This adds the infrastructure for an execution context for GEM buffers which is similar to the existinc TTMs execbuf util and intended to replace it in the long term.

The basic functionality is that we abstracts the necessary loop to lock many different GEM buffers with automated deadlock and duplicate handling.

v2: drop xarray and use dynamic resized array instead, the locking overhead is unecessary and measureable.

Signed-off-by: Christian König christian.koenig@amd.com --- Documentation/gpu/drm-mm.rst | 12 ++ drivers/gpu/drm/Kconfig | 7 + drivers/gpu/drm/Makefile | 2 + drivers/gpu/drm/drm_exec.c | 295 +++++++++++++++++++++++++++++++++++ include/drm/drm_exec.h | 144 +++++++++++++++++ 5 files changed, 460 insertions(+) create mode 100644 drivers/gpu/drm/drm_exec.c create mode 100644 include/drm/drm_exec.h

diff --git a/Documentation/gpu/drm-mm.rst b/Documentation/gpu/drm-mm.rst index f32ccce5722d..bf7dd2a78e9b 100644 --- a/Documentation/gpu/drm-mm.rst +++ b/Documentation/gpu/drm-mm.rst @@ -493,6 +493,18 @@ DRM Sync Objects .. kernel-doc:: drivers/gpu/drm/drm_syncobj.c :export:

+DRM Execution context +===================== + +.. kernel-doc:: drivers/gpu/drm/drm_exec.c + :doc: Overview + +.. kernel-doc:: include/drm/drm_exec.h + :internal: + +.. kernel-doc:: drivers/gpu/drm/drm_exec.c + :export: + GPU Scheduler =============

diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index e88c497fa010..1b35c10df263 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -179,6 +179,12 @@ config DRM_TTM GPU memory types. Will be enabled automatically if a device driver uses it.

+config DRM_EXEC + tristate + depends on DRM + help + Execution context for command submissions + config DRM_BUDDY tristate depends on DRM @@ -252,6 +258,7 @@ config DRM_AMDGPU select DRM_SCHED select DRM_TTM select DRM_TTM_HELPER + select DRM_EXEC select POWER_SUPPLY select HWMON select BACKLIGHT_CLASS_DEVICE diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile index 15fe3163f822..ee8573b683f3 100644 --- a/drivers/gpu/drm/Makefile +++ b/drivers/gpu/drm/Makefile @@ -37,6 +37,8 @@ obj-$(CONFIG_DRM_PANEL_ORIENTATION_QUIRKS) += drm_panel_orientation_quirks.o # # Memory-management helpers # +# +obj-$(CONFIG_DRM_EXEC) += drm_exec.o

