From: Lucas Stach Date: Fri, 5 Jul 2019 17:17:22 +0000 (+0200) Subject: drm/etnaviv: share a single cmdbuf suballoc region across all GPUs X-Git-Tag: v5.4-rc1~106^2~13^2~8 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=bffe5db81ae63ec75f5e09d1c97de42c37cb181e;p=thirdparty%2Fkernel%2Flinux.git drm/etnaviv: share a single cmdbuf suballoc region across all GPUs There is no need for each GPU to have it's own cmdbuf suballocation region. Only allocate a single one for the the etnaviv virtual device and share it across all GPUs. As the suballoc space is now potentially shared by more hardware jobs running in parallel, double its size to 512KB to avoid contention. Signed-off-by: Lucas Stach Reviewed-by: Philipp Zabel Reviewed-by: Guido Günther --- diff --git a/drivers/gpu/drm/etnaviv/etnaviv_cmdbuf.c b/drivers/gpu/drm/etnaviv/etnaviv_cmdbuf.c index e842d988edd40..b0babc0f72309 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_cmdbuf.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_cmdbuf.c @@ -13,13 +13,13 @@ #include "etnaviv_mmu.h" #include "etnaviv_perfmon.h" -#define SUBALLOC_SIZE SZ_256K +#define SUBALLOC_SIZE SZ_512K #define SUBALLOC_GRANULE SZ_4K #define SUBALLOC_GRANULES (SUBALLOC_SIZE / SUBALLOC_GRANULE) struct etnaviv_cmdbuf_suballoc { /* suballocated dma buffer properties */ - struct etnaviv_gpu *gpu; + struct device *dev; void *vaddr; dma_addr_t paddr; @@ -31,7 +31,7 @@ struct etnaviv_cmdbuf_suballoc { }; struct etnaviv_cmdbuf_suballoc * -etnaviv_cmdbuf_suballoc_new(struct etnaviv_gpu * gpu) +etnaviv_cmdbuf_suballoc_new(struct device *dev) { struct etnaviv_cmdbuf_suballoc *suballoc; int ret; @@ -40,11 +40,11 @@ etnaviv_cmdbuf_suballoc_new(struct etnaviv_gpu * gpu) if (!suballoc) return ERR_PTR(-ENOMEM); - suballoc->gpu = gpu; + suballoc->dev = dev; mutex_init(&suballoc->lock); init_waitqueue_head(&suballoc->free_event); - suballoc->vaddr = dma_alloc_wc(gpu->dev, SUBALLOC_SIZE, + suballoc->vaddr = dma_alloc_wc(dev, SUBALLOC_SIZE, &suballoc->paddr, GFP_KERNEL); if (!suballoc->vaddr) { ret = -ENOMEM; @@ -76,7 +76,7 @@ void etnaviv_cmdbuf_suballoc_unmap(struct etnaviv_iommu *mmu, void etnaviv_cmdbuf_suballoc_destroy(struct etnaviv_cmdbuf_suballoc *suballoc) { - dma_free_wc(suballoc->gpu->dev, SUBALLOC_SIZE, suballoc->vaddr, + dma_free_wc(suballoc->dev, SUBALLOC_SIZE, suballoc->vaddr, suballoc->paddr); kfree(suballoc); } @@ -101,7 +101,7 @@ retry: suballoc->free_space, msecs_to_jiffies(10 * 1000)); if (!ret) { - dev_err(suballoc->gpu->dev, + dev_err(suballoc->dev, "Timeout waiting for cmdbuf space\n"); return -ETIMEDOUT; } diff --git a/drivers/gpu/drm/etnaviv/etnaviv_cmdbuf.h b/drivers/gpu/drm/etnaviv/etnaviv_cmdbuf.h index 583f56bf011c6..a28668e46e269 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_cmdbuf.h +++ b/drivers/gpu/drm/etnaviv/etnaviv_cmdbuf.h @@ -8,7 +8,7 @@ #include -struct etnaviv_gpu; +struct device; struct etnaviv_iommu; struct etnaviv_vram_mapping; struct etnaviv_cmdbuf_suballoc; @@ -25,7 +25,7 @@ struct etnaviv_cmdbuf { }; struct etnaviv_cmdbuf_suballoc * -etnaviv_cmdbuf_suballoc_new(struct etnaviv_gpu * gpu); +etnaviv_cmdbuf_suballoc_new(struct device *dev); void etnaviv_cmdbuf_suballoc_destroy(struct etnaviv_cmdbuf_suballoc *suballoc); int etnaviv_cmdbuf_suballoc_map(struct etnaviv_cmdbuf_suballoc *suballoc, struct etnaviv_iommu *mmu, diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.c b/drivers/gpu/drm/etnaviv/etnaviv_drv.c index 9d4404723489d..5fa3aa7bdbc59 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_drv.