* [PATCH 1/2] drm/ttm: cleanup ttm_mem_type_manager_func.get_node interface v2
@ 2020-06-29 12:21 Christian König
2020-06-29 12:21 ` [PATCH 2/2] drm/ttm: make TT creation purely optional v2 Christian König
2020-06-29 13:45 ` [PATCH 1/2] drm/ttm: cleanup ttm_mem_type_manager_func.get_node interface v2 Ruhl, Michael J
0 siblings, 2 replies; 4+ messages in thread
From: Christian König @ 2020-06-29 12:21 UTC (permalink / raw)
To: dri-devel
Instead of signaling failure by setting the node pointer to
NULL do so by returning -ENOSPC.
v2: add memset() to make sure that mem is always initialized.
Signed-off-by: Christian König <christian.koenig@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c | 4 +---
drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 5 ++---
drivers/gpu/drm/nouveau/nouveau_ttm.c | 8 --------
drivers/gpu/drm/ttm/ttm_bo.c | 12 ++++++------
drivers/gpu/drm/ttm/ttm_bo_manager.c | 2 +-
drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c | 4 +---
6 files changed, 11 insertions(+), 24 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
index 627104401e84..2baa80224fa4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
@@ -229,7 +229,7 @@ static int amdgpu_gtt_mgr_new(struct ttm_mem_type_manager *man,
if ((&tbo->mem == mem || tbo->mem.mem_type != TTM_PL_TT) &&
atomic64_read(&mgr->available) < mem->num_pages) {
spin_unlock(&mgr->lock);
- return 0;
+ return -ENOSPC;
}
atomic64_sub(mem->num_pages, &mgr->available);
spin_unlock(&mgr->lock);
@@ -249,8 +249,6 @@ static int amdgpu_gtt_mgr_new(struct ttm_mem_type_manager *man,
r = amdgpu_gtt_mgr_alloc(man, tbo, place, mem);
if (unlikely(r)) {
kfree(node);
- mem->mm_node = NULL;
- r = 0;
goto err_out;
}
} else {
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
index 128a667ed8fa..e8d1dd564006 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
@@ -336,8 +336,7 @@ static int amdgpu_vram_mgr_new(struct ttm_mem_type_manager *man,
mem_bytes = (u64)mem->num_pages << PAGE_SHIFT;
if (atomic64_add_return(mem_bytes, &mgr->usage) > max_bytes) {
atomic64_sub(mem_bytes, &mgr->usage);
- mem->mm_node = NULL;
- return 0;
+ return -ENOSPC;
}
if (place->flags & TTM_PL_FLAG_CONTIGUOUS) {
@@ -417,7 +416,7 @@ static int amdgpu_vram_mgr_new(struct ttm_mem_type_manager *man,
atomic64_sub(mem->num_pages << PAGE_SHIFT, &mgr->usage);
kvfree(nodes);
- return r == -ENOSPC ? 0 : r;
+ return r;
}
/**
diff --git a/drivers/gpu/drm/nouveau/nouveau_ttm.c b/drivers/gpu/drm/nouveau/nouveau_ttm.c
index 7ca0a2498532..e89ea052cf71 100644
--- a/drivers/gpu/drm/nouveau/nouveau_ttm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_ttm.c
@@ -75,10 +75,6 @@ nouveau_vram_manager_new(struct ttm_mem_type_manager *man,
ret = nouveau_mem_vram(reg, nvbo->contig, nvbo->page);
if (ret) {
nouveau_mem_del(reg);
- if (ret == -ENOSPC) {
- reg->mm_node = NULL;
- return 0;
- }
return ret;
}
@@ -139,10 +135,6 @@ nv04_gart_manager_new(struct ttm_mem_type_manager *man,
reg->num_pages << PAGE_SHIFT, &mem->vma[0]);
if (ret) {
nouveau_mem_del(reg);
- if (ret == -ENOSPC) {
- reg->mm_node = NULL;
- return 0;
- }
return ret;
}
