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
@@ -528,31 +528,42 @@ static int make_obj_busy(struct drm_i915_gem_object *obj)
 	for_each_uabi_engine(engine, i915) {
 		struct i915_request *rq;
 		struct i915_vma *vma;
+		struct i915_gem_ww_ctx ww;
 		int err;
 
 		vma = i915_vma_instance(obj, &engine->gt->ggtt->vm, NULL);
 		if (IS_ERR(vma))
 			return PTR_ERR(vma);
 
-		err = i915_vma_pin(vma, 0, 0, PIN_USER);
+		i915_gem_ww_ctx_init(&ww, false);
+retry:
+		err = i915_gem_object_lock(obj, &ww);
+		if (!err)
+			err = i915_vma_pin_ww(vma, &ww, 0, 0, PIN_USER);
 		if (err)
-			return err;
+			goto err;
 
 		rq = intel_engine_create_kernel_request(engine);
 		if (IS_ERR(rq)) {
-			i915_vma_unpin(vma);
-			return PTR_ERR(rq);
+			err = PTR_ERR(rq);
+			goto err_unpin;
 		}
 
-		i915_vma_lock(vma);
 		err = i915_request_await_object(rq, vma->obj, true);
 		if (err == 0)
 			err = i915_vma_move_to_active(vma, rq,
 						      EXEC_OBJECT_WRITE);
-		i915_vma_unlock(vma);
 
 		i915_request_add(rq);
+err_unpin:
 		i915_vma_unpin(vma);
+err:
+		if (err == -EDEADLK) {
+			err = i915_gem_ww_ctx_backoff(&ww);
+			if (!err)
+				goto retry;
+		}
+		i915_gem_ww_ctx_fini(&ww);
 		if (err)
 			return err;
 	}
@@ -1000,6 +1011,7 @@ static int __igt_mmap_gpu(struct drm_i915_private *i915,
 	for_each_uabi_engine(engine, i915) {
 		struct i915_request *rq;
 		struct i915_vma *vma;
+		struct i915_gem_ww_ctx ww;
 
 		vma = i915_vma_instance(obj, engine->kernel_context->vm, NULL);
 		if (IS_ERR(vma)) {
@@ -1007,9 +1019,13 @@ static int __igt_mmap_gpu(struct drm_i915_private *i915,
 			goto out_unmap;
 		}
 
-		err = i915_vma_pin(vma, 0, 0, PIN_USER);
+		i915_gem_ww_ctx_init(&ww, false);
+retry:
+		err = i915_gem_object_lock(obj, &ww);
+		if (!err)
+			err = i915_vma_pin_ww(vma, &ww, 0, 0, PIN_USER);
 		if (err)
-			goto out_unmap;
+			goto out_ww;
 
 		rq = i915_request_create(engine->kernel_context);
 		if (IS_ERR(rq)) {
@@ -1017,11 +1033,9 @@ static int __igt_mmap_gpu(struct drm_i915_private *i915,
 			goto out_unpin;
 		}
 
-		i915_vma_lock(vma);
 		err = i915_request_await_object(rq, vma->obj, false);
 		if (err == 0)
 			err = i915_vma_move_to_active(vma, rq, 0);
-		i915_vma_unlock(vma);
 
 		err = engine->emit_bb_start(rq, vma->node.start, 0, 0);
 		i915_request_get(rq);
@@ -1043,6 +1057,13 @@ static int __igt_mmap_gpu(struct drm_i915_private *i915,
 
 out_unpin:
 		i915_vma_unpin(vma);
+out_ww:
+		if (err == -EDEADLK) {
+			err = i915_gem_ww_ctx_backoff(&ww);
+			if (!err)
+				goto retry;
+		}
+		i915_gem_ww_ctx_fini(&ww);
 		if (err)
 			goto out_unmap;
 	}
diff --git a/drivers/gpu/drm/i915/selftests/i915_request.c b/drivers/gpu/drm/i915/selftests/i915_request.c
index 1dab0360f76a..19f8177f817d 100644
--- a/drivers/gpu/drm/i915/selftests/i915_request.c
+++ b/drivers/gpu/drm/i915/selftests/i915_request.c
@@ -854,6 +854,8 @@ static int live_all_engines(void *arg)
 		goto out_free;
 	}
 
+	i915_vma_lock(batch);
+
 	idx = 0;
 	for_each_uabi_engine(engine, i915) {
 		request[idx] = intel_engine_create_kernel_request(engine);
@@ -871,11 +873,9 @@ static int live_all_engines(void *arg)
 		GEM_BUG_ON(err);
 		request[idx]->batch = batch;
 
-		i915_vma_lock(batch);
 		err = i915_request_await_object(request[idx], batch->obj, 0);
 		if (err == 0)
 			err = i915_vma_move_to_active(batch, request[idx], 0);
-		i915_vma_unlock(batch);
 		GEM_BUG_ON(err);
 
 		i915_request_get(request[idx]);
@@ -883,6 +883,8 @@ static int live_all_engines(void *arg)
 		idx++;
 	}
 
+	i915_vma_unlock(batch);
+
 	idx = 0;
 	for_each_uabi_engine(engine, i915) {
 		if (i915_request_completed(request[idx])) {
@@ -973,12 +975,13 @@ static int live_sequential_engines(void *arg)
 			goto out_free;
 		}
 
+		i915_vma_lock(batch);
 		request[idx] = intel_engine_create_kernel_request(engine);
 		if (IS_ERR(request[idx])) {
 			err = PTR_ERR(request[idx]);
 			pr_err("%s: Request allocation failed for %s with err=%d\n",
 			       __func__, engine->name, err);
-			goto out_request;
+			goto out_unlock;
 		}
 
 		if (prev) {
@@ -988,7 +991,7 @@ static int live_sequential_engines(void *arg)
 				i915_request_add(request[idx]);
 				pr_err("%s: Request await failed for %s with err=%d\n",
 				       __func__, engine->name, err);
-				goto out_request;
+				goto out_unlock;
 			}
 		}
 
@@ -999,12 +1002,10 @@ static int live_sequential_engines(void *arg)
 		GEM_BUG_ON(err);
 		request[idx]->batch = batch;
 
-		i915_vma_lock(batch);
 		err = i915_request_await_object(request[idx],
 						batch->obj, false);
 		if (err == 0)
 			err = i915_vma_move_to_active(batch, request[idx], 0);
-		i915_vma_unlock(batch);
 		GEM_BUG_ON(err);
 
 		i915_request_get(request[idx]);
@@ -1012,6 +1013,11 @@ static int live_sequential_engines(void *arg)
 
 		prev = request[idx];
 		idx++;
+
+out_unlock:
+		i915_vma_unlock(batch);
+		if (err)
+			goto out_request;
 	}
 
 	idx = 0;
-- 
2.25.1

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[Intel-gfx] [PATCH 21/23] drm/i915: Add ww locking to vm_fault_gtt

[Maarten Lankhorst]

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_mman.c | 51 +++++++++++++++---------
 1 file changed, 33 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/i915_gem_mman.c
index b39c24dae64e..e35e8d0b6938 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_mman.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_mman.c
@@ -283,37 +283,46 @@ static vm_fault_t vm_fault_gtt(struct vm_fault *vmf)
 	struct intel_runtime_pm *rpm = &i915->runtime_pm;
 	struct i915_ggtt *ggtt = &i915->ggtt;
 	bool write = area->vm_flags & VM_WRITE;
+	struct i915_gem_ww_ctx ww;
 	intel_wakeref_t wakeref;
 	struct i915_vma *vma;
 	pgoff_t page_offset;
 	int srcu;
 	int ret;
 
