From e3cbb1f404b65211218002df00aead255dfb1c04 Mon Sep 17 00:00:00 2001 From: Shashank Sharma Date: Fri, 14 Jul 2023 16:22:38 +0200 Subject: [PATCH] drm/amdgpu: use doorbell mgr for MES kernel doorbells This patch: - Removes the existing doorbell management code, and its variables from the doorbell_init function, it will be done in doorbell manager now. - uses the doorbell page created for MES kernel level needs (doorbells for MES self tests) - current MES code was allocating MES doorbells in MES process context, but those were getting written using kernel doorbell calls. This patch instead allocates a MES kernel doorbell for this (in add_hw_queue). V2: Create an extra page of doorbells for MES during kernel doorbell creation (Alex) V4: Move MES doorbell size and page offset objects in this patch from patch 6. Cc: Alex Deucher Cc: Christian Koenig Reviewed-by: Christian Koenig Signed-off-by: Shashank Sharma Signed-off-by: Arvind Yadav Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell_mgr.c | 4 + drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c | 94 ++++++++++-------------- drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h | 6 ++ 3 files changed, 47 insertions(+), 57 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell_mgr.c index 423f2fd..da4be0b 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell_mgr.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell_mgr.c @@ -145,6 +145,10 @@ int amdgpu_doorbell_create_kernel_doorbells(struct amdgpu_device *adev) /* Reserve first num_kernel_doorbells (page-aligned) for kernel ops */ size = ALIGN(adev->doorbell.num_kernel_doorbells * sizeof(u32), PAGE_SIZE); + /* Allocate an extra page for MES kernel usages (ring test) */ + adev->mes.db_start_dw_offset = size / sizeof(u32); + size += PAGE_SIZE; + r = amdgpu_bo_create_kernel(adev, size, PAGE_SIZE, diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c index 37f15ab..dd9a1f3 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c @@ -68,91 +68,70 @@ unsigned int amdgpu_mes_get_doorbell_dw_offset_in_bar( doorbell_id * 2); } -static int amdgpu_mes_queue_doorbell_get(struct amdgpu_device *adev, +static int amdgpu_mes_kernel_doorbell_get(struct amdgpu_device *adev, struct amdgpu_mes_process *process, int ip_type, uint64_t *doorbell_index) { unsigned int offset, found; + struct amdgpu_mes *mes = &adev->mes; - if (ip_type == AMDGPU_RING_TYPE_SDMA) { + if (ip_type == AMDGPU_RING_TYPE_SDMA) offset = adev->doorbell_index.sdma_engine[0]; - found = find_next_zero_bit(process->doorbell_bitmap, - AMDGPU_MES_MAX_NUM_OF_QUEUES_PER_PROCESS, - offset); - } else { - found = find_first_zero_bit(process->doorbell_bitmap, - AMDGPU_MES_MAX_NUM_OF_QUEUES_PER_PROCESS); - } + else + offset = 0; - if (found >= AMDGPU_MES_MAX_NUM_OF_QUEUES_PER_PROCESS) { + found = find_next_zero_bit(mes->doorbell_bitmap, mes->num_mes_dbs, offset); + if (found >= mes->num_mes_dbs) { DRM_WARN("No doorbell available\n"); return -ENOSPC; } - set_bit(found, process->doorbell_bitmap); - - *doorbell_index = amdgpu_mes_get_doorbell_dw_offset_in_bar(adev, - process->doorbell_index, found); + set_bit(found, mes->doorbell_bitmap); + /* Get the absolute doorbell index on BAR */ + *doorbell_index = mes->db_start_dw_offset + found * 2; return 0; } -static void amdgpu_mes_queue_doorbell_free(struct amdgpu_device *adev, +static void amdgpu_mes_kernel_doorbell_free(struct amdgpu_device *adev, struct amdgpu_mes_process *process, uint32_t doorbell_index) { - unsigned int old, doorbell_id; - - doorbell_id = doorbell_index - - (process->doorbell_index * - amdgpu_mes_doorbell_process_slice(adev)) / sizeof(u32); - doorbell_id /= 2; + unsigned int old, rel_index; + struct amdgpu_mes *mes = &adev->mes; - old = test_and_clear_bit(doorbell_id, process->doorbell_bitmap); + /* Find the relative index of the doorbell in this object */ + rel_index = (doorbell_index - mes->db_start_dw_offset) / 2; + old = test_and_clear_bit(rel_index, mes->doorbell_bitmap); WARN_ON(!old); } static int amdgpu_mes_doorbell_init(struct amdgpu_device *adev) { - size_t doorbell_start_offset; - size_t doorbell_aperture_size; - size_t doorbell_process_limit; - size_t aggregated_doorbell_start; int i; + struct amdgpu_mes *mes = &adev->mes; - aggregated_doorbell_start = (adev->doorbell_index.max_assignment + 1) * sizeof(u32); - aggregated_doorbell_start = - roundup(aggregated_doorbell_start, PAGE_SIZE); - - doorbell_start_offset = aggregated_doorbell_start + PAGE_SIZE; - doorbell_start_offset = - roundup(doorbell_start_offset, - amdgpu_mes_doorbell_process_slice(adev)); - - doorbell_aperture_size = adev->doorbell.size; - doorbell_aperture_size = - rounddown(doorbell_aperture_size, - amdgpu_mes_doorbell_process_slice(adev)); - - if (doorbell_aperture_size > doorbell_start_offset) - doorbell_process_limit = - (doorbell_aperture_size - doorbell_start_offset) / - amdgpu_mes_doorbell_process_slice(adev); - else - return -ENOSPC; - - adev->mes.doorbell_id_offset = doorbell_start_offset / sizeof(u32); - adev->mes.max_doorbell_slices = doorbell_process_limit; + /* Bitmap for dynamic allocation of kernel doorbells */ + mes->doorbell_bitmap = bitmap_zalloc(PAGE_SIZE / sizeof(u32), GFP_KERNEL); + if (!mes->doorbell_bitmap) { + DRM_ERROR("Failed to allocate MES doorbell bitmap\n"); + return -ENOMEM; + } - /* allocate Qword range for aggregated doorbell */ - for (i = 0; i < AMDGPU_MES_PRIORITY_NUM_LEVELS; i++) - adev->mes.aggregated_doorbells[i] = - aggregated_doorbell_start / sizeof(u32) + i * 2; + mes->num_mes_dbs = PAGE_SIZE / AMDGPU_ONE_DOORBELL_SIZE; + for (i = 0; i < AMDGPU_MES_PRIORITY_NUM_LEVELS; i++) { + adev->mes.aggregated_doorbells[i] = mes->db_start_dw_offset + i * 2; + set_bit(i, mes->doorbell_bitmap); + } - DRM_INFO("max_doorbell_slices=%zu\n", doorbell_process_limit); return 0; } +static void amdgpu_mes_doorbell_free(struct amdgpu_device *adev) +{ + bitmap_free(adev->mes.doorbell_bitmap); +} + int amdgpu_mes_init(struct amdgpu_device *adev) { int i, r; @@ -251,6 +230,7 @@ void amdgpu_mes_fini(struct amdgpu_device *adev) amdgpu_device_wb_free(adev, adev->mes.sch_ctx_offs); amdgpu_device_wb_free(adev, adev->mes.query_status_fence_offs); amdgpu_device_wb_free(adev, adev->mes.read_val_offs); + amdgpu_mes_doorbell_free(adev); idr_destroy(&adev->mes.pasid_idr); idr_destroy(&adev->mes.gang_id_idr); @@ -682,7 +662,7 @@ int amdgpu_mes_add_hw_queue(struct amdgpu_device *adev, int gang_id, *queue_id = queue->queue_id = r; /* allocate a doorbell index for the queue */ - r = amdgpu_mes_queue_doorbell_get(adev, gang->process, + r = amdgpu_mes_kernel_doorbell_get(adev, gang->process, qprops->queue_type, &qprops->doorbell_off); if (r) @@ -740,7 +720,7 @@ int amdgpu_mes_add_hw_queue(struct amdgpu_device *adev, int gang_id, return 0; clean_up_doorbell: - amdgpu_mes_queue_doorbell_free(adev, gang->process, + amdgpu_mes_kernel_doorbell_free(adev, gang->process, qprops->doorbell_off); clean_up_queue_id: spin_lock_irqsave(&adev->mes.queue_id_lock, flags); @@ -795,7 +775,7 @@ int amdgpu_mes_remove_hw_queue(struct amdgpu_device *adev, int queue_id) queue_id); list_del(&queue->list); - amdgpu_mes_queue_doorbell_free(adev, gang->process, + amdgpu_mes_kernel_doorbell_free(adev, gang->process, queue->doorbell_off); amdgpu_mes_unlock(&adev->mes); diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h index 2053954..7c27e3a 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h @@ -27,6 +27,7 @@ #include "amdgpu_irq.h" #include "kgd_kfd_interface.h" #include "amdgpu_gfx.h" +#include "amdgpu_doorbell.h" #include #define AMDGPU_MES_MAX_COMPUTE_PIPES 8 @@ -128,6 +129,11 @@ struct amdgpu_mes { int (*kiq_hw_init)(struct amdgpu_device *adev); int (*kiq_hw_fini)(struct amdgpu_device *adev); + /* MES doorbells */ + uint32_t db_start_dw_offset; + uint32_t num_mes_dbs; + unsigned long *doorbell_bitmap; + /* ip specific functions */ const struct amdgpu_mes_funcs *funcs; }; -- 2.7.4