[Intel-xe] [PATCH v2 2/2] drm/xe: switch to using drm_exec
Francois Dugast
francois.dugast at intel.com
Thu Jul 13 13:17:11 UTC 2023
Replace the use of ttm_execbuf_util helpers with the drm_exec helpers.
v2:
- Call dma-resv locking functions directly in xe_bo_lock and
xe_vm_lock functions (Matthew Brost)
- Switch to execution context for GEM buffers v7 (Christian König)
- Use DRM_EXEC_INTERRUPTIBLE_WAIT
Signed-off-by: Francois Dugast <francois.dugast at intel.com>
---
drivers/gpu/drm/xe/Kconfig | 1 +
drivers/gpu/drm/xe/xe_bo.c | 29 +++-
drivers/gpu/drm/xe/xe_bo_types.h | 1 -
drivers/gpu/drm/xe/xe_exec.c | 30 +---
drivers/gpu/drm/xe/xe_gt_pagefault.c | 55 +-----
drivers/gpu/drm/xe/xe_vm.c | 246 +++++++++++++--------------
drivers/gpu/drm/xe/xe_vm.h | 32 ++--
7 files changed, 168 insertions(+), 226 deletions(-)
diff --git a/drivers/gpu/drm/xe/Kconfig b/drivers/gpu/drm/xe/Kconfig
index d44794f99338..b739faa401d3 100644
--- a/drivers/gpu/drm/xe/Kconfig
+++ b/drivers/gpu/drm/xe/Kconfig
@@ -8,6 +8,7 @@ config DRM_XE
select SHMEM
select TMPFS
select DRM_BUDDY
+ select DRM_EXEC
select DRM_KMS_HELPER
select DRM_PANEL
select DRM_SUBALLOC_HELPER
diff --git a/drivers/gpu/drm/xe/xe_bo.c b/drivers/gpu/drm/xe/xe_bo.c
index 6353afa8d846..aafe69ed4320 100644
--- a/drivers/gpu/drm/xe/xe_bo.c
+++ b/drivers/gpu/drm/xe/xe_bo.c
@@ -1806,17 +1806,32 @@ int xe_gem_mmap_offset_ioctl(struct drm_device *dev, void *data,
int xe_bo_lock(struct xe_bo *bo, struct ww_acquire_ctx *ww,
int num_resv, bool intr)
{
- struct ttm_validate_buffer tv_bo;
- LIST_HEAD(objs);
- LIST_HEAD(dups);
+ struct dma_resv *obj;
+ int err;
XE_BUG_ON(!ww);
- tv_bo.num_shared = num_resv;
- tv_bo.bo = &bo->ttm;;
- list_add_tail(&tv_bo.head, &objs);
+ obj = bo->ttm.base.resv;
+ ww_acquire_init(ww, &reservation_ww_class);
+
+ if (intr)
+ err = dma_resv_lock_interruptible(obj, ww);
+ else
+ err = dma_resv_lock(obj, ww);
+
+ if (unlikely(err))
+ return err;
+
+ num_resv = max(num_resv, 1);
+ err = dma_resv_reserve_fences(obj, num_resv);
+ if (err)
+ goto out_err;
- return ttm_eu_reserve_buffers(ww, &objs, intr, &dups);
+ return 0;
+
+out_err:
+ dma_resv_unlock(obj);
+ return err;
}
void xe_bo_unlock(struct xe_bo *bo, struct ww_acquire_ctx *ww)
diff --git a/drivers/gpu/drm/xe/xe_bo_types.h b/drivers/gpu/drm/xe/xe_bo_types.h
index f6ee920303af..bc67263c6713 100644
--- a/drivers/gpu/drm/xe/xe_bo_types.h
+++ b/drivers/gpu/drm/xe/xe_bo_types.h
@@ -11,7 +11,6 @@
#include <drm/drm_mm.h>
#include <drm/ttm/ttm_bo.h>
#include <drm/ttm/ttm_device.h>
-#include <drm/ttm/ttm_execbuf_util.h>
#include <drm/ttm/ttm_placement.h>
struct xe_device;
diff --git a/drivers/gpu/drm/xe/xe_exec.c b/drivers/gpu/drm/xe/xe_exec.c
index ba13d20ed348..32a6e16ec177 100644
--- a/drivers/gpu/drm/xe/xe_exec.c
+++ b/drivers/gpu/drm/xe/xe_exec.c
@@ -6,6 +6,7 @@
#include "xe_exec.h"
#include <drm/drm_device.h>
+#include <drm/drm_exec.h>
#include <drm/drm_file.h>
