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path: root/drivers/gpu/drm/i915/i915_gem.c
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Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem.c')
-rw-r--r--drivers/gpu/drm/i915/i915_gem.c394
1 files changed, 165 insertions, 229 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index eb98a7f55cfe..51a2b0c2a30d 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -58,6 +58,7 @@ static void i915_gem_free_object_tail(struct drm_i915_gem_object *obj);
static int i915_gem_inactive_shrink(struct shrinker *shrinker,
struct shrink_control *sc);
+static void i915_gem_object_truncate(struct drm_i915_gem_object *obj);
/* some bookkeeping */
static void i915_gem_info_add_obj(struct drm_i915_private *dev_priv,
@@ -258,73 +259,6 @@ static int i915_gem_object_needs_bit17_swizzle(struct drm_i915_gem_object *obj)
obj->tiling_mode != I915_TILING_NONE;
}
-static inline void
-slow_shmem_copy(struct page *dst_page,
- int dst_offset,
- struct page *src_page,
- int src_offset,
- int length)
-{
- char *dst_vaddr, *src_vaddr;
-
- dst_vaddr = kmap(dst_page);
- src_vaddr = kmap(src_page);
-
- memcpy(dst_vaddr + dst_offset, src_vaddr + src_offset, length);
-
- kunmap(src_page);
- kunmap(dst_page);
-}
-
-static inline void
-slow_shmem_bit17_copy(struct page *gpu_page,
- int gpu_offset,
- struct page *cpu_page,
- int cpu_offset,
- int length,
- int is_read)
-{
- char *gpu_vaddr, *cpu_vaddr;
-
- /* Use the unswizzled path if this page isn't affected. */
- if ((page_to_phys(gpu_page) & (1 << 17)) == 0) {
- if (is_read)
- return slow_shmem_copy(cpu_page, cpu_offset,
- gpu_page, gpu_offset, length);
- else
- return slow_shmem_copy(gpu_page, gpu_offset,
- cpu_page, cpu_offset, length);
- }
-
- gpu_vaddr = kmap(gpu_page);
- cpu_vaddr = kmap(cpu_page);
-
- /* Copy the data, XORing A6 with A17 (1). The user already knows he's
- * XORing with the other bits (A9 for Y, A9 and A10 for X)
- */
- while (length > 0) {
- int cacheline_end = ALIGN(gpu_offset + 1, 64);
- int this_length = min(cacheline_end - gpu_offset, length);
- int swizzled_gpu_offset = gpu_offset ^ 64;
-
- if (is_read) {
- memcpy(cpu_vaddr + cpu_offset,
- gpu_vaddr + swizzled_gpu_offset,
- this_length);
- } else {
- memcpy(gpu_vaddr + swizzled_gpu_offset,
- cpu_vaddr + cpu_offset,
- this_length);
- }
- cpu_offset += this_length;
- gpu_offset += this_length;
- length -= this_length;
- }
-
- kunmap(cpu_page);
- kunmap(gpu_page);
-}
-
/**
* This is the fast shmem pread path, which attempts to copy_from_user directly
* from the backing pages of the object to the user's address space. On a
@@ -385,6 +319,58 @@ i915_gem_shmem_pread_fast(struct drm_device *dev,
return 0;
}
+static inline int
+__copy_to_user_swizzled(char __user *cpu_vaddr,
+ const char *gpu_vaddr, int gpu_offset,
+ int length)
+{
+ int ret, cpu_offset = 0;
+
+ while (length > 0) {
+ int cacheline_end = ALIGN(gpu_offset + 1, 64);
+ int this_length = min(cacheline_end - gpu_offset, length);
+ int swizzled_gpu_offset = gpu_offset ^ 64;
+
+ ret = __copy_to_user(cpu_vaddr + cpu_offset,
+ gpu_vaddr + swizzled_gpu_offset,
+ this_length);
+ if (ret)
+ return ret + length;
+
+ cpu_offset += this_length;
+ gpu_offset += this_length;
+ length -= this_length;
+ }
+
+ return 0;
+}
+
+static inline int
+__copy_from_user_swizzled(char __user *gpu_vaddr, int gpu_offset,
+ const char *cpu_vaddr,
+ int length)
+{
+ int ret, cpu_offset = 0;
+
+ while (length > 0) {
+ int cacheline_end = ALIGN(gpu_offset + 1, 64);
+ int this_length = min(cacheline_end - gpu_offset, length);
+ int swizzled_gpu_offset = gpu_offset ^ 64;
+
+ ret = __copy_from_user(gpu_vaddr + swizzled_gpu_offset,
+ cpu_vaddr + cpu_offset,
+ this_length);
+ if (ret)
+ return ret + length;
+
+ cpu_offset += this_length;
+ gpu_offset += this_length;
+ length -= this_length;
+ }
+
+ return 0;
+}
+
/**
* This is the fallback shmem pread path, which allocates temporary storage
* in kernel space to copy_to_user into outside of the struct_mutex, so we