obj-$(CONFIG_DRM_BUDDY) += drm_buddy.o

diff --git a/drivers/gpu/drm/drm_exec.c b/drivers/gpu/drm/drm_exec.c new file mode 100644 index 000000000000..ed2106c22786 --- /dev/null +++ b/drivers/gpu/drm/drm_exec.c @@ -0,0 +1,295 @@ +/* SPDX-License-Identifier: GPL-2.0 OR MIT */ + +#include <drm/drm_exec.h> +#include <drm/drm_gem.h> +#include <linux/dma-resv.h> + +/** + * DOC: Overview + * + * This component mainly abstracts the retry loop necessary for locking + * multiple GEM objects while preparing hardware operations (e.g. command + * submissions, page table updates etc..). + * + * If a contention is detected while locking a GEM object the cleanup procedure + * unlocks all previously locked GEM objects and locks the contended one first + * before locking any further objects. + * + * After an object is locked fences slots can optionally be reserved on the + * dma_resv object inside the GEM object. + * + * A typical usage pattern should look like this:: + * + * struct drm_gem_object *obj; + * struct drm_exec exec; + * unsigned long index; + * int ret; + * + * drm_exec_init(&exec, true); + * drm_exec_while_not_all_locked(&exec) { + * ret = drm_exec_prepare_obj(&exec, boA, 1); + * drm_exec_continue_on_contention(&exec); + * if (ret) + * goto error; + * + * ret = drm_exec_lock(&exec, boB, 1); + * drm_exec_continue_on_contention(&exec); + * if (ret) + * goto error; + * } + * + * drm_exec_for_each_locked_object(&exec, index, obj) { + * dma_resv_add_fence(obj->resv, fence, DMA_RESV_USAGE_READ); + * ... + * } + * drm_exec_fini(&exec); + * + * See struct dma_exec for more details. + */ + +/* Dummy value used to initially enter the retry loop */ +#define DRM_EXEC_DUMMY (void*)~0 + +/* Initialize the drm_exec_objects container */ +static void drm_exec_objects_init(struct drm_exec_objects *container) +{ + container->objects = kmalloc(PAGE_SIZE, GFP_KERNEL); + + /* If allocation here fails, just delay that till the first use */ + container->max_objects = container->objects ? + PAGE_SIZE / sizeof(void *) : 0; + container->num_objects = 0; +} + +/* Cleanup the drm_exec_objects container */ +static void drm_exec_objects_fini(struct drm_exec_objects *container) +{ + kvfree(container->objects); +} + +/* Make sure we have enough room and add an object the container */ +static int drm_exec_objects_add(struct drm_exec_objects *container, + struct drm_gem_object *obj) +{ + if (unlikely(container->num_objects == container->max_objects)) { + size_t size = container->max_objects * sizeof(void *); + void *tmp; + + tmp = kvrealloc(container->objects, size, size + PAGE_SIZE, + GFP_KERNEL); + if (!tmp) + return -ENOMEM; + + container->objects = tmp; + container->max_objects += PAGE_SIZE / sizeof(void *); + } + drm_gem_object_get(obj); + container->objects[container->num_objects++] = obj; + return 0; +} + +/* Unlock all objects and drop references */ +static void drm_exec_unlock_all(struct drm_exec *exec) +{ + struct drm_gem_object *obj; + unsigned long index; + + drm_exec_for_each_duplicate_object(exec, index, obj) + drm_gem_object_put(obj); + + drm_exec_for_each_locked_object(exec, index, obj) { + dma_resv_unlock(obj->resv); + drm_gem_object_put(obj); + } +} + +/** + * drm_exec_init - initialize a drm_exec object + * @exec: the drm_exec object to initialize + * @interruptible: if locks should be acquired interruptible + * + * Initialize the object and make sure that we can track locked and duplicate + * objects. + */ +void drm_exec_init(struct drm_exec *exec, bool interruptible) +{ + exec->interruptible = interruptible; + drm_exec_objects_init(&exec->locked); + drm_exec_objects_init(&exec->duplicates); + exec->contended = DRM_EXEC_DUMMY; +} +EXPORT_SYMBOL(drm_exec_init); + +/** + * drm_exec_fini - finalize a drm_exec object + * @exec: the drm_exec object to finilize + * + * Unlock all locked objects, drop the references to objects and free all memory + * used for tracking the state. + */ +void drm_exec_fini(struct drm_exec *exec) +{ + drm_exec_unlock_all(exec); + drm_exec_objects_fini(&exec->locked); + drm_exec_objects_fini(&exec->duplicates); + if (exec->contended != DRM_EXEC_DUMMY) { + drm_gem_object_put(exec->contended); + ww_acquire_fini(&exec->ticket); + } +} +EXPORT_SYMBOL(drm_exec_fini); + +/** + * drm_exec_cleanup - cleanup when contention is detected + * @exec: the drm_exec object to cleanup + * + * Cleanup the current state and return true if we should stay inside the retry + * loop, false if there wasn't any contention detected and we can keep the + * objects locked. + */ +bool drm_exec_cleanup(struct drm_exec *exec) +{ + if (likely(!exec->contended)) { + ww_acquire_done(&exec->ticket); + return false; + } + + if (likely(exec->contended == DRM_EXEC_DUMMY)) { + exec->contended = NULL; + ww_acquire_init(&exec->ticket, &reservation_ww_class); + return true; + } + + drm_exec_unlock_all(exec); + exec->locked.num_objects = 0; + exec->duplicates.num_objects = 0; + return true; +} +EXPORT_SYMBOL(drm_exec_cleanup); + +/* Track the locked object in the xa and reserve fences */ +static int drm_exec_obj_locked(struct drm_exec_objects *container, + struct drm_gem_object *obj, + unsigned int num_fences) +{ + int ret; + + if (container) { + ret = drm_exec_objects_add(container, obj); + if (ret) + return ret; + } + + if (num_fences) { + ret = dma_resv_reserve_fences(obj->resv, num_fences); + if (ret) + goto error_erase; + } + + return 0; + +error_erase: + if (container) { + --container->num_objects; + drm_gem_object_put(obj); + } + return ret; +} + +/* Make sure the contended object is locked first */ +static int drm_exec_lock_contended(struct drm_exec *exec) +{ + struct drm_gem_object *obj = exec->contended; + int ret; + + if (likely(!obj)) + return 0; + + if (exec->interruptible) { + ret = dma_resv_lock_slow_interruptible(obj->resv, + &exec->ticket); + if (unlikely(ret)) + goto error_dropref; + } else { + dma_resv_lock_slow(obj->resv, &exec->ticket); + } + + ret = drm_exec_obj_locked(&exec->locked, obj, 0); + if (unlikely(ret)) + dma_resv_unlock(obj->resv); + +error_dropref: + /* Always cleanup the contention so that error handling can kick in */ + drm_gem_object_put(obj); + exec->contended = NULL; + return ret; +} + +/** + * drm_exec_prepare_obj - prepare a GEM object for use + * @exec: the drm_exec object with the state + * @obj: the GEM object to prepare + * @num_fences: how many fences to reserve + * + * Prepare a GEM object for use by locking it and reserving fence slots. All + * succesfully locked objects are put into the locked container. Duplicates + * detected as well and automatically moved into the duplicates container. + * + * Returns: -EDEADLK if a contention is detected, -ENOMEM when memory + * allocation failed and zero for success. + */ +int drm_exec_prepare_obj(struct drm_exec *exec, struct drm_gem_object *obj, + unsigned int num_fences) +{ + int ret; + + ret = drm_exec_lock_contended(exec); + if (unlikely(ret)) + return ret; + + if (exec->interruptible) + ret = dma_resv_lock_interruptible(obj->resv, &exec->ticket); + else + ret = dma_resv_lock(obj->resv, &exec->ticket); + + if (unlikely(ret == -EDEADLK)) { + drm_gem_object_get(obj); + exec->contended = obj; + return -EDEADLK; + } + + if (unlikely(ret == -EALREADY)) { + struct drm_exec_objects *container = &exec->duplicates; + + /* + * If this is the first locked GEM object it was most likely + * just contended. So don't add it to the duplicates, just + * reserve the fence slots. + */ + if (exec->locked.num_objects && exec->locked.objects[0] == obj) + container = NULL; + + ret = drm_exec_obj_locked(container, obj, num_fences); + if (ret) + return ret; + + } else if (unlikely(ret)) { + return ret; + + } else { + ret = drm_exec_obj_locked(&exec->locked, obj, num_fences); + if (ret) + goto error_unlock; + } + + drm_gem_object_get(obj); + return 0; + +error_unlock: + dma_resv_unlock(obj->resv); + return ret; +} +EXPORT_SYMBOL(drm_exec_prepare_obj); + +MODULE_DESCRIPTION("DRM execution context"); +MODULE_LICENSE("Dual MIT/GPL"); diff --git a/include/drm/drm_exec.h b/include/drm/drm_exec.h new file mode 100644 index 000000000000..f73981c6292e --- /dev/null +++ b/include/drm/drm_exec.h @@ -0,0 +1,144 @@ +/* SPDX-License-Identifier: GPL-2.0 OR MIT */ + +#ifndef __DRM_EXEC_H__ +#define __DRM_EXEC_H__ + +#include <linux/ww_mutex.h> + +struct drm_gem_object; + +/** + * struct drm_exec_objects - Container for GEM objects in a drm_exec + */ +struct drm_exec_objects { + unsigned int num_objects; + unsigned int max_objects; + struct drm_gem_object **objects; +}; + +/** + * drm_exec_objects_for_each - iterate over all the objects inside the container + */ +#define drm_exec_objects_for_each(array, index, obj) \ + for (index = 0, obj = (array)->objects[0]; \ + index < (array)->num_objects; \ + ++index, obj = (array)->objects[index]) + +/** + * struct drm_exec - Execution context + */ +struct drm_exec { + /** + * @interruptible: If locks should be taken interruptible + */ + bool interruptible; + + /** + * @ticket: WW ticket used for acquiring locks + */ + struct ww_acquire_ctx ticket; + + /** + * @locked: container for the locked GEM objects + */ + struct drm_exec_objects locked; + + /** + * @duplicates: container for the duplicated GEM objects + */ + struct drm_exec_objects duplicates; + + /** + * @contended: contended GEM object we backet of for. + */ + struct drm_gem_object *contended; +}; + +/** + * drm_exec_for_each_locked_object - iterate over all the locked objects + * @exec: drm_exec object + * @index: unsigned long index for the iteration + * @obj: the current GEM object + * + * Iterate over all the locked GEM objects inside the drm_exec object. + */ +#define drm_exec_for_each_locked_object(exec, index, obj) \ + drm_exec_objects_for_each(&(exec)->locked, index, obj) + +/** + * drm_exec_for_each_duplicate_object - iterate over all the duplicate objects + * @exec: drm_exec object + * @index: unsigned long index for the iteration + * @obj: the current GEM object + * + * Iterate over all the duplicate GEM objects inside the drm_exec object. + */ +#define drm_exec_for_each_duplicate_object(exec, index, obj) \ + drm_exec_objects_for_each(&(exec)->duplicates, index, obj) + +/** + * drm_exec_while_not_all_locked - loop until all GEM objects are prepared + * @exec: drm_exec object + * + * Core functionality of the drm_exec object. Loops until all GEM objects are + * prepared and no more contention exists. + * + * At the beginning of the loop it is guaranteed that no GEM object is locked. + */ +#define drm_exec_while_not_all_locked(exec) \ + while (drm_exec_cleanup(exec)) + +/** + * drm_exec_continue_on_contention - continue the loop when we need to cleanup + * @exec: drm_exec object + * + * Control flow helper to continue when a contention was detected and we need to + * clean up and re-start the loop to prepare all GEM objects. + */ +#define drm_exec_continue_on_contention(exec) \ + if (unlikely(drm_exec_is_contended(exec))) \ + continue + +/** + * drm_exec_break_on_contention - break a subordinal loop on contention + * @exec: drm_exec object + * + * Control flow helper to break a subordinal loop when a contention was detected + * and we need to clean up and re-start the loop to prepare all GEM objects. + */ +#define drm_exec_break_on_contention(exec) \ + if (unlikely(drm_exec_is_contended(exec))) \ + break + +/** + * drm_exec_is_contended - check for contention + * @exec: drm_exec object + * + * Returns true if the drm_exec object has run into some contention while + * locking a GEM object and needs to clean up. + */ +static inline bool drm_exec_is_contended(struct drm_exec *exec) +{ + return !!exec->contended; +} + +/** + * drm_exec_has_duplicates - check for duplicated GEM object + * @exec: drm_exec object + * + * Return true if the drm_exec object has encountered some already locked GEM + * objects while trying to lock them. This can happen if multiple GEM objects + * share the same underlying resv object. + */ +static inline bool drm_exec_has_duplicates(struct drm_exec *exec) +{ + return exec->duplicates.num_objects > 0; +} + +void drm_exec_init(struct drm_exec *exec, bool interruptible); +void drm_exec_fini(struct drm_exec *exec); +bool drm_exec_cleanup(struct drm_exec *exec); +int drm_exec_prepare_obj(struct drm_exec *exec, struct drm_gem_object *obj, + unsigned int num_fences); + +#endif

Avoids quite a bit of logic and kmalloc overhead.

