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drm/ttm: merge ttm_bo_api.h and ttm_bo_driver.h v2 

Merge and cleanup the two headers into a single description of the
object API. Also move all the documentation to the implementation and
drop unnecessary includes from the header.

No functional change.

v2: minimal checkpatch.pl cleanup

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221125102137.1801-4-christian.koenig@amd.com
This commit is contained in:
Christian König 2022-05-09 21:13:35 +02:00
parent 9bff18d134
commit a3185f91d0
55 changed files with 410 additions and 557 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/gpu/drm/amd/amdgpu/amdgpu.h
View File

@ -52,8 +52,7 @@
#include <linux/pci.h>
#include <linux/aer.h>
#include <drm/ttm/ttm_bo_api.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_bo.h>
#include <drm/ttm/ttm_placement.h>
#include <drm/ttm/ttm_execbuf_util.h>

1
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
View File

@ -25,6 +25,7 @@
#include <linux/pagemap.h>
#include <linux/sched/mm.h>
#include <linux/sched/task.h>
#include <drm/ttm/ttm_tt.h>
#include "amdgpu_object.h"
#include "amdgpu_gem.h"

2
drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.h
View File

@ -28,6 +28,8 @@
struct hmm_range;
struct drm_file;
struct amdgpu_device;
struct amdgpu_bo;
struct amdgpu_bo_va;

2
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
View File

@ -32,6 +32,8 @@
#include <drm/amdgpu_drm.h>
#include <drm/drm_syncobj.h>
#include <drm/ttm/ttm_tt.h>
#include "amdgpu_cs.h"
#include "amdgpu.h"
#include "amdgpu_trace.h"

2
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.h
View File

@ -23,6 +23,8 @@
#ifndef __AMDGPU_CS_H__
#define __AMDGPU_CS_H__
#include <linux/ww_mutex.h>
#include "amdgpu_job.h"
#include "amdgpu_bo_list.h"
#include "amdgpu_ring.h"

1
drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
View File

@ -37,6 +37,7 @@
#include "amdgpu_dma_buf.h"
#include "amdgpu_xgmi.h"
#include <drm/amdgpu_drm.h>
#include <drm/ttm/ttm_tt.h>
#include <linux/dma-buf.h>
#include <linux/dma-fence-array.h>
#include <linux/pci-p2pdma.h>

1
drivers/gpu/drm/amd/amdgpu/amdgpu_fdinfo.h
View File

@ -30,7 +30,6 @@
#include <linux/rbtree.h>
#include <drm/gpu_scheduler.h>
#include <drm/drm_file.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <linux/sched/mm.h>
#include "amdgpu_sync.h"

1
drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
View File

@ -34,6 +34,7 @@
#include <drm/amdgpu_drm.h>
#include <drm/drm_drv.h>
#include <drm/drm_gem_ttm_helper.h>
#include <drm/ttm/ttm_tt.h>
#include "amdgpu.h"
#include "amdgpu_display.h"

1
drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
View File

@ -35,6 +35,7 @@
#include "amdgpu_xgmi.h"
#include <drm/drm_drv.h>
#include <drm/ttm/ttm_tt.h>
/**
* amdgpu_gmc_pdb0_alloc - allocate vram for pdb0

4
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
View File

@ -44,10 +44,10 @@
#include <linux/module.h>
#include <drm/drm_drv.h>
#include <drm/ttm/ttm_bo_api.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_bo.h>
#include <drm/ttm/ttm_placement.h>
#include <drm/ttm/ttm_range_manager.h>
#include <drm/ttm/ttm_tt.h>
#include <drm/amdgpu_drm.h>
#include <drm/drm_drv.h>

1
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
View File

@ -33,6 +33,7 @@
#include <drm/amdgpu_drm.h>
#include <drm/drm_drv.h>
#include <drm/ttm/ttm_tt.h>
#include "amdgpu.h"
#include "amdgpu_trace.h"
#include "amdgpu_amdkfd.h"

2
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
View File

@ -29,7 +29,7 @@
#include <linux/rbtree.h>
#include <drm/gpu_scheduler.h>
#include <drm/drm_file.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_bo.h>
#include <linux/sched/mm.h>
#include "amdgpu_sync.h"

1
drivers/gpu/drm/amd/amdkfd/kfd_svm.c
View File

@ -23,6 +23,7 @@
#include <linux/types.h>
#include <linux/sched/task.h>
#include <drm/ttm/ttm_tt.h>
#include "amdgpu_sync.h"
#include "amdgpu_object.h"
#include "amdgpu_vm.h"

2
drivers/gpu/drm/drm_gem_ttm_helper.c
View File

@ -3,6 +3,8 @@
#include <linux/module.h>
#include <drm/drm_gem_ttm_helper.h>
#include <drm/ttm/ttm_placement.h>
#include <drm/ttm/ttm_tt.h>
/**
* DOC: overview

1
drivers/gpu/drm/drm_gem_vram_helper.c
View File

@ -19,6 +19,7 @@
#include <drm/drm_simple_kms_helper.h>
#include <drm/ttm/ttm_range_manager.h>
#include <drm/ttm/ttm_tt.h>
static const struct drm_gem_object_funcs drm_gem_vram_object_funcs;

2
drivers/gpu/drm/i915/gem/i915_gem_object_types.h
View File

@ -10,7 +10,7 @@
#include <linux/mmu_notifier.h>
#include <drm/drm_gem.h>
#include <drm/ttm/ttm_bo_api.h>
#include <drm/ttm/ttm_bo.h>
#include <uapi/drm/i915_drm.h>
#include "i915_active.h"

2
drivers/gpu/drm/i915/gem/i915_gem_ttm.c
View File

@ -5,8 +5,8 @@
#include <linux/shmem_fs.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_placement.h>
#include <drm/ttm/ttm_tt.h>
#include <drm/drm_buddy.h>
#include "i915_drv.h"

2
drivers/gpu/drm/i915/gem/i915_gem_ttm_move.c
View File

@ -3,7 +3,7 @@
* Copyright © 2021 Intel Corporation
*/
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_tt.h>
#include "i915_deps.h"
#include "i915_drv.h"

2
drivers/gpu/drm/i915/i915_deps.c
View File

@ -6,7 +6,7 @@
#include <linux/dma-fence.h>
#include <linux/slab.h>
#include <drm/ttm/ttm_bo_api.h>
#include <drm/ttm/ttm_bo.h>
#include "i915_deps.h"

2
drivers/gpu/drm/i915/i915_ttm_buddy_manager.c
View File

@ -5,8 +5,8 @@
#include <linux/slab.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_placement.h>
#include <drm/ttm/ttm_bo.h>
#include <drm/drm_buddy.h>

1
drivers/gpu/drm/i915/intel_region_ttm.c
View File

@ -2,7 +2,6 @@
/*
* Copyright © 2021 Intel Corporation
*/
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_device.h>
#include <drm/ttm/ttm_range_manager.h>

