[PATCH v4 2/3] drm/amdkfd: Enable GFX11 usermode queue oversubscription
Graham Sider
Graham.Sider at amd.com
Wed Jun 22 15:36:55 UTC 2022
Starting with GFX11, MES requires wptr BOs to be GTT allocated/mapped to
GART for usermode queues in order to support oversubscription. In the
case that work is submitted to an unmapped queue, MES must have a GART
wptr address to determine whether the queue should be mapped.
This change is accompanied with changes in MES and is applicable for
MES_API_VERSION >= 2.
v3:
- Use amdgpu_vm_bo_lookup_mapping for wptr_bo mapping lookup
- Move wptr_bo refcount increment to amdgpu_amdkfd_map_gtt_bo_to_gart
- Remove list_del_init from amdgpu_amdkfd_map_gtt_bo_to_gart
- Cleanup/fix create_queue wptr_bo error handling
v4:
- Add MES version shift/mask defines to amdgpu_mes.h
- Change version check from MES_VERSION to MES_API_VERSION
- Add check in kfd_ioctl_create_queue before wptr bo pin/GART map to
ensure bo is a single page.
Signed-off-by: Graham Sider <Graham.Sider at amd.com>
Acked-by: Alex Deucher <alexander.deucher at amd.com>
Reviewed-by: Philip Yang <Philip.Yang at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h | 2 +
.../gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 48 +++++++++++++++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h | 7 +++
drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 45 ++++++++++++++++-
.../drm/amd/amdkfd/kfd_device_queue_manager.c | 9 +++-
.../gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c | 2 +
drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 3 ++
.../amd/amdkfd/kfd_process_queue_manager.c | 20 +++++---
8 files changed, 127 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
index 648c031942e9..b25b41f50213 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
@@ -286,6 +286,8 @@ int amdgpu_amdkfd_gpuvm_map_gtt_bo_to_kernel(struct kgd_mem *mem,
void **kptr, uint64_t *size);
void amdgpu_amdkfd_gpuvm_unmap_gtt_bo_from_kernel(struct kgd_mem *mem);
+int amdgpu_amdkfd_map_gtt_bo_to_gart(struct amdgpu_device *adev, struct amdgpu_bo *bo);
+
int amdgpu_amdkfd_gpuvm_restore_process_bos(void *process_info,
struct dma_fence **ef);
int amdgpu_amdkfd_gpuvm_get_vm_fault_info(struct amdgpu_device *adev,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
index afd6e6923189..615ac2895d62 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
@@ -2148,6 +2148,54 @@ int amdgpu_amdkfd_gpuvm_sync_memory(
return ret;
}
+/**
+ * amdgpu_amdkfd_map_gtt_bo_to_gart - Map BO to GART and increment reference count
+ * @adev: Device to which allocated BO belongs
+ * @bo: Buffer object to be mapped
+ *
+ * Before return, bo reference count is incremented. To release the reference and unpin/
+ * unmap the BO, call amdgpu_amdkfd_free_gtt_mem.
+ */
+int amdgpu_amdkfd_map_gtt_bo_to_gart(struct amdgpu_device *adev, struct amdgpu_bo *bo)
+{
+ int ret;
+
+ ret = amdgpu_bo_reserve(bo, true);
+ if (ret) {
+ pr_err("Failed to reserve bo. ret %d\n", ret);
+ goto err_reserve_bo_failed;
+ }
+
+ ret = amdgpu_bo_pin(bo, AMDGPU_GEM_DOMAIN_GTT);
+ if (ret) {
+ pr_err("Failed to pin bo. ret %d\n", ret);
+ goto err_pin_bo_failed;
+ }
+
+ ret = amdgpu_ttm_alloc_gart(&bo->tbo);
+ if (ret) {
+ pr_err("Failed to bind bo to GART. ret %d\n", ret);
+ goto err_map_bo_gart_failed;
+ }
+
+ amdgpu_amdkfd_remove_eviction_fence(
+ bo, bo->kfd_bo->process_info->eviction_fence);
+
+ amdgpu_bo_unreserve(bo);
+
+ bo = amdgpu_bo_ref(bo);
+
+ return 0;
+
+err_map_bo_gart_failed:
+ amdgpu_bo_unpin(bo);
+err_pin_bo_failed:
+ amdgpu_bo_unreserve(bo);
+err_reserve_bo_failed:
+
+ return ret;
+}
+
/** amdgpu_amdkfd_gpuvm_map_gtt_bo_to_kernel() - Map a GTT BO for kernel CPU access
*
* @mem: Buffer object to be mapped for CPU access
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h
index be4b51a5b5c7..137a2cc2e807 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h
