+++ /dev/null
-From bc4661703d132ae1fb91d66641c64851eae44959 Mon Sep 17 00:00:00 2001
-From: Iago Toral Quiroga <itoral@igalia.com>
-Date: Tue, 3 Sep 2019 08:45:24 +0200
-Subject: [PATCH] drm/v3d: clean caches at the end of render jobs on
- request from user space
-
-Extends the user space ioctl for CL submissions so it can include a request
-to flush the cache once the CL execution has completed. Fixes memory
-write violation messages reported by the kernel in workloads involving
-shader memory writes (SSBOs, shader images, scratch, etc) which sometimes
-also lead to GPU resets during Piglit and CTS workloads.
-
-v2: if v3d_job_init() fails we need to kfree() the job instead of
- v3d_job_put() it (Eric Anholt).
-
-v3 (Eric Anholt):
- - Drop _FLAG suffix from the new flag name.
- - Add a new param so userspace can tell whether cache flushing is
- implemented in the kernel.
-
-Signed-off-by: Iago Toral Quiroga <itoral@igalia.com>
----
- drivers/gpu/drm/v3d/v3d_drv.c | 3 ++
- drivers/gpu/drm/v3d/v3d_gem.c | 54 +++++++++++++++++++++++++++++------
- include/uapi/drm/v3d_drm.h | 6 ++--
- 3 files changed, 53 insertions(+), 10 deletions(-)
-
---- a/drivers/gpu/drm/v3d/v3d_drv.c
-+++ b/drivers/gpu/drm/v3d/v3d_drv.c
-@@ -117,6 +117,9 @@ static int v3d_get_param_ioctl(struct dr
- case DRM_V3D_PARAM_SUPPORTS_CSD:
- args->value = v3d_has_csd(v3d);
- return 0;
-+ case DRM_V3D_PARAM_SUPPORTS_CACHE_FLUSH:
-+ args->value = 1;
-+ return 0;
- default:
- DRM_DEBUG("Unknown parameter %d\n", args->param);
- return -EINVAL;
---- a/drivers/gpu/drm/v3d/v3d_gem.c
-+++ b/drivers/gpu/drm/v3d/v3d_gem.c
-@@ -709,13 +709,16 @@ v3d_submit_cl_ioctl(struct drm_device *d
- struct drm_v3d_submit_cl *args = data;
- struct v3d_bin_job *bin = NULL;
- struct v3d_render_job *render;
-+ struct v3d_job *clean_job = NULL;
-+ struct v3d_job *last_job;
- struct ww_acquire_ctx acquire_ctx;
- int ret = 0;
-
- trace_v3d_submit_cl_ioctl(&v3d->drm, args->rcl_start, args->rcl_end);
-
-- if (args->pad != 0) {
-- DRM_INFO("pad must be zero: %d\n", args->pad);
-+ if (args->flags != 0 &&
-+ args->flags != DRM_V3D_SUBMIT_CL_FLUSH_CACHE) {
-+ DRM_INFO("invalid flags: %d\n", args->flags);
- return -EINVAL;
- }
-
-@@ -755,12 +758,31 @@ v3d_submit_cl_ioctl(struct drm_device *d
- bin->render = render;
- }
-
-- ret = v3d_lookup_bos(dev, file_priv, &render->base,
-+ if (args->flags & DRM_V3D_SUBMIT_CL_FLUSH_CACHE) {
-+ clean_job = kcalloc(1, sizeof(*clean_job), GFP_KERNEL);
-+ if (!clean_job) {
-+ ret = -ENOMEM;
-+ goto fail;
-+ }
-+
-+ ret = v3d_job_init(v3d, file_priv, clean_job, v3d_job_free, 0);
-+ if (ret) {
-+ kfree(clean_job);
-+ clean_job = NULL;
-+ goto fail;
-+ }
-+
-+ last_job = clean_job;
-+ } else {
-+ last_job = &render->base;
-+ }
-+
-+ ret = v3d_lookup_bos(dev, file_priv, last_job,
- args->bo_handles, args->bo_handle_count);
- if (ret)
- goto fail;
-
-- ret = v3d_lock_bo_reservations(&render->base, &acquire_ctx);
-+ ret = v3d_lock_bo_reservations(last_job, &acquire_ctx);
- if (ret)
- goto fail;
-
-@@ -772,33 +794,49 @@ v3d_submit_cl_ioctl(struct drm_device *d
-
- ret = v3d_add_dep(&render->base,
- dma_fence_get(bin->base.done_fence));
-+ if (ret)
-+ goto fail_unreserve;
- }
-
- ret = v3d_push_job(v3d_priv, &render->base, V3D_RENDER);
- if (ret)
- goto fail_unreserve;
-+
-+ if (clean_job) {
-+ ret = v3d_add_dep(clean_job,
-+ dma_fence_get(render->base.done_fence));
-+ if (ret)
-+ goto fail_unreserve;
-+ ret = v3d_push_job(v3d_priv, clean_job, V3D_CACHE_CLEAN);
-+ if (ret)
-+ goto fail_unreserve;
-+ }
- mutex_unlock(&v3d->sched_lock);
-
- v3d_attach_fences_and_unlock_reservation(file_priv,
-- &render->base,
-+ last_job,
- &acquire_ctx,
- args->out_sync,
-- render->base.done_fence);
-+ last_job->done_fence);
-
- if (bin)
- v3d_job_put(&bin->base);
- v3d_job_put(&render->base);
-+ if (clean_job)
-+ v3d_job_put(clean_job);
-
- return 0;
-
- fail_unreserve:
- mutex_unlock(&v3d->sched_lock);
-- v3d_unlock_bo_reservations(render->base.bo,
-- render->base.bo_count, &acquire_ctx);
-+ v3d_unlock_bo_reservations(last_job->bo,
-+ last_job->bo_count, &acquire_ctx);
- fail:
- if (bin)
- v3d_job_put(&bin->base);
- v3d_job_put(&render->base);
-+ if (clean_job)
-+ v3d_job_put(clean_job);
-
- return ret;
- }
---- a/include/uapi/drm/v3d_drm.h
-+++ b/include/uapi/drm/v3d_drm.h
-@@ -48,6 +48,8 @@ extern "C" {
- #define DRM_IOCTL_V3D_SUBMIT_TFU DRM_IOW(DRM_COMMAND_BASE + DRM_V3D_SUBMIT_TFU, struct drm_v3d_submit_tfu)
- #define DRM_IOCTL_V3D_SUBMIT_CSD DRM_IOW(DRM_COMMAND_BASE + DRM_V3D_SUBMIT_CSD, struct drm_v3d_submit_csd)
-
-+#define DRM_V3D_SUBMIT_CL_FLUSH_CACHE 0x01
-+
- /**
- * struct drm_v3d_submit_cl - ioctl argument for submitting commands to the 3D
- * engine.
-@@ -106,8 +108,7 @@ struct drm_v3d_submit_cl {
- /* Number of BO handles passed in (size is that times 4). */
- __u32 bo_handle_count;
-
-- /* Pad, must be zero-filled. */
-- __u32 pad;
-+ __u32 flags;
- };
-
- /**
-@@ -175,6 +176,7 @@ enum drm_v3d_param {
- DRM_V3D_PARAM_V3D_CORE0_IDENT2,
- DRM_V3D_PARAM_SUPPORTS_TFU,
- DRM_V3D_PARAM_SUPPORTS_CSD,
-+ DRM_V3D_PARAM_SUPPORTS_CACHE_FLUSH,
- };
-
- struct drm_v3d_get_param {
projects / openwrt / openwrt.git / blobdiff