1
drivers/gpu/drm/nouveau/nouveau_bo.c
View File

@ -28,6 +28,7 @@
*/
#include <linux/dma-mapping.h>
#include <drm/ttm/ttm_tt.h>
#include "nouveau_drv.h"
#include "nouveau_chan.h"

3
drivers/gpu/drm/nouveau/nouveau_bo.h
View File

@ -1,8 +1,9 @@
/* SPDX-License-Identifier: MIT */
#ifndef __NOUVEAU_BO_H__
#define __NOUVEAU_BO_H__
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/drm_gem.h>
#include <drm/ttm/ttm_bo.h>
#include <drm/ttm/ttm_placement.h>
struct nouveau_channel;
struct nouveau_cli;

3
drivers/gpu/drm/nouveau/nouveau_drv.h
View File

@ -51,8 +51,7 @@
#include <drm/drm_drv.h>
#include <drm/drm_file.h>
#include <drm/ttm/ttm_bo_api.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_bo.h>
#include <drm/ttm/ttm_placement.h>
#include <drm/drm_audio_component.h>

3
drivers/gpu/drm/nouveau/nouveau_mem.c
View File

@ -19,11 +19,12 @@
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#include <drm/ttm/ttm_tt.h>
#include "nouveau_mem.h"
#include "nouveau_drv.h"
#include "nouveau_bo.h"
#include <drm/ttm/ttm_bo_driver.h>
#include <nvif/class.h>
#include <nvif/if000a.h>

2
drivers/gpu/drm/nouveau/nouveau_mem.h
View File

@ -1,6 +1,6 @@
#ifndef __NOUVEAU_MEM_H__
#define __NOUVEAU_MEM_H__
#include <drm/ttm/ttm_bo_api.h>
#include <drm/ttm/ttm_bo.h>
struct ttm_tt;
#include <nvif/mem.h>

1
drivers/gpu/drm/nouveau/nouveau_prime.c
View File

@ -23,6 +23,7 @@
*/
#include <linux/dma-buf.h>
#include <drm/ttm/ttm_tt.h>
#include "nouveau_drv.h"
#include "nouveau_gem.h"

1
drivers/gpu/drm/nouveau/nouveau_sgdma.c
View File

@ -1,6 +1,7 @@
// SPDX-License-Identifier: MIT
#include <linux/pagemap.h>
#include <linux/slab.h>
#include <drm/ttm/ttm_tt.h>
#include "nouveau_drv.h"
#include "nouveau_mem.h"

3
drivers/gpu/drm/qxl/qxl_drv.h
View File

@ -42,8 +42,7 @@
#include <drm/drm_ioctl.h>
#include <drm/drm_gem.h>
#include <drm/qxl_drm.h>
#include <drm/ttm/ttm_bo_api.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_bo.h>
#include <drm/ttm/ttm_execbuf_util.h>
#include <drm/ttm/ttm_placement.h>

4
drivers/gpu/drm/qxl/qxl_ttm.c
View File

@ -29,10 +29,10 @@
#include <drm/drm_file.h>
#include <drm/drm_debugfs.h>
#include <drm/qxl_drm.h>
#include <drm/ttm/ttm_bo_api.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_bo.h>
#include <drm/ttm/ttm_placement.h>
#include <drm/ttm/ttm_range_manager.h>
#include <drm/ttm/ttm_tt.h>
#include "qxl_drv.h"
#include "qxl_object.h"

3
drivers/gpu/drm/radeon/radeon.h
View File

@ -73,8 +73,7 @@
#include <linux/mmu_notifier.h>
#endif
#include <drm/ttm/ttm_bo_api.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_bo.h>
#include <drm/ttm/ttm_placement.h>
#include <drm/ttm/ttm_execbuf_util.h>

2
drivers/gpu/drm/radeon/radeon_prime.c
View File

@ -29,6 +29,8 @@
#include <drm/drm_prime.h>
#include <drm/radeon_drm.h>
#include <drm/ttm/ttm_tt.h>
#include "radeon.h"
#include "radeon_prime.h"

4
drivers/gpu/drm/radeon/radeon_ttm.c
View File

@ -42,10 +42,10 @@
#include <drm/drm_file.h>
#include <drm/drm_prime.h>
#include <drm/radeon_drm.h>
#include <drm/ttm/ttm_bo_api.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_bo.h>
#include <drm/ttm/ttm_placement.h>
#include <drm/ttm/ttm_range_manager.h>
#include <drm/ttm/ttm_tt.h>
#include "radeon_reg.h"
#include "radeon.h"

81
drivers/gpu/drm/ttm/ttm_bo.c
View File

@ -31,8 +31,10 @@
#define pr_fmt(fmt) "[TTM] " fmt
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_bo.h>
#include <drm/ttm/ttm_placement.h>
#include <drm/ttm/ttm_tt.h>
#include <linux/jiffies.h>
#include <linux/slab.h>
#include <linux/sched.h>
@ -381,6 +383,13 @@ static void ttm_bo_release(struct kref *kref)
bo->destroy(bo);
}
/**
* ttm_bo_put
*
* @bo: The buffer object.
*
* Unreference a buffer object.
*/
void ttm_bo_put(struct ttm_buffer_object *bo)
{
kref_put(&bo->kref, ttm_bo_release);
@ -467,6 +476,14 @@ out:
return ret;
}
/**
* ttm_bo_eviction_valuable
*
* @bo: The buffer object to evict
* @place: the placement we need to make room for
*
* Check if it is valuable to evict the BO to make room for the given placement.
*/
bool ttm_bo_eviction_valuable(struct ttm_buffer_object *bo,
const struct ttm_place *place)
{
@ -726,13 +743,23 @@ static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo,
return ttm_bo_add_move_fence(bo, man, *mem, ctx->no_wait_gpu);
}
/*
* Creates space for memory region @mem according to its type.
/**
* ttm_bo_mem_space
*
* This function first searches for free space in compatible memory types in
* the priority order defined by the driver. If free space isn't found, then
* ttm_bo_mem_force_space is attempted in priority order to evict and find
* space.
* @bo: Pointer to a struct ttm_buffer_object. the data of which
* we want to allocate space for.
* @proposed_placement: Proposed new placement for the buffer object.
* @mem: A struct ttm_resource.
* @ctx: if and how to sleep, lock buffers and alloc memory
*
* Allocate memory space for the buffer object pointed to by @bo, using
* the placement flags in @placement, potentially evicting other idle buffer objects.
* This function may sleep while waiting for space to become available.
* Returns:
* -EBUSY: No space available (only if no_wait == 1).
* -ENOMEM: Could not allocate memory for the buffer object, either due to
* fragmentation or concurrent allocators.
* -ERESTARTSYS: An interruptible sleep was interrupted by a signal.
*/
int ttm_bo_mem_space(struct ttm_buffer_object *bo,
struct ttm_placement *placement,
@ -838,6 +865,21 @@ out:
return ret;
}
/**
* ttm_bo_validate
*
* @bo: The buffer object.
* @placement: Proposed placement for the buffer object.
* @ctx: validation parameters.
*
* Changes placement and caching policy of the buffer object
* according proposed placement.
* Returns
* -EINVAL on invalid proposed placement.
* -ENOMEM on out-of-memory condition.
* -EBUSY if no_wait is true and buffer busy.
* -ERESTARTSYS if interrupted by a signal.
*/
int ttm_bo_validate(struct ttm_buffer_object *bo,
struct ttm_placement *placement,
struct ttm_operation_ctx *ctx)
@ -1030,6 +1072,11 @@ EXPORT_SYMBOL(ttm_bo_init_validate);
* buffer object vm functions.
*/
/**
* ttm_bo_unmap_virtual
*
* @bo: tear down the virtual mappings for this BO
*/
void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo)
{
struct ttm_device *bdev = bo->bdev;
@ -1039,6 +1086,20 @@ void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo)
}
EXPORT_SYMBOL(ttm_bo_unmap_virtual);
/**
* ttm_bo_wait - wait for buffer idle.
*
* @bo: The buffer object.
* @interruptible: Use interruptible wait.
* @no_wait: Return immediately if buffer is busy.
*
* This function must be called with the bo::mutex held, and makes
* sure any previous rendering to the buffer is completed.
* Note: It might be necessary to block validations before the
* wait by reserving the buffer.
* Returns -EBUSY if no_wait is true and the buffer is busy.
* Returns -ERESTARTSYS if interrupted by a signal.
*/
int ttm_bo_wait(struct ttm_buffer_object *bo,
bool interruptible, bool no_wait)
{
@ -1063,6 +1124,12 @@ int ttm_bo_wait(struct ttm_buffer_object *bo,
}
EXPORT_SYMBOL(ttm_bo_wait);
int ttm_bo_wait_ctx(struct ttm_buffer_object *bo, struct ttm_operation_ctx *ctx)
{
return ttm_bo_wait(bo, ctx->interruptible, ctx->no_wait_gpu);
}
EXPORT_SYMBOL(ttm_bo_wait_ctx);
int ttm_bo_swapout(struct ttm_buffer_object *bo, struct ttm_operation_ctx *ctx,
gfp_t gfp_flags)
{