#include <drm/xe_drm.h>
#include <linux/delay.h>
@@ -95,23 +96,18 @@
#define XE_EXEC_BIND_RETRY_TIMEOUT_MS 1000
-static int xe_exec_begin(struct xe_engine *e, struct ww_acquire_ctx *ww,
- struct ttm_validate_buffer tv_onstack[],
- struct ttm_validate_buffer **tv,
- struct list_head *objs)
+static int xe_exec_begin(struct xe_engine *e, struct drm_exec *exec)
{
struct xe_vm *vm = e->vm;
struct xe_vma *vma;
- LIST_HEAD(dups);
ktime_t end = 0;
int err = 0;
- *tv = NULL;
if (xe_vm_no_dma_fences(e->vm))
return 0;
retry:
- err = xe_vm_lock_dma_resv(vm, ww, tv_onstack, tv, objs, true, 1);
+ err = xe_vm_lock_dma_resv(vm, exec, true, 1);
if (err)
return err;
@@ -128,8 +124,7 @@ static int xe_exec_begin(struct xe_engine *e, struct ww_acquire_ctx *ww,
err = xe_bo_validate(xe_vma_bo(vma), vm, false);
if (err) {
- xe_vm_unlock_dma_resv(vm, tv_onstack, *tv, ww, objs);
- *tv = NULL;
+ xe_vm_unlock_dma_resv(vm, exec);
break;
}
}
@@ -153,14 +148,10 @@ static int xe_exec_begin(struct xe_engine *e, struct ww_acquire_ctx *ww,
return err;
}
-static void xe_exec_end(struct xe_engine *e,
- struct ttm_validate_buffer *tv_onstack,
- struct ttm_validate_buffer *tv,
- struct ww_acquire_ctx *ww,
- struct list_head *objs)
+static void xe_exec_end(struct xe_engine *e, struct drm_exec *exec)
{
if (!xe_vm_no_dma_fences(e->vm))
- xe_vm_unlock_dma_resv(e->vm, tv_onstack, tv, ww, objs);
+ xe_vm_unlock_dma_resv(e->vm, exec);
}
int xe_exec_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
@@ -173,14 +164,11 @@ int xe_exec_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
struct xe_engine *engine;
struct xe_sync_entry *syncs = NULL;
u64 addresses[XE_HW_ENGINE_MAX_INSTANCE];
- struct ttm_validate_buffer tv_onstack[XE_ONSTACK_TV];
- struct ttm_validate_buffer *tv = NULL;
u32 i, num_syncs = 0;
struct xe_sched_job *job;
struct dma_fence *rebind_fence;
struct xe_vm *vm;
- struct ww_acquire_ctx ww;
- struct list_head objs;
+ struct drm_exec exec;
bool write_locked;
int err = 0;
@@ -293,7 +281,7 @@ int xe_exec_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
goto err_unlock_list;
}
- err = xe_exec_begin(engine, &ww, tv_onstack, &tv, &objs);
+ err = xe_exec_begin(engine, &exec);
if (err)
goto err_unlock_list;
@@ -412,7 +400,7 @@ int xe_exec_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
if (err)
xe_sched_job_put(job);
err_engine_end:
- xe_exec_end(engine, tv_onstack, tv, &ww, &objs);
+ xe_exec_end(engine, &exec);
err_unlock_list:
if (write_locked)
up_write(&vm->lock);
diff --git a/drivers/gpu/drm/xe/xe_gt_pagefault.c b/drivers/gpu/drm/xe/xe_gt_pagefault.c
index 125e4744fa38..94f59c29ba9b 100644
--- a/drivers/gpu/drm/xe/xe_gt_pagefault.c
+++ b/drivers/gpu/drm/xe/xe_gt_pagefault.c
@@ -8,8 +8,8 @@
#include <linux/bitfield.h>
#include <linux/circ_buf.h>
+#include <drm/drm_exec.h>
#include <drm/drm_managed.h>
-#include <drm/ttm/ttm_execbuf_util.h>
#include "xe_bo.h"
#include "xe_gt.h"