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index f78cfc76ad78..06b8bc0d8f23 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -909,10 +909,10 @@ static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo,
ticket = dma_resv_locking_ctx(bo->base.resv);
do {
ret = (*man->func->get_node)(man, bo, place, mem);
- if (unlikely(ret != 0))
- return ret;
- if (mem->mm_node)
+ if (likely(!ret))
break;
+ if (unlikely(ret != -ENOSPC))
+ return ret;
ret = ttm_mem_evict_first(bdev, mem->mem_type, place, ctx,
ticket);
if (unlikely(ret != 0))
@@ -1056,12 +1056,11 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
man = &bdev->man[mem->mem_type];
ret = (*man->func->get_node)(man, bo, place, mem);
+ if (ret == -ENOSPC)
+ continue;
if (unlikely(ret))
goto error;
- if (!mem->mm_node)
- continue;
-
ret = ttm_bo_add_move_fence(bo, man, mem, ctx->no_wait_gpu);
if (unlikely(ret)) {
(*man->func->put_node)(man, mem);
@@ -1121,6 +1120,7 @@ static int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
dma_resv_assert_held(bo->base.resv);
+ memset(&mem, 0, sizeof(mem));
mem.num_pages = bo->num_pages;
mem.size = mem.num_pages << PAGE_SHIFT;
mem.page_alignment = bo->mem.page_alignment;
diff --git a/drivers/gpu/drm/ttm/ttm_bo_manager.c b/drivers/gpu/drm/ttm/ttm_bo_manager.c
index 18d3debcc949..facd3049c3aa 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_manager.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_manager.c
@@ -86,7 +86,7 @@ static int ttm_bo_man_get_node(struct ttm_mem_type_manager *man,
mem->start = node->start;
}
- return 0;
+ return ret;
}
static void ttm_bo_man_put_node(struct ttm_mem_type_manager *man,
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c b/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c
index 7da752ca1c34..4a76fc7114ad 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c
@@ -53,8 +53,6 @@ static int vmw_gmrid_man_get_node(struct ttm_mem_type_manager *man,
(struct vmwgfx_gmrid_man *)man->priv;
int id;
- mem->mm_node = NULL;
-
id = ida_alloc_max(&gman->gmr_ida, gman->max_gmr_ids - 1, GFP_KERNEL);
if (id < 0)
return (id != -ENOMEM ? 0 : id);
@@ -78,7 +76,7 @@ static int vmw_gmrid_man_get_node(struct ttm_mem_type_manager *man,
gman->used_gmr_pages -= bo->num_pages;
spin_unlock(&gman->lock);
ida_free(&gman->gmr_ida, id);
- return 0;
+ return -ENOSPC;
}
static void vmw_gmrid_man_put_node(struct ttm_mem_type_manager *man,
--
2.17.1
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dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH 2/2] drm/ttm: make TT creation purely optional v2
2020-06-29 12:21 [PATCH 1/2] drm/ttm: cleanup ttm_mem_type_manager_func.get_node interface v2 Christian König
@ 2020-06-29 12:21 ` Christian König
2020-06-29 13:52 ` Ruhl, Michael J
2020-06-29 13:45 ` [PATCH 1/2] drm/ttm: cleanup ttm_mem_type_manager_func.get_node interface v2 Ruhl, Michael J
1 sibling, 1 reply; 4+ messages in thread
From: Christian König @ 2020-06-29 12:21 UTC (permalink / raw)
To: dri-devel
We only need the page array when the BO is about to be accessed.
So not only populate, but also create it on demand.
