Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 636 insertions, 0 deletions

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
new file mode 100644
index 000000000..2416c526f
--- /dev/null
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
@@ -0,0 +1,636 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2015 Etnaviv Project
+ */
+
+#include <drm/drm_file.h>
+#include <linux/dma-fence-array.h>
+#include <linux/file.h>
+#include <linux/pm_runtime.h>
+#include <linux/dma-resv.h>
+#include <linux/sync_file.h>
+#include <linux/uaccess.h>
+#include <linux/vmalloc.h>
+
+#include "etnaviv_cmdbuf.h"
+#include "etnaviv_drv.h"
+#include "etnaviv_gpu.h"
+#include "etnaviv_gem.h"
+#include "etnaviv_perfmon.h"
+#include "etnaviv_sched.h"
+
+/*
+ * Cmdstream submission:
+ */
+
+#define BO_INVALID_FLAGS ~(ETNA_SUBMIT_BO_READ | ETNA_SUBMIT_BO_WRITE)
+/* make sure these don't conflict w/ ETNAVIV_SUBMIT_BO_x */
+#define BO_LOCKED   0x4000
+#define BO_PINNED   0x2000
+
+static struct etnaviv_gem_submit *submit_create(struct drm_device *dev,
+		struct etnaviv_gpu *gpu, size_t nr_bos, size_t nr_pmrs)
+{
+	struct etnaviv_gem_submit *submit;
+	size_t sz = size_vstruct(nr_bos, sizeof(submit->bos[0]), sizeof(*submit));
+
+	submit = kzalloc(sz, GFP_KERNEL);
+	if (!submit)
+		return NULL;
+
+	submit->pmrs = kcalloc(nr_pmrs, sizeof(struct etnaviv_perfmon_request),
+			       GFP_KERNEL);
+	if (!submit->pmrs) {
+		kfree(submit);
+		return NULL;
+	}
+	submit->nr_pmrs = nr_pmrs;
+
+	submit->gpu = gpu;
+	kref_init(&submit->refcount);
+
+	return submit;
+}
+
+static int submit_lookup_objects(struct etnaviv_gem_submit *submit,
+	struct drm_file *file, struct drm_etnaviv_gem_submit_bo *submit_bos,
+	unsigned nr_bos)
+{
+	struct drm_etnaviv_gem_submit_bo *bo;
+	unsigned i;
+	int ret = 0;
+
+	spin_lock(&file->table_lock);
+
+	for (i = 0, bo = submit_bos; i < nr_bos; i++, bo++) {
+		struct drm_gem_object *obj;
+
+		if (bo->flags & BO_INVALID_FLAGS) {
+			DRM_ERROR("invalid flags: %x\n", bo->flags);
+			ret = -EINVAL;
+			goto out_unlock;
+		}
+
+		submit->bos[i].flags = bo->flags;
+		if (submit->flags & ETNA_SUBMIT_SOFTPIN) {
+			if (bo->presumed < ETNAVIV_SOFTPIN_START_ADDRESS) {
+				DRM_ERROR("invalid softpin address\n");
+				ret = -EINVAL;
+				goto out_unlock;
+			}
+			submit->bos[i].va = bo->presumed;
+		}
+
+		/* normally use drm_gem_object_lookup(), but for bulk lookup
+		 * all under single table_lock just hit object_idr directly:
+		 */
+		obj = idr_find(&file->object_idr, bo->handle);
+		if (!obj) {
+			DRM_ERROR("invalid handle %u at index %u\n",
+				  bo->handle, i);
+			ret = -EINVAL;
+			goto out_unlock;
+		}
+
+		/*
+		 * Take a refcount on the object. The file table lock
+		 * prevents the object_idr's refcount on this being dropped.