-	/* Sanity check that we allow writing into this object */
-	if (i915_gem_object_is_readonly(obj) && write)
-		return VM_FAULT_SIGBUS;
-
 	/* We don't use vmf->pgoff since that has the fake offset */
 	page_offset = (vmf->address - area->vm_start) >> PAGE_SHIFT;
 
 	trace_i915_gem_object_fault(obj, page_offset, true, write);
 
-	ret = i915_gem_object_pin_pages(obj);
+	wakeref = intel_runtime_pm_get(rpm);
+
+	i915_gem_ww_ctx_init(&ww, true);
+retry:
+	ret = i915_gem_object_lock(obj, &ww);
 	if (ret)
-		goto err;
+		goto err_rpm;
 
-	wakeref = intel_runtime_pm_get(rpm);
+	/* Sanity check that we allow writing into this object */
+	if (i915_gem_object_is_readonly(obj) && write) {
+		ret = -EFAULT;
+		goto err_rpm;
+	}
 
-	ret = intel_gt_reset_trylock(ggtt->vm.gt, &srcu);
+	ret = i915_gem_object_pin_pages(obj);
 	if (ret)
 		goto err_rpm;
 
+	ret = intel_gt_reset_trylock(ggtt->vm.gt, &srcu);
+	if (ret)
+		goto err_pages;
+
 	/* Now pin it into the GTT as needed */
-	vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0,
-				       PIN_MAPPABLE |
-				       PIN_NONBLOCK /* NOWARN */ |
-				       PIN_NOEVICT);
-	if (IS_ERR(vma)) {
+	vma = i915_gem_object_ggtt_pin_ww(obj, &ww, NULL, 0, 0,
+					  PIN_MAPPABLE |
+					  PIN_NONBLOCK /* NOWARN */ |
+					  PIN_NOEVICT);
+	if (IS_ERR(vma) && vma != ERR_PTR(-EDEADLK)) {
 		/* Use a partial view if it is bigger than available space */
 		struct i915_ggtt_view view =
 			compute_partial_view(obj, page_offset, MIN_CHUNK_PAGES);
@@ -328,11 +337,11 @@ static vm_fault_t vm_fault_gtt(struct vm_fault *vmf)
 		 * all hope that the hardware is able to track future writes.
 		 */
 
-		vma = i915_gem_object_ggtt_pin(obj, &view, 0, 0, flags);
-		if (IS_ERR(vma)) {
+		vma = i915_gem_object_ggtt_pin_ww(obj, &ww, &view, 0, 0, flags);
+		if (IS_ERR(vma) && vma != ERR_PTR(-EDEADLK)) {
 			flags = PIN_MAPPABLE;
 			view.type = I915_GGTT_VIEW_PARTIAL;
-			vma = i915_gem_object_ggtt_pin(obj, &view, 0, 0, flags);
+			vma = i915_gem_object_ggtt_pin_ww(obj, &ww, &view, 0, 0, flags);
 		}
 
 		/* The entire mappable GGTT is pinned? Unexpected! */
@@ -389,10 +398,16 @@ static vm_fault_t vm_fault_gtt(struct vm_fault *vmf)
 	__i915_vma_unpin(vma);
 err_reset:
 	intel_gt_reset_unlock(ggtt->vm.gt, srcu);
+err_pages:
+	i915_gem_object_unpin_pages(obj);
 err_rpm:
+	if (ret == -EDEADLK) {
+		ret = i915_gem_ww_ctx_backoff(&ww);
+		if (!ret)
+			goto retry;
+	}
+	i915_gem_ww_ctx_fini(&ww);
 	intel_runtime_pm_put(rpm, wakeref);
-	i915_gem_object_unpin_pages(obj);
-err:
 	return i915_error_to_vmf_fault(ret);
 }
 
-- 
2.25.1

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[Intel-gfx] [PATCH 22/23] drm/i915: Add ww locking to pin_to_display_plane

[Maarten Lankhorst]

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_domain.c | 65 ++++++++++++++++------
 drivers/gpu/drm/i915/gem/i915_gem_object.h |  1 +
 2 files changed, 49 insertions(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_domain.c b/drivers/gpu/drm/i915/gem/i915_gem_domain.c
index 1a3dd77a35b9..4be148392acc 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_domain.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_domain.c
@@ -37,6 +37,12 @@ void i915_gem_object_flush_if_display(struct drm_i915_gem_object *obj)
 	i915_gem_object_unlock(obj);
 }
 
+void i915_gem_object_flush_if_display_locked(struct drm_i915_gem_object *obj)
+{
+	if (i915_gem_object_is_framebuffer(obj))
+		__i915_gem_object_flush_for_display(obj);
+}
+
 /**
  * Moves a single object to the WC read, and possibly write domain.
  * @obj: object to act on
@@ -197,18 +203,12 @@ int i915_gem_object_set_cache_level(struct drm_i915_gem_object *obj,
 	if (ret)
 		return ret;
 
-	ret = i915_gem_object_lock_interruptible(obj, NULL);
-	if (ret)
-		return ret;
-
 	/* Always invalidate stale cachelines */
 	if (obj->cache_level != cache_level) {
 		i915_gem_object_set_cache_coherency(obj, cache_level);
 		obj->cache_dirty = true;
 	}
 
-	i915_gem_object_unlock(obj);
-
 	/* The cache-level will be applied when each vma is rebound. */
 	return i915_gem_object_unbind(obj,
 				      I915_GEM_OBJECT_UNBIND_ACTIVE |
@@ -255,6 +255,7 @@ int i915_gem_set_caching_ioctl(struct drm_device *dev, void *data,
 	struct drm_i915_gem_caching *args = data;
 	struct drm_i915_gem_object *obj;
 	enum i915_cache_level level;
+	struct i915_gem_ww_ctx ww;
 	int ret = 0;
 
 	switch (args->caching) {
@@ -293,7 +294,18 @@ int i915_gem_set_caching_ioctl(struct drm_device *dev, void *data,
 		goto out;
 	}
 
-	ret = i915_gem_object_set_cache_level(obj, level);
+	i915_gem_ww_ctx_init(&ww, true);
+retry:
+	ret = i915_gem_object_lock(obj, &ww);
+	if (!ret)
+		ret = i915_gem_object_set_cache_level(obj, level);
+
+	if (ret == -EDEADLK) {
+		ret = i915_gem_ww_ctx_backoff(&ww);
+		if (!ret)
+			goto retry;
+	}
+	i915_gem_ww_ctx_fini(&ww);
 
 out:
 	i915_gem_object_put(obj);
@@ -313,6 +325,7 @@ i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj,
 				     unsigned int flags)
 {
 	struct drm_i915_private *i915 = to_i915(obj->base.dev);
+	struct i915_gem_ww_ctx ww;
 	struct i915_vma *vma;
 	int ret;
 
@@ -320,6 +333,11 @@ i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj,
 	if (HAS_LMEM(i915) && !i915_gem_object_is_lmem(obj))
 		return ERR_PTR(-EINVAL);
 
