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165 lines
4.7 KiB
Diff
165 lines
4.7 KiB
Diff
From 141da39c2ce8dbf77773c54182244c14d96b301d Mon Sep 17 00:00:00 2001
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From: Iago Toral Quiroga <itoral@igalia.com>
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Date: Tue, 3 Sep 2019 08:45:24 +0200
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Subject: [PATCH] drm/v3d: clean caches at the end of render jobs on
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request from user space
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Extends the user space ioctl for CL submissions so it can include a request
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to flush the cache once the CL execution has completed. Fixes memory
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write violation messages reported by the kernel in workloads involving
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shader memory writes (SSBOs, shader images, scratch, etc) which sometimes
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also lead to GPU resets during Piglit and CTS workloads.
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v2: if v3d_job_init() fails we need to kfree() the job instead of
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v3d_job_put() it (Eric Anholt).
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v3 (Eric Anholt):
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- Drop _FLAG suffix from the new flag name.
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- Add a new param so userspace can tell whether cache flushing is
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implemented in the kernel.
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Signed-off-by: Iago Toral Quiroga <itoral@igalia.com>
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---
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drivers/gpu/drm/v3d/v3d_drv.c | 3 +++
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drivers/gpu/drm/v3d/v3d_gem.c | 48 ++++++++++++++++++++++++++++++-----
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include/uapi/drm/v3d_drm.h | 6 +++--
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3 files changed, 49 insertions(+), 8 deletions(-)
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--- a/drivers/gpu/drm/v3d/v3d_drv.c
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+++ b/drivers/gpu/drm/v3d/v3d_drv.c
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@@ -120,6 +120,9 @@ static int v3d_get_param_ioctl(struct dr
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case DRM_V3D_PARAM_SUPPORTS_CSD:
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args->value = v3d_has_csd(v3d);
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return 0;
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+ case DRM_V3D_PARAM_SUPPORTS_CACHE_FLUSH:
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+ args->value = 1;
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+ return 0;
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default:
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DRM_DEBUG("Unknown parameter %d\n", args->param);
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return -EINVAL;
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--- a/drivers/gpu/drm/v3d/v3d_gem.c
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+++ b/drivers/gpu/drm/v3d/v3d_gem.c
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@@ -565,13 +565,16 @@ v3d_submit_cl_ioctl(struct drm_device *d
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struct drm_v3d_submit_cl *args = data;
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struct v3d_bin_job *bin = NULL;
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struct v3d_render_job *render;
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+ struct v3d_job *clean_job = NULL;
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+ struct v3d_job *last_job;
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struct ww_acquire_ctx acquire_ctx;
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int ret = 0;
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trace_v3d_submit_cl_ioctl(&v3d->drm, args->rcl_start, args->rcl_end);
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- if (args->pad != 0) {
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- DRM_INFO("pad must be zero: %d\n", args->pad);
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+ if (args->flags != 0 &&
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+ args->flags != DRM_V3D_SUBMIT_CL_FLUSH_CACHE) {
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+ DRM_INFO("invalid flags: %d\n", args->flags);
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return -EINVAL;
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}
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@@ -613,12 +616,31 @@ v3d_submit_cl_ioctl(struct drm_device *d
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bin->render = render;
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}
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- ret = v3d_lookup_bos(dev, file_priv, &render->base,
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+ if (args->flags & DRM_V3D_SUBMIT_CL_FLUSH_CACHE) {
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+ clean_job = kcalloc(1, sizeof(*clean_job), GFP_KERNEL);
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+ if (!clean_job) {
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+ ret = -ENOMEM;
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+ goto fail;
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+ }
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+
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+ ret = v3d_job_init(v3d, file_priv, clean_job, v3d_job_free, 0);
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+ if (ret) {
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+ kfree(clean_job);
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+ clean_job = NULL;
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+ goto fail;
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+ }
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+
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+ last_job = clean_job;
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+ } else {
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+ last_job = &render->base;
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+ }
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+
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+ ret = v3d_lookup_bos(dev, file_priv, last_job,
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args->bo_handles, args->bo_handle_count);
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if (ret)
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goto fail;
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- ret = v3d_lock_bo_reservations(&render->base, &acquire_ctx);
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+ ret = v3d_lock_bo_reservations(last_job, &acquire_ctx);
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if (ret)
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goto fail;
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@@ -637,17 +659,29 @@ v3d_submit_cl_ioctl(struct drm_device *d
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ret = v3d_push_job(v3d_priv, &render->base, V3D_RENDER);
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if (ret)
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goto fail_unreserve;
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+
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+ if (clean_job) {
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+ ret = drm_gem_fence_array_add(&clean_job->deps,
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+ dma_fence_get(render->base.done_fence));
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+ if (ret)
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+ goto fail_unreserve;
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+ ret = v3d_push_job(v3d_priv, clean_job, V3D_CACHE_CLEAN);
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+ if (ret)
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+ goto fail_unreserve;
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+ }
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mutex_unlock(&v3d->sched_lock);
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v3d_attach_fences_and_unlock_reservation(file_priv,
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- &render->base,
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+ last_job,
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&acquire_ctx,
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args->out_sync,
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- render->base.done_fence);
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+ last_job->done_fence);
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if (bin)
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v3d_job_put(&bin->base);
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v3d_job_put(&render->base);
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+ if (clean_job)
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+ v3d_job_put(clean_job);
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return 0;
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@@ -659,6 +693,8 @@ fail:
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if (bin)
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v3d_job_put(&bin->base);
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v3d_job_put(&render->base);
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+ if (clean_job)
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+ v3d_job_put(clean_job);
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return ret;
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}
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--- a/include/uapi/drm/v3d_drm.h
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+++ b/include/uapi/drm/v3d_drm.h
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@@ -48,6 +48,8 @@ extern "C" {
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#define DRM_IOCTL_V3D_SUBMIT_TFU DRM_IOW(DRM_COMMAND_BASE + DRM_V3D_SUBMIT_TFU, struct drm_v3d_submit_tfu)
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#define DRM_IOCTL_V3D_SUBMIT_CSD DRM_IOW(DRM_COMMAND_BASE + DRM_V3D_SUBMIT_CSD, struct drm_v3d_submit_csd)
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+#define DRM_V3D_SUBMIT_CL_FLUSH_CACHE 0x01
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+
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/**
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* struct drm_v3d_submit_cl - ioctl argument for submitting commands to the 3D
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* engine.
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@@ -124,8 +126,7 @@ struct drm_v3d_submit_cl {
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/* Number of BO handles passed in (size is that times 4). */
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__u32 bo_handle_count;
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- /* Pad, must be zero-filled. */
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- __u32 pad;
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+ __u32 flags;
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};
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/**
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@@ -193,6 +194,7 @@ enum drm_v3d_param {
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DRM_V3D_PARAM_V3D_CORE0_IDENT2,
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DRM_V3D_PARAM_SUPPORTS_TFU,
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DRM_V3D_PARAM_SUPPORTS_CSD,
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+ DRM_V3D_PARAM_SUPPORTS_CACHE_FLUSH,
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};
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struct drm_v3d_get_param {
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