+		 */
+		drm_gem_object_get(obj);
+
+		submit->bos[i].obj = to_etnaviv_bo(obj);
+	}
+
+out_unlock:
+	submit->nr_bos = i;
+	spin_unlock(&file->table_lock);
+
+	return ret;
+}
+
+static void submit_unlock_object(struct etnaviv_gem_submit *submit, int i)
+{
+	if (submit->bos[i].flags & BO_LOCKED) {
+		struct drm_gem_object *obj = &submit->bos[i].obj->base;
+
+		dma_resv_unlock(obj->resv);
+		submit->bos[i].flags &= ~BO_LOCKED;
+	}
+}
+
+static int submit_lock_objects(struct etnaviv_gem_submit *submit,
+		struct ww_acquire_ctx *ticket)
+{
+	int contended, slow_locked = -1, i, ret = 0;
+
+retry:
+	for (i = 0; i < submit->nr_bos; i++) {
+		struct drm_gem_object *obj = &submit->bos[i].obj->base;
+
+		if (slow_locked == i)
+			slow_locked = -1;
+
+		contended = i;
+
+		if (!(submit->bos[i].flags & BO_LOCKED)) {
+			ret = dma_resv_lock_interruptible(obj->resv, ticket);
+			if (ret == -EALREADY)
+				DRM_ERROR("BO at index %u already on submit list\n",
+					  i);
+			if (ret)
+				goto fail;
+			submit->bos[i].flags |= BO_LOCKED;
+		}
+	}
+
+	ww_acquire_done(ticket);
+
+	return 0;
+
+fail:
+	for (; i >= 0; i--)
+		submit_unlock_object(submit, i);
+
+	if (slow_locked > 0)
+		submit_unlock_object(submit, slow_locked);
+
+	if (ret == -EDEADLK) {
+		struct drm_gem_object *obj;
+
+		obj = &submit->bos[contended].obj->base;
+
+		/* we lost out in a seqno race, lock and retry.. */
+		ret = dma_resv_lock_slow_interruptible(obj->resv, ticket);
+		if (!ret) {
+			submit->bos[contended].flags |= BO_LOCKED;
+			slow_locked = contended;
+			goto retry;
+		}
+	}
+
+	return ret;
+}
+
+static int submit_fence_sync(struct etnaviv_gem_submit *submit)
+{
+	int i, ret = 0;
+
+	for (i = 0; i < submit->nr_bos; i++) {
+		struct etnaviv_gem_submit_bo *bo = &submit->bos[i];
+		struct dma_resv *robj = bo->obj->base.resv;
+
+		ret = dma_resv_reserve_fences(robj, 1);
+		if (ret)
+			return ret;
+
+		if (submit->flags & ETNA_SUBMIT_NO_IMPLICIT)
+			continue;
+
+		ret = drm_sched_job_add_implicit_dependencies(&submit->sched_job,
+							      &bo->obj->base,
+							      bo->flags & ETNA_SUBMIT_BO_WRITE);
+		if (ret)
+			return ret;
+	}
+
+	return ret;
+}
+
+static void submit_attach_object_fences(struct etnaviv_gem_submit *submit)
+{
+	int i;
+
+	for (i = 0; i < submit->nr_bos; i++) {
+		struct drm_gem_object *obj = &submit->bos[i].obj->base;
+		bool write = submit->bos[i].flags & ETNA_SUBMIT_BO_WRITE;
+
+		dma_resv_add_fence(obj->resv, submit->out_fence, write ?
+				   DMA_RESV_USAGE_WRITE : DMA_RESV_USAGE_READ);
+		submit_unlock_object(submit, i);
+	}
+}
+
+static int submit_pin_objects(struct etnaviv_gem_submit *submit)
+{
+	int i, ret = 0;
+
+	for (i = 0; i < submit->nr_bos; i++) {
+		struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
+		struct etnaviv_vram_mapping *mapping;
+
+		mapping = etnaviv_gem_mapping_get(&etnaviv_obj->base,
+						  submit->mmu_context,
+						  submit->bos[i].va);
+		if (IS_ERR(mapping)) {
+			ret = PTR_ERR(mapping);
+			break;
+		}
+
+		if ((submit->flags & ETNA_SUBMIT_SOFTPIN) &&
+		     submit->bos[i].va != mapping->iova) {
+			etnaviv_gem_mapping_unreference(mapping);
+			return -EINVAL;
+		}
+
+		atomic_inc(&etnaviv_obj->gpu_active);
+
+		submit->bos[i].flags |= BO_PINNED;
+		submit->bos[i].mapping = mapping;
+	}
+
+	return ret;
+}
+
+static int submit_bo(struct etnaviv_gem_submit *submit, u32 idx,
+	struct etnaviv_gem_submit_bo **bo)
+{
+	if (idx >= submit->nr_bos) {
+		DRM_ERROR("invalid buffer index: %u (out of %u)\n",
+				idx, submit->nr_bos);
+		return -EINVAL;
+	}
+
+	*bo = &submit->bos[idx];
+
+	return 0;
+}
+
+/* process the reloc's and patch up the cmdstream as needed: */