+	i915_gem_ww_ctx_init(&ww, true);
+retry:
+	ret = i915_gem_object_lock(obj, &ww);
+	if (ret)
+		goto err;
 	/*
 	 * The display engine is not coherent with the LLC cache on gen6.  As
 	 * a result, we make sure that the pinning that is about to occur is
@@ -334,7 +352,7 @@ i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj,
 					      HAS_WT(i915) ?
 					      I915_CACHE_WT : I915_CACHE_NONE);
 	if (ret)
-		return ERR_PTR(ret);
+		goto err;
 
 	/*
 	 * As the user may map the buffer once pinned in the display plane
@@ -347,18 +365,31 @@ i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj,
 	vma = ERR_PTR(-ENOSPC);
 	if ((flags & PIN_MAPPABLE) == 0 &&
 	    (!view || view->type == I915_GGTT_VIEW_NORMAL))
-		vma = i915_gem_object_ggtt_pin(obj, view, 0, alignment,
-					       flags |
-					       PIN_MAPPABLE |
-					       PIN_NONBLOCK);
-	if (IS_ERR(vma))
-		vma = i915_gem_object_ggtt_pin(obj, view, 0, alignment, flags);
-	if (IS_ERR(vma))
-		return vma;
+		vma = i915_gem_object_ggtt_pin_ww(obj, &ww, view, 0, alignment,
+						  flags | PIN_MAPPABLE |
+						  PIN_NONBLOCK);
+	if (IS_ERR(vma) && vma != ERR_PTR(-EDEADLK))
+		vma = i915_gem_object_ggtt_pin_ww(obj, &ww, view, 0,
+						  alignment, flags);
+	if (IS_ERR(vma)) {
+		ret = PTR_ERR(vma);
+		goto err;
+	}
 
 	vma->display_alignment = max_t(u64, vma->display_alignment, alignment);
 
-	i915_gem_object_flush_if_display(obj);
+	i915_gem_object_flush_if_display_locked(obj);
+
+err:
+	if (ret == -EDEADLK) {
+		ret = i915_gem_ww_ctx_backoff(&ww);
+		if (!ret)
+			goto retry;
+	}
+	i915_gem_ww_ctx_fini(&ww);
+
+	if (ret)
+		return ERR_PTR(ret);
 
 	return vma;
 }
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.h b/drivers/gpu/drm/i915/gem/i915_gem_object.h
index 11b8e2735071..409fd00c8709 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object.h
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object.h
@@ -456,6 +456,7 @@ i915_gem_object_last_write_engine(struct drm_i915_gem_object *obj)
 void i915_gem_object_set_cache_coherency(struct drm_i915_gem_object *obj,
 					 unsigned int cache_level);
 void i915_gem_object_flush_if_display(struct drm_i915_gem_object *obj);
+void i915_gem_object_flush_if_display_locked(struct drm_i915_gem_object *obj);
 
 int __must_check
 i915_gem_object_set_to_wc_domain(struct drm_i915_gem_object *obj, bool write);
-- 
2.25.1

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[Intel-gfx] [PATCH 23/23] drm/i915: Ensure we hold the pin mutex

[Maarten Lankhorst]

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 drivers/gpu/drm/i915/gt/intel_renderstate.c | 2 +-
 drivers/gpu/drm/i915/i915_vma.c             | 9 ++++++++-
 drivers/gpu/drm/i915/i915_vma.h             | 1 +
 3 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_renderstate.c b/drivers/gpu/drm/i915/gt/intel_renderstate.c
index b954d0807b4b..357207bf5d7c 100644
--- a/drivers/gpu/drm/i915/gt/intel_renderstate.c
+++ b/drivers/gpu/drm/i915/gt/intel_renderstate.c
@@ -207,7 +207,7 @@ int intel_renderstate_init(struct intel_renderstate *so,
 	if (err)
 		goto err_context;
 
-	err = i915_vma_pin(so->vma, 0, 0, PIN_GLOBAL | PIN_HIGH);
+	err = i915_vma_pin_ww(so->vma, &so->ww, 0, 0, PIN_GLOBAL | PIN_HIGH);
 	if (err)
 		goto err_context;
 
diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c
index e9d30ab5da6b..82fc882a6af3 100644
--- a/drivers/gpu/drm/i915/i915_vma.c
+++ b/drivers/gpu/drm/i915/i915_vma.c
@@ -868,6 +868,8 @@ int i915_vma_pin_ww(struct i915_vma *vma, struct i915_gem_ww_ctx *ww,
 #ifdef CONFIG_PROVE_LOCKING
 	if (debug_locks && lockdep_is_held(&vma->vm->i915->drm.struct_mutex))
 		WARN_ON(!ww);
+	if (debug_locks && ww && vma->resv)
+		assert_vma_held(vma);
 #endif
 
 	BUILD_BUG_ON(PIN_GLOBAL != I915_VMA_GLOBAL_BIND);
@@ -1008,8 +1010,13 @@ int i915_ggtt_pin(struct i915_vma *vma, struct i915_gem_ww_ctx *ww,
 
 	GEM_BUG_ON(!i915_vma_is_ggtt(vma));
 
+	WARN_ON(!ww && vma->resv && dma_resv_held(vma->resv));
+
 	do {
-		err = i915_vma_pin_ww(vma, ww, 0, align, flags | PIN_GLOBAL);
+		if (ww)
+			err = i915_vma_pin_ww(vma, ww, 0, align, flags | PIN_GLOBAL);
+		else
+			err = i915_vma_pin(vma, 0, align, flags | PIN_GLOBAL);
 		if (err != -ENOSPC) {
 			if (!err) {
 				err = i915_vma_wait_for_bind(vma);
diff --git a/drivers/gpu/drm/i915/i915_vma.h b/drivers/gpu/drm/i915/i915_vma.h
index 2e3779a8a437..d937ce950481 100644
--- a/drivers/gpu/drm/i915/i915_vma.h
+++ b/drivers/gpu/drm/i915/i915_vma.h
@@ -242,6 +242,7 @@ i915_vma_pin_ww(struct i915_vma *vma, struct i915_gem_ww_ctx *ww,
 static inline int __must_check
 i915_vma_pin(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
 {
+	WARN_ON_ONCE(vma->resv && dma_resv_held(vma->resv));
 	return i915_vma_pin_ww(vma, NULL, size, alignment, flags);
 }
 
-- 
2.25.1

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[Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for series starting with [01/23] perf/core: Only copy-to-user after completely unlocking all locks, v3.