@@ -84,11 +84,6 @@ static bool vma_matches(struct xe_vma *vma, u64 page_addr)
return true;
}
-static bool only_needs_bo_lock(struct xe_bo *bo)
-{
- return bo && bo->vm;
-}
-
static struct xe_vma *lookup_vma(struct xe_vm *vm, u64 page_addr)
{
struct xe_vma *vma = NULL;
@@ -110,10 +105,7 @@ static int handle_pagefault(struct xe_gt *gt, struct pagefault *pf)
struct xe_vm *vm;
struct xe_vma *vma = NULL;
struct xe_bo *bo;
- LIST_HEAD(objs);
- LIST_HEAD(dups);
- struct ttm_validate_buffer tv_bo, tv_vm;
- struct ww_acquire_ctx ww;
+ struct drm_exec exec;
struct dma_fence *fence;
bool write_locked;
int ret = 0;
@@ -171,20 +163,7 @@ static int handle_pagefault(struct xe_gt *gt, struct pagefault *pf)
/* Lock VM and BOs dma-resv */
bo = xe_vma_bo(vma);
- if (only_needs_bo_lock(bo)) {
- /* This path ensures the BO's LRU is updated */
- ret = xe_bo_lock(bo, &ww, xe->info.tile_count, false);
- } else {
- tv_vm.num_shared = xe->info.tile_count;
- tv_vm.bo = xe_vm_ttm_bo(vm);
- list_add(&tv_vm.head, &objs);
- if (bo) {
- tv_bo.bo = &bo->ttm;
- tv_bo.num_shared = xe->info.tile_count;
- list_add(&tv_bo.head, &objs);
- }
- ret = ttm_eu_reserve_buffers(&ww, &objs, false, &dups);
- }
+ ret = xe_vm_bo_lock(vm, bo, &exec, xe->info.tile_count, false);
if (ret)
goto unlock_vm;
@@ -227,10 +206,7 @@ static int handle_pagefault(struct xe_gt *gt, struct pagefault *pf)
vma->usm.tile_invalidated &= ~BIT(gt_to_tile(gt)->id);
unlock_dma_resv:
- if (only_needs_bo_lock(bo))
- xe_bo_unlock(bo, &ww);
- else
- ttm_eu_backoff_reservation(&ww, &objs);
+ xe_vm_bo_unlock(vm, bo, &exec, true);
unlock_vm:
if (!ret)
vm->usm.last_fault_vma = vma;
@@ -498,10 +474,7 @@ static int handle_acc(struct xe_gt *gt, struct acc *acc)
struct xe_vm *vm;
struct xe_vma *vma;
struct xe_bo *bo;
- LIST_HEAD(objs);
- LIST_HEAD(dups);
- struct ttm_validate_buffer tv_bo, tv_vm;
- struct ww_acquire_ctx ww;
+ struct drm_exec exec;
int ret = 0;
/* We only support ACC_TRIGGER at the moment */
@@ -534,28 +507,14 @@ static int handle_acc(struct xe_gt *gt, struct acc *acc)
/* Lock VM and BOs dma-resv */
bo = xe_vma_bo(vma);
- if (only_needs_bo_lock(bo)) {
- /* This path ensures the BO's LRU is updated */
- ret = xe_bo_lock(bo, &ww, xe->info.tile_count, false);
- } else {
- tv_vm.num_shared = xe->info.tile_count;
- tv_vm.bo = xe_vm_ttm_bo(vm);
- list_add(&tv_vm.head, &objs);
- tv_bo.bo = &bo->ttm;
- tv_bo.num_shared = xe->info.tile_count;
- list_add(&tv_bo.head, &objs);
- ret = ttm_eu_reserve_buffers(&ww, &objs, false, &dups);
- }
+ ret = xe_vm_bo_lock(vm, bo, &exec, xe->info.tile_count, false);
if (ret)
goto unlock_vm;
/* Migrate to VRAM, move should invalidate the VMA first */
ret = xe_bo_migrate(bo, XE_PL_VRAM0 + tile->id);
- if (only_needs_bo_lock(bo))
- xe_bo_unlock(bo, &ww);
- else
- ttm_eu_backoff_reservation(&ww, &objs);
+ xe_vm_bo_unlock(vm, bo, &exec, true);
unlock_vm:
up_read(&vm->lock);
xe_vm_put(vm);
diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c
