[PATCH] drm/amd/amdgpu: Convert comments for amdgpu_ttm.c
Tom St Denis
tom.stdenis at amd.com
Fri May 18 16:22:40 UTC 2018
We're moving to Sphinx style documentation. Conver the comments
to that format. Also document some new content.
Signed-off-by: Tom St Denis <tom.stdenis at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 254 +++++++++++++++++++++++---------
1 file changed, 185 insertions(+), 69 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 57d4da6bdbe4..367d5bc2630f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -65,8 +65,9 @@ static void amdgpu_ttm_debugfs_fini(struct amdgpu_device *adev);
*/
/**
- * amdgpu_ttm_mem_global_init - Initialize and acquire reference to
- * memory object
+ * DOC: amdgpu_ttm_mem_global_init
+ *
+ * Initialize and acquire reference to memory object
*
* @ref: Object for initialization.
*
@@ -79,7 +80,9 @@ static int amdgpu_ttm_mem_global_init(struct drm_global_reference *ref)
}
/**
- * amdgpu_ttm_mem_global_release - Drop reference to a memory object
+ * DOC: amdgpu_ttm_mem_global_release
+ *
+ * Drop reference to a memory object
*
* @ref: Object being removed
*
@@ -92,8 +95,9 @@ static void amdgpu_ttm_mem_global_release(struct drm_global_reference *ref)
}
/**
- * amdgpu_ttm_global_init - Initialize global TTM memory reference
- * structures.
+ * DOC: amdgpu_ttm_global_init
+ *
+ * Initialize global TTM memory reference structures.
*
* @adev: AMDGPU device for which the global structures need to be
* registered.
@@ -177,8 +181,9 @@ static int amdgpu_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
}
/**
- * amdgpu_init_mem_type - Initialize a memory manager for a specific
- * type of memory request.
+ * DOC: amdgpu_init_mem_type
+ *
+ * Initialize a memory manager for a specific type of memory request.
*
* @bdev: The TTM BO device object (contains a reference to
* amdgpu_device)
@@ -237,12 +242,14 @@ static int amdgpu_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
}
/**
- * amdgpu_evict_flags - Compute placement flags
+ * DOC: amdgpu_evict_flags
+ *
+ * Compute placement flags
*
* @bo: The buffer object to evict
* @placement: Possible destination(s) for evicted BO
*
- * Fill in placement data when ttm_bo_evict() is called
+ * Fill in placement data when ttm_bo_evict() is called.
*/
static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
struct ttm_placement *placement)
@@ -305,7 +312,9 @@ static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
}
/**
- * amdgpu_verify_access - Verify access for a mmap call
+ * DOC: amdgpu_verify_access
+ *
+ * Verify access for a mmap call
*
* @bo: The buffer object to map
* @filp: The file pointer from the process performing the mmap
@@ -331,7 +340,9 @@ static int amdgpu_verify_access(struct ttm_buffer_object *bo, struct file *filp)
}
/**
- * amdgpu_move_null - Register memory for a buffer object
+ * DOC: amdgpu_move_null
+ *
+ * Register memory for a buffer object
*
* @bo: The bo to assign the memory to
* @new_mem: The memory to be assigned.
@@ -350,8 +361,9 @@ static void amdgpu_move_null(struct ttm_buffer_object *bo,
}
/**
- * amdgpu_mm_node_addr - Compute the GPU relative offset of a GTT
- * buffer.
+ * DOC: amdgpu_mm_node_addr
+ *
+ * Compute the GPU relative offset of a GTT buffer.
*/
static uint64_t amdgpu_mm_node_addr(struct ttm_buffer_object *bo,
struct drm_mm_node *mm_node,
@@ -367,10 +379,10 @@ static uint64_t amdgpu_mm_node_addr(struct ttm_buffer_object *bo,
}
/**
- * amdgpu_find_mm_node - Helper function finds the drm_mm_node
- * corresponding to @offset. It also modifies
- * the offset to be within the drm_mm_node
- * returned
+ * DOC: amdgpu_find_mm_node
+ *
+ * Helper function finds the drm_mm_node corresponding to @offset. It
+ * also modifies the offset to be within the drm_mm_node returned.