110
drivers/gpu/drm/ttm/ttm_bo_util.c
View File

@ -29,18 +29,11 @@
* Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
*/
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_bo.h>
#include <drm/ttm/ttm_placement.h>
#include <drm/ttm/ttm_tt.h>
#include <drm/drm_cache.h>
#include <drm/drm_vma_manager.h>
#include <linux/iosys-map.h>
#include <linux/io.h>
#include <linux/highmem.h>
#include <linux/wait.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/module.h>
#include <linux/dma-resv.h>
struct ttm_transfer_obj {
struct ttm_buffer_object base;
@ -128,6 +121,23 @@ void ttm_move_memcpy(bool clear,
}
EXPORT_SYMBOL(ttm_move_memcpy);
/**
* ttm_bo_move_memcpy
*
* @bo: A pointer to a struct ttm_buffer_object.
* @interruptible: Sleep interruptible if waiting.
* @no_wait_gpu: Return immediately if the GPU is busy.
* @new_mem: struct ttm_resource indicating where to move.
*
* Fallback move function for a mappable buffer object in mappable memory.
* The function will, if successful,
* free any old aperture space, and set (@new_mem)->mm_node to NULL,
* and update the (@bo)->mem placement flags. If unsuccessful, the old
* data remains untouched, and it's up to the caller to free the
* memory space indicated by @new_mem.
* Returns:
* !0: Failure.
*/
int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,
struct ttm_operation_ctx *ctx,
struct ttm_resource *dst_mem)
@ -266,6 +276,16 @@ static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo,
return 0;
}
/**
* ttm_io_prot
*
* bo: ttm buffer object
* res: ttm resource object
* @tmp: Page protection flag for a normal, cached mapping.
*
* Utility function that returns the pgprot_t that should be used for
* setting up a PTE with the caching model indicated by @c_state.
*/
pgprot_t ttm_io_prot(struct ttm_buffer_object *bo, struct ttm_resource *res,
pgprot_t tmp)
{
@ -347,6 +367,22 @@ static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo,
return (!map->virtual) ? -ENOMEM : 0;
}
/**
* ttm_bo_kmap
*
* @bo: The buffer object.
* @start_page: The first page to map.
* @num_pages: Number of pages to map.
* @map: pointer to a struct ttm_bo_kmap_obj representing the map.
*
* Sets up a kernel virtual mapping, using ioremap, vmap or kmap to the
* data in the buffer object. The ttm_kmap_obj_virtual function can then be
* used to obtain a virtual address to the data.
*
* Returns
* -ENOMEM: Out of memory.
* -EINVAL: Invalid range.
*/
int ttm_bo_kmap(struct ttm_buffer_object *bo,
unsigned long start_page, unsigned long num_pages,
struct ttm_bo_kmap_obj *map)
@ -374,6 +410,13 @@ int ttm_bo_kmap(struct ttm_buffer_object *bo,
}
EXPORT_SYMBOL(ttm_bo_kmap);
/**
* ttm_bo_kunmap
*
* @map: Object describing the map to unmap.
*
* Unmaps a kernel map set up by ttm_bo_kmap.
*/
void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map)
{
if (!map->virtual)
@ -399,6 +442,20 @@ void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map)
}
EXPORT_SYMBOL(ttm_bo_kunmap);
/**
* ttm_bo_vmap
*
* @bo: The buffer object.
* @map: pointer to a struct iosys_map representing the map.
*
* Sets up a kernel virtual mapping, using ioremap or vmap to the
* data in the buffer object. The parameter @map returns the virtual
* address as struct iosys_map. Unmap the buffer with ttm_bo_vunmap().
*
* Returns
* -ENOMEM: Out of memory.
* -EINVAL: Invalid range.
*/
int ttm_bo_vmap(struct ttm_buffer_object *bo, struct iosys_map *map)
{
struct ttm_resource *mem = bo->resource;
@ -460,6 +517,14 @@ int ttm_bo_vmap(struct ttm_buffer_object *bo, struct iosys_map *map)
}
EXPORT_SYMBOL(ttm_bo_vmap);
/**
* ttm_bo_vunmap
*
* @bo: The buffer object.
* @map: Object describing the map to unmap.
*
* Unmaps a kernel map set up by ttm_bo_vmap().
*/
void ttm_bo_vunmap(struct ttm_buffer_object *bo, struct iosys_map *map)
{
struct ttm_resource *mem = bo->resource;
@ -553,6 +618,22 @@ static void ttm_bo_move_pipeline_evict(struct ttm_buffer_object *bo,
ttm_resource_free(bo, &bo->resource);
}
/**
* ttm_bo_move_accel_cleanup.
*
* @bo: A pointer to a struct ttm_buffer_object.
* @fence: A fence object that signals when moving is complete.
* @evict: This is an evict move. Don't return until the buffer is idle.
* @pipeline: evictions are to be pipelined.
* @new_mem: struct ttm_resource indicating where to move.
*
* Accelerated move function to be called when an accelerated move
* has been scheduled. The function will create a new temporary buffer object
* representing the old placement, and put the sync object on both buffer
* objects. After that the newly created buffer object is unref'd to be
* destroyed when the move is complete. This will help pipeline
* buffer moves.
*/
int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo,
struct dma_fence *fence,
bool evict,
@ -581,6 +662,15 @@ int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo,
}
EXPORT_SYMBOL(ttm_bo_move_accel_cleanup);
/**
* ttm_bo_move_sync_cleanup.
*
* @bo: A pointer to a struct ttm_buffer_object.
* @new_mem: struct ttm_resource indicating where to move.
*
* Special case of ttm_bo_move_accel_cleanup where the bo is guaranteed
* by the caller to be idle. Typically used after memcpy buffer moves.
*/
void ttm_bo_move_sync_cleanup(struct ttm_buffer_object *bo,
struct ttm_resource *new_mem)
{