index 6c216350084b..c89b10d5feb5 100644
--- a/drivers/gpu/drm/xe/xe_vm.c
+++ b/drivers/gpu/drm/xe/xe_vm.c
@@ -7,8 +7,8 @@
#include <linux/dma-fence-array.h>
+#include <drm/drm_exec.h>
#include <drm/drm_print.h>
-#include <drm/ttm/ttm_execbuf_util.h>
#include <drm/ttm/ttm_tt.h>
#include <drm/xe_drm.h>
#include <linux/delay.h>
@@ -321,11 +321,8 @@ static void resume_and_reinstall_preempt_fences(struct xe_vm *vm)
int xe_vm_add_compute_engine(struct xe_vm *vm, struct xe_engine *e)
{
- struct ttm_validate_buffer tv_onstack[XE_ONSTACK_TV];
- struct ttm_validate_buffer *tv;
- struct ww_acquire_ctx ww;
- struct list_head objs;
struct dma_fence *pfence;
+ struct drm_exec exec;
int err;
bool wait;
@@ -333,7 +330,7 @@ int xe_vm_add_compute_engine(struct xe_vm *vm, struct xe_engine *e)
down_write(&vm->lock);
- err = xe_vm_lock_dma_resv(vm, &ww, tv_onstack, &tv, &objs, true, 1);
+ err = xe_vm_lock_dma_resv(vm, &exec, true, 1);
if (err)
goto out_unlock_outer;
@@ -367,7 +364,7 @@ int xe_vm_add_compute_engine(struct xe_vm *vm, struct xe_engine *e)
up_read(&vm->userptr.notifier_lock);
out_unlock:
- xe_vm_unlock_dma_resv(vm, tv_onstack, tv, &ww, &objs);
+ xe_vm_unlock_dma_resv(vm, &exec);
out_unlock_outer:
up_write(&vm->lock);
@@ -397,68 +394,43 @@ int __xe_vm_userptr_needs_repin(struct xe_vm *vm)
* xe_vm_lock_dma_resv() - Lock the vm dma_resv object and the dma_resv
* objects of the vm's external buffer objects.
* @vm: The vm.
- * @ww: Pointer to a struct ww_acquire_ctx locking context.
- * @tv_onstack: Array size XE_ONSTACK_TV of storage for the struct
- * ttm_validate_buffers used for locking.
- * @tv: Pointer to a pointer that on output contains the actual storage used.
- * @objs: List head for the buffer objects locked.
+ * @exec: Pointer to a struct drm_exec execution context.
* @intr: Whether to lock interruptible.
* @num_shared: Number of dma-fence slots to reserve in the locked objects.
*
* Locks the vm dma-resv objects and all the dma-resv objects of the
- * buffer objects on the vm external object list. The TTM utilities require
- * a list of struct ttm_validate_buffers pointing to the actual buffer
- * objects to lock. Storage for those struct ttm_validate_buffers should
- * be provided in @tv_onstack, and is typically reserved on the stack
- * of the caller. If the size of @tv_onstack isn't sufficient, then
- * storage will be allocated internally using kvmalloc().
+ * buffer objects on the vm external object list using helpers provided
+ * by drm_exec.
*
* The function performs deadlock handling internally, and after a
* successful return the ww locking transaction should be considered
* sealed.
*
- * Return: 0 on success, Negative error code on error. In particular if
- * @intr is set to true, -EINTR or -ERESTARTSYS may be returned. In case
- * of error, any locking performed has been reverted.
+ * Return: 0 on success, Negative error code on error.