@@ -398,72 +384,34 @@ i915_gem_shmem_pread_slow(struct drm_device *dev,
struct drm_file *file)
{
struct address_space *mapping = obj->base.filp->f_path.dentry->d_inode->i_mapping;
- struct mm_struct *mm = current->mm;
- struct page **user_pages;
+ char __user *user_data;
ssize_t remain;
- loff_t offset, pinned_pages, i;
- loff_t first_data_page, last_data_page, num_pages;
- int shmem_page_offset;
- int data_page_index, data_page_offset;
- int page_length;
- int ret;
- uint64_t data_ptr = args->data_ptr;
- int do_bit17_swizzling;
+ loff_t offset;
+ int shmem_page_offset, page_length, ret;
+ int obj_do_bit17_swizzling, page_do_bit17_swizzling;
+ user_data = (char __user *) (uintptr_t) args->data_ptr;
remain = args->size;
- /* Pin the user pages containing the data. We can't fault while
- * holding the struct mutex, yet we want to hold it while
- * dereferencing the user data.
- */
- first_data_page = data_ptr / PAGE_SIZE;
- last_data_page = (data_ptr + args->size - 1) / PAGE_SIZE;
- num_pages = last_data_page - first_data_page + 1;
+ obj_do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj);
- user_pages = drm_malloc_ab(num_pages, sizeof(struct page *));
- if (user_pages == NULL)
- return -ENOMEM;
+ offset = args->offset;
mutex_unlock(&dev->struct_mutex);
- down_read(&mm->mmap_sem);
- pinned_pages = get_user_pages(current, mm, (uintptr_t)args->data_ptr,
- num_pages, 1, 0, user_pages, NULL);
- up_read(&mm->mmap_sem);
- mutex_lock(&dev->struct_mutex);
- if (pinned_pages < num_pages) {
- ret = -EFAULT;
- goto out;
- }
-
- ret = i915_gem_object_set_cpu_read_domain_range(obj,
- args->offset,
- args->size);
- if (ret)
- goto out;
-
- do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj);
-
- offset = args->offset;
while (remain > 0) {
struct page *page;
+ char *vaddr;
/* Operation in this page
*
* shmem_page_offset = offset within page in shmem file
- * data_page_index = page number in get_user_pages return
- * data_page_offset = offset with data_page_index page.
* page_length = bytes to copy for this page
*/
shmem_page_offset = offset_in_page(offset);
- data_page_index = data_ptr / PAGE_SIZE - first_data_page;
- data_page_offset = offset_in_page(data_ptr);
-
page_length = remain;
if ((shmem_page_offset + page_length) > PAGE_SIZE)
page_length = PAGE_SIZE - shmem_page_offset;
- if ((data_page_offset + page_length) > PAGE_SIZE)
- page_length = PAGE_SIZE - data_page_offset;
page = shmem_read_mapping_page(mapping, offset >> PAGE_SHIFT);
if (IS_ERR(page)) {
@@ -471,36 +419,38 @@ i915_gem_shmem_pread_slow(struct drm_device *dev,
goto out;
}
- if (do_bit17_swizzling) {
- slow_shmem_bit17_copy(page,
- shmem_page_offset,
- user_pages[data_page_index],
- data_page_offset,
- page_length,
- 1);
- } else {
- slow_shmem_copy(user_pages[data_page_index],
- data_page_offset,
- page,
- shmem_page_offset,
- page_length);
- }
+ page_do_bit17_swizzling = obj_do_bit17_swizzling &&
+ (page_to_phys(page) & (1 << 17)) != 0;
+
+ vaddr = kmap(page);
+ if (page_do_bit17_swizzling)
+ ret = __copy_to_user_swizzled(user_data,
+ vaddr, shmem_page_offset,
+ page_length);
+ else
+ ret = __copy_to_user(user_data,
+ vaddr + shmem_page_offset,
+ page_length);
+ kunmap(page);
mark_page_accessed(page);
page_cache_release(page);
+ if (ret) {
+ ret = -EFAULT;
+ goto out;
+ }
+
remain -= page_length;
- data_ptr += page_length;
+ user_data += page_length;
offset += page_length;
}
out:
- for (i = 0; i < pinned_pages; i++) {
- SetPageDirty(user_pages[i]);
- mark_page_accessed(user_pages[i]);
- page_cache_release(user_pages[i]);
- }
- drm_free_large(user_pages);
+ mutex_lock(&dev->struct_mutex);
+ /* Fixup: Kill any reinstated backing storage pages */
+ if (obj->madv == __I915_MADV_PURGED)
+ i915_gem_object_truncate(obj);
return ret;
}
@@ -841,71 +791,36 @@ i915_gem_shmem_pwrite_slow(struct drm_device *dev,
struct drm_file *file)
{
struct address_space *mapping = obj->base.filp->f_path.dentry->d_inode->i_mapping;