Signed-off-by: Christian König christian.koenig@amd.com --- drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h | 5 +- .../gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 303 +++++++----------- drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 14 + drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h | 3 + drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 32 +- 5 files changed, 152 insertions(+), 205 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h index 4cb14c2fe53f..3f3a994c68e2 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h @@ -25,12 +25,12 @@ #ifndef AMDGPU_AMDKFD_H_INCLUDED #define AMDGPU_AMDKFD_H_INCLUDED

+#include <linux/list.h> #include <linux/types.h> #include <linux/mm.h> #include <linux/kthread.h> #include <linux/workqueue.h> #include <kgd_kfd_interface.h> -#include <drm/ttm/ttm_execbuf_util.h> #include "amdgpu_sync.h" #include "amdgpu_vm.h"

@@ -66,8 +66,7 @@ struct kgd_mem { struct dma_buf *dmabuf; struct list_head attachments; /* protected by amdkfd_process_info.lock */ - struct ttm_validate_buffer validate_list; - struct ttm_validate_buffer resv_list; + struct list_head validate_list; uint32_t domain; unsigned int mapped_to_gpu_memory; uint64_t va; diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c index 3dc5ab2764ff..64ac4f8f49be 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c @@ -25,6 +25,8 @@ #include <linux/sched/mm.h> #include <linux/sched/task.h>

+#include <drm/drm_exec.h> + #include "amdgpu_object.h" #include "amdgpu_gem.h" #include "amdgpu_vm.h" @@ -770,28 +772,19 @@ static void add_kgd_mem_to_kfd_bo_list(struct kgd_mem *mem, struct amdkfd_process_info *process_info, bool userptr) { - struct ttm_validate_buffer *entry = &mem->validate_list; - struct amdgpu_bo *bo = mem->bo; - - INIT_LIST_HEAD(&entry->head); - entry->num_shared = 1; - entry->bo = &bo->tbo; - mutex_lock(&process_info->lock); if (userptr) - list_add_tail(&entry->head, &process_info->userptr_valid_list); + list_add_tail(&mem->validate_list, + &process_info->userptr_valid_list); else - list_add_tail(&entry->head, &process_info->kfd_bo_list); + list_add_tail(&mem->validate_list, &process_info->kfd_bo_list); mutex_unlock(&process_info->lock); }

static void remove_kgd_mem_from_kfd_bo_list(struct kgd_mem *mem, struct amdkfd_process_info *process_info) { - struct ttm_validate_buffer *bo_list_entry; - - bo_list_entry = &mem->validate_list; mutex_lock(&process_info->lock); - list_del(&bo_list_entry->head); + list_del(&mem->validate_list); mutex_unlock(&process_info->lock); }

@@ -875,13 +868,12 @@ static int init_user_pages(struct kgd_mem *mem, uint64_t user_addr, * object can track VM updates. */ struct bo_vm_reservation_context { - struct amdgpu_bo_list_entry kfd_bo; /* BO list entry for the KFD BO */ - unsigned int n_vms; /* Number of VMs reserved */ - struct amdgpu_bo_list_entry *vm_pd; /* Array of VM BO list entries */ - struct ww_acquire_ctx ticket; /* Reservation ticket */ - struct list_head list, duplicates; /* BO lists */ - struct amdgpu_sync *sync; /* Pointer to sync object */ - bool reserved; /* Whether BOs are reserved */ + /* DRM execution context for the reservation */ + struct drm_exec exec; + /* Number of VMs reserved */ + unsigned int n_vms; + /* Pointer to sync object */ + struct amdgpu_sync *sync; };

enum bo_vm_match { @@ -905,35 +897,24 @@ static int reserve_bo_and_vm(struct kgd_mem *mem,

WARN_ON(!vm);

- ctx->reserved = false; ctx->n_vms = 1; ctx->sync = &mem->sync; - - INIT_LIST_HEAD(&ctx->list); - INIT_LIST_HEAD(&ctx->duplicates); - - ctx->vm_pd = kcalloc(ctx->n_vms, sizeof(*ctx->vm_pd), GFP_KERNEL); - if (!ctx->vm_pd) - return -ENOMEM; - - ctx->kfd_bo.priority = 0; - ctx->kfd_bo.tv.bo = &bo->tbo; - ctx->kfd_bo.tv.num_shared = 1; - list_add(&ctx->kfd_bo.tv.head, &ctx->list); - - amdgpu_vm_get_pd_bo(vm, &ctx->list, &ctx->vm_pd[0]); - - ret = ttm_eu_reserve_buffers(&ctx->ticket, &ctx->list, - false, &ctx->duplicates); - if (ret) { - pr_err("Failed to reserve buffers in ttm.\n"); - kfree(ctx->vm_pd); - ctx->vm_pd = NULL; - return ret; + drm_exec_init(&ctx->exec, true); + drm_exec_while_not_all_locked(&ctx->exec) { + ret = amdgpu_vm_lock_pd(vm, &ctx->exec); + if (likely(!ret)) + ret = drm_exec_prepare_obj(&ctx->exec, &bo->tbo.base, + 0); + drm_exec_continue_on_contention(&ctx->exec); + if (unlikely(ret)) + goto error; } - - ctx->reserved = true; return 0; + +error: + pr_err("Failed to reserve buffers in ttm.\n"); + drm_exec_fini(&ctx->exec); + return ret; }

/** @@ -950,63 +931,39 @@ static int reserve_bo_and_cond_vms(struct kgd_mem *mem, struct amdgpu_vm *vm, enum bo_vm_match map_type, struct bo_vm_reservation_context *ctx) { - struct amdgpu_bo *bo = mem->bo; struct kfd_mem_attachment *entry; - unsigned int i; + struct amdgpu_bo *bo = mem->bo; int ret;

- ctx->reserved = false; - ctx->n_vms = 0; - ctx->vm_pd = NULL; ctx->sync = &mem->sync; + drm_exec_init(&ctx->exec, true); + drm_exec_while_not_all_locked(&ctx->exec) { + ctx->n_vms = 0; + list_for_each_entry(entry, &mem->attachments, list) { + if ((vm && vm != entry->bo_va->base.vm) || + (entry->is_mapped != map_type + && map_type != BO_VM_ALL)) + continue;

- INIT_LIST_HEAD(&ctx->list); - INIT_LIST_HEAD(&ctx->duplicates); - - list_for_each_entry(entry, &mem->attachments, list) { - if ((vm && vm != entry->bo_va->base.vm) || - (entry->is_mapped != map_type - && map_type != BO_VM_ALL)) - continue; - - ctx->n_vms++; - } - - if (ctx->n_vms != 0) { - ctx->vm_pd = kcalloc(ctx->n_vms, sizeof(*ctx->vm_pd), - GFP_KERNEL); - if (!ctx->vm_pd) - return -ENOMEM; - } - - ctx->kfd_bo.priority = 0; - ctx->kfd_bo.tv.bo = &bo->tbo; - ctx->kfd_bo.tv.num_shared = 1; - list_add(&ctx->kfd_bo.tv.head, &ctx->list); - - i = 0; - list_for_each_entry(entry, &mem->attachments, list) { - if ((vm && vm != entry->bo_va->base.vm) || - (entry->is_mapped != map_type - && map_type != BO_VM_ALL)) - continue; - - amdgpu_vm_get_pd_bo(entry->bo_va->base.vm, &ctx->list, - &ctx->vm_pd[i]); - i++; - } + ret = amdgpu_vm_lock_pd(vm, &ctx->exec); + drm_exec_break_on_contention(&ctx->exec); + if (unlikely(ret)) + goto error; + ++ctx->n_vms; + } + drm_exec_continue_on_contention(&ctx->exec);

- ret = ttm_eu_reserve_buffers(&ctx->ticket, &ctx->list, - false, &ctx->duplicates); - if (ret) { - pr_err("Failed to reserve buffers in ttm.\n"); - kfree(ctx->vm_pd); - ctx->vm_pd = NULL; - return ret; + ret = drm_exec_prepare_obj(&ctx->exec, &bo->tbo.base, 1); + drm_exec_continue_on_contention(&ctx->exec); + if (unlikely(ret)) + goto error; } - - ctx->reserved = true; return 0; + +error: + pr_err("Failed to reserve buffers in ttm.\n"); + drm_exec_fini(&ctx->exec); + return ret; }

/** @@ -1027,15 +984,8 @@ static int unreserve_bo_and_vms(struct bo_vm_reservation_context *ctx, if (wait) ret = amdgpu_sync_wait(ctx->sync, intr);

- if (ctx->reserved) - ttm_eu_backoff_reservation(&ctx->ticket, &ctx->list); - kfree(ctx->vm_pd); - + drm_exec_fini(&ctx->exec); ctx->sync = NULL; - - ctx->reserved = false; - ctx->vm_pd = NULL; - return ret; }

@@ -1616,7 +1566,6 @@ int amdgpu_amdkfd_gpuvm_free_memory_of_gpu( unsigned long bo_size = mem->bo->tbo.base.size; struct kfd_mem_attachment *entry, *tmp; struct bo_vm_reservation_context ctx; - struct ttm_validate_buffer *bo_list_entry; unsigned int mapped_to_gpu_memory; int ret; bool is_imported = false; @@ -1644,9 +1593,8 @@ int amdgpu_amdkfd_gpuvm_free_memory_of_gpu( }

/* Make sure restore workers don't access the BO any more */ - bo_list_entry = &mem->validate_list; mutex_lock(&process_info->lock); - list_del(&bo_list_entry->head); + list_del(&mem->validate_list); mutex_unlock(&process_info->lock);