[Patchwork]

== Series Details ==

Series: series starting with [01/23] perf/core: Only copy-to-user after completely unlocking all locks, v3.
URL   : https://patchwork.freedesktop.org/series/75668/
State : warning

== Summary ==

$ dim checkpatch origin/drm-tip
bfdbf3931f48 perf/core: Only copy-to-user after completely unlocking all locks, v3.
-:17: WARNING:COMMIT_LOG_LONG_LINE: Possible unwrapped commit description (prefer a maximum 75 chars per line)
#17: 
<4> [604.892540] ffffffff8264a558 (rcu_state.barrier_mutex){+.+.}, at: rcu_barrier+0x23/0x190

-:106: WARNING:BAD_SIGN_OFF: Duplicate signature
#106: 
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>

-:180: CHECK:PARENTHESIS_ALIGNMENT: Alignment should match open parenthesis
#180: FILE: kernel/events/core.c:4998:
+__perf_read(struct perf_event *event, char __user *buf,
+		    size_t count, u64 *values)

total: 0 errors, 2 warnings, 1 checks, 106 lines checked
ae1f1cda17bc Revert "drm/i915/gem: Drop relocation slowpath"
-:78: WARNING:LINE_SPACING: Missing a blank line after declarations
#78: FILE: drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c:1628:
+		int err = __get_user(c, addr);
+		if (err)

total: 0 errors, 1 warnings, 0 checks, 257 lines checked
0650546c9515 drm/i915: Add an implementation for i915_gem_ww_ctx locking, v2.
-:506: WARNING:LONG_LINE: line over 100 characters
#506: FILE: drivers/gpu/drm/i915/i915_gem.c:1341:
+	while ((obj = list_first_entry_or_null(&ww->obj_list, struct drm_i915_gem_object, obj_link))) {

total: 0 errors, 1 warnings, 0 checks, 481 lines checked
91b84c36aeac drm/i915: Remove locking from i915_gem_object_prepare_read/write
db3ef6207fc6 drm/i915: Parse command buffer earlier in eb_relocate(slow)
9b2e3aa9640b Revert "drm/i915/gem: Split eb_vma into its own allocation"
d3c15b6fa06a drm/i915: Use per object locking in execbuf, v7.
d7aeab78a2e2 drm/i915: Use ww locking in intel_renderstate.
-:10: WARNING:COMMIT_LOG_LONG_LINE: Possible unwrapped commit description (prefer a maximum 75 chars per line)
#10: 
Convert to using ww-waiting, and make sure we always pin intel_context_state,

total: 0 errors, 1 warnings, 0 checks, 209 lines checked
cfb0d26c1f8e drm/i915: Add ww context handling to context_barrier_task
-:19: WARNING:LONG_LINE: line over 100 characters
#19: FILE: drivers/gpu/drm/i915/gem/i915_gem_context.c:1099:
+				int (*pin)(struct intel_context *ce, struct i915_gem_ww_ctx *ww, void *data),

total: 0 errors, 1 warnings, 0 checks, 146 lines checked
7749cc342e6f drm/i915: Nuke arguments to eb_pin_engine
e6d6e2ddae25 drm/i915: Pin engine before pinning all objects, v3.
d8aa2d4a5f34 drm/i915: Rework intel_context pinning to do everything outside of pin_mutex
-:125: CHECK:LINE_SPACING: Please don't use multiple blank lines
#125: FILE: drivers/gpu/drm/i915/gt/intel_context.c:176:
+
+

-:338: CHECK:PARENTHESIS_ALIGNMENT: Alignment should match open parenthesis
#338: FILE: drivers/gpu/drm/i915/gt/intel_lrc.c:3180:
+	*vaddr = i915_gem_object_pin_map(ce->state->obj,
+					i915_coherent_map_type(ce->engine->i915) |

total: 0 errors, 0 warnings, 2 checks, 435 lines checked
ffb87f30e8e4 drm/i915: Make sure execbuffer always passes ww state to i915_vma_pin.
-:95: CHECK:PARENTHESIS_ALIGNMENT: Alignment should match open parenthesis
#95: FILE: drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c:593:
+	err = i915_vma_pin_ww(vma, &eb->ww,
 			   entry->pad_to_size, entry->alignment,

-:203: WARNING:BLOCK_COMMENT_STYLE: Block comments use a trailing */ on a separate line
#203: FILE: drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c:2223:
+	 * hsw should have this fixed, but bdw mucks it up again. */

total: 0 errors, 1 warnings, 1 checks, 827 lines checked
19816681a8b9 drm/i915: Convert i915_gem_object/client_blt.c to use ww locking as well, v2.
e3058c9e38cd drm/i915: Kill last user of intel_context_create_request outside of selftests
8fa1ddf4790a drm/i915: Convert i915_perf to ww locking as well
76f08941fb96 drm/i915: Dirty hack to fix selftests locking inversion
bfc4aab3b1a2 drm/i915/selftests: Fix locking inversion in lrc selftest.
09011eb630f6 drm/i915: Use ww pinning for intel_context_create_request()
fcf3a2fda97b drm/i915: Move i915_vma_lock in the selftests to avoid lock inversion, v2.
b8b699f678f6 drm/i915: Add ww locking to vm_fault_gtt
-:7: WARNING:COMMIT_MESSAGE: Missing commit description - Add an appropriate one

total: 0 errors, 1 warnings, 0 checks, 91 lines checked
ef4b37bc4757 drm/i915: Add ww locking to pin_to_display_plane
-:7: WARNING:COMMIT_MESSAGE: Missing commit description - Add an appropriate one

total: 0 errors, 1 warnings, 0 checks, 129 lines checked
68e985f3b25a drm/i915: Ensure we hold the pin mutex
-:7: WARNING:COMMIT_MESSAGE: Missing commit description - Add an appropriate one

total: 0 errors, 1 warnings, 0 checks, 37 lines checked

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[Intel-gfx] ✗ Fi.CI.BAT: failure for series starting with [01/23] perf/core: Only copy-to-user after completely unlocking all locks, v3.

[Patchwork]

== Series Details ==

Series: series starting with [01/23] perf/core: Only copy-to-user after completely unlocking all locks, v3.
URL   : https://patchwork.freedesktop.org/series/75668/
State : failure

== Summary ==

CI Bug Log - changes from CI_DRM_8275 -> Patchwork_17253
====================================================

Summary
-------

  **FAILURE**

  Serious unknown changes coming with Patchwork_17253 absolutely need to be
  verified manually.
  
  If you think the reported changes have nothing to do with the changes
  introduced in Patchwork_17253, please notify your bug team to allow them
  to document this new failure mode, which will reduce false positives in CI.

  External URL: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/index.html

Possible new issues
-------------------

  Here are the unknown changes that may have been introduced in Patchwork_17253:

### IGT changes ###

#### Possible regressions ####

  * igt@gem_close_race@basic-process:
    - fi-ivb-3770:        [PASS][1] -> [INCOMPLETE][2]
   [1]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/fi-ivb-3770/igt@gem_close_race@basic-process.html
   [2]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/fi-ivb-3770/igt@gem_close_race@basic-process.html
    - fi-hsw-4770:        [PASS][3] -> [INCOMPLETE][4]
   [3]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/fi-hsw-4770/igt@gem_close_race@basic-process.html
   [4]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/fi-hsw-4770/igt@gem_close_race@basic-process.html
    - fi-hsw-peppy:       [PASS][5] -> [INCOMPLETE][6]
   [5]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/fi-hsw-peppy/igt@gem_close_race@basic-process.html
   [6]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/fi-hsw-peppy/igt@gem_close_race@basic-process.html

  * igt@gem_exec_fence@basic-await@rcs0:
    - fi-blb-e6850:       [PASS][7] -> [DMESG-WARN][8]
   [7]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/fi-blb-e6850/igt@gem_exec_fence@basic-await@rcs0.html
   [8]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/fi-blb-e6850/igt@gem_exec_fence@basic-await@rcs0.html
    - fi-elk-e7500:       [PASS][9] -> [DMESG-WARN][10]
   [9]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/fi-elk-e7500/igt@gem_exec_fence@basic-await@rcs0.html
   [10]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/fi-elk-e7500/igt@gem_exec_fence@basic-await@rcs0.html
    - fi-pnv-d510:        [PASS][11] -> [DMESG-WARN][12]
   [11]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/fi-pnv-d510/igt@gem_exec_fence@basic-await@rcs0.html
   [12]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/fi-pnv-d510/igt@gem_exec_fence@basic-await@rcs0.html
    - fi-ilk-650:         [PASS][13] -> [DMESG-WARN][14]
   [13]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/fi-ilk-650/igt@gem_exec_fence@basic-await@rcs0.html
   [14]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/fi-ilk-650/igt@gem_exec_fence@basic-await@rcs0.html