19
drivers/gpu/drm/ttm/ttm_bo_vm.c
View File

@ -31,17 +31,12 @@
#define pr_fmt(fmt) "[TTM] " fmt
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_bo.h>
#include <drm/ttm/ttm_placement.h>
#include <drm/drm_vma_manager.h>
#include <drm/ttm/ttm_tt.h>
#include <drm/drm_drv.h>
#include <drm/drm_managed.h>
#include <linux/mm.h>
#include <linux/pfn_t.h>
#include <linux/rbtree.h>
#include <linux/module.h>
#include <linux/uaccess.h>
#include <linux/mem_encrypt.h>
static vm_fault_t ttm_bo_vm_fault_idle(struct ttm_buffer_object *bo,
struct vm_fault *vmf)
@ -446,6 +441,14 @@ static const struct vm_operations_struct ttm_bo_vm_ops = {
.access = ttm_bo_vm_access,
};
/**
* ttm_bo_mmap_obj - mmap memory backed by a ttm buffer object.
*
* @vma: vma as input from the fbdev mmap method.
* @bo: The bo backing the address space.
*
* Maps a buffer object.
*/
int ttm_bo_mmap_obj(struct vm_area_struct *vma, struct ttm_buffer_object *bo)
{
/* Enforce no COW since would have really strange behavior with it. */

2
drivers/gpu/drm/ttm/ttm_device.c
View File

@ -29,10 +29,10 @@
#include <linux/mm.h>
#include <drm/ttm/ttm_bo.h>
#include <drm/ttm/ttm_device.h>
#include <drm/ttm/ttm_tt.h>
#include <drm/ttm/ttm_placement.h>
#include <drm/ttm/ttm_bo_api.h>
#include "ttm_module.h"

6
drivers/gpu/drm/ttm/ttm_execbuf_util.c
View File

@ -27,11 +27,7 @@
**************************************************************************/
#include <drm/ttm/ttm_execbuf_util.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_placement.h>
#include <linux/wait.h>
#include <linux/sched.h>
#include <linux/module.h>
#include <drm/ttm/ttm_bo.h>
static void ttm_eu_backoff_reservation_reverse(struct list_head *list,
struct ttm_validate_buffer *entry)

3
drivers/gpu/drm/ttm/ttm_pool.c
View File

@ -33,6 +33,7 @@
#include <linux/module.h>
#include <linux/dma-mapping.h>
#include <linux/debugfs.h>
#include <linux/highmem.h>
#include <linux/sched/mm.h>
@ -41,8 +42,8 @@
#endif
#include <drm/ttm/ttm_pool.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_tt.h>
#include <drm/ttm/ttm_bo.h>
#include "ttm_module.h"

2
drivers/gpu/drm/ttm/ttm_range_manager.c
View File

@ -32,7 +32,7 @@
#include <drm/ttm/ttm_device.h>
#include <drm/ttm/ttm_placement.h>
#include <drm/ttm/ttm_range_manager.h>
#include <drm/ttm/ttm_bo_api.h>
#include <drm/ttm/ttm_bo.h>
#include <drm/drm_mm.h>
#include <linux/slab.h>
#include <linux/spinlock.h>

3
drivers/gpu/drm/ttm/ttm_resource.c
View File

@ -26,8 +26,9 @@
#include <linux/io-mapping.h>
#include <linux/scatterlist.h>
#include <drm/ttm/ttm_bo.h>
#include <drm/ttm/ttm_placement.h>
#include <drm/ttm/ttm_resource.h>
#include <drm/ttm/ttm_bo_driver.h>
/**
* ttm_lru_bulk_move_init - initialize a bulk move structure

3
drivers/gpu/drm/ttm/ttm_tt.c
View File

@ -36,7 +36,8 @@
#include <linux/file.h>
#include <linux/module.h>
#include <drm/drm_cache.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_bo.h>
#include <drm/ttm/ttm_tt.h>
#include "ttm_module.h"

2
drivers/gpu/drm/vmwgfx/vmwgfx_cmdbuf.c
View File

@ -28,7 +28,7 @@
#include <linux/dmapool.h>
#include <linux/pci.h>
#include <drm/ttm/ttm_bo_api.h>
#include <drm/ttm/ttm_bo.h>
#include "vmwgfx_drv.h"

1
drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
View File

@ -40,7 +40,6 @@
#include <drm/drm_ioctl.h>
#include <drm/drm_module.h>
#include <drm/drm_sysfs.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_range_manager.h>
#include <drm/ttm/ttm_placement.h>
#include <generated/utsrelease.h>

4
drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
View File

@ -37,8 +37,10 @@
#include <drm/drm_file.h>
#include <drm/drm_rect.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_execbuf_util.h>
#include <drm/ttm/ttm_tt.h>
#include <drm/ttm/ttm_placement.h>
#include <drm/ttm/ttm_bo.h>
#include "ttm_object.h"

2
drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
View File

@ -29,7 +29,7 @@
#include "vmwgfx_drv.h"
#include "vmwgfx_reg.h"
#include <drm/ttm/ttm_bo_api.h>
#include <drm/ttm/ttm_bo.h>
#include <drm/ttm/ttm_placement.h>
#include "vmwgfx_so.h"
#include "vmwgfx_binding.h"

1
drivers/gpu/drm/vmwgfx/vmwgfx_gmr.c
View File

@ -25,7 +25,6 @@
*
**************************************************************************/
#include <drm/ttm/ttm_bo_driver.h>
#include "vmwgfx_drv.h"

1
drivers/gpu/drm/vmwgfx/vmwgfx_gmrid_manager.c
View File

@ -29,7 +29,6 @@
*/
#include "vmwgfx_drv.h"
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_placement.h>
#include <linux/idr.h>
#include <linux/spinlock.h>

