From ef568db792e66216b48fd1567ff4a9d3bf9af866 Mon Sep 17 00:00:00 2001 From: Felix Kuehling Date: Tue, 10 Apr 2018 17:33:05 -0400 Subject: drm/amdkfd: Implement doorbell allocation for SOC15 Allocate doorbells according to the doorbell routing information on SOC15 ASICs (Vega10 and later). On older ASICs we continue to use the queue_id as the doorbell ID to maintain compatibility with the Thunk. Signed-off-by: Shaoyun Liu Signed-off-by: Felix Kuehling Reviewed-by: Oded Gabbay Signed-off-by: Oded Gabbay --- drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 7 ++ .../gpu/drm/amd/amdkfd/kfd_device_queue_manager.c | 82 ++++++++++++++++++++-- drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c | 12 ++-- drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 11 ++- drivers/gpu/drm/amd/amdkfd/kfd_process.c | 32 +++++++++ .../gpu/drm/amd/amdkfd/kfd_process_queue_manager.c | 12 +++- 6 files changed, 139 insertions(+), 17 deletions(-) (limited to 'drivers/gpu/drm/amd/amdkfd') diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c index 519c7b1854b2..5694fbead9a5 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c @@ -295,6 +295,13 @@ static int kfd_ioctl_create_queue(struct file *filep, struct kfd_process *p, args->doorbell_offset = KFD_MMAP_TYPE_DOORBELL; args->doorbell_offset |= KFD_MMAP_GPU_ID(args->gpu_id); args->doorbell_offset <<= PAGE_SHIFT; + if (KFD_IS_SOC15(dev->device_info->asic_family)) + /* On SOC15 ASICs, doorbell allocation must be + * per-device, and independent from the per-process + * queue_id. Return the doorbell offset within the + * doorbell aperture to user mode. + */ + args->doorbell_offset |= q_properties.doorbell_off; 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 d55d29d31da4..e9c72d8f0935 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c @@ -110,6 +110,57 @@ void program_sh_mem_settings(struct device_queue_manager *dqm, qpd->sh_mem_bases); } +static int allocate_doorbell(struct qcm_process_device *qpd, struct queue *q) +{ + struct kfd_dev *dev = qpd->dqm->dev; + + if (!KFD_IS_SOC15(dev->device_info->asic_family)) { + /* On pre-SOC15 chips we need to use the queue ID to + * preserve the user mode ABI. + */ + q->doorbell_id = q->properties.queue_id; + } else if (q->properties.type == KFD_QUEUE_TYPE_SDMA) { + /* For SDMA queues on SOC15, use static doorbell + * assignments based on the engine and queue. + */ + q->doorbell_id = dev->shared_resources.sdma_doorbell + [q->properties.sdma_engine_id] + [q->properties.sdma_queue_id]; + } else { + /* For CP queues on SOC15 reserve a free doorbell ID */ + unsigned int found; + + found = find_first_zero_bit(qpd->doorbell_bitmap, + KFD_MAX_NUM_OF_QUEUES_PER_PROCESS); + if (found >= KFD_MAX_NUM_OF_QUEUES_PER_PROCESS) { + pr_debug("No doorbells available"); + return -EBUSY; + } + set_bit(found, qpd->doorbell_bitmap); + q->doorbell_id = found; + } + + q->properties.doorbell_off = + kfd_doorbell_id_to_offset(dev, q->process, + q->doorbell_id); + + return 0; +} + +static void deallocate_doorbell(struct qcm_process_device *qpd, + struct queue *q) +{ + unsigned int old; + struct kfd_dev *dev = qpd->dqm->dev; + + if (!KFD_IS_SOC15(dev->device_info->asic_family) || + q->properties.type == KFD_QUEUE_TYPE_SDMA) + return; + + old = test_and_clear_bit(q->doorbell_id, qpd->doorbell_bitmap); + WARN_ON(!old); +} + static int allocate_vmid(struct device_queue_manager *dqm, struct qcm_process_device *qpd, struct queue *q) @@ -301,10 +352,14 @@ static int create_compute_queue_nocpsch(struct device_queue_manager *dqm, if (retval) return retval; + retval = allocate_doorbell(qpd, q); + if (retval) + goto out_deallocate_hqd; + retval = mqd->init_mqd(mqd, &q->mqd, &q->mqd_mem_obj, &q->gart_mqd_addr, &q->properties); if (retval) - goto out_deallocate_hqd; + goto out_deallocate_doorbell; pr_debug("Loading mqd to hqd on pipe %d, queue %d\n", q->pipe, q->queue); @@ -324,6 +379,8 @@ static int create_compute_queue_nocpsch(struct device_queue_manager *dqm, out_uninit_mqd: mqd->uninit_mqd(mqd, q->mqd, q->mqd_mem_obj); +out_deallocate_doorbell: + deallocate_doorbell(qpd, q); out_deallocate_hqd: deallocate_hqd(dqm, q); @@ -357,6 +414,8 @@ static int destroy_queue_nocpsch_locked(struct device_queue_manager *dqm, } dqm->total_queue_count--; + deallocate_doorbell(qpd, q); + retval = mqd->destroy_mqd(mqd, q->mqd, KFD_PREEMPT_TYPE_WAVEFRONT_RESET, KFD_UNMAP_LATENCY_MS, @@ -861,6 +920,10 @@ static int create_sdma_queue_nocpsch(struct device_queue_manager *dqm, q->properties.sdma_queue_id = q->sdma_id / CIK_SDMA_QUEUES_PER_ENGINE; q->properties.sdma_engine_id = q->sdma_id % CIK_SDMA_QUEUES_PER_ENGINE; + retval = allocate_doorbell(qpd, q); + if (retval) + goto out_deallocate_sdma_queue; + pr_debug("SDMA id is: %d\n", q->sdma_id); pr_debug("SDMA queue id: %d\n", q->properties.sdma_queue_id); pr_debug("SDMA engine id: %d\n", q->properties.sdma_engine_id); @@ -869,7 +932,7 @@ static int create_sdma_queue_nocpsch(struct device_queue_manager *dqm, retval = mqd->init_mqd(mqd, &q->mqd, &q->mqd_mem_obj, &q->gart_mqd_addr, &q->properties); if (retval) - goto out_deallocate_sdma_queue; + goto out_deallocate_doorbell; retval = mqd->load_mqd(mqd, q->mqd, 0, 0, &q->properties, NULL); if (retval) @@ -879,6 +942,8 @@ static int create_sdma_queue_nocpsch(struct device_queue_manager *dqm, out_uninit_mqd: mqd->uninit_mqd(mqd, q->mqd, q->mqd_mem_obj); +out_deallocate_doorbell: + deallocate_doorbell(qpd, q); out_deallocate_sdma_queue: deallocate_sdma_queue(dqm, q->sdma_id); @@ -1070,12 +1135,17 @@ static int create_queue_cpsch(struct device_queue_manager *dqm, struct queue *q, q->properties.sdma_engine_id = q->sdma_id % CIK_SDMA_QUEUES_PER_ENGINE; } + + retval = allocate_doorbell(qpd, q); + if (retval) + goto out_deallocate_sdma_queue; + mqd = dqm->ops.get_mqd_manager(dqm, get_mqd_type_from_queue_type(q->properties.type)); if (!mqd) { retval = -ENOMEM; - goto out_deallocate_sdma_queue; + goto out_deallocate_doorbell; } /* * Eviction state logic: we only mark active queues as evicted @@ -1093,7 +1163,7 @@ static int create_queue_cpsch(struct device_queue_manager *dqm, struct queue *q, retval = mqd->init_mqd(mqd, &q->mqd, &q->mqd_mem_obj, &q->gart_mqd_addr, &q->properties); if (retval) - goto out_deallocate_sdma_queue; + goto