  * igt@gem_exec_fence@basic-await@vcs0:
    - fi-ilk-650:         [PASS][15] -> [INCOMPLETE][16]
   [15]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/fi-ilk-650/igt@gem_exec_fence@basic-await@vcs0.html
   [16]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/fi-ilk-650/igt@gem_exec_fence@basic-await@vcs0.html

  * igt@gem_render_tiled_blits@basic:
    - fi-gdg-551:         [PASS][17] -> [DMESG-WARN][18]
   [17]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/fi-gdg-551/igt@gem_render_tiled_blits@basic.html
   [18]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/fi-gdg-551/igt@gem_render_tiled_blits@basic.html

  * igt@gem_sync@basic-each:
    - fi-cfl-8109u:       [PASS][19] -> [INCOMPLETE][20]
   [19]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/fi-cfl-8109u/igt@gem_sync@basic-each.html
   [20]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/fi-cfl-8109u/igt@gem_sync@basic-each.html

  * igt@i915_selftest@live@gem_contexts:
    - fi-skl-6770hq:      [PASS][21] -> [DMESG-WARN][22]
   [21]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/fi-skl-6770hq/igt@i915_selftest@live@gem_contexts.html
   [22]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/fi-skl-6770hq/igt@i915_selftest@live@gem_contexts.html
    - fi-skl-lmem:        [PASS][23] -> [DMESG-WARN][24]
   [23]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/fi-skl-lmem/igt@i915_selftest@live@gem_contexts.html
   [24]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/fi-skl-lmem/igt@i915_selftest@live@gem_contexts.html

  * igt@kms_busy@basic@flip:
    - fi-bwr-2160:        [PASS][25] -> [FAIL][26]
   [25]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/fi-bwr-2160/igt@kms_busy@basic@flip.html
   [26]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/fi-bwr-2160/igt@kms_busy@basic@flip.html

  * igt@runner@aborted:
    - fi-ilk-650:         NOTRUN -> [FAIL][27]
   [27]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/fi-ilk-650/igt@runner@aborted.html
    - fi-pnv-d510:        NOTRUN -> [FAIL][28]
   [28]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/fi-pnv-d510/igt@runner@aborted.html
    - fi-elk-e7500:       NOTRUN -> [FAIL][29]
   [29]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/fi-elk-e7500/igt@runner@aborted.html
    - fi-blb-e6850:       NOTRUN -> [FAIL][30]
   [30]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/fi-blb-e6850/igt@runner@aborted.html

  
Known issues
------------

  Here are the changes found in Patchwork_17253 that come from known issues:

### IGT changes ###

#### Issues hit ####

  * igt@gem_close_race@basic-process:
    - fi-byt-j1900:       [PASS][31] -> [INCOMPLETE][32] ([i915#45])
   [31]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/fi-byt-j1900/igt@gem_close_race@basic-process.html
   [32]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/fi-byt-j1900/igt@gem_close_race@basic-process.html
    - fi-byt-n2820:       [PASS][33] -> [INCOMPLETE][34] ([i915#45])
   [33]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/fi-byt-n2820/igt@gem_close_race@basic-process.html
   [34]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/fi-byt-n2820/igt@gem_close_race@basic-process.html

  * igt@gem_exec_fence@basic-await@vcs0:
    - fi-elk-e7500:       [PASS][35] -> [INCOMPLETE][36] ([i915#66])
   [35]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/fi-elk-e7500/igt@gem_exec_fence@basic-await@vcs0.html
   [36]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/fi-elk-e7500/igt@gem_exec_fence@basic-await@vcs0.html

  * igt@i915_pm_rpm@module-reload:
    - fi-skl-6770hq:      [PASS][37] -> [FAIL][38] ([i915#178])
   [37]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/fi-skl-6770hq/igt@i915_pm_rpm@module-reload.html
   [38]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/fi-skl-6770hq/igt@i915_pm_rpm@module-reload.html

  
#### Possible fixes ####

  * {igt@gem_wait@busy@all}:
    - fi-bwr-2160:        [FAIL][39] ([i915#1604]) -> [PASS][40]
   [39]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/fi-bwr-2160/igt@gem_wait@busy@all.html
   [40]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/fi-bwr-2160/igt@gem_wait@busy@all.html

  * igt@i915_pm_rpm@basic-pci-d3-state:
    - fi-icl-dsi:         [INCOMPLETE][41] ([i915#189]) -> [PASS][42]
   [41]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/fi-icl-dsi/igt@i915_pm_rpm@basic-pci-d3-state.html
   [42]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/fi-icl-dsi/igt@i915_pm_rpm@basic-pci-d3-state.html

  
#### Warnings ####

  * igt@i915_pm_rpm@module-reload:
    - fi-kbl-x1275:       [FAIL][43] ([i915#62]) -> [SKIP][44] ([fdo#109271])
   [43]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/fi-kbl-x1275/igt@i915_pm_rpm@module-reload.html
   [44]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/fi-kbl-x1275/igt@i915_pm_rpm@module-reload.html

  
  {name}: This element is suppressed. This means it is ignored when computing
          the status of the difference (SUCCESS, WARNING, or FAILURE).

  [fdo#109271]: https://bugs.freedesktop.org/show_bug.cgi?id=109271
  [i915#1604]: https://gitlab.freedesktop.org/drm/intel/issues/1604
  [i915#178]: https://gitlab.freedesktop.org/drm/intel/issues/178
  [i915#189]: https://gitlab.freedesktop.org/drm/intel/issues/189
  [i915#45]: https://gitlab.freedesktop.org/drm/intel/issues/45
  [i915#62]: https://gitlab.freedesktop.org/drm/intel/issues/62
  [i915#66]: https://gitlab.freedesktop.org/drm/intel/issues/66
  [i915#794]: https://gitlab.freedesktop.org/drm/intel/issues/794


Participating hosts (52 -> 46)
------------------------------

  Missing    (6): fi-ilk-m540 fi-hsw-4200u fi-byt-squawks fi-bsw-cyan fi-byt-clapper fi-bdw-samus 


Build changes
-------------

  * CI: CI-20190529 -> None
  * Linux: CI_DRM_8275 -> Patchwork_17253

  CI-20190529: 20190529
  CI_DRM_8275: f2a4da2bcd576d1b56aeb53600e8a0b710117a20 @ git://anongit.freedesktop.org/gfx-ci/linux
  IGT_5581: ab0620e555119ec55f12ba9ab9e6e9246d407648 @ git://anongit.freedesktop.org/xorg/app/intel-gpu-tools
  Patchwork_17253: 68e985f3b25a85cda132487d89625696488d1ed7 @ git://anongit.freedesktop.org/gfx-ci/linux