v2: move NULL check into ttm_tt_create()
Signed-off-by: Christian König <christian.koenig@amd.com>
---
drivers/gpu/drm/ttm/ttm_bo.c | 37 ++++++++-----------------------
drivers/gpu/drm/ttm/ttm_bo_util.c | 9 ++++++--
drivers/gpu/drm/ttm/ttm_bo_vm.c | 5 +++++
drivers/gpu/drm/ttm/ttm_tt.c | 4 +++-
4 files changed, 24 insertions(+), 31 deletions(-)
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 06b8bc0d8f23..c8c25e45751a 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -292,12 +292,11 @@ static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
*/
if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) {
- if (bo->ttm == NULL) {
- bool zero = !(old_man->flags & TTM_MEMTYPE_FLAG_FIXED);
- ret = ttm_tt_create(bo, zero);
- if (ret)
- goto out_err;
- }
+ bool zero = !(old_man->flags & TTM_MEMTYPE_FLAG_FIXED);
+
+ ret = ttm_tt_create(bo, zero);
+ if (ret)
+ goto out_err;
ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement);
if (ret)
@@ -660,13 +659,8 @@ static int ttm_bo_evict(struct ttm_buffer_object *bo,
placement.num_busy_placement = 0;
bdev->driver->evict_flags(bo, &placement);
- if (!placement.num_placement && !placement.num_busy_placement) {
- ret = ttm_bo_pipeline_gutting(bo);
- if (ret)
- return ret;
-
- return ttm_tt_create(bo, false);
- }
+ if (!placement.num_placement && !placement.num_busy_placement)
+ return ttm_bo_pipeline_gutting(bo);
evict_mem = bo->mem;
evict_mem.mm_node = NULL;
@@ -1194,13 +1188,8 @@ int ttm_bo_validate(struct ttm_buffer_object *bo,
/*
* Remove the backing store if no placement is given.
*/
- if (!placement->num_placement && !placement->num_busy_placement) {
- ret = ttm_bo_pipeline_gutting(bo);
- if (ret)
- return ret;
-
- return ttm_tt_create(bo, false);
- }
+ if (!placement->num_placement && !placement->num_busy_placement)
+ return ttm_bo_pipeline_gutting(bo);
/*
* Check whether we need to move buffer.
@@ -1217,14 +1206,6 @@ int ttm_bo_validate(struct ttm_buffer_object *bo,
ttm_flag_masked(&bo->mem.placement, new_flags,
~TTM_PL_MASK_MEMTYPE);
}
- /*
- * We might need to add a TTM.
- */
- if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
- ret = ttm_tt_create(bo, true);
- if (ret)
- return ret;
- }
return 0;
}
EXPORT_SYMBOL(ttm_bo_validate);
diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c
index 52d2b71f1588..f8414f820350 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_util.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
@@ -580,12 +580,17 @@ static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo,
.interruptible = false,
.no_wait_gpu = false
};
- struct ttm_tt *ttm = bo->ttm;
+ struct ttm_tt *ttm;
pgprot_t prot;
int ret;
- BUG_ON(!ttm);
+ if (!bo->ttm) {
+ ret = ttm_tt_create(bo, true);
+ if (ret)
+ return ret;
+ }
+ ttm = bo->ttm;
ret = ttm_tt_populate(ttm, &ctx);
if (ret)
return ret;
diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c
index 0ad30b112982..0586870ab642 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_vm.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c
@@ -349,6 +349,11 @@ vm_fault_t ttm_bo_vm_fault_reserved(struct vm_fault *vmf,
};
+ if (ttm_tt_create(bo, true)) {
+ ret = VM_FAULT_OOM;
+ goto out_io_unlock;
+ }
+
ttm = bo->ttm;
if (ttm_tt_populate(bo->ttm, &ctx)) {
ret = VM_FAULT_OOM;
diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
index 2ec448e1d663..e25d4097aa16 100644
--- a/drivers/gpu/drm/ttm/ttm_tt.c
+++ b/drivers/gpu/drm/ttm/ttm_tt.c
@@ -50,6 +50,9 @@ int ttm_tt_create(struct ttm_buffer_object *bo, bool zero_alloc)
dma_resv_assert_held(bo->base.resv);
+ if (bo->ttm)
+ return 0;
+
if (bdev->need_dma32)
page_flags |= TTM_PAGE_FLAG_DMA32;
@@ -67,7 +70,6 @@ int ttm_tt_create(struct ttm_buffer_object *bo, bool zero_alloc)
page_flags |= TTM_PAGE_FLAG_SG;
break;
default:
- bo->ttm = NULL;
pr_err("Illegal buffer object type\n");
return -EINVAL;
}
--
2.17.1
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply related [flat|nested] 4+ messages in thread
* RE: [PATCH 1/2] drm/ttm: cleanup ttm_mem_type_manager_func.get_node interface v2
2020-06-29 12:21 [PATCH 1/2] drm/ttm: cleanup ttm_mem_type_manager_func.get_node interface v2 Christian König
2020-06-29 12:21 ` [PATCH 2/2] drm/ttm: make TT creation purely optional v2 Christian König
@ 2020-06-29 13:45 ` Ruhl, Michael J
1 sibling, 0 replies; 4+ messages in thread
From: Ruhl, Michael J @ 2020-06-29 13:45 UTC (permalink / raw)
To: Christian König, dri-devel
>-----Original Message-----
>From: dri-devel <dri-devel-bounces@lists.freedesktop.org> On Behalf Of
>Christian König
>Sent: Monday, June 29, 2020 8:22 AM
>To: dri-devel@lists.freedesktop.org
>Subject: [PATCH 1/2] drm/ttm: cleanup
>ttm_mem_type_manager_func.get_node interface v2
>
>Instead of signaling failure by setting the node pointer to
>NULL do so by returning -ENOSPC.