*/
static struct drm_mm_node *amdgpu_find_mm_node(struct ttm_mem_reg *mem,
unsigned long *offset)
@@ -385,7 +397,9 @@ static struct drm_mm_node *amdgpu_find_mm_node(struct ttm_mem_reg *mem,
}
/**
- * amdgpu_copy_ttm_mem_to_mem - Helper function for copy
+ * DOC: amdgpu_copy_ttm_mem_to_mem
+ *
+ * Helper function for copy
*
* The function copies @size bytes from {src->mem + src->offset} to
* {dst->mem + dst->offset}. src->bo and dst->bo could be same BO for a
@@ -510,7 +524,9 @@ int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device *adev,
}
/**
- * amdgpu_move_blit - Copy an entire buffer to another buffer
+ * DOC: amdgpu_move_blit
+ *
+ * Copy an entire buffer to another buffer
*
* This is a helper called by amdgpu_bo_move() and
* amdgpu_move_vram_ram() to help move buffers to and from VRAM.
@@ -550,7 +566,9 @@ static int amdgpu_move_blit(struct ttm_buffer_object *bo,
}
/**
- * amdgpu_move_vram_ram - Copy VRAM buffer to RAM buffer
+ * DOC: amdgpu_move_vram_ram
+ *
+ * Copy VRAM buffer to RAM buffer
*
* Called by amdgpu_bo_move().
*/
@@ -608,7 +626,9 @@ static int amdgpu_move_vram_ram(struct ttm_buffer_object *bo, bool evict,
}
/**
- * amdgpu_move_ram_vram - Copy buffer from RAM to VRAM
+ * DOC: amdgpu_move_ram_vram
+ *
+ * Copy buffer from RAM to VRAM
*
* Called by amdgpu_bo_move().
*/
@@ -657,7 +677,9 @@ static int amdgpu_move_ram_vram(struct ttm_buffer_object *bo, bool evict,
}
/**
- * amdgpu_bo_move - Move a buffer object to a new memory location
+ * DOC: amdgpu_bo_move
+ *
+ * Move a buffer object to a new memory location
*
* Called by ttm_bo_handle_move_mem()
*/
@@ -727,7 +749,9 @@ static int amdgpu_bo_move(struct ttm_buffer_object *bo, bool evict,
}
/**
- * amdgpu_ttm_io_mem_reserve - Reserve a block of memory during a fault
+ * DOC: amdgpu_ttm_io_mem_reserve
+ *
+ * Reserve a block of memory during a fault
*
* Called by ttm_mem_io_reserve() ultimately via ttm_bo_vm_fault()
*/
@@ -809,8 +833,9 @@ struct amdgpu_ttm_tt {
};
/**
- * amdgpu_ttm_tt_get_user_pages - Pin pages of memory pointed to
- * by a USERPTR pointer to memory
+ * DOC: amdgpu_ttm_tt_get_user_pages
+ *
+ * Grab a reference to pages of memory pointed to by a USERPTR pointer
*
* Called by amdgpu_gem_userptr_ioctl() and amdgpu_cs_parser_bos().
* This provides a wrapper around the get_user_pages() call to provide
@@ -876,8 +901,9 @@ int amdgpu_ttm_tt_get_user_pages(struct ttm_tt *ttm, struct page **pages)
}
/**
- * amdgpu_ttm_tt_set_user_pages - Copy pages in, putting old pages
- * as necessary.
+ * DOC: amdgpu_ttm_tt_set_user_pages
+ *
+ * Copy pages in, putting old pages as necessary.