== Linux commits ==

68e985f3b25a drm/i915: Ensure we hold the pin mutex
ef4b37bc4757 drm/i915: Add ww locking to pin_to_display_plane
b8b699f678f6 drm/i915: Add ww locking to vm_fault_gtt
fcf3a2fda97b drm/i915: Move i915_vma_lock in the selftests to avoid lock inversion, v2.
09011eb630f6 drm/i915: Use ww pinning for intel_context_create_request()
bfc4aab3b1a2 drm/i915/selftests: Fix locking inversion in lrc selftest.
76f08941fb96 drm/i915: Dirty hack to fix selftests locking inversion
8fa1ddf4790a drm/i915: Convert i915_perf to ww locking as well
e3058c9e38cd drm/i915: Kill last user of intel_context_create_request outside of selftests
19816681a8b9 drm/i915: Convert i915_gem_object/client_blt.c to use ww locking as well, v2.
ffb87f30e8e4 drm/i915: Make sure execbuffer always passes ww state to i915_vma_pin.
d8aa2d4a5f34 drm/i915: Rework intel_context pinning to do everything outside of pin_mutex
e6d6e2ddae25 drm/i915: Pin engine before pinning all objects, v3.
7749cc342e6f drm/i915: Nuke arguments to eb_pin_engine
cfb0d26c1f8e drm/i915: Add ww context handling to context_barrier_task
d7aeab78a2e2 drm/i915: Use ww locking in intel_renderstate.
d3c15b6fa06a drm/i915: Use per object locking in execbuf, v7.
9b2e3aa9640b Revert "drm/i915/gem: Split eb_vma into its own allocation"
db3ef6207fc6 drm/i915: Parse command buffer earlier in eb_relocate(slow)
91b84c36aeac drm/i915: Remove locking from i915_gem_object_prepare_read/write
0650546c9515 drm/i915: Add an implementation for i915_gem_ww_ctx locking, v2.
ae1f1cda17bc Revert "drm/i915/gem: Drop relocation slowpath"
bfdbf3931f48 perf/core: Only copy-to-user after completely unlocking all locks, v3.

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/index.html
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

[Intel-gfx] ✗ Fi.CI.IGT: failure for series starting with [01/23] perf/core: Only copy-to-user after completely unlocking all locks, v3.

[Patchwork]

== Series Details ==

Series: series starting with [01/23] perf/core: Only copy-to-user after completely unlocking all locks, v3.
URL   : https://patchwork.freedesktop.org/series/75668/
State : failure

== Summary ==

CI Bug Log - changes from CI_DRM_8275_full -> Patchwork_17253_full
====================================================

Summary
-------

  **FAILURE**

  Serious unknown changes coming with Patchwork_17253_full absolutely need to be
  verified manually.
  
  If you think the reported changes have nothing to do with the changes
  introduced in Patchwork_17253_full, please notify your bug team to allow them
  to document this new failure mode, which will reduce false positives in CI.

  

Possible new issues
-------------------

  Here are the unknown changes that may have been introduced in Patchwork_17253_full:

### IGT changes ###

#### Possible regressions ####

  * igt@gem_close@many-handles-one-vma:
    - shard-tglb:         [PASS][1] -> [FAIL][2]
   [1]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-tglb6/igt@gem_close@many-handles-one-vma.html
   [2]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-tglb5/igt@gem_close@many-handles-one-vma.html
    - shard-snb:          [PASS][3] -> [FAIL][4]
   [3]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-snb5/igt@gem_close@many-handles-one-vma.html
   [4]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-snb2/igt@gem_close@many-handles-one-vma.html
    - shard-iclb:         [PASS][5] -> [FAIL][6]
   [5]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-iclb3/igt@gem_close@many-handles-one-vma.html
   [6]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-iclb1/igt@gem_close@many-handles-one-vma.html

  * igt@gem_ctx_persistence@smoketest:
    - shard-skl:          [PASS][7] -> [INCOMPLETE][8] +12 similar issues
   [7]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-skl5/igt@gem_ctx_persistence@smoketest.html
   [8]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-skl8/igt@gem_ctx_persistence@smoketest.html

  * igt@kms_big_fb@linear-8bpp-rotate-180:
    - shard-apl:          [PASS][9] -> [INCOMPLETE][10] +15 similar issues
   [9]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-apl3/igt@kms_big_fb@linear-8bpp-rotate-180.html
   [10]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-apl8/igt@kms_big_fb@linear-8bpp-rotate-180.html

  * igt@kms_big_fb@y-tiled-16bpp-rotate-270:
    - shard-iclb:         [PASS][11] -> [INCOMPLETE][12] +11 similar issues
   [11]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-iclb4/igt@kms_big_fb@y-tiled-16bpp-rotate-270.html
   [12]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-iclb6/igt@kms_big_fb@y-tiled-16bpp-rotate-270.html

  * igt@kms_big_fb@y-tiled-64bpp-rotate-180:
    - shard-tglb:         [PASS][13] -> [INCOMPLETE][14] +13 similar issues
   [13]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-tglb3/igt@kms_big_fb@y-tiled-64bpp-rotate-180.html
   [14]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-tglb5/igt@kms_big_fb@y-tiled-64bpp-rotate-180.html

  * igt@kms_big_fb@y-tiled-8bpp-rotate-0:
    - shard-kbl:          [PASS][15] -> [INCOMPLETE][16] +14 similar issues
   [15]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-kbl2/igt@kms_big_fb@y-tiled-8bpp-rotate-0.html
   [16]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-kbl1/igt@kms_big_fb@y-tiled-8bpp-rotate-0.html

  * igt@runner@aborted:
    - shard-iclb:         NOTRUN -> ([FAIL][17], [FAIL][18])
   [17]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-iclb7/igt@runner@aborted.html
   [18]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-iclb7/igt@runner@aborted.html
    - shard-tglb:         NOTRUN -> ([FAIL][19], [FAIL][20]) ([i915#1389])
   [19]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-tglb7/igt@runner@aborted.html
   [20]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-tglb8/igt@runner@aborted.html

  
#### Warnings ####

  * igt@runner@aborted:
    - shard-kbl:          [FAIL][21] ([i915#1423] / [i915#92]) -> ([FAIL][22], [FAIL][23], [FAIL][24], [FAIL][25], [FAIL][26]) ([i915#1389] / [i915#1402] / [i915#1423] / [i915#92])
   [21]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-kbl6/igt@runner@aborted.html
   [22]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-kbl1/igt@runner@aborted.html
   [23]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-kbl2/igt@runner@aborted.html
   [24]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-kbl4/igt@runner@aborted.html
   [25]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-kbl7/igt@runner@aborted.html
   [26]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-kbl4/igt@runner@aborted.html

  
#### Suppressed ####

  The following results come from untrusted machines, tests, or statuses.
  They do not affect the overall result.