>
>v2: add memset() to make sure that mem is always initialized.
>
>Signed-off-by: Christian König <christian.koenig@amd.com>
>---
> drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c | 4 +---
> drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 5 ++---
> drivers/gpu/drm/nouveau/nouveau_ttm.c | 8 --------
> drivers/gpu/drm/ttm/ttm_bo.c | 12 ++++++------
> drivers/gpu/drm/ttm/ttm_bo_manager.c | 2 +-
> drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c | 4 +---
> 6 files changed, 11 insertions(+), 24 deletions(-)
>
>diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
>b/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
>index 627104401e84..2baa80224fa4 100644
>--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
>+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
>@@ -229,7 +229,7 @@ static int amdgpu_gtt_mgr_new(struct
>ttm_mem_type_manager *man,
> if ((&tbo->mem == mem || tbo->mem.mem_type != TTM_PL_TT) &&
> atomic64_read(&mgr->available) < mem->num_pages) {
> spin_unlock(&mgr->lock);
>- return 0;
>+ return -ENOSPC;
> }
> atomic64_sub(mem->num_pages, &mgr->available);
> spin_unlock(&mgr->lock);
>@@ -249,8 +249,6 @@ static int amdgpu_gtt_mgr_new(struct
>ttm_mem_type_manager *man,
> r = amdgpu_gtt_mgr_alloc(man, tbo, place, mem);
> if (unlikely(r)) {
> kfree(node);
>- mem->mm_node = NULL;
>- r = 0;
I think that this one is still a problem. The code path sets:
mem->mm_node = node;
(about 3 lines above this chunk, and then calls
amdgpu_gtt_mgr_malloc()
If amdgpu_gtt_mgr_malloc() fails, mm_node is still set. I think you need to keep
this mm_node = NULL setting, or the path needs to be modified to not set mm_node.
> goto err_out;
> }
> } else {
>diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>index 128a667ed8fa..e8d1dd564006 100644
>--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>@@ -336,8 +336,7 @@ static int amdgpu_vram_mgr_new(struct
>ttm_mem_type_manager *man,
> mem_bytes = (u64)mem->num_pages << PAGE_SHIFT;
> if (atomic64_add_return(mem_bytes, &mgr->usage) > max_bytes) {
> atomic64_sub(mem_bytes, &mgr->usage);
>- mem->mm_node = NULL;
>- return 0;
>+ return -ENOSPC;
> }
>
> if (place->flags & TTM_PL_FLAG_CONTIGUOUS) {
>@@ -417,7 +416,7 @@ static int amdgpu_vram_mgr_new(struct
>ttm_mem_type_manager *man,
> atomic64_sub(mem->num_pages << PAGE_SHIFT, &mgr->usage);
>
> kvfree(nodes);
>- return r == -ENOSPC ? 0 : r;
>+ return r;
> }
>
> /**
>diff --git a/drivers/gpu/drm/nouveau/nouveau_ttm.c
>b/drivers/gpu/drm/nouveau/nouveau_ttm.c
>index 7ca0a2498532..e89ea052cf71 100644
>--- a/drivers/gpu/drm/nouveau/nouveau_ttm.c
>+++ b/drivers/gpu/drm/nouveau/nouveau_ttm.c
>@@ -75,10 +75,6 @@ nouveau_vram_manager_new(struct
>ttm_mem_type_manager *man,
> ret = nouveau_mem_vram(reg, nvbo->contig, nvbo->page);
> if (ret) {
> nouveau_mem_del(reg);