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.c @@ -530,23 +530,32 @@ static int etnaviv_bind(struct device *dev) INIT_LIST_HEAD(&priv->gem_list); priv->num_gpus = 0; + priv->cmdbuf_suballoc = etnaviv_cmdbuf_suballoc_new(drm->dev); + if (IS_ERR(priv->cmdbuf_suballoc)) { + dev_err(drm->dev, "Failed to create cmdbuf suballocator\n"); + ret = PTR_ERR(priv->cmdbuf_suballoc); + goto out_free_priv; + } + dev_set_drvdata(dev, drm); ret = component_bind_all(dev, drm); if (ret < 0) - goto out_bind; + goto out_destroy_suballoc; load_gpu(drm); ret = drm_dev_register(drm, 0); if (ret) - goto out_register; + goto out_unbind; return 0; -out_register: +out_unbind: component_unbind_all(dev, drm); -out_bind: +out_destroy_suballoc: + etnaviv_cmdbuf_suballoc_destroy(priv->cmdbuf_suballoc); +out_free_priv: kfree(priv); out_put: drm_dev_put(drm); @@ -565,6 +574,8 @@ static void etnaviv_unbind(struct device *dev) dev->dma_parms = NULL; + etnaviv_cmdbuf_suballoc_destroy(priv->cmdbuf_suballoc); + drm->dev_private = NULL; kfree(priv); diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.h b/drivers/gpu/drm/etnaviv/etnaviv_drv.h index eabe394c4e254..e052d7db66aef 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_drv.h +++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.h @@ -36,6 +36,8 @@ struct etnaviv_drm_private { struct device_dma_parameters dma_parms; struct etnaviv_gpu *gpu[ETNA_MAX_PIPES]; + struct etnaviv_cmdbuf_suballoc *cmdbuf_suballoc; + /* list of GEM objects: */ struct mutex gem_lock; struct list_head gem_list; diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c index f535a627f2972..3f4f6ab388de8 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c @@ -496,7 +496,7 @@ int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data, goto err_submit_ww_acquire; } - ret = etnaviv_cmdbuf_init(gpu->cmdbuf_suballoc, &submit->cmdbuf, + ret = etnaviv_cmdbuf_init(priv->cmdbuf_suballoc, &submit->cmdbuf, ALIGN(args->stream_size, 8) + 8); if (ret) goto err_submit_objects; diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c index f00547b88a13a..179bc6c544ca0 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c @@ -693,6 +693,7 @@ static void etnaviv_gpu_hw_init(struct etnaviv_gpu *gpu) int etnaviv_gpu_init(struct etnaviv_gpu *gpu) { + struct etnaviv_drm_private *priv = gpu->drm->dev_private; int ret, i; ret = pm_runtime_get_sync(gpu->dev); @@ -760,23 +761,16 @@ int etnaviv_gpu_init(struct etnaviv_gpu *gpu) goto fail; } - gpu->cmdbuf_suballoc = etnaviv_cmdbuf_suballoc_new(gpu); - if (IS_ERR(gpu->cmdbuf_suballoc)) { - dev_err(gpu->dev, "Failed to create cmdbuf suballocator\n"); - ret = PTR_ERR(gpu->cmdbuf_suballoc); - goto destroy_iommu; - } - - ret = etnaviv_cmdbuf_suballoc_map(gpu->cmdbuf_suballoc, gpu->mmu, + ret = etnaviv_cmdbuf_suballoc_map(priv->cmdbuf_suballoc, gpu->mmu, &gpu->cmdbuf_mapping, gpu->memory_base); if (ret) { dev_err(gpu->dev, "failed to map cmdbuf suballoc\n"); - goto destroy_suballoc; + goto destroy_iommu; } /* Create buffer: */ - ret = etnaviv_cmdbuf_init(gpu->cmdbuf_suballoc, &gpu->buffer, + ret = etnaviv_cmdbuf_init(priv->cmdbuf_suballoc, &gpu->buffer, PAGE_SIZE); if (ret) { dev_err(gpu->dev, "could not create command buffer\n"); @@ -815,8 +809,6 @@ free_buffer: etnaviv_cmdbuf_free(&gpu->buffer); unmap_suballoc: etnaviv_cmdbuf_suballoc_unmap(gpu->mmu, &gpu->cmdbuf_mapping); -destroy_suballoc: - etnaviv_cmdbuf_suballoc_destroy(gpu->cmdbuf_suballoc); destroy_iommu: etnaviv_iommu_destroy(gpu->mmu); fail: @@ -1692,7 +1684,6 @@ static void etnaviv_gpu_unbind(struct device *dev, struct device *master, if (gpu->initialized) { etnaviv_cmdbuf_free(&gpu->buffer); etnaviv_cmdbuf_suballoc_unmap(gpu->mmu, &gpu->cmdbuf_mapping); - etnaviv_cmdbuf_suballoc_destroy(gpu->cmdbuf_suballoc); etnaviv_iommu_destroy(gpu->mmu); gpu->initialized = false; } diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.h b/drivers/gpu/drm/etnaviv/etnaviv_gpu.h index 6a6add350d2d7..933c8d016f113 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.h +++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.h @@ -137,7 +137,6 @@ struct etnaviv_gpu { int irq; struct etnaviv_iommu *mmu; - struct etnaviv_cmdbuf_suballoc *cmdbuf_suballoc; /* Power Control: */ struct clk *clk_bus;