  * {igt@gem_exec_parallel@engines@basic}:
    - shard-apl:          [PASS][27] -> [INCOMPLETE][28] +1 similar issue
   [27]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-apl3/igt@gem_exec_parallel@engines@basic.html
   [28]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-apl2/igt@gem_exec_parallel@engines@basic.html
    - shard-skl:          [PASS][29] -> [INCOMPLETE][30] +1 similar issue
   [29]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-skl8/igt@gem_exec_parallel@engines@basic.html
   [30]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-skl6/igt@gem_exec_parallel@engines@basic.html

  * {igt@gem_exec_reloc@basic-parallel}:
    - shard-kbl:          [PASS][31] -> [INCOMPLETE][32]
   [31]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-kbl3/igt@gem_exec_reloc@basic-parallel.html
   [32]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-kbl3/igt@gem_exec_reloc@basic-parallel.html
    - shard-tglb:         [PASS][33] -> [INCOMPLETE][34]
   [33]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-tglb7/igt@gem_exec_reloc@basic-parallel.html
   [34]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-tglb6/igt@gem_exec_reloc@basic-parallel.html
    - shard-iclb:         [PASS][35] -> [INCOMPLETE][36]
   [35]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-iclb7/igt@gem_exec_reloc@basic-parallel.html
   [36]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-iclb8/igt@gem_exec_reloc@basic-parallel.html

  
New tests
---------

  New tests have been introduced between CI_DRM_8275_full and Patchwork_17253_full:

### New IGT tests (1) ###

  * igt@gem_exec_store@pages:
    - Statuses :
    - Exec time: [None] s

  

Known issues
------------

  Here are the changes found in Patchwork_17253_full that come from known issues:

### IGT changes ###

#### Issues hit ####

  * igt@gem_ctx_persistence@close-replace-race:
    - shard-tglb:         [PASS][37] -> [INCOMPLETE][38] ([i915#1402])
   [37]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-tglb3/igt@gem_ctx_persistence@close-replace-race.html
   [38]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-tglb8/igt@gem_ctx_persistence@close-replace-race.html
    - shard-kbl:          [PASS][39] -> [INCOMPLETE][40] ([i915#1402])
   [39]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-kbl6/igt@gem_ctx_persistence@close-replace-race.html
   [40]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-kbl2/igt@gem_ctx_persistence@close-replace-race.html
    - shard-iclb:         [PASS][41] -> [INCOMPLETE][42] ([i915#1402])
   [41]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-iclb5/igt@gem_ctx_persistence@close-replace-race.html
   [42]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-iclb7/igt@gem_ctx_persistence@close-replace-race.html
    - shard-apl:          [PASS][43] -> [INCOMPLETE][44] ([i915#1402])
   [43]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-apl4/igt@gem_ctx_persistence@close-replace-race.html
   [44]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-apl3/igt@gem_ctx_persistence@close-replace-race.html
    - shard-skl:          [PASS][45] -> [INCOMPLETE][46] ([i915#1402])
   [45]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-skl1/igt@gem_ctx_persistence@close-replace-race.html
   [46]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-skl10/igt@gem_ctx_persistence@close-replace-race.html
    - shard-glk:          [PASS][47] -> [INCOMPLETE][48] ([i915#1402] / [i915#58] / [k.org#198133])
   [47]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-glk2/igt@gem_ctx_persistence@close-replace-race.html
   [48]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-glk6/igt@gem_ctx_persistence@close-replace-race.html

  * igt@gem_exec_params@invalid-bsd-ring:
    - shard-iclb:         [PASS][49] -> [SKIP][50] ([fdo#109276])
   [49]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-iclb4/igt@gem_exec_params@invalid-bsd-ring.html
   [50]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-iclb7/igt@gem_exec_params@invalid-bsd-ring.html

  * igt@gem_exec_whisper@basic-contexts-priority:
    - shard-kbl:          [PASS][51] -> [INCOMPLETE][52] ([i915#1318]) +1 similar issue
   [51]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-kbl7/igt@gem_exec_whisper@basic-contexts-priority.html
   [52]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-kbl4/igt@gem_exec_whisper@basic-contexts-priority.html

  * igt@gem_exec_whisper@basic-fds-all:
    - shard-kbl:          [PASS][53] -> [INCOMPLETE][54] ([i915#794])
   [53]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-kbl3/igt@gem_exec_whisper@basic-fds-all.html
   [54]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-kbl4/igt@gem_exec_whisper@basic-fds-all.html

  * igt@gem_exec_whisper@basic-fds-forked-all:
    - shard-skl:          [PASS][55] -> [INCOMPLETE][56] ([i915#1318])
   [55]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-skl10/igt@gem_exec_whisper@basic-fds-forked-all.html
   [56]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-skl8/igt@gem_exec_whisper@basic-fds-forked-all.html

  * igt@gem_softpin@noreloc-s3:
    - shard-kbl:          [PASS][57] -> [DMESG-WARN][58] ([i915#180])
   [57]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-kbl7/igt@gem_softpin@noreloc-s3.html
   [58]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-kbl6/igt@gem_softpin@noreloc-s3.html

  * igt@kms_big_fb@x-tiled-16bpp-rotate-180:
    - shard-skl:          [PASS][59] -> [INCOMPLETE][60] ([i915#655])
   [59]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-skl2/igt@kms_big_fb@x-tiled-16bpp-rotate-180.html
   [60]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-skl7/igt@kms_big_fb@x-tiled-16bpp-rotate-180.html

  * igt@kms_big_fb@yf-tiled-32bpp-rotate-180:
    - shard-glk:          [PASS][61] -> [INCOMPLETE][62] ([i915#58] / [k.org#198133]) +21 similar issues
   [61]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-glk5/igt@kms_big_fb@yf-tiled-32bpp-rotate-180.html
   [62]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-glk3/igt@kms_big_fb@yf-tiled-32bpp-rotate-180.html

  * igt@kms_cursor_crc@pipe-a-cursor-128x42-onscreen:
    - shard-apl:          [PASS][63] -> [FAIL][64] ([i915#54] / [i915#95])
   [63]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-apl7/igt@kms_cursor_crc@pipe-a-cursor-128x42-onscreen.html
   [64]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-apl8/igt@kms_cursor_crc@pipe-a-cursor-128x42-onscreen.html

  * igt@kms_cursor_crc@pipe-a-cursor-suspend:
    - shard-apl:          [PASS][65] -> [DMESG-WARN][66] ([i915#180]) +1 similar issue
   [65]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-apl6/igt@kms_cursor_crc@pipe-a-cursor-suspend.html
   [66]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-apl6/igt@kms_cursor_crc@pipe-a-cursor-suspend.html

  * igt@kms_flip@flip-vs-expired-vblank:
    - shard-skl:          [PASS][67] -> [FAIL][68] ([i915#79])
   [67]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-skl4/igt@kms_flip@flip-vs-expired-vblank.html
   [68]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-skl9/igt@kms_flip@flip-vs-expired-vblank.html

  * igt@kms_frontbuffer_tracking@psr-1p-offscren-pri-shrfb-draw-pwrite:
    - shard-skl:          [PASS][69] -> [FAIL][70] ([i915#49])
   [69]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-skl6/igt@kms_frontbuffer_tracking@psr-1p-offscren-pri-shrfb-draw-pwrite.html
   [70]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-skl5/igt@kms_frontbuffer_tracking@psr-1p-offscren-pri-shrfb-draw-pwrite.html

  * igt@kms_hdr@bpc-switch:
    - shard-skl:          [PASS][71] -> [FAIL][72] ([i915#1188])
   [71]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-skl1/igt@kms_hdr@bpc-switch.html
   [72]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-skl9/igt@kms_hdr@bpc-switch.html

  * igt@kms_plane_alpha_blend@pipe-a-coverage-7efc:
    - shard-skl:          [PASS][73] -> [FAIL][74] ([fdo#108145] / [i915#265])
   [73]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-skl6/igt@kms_plane_alpha_blend@pipe-a-coverage-7efc.html
   [74]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-skl5/igt@kms_plane_alpha_blend@pipe-a-coverage-7efc.html