*
* Called by amdgpu_cs_list_validate(). This creates the page list
* that backs user memory and will ultimately be mapped into the device
@@ -898,7 +924,9 @@ void amdgpu_ttm_tt_set_user_pages(struct ttm_tt *ttm, struct page **pages)
}
/**
- * amdgpu_ttm_tt_mark_user_page - Mark pages as dirty
+ * DOC: amdgpu_ttm_tt_mark_user_page
+ *
+ * Mark pages as dirty
*
* Called while unpinning userptr pages
*/
@@ -921,8 +949,9 @@ void amdgpu_ttm_tt_mark_user_pages(struct ttm_tt *ttm)
}
/**
- * amdgpu_ttm_tt_pin_userptr - prepare the sg table with the
- * user pages
+ * DOC: amdgpu_ttm_tt_pin_userptr
+ *
+ * prepare the sg table with the user pages
*
* Called by amdgpu_ttm_backend_bind()
**/
@@ -962,7 +991,9 @@ static int amdgpu_ttm_tt_pin_userptr(struct ttm_tt *ttm)
}
/**
- * amdgpu_ttm_tt_unpin_userptr - Unpin and unmap userptr pages
+ * DOC: amdgpu_ttm_tt_unpin_userptr
+ *
+ * Unpin and unmap userptr pages
*/
static void amdgpu_ttm_tt_unpin_userptr(struct ttm_tt *ttm)
{
@@ -986,6 +1017,12 @@ static void amdgpu_ttm_tt_unpin_userptr(struct ttm_tt *ttm)
sg_free_table(ttm->sg);
}
+/**
+ * DOC: amdgpu_ttm_gart_bind
+ *
+ * Wrapper for amdgpu_gart_bind() to handle GFX9 specific page
+ * mappings.
+ */
int amdgpu_ttm_gart_bind(struct amdgpu_device *adev,
struct ttm_buffer_object *tbo,
uint64_t flags)
@@ -995,6 +1032,10 @@ int amdgpu_ttm_gart_bind(struct amdgpu_device *adev,
struct amdgpu_ttm_tt *gtt = (void *)ttm;
int r;
+ /* for a MQD buffer object map the first
+ * page as is. For all subsequent pages map them as
+ * an MTYPE of NC.
+ */
if (abo->flags & AMDGPU_GEM_CREATE_MQD_GFX9) {
uint64_t page_idx = 1;
@@ -1013,6 +1054,7 @@ int amdgpu_ttm_gart_bind(struct amdgpu_device *adev,
&ttm->pages[page_idx],
&(gtt->ttm.dma_address[page_idx]), flags);
} else {
+ /* fall back to a regular gart binding */
r = amdgpu_gart_bind(adev, gtt->offset, ttm->num_pages,
ttm->pages, gtt->ttm.dma_address, flags);
}
@@ -1026,7 +1068,9 @@ int amdgpu_ttm_gart_bind(struct amdgpu_device *adev,
}
/**
- * amdgpu_ttm_backend_bind - Bind GTT memory
+ * DOC: amdgpu_ttm_backend_bind
+ *
+ * Bind GTT memory
*
* Called by ttm_tt_bind() on behalf of ttm_bo_handle_move_mem().
* This handles binding GTT memory to the device address space.
@@ -1076,7 +1120,9 @@ static int amdgpu_ttm_backend_bind(struct ttm_tt *ttm,
}
/**
- * amdgpu_ttm_alloc_gart - Allocate GART memory for buffer object
+ * DOC: amdgpu_ttm_alloc_gart
+ *
+ * Allocate GART memory for buffer object
*/
int amdgpu_ttm_alloc_gart(struct ttm_buffer_object *bo)
{
@@ -1129,7 +1175,9 @@ int amdgpu_ttm_alloc_gart(struct ttm_buffer_object *bo)
}
/**
- * amdgpu_ttm_recover_gart - Rebind GTT pages
+ * DOC: amdgpu_ttm_recover_gart
+ *
+ * Rebind GTT pages
*
* Called by amdgpu_gtt_mgr_recover() from amdgpu_device_reset() to
* rebind GTT pages during a GPU reset.
@@ -1150,7 +1198,9 @@ int amdgpu_ttm_recover_gart(struct ttm_buffer_object *tbo)
}
/**
- * amdgpu_ttm_backend_unbind - Unbind GTT mapped pages
+ * DOC: amdgpu_ttm_backend_unbind
+ *
+ * Unbind GTT mapped pages
*
* Called by ttm_tt_unbind() on behalf of ttm_bo_move_ttm() and
* ttm_tt_destroy().