out_deallocate_doorbell; list_add(&q->list, &qpd->queues_list); qpd->queue_count++; @@ -1117,6 +1187,8 @@ static int create_queue_cpsch(struct device_queue_manager *dqm, struct queue *q, mutex_unlock(&dqm->lock); return retval; +out_deallocate_doorbell: + deallocate_doorbell(qpd, q); out_deallocate_sdma_queue: if (q->properties.type == KFD_QUEUE_TYPE_SDMA) deallocate_sdma_queue(dqm, q->sdma_id); @@ -1257,6 +1329,8 @@ static int destroy_queue_cpsch(struct device_queue_manager *dqm, goto failed; } + deallocate_doorbell(qpd, q); + if (q->properties.type == KFD_QUEUE_TYPE_SDMA) { dqm->sdma_queue_count--; deallocate_sdma_queue(dqm, q->sdma_id); diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c b/drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c index efc59dea563f..36c9269ea7c0 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c @@ -49,7 +49,7 @@ static unsigned int max_doorbell_slices; */ /* # of doorbell bytes allocated for each process. */ -static size_t kfd_doorbell_process_slice(struct kfd_dev *kfd) +size_t kfd_doorbell_process_slice(struct kfd_dev *kfd) { return roundup(kfd->device_info->doorbell_size * KFD_MAX_NUM_OF_QUEUES_PER_PROCESS, @@ -214,13 +214,9 @@ void write_kernel_doorbell(void __iomem *db, u32 value) } } -/* - * queue_ids are in the range [0,MAX_PROCESS_QUEUES) and are mapped 1:1 - * to doorbells with the process's doorbell page - */ -unsigned int kfd_queue_id_to_doorbell(struct kfd_dev *kfd, +unsigned int kfd_doorbell_id_to_offset(struct kfd_dev *kfd, struct kfd_process *process, - unsigned int queue_id) + unsigned int doorbell_id) { /* * doorbell_id_offset accounts for doorbells taken by KGD. @@ -231,7 +227,7 @@ unsigned int kfd_queue_id_to_doorbell(struct kfd_dev *kfd, return kfd->doorbell_id_offset + process->doorbell_index * kfd_doorbell_process_slice(kfd) / sizeof(u32) + - queue_id * kfd->device_info->doorbell_size / sizeof(u32); + doorbell_id * kfd->device_info->doorbell_size / sizeof(u32); } uint64_t kfd_get_number_elems(struct kfd_dev *kfd) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h index 2d575c014651..ddb3c8cdfb7b 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h +++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h @@ -169,6 +169,8 @@ enum cache_policy { cache_policy_noncoherent }; +#define KFD_IS_SOC15(chip) ((chip) >= CHIP_VEGA10) + struct kfd_event_interrupt_class { bool (*interrupt_isr)(struct kfd_dev *dev, const uint32_t *ih_ring_entry); @@ -449,6 +451,7 @@ struct queue { uint32_t queue; unsigned int sdma_id; + unsigned int doorbell_id; struct kfd_process *process; struct kfd_dev *device; @@ -523,6 +526,9 @@ struct qcm_process_device { /* IB memory */ uint64_t ib_base; void *ib_kaddr; + + /* doorbell resources per process per device */ + unsigned long *doorbell_bitmap; }; /* KFD Memory Eviction */ @@ -747,6 +753,7 @@ unsigned int kfd_pasid_alloc(void); void kfd_pasid_free(unsigned int pasid); /* Doorbells */ +size_t kfd_doorbell_process_slice(struct kfd_dev *kfd); int kfd_doorbell_init(struct kfd_dev *kfd); void kfd_doorbell_fini(struct kfd_dev *kfd); int kfd_doorbell_mmap(struct kfd_dev *dev, struct kfd_process *process, @@ -756,9 +763,9 @@ void __iomem *kfd_get_kernel_doorbell(struct kfd_dev *kfd, void kfd_release_kernel_doorbell(struct kfd_dev *kfd, u32 __iomem *db_addr); u32 read_kernel_doorbell(u32 __iomem *db); void write_kernel_doorbell(void __iomem *db, u32 value); -unsigned int kfd_queue_id_to_doorbell(struct kfd_dev *kfd, +unsigned int kfd_doorbell_id_to_offset(struct kfd_dev *kfd, struct kfd_process *process, - unsigned int queue_id); + unsigned int doorbell_id); phys_addr_t kfd_get_process_doorbells(struct kfd_dev *dev, struct kfd_process *process); int kfd_alloc_process_doorbells(struct kfd_process *process); diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c index 131fe2a1b589..1d80b4f7c681 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c @@ -332,6 +332,7 @@ static void kfd_process_destroy_pdds(struct kfd_process *p) free_pages((unsigned long)pdd->qpd.cwsr_kaddr, get_order(KFD_CWSR_TBA_TMA_SIZE)); + kfree(pdd->qpd.doorbell_bitmap); idr_destroy(&pdd->alloc_idr); kfree(pdd); @@ -586,6 +587,31 @@ err_alloc_process: return ERR_PTR(err); } +static int init_doorbell_bitmap(struct qcm_process_device *qpd, + struct kfd_dev *dev) +{ + unsigned int i; + + if (!KFD_IS_SOC15(dev->device_info->asic_family)) + return 0; + + qpd->doorbell_bitmap = + kzalloc(DIV_ROUND_UP(KFD_MAX_NUM_OF_QUEUES_PER_PROCESS, + BITS_PER_BYTE), GFP_KERNEL); + if (!qpd->doorbell_bitmap) + return -ENOMEM; + + /* Mask out any reserved doorbells */ + for (i = 0; i < KFD_MAX_NUM_OF_QUEUES_PER_PROCESS; i++) + if ((dev->shared_resources.reserved_doorbell_mask & i) == + dev->shared_resources.reserved_doorbell_val) { + set_bit(i, qpd->doorbell_bitmap); + pr_debug("reserved doorbell 0x%03x\n", i); + } + + return 0; +} + struct kfd_process_device *kfd_get_process_device_data(struct kfd_dev *dev, struct kfd_process *p) { @@ -607,6 +633,12 @@ struct kfd_process_device *kfd_create_process_device_data(struct kfd_dev *dev, if (!pdd) return NULL; + if (init_doorbell_bitmap(&pdd->qpd, dev)) { + pr_err("Failed to init doorbell for process\n"); + kfree(pdd); + return NULL; + } + pdd->dev = dev; INIT_LIST_HEAD(&pdd->qpd.queues_list); INIT_LIST_HEAD(&pdd->qpd.priv_queue_list); 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 7817e327ea6d..3045aebdc3f7 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c @@ -119,9 +119,6 @@ static int create_cp_queue(struct process_queue_manager *pqm, /* Doorbell initialized in user space*/ q_properties->doorbell_ptr = NULL; - q_properties->doorbell_off = - kfd_queue_id_to_doorbell(dev, pqm->process, qid); - /* let DQM handle it*/ q_properties->vmid = 0; q_properties->queue_id = qid; @@ -248,6 +245,15 @@ int pqm_create_queue(struct process_queue_manager *pqm, goto err_create_queue; } + if (q) + /* Return the doorbell offset within the doorbell page + * to the caller so it can be passed up to user mode + * (in bytes). + */ + properties->doorbell_off = + (q->properties.doorbell_off * sizeof(uint32_t)) & + (kfd_doorbell_process_slice(dev) - 1); + pr_debug("PQM After DQM create queue\n"); list_add(&pqn->process_queue_list, &pqm->queues); -- cgit v1.2.3