@@ -32,6 +32,13 @@
#define AMDGPU_MES_MAX_GFX_PIPES 2
#define AMDGPU_MES_MAX_SDMA_PIPES 2
+#define AMDGPU_MES_API_VERSION_SHIFT 12
+#define AMDGPU_MES_FEAT_VERSION_SHIFT 24
+
+#define AMDGPU_MES_VERSION_MASK 0x00000fff
+#define AMDGPU_MES_API_VERSION_MASK 0x00fff000
+#define AMDGPU_MES_FEAT_VERSION_MASK 0xff000000
+
enum amdgpu_mes_priority_level {
AMDGPU_MES_PRIORITY_LEVEL_LOW = 0,
AMDGPU_MES_PRIORITY_LEVEL_NORMAL = 1,
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
index 625e837f0119..a0246b4bae6b 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
@@ -299,6 +299,7 @@ static int kfd_ioctl_create_queue(struct file *filep, struct kfd_process *p,
struct kfd_process_device *pdd;
struct queue_properties q_properties;
uint32_t doorbell_offset_in_process = 0;
+ struct amdgpu_bo *wptr_bo = NULL;
memset(&q_properties, 0, sizeof(struct queue_properties));
@@ -326,12 +327,49 @@ static int kfd_ioctl_create_queue(struct file *filep, struct kfd_process *p,
goto err_bind_process;
}
+ /* Starting with GFX11, wptr BOs must be mapped to GART for MES to determine work
+ * on unmapped queues for usermode queue oversubscription (no aggregated doorbell)
+ */
+ if (dev->shared_resources.enable_mes &&
+ ((dev->adev->mes.sched_version & AMDGPU_MES_API_VERSION_MASK)
+ >> AMDGPU_MES_API_VERSION_SHIFT) >= 2) {
+ struct amdgpu_bo_va_mapping *wptr_mapping;
+ struct amdgpu_vm *wptr_vm;
+
+ wptr_vm = drm_priv_to_vm(pdd->drm_priv);
+ err = amdgpu_bo_reserve(wptr_vm->root.bo, false);
+ if (err)
+ goto err_wptr_map_gart;
+
+ wptr_mapping = amdgpu_vm_bo_lookup_mapping(
+ wptr_vm, args->write_pointer_address >> PAGE_SHIFT);
+ amdgpu_bo_unreserve(wptr_vm->root.bo);
+ if (!wptr_mapping) {
+ pr_err("Failed to lookup wptr bo\n");
+ err = -EINVAL;
+ goto err_wptr_map_gart;
+ }
+
+ wptr_bo = wptr_mapping->bo_va->base.bo;
+ if (wptr_bo->tbo.base.size > PAGE_SIZE) {
+ pr_err("Requested GART mapping for wptr bo larger than one page\n");
+ err = -EINVAL;
+ goto err_wptr_map_gart;
+ }
+
+ err = amdgpu_amdkfd_map_gtt_bo_to_gart(dev->adev, wptr_bo);
+ if (err) {
+ pr_err("Failed to map wptr bo to GART\n");
+ goto err_wptr_map_gart;
+ }
+ }
+
pr_debug("Creating queue for PASID 0x%x on gpu 0x%x\n",
p->pasid,
dev->id);
- err = pqm_create_queue(&p->pqm, dev, filep, &q_properties, &queue_id, NULL, NULL, NULL,
- &doorbell_offset_in_process);
+ err = pqm_create_queue(&p->pqm, dev, filep, &q_properties, &queue_id, wptr_bo,
+ NULL, NULL, NULL, &doorbell_offset_in_process);
if (err != 0)
goto err_create_queue;
@@ -363,6 +401,9 @@ static int kfd_ioctl_create_queue(struct file *filep, struct kfd_process *p,
return 0;
err_create_queue:
+ if (wptr_bo)
+ amdgpu_amdkfd_free_gtt_mem(dev->adev, wptr_bo);
+err_wptr_map_gart:
err_bind_process:
err_pdd:
mutex_unlock(&p->mutex);
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
index 213246a5b4e4..299927a4959b 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
@@ -177,6 +177,7 @@ static int add_queue_mes(struct device_queue_manager *dqm, struct queue *q,
struct kfd_process_device *pdd = qpd_to_pdd(qpd);
struct mes_add_queue_input queue_input;
int r, queue_type;
+ uint64_t wptr_addr_off;
if (dqm->is_hws_hang)
return -EIO;
@@ -196,7 +197,13 @@ static int add_queue_mes(struct device_queue_manager *dqm, struct queue *q,
AMDGPU_MES_PRIORITY_LEVEL_NORMAL;
queue_input.doorbell_offset = q->properties.doorbell_off;
queue_input.mqd_addr = q->gart_mqd_addr;
- queue_input.wptr_addr = (uint64_t)q->properties.write_ptr;
+
+ if (q->wptr_bo) {
+ wptr_addr_off = (uint64_t)q->properties.write_ptr - (uint64_t)q->wptr_bo->kfd_bo->va;
+ queue_input.wptr_addr = ((uint64_t)q->wptr_bo->tbo.resource->start << PAGE_SHIFT) + wptr_addr_off;
+ } else
+ queue_input.wptr_addr = (uint64_t)q->properties.write_ptr;
+
queue_input.paging = false;
queue_input.tba_addr = qpd->tba_addr;