*/
-int xe_vm_lock_dma_resv(struct xe_vm *vm, struct ww_acquire_ctx *ww,
- struct ttm_validate_buffer *tv_onstack,
- struct ttm_validate_buffer **tv,
- struct list_head *objs,
- bool intr,
- unsigned int num_shared)
-{
- struct ttm_validate_buffer *tv_vm, *tv_bo;
+int xe_vm_lock_dma_resv(struct xe_vm *vm, struct drm_exec *exec,
+ bool intr, unsigned int num_shared)
+{
struct xe_vma *vma, *next;
- LIST_HEAD(dups);
+ struct drm_gem_object *obj;
int err;
lockdep_assert_held(&vm->lock);
- if (vm->extobj.entries < XE_ONSTACK_TV) {
- tv_vm = tv_onstack;
- } else {
- tv_vm = kvmalloc_array(vm->extobj.entries + 1, sizeof(*tv_vm),
- GFP_KERNEL);
- if (!tv_vm)
- return -ENOMEM;
+ drm_exec_init(exec, intr ? DRM_EXEC_INTERRUPTIBLE_WAIT : 0);
+ drm_exec_until_all_locked(exec) {
+ err = drm_exec_prepare_obj(exec, xe_vm_gem(vm), num_shared);
+ drm_exec_retry_on_contention(exec);
+ if (unlikely(err) && err != -EALREADY)
+ goto out_err;
+ list_for_each_entry(vma, &vm->extobj.list, extobj.link) {
+ obj = &xe_vma_bo(vma)->ttm.base;
+ err = drm_exec_prepare_obj(exec, obj, num_shared);
+ drm_exec_retry_on_contention(exec);
+ if (unlikely(err) && err != -EALREADY)
+ goto out_err;
+ }
}
- tv_bo = tv_vm + 1;
-
- INIT_LIST_HEAD(objs);
- list_for_each_entry(vma, &vm->extobj.list, extobj.link) {
- tv_bo->num_shared = num_shared;
- tv_bo->bo = &xe_vma_bo(vma)->ttm;
-
- list_add_tail(&tv_bo->head, objs);
- tv_bo++;
- }
- tv_vm->num_shared = num_shared;
- tv_vm->bo = xe_vm_ttm_bo(vm);
- list_add_tail(&tv_vm->head, objs);
- err = ttm_eu_reserve_buffers(ww, objs, intr, &dups);
- if (err)
- goto out_err;
spin_lock(&vm->notifier.list_lock);
list_for_each_entry_safe(vma, next, &vm->notifier.rebind_list,
@@ -470,14 +442,10 @@ int xe_vm_lock_dma_resv(struct xe_vm *vm, struct ww_acquire_ctx *ww,
list_move_tail(&vma->rebind_link, &vm->rebind_list);
}
spin_unlock(&vm->notifier.list_lock);
-
- *tv = tv_vm;
return 0;
out_err:
- if (tv_vm != tv_onstack)
- kvfree(tv_vm);
-
+ drm_exec_fini(exec);
return err;
}
@@ -485,20 +453,16 @@ int xe_vm_lock_dma_resv(struct xe_vm *vm, struct ww_acquire_ctx *ww,
* xe_vm_unlock_dma_resv() - Unlock reservation objects locked by
* xe_vm_lock_dma_resv()
* @vm: The vm.
- * @tv_onstack: The @tv_onstack array given to xe_vm_lock_dma_resv().
- * @tv: The value of *@tv given by xe_vm_lock_dma_resv().
- * @ww: The ww_acquire_context used for locking.
- * @objs: The list returned from xe_vm_lock_dma_resv().
+ * @exec: The @drm_exec given to xe_vm_lock_dma_resv().
*
* Unlocks the reservation objects and frees any memory allocated by
* xe_vm_lock_dma_resv().