1
drivers/gpu/drm/vmwgfx/vmwgfx_system_manager.c
View File

@ -26,7 +26,6 @@
#include "vmwgfx_drv.h"
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_device.h>
#include <drm/ttm/ttm_placement.h>
#include <drm/ttm/ttm_resource.h>

1
drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c
View File

@ -26,7 +26,6 @@
**************************************************************************/
#include "vmwgfx_drv.h"
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_placement.h>
static const struct ttm_place vram_placement_flags = {

3
include/drm/drm_gem_ttm_helper.h
View File

@ -7,8 +7,7 @@
#include <drm/drm_device.h>
#include <drm/drm_gem.h>
#include <drm/ttm/ttm_bo_api.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_bo.h>
struct iosys_map;

4
include/drm/drm_gem_vram_helper.h
View File

@ -8,8 +8,8 @@
#include <drm/drm_gem_ttm_helper.h>
#include <drm/drm_ioctl.h>
#include <drm/drm_modes.h>
#include <drm/ttm/ttm_bo_api.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_bo.h>
#include <drm/ttm/ttm_placement.h>
#include <linux/container_of.h>
#include <linux/iosys-map.h>

345
include/drm/ttm/ttm_bo_api.h → include/drm/ttm/ttm_bo.h
View File

@ -32,28 +32,24 @@
#define _TTM_BO_API_H_
#include <drm/drm_gem.h>
#include <drm/drm_vma_manager.h>
#include <linux/kref.h>
#include <linux/list.h>
#include <linux/wait.h>
#include <linux/mutex.h>
#include <linux/mm.h>
#include <linux/bitmap.h>
#include <linux/dma-resv.h>
#include "ttm_resource.h"
#include "ttm_device.h"
struct ttm_global;
struct ttm_device;
/* Default number of pre-faulted pages in the TTM fault handler */
#define TTM_BO_VM_NUM_PREFAULT 16
struct iosys_map;
struct drm_mm_node;
struct ttm_global;
struct ttm_device;
struct ttm_placement;
struct ttm_place;
struct ttm_resource;
struct ttm_resource_manager;
struct ttm_tt;
/**
* enum ttm_bo_type
@ -68,15 +64,12 @@ struct ttm_place;
* @ttm_bo_type_sg: Buffer made from dmabuf sg table shared with another
* driver.
*/
enum ttm_bo_type {
ttm_bo_type_device,
ttm_bo_type_kernel,
ttm_bo_type_sg
};
struct ttm_tt;
/**
* struct ttm_buffer_object
*
@ -85,17 +78,11 @@ struct ttm_tt;
* @type: The bo type.
* @page_alignment: Page alignment.
* @destroy: Destruction function. If NULL, kfree is used.
* @num_pages: Actual number of pages.
* @kref: Reference count of this buffer object. When this refcount reaches
* zero, the object is destroyed or put on the delayed delete list.
* @mem: structure describing current placement.
* @resource: structure describing current placement.
* @ttm: TTM structure holding system pages.
* @evicted: Whether the object was evicted without user-space knowing.
* @deleted: True if the object is only a zombie and already deleted.
* @swap: List head for swap LRU list.
* @offset: The current GPU offset, which can have different meanings
* depending on the memory type. For SYSTEM type memory, it should be 0.
* @cur_placement: Hint of current placement.
*
* Base class for TTM buffer object, that deals with data placement and CPU
* mappings. GPU mappings are really up to the driver, but for simpler GPUs
@ -108,28 +95,25 @@ struct ttm_tt;
* The destroy member, the API visibility of this object makes it possible
* to derive driver specific types.
*/
struct ttm_buffer_object {
struct drm_gem_object base;
/**
/*
* Members constant at init.
*/
struct ttm_device *bdev;
enum ttm_bo_type type;
uint32_t page_alignment;
void (*destroy) (struct ttm_buffer_object *);
/**
/*
* Members not needing protection.
*/
struct kref kref;
/**
/*
* Members protected by the bo::resv::reserved lock.
*/
struct ttm_resource *resource;
struct ttm_tt *ttm;
bool deleted;
@ -148,7 +132,6 @@ struct ttm_buffer_object {
* and the bo::lock when written to. Can be read with
* either of these locks held.
*/
struct sg_table *sg;
};
@ -164,7 +147,6 @@ struct ttm_buffer_object {
* mapping can either be an ioremap, a vmap, a kmap or part of a
* premapped region.
*/
#define TTM_BO_MAP_IOMEM_MASK 0x80
struct ttm_bo_kmap_obj {
void *virtual;
@ -232,79 +214,120 @@ ttm_bo_get_unless_zero(struct ttm_buffer_object *bo)
}
/**
* ttm_bo_wait - wait for buffer idle.
* ttm_bo_reserve:
*
* @bo: The buffer object.
* @interruptible: Use interruptible wait.
* @no_wait: Return immediately if buffer is busy.
* @bo: A pointer to a struct ttm_buffer_object.
* @interruptible: Sleep interruptible if waiting.
* @no_wait: Don't sleep while trying to reserve, rather return -EBUSY.
* @ticket: ticket used to acquire the ww_mutex.
*
* This function must be called with the bo::mutex held, and makes
* sure any previous rendering to the buffer is completed.
* Note: It might be necessary to block validations before the
* wait by reserving the buffer.
* Returns -EBUSY if no_wait is true and the buffer is busy.
* Returns -ERESTARTSYS if interrupted by a signal.
* Locks a buffer object for validation. (Or prevents other processes from
* locking it for validation), while taking a number of measures to prevent
* deadlocks.
*
* Returns:
* -EDEADLK: The reservation may cause a deadlock.
* Release all buffer reservations, wait for @bo to become unreserved and
* try again.