/* No more MMU notifiers */ @@ -1945,7 +1893,7 @@ int amdgpu_amdkfd_gpuvm_map_gtt_bo_to_kernel(struct amdgpu_device *adev,

amdgpu_amdkfd_remove_eviction_fence( bo, mem->process_info->eviction_fence); - list_del_init(&mem->validate_list.head); + list_del_init(&mem->validate_list);

if (size) *size = amdgpu_bo_size(bo); @@ -2107,7 +2055,7 @@ static int update_invalid_user_pages(struct amdkfd_process_info *process_info, */ list_for_each_entry_safe(mem, tmp_mem, &process_info->userptr_valid_list, - validate_list.head) { + validate_list) { if (!atomic_read(&mem->invalid)) continue; /* BO is still valid */

@@ -2124,7 +2072,7 @@ static int update_invalid_user_pages(struct amdkfd_process_info *process_info, return -EAGAIN; }

- list_move_tail(&mem->validate_list.head, + list_move_tail(&mem->validate_list, &process_info->userptr_inval_list); }

@@ -2133,7 +2081,7 @@ static int update_invalid_user_pages(struct amdkfd_process_info *process_info,

/* Go through userptr_inval_list and update any invalid user_pages */ list_for_each_entry(mem, &process_info->userptr_inval_list, - validate_list.head) { + validate_list) { invalid = atomic_read(&mem->invalid); if (!invalid) /* BO hasn't been invalidated since the last @@ -2184,50 +2132,44 @@ static int update_invalid_user_pages(struct amdkfd_process_info *process_info, */ static int validate_invalid_user_pages(struct amdkfd_process_info *process_info) { - struct amdgpu_bo_list_entry *pd_bo_list_entries; - struct list_head resv_list, duplicates; - struct ww_acquire_ctx ticket; + struct ttm_operation_ctx ctx = { false, false }; struct amdgpu_sync sync; + struct drm_exec exec;

struct amdgpu_vm *peer_vm; struct kgd_mem *mem, *tmp_mem; struct amdgpu_bo *bo; - struct ttm_operation_ctx ctx = { false, false }; - int i, ret; - - pd_bo_list_entries = kcalloc(process_info->n_vms, - sizeof(struct amdgpu_bo_list_entry), - GFP_KERNEL); - if (!pd_bo_list_entries) { - pr_err("%s: Failed to allocate PD BO list entries\n", __func__); - ret = -ENOMEM; - goto out_no_mem; - } - - INIT_LIST_HEAD(&resv_list); - INIT_LIST_HEAD(&duplicates); + int ret;

- /* Get all the page directory BOs that need to be reserved */ - i = 0; - list_for_each_entry(peer_vm, &process_info->vm_list_head, - vm_list_node) - amdgpu_vm_get_pd_bo(peer_vm, &resv_list, - &pd_bo_list_entries[i++]); - /* Add the userptr_inval_list entries to resv_list */ - list_for_each_entry(mem, &process_info->userptr_inval_list, - validate_list.head) { - list_add_tail(&mem->resv_list.head, &resv_list); - mem->resv_list.bo = mem->validate_list.bo; - mem->resv_list.num_shared = mem->validate_list.num_shared; - } + amdgpu_sync_create(&sync);

+ drm_exec_init(&exec, true); /* Reserve all BOs and page tables for validation */ - ret = ttm_eu_reserve_buffers(&ticket, &resv_list, false, &duplicates); - WARN(!list_empty(&duplicates), "Duplicates should be empty"); - if (ret) - goto out_free; + drm_exec_while_not_all_locked(&exec) { + /* Reserve all the page directories */ + list_for_each_entry(peer_vm, &process_info->vm_list_head, + vm_list_node) { + ret = amdgpu_vm_lock_pd(peer_vm, &exec); + drm_exec_break_on_contention(&exec); + if (unlikely(ret)) + goto unreserve_out; + } + drm_exec_continue_on_contention(&exec);

- amdgpu_sync_create(&sync); + /* Reserve the userptr_inval_list entries to resv_list */ + list_for_each_entry(mem, &process_info->userptr_inval_list, + validate_list) { + struct drm_gem_object *gobj; + + gobj = &mem->bo->tbo.base; + ret = drm_exec_prepare_obj(&exec, gobj, 1); + drm_exec_break_on_contention(&exec); + if (unlikely(ret)) + goto unreserve_out; + } + drm_exec_continue_on_contention(&exec); + } + WARN(!drm_exec_has_duplicates(&exec), "Duplicates should be empty");

ret = process_validate_vms(process_info); if (ret) @@ -2236,7 +2178,7 @@ static int validate_invalid_user_pages(struct amdkfd_process_info *process_info) /* Validate BOs and update GPUVM page tables */ list_for_each_entry_safe(mem, tmp_mem, &process_info->userptr_inval_list, - validate_list.head) { + validate_list) { struct kfd_mem_attachment *attachment;

bo = mem->bo; @@ -2251,7 +2193,7 @@ static int validate_invalid_user_pages(struct amdkfd_process_info *process_info) } }

- list_move_tail(&mem->validate_list.head, + list_move_tail(&mem->validate_list, &process_info->userptr_valid_list);

/* Update mapping. If the BO was not validated @@ -2279,12 +2221,9 @@ static int validate_invalid_user_pages(struct amdkfd_process_info *process_info) ret = process_update_pds(process_info, &sync);

unreserve_out: - ttm_eu_backoff_reservation(&ticket, &resv_list); + drm_exec_fini(&exec); amdgpu_sync_wait(&sync, false); amdgpu_sync_free(&sync); -out_free: - kfree(pd_bo_list_entries); -out_no_mem:

return ret; } @@ -2381,50 +2320,46 @@ static void amdgpu_amdkfd_restore_userptr_worker(struct work_struct *work) */ int amdgpu_amdkfd_gpuvm_restore_process_bos(void *info, struct dma_fence **ef) { - struct amdgpu_bo_list_entry *pd_bo_list; struct amdkfd_process_info *process_info = info; struct amdgpu_vm *peer_vm; struct kgd_mem *mem; - struct bo_vm_reservation_context ctx; struct amdgpu_amdkfd_fence *new_fence; - int ret = 0, i; struct list_head duplicate_save; struct amdgpu_sync sync_obj; unsigned long failed_size = 0; unsigned long total_size = 0; + struct drm_exec exec; + int ret;

INIT_LIST_HEAD(&duplicate_save); - INIT_LIST_HEAD(&ctx.list); - INIT_LIST_HEAD(&ctx.duplicates);

- pd_bo_list = kcalloc(process_info->n_vms, - sizeof(struct amdgpu_bo_list_entry), - GFP_KERNEL); - if (!pd_bo_list) - return -ENOMEM; - - i = 0; mutex_lock(&process_info->lock); - list_for_each_entry(peer_vm, &process_info->vm_list_head, - vm_list_node) - amdgpu_vm_get_pd_bo(peer_vm, &ctx.list, &pd_bo_list[i++]);

- /* Reserve all BOs and page tables/directory. Add all BOs from - * kfd_bo_list to ctx.list - */ - list_for_each_entry(mem, &process_info->kfd_bo_list, - validate_list.head) { - - list_add_tail(&mem->resv_list.head, &ctx.list); - mem->resv_list.bo = mem->validate_list.bo; - mem->resv_list.num_shared = mem->validate_list.num_shared; - } + drm_exec_init(&exec, false); + drm_exec_while_not_all_locked(&exec) { + list_for_each_entry(peer_vm, &process_info->vm_list_head, + vm_list_node) { + ret = amdgpu_vm_lock_pd(peer_vm, &exec); + drm_exec_break_on_contention(&exec); + if (unlikely(ret)) + goto ttm_reserve_fail; + } + drm_exec_continue_on_contention(&exec);

- ret = ttm_eu_reserve_buffers(&ctx.ticket, &ctx.list, - false, &duplicate_save); - if (ret) { - pr_debug("Memory eviction: TTM Reserve Failed. Try again\n"); - goto ttm_reserve_fail; + /* Reserve all BOs and page tables/directory. Add all BOs from + * kfd_bo_list to ctx.list + */ + list_for_each_entry(mem, &process_info->kfd_bo_list, + validate_list) { + struct drm_gem_object *gobj; + + gobj = &mem->bo->tbo.base; + ret = drm_exec_prepare_obj(&exec, gobj, 1); + drm_exec_break_on_contention(&exec); + if (unlikely(ret)) + goto ttm_reserve_fail; + } + drm_exec_continue_on_contention(&exec); }

amdgpu_sync_create(&sync_obj); @@ -2442,7 +2377,7 @@ int amdgpu_amdkfd_gpuvm_restore_process_bos(void *info, struct dma_fence **ef)

