[PATCH 1/5] drm/qxl: drop qxl_ttm_fault

[PATCH 1/5] drm/qxl: drop qxl_ttm_fault

[Gerd Hoffmann]

Not sure what this hook is supposed to do.  vmf->vma->vm_private_data
should never be NULL, so the extra check in qxl_ttm_fault should have no
effect.

Drop it.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 drivers/gpu/drm/qxl/qxl_ttm.c | 27 +--------------------------
 1 file changed, 1 insertion(+), 26 deletions(-)

diff --git a/drivers/gpu/drm/qxl/qxl_ttm.c b/drivers/gpu/drm/qxl/qxl_ttm.c
index cbc6c2ba8630..dba925589e17 100644
--- a/drivers/gpu/drm/qxl/qxl_ttm.c
+++ b/drivers/gpu/drm/qxl/qxl_ttm.c
@@ -48,24 +48,8 @@ static struct qxl_device *qxl_get_qdev(struct ttm_bo_device *bdev)
 	return qdev;
 }
 
-static struct vm_operations_struct qxl_ttm_vm_ops;
-static const struct vm_operations_struct *ttm_vm_ops;
-
-static vm_fault_t qxl_ttm_fault(struct vm_fault *vmf)
-{
-	struct ttm_buffer_object *bo;
-	vm_fault_t ret;
-
-	bo = (struct ttm_buffer_object *)vmf->vma->vm_private_data;
-	if (bo == NULL)
-		return VM_FAULT_NOPAGE;
-	ret = ttm_vm_ops->fault(vmf);
-	return ret;
-}
-
 int qxl_mmap(struct file *filp, struct vm_area_struct *vma)
 {
-	int r;
 	struct drm_file *file_priv = filp->private_data;
 	struct qxl_device *qdev = file_priv->minor->dev->dev_private;
 
@@ -77,16 +61,7 @@ int qxl_mmap(struct file *filp, struct vm_area_struct *vma)
 	DRM_DEBUG_DRIVER("filp->private_data = 0x%p, vma->vm_pgoff = %lx\n",
 		  filp->private_data, vma->vm_pgoff);
 
-	r = ttm_bo_mmap(filp, vma, &qdev->mman.bdev);
-	if (unlikely(r != 0))
-		return r;
-	if (unlikely(ttm_vm_ops == NULL)) {
-		ttm_vm_ops = vma->vm_ops;
-		qxl_ttm_vm_ops = *ttm_vm_ops;
-		qxl_ttm_vm_ops.fault = &qxl_ttm_fault;
-	}
-	vma->vm_ops = &qxl_ttm_vm_ops;
-	return 0;
+	return ttm_bo_mmap(filp, vma, &qdev->mman.bdev);
 }
 
 static int qxl_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
-- 
2.18.1

[PATCH 2/5] drm/qxl: switch qxl to &drm_gem_object_funcs.mmap

[Gerd Hoffmann]

Wire up the new drm_gem_ttm_mmap() helper function.
Use generic drm_gem_mmap() and remove qxl_mmap().

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 drivers/gpu/drm/qxl/qxl_drv.h    |  1 -
 drivers/gpu/drm/qxl/qxl_drv.c    |  2 +-
 drivers/gpu/drm/qxl/qxl_object.c |  1 +
 drivers/gpu/drm/qxl/qxl_ttm.c    | 16 ----------------
 4 files changed, 2 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/qxl/qxl_drv.h b/drivers/gpu/drm/qxl/qxl_drv.h
index d4051409ce64..a5cb3864d686 100644
--- a/drivers/gpu/drm/qxl/qxl_drv.h
+++ b/drivers/gpu/drm/qxl/qxl_drv.h
@@ -355,7 +355,6 @@ int qxl_mode_dumb_mmap(struct drm_file *filp,
 /* qxl ttm */
 int qxl_ttm_init(struct qxl_device *qdev);
 void qxl_ttm_fini(struct qxl_device *qdev);
-int qxl_mmap(struct file *filp, struct vm_area_struct *vma);
 
 /* qxl image */
 
diff --git a/drivers/gpu/drm/qxl/qxl_drv.c b/drivers/gpu/drm/qxl/qxl_drv.c
index 483b4c57554a..65464630ac98 100644
--- a/drivers/gpu/drm/qxl/qxl_drv.c
+++ b/drivers/gpu/drm/qxl/qxl_drv.c
@@ -157,7 +157,7 @@ static const struct file_operations qxl_fops = {
 	.unlocked_ioctl = drm_ioctl,
 	.poll = drm_poll,
 	.read = drm_read,
-	.mmap = qxl_mmap,
+	.mmap = drm_gem_mmap,
 };
 
 static int qxl_drm_freeze(struct drm_device *dev)
diff --git a/drivers/gpu/drm/qxl/qxl_object.c b/drivers/gpu/drm/qxl/qxl_object.c
index c013c516f561..927ab917b834 100644
--- a/drivers/gpu/drm/qxl/qxl_object.c
+++ b/drivers/gpu/drm/qxl/qxl_object.c
@@ -86,6 +86,7 @@ static const struct drm_gem_object_funcs qxl_object_funcs = {
 	.get_sg_table = qxl_gem_prime_get_sg_table,
 	.vmap = qxl_gem_prime_vmap,
 	.vunmap = qxl_gem_prime_vunmap,
+	.mmap = drm_gem_ttm_mmap,
 	.print_info = drm_gem_ttm_print_info,
 };
 
diff --git a/drivers/gpu/drm/qxl/qxl_ttm.c b/drivers/gpu/drm/qxl/qxl_ttm.c
index dba925589e17..629ac8e77a21 100644
--- a/drivers/gpu/drm/qxl/qxl_ttm.c
+++ b/drivers/gpu/drm/qxl/qxl_ttm.c
@@ -48,22 +48,6 @@ static struct qxl_device *qxl_get_qdev(struct ttm_bo_device *bdev)
 	return qdev;
 }
 