*/
-void xe_vm_unlock_dma_resv(struct xe_vm *vm,
- struct ttm_validate_buffer *tv_onstack,
- struct ttm_validate_buffer *tv,
- struct ww_acquire_ctx *ww,
- struct list_head *objs)
+void xe_vm_unlock_dma_resv(struct xe_vm *vm, struct drm_exec *exec)
{
+ struct drm_gem_object *obj, *skip = xe_vm_gem(vm);
+ unsigned long index;
+
/*
* Nothing should've been able to enter the list while we were locked,
* since we've held the dma-resvs of all the vm's external objects,
@@ -507,9 +471,13 @@ void xe_vm_unlock_dma_resv(struct xe_vm *vm,
*/
XE_WARN_ON(!list_empty(&vm->notifier.rebind_list));
- ttm_eu_backoff_reservation(ww, objs);
- if (tv && tv != tv_onstack)
- kvfree(tv);
+ drm_exec_for_each_locked_object(exec, index, obj) {
+ struct xe_bo *bo = gem_to_xe_bo(obj);
+
+ if (obj != skip)
+ ttm_bo_move_to_lru_tail_unlocked(&bo->ttm);
+ }
+ drm_exec_fini(exec);
}
#define XE_VM_REBIND_RETRY_TIMEOUT_MS 1000
@@ -536,10 +504,7 @@ static void preempt_rebind_work_func(struct work_struct *w)
{
struct xe_vm *vm = container_of(w, struct xe_vm, preempt.rebind_work);
struct xe_vma *vma;
- struct ttm_validate_buffer tv_onstack[XE_ONSTACK_TV];
- struct ttm_validate_buffer *tv;
- struct ww_acquire_ctx ww;
- struct list_head objs;
+ struct drm_exec exec;
struct dma_fence *rebind_fence;
unsigned int fence_count = 0;
LIST_HEAD(preempt_fences);
@@ -582,8 +547,7 @@ static void preempt_rebind_work_func(struct work_struct *w)
goto out_unlock_outer;
}
- err = xe_vm_lock_dma_resv(vm, &ww, tv_onstack, &tv, &objs,
- false, vm->preempt.num_engines);
+ err = xe_vm_lock_dma_resv(vm, &exec, false, vm->preempt.num_engines);
if (err)
goto out_unlock_outer;
@@ -662,7 +626,7 @@ static void preempt_rebind_work_func(struct work_struct *w)
up_read(&vm->userptr.notifier_lock);
out_unlock:
- xe_vm_unlock_dma_resv(vm, tv_onstack, tv, &ww, &objs);
+ xe_vm_unlock_dma_resv(vm, &exec);
out_unlock_outer:
if (err == -EAGAIN) {
trace_xe_vm_rebind_worker_retry(vm);
@@ -1105,27 +1069,17 @@ static void xe_vma_destroy(struct xe_vma *vma, struct dma_fence *fence)
static void xe_vma_destroy_unlocked(struct xe_vma *vma)
{
- struct ttm_validate_buffer tv[2];
- struct ww_acquire_ctx ww;
+ struct xe_vm *vm = xe_vma_vm(vma);
struct xe_bo *bo = xe_vma_bo(vma);
- LIST_HEAD(objs);
- LIST_HEAD(dups);
+ struct drm_exec exec;
int err;
- memset(tv, 0, sizeof(tv));
- tv[0].bo = xe_vm_ttm_bo(xe_vma_vm(vma));
- list_add(&tv[0].head, &objs);
-
- if (bo) {
- tv[1].bo = &xe_bo_get(bo)->ttm;
- list_add(&tv[1].head, &objs);
- }
- err = ttm_eu_reserve_buffers(&ww, &objs, false, &dups);
+ err = xe_vm_bo_lock(vm, xe_bo_get(bo), &exec, 0, false);
XE_WARN_ON(err);
xe_vma_destroy(vma, NULL);
- ttm_eu_backoff_reservation(&ww, &objs);
+ xe_vm_bo_unlock(vm, bo, &exec, false);
if (bo)
xe_bo_put(bo);
}
@@ -2125,21 +2079,6 @@ static int xe_vm_prefetch(struct xe_vm *vm, struct xe_vma *vma,
#define VM_BIND_OP(op) (op & 0xffff)
-struct ttm_buffer_object *xe_vm_ttm_bo(struct xe_vm *vm)
-{
- int idx = vm->flags & XE_VM_FLAG_MIGRATION ?
- XE_VM_FLAG_GT_ID(vm->flags) : 0;
-
- /* Safe to use index 0 as all BO in the VM share a single dma-resv lock */
- return &vm->pt_root[idx]->bo->ttm;
-}
-
-static void xe_vm_tv_populate(struct xe_vm *vm, struct ttm_validate_buffer *tv)
-{
- tv->num_shared = 1;
- tv->bo = xe_vm_ttm_bo(vm);
-}
-
static void vm_set_async_error(struct xe_vm *vm, int err)
{
lockdep_assert_held(&vm->lock);
@@ -2577,17 +2516,12 @@ static int xe_vma_op_commit(struct xe_vm *vm, struct xe_vma_op *op)
static int __xe_vma_op_execute(struct xe_vm *vm, struct xe_vma *vma,
struct xe_vma_op *op)
{
- LIST_HEAD(objs);
- LIST_HEAD(dups);
- struct ttm_validate_buffer tv_bo, tv_vm;
- struct ww_acquire_ctx ww;
struct xe_bo *vbo;
+ struct drm_exec exec;
int err;
lockdep_assert_held_write(&vm->lock);
- xe_vm_tv_populate(vm, &tv_vm);
- list_add_tail(&tv_vm.head, &objs);
vbo = xe_vma_bo(vma);
if (vbo) {
/*
@@ -2596,16 +2530,10 @@ static int __xe_vma_op_execute(struct xe_vm *vm, struct xe_vma *vma,
* take a reference here.