* -ERESTARTSYS: A wait for the buffer to become unreserved was interrupted by
* a signal. Release all buffer reservations and return to user-space.
* -EBUSY: The function needed to sleep, but @no_wait was true
* -EALREADY: Bo already reserved using @ticket. This error code will only
* be returned if @use_ticket is set to true.
*/
int ttm_bo_wait(struct ttm_buffer_object *bo, bool interruptible, bool no_wait);
static inline int ttm_bo_wait_ctx(struct ttm_buffer_object *bo, struct ttm_operation_ctx *ctx)
static inline int ttm_bo_reserve(struct ttm_buffer_object *bo,
bool interruptible, bool no_wait,
struct ww_acquire_ctx *ticket)
{
return ttm_bo_wait(bo, ctx->interruptible, ctx->no_wait_gpu);
int ret = 0;
if (no_wait) {
bool success;
if (WARN_ON(ticket))
return -EBUSY;
success = dma_resv_trylock(bo->base.resv);
return success ? 0 : -EBUSY;
}
if (interruptible)
ret = dma_resv_lock_interruptible(bo->base.resv, ticket);
else
ret = dma_resv_lock(bo->base.resv, ticket);
if (ret == -EINTR)
return -ERESTARTSYS;
return ret;
}
/**
* ttm_bo_validate
* ttm_bo_reserve_slowpath:
* @bo: A pointer to a struct ttm_buffer_object.
* @interruptible: Sleep interruptible if waiting.
* @sequence: Set (@bo)->sequence to this value after lock
*
* @bo: The buffer object.
* @placement: Proposed placement for the buffer object.
* @ctx: validation parameters.
*
* Changes placement and caching policy of the buffer object
* according proposed placement.
* Returns
* -EINVAL on invalid proposed placement.
* -ENOMEM on out-of-memory condition.
* -EBUSY if no_wait is true and buffer busy.
* -ERESTARTSYS if interrupted by a signal.
* This is called after ttm_bo_reserve returns -EAGAIN and we backed off
* from all our other reservations. Because there are no other reservations
* held by us, this function cannot deadlock any more.
*/
int ttm_bo_validate(struct ttm_buffer_object *bo,
struct ttm_placement *placement,
struct ttm_operation_ctx *ctx);
/**
* ttm_bo_put
*
* @bo: The buffer object.
*
* Unreference a buffer object.
*/
void ttm_bo_put(struct ttm_buffer_object *bo);
static inline int ttm_bo_reserve_slowpath(struct ttm_buffer_object *bo,
bool interruptible,
struct ww_acquire_ctx *ticket)
{
if (interruptible) {
int ret = dma_resv_lock_slow_interruptible(bo->base.resv,
ticket);
if (ret == -EINTR)
ret = -ERESTARTSYS;
return ret;
}
dma_resv_lock_slow(bo->base.resv, ticket);
return 0;
}
void ttm_bo_move_to_lru_tail(struct ttm_buffer_object *bo);
void ttm_bo_set_bulk_move(struct ttm_buffer_object *bo,
struct ttm_lru_bulk_move *bulk);
static inline void
ttm_bo_move_to_lru_tail_unlocked(struct ttm_buffer_object *bo)
{
spin_lock(&bo->bdev->lru_lock);
ttm_bo_move_to_lru_tail(bo);
spin_unlock(&bo->bdev->lru_lock);
}
static inline void ttm_bo_assign_mem(struct ttm_buffer_object *bo,
struct ttm_resource *new_mem)
{
WARN_ON(bo->resource);
bo->resource = new_mem;
}
/**
* ttm_bo_eviction_valuable
* ttm_bo_move_null = assign memory for a buffer object.
* @bo: The bo to assign the memory to
* @new_mem: The memory to be assigned.
*
* @bo: The buffer object to evict
* @place: the placement we need to make room for
*
* Check if it is valuable to evict the BO to make room for the given placement.
* Assign the memory from new_mem to the memory of the buffer object bo.
*/
bool ttm_bo_eviction_valuable(struct ttm_buffer_object *bo,
const struct ttm_place *place);
static inline void ttm_bo_move_null(struct ttm_buffer_object *bo,
struct ttm_resource *new_mem)
{
ttm_resource_free(bo, &bo->resource);
ttm_bo_assign_mem(bo, new_mem);
}
int ttm_bo_init_reserved(struct ttm_device *bdev, struct ttm_buffer_object *bo,
enum ttm_bo_type type, struct ttm_placement *placement,
uint32_t alignment, struct ttm_operation_ctx *ctx,
struct sg_table *sg, struct dma_resv *resv,
void (*destroy) (struct ttm_buffer_object *));
int ttm_bo_init_validate(struct ttm_device *bdev, struct ttm_buffer_object *bo,
enum ttm_bo_type type, struct ttm_placement *placement,
uint32_t alignment, bool interruptible,
struct sg_table *sg, struct dma_resv *resv,
void (*destroy) (struct ttm_buffer_object *));
/**
* ttm_bo_unreserve
*
* @bo: A pointer to a struct ttm_buffer_object.
*
* Unreserve a previous reservation of @bo.
*/
static inline void ttm_bo_unreserve(struct ttm_buffer_object *bo)
{
ttm_bo_move_to_lru_tail_unlocked(bo);
dma_resv_unlock(bo->base.resv);
}
/**
* ttm_kmap_obj_virtual
@ -324,124 +347,84 @@ static inline void *ttm_kmap_obj_virtual(struct ttm_bo_kmap_obj *map,
return map->virtual;
}
/**
* ttm_bo_kmap
*
* @bo: The buffer object.
* @start_page: The first page to map.
* @num_pages: Number of pages to map.
* @map: pointer to a struct ttm_bo_kmap_obj representing the map.
*
* Sets up a kernel virtual mapping, using ioremap, vmap or kmap to the
* data in the buffer object. The ttm_kmap_obj_virtual function can then be
* used to obtain a virtual address to the data.
*
* Returns
* -ENOMEM: Out of memory.
* -EINVAL: Invalid range.
*/
int ttm_bo_wait(struct ttm_buffer_object *bo, bool interruptible, bool no_wait);
int ttm_bo_wait_ctx(struct ttm_buffer_object *bo,
struct ttm_operation_ctx *ctx);