-int qxl_mmap(struct file *filp, struct vm_area_struct *vma)
-{
-	struct drm_file *file_priv = filp->private_data;
-	struct qxl_device *qdev = file_priv->minor->dev->dev_private;
-
-	if (qdev == NULL) {
-		DRM_ERROR(
-		 "filp->private_data->minor->dev->dev_private == NULL\n");
-		return -EINVAL;
-	}
-	DRM_DEBUG_DRIVER("filp->private_data = 0x%p, vma->vm_pgoff = %lx\n",
-		  filp->private_data, vma->vm_pgoff);
-
-	return ttm_bo_mmap(filp, vma, &qdev->mman.bdev);
-}
-
 static int qxl_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
 {
 	return 0;
-- 
2.18.1

[PATCH 3/5] drm/qxl: drop verify_access

[Gerd Hoffmann]

Not needed any more.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 drivers/gpu/drm/qxl/qxl_ttm.c | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/drivers/gpu/drm/qxl/qxl_ttm.c b/drivers/gpu/drm/qxl/qxl_ttm.c
index 629ac8e77a21..54cc5a5b607e 100644
--- a/drivers/gpu/drm/qxl/qxl_ttm.c
+++ b/drivers/gpu/drm/qxl/qxl_ttm.c
@@ -110,14 +110,6 @@ static void qxl_evict_flags(struct ttm_buffer_object *bo,
 	*placement = qbo->placement;
 }
 
-static int qxl_verify_access(struct ttm_buffer_object *bo, struct file *filp)
-{
-	struct qxl_bo *qbo = to_qxl_bo(bo);
-
-	return drm_vma_node_verify_access(&qbo->tbo.base.vma_node,
-					  filp->private_data);
-}
-
 static int qxl_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
 				  struct ttm_mem_reg *mem)
 {
@@ -269,7 +261,6 @@ static struct ttm_bo_driver qxl_bo_driver = {
 	.eviction_valuable = ttm_bo_eviction_valuable,
 	.evict_flags = &qxl_evict_flags,
 	.move = &qxl_bo_move,
-	.verify_access = &qxl_verify_access,
 	.io_mem_reserve = &qxl_ttm_io_mem_reserve,
 	.io_mem_free = &qxl_ttm_io_mem_free,
 	.move_notify = &qxl_bo_move_notify,
-- 
2.18.1

[PATCH 4/5] drm/qxl: use DEFINE_DRM_GEM_FOPS()

[Gerd Hoffmann]

We have no qxl-specific fops any more.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 drivers/gpu/drm/qxl/qxl_drv.c | 10 +---------
 1 file changed, 1 insertion(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/qxl/qxl_drv.c b/drivers/gpu/drm/qxl/qxl_drv.c
index 65464630ac98..1d601f57a6ba 100644
--- a/drivers/gpu/drm/qxl/qxl_drv.c
+++ b/drivers/gpu/drm/qxl/qxl_drv.c
@@ -150,15 +150,7 @@ qxl_pci_remove(struct pci_dev *pdev)
 	drm_dev_put(dev);
 }
 
-static const struct file_operations qxl_fops = {
-	.owner = THIS_MODULE,
-	.open = drm_open,
-	.release = drm_release,
-	.unlocked_ioctl = drm_ioctl,
-	.poll = drm_poll,
-	.read = drm_read,
-	.mmap = drm_gem_mmap,
-};
+DEFINE_DRM_GEM_FOPS(qxl_fops);
 
 static int qxl_drm_freeze(struct drm_device *dev)
 {
-- 
2.18.1

[PATCH 5/5] drm/qxl: allocate small objects top-down

[Gerd Hoffmann]

qxl uses small buffer objects for qxl commands.
Allocate them top-down to reduce fragmentation.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 drivers/gpu/drm/qxl/qxl_object.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/qxl/qxl_object.c b/drivers/gpu/drm/qxl/qxl_object.c
index 927ab917b834..ad336c98a0cf 100644
--- a/drivers/gpu/drm/qxl/qxl_object.c
+++ b/drivers/gpu/drm/qxl/qxl_object.c
@@ -54,9 +54,14 @@ bool qxl_ttm_bo_is_qxl_bo(struct ttm_buffer_object *bo)
 void qxl_ttm_placement_from_domain(struct qxl_bo *qbo, u32 domain, bool pinned)
 {
 	u32 c = 0;
-	u32 pflag = pinned ? TTM_PL_FLAG_NO_EVICT : 0;
+	u32 pflag = 0;
 	unsigned int i;
 
+	if (pinned)
+		pflag |= TTM_PL_FLAG_NO_EVICT;
+	if (qbo->tbo.base.size <= PAGE_SIZE)
+		pflag |= TTM_PL_FLAG_TOPDOWN;
+
 	qbo->placement.placement = qbo->placements;
 	qbo->placement.busy_placement = qbo->placements;
 	if (domain == QXL_GEM_DOMAIN_VRAM)
-- 
2.18.1