+static int submit_reloc(struct etnaviv_gem_submit *submit, void *stream,
+		u32 size, const struct drm_etnaviv_gem_submit_reloc *relocs,
+		u32 nr_relocs)
+{
+	u32 i, last_offset = 0;
+	u32 *ptr = stream;
+	int ret;
+
+	/* Submits using softpin don't blend with relocs */
+	if ((submit->flags & ETNA_SUBMIT_SOFTPIN) && nr_relocs != 0)
+		return -EINVAL;
+
+	for (i = 0; i < nr_relocs; i++) {
+		const struct drm_etnaviv_gem_submit_reloc *r = relocs + i;
+		struct etnaviv_gem_submit_bo *bo;
+		u32 off;
+
+		if (unlikely(r->flags)) {
+			DRM_ERROR("invalid reloc flags\n");
+			return -EINVAL;
+		}
+
+		if (r->submit_offset % 4) {
+			DRM_ERROR("non-aligned reloc offset: %u\n",
+				  r->submit_offset);
+			return -EINVAL;
+		}
+
+		/* offset in dwords: */
+		off = r->submit_offset / 4;
+
+		if ((off >= size ) ||
+				(off < last_offset)) {
+			DRM_ERROR("invalid offset %u at reloc %u\n", off, i);
+			return -EINVAL;
+		}
+
+		ret = submit_bo(submit, r->reloc_idx, &bo);
+		if (ret)
+			return ret;
+
+		if (r->reloc_offset > bo->obj->base.size - sizeof(*ptr)) {
+			DRM_ERROR("relocation %u outside object\n", i);
+			return -EINVAL;
+		}
+
+		ptr[off] = bo->mapping->iova + r->reloc_offset;
+
+		last_offset = off;
+	}
+
+	return 0;
+}
+
+static int submit_perfmon_validate(struct etnaviv_gem_submit *submit,
+		u32 exec_state, const struct drm_etnaviv_gem_submit_pmr *pmrs)
+{
+	u32 i;
+
+	for (i = 0; i < submit->nr_pmrs; i++) {
+		const struct drm_etnaviv_gem_submit_pmr *r = pmrs + i;
+		struct etnaviv_gem_submit_bo *bo;
+		int ret;
+
+		ret = submit_bo(submit, r->read_idx, &bo);
+		if (ret)
+			return ret;
+
+		/* at offset 0 a sequence number gets stored used for userspace sync */
+		if (r->read_offset == 0) {
+			DRM_ERROR("perfmon request: offset is 0");
+			return -EINVAL;
+		}
+
+		if (r->read_offset >= bo->obj->base.size - sizeof(u32)) {
+			DRM_ERROR("perfmon request: offset %u outside object", i);
+			return -EINVAL;
+		}
+
+		if (r->flags & ~(ETNA_PM_PROCESS_PRE | ETNA_PM_PROCESS_POST)) {
+			DRM_ERROR("perfmon request: flags are not valid");
+			return -EINVAL;
+		}
+
+		if (etnaviv_pm_req_validate(r, exec_state)) {
+			DRM_ERROR("perfmon request: domain or signal not valid");
+			return -EINVAL;
+		}
+
+		submit->pmrs[i].flags = r->flags;
+		submit->pmrs[i].domain = r->domain;
+		submit->pmrs[i].signal = r->signal;
+		submit->pmrs[i].sequence = r->sequence;
+		submit->pmrs[i].offset = r->read_offset;
+		submit->pmrs[i].bo_vma = etnaviv_gem_vmap(&bo->obj->base);
+	}
+
+	return 0;
+}
+
+static void submit_cleanup(struct kref *kref)
+{
+	struct etnaviv_gem_submit *submit =
+			container_of(kref, struct etnaviv_gem_submit, refcount);
+	unsigned i;
+
+	if (submit->cmdbuf.suballoc)
+		etnaviv_cmdbuf_free(&submit->cmdbuf);
+
+	if (submit->mmu_context)
+		etnaviv_iommu_context_put(submit->mmu_context);
+
+	if (submit->prev_mmu_context)
+		etnaviv_iommu_context_put(submit->prev_mmu_context);
+
+	for (i = 0; i < submit->nr_bos; i++) {
+		struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
+
+		/* unpin all objects */
+		if (submit->bos[i].flags & BO_PINNED) {
+			etnaviv_gem_mapping_unreference(submit->bos[i].mapping);
+			atomic_dec(&etnaviv_obj->gpu_active);
+			submit->bos[i].mapping = NULL;
+			submit->bos[i].flags &= ~BO_PINNED;
+		}
+
+		/* if the GPU submit failed, objects might still be locked */
+		submit_unlock_object(submit, i);
+		drm_gem_object_put(&etnaviv_obj->base);
+	}
+
+	wake_up_all(&submit->gpu->fence_event);
+
+	if (submit->out_fence) {
+		/*
+		 * Remove from user fence array before dropping the reference,
+		 * so fence can not be found in lookup anymore.