@@ -1191,7 +1241,9 @@ static struct ttm_backend_func amdgpu_backend_func = {
};
/**
- * amdgpu_ttm_tt_create - Create a ttm_tt object for a given BO
+ * DOC: amdgpu_ttm_tt_create
+ *
+ * Create a ttm_tt object for a given BO
*
* @bo: The buffer object to create a GTT ttm_tt object around
*
@@ -1220,7 +1272,9 @@ static struct ttm_tt *amdgpu_ttm_tt_create(struct ttm_buffer_object *bo,
}
/**
- * amdgpu_ttm_tt_populate - Map GTT pages visible to the device
+ * DOC: amdgpu_ttm_tt_populate
+ *
+ * Map GTT pages visible to the device
*
* Map the pages of a ttm_tt object to an address space visible
* to the underlying device.
@@ -1263,7 +1317,9 @@ static int amdgpu_ttm_tt_populate(struct ttm_tt *ttm,
}
/**
- * amdgpu_ttm_tt_unpopulate - unmap GTT pages and unpopulate page arrays
+ * DOC: amdgpu_ttm_tt_unpopulate
+ *
+ * Unmap GTT pages and unpopulate page arrays
*
* Unmaps pages of a ttm_tt object from the device address space and
* unpopulates the page array backing it.
@@ -1298,8 +1354,9 @@ static void amdgpu_ttm_tt_unpopulate(struct ttm_tt *ttm)
}
/**
- * amdgpu_ttm_tt_set_userptr - Initialize userptr GTT ttm_tt
- * for the current task
+ * DOC: amdgpu_ttm_tt_set_userptr
+ *
+ * Initialize userptr GTT ttm_tt for the current task
*
* @ttm: The ttm_tt object to bind this userptr object to
* @addr: The address in the current tasks VM space to use
@@ -1328,7 +1385,9 @@ int amdgpu_ttm_tt_set_userptr(struct ttm_tt *ttm, uint64_t addr,
}
/**
- * amdgpu_ttm_tt_get_usermm - Return memory manager for ttm_tt object
+ * DOC: amdgpu_ttm_tt_get_usermm
+ *
+ * Return memory manager for ttm_tt object
*/
struct mm_struct *amdgpu_ttm_tt_get_usermm(struct ttm_tt *ttm)
{
@@ -1341,9 +1400,10 @@ struct mm_struct *amdgpu_ttm_tt_get_usermm(struct ttm_tt *ttm)
}
/**
- * amdgpu_ttm_tt_affect_userptr - Determine if a ttm_tt object lays
- * inside an address range for the
- * current task.
+ * DOC: amdgpu_ttm_tt_affect_userptr
+ *
+ * Determine if a ttm_tt object lays inside an address range for the
+ * current task.
*
*/
bool amdgpu_ttm_tt_affect_userptr(struct ttm_tt *ttm, unsigned long start,
@@ -1381,8 +1441,9 @@ bool amdgpu_ttm_tt_affect_userptr(struct ttm_tt *ttm, unsigned long start,
}
/**
- * amdgpu_ttm_tt_userptr_invalidated - Has the ttm_tt object been
- * invalidated?
+ * DOC: amdgpu_ttm_tt_userptr_invalidated
+ *
+ * Has the ttm_tt object been invalidated?
*/
bool amdgpu_ttm_tt_userptr_invalidated(struct ttm_tt *ttm,
int *last_invalidated)
@@ -1395,10 +1456,10 @@ bool amdgpu_ttm_tt_userptr_invalidated(struct ttm_tt *ttm,
}
/**
- * amdgpu_ttm_tt_userptr_needs_pages - Have the pages backing this
- * ttm_tt object been invalidated
- * since the last time they've
- * been set?
+ * DOC: amdgpu_ttm_tt_userptr_needs_pages
+ *
+ * Have the pages backing this ttm_tt object been invalidated
+ * since the last time they've been set?
*/
bool amdgpu_ttm_tt_userptr_needs_pages(struct ttm_tt *ttm)
{
@@ -1411,7 +1472,9 @@ bool amdgpu_ttm_tt_userptr_needs_pages(struct ttm_tt *ttm)
}
/**
- * amdgpu_ttm_tt_is_readonly - Is the ttm_tt object read only?
+ * DOC: amdgpu_ttm_tt_is_readonly
+ *
+ * Is the ttm_tt object read only?