*/
xe_bo_get(vbo);
-
- if (!vbo->vm) {
- tv_bo.bo = &vbo->ttm;
- tv_bo.num_shared = 1;
- list_add(&tv_bo.head, &objs);
- }
}
again:
- err = ttm_eu_reserve_buffers(&ww, &objs, true, &dups);
+ err = xe_vm_bo_lock(vm, vbo, &exec, 1, true);
if (err) {
xe_bo_put(vbo);
return err;
@@ -2687,7 +2615,7 @@ static int __xe_vma_op_execute(struct xe_vm *vm, struct xe_vma *vma,
XE_BUG_ON("NOT POSSIBLE");
}
- ttm_eu_backoff_reservation(&ww, &objs);
+ xe_vm_bo_unlock(vm, vbo, &exec, false);
if (err == -EAGAIN && xe_vma_is_userptr(vma)) {
lockdep_assert_held_write(&vm->lock);
err = xe_vma_userptr_pin_pages(vma);
@@ -3338,24 +3266,47 @@ int xe_vm_bind_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
return err == -ENODATA ? 0 : err;
}
+struct drm_gem_object *xe_vm_gem(struct xe_vm *vm)
+{
+ int idx = vm->flags & XE_VM_FLAG_MIGRATION ?
+ XE_VM_FLAG_GT_ID(vm->flags) : 0;
+
+ /* Safe to use index 0 as all BO in the VM share a single dma-resv lock */
+ return &vm->pt_root[idx]->bo->ttm.base;
+}
+
/*
- * XXX: Using the TTM wrappers for now, likely can call into dma-resv code
- * directly to optimize. Also this likely should be an inline function.
+ * XXX: This likely should be an inline function.
*/
int xe_vm_lock(struct xe_vm *vm, struct ww_acquire_ctx *ww,
int num_resv, bool intr)
{
- struct ttm_validate_buffer tv_vm;
- LIST_HEAD(objs);
- LIST_HEAD(dups);
+ struct dma_resv *obj;
+ int err;
XE_BUG_ON(!ww);
- tv_vm.num_shared = num_resv;
- tv_vm.bo = xe_vm_ttm_bo(vm);;
- list_add_tail(&tv_vm.head, &objs);
+ obj = xe_vm_gem(vm)->resv;
+ ww_acquire_init(ww, &reservation_ww_class);
+
+ if (intr)
+ err = dma_resv_lock_interruptible(obj, ww);
+ else
+ err = dma_resv_lock(obj, ww);
+
+ if (unlikely(err))
+ return err;
+
+ num_resv = max(num_resv, 1);
+ err = dma_resv_reserve_fences(obj, num_resv);
+ if (err)
+ goto out_err;
- return ttm_eu_reserve_buffers(ww, &objs, intr, &dups);
+ return 0;
+
+out_err:
+ dma_resv_unlock(&vm->resv);
+ return err;
}
void xe_vm_unlock(struct xe_vm *vm, struct ww_acquire_ctx *ww)
@@ -3364,6 +3315,43 @@ void xe_vm_unlock(struct xe_vm *vm, struct ww_acquire_ctx *ww)
ww_acquire_fini(ww);
}
+int xe_vm_bo_lock(struct xe_vm *vm, struct xe_bo *bo, struct drm_exec *exec,
+ int num_resv, bool intr)
+{
+ int err;
+
+ drm_exec_init(exec, intr ? DRM_EXEC_INTERRUPTIBLE_WAIT : 0);
+ drm_exec_until_all_locked(exec) {
+ err = drm_exec_prepare_obj(exec, xe_vm_gem(vm),
+ num_resv);
+ drm_exec_retry_on_contention(exec);
+ if (err && err != -EALREADY)
+ goto out_err;
+
+ if (bo && !bo->vm) {
+ err = drm_exec_prepare_obj(exec, &bo->ttm.base,
+ num_resv);
+ drm_exec_retry_on_contention(exec);
+ if (err && err != -EALREADY)
