From: Ankitprasad Sharma <ankitprasad.r.sha...@intel.com>
Propagating correct error codes to userspace by using ERR_PTR and
PTR_ERR macros for stolen memory based object allocation. We generally
return -ENOMEM to the user whenever there is a failure in object
allocation. This patch helps user to identify the correct reason for the
failure and not just -ENOMEM each time.
v2: Moved the patch up in the series, added error propagation for
i915_gem_alloc_object too (Chris)
Signed-off-by: Ankitprasad Sharma <ankitprasad.r.sha...@intel.com>
---
drivers/gpu/drm/i915/i915_gem.c | 15 +++++-----
drivers/gpu/drm/i915/i915_gem_batch_pool.c | 4 +--
drivers/gpu/drm/i915/i915_gem_context.c | 4 +--
drivers/gpu/drm/i915/i915_gem_render_state.c | 4 +--
drivers/gpu/drm/i915/i915_gem_stolen.c | 43 ++++++++++++++++------------
drivers/gpu/drm/i915/i915_guc_submission.c | 4 +--
drivers/gpu/drm/i915/intel_display.c | 2 +-
drivers/gpu/drm/i915/intel_fbdev.c | 6 ++--
drivers/gpu/drm/i915/intel_lrc.c | 8 +++---
drivers/gpu/drm/i915/intel_overlay.c | 4 +--
drivers/gpu/drm/i915/intel_pm.c | 2 +-
drivers/gpu/drm/i915/intel_ringbuffer.c | 20 ++++++-------
12 files changed, 61 insertions(+), 55 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index d3f4321..54f7df1 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -393,9 +393,9 @@ i915_gem_create(struct drm_file *file,
if (flags & I915_CREATE_PLACEMENT_STOLEN) {
mutex_lock(&dev->struct_mutex);
obj = i915_gem_object_create_stolen(dev, size);
- if (!obj) {
+ if (IS_ERR(obj)) {
mutex_unlock(&dev->struct_mutex);
- return -ENOMEM;
+ return PTR_ERR(obj);
}
/* Always clear fresh buffers before handing to userspace */
@@ -411,8 +411,8 @@ i915_gem_create(struct drm_file *file,
obj = i915_gem_alloc_object(dev, size);
}
- if (obj == NULL)
- return -ENOMEM;
+ if (IS_ERR(obj))
+ return PTR_ERR(obj);
ret = drm_gem_handle_create(file, &obj->base, &handle);
/* drop reference from allocate - handle holds it now */
@@ -4273,14 +4273,15 @@ struct drm_i915_gem_object
*i915_gem_alloc_object(struct drm_device *dev,
struct drm_i915_gem_object *obj;
struct address_space *mapping;
gfp_t mask;
+ int ret = 0;
obj = i915_gem_object_alloc(dev);
if (obj == NULL)
- return NULL;
+ return ERR_PTR(-ENOMEM);
- if (drm_gem_object_init(dev, &obj->base, size) != 0) {
+ if ((ret = drm_gem_object_init(dev, &obj->base, size)) != 0) {
i915_gem_object_free(obj);
- return NULL;
+ return ERR_PTR(ret);
}
mask = GFP_HIGHUSER | __GFP_RECLAIMABLE;
diff --git a/drivers/gpu/drm/i915/i915_gem_batch_pool.c
b/drivers/gpu/drm/i915/i915_gem_batch_pool.c
index 7bf2f3f..d79caa2 100644
--- a/drivers/gpu/drm/i915/i915_gem_batch_pool.c
+++ b/drivers/gpu/drm/i915/i915_gem_batch_pool.c
@@ -135,8 +135,8 @@ i915_gem_batch_pool_get(struct i915_gem_batch_pool *pool,
int ret;
obj = i915_gem_alloc_object(pool->dev, size);
- if (obj == NULL)
- return ERR_PTR(-ENOMEM);
+ if (IS_ERR(obj))
+ return obj;
ret = i915_gem_object_get_pages(obj);
if (ret)
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c
b/drivers/gpu/drm/i915/i915_gem_context.c
index 74aa0c9..603600c 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -157,8 +157,8 @@ i915_gem_alloc_context_obj(struct drm_device *dev, size_t
size)
int ret;
obj = i915_gem_alloc_object(dev, size);
- if (obj == NULL)
- return ERR_PTR(-ENOMEM);
+ if (IS_ERR(obj))
+ return obj;
/*
* Try to make the context utilize L3 as well as LLC.