+		 */
+		xa_erase(&submit->gpu->user_fences, submit->out_fence_id);
+		dma_fence_put(submit->out_fence);
+	}
+
+	put_pid(submit->pid);
+
+	kfree(submit->pmrs);
+	kfree(submit);
+}
+
+void etnaviv_submit_put(struct etnaviv_gem_submit *submit)
+{
+	kref_put(&submit->refcount, submit_cleanup);
+}
+
+int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data,
+		struct drm_file *file)
+{
+	struct etnaviv_file_private *ctx = file->driver_priv;
+	struct etnaviv_drm_private *priv = dev->dev_private;
+	struct drm_etnaviv_gem_submit *args = data;
+	struct drm_etnaviv_gem_submit_reloc *relocs;
+	struct drm_etnaviv_gem_submit_pmr *pmrs;
+	struct drm_etnaviv_gem_submit_bo *bos;
+	struct etnaviv_gem_submit *submit;
+	struct etnaviv_gpu *gpu;
+	struct sync_file *sync_file = NULL;
+	struct ww_acquire_ctx ticket;
+	int out_fence_fd = -1;
+	struct pid *pid = get_pid(task_pid(current));
+	void *stream;
+	int ret;
+
+	if (args->pipe >= ETNA_MAX_PIPES)
+		return -EINVAL;
+
+	gpu = priv->gpu[args->pipe];
+	if (!gpu)
+		return -ENXIO;
+
+	if (args->stream_size % 4) {
+		DRM_ERROR("non-aligned cmdstream buffer size: %u\n",
+			  args->stream_size);
+		return -EINVAL;
+	}
+
+	if (args->exec_state != ETNA_PIPE_3D &&
+	    args->exec_state != ETNA_PIPE_2D &&
+	    args->exec_state != ETNA_PIPE_VG) {
+		DRM_ERROR("invalid exec_state: 0x%x\n", args->exec_state);
+		return -EINVAL;
+	}
+
+	if (args->flags & ~ETNA_SUBMIT_FLAGS) {
+		DRM_ERROR("invalid flags: 0x%x\n", args->flags);
+		return -EINVAL;
+	}
+
+	if ((args->flags & ETNA_SUBMIT_SOFTPIN) &&
+	    priv->mmu_global->version != ETNAVIV_IOMMU_V2) {
+		DRM_ERROR("softpin requested on incompatible MMU\n");
+		return -EINVAL;
+	}
+
+	if (args->stream_size > SZ_128K || args->nr_relocs > SZ_128K ||
+	    args->nr_bos > SZ_128K || args->nr_pmrs > 128) {
+		DRM_ERROR("submit arguments out of size limits\n");
+		return -EINVAL;
+	}
+
+	/*
+	 * Copy the command submission and bo array to kernel space in
+	 * one go, and do this outside of any locks.
+	 */
+	bos = kvmalloc_array(args->nr_bos, sizeof(*bos), GFP_KERNEL);
+	relocs = kvmalloc_array(args->nr_relocs, sizeof(*relocs), GFP_KERNEL);
+	pmrs = kvmalloc_array(args->nr_pmrs, sizeof(*pmrs), GFP_KERNEL);
+	stream = kvmalloc_array(1, args->stream_size, GFP_KERNEL);
+	if (!bos || !relocs || !pmrs || !stream) {
+		ret = -ENOMEM;
+		goto err_submit_cmds;
+	}
+
+	ret = copy_from_user(bos, u64_to_user_ptr(args->bos),
+			     args->nr_bos * sizeof(*bos));
+	if (ret) {
+		ret = -EFAULT;
+		goto err_submit_cmds;
+	}
+
+	ret = copy_from_user(relocs, u64_to_user_ptr(args->relocs),
+			     args->nr_relocs * sizeof(*relocs));
+	if (ret) {
+		ret = -EFAULT;
+		goto err_submit_cmds;
+	}
+
+	ret = copy_from_user(pmrs, u64_to_user_ptr(args->pmrs),
+			     args->nr_pmrs * sizeof(*pmrs));
+	if (ret) {
+		ret = -EFAULT;
+		goto err_submit_cmds;
+	}
+
+	ret = copy_from_user(stream, u64_to_user_ptr(args->stream),
+			     args->stream_size);
+	if (ret) {
+		ret = -EFAULT;
+		goto err_submit_cmds;
+	}
+
+	if (args->flags & ETNA_SUBMIT_FENCE_FD_OUT) {
+		out_fence_fd = get_unused_fd_flags(O_CLOEXEC);