- struct mm_struct *mm = current->mm;
- struct page **user_pages;
ssize_t remain;
- loff_t offset, pinned_pages, i;
- loff_t first_data_page, last_data_page, num_pages;
- int shmem_page_offset;
- int data_page_index, data_page_offset;
- int page_length;
- int ret;
- uint64_t data_ptr = args->data_ptr;
- int do_bit17_swizzling;
+ loff_t offset;
+ char __user *user_data;
+ int shmem_page_offset, page_length, ret;
+ int obj_do_bit17_swizzling, page_do_bit17_swizzling;
+ user_data = (char __user *) (uintptr_t) args->data_ptr;
remain = args->size;
- /* Pin the user pages containing the data. We can't fault while
- * holding the struct mutex, and all of the pwrite implementations
- * want to hold it while dereferencing the user data.
- */
- first_data_page = data_ptr / PAGE_SIZE;
- last_data_page = (data_ptr + args->size - 1) / PAGE_SIZE;
- num_pages = last_data_page - first_data_page + 1;
-
- user_pages = drm_malloc_ab(num_pages, sizeof(struct page *));
- if (user_pages == NULL)
- return -ENOMEM;
-
- mutex_unlock(&dev->struct_mutex);
- down_read(&mm->mmap_sem);
- pinned_pages = get_user_pages(current, mm, (uintptr_t)args->data_ptr,
- num_pages, 0, 0, user_pages, NULL);
- up_read(&mm->mmap_sem);
- mutex_lock(&dev->struct_mutex);
- if (pinned_pages < num_pages) {
- ret = -EFAULT;
- goto out;
- }
-
- ret = i915_gem_object_set_to_cpu_domain(obj, 1);
- if (ret)
- goto out;
-
- do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj);
+ obj_do_bit17_swizzling = i915_gem_object_needs_bit17_swizzle(obj);
offset = args->offset;
obj->dirty = 1;
+ mutex_unlock(&dev->struct_mutex);
+
while (remain > 0) {
struct page *page;
+ char *vaddr;
/* Operation in this page
*
* shmem_page_offset = offset within page in shmem file
- * data_page_index = page number in get_user_pages return
- * data_page_offset = offset with data_page_index page.
* page_length = bytes to copy for this page
*/
shmem_page_offset = offset_in_page(offset);
- data_page_index = data_ptr / PAGE_SIZE - first_data_page;
- data_page_offset = offset_in_page(data_ptr);
page_length = remain;
if ((shmem_page_offset + page_length) > PAGE_SIZE)
page_length = PAGE_SIZE - shmem_page_offset;
- if ((data_page_offset + page_length) > PAGE_SIZE)
- page_length = PAGE_SIZE - data_page_offset;
page = shmem_read_mapping_page(mapping, offset >> PAGE_SHIFT);
if (IS_ERR(page)) {
@@ -913,34 +828,45 @@ i915_gem_shmem_pwrite_slow(struct drm_device *dev,
goto out;
}
- if (do_bit17_swizzling) {
- slow_shmem_bit17_copy(page,
- shmem_page_offset,
- user_pages[data_page_index],
- data_page_offset,
- page_length,
- 0);
- } else {
- slow_shmem_copy(page,
- shmem_page_offset,
- user_pages[data_page_index],
- data_page_offset,
- page_length);
- }
+ page_do_bit17_swizzling = obj_do_bit17_swizzling &&
+ (page_to_phys(page) & (1 << 17)) != 0;
+
+ vaddr = kmap(page);
+ if (page_do_bit17_swizzling)
+ ret = __copy_from_user_swizzled(vaddr, shmem_page_offset,
+ user_data,
+ page_length);
+ else
+ ret = __copy_from_user(vaddr + shmem_page_offset,
+ user_data,
+ page_length);
+ kunmap(page);
set_page_dirty(page);
mark_page_accessed(page);
page_cache_release(page);
+ if (ret) {
+ ret = -EFAULT;
+ goto out;
+ }
+
remain -= page_length;
- data_ptr += page_length;
+ user_data += page_length;
offset += page_length;
}
out:
- for (i = 0; i < pinned_pages; i++)
- page_cache_release(user_pages[i]);
- drm_free_large(user_pages);
+ mutex_lock(&dev->struct_mutex);
+ /* Fixup: Kill any reinstated backing storage pages */
+ if (obj->madv == __I915_MADV_PURGED)
+ i915_gem_object_truncate(obj);
+ /* and flush dirty cachelines in case the object isn't in the cpu write
+ * domain anymore. */
+ if (obj->base.write_domain != I915_GEM_DOMAIN_CPU) {
+ i915_gem_clflush_object(obj);
+ intel_gtt_chipset_flush();
+ }
return ret;
}
@@ -996,10 +922,13 @@ i915_gem_pwrite_ioctl(struct drm_device *dev, void *data,
* pread/pwrite currently are reading and writing from the CPU
* perspective, requiring manual detiling by the client.