>- if (ret == -ENOSPC) {
>- reg->mm_node = NULL;
>- return 0;
>- }
> return ret;
> }
>
>@@ -139,10 +135,6 @@ nv04_gart_manager_new(struct
>ttm_mem_type_manager *man,
> reg->num_pages << PAGE_SHIFT, &mem->vma[0]);
> if (ret) {
> nouveau_mem_del(reg);
>- if (ret == -ENOSPC) {
>- reg->mm_node = NULL;
>- return 0;
>- }
> return ret;
> }
>
>diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
>index f78cfc76ad78..06b8bc0d8f23 100644
>--- a/drivers/gpu/drm/ttm/ttm_bo.c
>+++ b/drivers/gpu/drm/ttm/ttm_bo.c
>@@ -909,10 +909,10 @@ static int ttm_bo_mem_force_space(struct
>ttm_buffer_object *bo,
> ticket = dma_resv_locking_ctx(bo->base.resv);
> do {
> ret = (*man->func->get_node)(man, bo, place, mem);
>- if (unlikely(ret != 0))
>- return ret;
>- if (mem->mm_node)
>+ if (likely(!ret))
> break;
>+ if (unlikely(ret != -ENOSPC))
>+ return ret;
> ret = ttm_mem_evict_first(bdev, mem->mem_type, place,
>ctx,
> ticket);
> if (unlikely(ret != 0))
>@@ -1056,12 +1056,11 @@ int ttm_bo_mem_space(struct ttm_buffer_object
>*bo,
>
> man = &bdev->man[mem->mem_type];
> ret = (*man->func->get_node)(man, bo, place, mem);
>+ if (ret == -ENOSPC)
>+ continue;
> if (unlikely(ret))
> goto error;
>
>- if (!mem->mm_node)
>- continue;
>-
> ret = ttm_bo_add_move_fence(bo, man, mem, ctx-
>>no_wait_gpu);
> if (unlikely(ret)) {
> (*man->func->put_node)(man, mem);
>@@ -1121,6 +1120,7 @@ static int ttm_bo_move_buffer(struct
>ttm_buffer_object *bo,
>
> dma_resv_assert_held(bo->base.resv);
>
>+ memset(&mem, 0, sizeof(mem));
I missed this completely. Setting this here:
mm.mm_node = NULL;
is probably sufficient. The other call sites do this instead of the memset().
Mike
> mem.num_pages = bo->num_pages;
> mem.size = mem.num_pages << PAGE_SHIFT;
> mem.page_alignment = bo->mem.page_alignment;
>diff --git a/drivers/gpu/drm/ttm/ttm_bo_manager.c
>b/drivers/gpu/drm/ttm/ttm_bo_manager.c
>index 18d3debcc949..facd3049c3aa 100644
>--- a/drivers/gpu/drm/ttm/ttm_bo_manager.c
>+++ b/drivers/gpu/drm/ttm/ttm_bo_manager.c
>@@ -86,7 +86,7 @@ static int ttm_bo_man_get_node(struct
>ttm_mem_type_manager *man,
> mem->start = node->start;
> }
>
>- return 0;
>+ return ret;
> }
>
> static void ttm_bo_man_put_node(struct ttm_mem_type_manager *man,
>diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c
>b/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c
>index 7da752ca1c34..4a76fc7114ad 100644
>--- a/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c
>+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c
>@@ -53,8 +53,6 @@ static int vmw_gmrid_man_get_node(struct
>ttm_mem_type_manager *man,
> (struct vmwgfx_gmrid_man *)man->priv;
> int id;
>
>- mem->mm_node = NULL;
>-
> id = ida_alloc_max(&gman->gmr_ida, gman->max_gmr_ids - 1,
>GFP_KERNEL);
> if (id < 0)
> return (id != -ENOMEM ? 0 : id);
>@@ -78,7 +76,7 @@ static int vmw_gmrid_man_get_node(struct