diff --git a/drivers/gpu/drm/i915/i915_gem_render_state.c
b/drivers/gpu/drm/i915/i915_gem_render_state.c
index 5026a62..50d010e 100644
--- a/drivers/gpu/drm/i915/i915_gem_render_state.c
+++ b/drivers/gpu/drm/i915/i915_gem_render_state.c
@@ -58,8 +58,8 @@ static int render_state_init(struct render_state *so, struct
drm_device *dev)
return -EINVAL;
so->obj = i915_gem_alloc_object(dev, 4096);
- if (so->obj == NULL)
- return -ENOMEM;
+ if (IS_ERR(so->obj))
+ return PTR_ERR(so->obj);
ret = i915_gem_obj_ggtt_pin(so->obj, 4096, 0);
if (ret)
diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c
b/drivers/gpu/drm/i915/i915_gem_stolen.c
index 5ec2190..d3e6813 100644
--- a/drivers/gpu/drm/i915/i915_gem_stolen.c
+++ b/drivers/gpu/drm/i915/i915_gem_stolen.c
@@ -406,6 +406,7 @@ i915_pages_create_for_stolen(struct drm_device *dev,
struct drm_i915_private *dev_priv = dev->dev_private;
struct sg_table *st;
struct scatterlist *sg;
+ int ret;
DRM_DEBUG_DRIVER("offset=0x%x, size=%d\n", offset, size);
BUG_ON(offset > dev_priv->gtt.stolen_size - size);
@@ -417,11 +418,12 @@ i915_pages_create_for_stolen(struct drm_device *dev,
st = kmalloc(sizeof(*st), GFP_KERNEL);
if (st == NULL)
- return NULL;
+ return ERR_PTR(-ENOMEM);
- if (sg_alloc_table(st, 1, GFP_KERNEL)) {
+ ret = sg_alloc_table(st, 1, GFP_KERNEL);
+ if (ret) {
kfree(st);
- return NULL;
+ return ERR_PTR(ret);
}
sg = st->sgl;
@@ -470,18 +472,21 @@ _i915_gem_object_create_stolen(struct drm_device *dev,
struct drm_mm_node *stolen)
{
struct drm_i915_gem_object *obj;
+ int ret = 0;
obj = i915_gem_object_alloc(dev);
if (obj == NULL)
- return NULL;
+ return ERR_PTR(-ENOMEM);
drm_gem_private_object_init(dev, &obj->base, stolen->size);
i915_gem_object_init(obj, &i915_gem_object_stolen_ops);
obj->pages = i915_pages_create_for_stolen(dev,
stolen->start, stolen->size);
- if (obj->pages == NULL)
+ if (IS_ERR(obj->pages)) {
+ ret = PTR_ERR(obj->pages);
goto cleanup;
+ }
i915_gem_object_pin_pages(obj);
obj->stolen = stolen;
@@ -493,7 +498,7 @@ _i915_gem_object_create_stolen(struct drm_device *dev,
cleanup:
i915_gem_object_free(obj);
- return NULL;
+ return ERR_PTR(ret);
}
struct drm_i915_gem_object *
@@ -505,29 +510,29 @@ i915_gem_object_create_stolen(struct drm_device *dev, u64
size)
int ret;
if (!drm_mm_initialized(&dev_priv->mm.stolen))
- return NULL;
+ return ERR_PTR(-ENODEV);
DRM_DEBUG_KMS("creating stolen object: size=%llx\n", size);
if (size == 0)
- return NULL;
+ return ERR_PTR(-EINVAL);
stolen = kzalloc(sizeof(*stolen), GFP_KERNEL);
if (!stolen)
- return NULL;
+ return ERR_PTR(-ENOMEM);
ret = i915_gem_stolen_insert_node(dev_priv, stolen, size, 4096);
if (ret) {
kfree(stolen);
- return NULL;
+ return ERR_PTR(ret);
}
obj = _i915_gem_object_create_stolen(dev, stolen);
- if (obj)
+ if (!IS_ERR(obj))
return obj;
i915_gem_stolen_remove_node(dev_priv, stolen);
kfree(stolen);
- return NULL;
+ return obj;
}
struct drm_i915_gem_object *
@@ -544,7 +549,7 @@ i915_gem_object_create_stolen_for_preallocated(struct
drm_device *dev,
int ret;
if (!drm_mm_initialized(&dev_priv->mm.stolen))
- return NULL;
+ return ERR_PTR(-ENODEV);
DRM_DEBUG_KMS("creating preallocated stolen object: stolen_offset=%x,
gtt_offset=%x, size=%x\n",
stolen_offset, gtt_offset, size);