/* Validate BOs and map them to GPUVM (update VM page tables). */ list_for_each_entry(mem, &process_info->kfd_bo_list, - validate_list.head) { + validate_list) {

struct amdgpu_bo *bo = mem->bo; uint32_t domain = mem->domain; @@ -2515,8 +2450,7 @@ int amdgpu_amdkfd_gpuvm_restore_process_bos(void *info, struct dma_fence **ef) *ef = dma_fence_get(&new_fence->base);

/* Attach new eviction fence to all BOs */ - list_for_each_entry(mem, &process_info->kfd_bo_list, - validate_list.head) + list_for_each_entry(mem, &process_info->kfd_bo_list, validate_list) amdgpu_bo_fence(mem->bo, &process_info->eviction_fence->base, true);

@@ -2529,11 +2463,10 @@ int amdgpu_amdkfd_gpuvm_restore_process_bos(void *info, struct dma_fence **ef) }

validate_map_fail: - ttm_eu_backoff_reservation(&ctx.ticket, &ctx.list); amdgpu_sync_free(&sync_obj); ttm_reserve_fail: + drm_exec_fini(&exec); mutex_unlock(&process_info->lock); - kfree(pd_bo_list); return ret; }

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index 5277c10d901d..c82c580f1df5 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -33,6 +33,7 @@

#include <drm/amdgpu_drm.h> #include <drm/drm_drv.h> +#include <drm/drm_exec.h> #include "amdgpu.h" #include "amdgpu_trace.h" #include "amdgpu_amdkfd.h" @@ -639,6 +640,19 @@ void amdgpu_vm_get_pd_bo(struct amdgpu_vm *vm, list_add(&entry->tv.head, validated); }

+/** + * amdgpu_vm_lock_pd - lock PD in drm_exec + * + * @vm: vm providing the BOs + * @exec: drm execution context + * + * Lock the VM root PD in the DRM execution context. + */ +int amdgpu_vm_lock_pd(struct amdgpu_vm *vm, struct drm_exec *exec) +{ + return drm_exec_prepare_obj(exec, &vm->root.bo->tbo.base, 4); +} + /** * amdgpu_vm_move_to_lru_tail - move all BOs to the end of LRU * diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h index bd7892482bbf..15d26f442e70 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h @@ -36,6 +36,8 @@ #include "amdgpu_ring.h" #include "amdgpu_ids.h"

+struct drm_exec; + struct amdgpu_bo_va; struct amdgpu_job; struct amdgpu_bo_list_entry; @@ -383,6 +385,7 @@ void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm); void amdgpu_vm_get_pd_bo(struct amdgpu_vm *vm, struct list_head *validated, struct amdgpu_bo_list_entry *entry); +int amdgpu_vm_lock_pd(struct amdgpu_vm *vm, struct drm_exec *exec); bool amdgpu_vm_ready(struct amdgpu_vm *vm); int amdgpu_vm_validate_pt_bos(struct amdgpu_device *adev, struct amdgpu_vm *vm, int (*callback)(void *p, struct amdgpu_bo *bo), diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c index b3fc3e958227..b5cb234e9f77 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c @@ -23,6 +23,8 @@

#include <linux/types.h> #include <linux/sched/task.h> +#include <drm/drm_exec.h> + #include "amdgpu_sync.h" #include "amdgpu_object.h" #include "amdgpu_vm.h" @@ -1373,9 +1375,7 @@ struct svm_validate_context { struct svm_range *prange; bool intr; unsigned long bitmap[MAX_GPU_INSTANCE]; - struct ttm_validate_buffer tv[MAX_GPU_INSTANCE]; - struct list_head validate_list; - struct ww_acquire_ctx ticket; + struct drm_exec exec; };

static int svm_range_reserve_bos(struct svm_validate_context *ctx) @@ -1385,25 +1385,23 @@ static int svm_range_reserve_bos(struct svm_validate_context *ctx) uint32_t gpuidx; int r;

- INIT_LIST_HEAD(&ctx->validate_list); + drm_exec_init(&ctx->exec, true); for_each_set_bit(gpuidx, ctx->bitmap, MAX_GPU_INSTANCE) { pdd = kfd_process_device_from_gpuidx(ctx->process, gpuidx); if (!pdd) { pr_debug("failed to find device idx %d\n", gpuidx); - return -EINVAL; + r = -EINVAL; + goto unreserve_out; } vm = drm_priv_to_vm(pdd->drm_priv);

- ctx->tv[gpuidx].bo = &vm->root.bo->tbo; - ctx->tv[gpuidx].num_shared = 4; - list_add(&ctx->tv[gpuidx].head, &ctx->validate_list); - } - - r = ttm_eu_reserve_buffers(&ctx->ticket, &ctx->validate_list, - ctx->intr, NULL); - if (r) { - pr_debug("failed %d to reserve bo\n", r); - return r; + r = amdgpu_vm_lock_pd(vm, &ctx->exec); + if (unlikely(r == -EDEADLK)) + continue; + if (unlikely(r)) { + pr_debug("failed %d to reserve bo\n", r); + goto unreserve_out; + } }

for_each_set_bit(gpuidx, ctx->bitmap, MAX_GPU_INSTANCE) { @@ -1426,13 +1424,13 @@ static int svm_range_reserve_bos(struct svm_validate_context *ctx) return 0;

unreserve_out: - ttm_eu_backoff_reservation(&ctx->ticket, &ctx->validate_list); + drm_exec_fini(&ctx->exec); return r; }

static void svm_range_unreserve_bos(struct svm_validate_context *ctx) { - ttm_eu_backoff_reservation(&ctx->ticket, &ctx->validate_list); + drm_exec_fini(&ctx->exec); }

static void *kfd_svm_page_owner(struct kfd_process *p, int32_t gpuidx)

Start using the new component here as well.

Signed-off-by: Christian König christian.koenig@amd.com --- drivers/gpu/drm/amd/amdgpu/amdgpu_csa.c | 42 ++++++-------- drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 77 +++++++++++-------------- 2 files changed, 53 insertions(+), 66 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_csa.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_csa.c index c6d4d41c4393..ea434c8de047 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_csa.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_csa.c @@ -22,6 +22,8 @@ * * Author: Monk.liu@amd.com */

+#include <drm/drm_exec.h> + #include "amdgpu.h"

uint64_t amdgpu_csa_vaddr(struct amdgpu_device *adev) @@ -65,31 +67,25 @@ int amdgpu_map_static_csa(struct amdgpu_device *adev, struct amdgpu_vm *vm, struct amdgpu_bo *bo, struct amdgpu_bo_va **bo_va, uint64_t csa_addr, uint32_t size) { - struct ww_acquire_ctx ticket; - struct list_head list; - struct amdgpu_bo_list_entry pd; - struct ttm_validate_buffer csa_tv; + struct drm_exec exec; int r;

- INIT_LIST_HEAD(&list); - INIT_LIST_HEAD(&csa_tv.head); - csa_tv.bo = &bo->tbo; - csa_tv.num_shared = 1; - - list_add(&csa_tv.head, &list); - amdgpu_vm_get_pd_bo(vm, &list, &pd); - - r = ttm_eu_reserve_buffers(&ticket, &list, true, NULL); - if (r) { - DRM_ERROR("failed to reserve CSA,PD BOs: err=%d\n", r); - return r; + drm_exec_init(&exec, true); + drm_exec_while_not_all_locked(&exec) { + r = amdgpu_vm_lock_pd(vm, &exec); + if (likely(!r)) + r = drm_exec_prepare_obj(&exec, &bo->tbo.base, 0); + drm_exec_continue_on_contention(&exec); + if (unlikely(r)) { + DRM_ERROR("failed to reserve CSA,PD BOs: err=%d\n", r); + goto error; + } }

*bo_va = amdgpu_vm_bo_add(adev, vm, bo); if (!*bo_va) { - ttm_eu_backoff_reservation(&ticket, &list); - DRM_ERROR("failed to create bo_va for static CSA\n"); - return -ENOMEM; + r = -ENOMEM; + goto error; }

r = amdgpu_vm_bo_map(adev, *bo_va, csa_addr, 0, size, @@ -99,10 +95,10 @@ int amdgpu_map_static_csa(struct amdgpu_device *adev, struct amdgpu_vm *vm, if (r) { DRM_ERROR("failed to do bo_map on static CSA, err=%d\n", r); amdgpu_vm_bo_del(adev, *bo_va); - ttm_eu_backoff_reservation(&ticket, &list); - return r; + goto error; }