int ttm_bo_validate(struct ttm_buffer_object *bo,
struct ttm_placement *placement,
struct ttm_operation_ctx *ctx);
void ttm_bo_put(struct ttm_buffer_object *bo);
void ttm_bo_set_bulk_move(struct ttm_buffer_object *bo,
struct ttm_lru_bulk_move *bulk);
int ttm_bo_lock_delayed_workqueue(struct ttm_device *bdev);
void ttm_bo_unlock_delayed_workqueue(struct ttm_device *bdev, int resched);
bool ttm_bo_eviction_valuable(struct ttm_buffer_object *bo,
const struct ttm_place *place);
int ttm_bo_init_reserved(struct ttm_device *bdev, struct ttm_buffer_object *bo,
enum ttm_bo_type type, struct ttm_placement *placement,
uint32_t alignment, struct ttm_operation_ctx *ctx,
struct sg_table *sg, struct dma_resv *resv,
void (*destroy)(struct ttm_buffer_object *));
int ttm_bo_init_validate(struct ttm_device *bdev, struct ttm_buffer_object *bo,
enum ttm_bo_type type, struct ttm_placement *placement,
uint32_t alignment, bool interruptible,
struct sg_table *sg, struct dma_resv *resv,
void (*destroy)(struct ttm_buffer_object *));
int ttm_bo_kmap(struct ttm_buffer_object *bo, unsigned long start_page,
unsigned long num_pages, struct ttm_bo_kmap_obj *map);
/**
* ttm_bo_kunmap
*
* @map: Object describing the map to unmap.
*
* Unmaps a kernel map set up by ttm_bo_kmap.
*/
void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map);
/**
* ttm_bo_vmap
*
* @bo: The buffer object.
* @map: pointer to a struct iosys_map representing the map.
*
* Sets up a kernel virtual mapping, using ioremap or vmap to the
* data in the buffer object. The parameter @map returns the virtual
* address as struct iosys_map. Unmap the buffer with ttm_bo_vunmap().
*
* Returns
* -ENOMEM: Out of memory.
* -EINVAL: Invalid range.
*/
int ttm_bo_vmap(struct ttm_buffer_object *bo, struct iosys_map *map);
/**
* ttm_bo_vunmap
*
* @bo: The buffer object.
* @map: Object describing the map to unmap.
*
* Unmaps a kernel map set up by ttm_bo_vmap().
*/
void ttm_bo_vunmap(struct ttm_buffer_object *bo, struct iosys_map *map);
/**
* ttm_bo_mmap_obj - mmap memory backed by a ttm buffer object.
*
* @vma: vma as input from the fbdev mmap method.
* @bo: The bo backing the address space.
*
* Maps a buffer object.
*/
int ttm_bo_mmap_obj(struct vm_area_struct *vma, struct ttm_buffer_object *bo);
/**
* ttm_bo_io
*
* @bdev: Pointer to the struct ttm_device.
* @filp: Pointer to the struct file attempting to read / write.
* @wbuf: User-space pointer to address of buffer to write. NULL on read.
* @rbuf: User-space pointer to address of buffer to read into.
* Null on write.
* @count: Number of bytes to read / write.
* @f_pos: Pointer to current file position.
* @write: 1 for read, 0 for write.
*
* This function implements read / write into ttm buffer objects, and is
* intended to
* be called from the fops::read and fops::write method.
* Returns:
* See man (2) write, man(2) read. In particular,
* the function may return -ERESTARTSYS if
* interrupted by a signal.
*/
ssize_t ttm_bo_io(struct ttm_device *bdev, struct file *filp,
const char __user *wbuf, char __user *rbuf,
size_t count, loff_t *f_pos, bool write);
int ttm_bo_swapout(struct ttm_buffer_object *bo, struct ttm_operation_ctx *ctx,
gfp_t gfp_flags);
void ttm_bo_pin(struct ttm_buffer_object *bo);
void ttm_bo_unpin(struct ttm_buffer_object *bo);
int ttm_mem_evict_first(struct ttm_device *bdev,
struct ttm_resource_manager *man,
const struct ttm_place *place,
struct ttm_operation_ctx *ctx,
struct ww_acquire_ctx *ticket);
/* Default number of pre-faulted pages in the TTM fault handler */
#define TTM_BO_VM_NUM_PREFAULT 16
vm_fault_t ttm_bo_vm_reserve(struct ttm_buffer_object *bo,
struct vm_fault *vmf);
vm_fault_t ttm_bo_vm_fault_reserved(struct vm_fault *vmf,
pgprot_t prot,
pgoff_t num_prefault);
vm_fault_t ttm_bo_vm_fault(struct vm_fault *vmf);
void ttm_bo_vm_open(struct vm_area_struct *vma);
void ttm_bo_vm_close(struct vm_area_struct *vma);
int ttm_bo_vm_access(struct vm_area_struct *vma, unsigned long addr,
void *buf, int len, int write);
vm_fault_t ttm_bo_vm_dummy_page(struct vm_fault *vmf, pgprot_t prot);
int ttm_bo_mem_space(struct ttm_buffer_object *bo,
struct ttm_placement *placement,
struct ttm_resource **mem,
struct ttm_operation_ctx *ctx);
void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo);
/*
* ttm_bo_util.c
*/
int ttm_mem_io_reserve(struct ttm_device *bdev,
struct ttm_resource *mem);
void ttm_mem_io_free(struct ttm_device *bdev,
struct ttm_resource *mem);
void ttm_move_memcpy(bool clear, u32 num_pages,
struct ttm_kmap_iter *dst_iter,
struct ttm_kmap_iter *src_iter);
int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,
struct ttm_operation_ctx *ctx,
struct ttm_resource *new_mem);
int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo,
struct dma_fence *fence, bool evict,
bool pipeline,
struct ttm_resource *new_mem);
void ttm_bo_move_sync_cleanup(struct ttm_buffer_object *bo,
struct ttm_resource *new_mem);
int ttm_bo_pipeline_gutting(struct ttm_buffer_object *bo);
pgprot_t ttm_io_prot(struct ttm_buffer_object *bo, struct ttm_resource *res,
pgprot_t tmp);
void ttm_bo_tt_destroy(struct ttm_buffer_object *bo);
#endif