*/
bool amdgpu_ttm_tt_is_readonly(struct ttm_tt *ttm)
{
@@ -1424,7 +1487,9 @@ bool amdgpu_ttm_tt_is_readonly(struct ttm_tt *ttm)
}
/**
- * amdgpu_ttm_tt_pte_flags - Compute PTE flags for ttm_tt object
+ * DOC: amdgpu_ttm_tt_pte_flags
+ *
+ * Compute PTE flags for ttm_tt object
*
* @ttm: The ttm_tt object to compute the flags for
* @mem: The memory registry backing this ttm_tt object
@@ -1454,8 +1519,9 @@ uint64_t amdgpu_ttm_tt_pte_flags(struct amdgpu_device *adev, struct ttm_tt *ttm,
}
/**
- * amdgpu_ttm_bo_eviction_valuable - Check to see if we can evict
- * a buffer object.
+ * DOC: amdgpu_ttm_bo_eviction_valuable
+ *
+ * Check to see if we can evict a buffer object.
*
* Return true if eviction is sensible. Called by
* ttm_mem_evict_first() on behalf of ttm_bo_mem_force_space()
@@ -1510,8 +1576,9 @@ static bool amdgpu_ttm_bo_eviction_valuable(struct ttm_buffer_object *bo,
}
/**
- * amdgpu_ttm_access_memory - Read or Write memory that backs a
- * buffer object.
+ * DOC: amdgpu_ttm_access_memory
+ *
+ * Read or Write memory that backs a buffer object.
*
* @bo: The buffer object to read/write
* @offset: Offset into buffer object
@@ -1602,7 +1669,9 @@ static struct ttm_bo_driver amdgpu_bo_driver = {
* Firmware Reservation functions
*/
/**
- * amdgpu_ttm_fw_reserve_vram_fini - free fw reserved vram
+ * DOC: amdgpu_ttm_fw_reserve_vram_fini
+ *
+ * free fw reserved vram
*
* @adev: amdgpu_device pointer
*
@@ -1615,7 +1684,9 @@ static void amdgpu_ttm_fw_reserve_vram_fini(struct amdgpu_device *adev)
}
/**
- * amdgpu_ttm_fw_reserve_vram_init - create bo vram reservation from fw
+ * DOC: amdgpu_ttm_fw_reserve_vram_init
+ *
+ * create bo vram reservation from fw
*
* @adev: amdgpu_device pointer
*
@@ -1699,8 +1770,10 @@ static int amdgpu_ttm_fw_reserve_vram_init(struct amdgpu_device *adev)
return r;
}
/**
- * amdgpu_ttm_init - Init the memory management (ttm) as well as
- * various gtt/vram related fields.
+ * DOC: amdgpu_ttm_init
+ *
+ * Init the memory management (ttm) as well as various gtt/vram
+ * related fields.
*
* This initializes all of the memory space pools that the TTM layer
* will need such as the GTT space (system memory mapped to the device),
@@ -1851,8 +1924,9 @@ int amdgpu_ttm_init(struct amdgpu_device *adev)
}
/**
- * amdgpu_ttm_late_init - Handle any late initialization for
- * amdgpu_ttm
+ * DOC: amdgpu_ttm_late_init
+ *
+ * Handle any late initialization for amdgpu_ttm
*/
void amdgpu_ttm_late_init(struct amdgpu_device *adev)
{
@@ -1861,7 +1935,9 @@ void amdgpu_ttm_late_init(struct amdgpu_device *adev)
}
/**
- * amdgpu_ttm_fini - De-initialize the TTM memory pools
+ * DOC: amdgpu_ttm_fini
+ *
+ * De-initialize the TTM memory pools
*/
void amdgpu_ttm_fini(struct amdgpu_device *adev)
{
@@ -1889,7 +1965,9 @@ void amdgpu_ttm_fini(struct amdgpu_device *adev)
}
/**
- * amdgpu_ttm_set_buffer_funcs_status - enable/disable use of buffer functions
+ * DOC: amdgpu_ttm_set_buffer_funcs_status
+ *
+ * enable/disable use of buffer functions
*
* @adev: amdgpu_device pointer
* @enable: true when we can use buffer functions.
@@ -1914,6 +1992,11 @@ void amdgpu_ttm_set_buffer_funcs_status(struct amdgpu_device *adev, bool enable)
adev->mman.buffer_funcs_enabled = enable;
}
+/**
+ * DOC: amdgpu_mmap
+ *
+ * Wrapper to handle memory mapping buffer objects owned by amdgpu.