- ttm_eu_backoff_reservation(&ticket, &list); - return 0; +error: + drm_exec_fini(&exec); + return r; } diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c index 84a53758e18e..99d6d3ab452e 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c @@ -33,6 +33,7 @@

#include <drm/amdgpu_drm.h> #include <drm/drm_drv.h> +#include <drm/drm_exec.h> #include <drm/drm_gem_ttm_helper.h>

#include "amdgpu.h" @@ -195,29 +196,23 @@ static void amdgpu_gem_object_close(struct drm_gem_object *obj, struct amdgpu_fpriv *fpriv = file_priv->driver_priv; struct amdgpu_vm *vm = &fpriv->vm;

- struct amdgpu_bo_list_entry vm_pd; - struct list_head list, duplicates; struct dma_fence *fence = NULL; - struct ttm_validate_buffer tv; - struct ww_acquire_ctx ticket; struct amdgpu_bo_va *bo_va; + struct drm_exec exec; long r;

- INIT_LIST_HEAD(&list); - INIT_LIST_HEAD(&duplicates); - - tv.bo = &bo->tbo; - tv.num_shared = 2; - list_add(&tv.head, &list); - - amdgpu_vm_get_pd_bo(vm, &list, &vm_pd); - - r = ttm_eu_reserve_buffers(&ticket, &list, false, &duplicates); - if (r) { - dev_err(adev->dev, "leaking bo va because " - "we fail to reserve bo (%ld)\n", r); - return; + drm_exec_init(&exec, false); + drm_exec_while_not_all_locked(&exec) { + r = drm_exec_prepare_obj(&exec, &bo->tbo.base, 0); + if (likely(!r)) + r = amdgpu_vm_lock_pd(vm, &exec); + drm_exec_continue_on_contention(&exec); + if (unlikely(r)) { + dev_err(adev->dev, "leaking bo va (%ld)\n", r); + goto out_unlock; + } } + bo_va = amdgpu_vm_bo_find(vm, bo); if (!bo_va || --bo_va->ref_count) goto out_unlock; @@ -227,6 +222,9 @@ static void amdgpu_gem_object_close(struct drm_gem_object *obj, goto out_unlock;

r = amdgpu_vm_clear_freed(adev, vm, &fence); + if (unlikely(r < 0)) + dev_err(adev->dev, "failed to clear page " + "tables on GEM object close (%ld)\n", r); if (r || !fence) goto out_unlock;

@@ -234,10 +232,7 @@ static void amdgpu_gem_object_close(struct drm_gem_object *obj, dma_fence_put(fence);

out_unlock: - if (unlikely(r < 0)) - dev_err(adev->dev, "failed to clear page " - "tables on GEM object close (%ld)\n", r); - ttm_eu_backoff_reservation(&ticket, &list); + drm_exec_fini(&exec); }

static int amdgpu_gem_object_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma) @@ -668,10 +663,7 @@ int amdgpu_gem_va_ioctl(struct drm_device *dev, void *data, struct amdgpu_fpriv *fpriv = filp->driver_priv; struct amdgpu_bo *abo; struct amdgpu_bo_va *bo_va; - struct amdgpu_bo_list_entry vm_pd; - struct ttm_validate_buffer tv; - struct ww_acquire_ctx ticket; - struct list_head list, duplicates; + struct drm_exec exec; uint64_t va_flags; uint64_t vm_size; int r = 0; @@ -721,36 +713,37 @@ int amdgpu_gem_va_ioctl(struct drm_device *dev, void *data, return -EINVAL; }

- INIT_LIST_HEAD(&list); - INIT_LIST_HEAD(&duplicates); if ((args->operation != AMDGPU_VA_OP_CLEAR) && !(args->flags & AMDGPU_VM_PAGE_PRT)) { gobj = drm_gem_object_lookup(filp, args->handle); if (gobj == NULL) return -ENOENT; abo = gem_to_amdgpu_bo(gobj); - tv.bo = &abo->tbo; - if (abo->flags & AMDGPU_GEM_CREATE_VM_ALWAYS_VALID) - tv.num_shared = 1; - else - tv.num_shared = 0; - list_add(&tv.head, &list); } else { gobj = NULL; abo = NULL; }

- amdgpu_vm_get_pd_bo(&fpriv->vm, &list, &vm_pd); + drm_exec_init(&exec, true); + drm_exec_while_not_all_locked(&exec) { + if (gobj) { + r = drm_exec_prepare_obj(&exec, gobj, 0); + drm_exec_continue_on_contention(&exec); + if (unlikely(r)) + goto error; + }

- r = ttm_eu_reserve_buffers(&ticket, &list, true, &duplicates); - if (r) - goto error_unref; + r = amdgpu_vm_lock_pd(&fpriv->vm, &exec); + drm_exec_continue_on_contention(&exec); + if (unlikely(r)) + goto error; + }

if (abo) { bo_va = amdgpu_vm_bo_find(&fpriv->vm, abo); if (!bo_va) { r = -ENOENT; - goto error_backoff; + goto error; } } else if (args->operation != AMDGPU_VA_OP_CLEAR) { bo_va = fpriv->prt_va; @@ -787,10 +780,8 @@ int amdgpu_gem_va_ioctl(struct drm_device *dev, void *data, amdgpu_gem_va_update_vm(adev, &fpriv->vm, bo_va, args->operation);

-error_backoff: - ttm_eu_backoff_reservation(&ticket, &list); - -error_unref: +error: + drm_exec_fini(&exec); drm_gem_object_put(gobj); return r; }

Just a straightforward conversion without any optimization.

Signed-off-by: Christian König christian.koenig@amd.com --- drivers/gpu/drm/radeon/radeon.h | 7 ++-- drivers/gpu/drm/radeon/radeon_cs.c | 45 +++++++++++++------------- drivers/gpu/drm/radeon/radeon_gem.c | 40 +++++++++++++---------- drivers/gpu/drm/radeon/radeon_object.c | 25 +++++++------- drivers/gpu/drm/radeon/radeon_object.h | 2 +- drivers/gpu/drm/radeon/radeon_vm.c | 10 +++--- 6 files changed, 66 insertions(+), 63 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h index 08f83bf2c330..841b463a0bea 100644 --- a/drivers/gpu/drm/radeon/radeon.h +++ b/drivers/gpu/drm/radeon/radeon.h @@ -76,8 +76,8 @@ #include <drm/ttm/ttm_bo_api.h> #include <drm/ttm/ttm_bo_driver.h> #include <drm/ttm/ttm_placement.h> -#include <drm/ttm/ttm_execbuf_util.h>

+#include <drm/drm_exec.h> #include <drm/drm_gem.h>

#include "radeon_family.h" @@ -458,7 +458,8 @@ struct radeon_mman {

struct radeon_bo_list { struct radeon_bo *robj; - struct ttm_validate_buffer tv; + struct list_head list; + bool shared; uint64_t gpu_offset; unsigned preferred_domains; unsigned allowed_domains; @@ -1069,6 +1070,7 @@ struct radeon_cs_parser { struct radeon_bo_list *vm_bos; struct list_head validated; unsigned dma_reloc_idx; + struct drm_exec exec; /* indices of various chunks */ struct radeon_cs_chunk *chunk_ib; struct radeon_cs_chunk *chunk_relocs; @@ -1082,7 +1084,6 @@ struct radeon_cs_parser { u32 cs_flags; u32 ring; s32 priority; - struct ww_acquire_ctx ticket; };

static inline u32 radeon_get_ib_value(struct radeon_cs_parser *p, int idx) diff --git a/drivers/gpu/drm/radeon/radeon_cs.c b/drivers/gpu/drm/radeon/radeon_cs.c index 446f7bae54c4..50613a2f0c90 100644 --- a/drivers/gpu/drm/radeon/radeon_cs.c +++ b/drivers/gpu/drm/radeon/radeon_cs.c @@ -182,11 +182,8 @@ static int radeon_cs_parser_relocs(struct radeon_cs_parser *p) } }

- p->relocs[i].tv.bo = &p->relocs[i].robj->tbo; - p->relocs[i].tv.num_shared = !r->write_domain; - - radeon_cs_buckets_add(&buckets, &p->relocs[i].tv.head, - priority); + p->relocs[i].shared = !r->write_domain; + radeon_cs_buckets_add(&buckets, &p->relocs[i].list, priority); }

radeon_cs_buckets_get_list(&buckets, &p->validated); @@ -197,7 +194,7 @@ static int radeon_cs_parser_relocs(struct radeon_cs_parser *p) if (need_mmap_lock) mmap_read_lock(current->mm);