>ttm_mem_type_manager *man,
> gman->used_gmr_pages -= bo->num_pages;
> spin_unlock(&gman->lock);
> ida_free(&gman->gmr_ida, id);
>- return 0;
>+ return -ENOSPC;
> }
>
> static void vmw_gmrid_man_put_node(struct ttm_mem_type_manager
>*man,
>--
>2.17.1
>
>_______________________________________________
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^ permalink raw reply [flat|nested] 4+ messages in thread
* RE: [PATCH 2/2] drm/ttm: make TT creation purely optional v2
2020-06-29 12:21 ` [PATCH 2/2] drm/ttm: make TT creation purely optional v2 Christian König
@ 2020-06-29 13:52 ` Ruhl, Michael J
0 siblings, 0 replies; 4+ messages in thread
From: Ruhl, Michael J @ 2020-06-29 13:52 UTC (permalink / raw)
To: Christian König, dri-devel
>-----Original Message-----
>From: dri-devel <dri-devel-bounces@lists.freedesktop.org> On Behalf Of
>Christian König
>Sent: Monday, June 29, 2020 8:22 AM
>To: dri-devel@lists.freedesktop.org
>Subject: [PATCH 2/2] drm/ttm: make TT creation purely optional v2
>
>We only need the page array when the BO is about to be accessed.
>
>So not only populate, but also create it on demand.
>
>v2: move NULL check into ttm_tt_create()
>
>Signed-off-by: Christian König <christian.koenig@amd.com>
>---
> drivers/gpu/drm/ttm/ttm_bo.c | 37 ++++++++-----------------------
> drivers/gpu/drm/ttm/ttm_bo_util.c | 9 ++++++--
> drivers/gpu/drm/ttm/ttm_bo_vm.c | 5 +++++
> drivers/gpu/drm/ttm/ttm_tt.c | 4 +++-
> 4 files changed, 24 insertions(+), 31 deletions(-)
>
>diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
>index 06b8bc0d8f23..c8c25e45751a 100644
>--- a/drivers/gpu/drm/ttm/ttm_bo.c
>+++ b/drivers/gpu/drm/ttm/ttm_bo.c
>@@ -292,12 +292,11 @@ static int ttm_bo_handle_move_mem(struct
>ttm_buffer_object *bo,
> */
>
> if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) {
>- if (bo->ttm == NULL) {
>- bool zero = !(old_man->flags &
>TTM_MEMTYPE_FLAG_FIXED);
>- ret = ttm_tt_create(bo, zero);
>- if (ret)
>- goto out_err;
>- }
>+ bool zero = !(old_man->flags &
>TTM_MEMTYPE_FLAG_FIXED);
>+
>+ ret = ttm_tt_create(bo, zero);
>+ if (ret)
>+ goto out_err;
>
> ret = ttm_tt_set_placement_caching(bo->ttm, mem-
>>placement);
> if (ret)
>@@ -660,13 +659,8 @@ static int ttm_bo_evict(struct ttm_buffer_object *bo,
> placement.num_busy_placement = 0;
> bdev->driver->evict_flags(bo, &placement);
>
>- if (!placement.num_placement &&
>!placement.num_busy_placement) {
>- ret = ttm_bo_pipeline_gutting(bo);
>- if (ret)
>- return ret;
>-
>- return ttm_tt_create(bo, false);
>- }
>+ if (!placement.num_placement &&
>!placement.num_busy_placement)
>+ return ttm_bo_pipeline_gutting(bo);
>
> evict_mem = bo->mem;
> evict_mem.mm_node = NULL;
>@@ -1194,13 +1188,8 @@ int ttm_bo_validate(struct ttm_buffer_object *bo,
> /*
> * Remove the backing store if no placement is given.