queue_input.tma_addr = qpd->tma_addr;
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c
index 4e0387f591be..b8e14c2cc295 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v11.c
@@ -377,6 +377,8 @@ static void update_mqd_sdma(struct mqd_manager *mm, void *mqd,
m->sdmax_rlcx_rb_base_hi = upper_32_bits(q->queue_address >> 8);
m->sdmax_rlcx_rb_rptr_addr_lo = lower_32_bits((uint64_t)q->read_ptr);
m->sdmax_rlcx_rb_rptr_addr_hi = upper_32_bits((uint64_t)q->read_ptr);
+ m->sdmax_rlcx_rb_wptr_poll_addr_lo = lower_32_bits((uint64_t)q->write_ptr);
+ m->sdmax_rlcx_rb_wptr_poll_addr_hi = upper_32_bits((uint64_t)q->write_ptr);
m->sdmax_rlcx_doorbell_offset =
q->doorbell_off << SDMA0_QUEUE0_DOORBELL_OFFSET__OFFSET__SHIFT;
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
index 91e5fa56f0a2..59ba50ce54d3 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
@@ -570,6 +570,8 @@ struct queue {
void *gang_ctx_bo;
uint64_t gang_ctx_gpu_addr;
void *gang_ctx_cpu_ptr;
+
+ struct amdgpu_bo *wptr_bo;
};
enum KFD_MQD_TYPE {
@@ -1205,6 +1207,7 @@ int pqm_create_queue(struct process_queue_manager *pqm,
struct file *f,
struct queue_properties *properties,
unsigned int *qid,
+ struct amdgpu_bo *wptr_bo,
const struct kfd_criu_queue_priv_data *q_data,
const void *restore_mqd,
const void *restore_ctl_stack,
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c b/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c
index 99f2a6412201..8db58348de98 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c
@@ -180,7 +180,8 @@ void pqm_uninit(struct process_queue_manager *pqm)
static int init_user_queue(struct process_queue_manager *pqm,
struct kfd_dev *dev, struct queue **q,
struct queue_properties *q_properties,
- struct file *f, unsigned int qid)
+ struct file *f, struct amdgpu_bo *wptr_bo,
+ unsigned int qid)
{
int retval;
@@ -210,6 +211,7 @@ static int init_user_queue(struct process_queue_manager *pqm,
goto cleanup;
}
memset((*q)->gang_ctx_cpu_ptr, 0, AMDGPU_MES_GANG_CTX_SIZE);
+ (*q)->wptr_bo = wptr_bo;
}
pr_debug("PQM After init queue");
@@ -226,6 +228,7 @@ int pqm_create_queue(struct process_queue_manager *pqm,
struct file *f,
struct queue_properties *properties,
unsigned int *qid,
+ struct amdgpu_bo *wptr_bo,
const struct kfd_criu_queue_priv_data *q_data,
const void *restore_mqd,
const void *restore_ctl_stack,
@@ -288,7 +291,7 @@ int pqm_create_queue(struct process_queue_manager *pqm,
* allocate_sdma_queue() in create_queue() has the
* corresponding check logic.
*/
- retval = init_user_queue(pqm, dev, &q, properties, f, *qid);
+ retval = init_user_queue(pqm, dev, &q, properties, f, wptr_bo, *qid);
if (retval != 0)
goto err_create_queue;
pqn->q = q;
@@ -309,7 +312,7 @@ int pqm_create_queue(struct process_queue_manager *pqm,
goto err_create_queue;
}
- retval = init_user_queue(pqm, dev, &q, properties, f, *qid);
+ retval = init_user_queue(pqm, dev, &q, properties, f, wptr_bo, *qid);
if (retval != 0)
goto err_create_queue;
pqn->q = q;
@@ -435,10 +438,15 @@ int pqm_destroy_queue(struct process_queue_manager *pqm, unsigned int qid)
pdd->qpd.num_gws = 0;
}
- if (dev->shared_resources.enable_mes)
+ if (dev->shared_resources.enable_mes) {
amdgpu_amdkfd_free_gtt_mem(dev->adev,
pqn->q->gang_ctx_bo);
- kfd_procfs_del_queue(pqn->q);
+ if (pqn->q->wptr_bo)
+ amdgpu_amdkfd_free_gtt_mem(dev->adev, pqn->q->wptr_bo);
+
+ kfd_procfs_del_queue(pqn->q);
+
+ }
uninit_queue(pqn->q);
}
@@ -844,7 +852,7 @@ int kfd_criu_restore_queue(struct kfd_process *p,
print_queue_properties(&qp);
- ret = pqm_create_queue(&p->pqm, pdd->dev, NULL, &qp, &queue_id, q_data, mqd, ctl_stack,
+ ret = pqm_create_queue(&p->pqm, pdd->dev, NULL, &qp, &queue_id, NULL, q_data, mqd, ctl_stack,
NULL);
if (ret) {
pr_err("Failed to create new queue err:%d\n", ret);
--
2.25.1
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