+ */
int amdgpu_mmap(struct file *filp, struct vm_area_struct *vma)
{
struct drm_file *file_priv;
@@ -1930,6 +2013,13 @@ int amdgpu_mmap(struct file *filp, struct vm_area_struct *vma)
return ttm_bo_mmap(filp, vma, &adev->mman.bdev);
}
+/**
+ * DOC: amdgpu_map_buffer
+ *
+ * Map a window of TTM_PL_TT memory types to GTT space if the buffer
+ * object isn't already mapped. Called by
+ * amdgpu_ttm_copy_mem_to_mem().
+ */
static int amdgpu_map_buffer(struct ttm_buffer_object *bo,
struct ttm_mem_reg *mem, unsigned num_pages,
uint64_t offset, unsigned window,
@@ -1996,6 +2086,17 @@ static int amdgpu_map_buffer(struct ttm_buffer_object *bo,
return r;
}
+/**
+ * DOC: amdgpu_copy_buffer
+ *
+ * Use the SDMA to perform a copy from one offset to another. Called
+ * by amdgpu_copy_ttm_mem_to_mem() to finally copy windows of memory
+ * once they are mapped into GPU visible space.
+ *
+ * Also called by amdgpu_bo_backup_to_shadow() to backup a buffer
+ * object to shadow memory and vice versa with
+ * amdgpu_bo_restore_from_shadow().
+ */
int amdgpu_copy_buffer(struct amdgpu_ring *ring, uint64_t src_offset,
uint64_t dst_offset, uint32_t byte_count,
struct reservation_object *resv,
@@ -2072,6 +2173,11 @@ int amdgpu_copy_buffer(struct amdgpu_ring *ring, uint64_t src_offset,
return r;
}
+/**
+ * DOC: amdgpu_fill_buffer
+ *
+ * Emit a linear fill operation.
+ */
int amdgpu_fill_buffer(struct amdgpu_bo *bo,
uint32_t src_data,
struct reservation_object *resv,
@@ -2191,7 +2297,9 @@ static const struct drm_info_list amdgpu_ttm_debugfs_list[] = {
};
/**
- * amdgpu_ttm_vram_read - Linear read access to VRAM
+ * DOC: amdgpu_ttm_vram_read
+ *
+ * Linear read access to VRAM
*
* Accesses VRAM via MMIO for debugging purposes.
*/
@@ -2235,7 +2343,9 @@ static ssize_t amdgpu_ttm_vram_read(struct file *f, char __user *buf,
}
/**
- * amdgpu_ttm_vram_write - Linear write access to VRAM
+ * DOC: amdgpu_ttm_vram_write
+ *
+ * Linear write access to VRAM
*
* Accesses VRAM via MMIO for debugging purposes.
*/
@@ -2288,7 +2398,9 @@ static const struct file_operations amdgpu_ttm_vram_fops = {
#ifdef CONFIG_DRM_AMDGPU_GART_DEBUGFS
/**
- * amdgpu_ttm_gtt_read - Linear read access to GTT memory
+ * DOC: amdgpu_ttm_gtt_read
+ *
+ * Linear read access to GTT memory
*/
static ssize_t amdgpu_ttm_gtt_read(struct file *f, char __user *buf,
size_t size, loff_t *pos)
@@ -2338,7 +2450,9 @@ static const struct file_operations amdgpu_ttm_gtt_fops = {
#endif
/**
- * amdgpu_iomem_read - Virtual read access to GPU mapped memory
+ * DOC: amdgpu_iomem_read
+ *
+ * Virtual read access to GPU mapped memory.
*
* This function is used to read memory that has been mapped to the
* GPU and the known addresses are not physical addresses but instead
@@ -2394,7 +2508,9 @@ static ssize_t amdgpu_iomem_read(struct file *f, char __user *buf,
}
/**
- * amdgpu_iomem_write - Virtual write access to GPU mapped memory
+ * DOC: amdgpu_iomem_write
+ *
+ * Virtual write access to GPU mapped memory.
*
* This function is used to write memory that has been mapped to the
* GPU and the known addresses are not physical addresses but instead
--
2.14.3
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