@@ -552,11 +557,11 @@ i915_gem_object_create_stolen_for_preallocated(struct
drm_device *dev,
/* KISS and expect everything to be page-aligned */
if (WARN_ON(size == 0) || WARN_ON(size & 4095) ||
WARN_ON(stolen_offset & 4095))
- return NULL;
+ return ERR_PTR(-EINVAL);
stolen = kzalloc(sizeof(*stolen), GFP_KERNEL);
if (!stolen)
- return NULL;
+ return ERR_PTR(-ENOMEM);
stolen->start = stolen_offset;
stolen->size = size;
@@ -566,15 +571,15 @@ i915_gem_object_create_stolen_for_preallocated(struct
drm_device *dev,
if (ret) {
DRM_DEBUG_KMS("failed to allocate stolen space\n");
kfree(stolen);
- return NULL;
+ return ERR_PTR(ret);
}
obj = _i915_gem_object_create_stolen(dev, stolen);
- if (obj == NULL) {
+ if (IS_ERR(obj)) {
DRM_DEBUG_KMS("failed to allocate stolen object\n");
i915_gem_stolen_remove_node(dev_priv, stolen);
kfree(stolen);
- return NULL;
+ return obj;
}
/* Some objects just need physical mem from stolen space */
@@ -612,5 +617,5 @@ i915_gem_object_create_stolen_for_preallocated(struct
drm_device *dev,
err:
drm_gem_object_unreference(&obj->base);
- return NULL;
+ return ERR_PTR(ret);
}
diff --git a/drivers/gpu/drm/i915/i915_guc_submission.c
b/drivers/gpu/drm/i915/i915_guc_submission.c
index 792d0b9..3901698 100644
--- a/drivers/gpu/drm/i915/i915_guc_submission.c
+++ b/drivers/gpu/drm/i915/i915_guc_submission.c
@@ -646,8 +646,8 @@ static struct drm_i915_gem_object
*gem_allocate_guc_obj(struct drm_device *dev,
struct drm_i915_gem_object *obj;
obj = i915_gem_alloc_object(dev, size);
- if (!obj)
- return NULL;
+ if (IS_ERR(obj))
+ return obj;
if (i915_gem_object_get_pages(obj)) {
drm_gem_object_unreference(&obj->base);
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index 1847257..d08989a 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2514,7 +2514,7 @@ intel_alloc_initial_plane_obj(struct intel_crtc *crtc,
base_aligned,
base_aligned,
size_aligned);
- if (!obj)
+ if (IS_ERR(obj))
return false;
obj->tiling_mode = plane_config->tiling;
diff --git a/drivers/gpu/drm/i915/intel_fbdev.c
b/drivers/gpu/drm/i915/intel_fbdev.c
index 6532912..67de958 100644
--- a/drivers/gpu/drm/i915/intel_fbdev.c
+++ b/drivers/gpu/drm/i915/intel_fbdev.c
@@ -140,11 +140,11 @@ static int intelfb_alloc(struct drm_fb_helper *helper,
size = mode_cmd.pitches[0] * mode_cmd.height;
size = PAGE_ALIGN(size);
obj = i915_gem_object_create_stolen(dev, size);
- if (obj == NULL)
+ if (IS_ERR(obj))
obj = i915_gem_alloc_object(dev, size);
- if (!obj) {
+ if (IS_ERR(obj)) {
DRM_ERROR("failed to allocate framebuffer\n");
- ret = -ENOMEM;
+ ret = PTR_ERR(obj);
goto out;
}
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 256167b..d9bd9a1 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -1377,9 +1377,9 @@ static int lrc_setup_wa_ctx_obj(struct intel_engine_cs
*ring, u32 size)
int ret;
ring->wa_ctx.obj = i915_gem_alloc_object(ring->dev, PAGE_ALIGN(size));
- if (!ring->wa_ctx.obj) {
+ if (IS_ERR(ring->wa_ctx.obj)) {
DRM_DEBUG_DRIVER("alloc LRC WA ctx backing obj failed.\n");
- return -ENOMEM;
+ return PTR_ERR(ring->wa_ctx.obj);
}
ret = i915_gem_obj_ggtt_pin(ring->wa_ctx.obj, PAGE_SIZE, 0);
@@ -2459,9 +2459,9 @@ int intel_lr_context_deferred_alloc(struct intel_context
*ctx,
context_size += PAGE_SIZE * LRC_PPHWSP_PN;
ctx_obj = i915_gem_alloc_object(dev, context_size);