- r = radeon_bo_list_validate(p->rdev, &p->ticket, &p->validated, p->ring); + r = radeon_bo_list_validate(p->rdev, &p->exec, &p->validated, p->ring);

if (need_mmap_lock) mmap_read_unlock(current->mm); @@ -253,12 +250,11 @@ static int radeon_cs_sync_rings(struct radeon_cs_parser *p) struct radeon_bo_list *reloc; int r;

- list_for_each_entry(reloc, &p->validated, tv.head) { + list_for_each_entry(reloc, &p->validated, list) { struct dma_resv *resv;

resv = reloc->robj->tbo.base.resv; - r = radeon_sync_resv(p->rdev, &p->ib.sync, resv, - reloc->tv.num_shared); + r = radeon_sync_resv(p->rdev, &p->ib.sync, resv, reloc->shared); if (r) return r; } @@ -275,6 +271,7 @@ int radeon_cs_parser_init(struct radeon_cs_parser *p, void *data) s32 priority = 0;

INIT_LIST_HEAD(&p->validated); + drm_exec_init(&p->exec, true);

if (!cs->num_chunks) { return 0; @@ -396,8 +393,8 @@ int radeon_cs_parser_init(struct radeon_cs_parser *p, void *data) static int cmp_size_smaller_first(void *priv, const struct list_head *a, const struct list_head *b) { - struct radeon_bo_list *la = list_entry(a, struct radeon_bo_list, tv.head); - struct radeon_bo_list *lb = list_entry(b, struct radeon_bo_list, tv.head); + struct radeon_bo_list *la = list_entry(a, struct radeon_bo_list, list); + struct radeon_bo_list *lb = list_entry(b, struct radeon_bo_list, list);

/* Sort A before B if A is smaller. */ return (int)la->robj->tbo.resource->num_pages - @@ -413,11 +410,13 @@ static int cmp_size_smaller_first(void *priv, const struct list_head *a, * If error is set than unvalidate buffer, otherwise just free memory * used by parsing context. **/ -static void radeon_cs_parser_fini(struct radeon_cs_parser *parser, int error, bool backoff) +static void radeon_cs_parser_fini(struct radeon_cs_parser *parser, int error) { unsigned i;

if (!error) { + struct radeon_bo_list *reloc; + /* Sort the buffer list from the smallest to largest buffer, * which affects the order of buffers in the LRU list. * This assures that the smallest buffers are added first @@ -429,15 +428,17 @@ static void radeon_cs_parser_fini(struct radeon_cs_parser *parser, int error, bo * per frame under memory pressure. */ list_sort(NULL, &parser->validated, cmp_size_smaller_first); - - ttm_eu_fence_buffer_objects(&parser->ticket, - &parser->validated, - &parser->ib.fence->base); - } else if (backoff) { - ttm_eu_backoff_reservation(&parser->ticket, - &parser->validated); + list_for_each_entry(reloc, &parser->validated, list) { + dma_resv_add_fence(reloc->robj->tbo.base.resv, + &parser->ib.fence->base, + reloc->shared ? + DMA_RESV_USAGE_READ : + DMA_RESV_USAGE_WRITE); + } }

+ drm_exec_fini(&parser->exec); + if (parser->relocs != NULL) { for (i = 0; i < parser->nrelocs; i++) { struct radeon_bo *bo = parser->relocs[i].robj; @@ -689,7 +690,7 @@ int radeon_cs_ioctl(struct drm_device *dev, void *data, struct drm_file *filp) r = radeon_cs_parser_init(&parser, data); if (r) { DRM_ERROR("Failed to initialize parser !\n"); - radeon_cs_parser_fini(&parser, r, false); + radeon_cs_parser_fini(&parser, r); up_read(&rdev->exclusive_lock); r = radeon_cs_handle_lockup(rdev, r); return r; @@ -703,7 +704,7 @@ int radeon_cs_ioctl(struct drm_device *dev, void *data, struct drm_file *filp) }

if (r) { - radeon_cs_parser_fini(&parser, r, false); + radeon_cs_parser_fini(&parser, r); up_read(&rdev->exclusive_lock); r = radeon_cs_handle_lockup(rdev, r); return r; @@ -720,7 +721,7 @@ int radeon_cs_ioctl(struct drm_device *dev, void *data, struct drm_file *filp) goto out; } out: - radeon_cs_parser_fini(&parser, r, true); + radeon_cs_parser_fini(&parser, r); up_read(&rdev->exclusive_lock); r = radeon_cs_handle_lockup(rdev, r); return r; diff --git a/drivers/gpu/drm/radeon/radeon_gem.c b/drivers/gpu/drm/radeon/radeon_gem.c index 8c01a7f0e027..cd4540e1a306 100644 --- a/drivers/gpu/drm/radeon/radeon_gem.c +++ b/drivers/gpu/drm/radeon/radeon_gem.c @@ -625,33 +625,41 @@ int radeon_gem_get_tiling_ioctl(struct drm_device *dev, void *data, static void radeon_gem_va_update_vm(struct radeon_device *rdev, struct radeon_bo_va *bo_va) { - struct ttm_validate_buffer tv, *entry; - struct radeon_bo_list *vm_bos; - struct ww_acquire_ctx ticket; + struct radeon_bo_list *vm_bos, *entry; struct list_head list; + struct drm_exec exec; unsigned domain; int r;

INIT_LIST_HEAD(&list);

- tv.bo = &bo_va->bo->tbo; - tv.num_shared = 1; - list_add(&tv.head, &list); - vm_bos = radeon_vm_get_bos(rdev, bo_va->vm, &list); if (!vm_bos) return;

- r = ttm_eu_reserve_buffers(&ticket, &list, true, NULL); - if (r) - goto error_free; + drm_exec_init(&exec, true); + drm_exec_while_not_all_locked(&exec) { + list_for_each_entry(entry, &list, list) { + r = drm_exec_prepare_obj(&exec, &entry->robj->tbo.base, + 1); + drm_exec_break_on_contention(&exec); + if (unlikely(r)) + goto error_cleanup; + } + drm_exec_continue_on_contention(&exec);

- list_for_each_entry(entry, &list, head) { - domain = radeon_mem_type_to_domain(entry->bo->resource->mem_type); + r = drm_exec_prepare_obj(&exec, &bo_va->bo->tbo.base, 1); + drm_exec_continue_on_contention(&exec); + if (unlikely(r)) + goto error_cleanup; + } + + list_for_each_entry(entry, &list, list) { + domain = radeon_mem_type_to_domain(entry->robj->tbo.resource->mem_type); /* if anything is swapped out don't swap it in here, just abort and wait for the next CS */ if (domain == RADEON_GEM_DOMAIN_CPU) - goto error_unreserve; + goto error_cleanup; }

mutex_lock(&bo_va->vm->mutex); @@ -665,10 +673,8 @@ static void radeon_gem_va_update_vm(struct radeon_device *rdev, error_unlock: mutex_unlock(&bo_va->vm->mutex);

-error_unreserve: - ttm_eu_backoff_reservation(&ticket, &list); - -error_free: +error_cleanup: + drm_exec_fini(&exec); kvfree(vm_bos);

if (r && r != -ERESTARTSYS) diff --git a/drivers/gpu/drm/radeon/radeon_object.c b/drivers/gpu/drm/radeon/radeon_object.c index 6c4a6802ca96..7138d1a588d2 100644 --- a/drivers/gpu/drm/radeon/radeon_object.c +++ b/drivers/gpu/drm/radeon/radeon_object.c @@ -468,23 +468,26 @@ static u64 radeon_bo_get_threshold_for_moves(struct radeon_device *rdev) }

int radeon_bo_list_validate(struct radeon_device *rdev, - struct ww_acquire_ctx *ticket, + struct drm_exec *exec, struct list_head *head, int ring) { struct ttm_operation_ctx ctx = { true, false }; struct radeon_bo_list *lobj; - struct list_head duplicates; - int r; u64 bytes_moved = 0, initial_bytes_moved; u64 bytes_moved_threshold = radeon_bo_get_threshold_for_moves(rdev); + int r;

- INIT_LIST_HEAD(&duplicates); - r = ttm_eu_reserve_buffers(ticket, head, true, &duplicates); - if (unlikely(r != 0)) { - return r; + drm_exec_while_not_all_locked(exec) { + list_for_each_entry(lobj, head, list) { + r = drm_exec_prepare_obj(exec, &lobj->robj->tbo.base, + 1); + drm_exec_break_on_contention(exec); + if (unlikely(r)) + return r; + } }