*/
- if (obj->phys_obj)
+ if (obj->phys_obj) {
ret = i915_gem_phys_pwrite(dev, obj, args, file);
- else if (obj->gtt_space &&
- obj->base.write_domain != I915_GEM_DOMAIN_CPU) {
+ goto out;
+ }
+
+ if (obj->gtt_space &&
+ obj->base.write_domain != I915_GEM_DOMAIN_CPU) {
ret = i915_gem_object_pin(obj, 0, true);
if (ret)
goto out;
@@ -1018,18 +947,24 @@ i915_gem_pwrite_ioctl(struct drm_device *dev, void *data,
out_unpin:
i915_gem_object_unpin(obj);
- } else {
- ret = i915_gem_object_set_to_cpu_domain(obj, 1);
- if (ret)
- goto out;
- ret = -EFAULT;
- if (!i915_gem_object_needs_bit17_swizzle(obj))
- ret = i915_gem_shmem_pwrite_fast(dev, obj, args, file);
- if (ret == -EFAULT)
- ret = i915_gem_shmem_pwrite_slow(dev, obj, args, file);
+ if (ret != -EFAULT)
+ goto out;
+ /* Fall through to the shmfs paths because the gtt paths might
+ * fail with non-page-backed user pointers (e.g. gtt mappings
+ * when moving data between textures). */
}
+ ret = i915_gem_object_set_to_cpu_domain(obj, 1);
+ if (ret)
+ goto out;
+
+ ret = -EFAULT;
+ if (!i915_gem_object_needs_bit17_swizzle(obj))
+ ret = i915_gem_shmem_pwrite_fast(dev, obj, args, file);
+ if (ret == -EFAULT)
+ ret = i915_gem_shmem_pwrite_slow(dev, obj, args, file);
+
out:
drm_gem_object_unreference(&obj->base);
unlock:
@@ -1141,7 +1076,6 @@ int
i915_gem_mmap_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
- struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_i915_gem_mmap *args = data;
struct drm_gem_object *obj;
unsigned long addr;
@@ -1153,11 +1087,6 @@ i915_gem_mmap_ioctl(struct drm_device *dev, void *data,
if (obj == NULL)
return -ENOENT;
- if (obj->size > dev_priv->mm.gtt_mappable_end) {
- drm_gem_object_unreference_unlocked(obj);
- return -E2BIG;
- }
-
down_write(&current->mm->mmap_sem);
addr = do_mmap(obj->filp, 0, args->size,
PROT_READ | PROT_WRITE, MAP_SHARED,
@@ -1943,7 +1872,8 @@ i915_gem_retire_work_handler(struct work_struct *work)
*/
int
i915_wait_request(struct intel_ring_buffer *ring,
- uint32_t seqno)
+ uint32_t seqno,
+ bool do_retire)
{
drm_i915_private_t *dev_priv = ring->dev->dev_private;
u32 ier;
@@ -2027,7 +1957,7 @@ i915_wait_request(struct intel_ring_buffer *ring,
* buffer to have made it to the inactive list, and we would need
* a separate wait queue to handle that.
*/
- if (ret == 0)
+ if (ret == 0 && do_retire)
i915_gem_retire_requests_ring(ring);
return ret;
@@ -2051,7 +1981,8 @@ i915_gem_object_wait_rendering(struct drm_i915_gem_object *obj)
* it.