- if (!ctx_obj) {
+ if (IS_ERR(ctx_obj)) {
DRM_DEBUG_DRIVER("Alloc LRC backing obj failed.\n");
- return -ENOMEM;
+ return PTR_ERR(ctx_obj);
}
ringbuf = intel_engine_create_ringbuffer(ring, 4 * PAGE_SIZE);
diff --git a/drivers/gpu/drm/i915/intel_overlay.c
b/drivers/gpu/drm/i915/intel_overlay.c
index 4445426..bfb95a2 100644
--- a/drivers/gpu/drm/i915/intel_overlay.c
+++ b/drivers/gpu/drm/i915/intel_overlay.c
@@ -1392,9 +1392,9 @@ void intel_setup_overlay(struct drm_device *dev)
reg_bo = NULL;
if (!OVERLAY_NEEDS_PHYSICAL(dev))
reg_bo = i915_gem_object_create_stolen(dev, PAGE_SIZE);
- if (reg_bo == NULL)
+ if (IS_ERR_OR_NULL(reg_bo))
reg_bo = i915_gem_alloc_object(dev, PAGE_SIZE);
- if (reg_bo == NULL)
+ if (IS_ERR(reg_bo))
goto out_free;
overlay->reg_bo = reg_bo;
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index ab5ac5e..0d35d7f 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -5387,7 +5387,7 @@ static void valleyview_setup_pctx(struct drm_device *dev)
* memory, or any other relevant ranges.
*/
pctx = i915_gem_object_create_stolen(dev, pctx_size);
- if (!pctx) {
+ if (IS_ERR(pctx)) {
DRM_DEBUG("not enough stolen space for PCTX, disabling\n");
return;
}
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c
b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 16a4ead..a928602 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -676,9 +676,9 @@ intel_init_pipe_control(struct intel_engine_cs *ring)
WARN_ON(ring->scratch.obj);
ring->scratch.obj = i915_gem_alloc_object(ring->dev, 4096);
- if (ring->scratch.obj == NULL) {
+ if (IS_ERR(ring->scratch.obj)) {
DRM_ERROR("Failed to allocate seqno page\n");
- ret = -ENOMEM;
+ ret = PTR_ERR(ring->scratch.obj);
goto err;
}
@@ -1913,9 +1913,9 @@ static int init_status_page(struct intel_engine_cs *ring)
int ret;
obj = i915_gem_alloc_object(ring->dev, 4096);
- if (obj == NULL) {
+ if (IS_ERR(obj)) {
DRM_ERROR("Failed to allocate status page\n");
- return -ENOMEM;
+ return PTR_ERR(obj);
}
ret = i915_gem_object_set_cache_level(obj, I915_CACHE_LLC);
@@ -2020,10 +2020,10 @@ static int intel_alloc_ringbuffer_obj(struct drm_device
*dev,
obj = NULL;
if (!HAS_LLC(dev))
obj = i915_gem_object_create_stolen(dev, ringbuf->size);
- if (obj == NULL)
+ if (IS_ERR_OR_NULL(obj))
obj = i915_gem_alloc_object(dev, ringbuf->size);
- if (obj == NULL)
- return -ENOMEM;
+ if (IS_ERR(obj))
+ return PTR_ERR(obj);
/* mark ring buffers as read-only from GPU side by default */
obj->gt_ro = 1;
@@ -2607,7 +2607,7 @@ int intel_init_render_ring_buffer(struct drm_device *dev)
if (INTEL_INFO(dev)->gen >= 8) {
if (i915_semaphore_is_enabled(dev)) {
obj = i915_gem_alloc_object(dev, 4096);
- if (obj == NULL) {
+ if (IS_ERR(obj)) {
DRM_ERROR("Failed to allocate semaphore bo.
Disabling semaphores\n");
i915.semaphores = 0;
} else {
@@ -2713,9 +2713,9 @@ int intel_init_render_ring_buffer(struct drm_device *dev)
/* Workaround batchbuffer to combat CS tlb bug. */
if (HAS_BROKEN_CS_TLB(dev)) {
obj = i915_gem_alloc_object(dev, I830_WA_SIZE);
- if (obj == NULL) {
+ if (IS_ERR(obj)) {
DRM_ERROR("Failed to allocate batch bo\n");
- return -ENOMEM;
+ return PTR_ERR(obj);
}
ret = i915_gem_obj_ggtt_pin(obj, 0, 0);
--
1.9.1
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