  * igt@kms_psr2_su@frontbuffer:
    - shard-iclb:         [PASS][75] -> [SKIP][76] ([fdo#109642] / [fdo#111068])
   [75]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-iclb2/igt@kms_psr2_su@frontbuffer.html
   [76]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-iclb8/igt@kms_psr2_su@frontbuffer.html

  * igt@kms_psr@psr2_cursor_render:
    - shard-iclb:         [PASS][77] -> [SKIP][78] ([fdo#109441]) +1 similar issue
   [77]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-iclb2/igt@kms_psr@psr2_cursor_render.html
   [78]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-iclb1/igt@kms_psr@psr2_cursor_render.html

  
#### Possible fixes ####

  * igt@kms_draw_crc@draw-method-rgb565-mmap-gtt-ytiled:
    - shard-glk:          [FAIL][79] ([i915#52] / [i915#54]) -> [PASS][80]
   [79]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-glk9/igt@kms_draw_crc@draw-method-rgb565-mmap-gtt-ytiled.html
   [80]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-glk3/igt@kms_draw_crc@draw-method-rgb565-mmap-gtt-ytiled.html

  * igt@kms_plane@plane-panning-bottom-right-suspend-pipe-b-planes:
    - shard-apl:          [DMESG-WARN][81] ([i915#180]) -> [PASS][82]
   [81]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-apl1/igt@kms_plane@plane-panning-bottom-right-suspend-pipe-b-planes.html
   [82]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-apl4/igt@kms_plane@plane-panning-bottom-right-suspend-pipe-b-planes.html

  * igt@kms_plane@plane-panning-bottom-right-suspend-pipe-c-planes:
    - shard-kbl:          [DMESG-WARN][83] ([i915#180]) -> [PASS][84]
   [83]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-kbl3/igt@kms_plane@plane-panning-bottom-right-suspend-pipe-c-planes.html
   [84]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-kbl4/igt@kms_plane@plane-panning-bottom-right-suspend-pipe-c-planes.html

  * igt@kms_plane_alpha_blend@pipe-c-coverage-7efc:
    - shard-skl:          [FAIL][85] ([fdo#108145] / [i915#265]) -> [PASS][86]
   [85]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-skl3/igt@kms_plane_alpha_blend@pipe-c-coverage-7efc.html
   [86]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-skl7/igt@kms_plane_alpha_blend@pipe-c-coverage-7efc.html

  
#### Warnings ####

  * igt@i915_pm_dc@dc3co-vpb-simulation:
    - shard-iclb:         [SKIP][87] ([i915#588]) -> [SKIP][88] ([i915#658])
   [87]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-iclb2/igt@i915_pm_dc@dc3co-vpb-simulation.html
   [88]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-iclb4/igt@i915_pm_dc@dc3co-vpb-simulation.html

  * igt@i915_pm_rpm@modeset-lpsp-stress:
    - shard-snb:          [SKIP][89] ([fdo#109271]) -> [INCOMPLETE][90] ([i915#82])
   [89]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-snb6/igt@i915_pm_rpm@modeset-lpsp-stress.html
   [90]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-snb5/igt@i915_pm_rpm@modeset-lpsp-stress.html

  * igt@runner@aborted:
    - shard-apl:          [FAIL][91] ([i915#1423]) -> ([FAIL][92], [FAIL][93], [FAIL][94], [FAIL][95]) ([fdo#109271] / [i915#1402] / [i915#1423] / [i915#1610])
   [91]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_8275/shard-apl8/igt@runner@aborted.html
   [92]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-apl3/igt@runner@aborted.html
   [93]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-apl8/igt@runner@aborted.html
   [94]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-apl1/igt@runner@aborted.html
   [95]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/shard-apl8/igt@runner@aborted.html

  
  {name}: This element is suppressed. This means it is ignored when computing
          the status of the difference (SUCCESS, WARNING, or FAILURE).

  [fdo#108145]: https://bugs.freedesktop.org/show_bug.cgi?id=108145
  [fdo#109271]: https://bugs.freedesktop.org/show_bug.cgi?id=109271
  [fdo#109276]: https://bugs.freedesktop.org/show_bug.cgi?id=109276
  [fdo#109441]: https://bugs.freedesktop.org/show_bug.cgi?id=109441
  [fdo#109642]: https://bugs.freedesktop.org/show_bug.cgi?id=109642
  [fdo#111068]: https://bugs.freedesktop.org/show_bug.cgi?id=111068
  [i915#1188]: https://gitlab.freedesktop.org/drm/intel/issues/1188
  [i915#1318]: https://gitlab.freedesktop.org/drm/intel/issues/1318
  [i915#1389]: https://gitlab.freedesktop.org/drm/intel/issues/1389
  [i915#1402]: https://gitlab.freedesktop.org/drm/intel/issues/1402
  [i915#1423]: https://gitlab.freedesktop.org/drm/intel/issues/1423
  [i915#1542]: https://gitlab.freedesktop.org/drm/intel/issues/1542
  [i915#1610]: https://gitlab.freedesktop.org/drm/intel/issues/1610
  [i915#180]: https://gitlab.freedesktop.org/drm/intel/issues/180
  [i915#198]: https://gitlab.freedesktop.org/drm/intel/issues/198
  [i915#265]: https://gitlab.freedesktop.org/drm/intel/issues/265
  [i915#49]: https://gitlab.freedesktop.org/drm/intel/issues/49
  [i915#52]: https://gitlab.freedesktop.org/drm/intel/issues/52
  [i915#54]: https://gitlab.freedesktop.org/drm/intel/issues/54
  [i915#58]: https://gitlab.freedesktop.org/drm/intel/issues/58
  [i915#588]: https://gitlab.freedesktop.org/drm/intel/issues/588
  [i915#655]: https://gitlab.freedesktop.org/drm/intel/issues/655
  [i915#658]: https://gitlab.freedesktop.org/drm/intel/issues/658
  [i915#79]: https://gitlab.freedesktop.org/drm/intel/issues/79
  [i915#794]: https://gitlab.freedesktop.org/drm/intel/issues/794
  [i915#82]: https://gitlab.freedesktop.org/drm/intel/issues/82
  [i915#92]: https://gitlab.freedesktop.org/drm/intel/issues/92
  [i915#95]: https://gitlab.freedesktop.org/drm/intel/issues/95
  [k.org#198133]: https://bugzilla.kernel.org/show_bug.cgi?id=198133


Participating hosts (10 -> 10)
------------------------------

  No changes in participating hosts


Build changes
-------------

  * CI: CI-20190529 -> None
  * Linux: CI_DRM_8275 -> Patchwork_17253

  CI-20190529: 20190529
  CI_DRM_8275: f2a4da2bcd576d1b56aeb53600e8a0b710117a20 @ git://anongit.freedesktop.org/gfx-ci/linux
  IGT_5581: ab0620e555119ec55f12ba9ab9e6e9246d407648 @ git://anongit.freedesktop.org/xorg/app/intel-gpu-tools
  Patchwork_17253: 68e985f3b25a85cda132487d89625696488d1ed7 @ git://anongit.freedesktop.org/gfx-ci/linux
  piglit_4509: fdc5a4ca11124ab8413c7988896eec4c97336694 @ git://anongit.freedesktop.org/piglit

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_17253/index.html
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