> */
>- if (!placement->num_placement && !placement-
>>num_busy_placement) {
>- ret = ttm_bo_pipeline_gutting(bo);
>- if (ret)
>- return ret;
>-
>- return ttm_tt_create(bo, false);
>- }
>+ if (!placement->num_placement && !placement-
>>num_busy_placement)
>+ return ttm_bo_pipeline_gutting(bo);
>
> /*
> * Check whether we need to move buffer.
>@@ -1217,14 +1206,6 @@ int ttm_bo_validate(struct ttm_buffer_object *bo,
> ttm_flag_masked(&bo->mem.placement, new_flags,
> ~TTM_PL_MASK_MEMTYPE);
> }
>- /*
>- * We might need to add a TTM.
>- */
>- if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
>- ret = ttm_tt_create(bo, true);
>- if (ret)
>- return ret;
>- }
> return 0;
> }
> EXPORT_SYMBOL(ttm_bo_validate);
>diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c
>b/drivers/gpu/drm/ttm/ttm_bo_util.c
>index 52d2b71f1588..f8414f820350 100644
>--- a/drivers/gpu/drm/ttm/ttm_bo_util.c
>+++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
>@@ -580,12 +580,17 @@ static int ttm_bo_kmap_ttm(struct
>ttm_buffer_object *bo,
> .interruptible = false,
> .no_wait_gpu = false
> };
>- struct ttm_tt *ttm = bo->ttm;
>+ struct ttm_tt *ttm;
> pgprot_t prot;
> int ret;
>
>- BUG_ON(!ttm);
>+ if (!bo->ttm) {
>+ ret = ttm_tt_create(bo, true);
>+ if (ret)
>+ return ret;
>+ }
I think that this chunk can be reduced to:
ret = ttm_tt_create(bo, true);
if (ret)
return ret;
?
With that change (unless I missed something here?):
Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Mike
>
>+ ttm = bo->ttm;
> ret = ttm_tt_populate(ttm, &ctx);
> if (ret)
> return ret;
>diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c
>b/drivers/gpu/drm/ttm/ttm_bo_vm.c
>index 0ad30b112982..0586870ab642 100644
>--- a/drivers/gpu/drm/ttm/ttm_bo_vm.c
>+++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c
>@@ -349,6 +349,11 @@ vm_fault_t ttm_bo_vm_fault_reserved(struct
>vm_fault *vmf,
>
> };
>
>+ if (ttm_tt_create(bo, true)) {
>+ ret = VM_FAULT_OOM;
>+ goto out_io_unlock;
>+ }
>+
> ttm = bo->ttm;
> if (ttm_tt_populate(bo->ttm, &ctx)) {
> ret = VM_FAULT_OOM;
>diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
>index 2ec448e1d663..e25d4097aa16 100644
>--- a/drivers/gpu/drm/ttm/ttm_tt.c
>+++ b/drivers/gpu/drm/ttm/ttm_tt.c
>@@ -50,6 +50,9 @@ int ttm_tt_create(struct ttm_buffer_object *bo, bool
>zero_alloc)
>
> dma_resv_assert_held(bo->base.resv);
>
>+ if (bo->ttm)
>+ return 0;
>+
> if (bdev->need_dma32)
> page_flags |= TTM_PAGE_FLAG_DMA32;
>
>@@ -67,7 +70,6 @@ int ttm_tt_create(struct ttm_buffer_object *bo, bool
>zero_alloc)
> page_flags |= TTM_PAGE_FLAG_SG;
> break;
> default:
>- bo->ttm = NULL;
> pr_err("Illegal buffer object type\n");
> return -EINVAL;
> }
>--
>2.17.1
>
>_______________________________________________
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>dri-devel@lists.freedesktop.org
>https://lists.freedesktop.org/mailman/listinfo/dri-devel
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^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2020-06-29 13:52 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-06-29 12:21 [PATCH 1/2] drm/ttm: cleanup ttm_mem_type_manager_func.get_node interface v2 Christian König
2020-06-29 12:21 ` [PATCH 2/2] drm/ttm: make TT creation purely optional v2 Christian König
2020-06-29 13:52 ` Ruhl, Michael J
2020-06-29 13:45 ` [PATCH 1/2] drm/ttm: cleanup ttm_mem_type_manager_func.get_node interface v2 Ruhl, Michael J
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