+		if (out_fence_fd < 0) {
+			ret = out_fence_fd;
+			goto err_submit_cmds;
+		}
+	}
+
+	ww_acquire_init(&ticket, &reservation_ww_class);
+
+	submit = submit_create(dev, gpu, args->nr_bos, args->nr_pmrs);
+	if (!submit) {
+		ret = -ENOMEM;
+		goto err_submit_ww_acquire;
+	}
+
+	submit->pid = pid;
+
+	ret = etnaviv_cmdbuf_init(priv->cmdbuf_suballoc, &submit->cmdbuf,
+				  ALIGN(args->stream_size, 8) + 8);
+	if (ret)
+		goto err_submit_put;
+
+	submit->ctx = file->driver_priv;
+	submit->mmu_context = etnaviv_iommu_context_get(submit->ctx->mmu);
+	submit->exec_state = args->exec_state;
+	submit->flags = args->flags;
+
+	ret = drm_sched_job_init(&submit->sched_job,
+				 &ctx->sched_entity[args->pipe],
+				 submit->ctx);
+	if (ret)
+		goto err_submit_put;
+
+	ret = submit_lookup_objects(submit, file, bos, args->nr_bos);
+	if (ret)
+		goto err_submit_job;
+
+	if ((priv->mmu_global->version != ETNAVIV_IOMMU_V2) &&
+	    !etnaviv_cmd_validate_one(gpu, stream, args->stream_size / 4,
+				      relocs, args->nr_relocs)) {
+		ret = -EINVAL;
+		goto err_submit_job;
+	}
+
+	if (args->flags & ETNA_SUBMIT_FENCE_FD_IN) {
+		struct dma_fence *in_fence = sync_file_get_fence(args->fence_fd);
+		if (!in_fence) {
+			ret = -EINVAL;
+			goto err_submit_job;
+		}
+
+		ret = drm_sched_job_add_dependency(&submit->sched_job,
+						   in_fence);
+		if (ret)
+			goto err_submit_job;
+	}
+
+	ret = submit_pin_objects(submit);
+	if (ret)
+		goto err_submit_job;
+
+	ret = submit_reloc(submit, stream, args->stream_size / 4,
+			   relocs, args->nr_relocs);
+	if (ret)
+		goto err_submit_job;
+
+	ret = submit_perfmon_validate(submit, args->exec_state, pmrs);
+	if (ret)
+		goto err_submit_job;
+
+	memcpy(submit->cmdbuf.vaddr, stream, args->stream_size);
+
+	ret = submit_lock_objects(submit, &ticket);
+	if (ret)
+		goto err_submit_job;
+
+	ret = submit_fence_sync(submit);
+	if (ret)
+		goto err_submit_job;
+
+	ret = etnaviv_sched_push_job(submit);
+	if (ret)
+		goto err_submit_job;
+
+	submit_attach_object_fences(submit);
+
+	if (args->flags & ETNA_SUBMIT_FENCE_FD_OUT) {
+		/*
+		 * This can be improved: ideally we want to allocate the sync
+		 * file before kicking off the GPU job and just attach the
+		 * fence to the sync file here, eliminating the ENOMEM
+		 * possibility at this stage.
+		 */
+		sync_file = sync_file_create(submit->out_fence);
+		if (!sync_file) {
+			ret = -ENOMEM;
+			/*
+			 * When this late error is hit, the submit has already
+			 * been handed over to the scheduler. At this point
+			 * the sched_job must not be cleaned up.
+			 */
+			goto err_submit_put;
+		}
+		fd_install(out_fence_fd, sync_file->file);
+	}
+
+	args->fence_fd = out_fence_fd;
+	args->fence = submit->out_fence_id;
+
+err_submit_job:
+	if (ret)
+		drm_sched_job_cleanup(&submit->sched_job);
+err_submit_put:
+	etnaviv_submit_put(submit);
+
+err_submit_ww_acquire:
+	ww_acquire_fini(&ticket);
+
+err_submit_cmds:
+	if (ret && (out_fence_fd >= 0))
+		put_unused_fd(out_fence_fd);
+	kvfree(stream);
+	kvfree(bos);
+	kvfree(relocs);
+	kvfree(pmrs);
+
+	return ret;
+}