+ goto out_err;
+ }
+ }
+
+ return 0;
+
+out_err:
+ drm_exec_fini(exec);
+ return err;
+}
+
+void xe_vm_bo_unlock(struct xe_vm *vm, struct xe_bo *bo, struct drm_exec *exec,
+ bool lru_update)
+{
+ if (lru_update && bo && (!bo->vm || xe_vm_no_dma_fences(vm)))
+ ttm_bo_move_to_lru_tail_unlocked(&bo->ttm);
+ drm_exec_fini(exec);
+}
+
/**
* xe_vm_invalidate_vma - invalidate GPU mappings for VMA without a lock
* @vma: VMA to invalidate
diff --git a/drivers/gpu/drm/xe/xe_vm.h b/drivers/gpu/drm/xe/xe_vm.h
index eaf11ac8ff51..62a062bd5078 100644
--- a/drivers/gpu/drm/xe/xe_vm.h
+++ b/drivers/gpu/drm/xe/xe_vm.h
@@ -12,6 +12,7 @@
#include "xe_vm_types.h"
struct drm_device;
+struct drm_exec;
struct drm_printer;
struct drm_file;
@@ -39,11 +40,17 @@ static inline void xe_vm_put(struct xe_vm *vm)
kref_put(&vm->refcount, xe_vm_free);
}
+struct drm_gem_object *xe_vm_gem(struct xe_vm *vm);
+
int xe_vm_lock(struct xe_vm *vm, struct ww_acquire_ctx *ww,
int num_resv, bool intr);
-
void xe_vm_unlock(struct xe_vm *vm, struct ww_acquire_ctx *ww);
+int xe_vm_bo_lock(struct xe_vm *vm, struct xe_bo *bo, struct drm_exec *exec,
+ int num_resv, bool intr);
+void xe_vm_bo_unlock(struct xe_vm *vm, struct xe_bo *bo, struct drm_exec *exec,
+ bool lru_update);
+
static inline bool xe_vm_is_closed(struct xe_vm *vm)
{
/* Only guaranteed not to change when vm->lock is held */
@@ -183,8 +190,6 @@ int xe_vm_async_fence_wait_start(struct dma_fence *fence);
extern struct ttm_device_funcs xe_ttm_funcs;
-struct ttm_buffer_object *xe_vm_ttm_bo(struct xe_vm *vm);
-
/**
* xe_vm_reactivate_rebind() - Reactivate the rebind functionality on compute
* vms.
@@ -212,23 +217,10 @@ static inline void xe_vm_queue_rebind_worker(struct xe_vm *vm)
queue_work(vm->xe->ordered_wq, &vm->preempt.rebind_work);
}
-/*
- * XE_ONSTACK_TV is used to size the tv_onstack array that is input
- * to xe_vm_lock_dma_resv() and xe_vm_unlock_dma_resv().
- */
-#define XE_ONSTACK_TV 20
-int xe_vm_lock_dma_resv(struct xe_vm *vm, struct ww_acquire_ctx *ww,
- struct ttm_validate_buffer *tv_onstack,
- struct ttm_validate_buffer **tv,
- struct list_head *objs,
- bool intr,
- unsigned int num_shared);
-
-void xe_vm_unlock_dma_resv(struct xe_vm *vm,
- struct ttm_validate_buffer *tv_onstack,
- struct ttm_validate_buffer *tv,
- struct ww_acquire_ctx *ww,
- struct list_head *objs);
+int xe_vm_lock_dma_resv(struct xe_vm *vm, struct drm_exec *exec,
+ bool intr, unsigned int num_shared);
+
+void xe_vm_unlock_dma_resv(struct xe_vm *vm, struct drm_exec *exec);
void xe_vm_fence_all_extobjs(struct xe_vm *vm, struct dma_fence *fence,
enum dma_resv_usage usage);
--
2.34.1
More information about the Intel-xe
mailing list