*/
if (obj->active) {
- ret = i915_wait_request(obj->ring, obj->last_rendering_seqno);
+ ret = i915_wait_request(obj->ring, obj->last_rendering_seqno,
+ true);
if (ret)
return ret;
}
@@ -2172,7 +2103,7 @@ i915_gem_flush_ring(struct intel_ring_buffer *ring,
return 0;
}
-static int i915_ring_idle(struct intel_ring_buffer *ring)
+static int i915_ring_idle(struct intel_ring_buffer *ring, bool do_retire)
{
int ret;
@@ -2186,18 +2117,18 @@ static int i915_ring_idle(struct intel_ring_buffer *ring)
return ret;
}
- return i915_wait_request(ring, i915_gem_next_request_seqno(ring));
+ return i915_wait_request(ring, i915_gem_next_request_seqno(ring),
+ do_retire);
}
-int
-i915_gpu_idle(struct drm_device *dev)
+int i915_gpu_idle(struct drm_device *dev, bool do_retire)
{
drm_i915_private_t *dev_priv = dev->dev_private;
int ret, i;
/* Flush everything onto the inactive list. */
for (i = 0; i < I915_NUM_RINGS; i++) {
- ret = i915_ring_idle(&dev_priv->ring[i]);
+ ret = i915_ring_idle(&dev_priv->ring[i], do_retire);
if (ret)
return ret;
}
@@ -2400,7 +2331,8 @@ i915_gem_object_flush_fence(struct drm_i915_gem_object *obj,
if (!ring_passed_seqno(obj->last_fenced_ring,
obj->last_fenced_seqno)) {
ret = i915_wait_request(obj->last_fenced_ring,
- obj->last_fenced_seqno);
+ obj->last_fenced_seqno,
+ true);
if (ret)
return ret;
}
@@ -2432,6 +2364,8 @@ i915_gem_object_put_fence(struct drm_i915_gem_object *obj)
if (obj->fence_reg != I915_FENCE_REG_NONE) {
struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
+
+ WARN_ON(dev_priv->fence_regs[obj->fence_reg].pin_count);
i915_gem_clear_fence_reg(obj->base.dev,
&dev_priv->fence_regs[obj->fence_reg]);
@@ -2456,7 +2390,7 @@ i915_find_fence_reg(struct drm_device *dev,
if (!reg->obj)
return reg;
- if (!reg->obj->pin_count)
+ if (!reg->pin_count)
avail = reg;
}
@@ -2466,7 +2400,7 @@ i915_find_fence_reg(struct drm_device *dev,
/* None available, try to steal one or wait for a user to finish */
avail = first = NULL;
list_for_each_entry(reg, &dev_priv->mm.fence_list, lru_list) {
- if (reg->obj->pin_count)
+ if (reg->pin_count)
continue;
if (first == NULL)
@@ -2541,7 +2475,8 @@ i915_gem_object_get_fence(struct drm_i915_gem_object *obj,
if (!ring_passed_seqno(obj->last_fenced_ring,
reg->setup_seqno)) {
ret = i915_wait_request(obj->last_fenced_ring,
- reg->setup_seqno);
+ reg->setup_seqno,
+ true);
if (ret)
return ret;
}
@@ -2560,7 +2495,7 @@ i915_gem_object_get_fence(struct drm_i915_gem_object *obj,
reg = i915_find_fence_reg(dev, pipelined);
if (reg == NULL)
- return -ENOSPC;
+ return -EDEADLK;
ret = i915_gem_object_flush_fence(obj, pipelined);
if (ret)
@@ -2660,6 +2595,7 @@ i915_gem_clear_fence_reg(struct drm_device *dev,
list_del_init(&reg->lru_list);
reg->obj = NULL;
reg->setup_seqno = 0;
+ reg->pin_count = 0;
}
/**
@@ -3710,7 +3646,7 @@ i915_gem_idle(struct drm_device *dev)
return 0;
}
- ret = i915_gpu_idle(dev);
+ ret = i915_gpu_idle(dev, true);
if (ret) {
mutex_unlock(&dev->struct_mutex);
return ret;
@@ -4201,7 +4137,7 @@ rescan:
* This has a dramatic impact to reduce the number of
* OOM-killer events whilst running the GPU aggressively.
*/
- if (i915_gpu_idle(dev) == 0)
+ if (i915_gpu_idle(dev, true) == 0)
goto rescan;
}
mutex_unlock(&dev->struct_mutex);
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