303
include/drm/ttm/ttm_bo_driver.h
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@ -1,303 +0,0 @@
/**************************************************************************
*
* Copyright (c) 2006-2009 Vmware, Inc., Palo Alto, CA., USA
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
/*
* Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
*/
#ifndef _TTM_BO_DRIVER_H_
#define _TTM_BO_DRIVER_H_
#include <drm/drm_mm.h>
#include <drm/drm_vma_manager.h>
#include <linux/workqueue.h>
#include <linux/fs.h>
#include <linux/spinlock.h>
#include <linux/dma-resv.h>
#include <drm/ttm/ttm_device.h>
#include "ttm_bo_api.h"
#include "ttm_kmap_iter.h"
#include "ttm_placement.h"
#include "ttm_tt.h"
#include "ttm_pool.h"
/*
* ttm_bo.c
*/
/**
* ttm_bo_mem_space
*
* @bo: Pointer to a struct ttm_buffer_object. the data of which
* we want to allocate space for.
* @proposed_placement: Proposed new placement for the buffer object.
* @mem: A struct ttm_resource.
* @interruptible: Sleep interruptible when sliping.
* @no_wait_gpu: Return immediately if the GPU is busy.
*
* Allocate memory space for the buffer object pointed to by @bo, using
* the placement flags in @mem, potentially evicting other idle buffer objects.
* This function may sleep while waiting for space to become available.
* Returns:
* -EBUSY: No space available (only if no_wait == 1).
* -ENOMEM: Could not allocate memory for the buffer object, either due to
* fragmentation or concurrent allocators.
* -ERESTARTSYS: An interruptible sleep was interrupted by a signal.
*/
int ttm_bo_mem_space(struct ttm_buffer_object *bo,
struct ttm_placement *placement,
struct ttm_resource **mem,
struct ttm_operation_ctx *ctx);
/**
* ttm_bo_unmap_virtual
*
* @bo: tear down the virtual mappings for this BO
*/
void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo);
/**
* ttm_bo_reserve:
*
* @bo: A pointer to a struct ttm_buffer_object.
* @interruptible: Sleep interruptible if waiting.
* @no_wait: Don't sleep while trying to reserve, rather return -EBUSY.
* @ticket: ticket used to acquire the ww_mutex.
*
* Locks a buffer object for validation. (Or prevents other processes from
* locking it for validation), while taking a number of measures to prevent
* deadlocks.
*
* Returns:
* -EDEADLK: The reservation may cause a deadlock.
* Release all buffer reservations, wait for @bo to become unreserved and
* try again.
* -ERESTARTSYS: A wait for the buffer to become unreserved was interrupted by
* a signal. Release all buffer reservations and return to user-space.
* -EBUSY: The function needed to sleep, but @no_wait was true
* -EALREADY: Bo already reserved using @ticket. This error code will only
* be returned if @use_ticket is set to true.
*/
static inline int ttm_bo_reserve(struct ttm_buffer_object *bo,
bool interruptible, bool no_wait,
struct ww_acquire_ctx *ticket)
{
int ret;
if (no_wait) {
bool success;
if (WARN_ON(ticket))
return -EBUSY;
success = dma_resv_trylock(bo->base.resv);
return success ? 0 : -EBUSY;
}
if (interruptible)
ret = dma_resv_lock_interruptible(bo->base.resv, ticket);
else
ret = dma_resv_lock(bo->base.resv, ticket);
if (ret == -EINTR)
return -ERESTARTSYS;
return ret;
}
/**
* ttm_bo_reserve_slowpath:
* @bo: A pointer to a struct ttm_buffer_object.
* @interruptible: Sleep interruptible if waiting.
* @sequence: Set (@bo)->sequence to this value after lock
*
* This is called after ttm_bo_reserve returns -EAGAIN and we backed off
* from all our other reservations. Because there are no other reservations
* held by us, this function cannot deadlock any more.
*/
static inline int ttm_bo_reserve_slowpath(struct ttm_buffer_object *bo,
bool interruptible,
struct ww_acquire_ctx *ticket)
{
if (interruptible) {
int ret = dma_resv_lock_slow_interruptible(bo->base.resv,
ticket);
if (ret == -EINTR)
ret = -ERESTARTSYS;
return ret;
}
dma_resv_lock_slow(bo->base.resv, ticket);
return 0;
}
static inline void
ttm_bo_move_to_lru_tail_unlocked(struct ttm_buffer_object *bo)
{
spin_lock(&bo->bdev->lru_lock);
ttm_bo_move_to_lru_tail(bo);
spin_unlock(&bo->bdev->lru_lock);
}
static inline void ttm_bo_assign_mem(struct ttm_buffer_object *bo,
struct ttm_resource *new_mem)
{
WARN_ON(bo->resource);
bo->resource = new_mem;
}
/**
* ttm_bo_move_null = assign memory for a buffer object.
* @bo: The bo to assign the memory to
* @new_mem: The memory to be assigned.
*
* Assign the memory from new_mem to the memory of the buffer object bo.
*/
static inline void ttm_bo_move_null(struct ttm_buffer_object *bo,
struct ttm_resource *new_mem)
{
ttm_resource_free(bo, &bo->resource);
ttm_bo_assign_mem(bo, new_mem);
}
/**
* ttm_bo_unreserve
*
* @bo: A pointer to a struct ttm_buffer_object.
*
* Unreserve a previous reservation of @bo.
*/
static inline void ttm_bo_unreserve(struct ttm_buffer_object *bo)
{
ttm_bo_move_to_lru_tail_unlocked(bo);
dma_resv_unlock(bo->base.resv);
}
/*
* ttm_bo_util.c
*/
int ttm_mem_io_reserve(struct ttm_device *bdev,
struct ttm_resource *mem);
void ttm_mem_io_free(struct ttm_device *bdev,
struct ttm_resource *mem);
/**
* ttm_bo_move_memcpy
*
* @bo: A pointer to a struct ttm_buffer_object.
* @interruptible: Sleep interruptible if waiting.
* @no_wait_gpu: Return immediately if the GPU is busy.
* @new_mem: struct ttm_resource indicating where to move.
*
* Fallback move function for a mappable buffer object in mappable memory.
* The function will, if successful,
* free any old aperture space, and set (@new_mem)->mm_node to NULL,
* and update the (@bo)->mem placement flags. If unsuccessful, the old
* data remains untouched, and it's up to the caller to free the
* memory space indicated by @new_mem.
* Returns:
* !0: Failure.
*/
int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,
struct ttm_operation_ctx *ctx,
struct ttm_resource *new_mem);
/**
* ttm_bo_move_accel_cleanup.
*
* @bo: A pointer to a struct ttm_buffer_object.
* @fence: A fence object that signals when moving is complete.
* @evict: This is an evict move. Don't return until the buffer is idle.
* @pipeline: evictions are to be pipelined.
* @new_mem: struct ttm_resource indicating where to move.
*
* Accelerated move function to be called when an accelerated move
* has been scheduled. The function will create a new temporary buffer object
* representing the old placement, and put the sync object on both buffer
* objects. After that the newly created buffer object is unref'd to be
* destroyed when the move is complete. This will help pipeline
* buffer moves.
*/
int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo,
struct dma_fence *fence, bool evict,
bool pipeline,
struct ttm_resource *new_mem);
/**
* ttm_bo_move_sync_cleanup.
*
* @bo: A pointer to a struct ttm_buffer_object.
* @new_mem: struct ttm_resource indicating where to move.
*
* Special case of ttm_bo_move_accel_cleanup where the bo is guaranteed
* by the caller to be idle. Typically used after memcpy buffer moves.
*/
void ttm_bo_move_sync_cleanup(struct ttm_buffer_object *bo,
struct ttm_resource *new_mem);
/**
* ttm_bo_pipeline_gutting.
*
* @bo: A pointer to a struct ttm_buffer_object.
*
* Pipelined gutting a BO of its backing store.
*/
int ttm_bo_pipeline_gutting(struct ttm_buffer_object *bo);
/**
* ttm_io_prot
*
* bo: ttm buffer object
* res: ttm resource object
* @tmp: Page protection flag for a normal, cached mapping.
*
* Utility function that returns the pgprot_t that should be used for
* setting up a PTE with the caching model indicated by @c_state.
*/
pgprot_t ttm_io_prot(struct ttm_buffer_object *bo, struct ttm_resource *res,
pgprot_t tmp);
/**
* ttm_bo_tt_bind
*
* Bind the object tt to a memory resource.
*/
int ttm_bo_tt_bind(struct ttm_buffer_object *bo, struct ttm_resource *mem);
/**
* ttm_bo_tt_destroy.
*/
void ttm_bo_tt_destroy(struct ttm_buffer_object *bo);
void ttm_move_memcpy(bool clear,
u32 num_pages,
struct ttm_kmap_iter *dst_iter,
struct ttm_kmap_iter *src_iter);
struct ttm_kmap_iter *
ttm_kmap_iter_iomap_init(struct ttm_kmap_iter_iomap *iter_io,
struct io_mapping *iomap,
struct sg_table *st,
resource_size_t start);
#endif

4
include/drm/ttm/ttm_execbuf_util.h
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@ -33,7 +33,9 @@
#include <linux/list.h>
#include "ttm_bo_api.h"
struct ww_acquire_ctx;
struct dma_fence;
struct ttm_buffer_object;
/**
* struct ttm_validate_buffer