- list_for_each_entry(lobj, head, tv.head) { + list_for_each_entry(lobj, head, list) { struct radeon_bo *bo = lobj->robj; if (!bo->tbo.pin_count) { u32 domain = lobj->preferred_domains; @@ -523,7 +526,6 @@ int radeon_bo_list_validate(struct radeon_device *rdev, domain = lobj->allowed_domains; goto retry; } - ttm_eu_backoff_reservation(ticket, head); return r; } } @@ -531,11 +533,6 @@ int radeon_bo_list_validate(struct radeon_device *rdev, lobj->tiling_flags = bo->tiling_flags; }

- list_for_each_entry(lobj, &duplicates, tv.head) { - lobj->gpu_offset = radeon_bo_gpu_offset(lobj->robj); - lobj->tiling_flags = lobj->robj->tiling_flags; - } - return 0; }

diff --git a/drivers/gpu/drm/radeon/radeon_object.h b/drivers/gpu/drm/radeon/radeon_object.h index 0a6ef49e990a..04c7c17e8287 100644 --- a/drivers/gpu/drm/radeon/radeon_object.h +++ b/drivers/gpu/drm/radeon/radeon_object.h @@ -152,7 +152,7 @@ extern void radeon_bo_force_delete(struct radeon_device *rdev); extern int radeon_bo_init(struct radeon_device *rdev); extern void radeon_bo_fini(struct radeon_device *rdev); extern int radeon_bo_list_validate(struct radeon_device *rdev, - struct ww_acquire_ctx *ticket, + struct drm_exec *exec, struct list_head *head, int ring); extern int radeon_bo_set_tiling_flags(struct radeon_bo *bo, u32 tiling_flags, u32 pitch); diff --git a/drivers/gpu/drm/radeon/radeon_vm.c b/drivers/gpu/drm/radeon/radeon_vm.c index 987cabbf1318..647c4a07d92a 100644 --- a/drivers/gpu/drm/radeon/radeon_vm.c +++ b/drivers/gpu/drm/radeon/radeon_vm.c @@ -142,10 +142,9 @@ struct radeon_bo_list *radeon_vm_get_bos(struct radeon_device *rdev, list[0].robj = vm->page_directory; list[0].preferred_domains = RADEON_GEM_DOMAIN_VRAM; list[0].allowed_domains = RADEON_GEM_DOMAIN_VRAM; - list[0].tv.bo = &vm->page_directory->tbo; - list[0].tv.num_shared = 1; + list[0].shared = true; list[0].tiling_flags = 0; - list_add(&list[0].tv.head, head); + list_add(&list[0].list, head);

for (i = 0, idx = 1; i <= vm->max_pde_used; i++) { if (!vm->page_tables[i].bo) @@ -154,10 +153,9 @@ struct radeon_bo_list *radeon_vm_get_bos(struct radeon_device *rdev, list[idx].robj = vm->page_tables[i].bo; list[idx].preferred_domains = RADEON_GEM_DOMAIN_VRAM; list[idx].allowed_domains = RADEON_GEM_DOMAIN_VRAM; - list[idx].tv.bo = &list[idx].robj->tbo; - list[idx].tv.num_shared = 1; + list[idx].shared = true; list[idx].tiling_flags = 0; - list_add(&list[idx++].tv.head, head); + list_add(&list[idx++].list, head); }

return list;

VMWGFX is the only remaining user of this and should probably moved over to drm_exec when it starts using GEM as well.

Signed-off-by: Christian König christian.koenig@amd.com --- drivers/gpu/drm/ttm/Makefile | 4 ++-- drivers/gpu/drm/vmwgfx/Makefile | 2 +- drivers/gpu/drm/{ttm => vmwgfx}/ttm_execbuf_util.c | 3 ++- .../drm/ttm => drivers/gpu/drm/vmwgfx}/ttm_execbuf_util.h | 2 +- drivers/gpu/drm/vmwgfx/vmwgfx_drv.h | 2 +- drivers/gpu/drm/vmwgfx/vmwgfx_validation.h | 2 +- 6 files changed, 8 insertions(+), 7 deletions(-) rename drivers/gpu/drm/{ttm => vmwgfx}/ttm_execbuf_util.c (99%) rename {include/drm/ttm => drivers/gpu/drm/vmwgfx}/ttm_execbuf_util.h (99%)

diff --git a/drivers/gpu/drm/ttm/Makefile b/drivers/gpu/drm/ttm/Makefile index f906b22959cf..b05a8477d0d0 100644 --- a/drivers/gpu/drm/ttm/Makefile +++ b/drivers/gpu/drm/ttm/Makefile @@ -3,8 +3,8 @@ # Makefile for the drm device driver. This driver provides support for the

ttm-y := ttm_tt.o ttm_bo.o ttm_bo_util.o ttm_bo_vm.o ttm_module.o \ - ttm_execbuf_util.o ttm_range_manager.o ttm_resource.o ttm_pool.o \ - ttm_device.o ttm_sys_manager.o + ttm_range_manager.o ttm_resource.o ttm_pool.o ttm_device.o \ + ttm_sys_manager.o ttm-$(CONFIG_AGP) += ttm_agp_backend.o

obj-$(CONFIG_DRM_TTM) += ttm.o diff --git a/drivers/gpu/drm/vmwgfx/Makefile b/drivers/gpu/drm/vmwgfx/Makefile index eee73b9aa404..c2c836103b23 100644 --- a/drivers/gpu/drm/vmwgfx/Makefile +++ b/drivers/gpu/drm/vmwgfx/Makefile @@ -1,6 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 vmwgfx-y := vmwgfx_execbuf.o vmwgfx_gmr.o vmwgfx_hashtab.o vmwgfx_kms.o vmwgfx_drv.o \ - vmwgfx_ioctl.o vmwgfx_resource.o vmwgfx_ttm_buffer.o \ + vmwgfx_ioctl.o vmwgfx_resource.o vmwgfx_ttm_buffer.o ttm_execbuf_util.o \ vmwgfx_cmd.o vmwgfx_irq.o vmwgfx_ldu.o vmwgfx_ttm_glue.o \ vmwgfx_overlay.o vmwgfx_gmrid_manager.o vmwgfx_fence.o \ vmwgfx_bo.o vmwgfx_scrn.o vmwgfx_context.o \ diff --git a/drivers/gpu/drm/ttm/ttm_execbuf_util.c b/drivers/gpu/drm/vmwgfx/ttm_execbuf_util.c similarity index 99% rename from drivers/gpu/drm/ttm/ttm_execbuf_util.c rename to drivers/gpu/drm/vmwgfx/ttm_execbuf_util.c index dbee34a058df..1030f263ba07 100644 --- a/drivers/gpu/drm/ttm/ttm_execbuf_util.c +++ b/drivers/gpu/drm/vmwgfx/ttm_execbuf_util.c @@ -26,13 +26,14 @@ * **************************************************************************/

-#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 "ttm_execbuf_util.h" + static void ttm_eu_backoff_reservation_reverse(struct list_head *list, struct ttm_validate_buffer *entry) { diff --git a/include/drm/ttm/ttm_execbuf_util.h b/drivers/gpu/drm/vmwgfx/ttm_execbuf_util.h similarity index 99% rename from include/drm/ttm/ttm_execbuf_util.h rename to drivers/gpu/drm/vmwgfx/ttm_execbuf_util.h index a99d7fdf2964..47553bf31c73 100644 --- a/include/drm/ttm/ttm_execbuf_util.h +++ b/drivers/gpu/drm/vmwgfx/ttm_execbuf_util.h @@ -33,7 +33,7 @@

#include <linux/list.h>

-#include "ttm_bo_api.h" +#include <drm/ttm/ttm_bo_api.h>

/** * struct ttm_validate_buffer diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h index be19aa6e1f13..cae306c60af9 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h @@ -37,8 +37,8 @@ #include <drm/drm_rect.h>

#include <drm/ttm/ttm_bo_driver.h> -#include <drm/ttm/ttm_execbuf_util.h>

+#include "ttm_execbuf_util.h" #include "ttm_object.h"

#include "vmwgfx_fence.h" diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_validation.h b/drivers/gpu/drm/vmwgfx/vmwgfx_validation.h index f21df053882b..3613a3d52528 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_validation.h +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_validation.h @@ -31,7 +31,7 @@ #include <linux/list.h> #include <linux/ww_mutex.h>

-#include <drm/ttm/ttm_execbuf_util.h> +#include "ttm_execbuf_util.h"

#include "vmwgfx_hashtab.h"