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path: root/drivers/gpu/drm/tegra/submit.c
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Diffstat (limited to 'drivers/gpu/drm/tegra/submit.c')
-rw-r--r--drivers/gpu/drm/tegra/submit.c698
1 files changed, 698 insertions, 0 deletions
diff --git a/drivers/gpu/drm/tegra/submit.c b/drivers/gpu/drm/tegra/submit.c
new file mode 100644
index 000000000..b24738bdf
--- /dev/null
+++ b/drivers/gpu/drm/tegra/submit.c
@@ -0,0 +1,698 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright (c) 2020 NVIDIA Corporation */
+
+#include <linux/dma-fence-array.h>
+#include <linux/dma-mapping.h>
+#include <linux/file.h>
+#include <linux/host1x.h>
+#include <linux/iommu.h>
+#include <linux/kref.h>
+#include <linux/list.h>
+#include <linux/nospec.h>
+#include <linux/pm_runtime.h>
+#include <linux/scatterlist.h>
+#include <linux/slab.h>
+#include <linux/sync_file.h>
+
+#include <drm/drm_drv.h>
+#include <drm/drm_file.h>
+#include <drm/drm_syncobj.h>
+
+#include "drm.h"
+#include "gem.h"
+#include "submit.h"
+#include "uapi.h"
+
+#define SUBMIT_ERR(context, fmt, ...) \
+ dev_err_ratelimited(context->client->base.dev, \
+ "%s: job submission failed: " fmt "\n", \
+ current->comm, ##__VA_ARGS__)
+
+struct gather_bo {
+ struct host1x_bo base;
+
+ struct kref ref;
+
+ struct device *dev;
+ u32 *gather_data;
+ dma_addr_t gather_data_dma;
+ size_t gather_data_words;
+};
+
+static struct host1x_bo *gather_bo_get(struct host1x_bo *host_bo)
+{
+ struct gather_bo *bo = container_of(host_bo, struct gather_bo, base);
+
+ kref_get(&bo->ref);
+
+ return host_bo;
+}
+
+static void gather_bo_release(struct kref *ref)
+{
+ struct gather_bo *bo = container_of(ref, struct gather_bo, ref);
+
+ dma_free_attrs(bo->dev, bo->gather_data_words * 4, bo->gather_data, bo->gather_data_dma,
+ 0);
+ kfree(bo);
+}
+
+static void gather_bo_put(struct host1x_bo *host_bo)
+{
+ struct gather_bo *bo = container_of(host_bo, struct gather_bo, base);
+
+ kref_put(&bo->ref, gather_bo_release);
+}
+
+static struct host1x_bo_mapping *
+gather_bo_pin(struct device *dev, struct host1x_bo *bo, enum dma_data_direction direction)
+{
+ struct gather_bo *gather = container_of(bo, struct gather_bo, base);
+ struct host1x_bo_mapping *map;
+ int err;
+
+ map = kzalloc(sizeof(*map), GFP_KERNEL);
+ if (!map)
+ return ERR_PTR(-ENOMEM);
+
+ kref_init(&map->ref);
+ map->bo = host1x_bo_get(bo);
+ map->direction = direction;
+ map->dev = dev;
+
+ map->sgt = kzalloc(sizeof(*map->sgt), GFP_KERNEL);
+ if (!map->sgt) {
+ err = -ENOMEM;
+ goto free;
+ }
+
+ err = dma_get_sgtable(gather->dev, map->sgt, gather->gather_data, gather->gather_data_dma,
+ gather->gather_data_words * 4);
+ if (err)
+ goto free_sgt;
+
+ err = dma_map_sgtable(dev, map->sgt, direction, 0);
+ if (err)
+ goto free_sgt;
+
+ map->phys = sg_dma_address(map->sgt->sgl);
+ map->size = gather->gather_data_words * 4;
+ map->chunks = err;
+
+ return map;
+
+free_sgt:
+ sg_free_table(map->sgt);
+ kfree(map->sgt);
+free:
+ kfree(map);
+ return ERR_PTR(err);
+}
+
+static void gather_bo_unpin(struct host1x_bo_mapping *map)
+{
+ if (!map)
+ return;
+
+ dma_unmap_sgtable(map->dev, map->sgt, map->direction, 0);
+ sg_free_table(map->sgt);
+ kfree(map->sgt);
+ host1x_bo_put(map->bo);
+
+ kfree(map);
+}
+
+static void *gather_bo_mmap(struct host1x_bo *host_bo)
+{
+ struct gather_bo *bo = container_of(host_bo, struct gather_bo, base);
+
+ return bo->gather_data;
+}
+
+static void gather_bo_munmap(struct host1x_bo *host_bo, void *addr)
+{
+}
+
+const struct host1x_bo_ops gather_bo_ops = {
+ .get = gather_bo_get,
+ .put = gather_bo_put,
+ .pin = gather_bo_pin,
+ .unpin = gather_bo_unpin,
+ .mmap = gather_bo_mmap,
+ .munmap = gather_bo_munmap,
+};
+
+static struct tegra_drm_mapping *
+tegra_drm_mapping_get(struct tegra_drm_context *context, u32 id)
+{
+ struct tegra_drm_mapping *mapping;
+
+ xa_lock(&context->mappings);
+
+ mapping = xa_load(&context->mappings, id);
+ if (mapping)
+ kref_get(&mapping->ref);
+
+ xa_unlock(&context->mappings);
+
+ return mapping;
+}
+
+static void *alloc_copy_user_array(void __user *from, size_t count, size_t size)
+{
+ size_t copy_len;
+ void *data;
+
+ if (check_mul_overflow(count, size, &copy_len))
+ return ERR_PTR(-EINVAL);
+
+ if (copy_len > 0x4000)
+ return ERR_PTR(-E2BIG);
+
+ data = kvmalloc(copy_len, GFP_KERNEL);
+ if (!data)
+ return ERR_PTR(-ENOMEM);
+
+ if (copy_from_user(data, from, copy_len)) {
+ kvfree(data);
+ return ERR_PTR(-EFAULT);
+ }
+
+ return data;
+}
+
+static int submit_copy_gather_data(struct gather_bo **pbo, struct device *dev,
+ struct tegra_drm_context *context,
+ struct drm_tegra_channel_submit *args)
+{
+ struct gather_bo *bo;
+ size_t copy_len;
+
+ if (args->gather_data_words == 0) {
+ SUBMIT_ERR(context, "gather_data_words cannot be zero");
+ return -EINVAL;
+ }
+
+ if (check_mul_overflow((size_t)args->gather_data_words, (size_t)4, &copy_len)) {
+ SUBMIT_ERR(context, "gather_data_words is too large");
+ return -EINVAL;
+ }
+
+ bo = kzalloc(sizeof(*bo), GFP_KERNEL);
+ if (!bo) {
+ SUBMIT_ERR(context, "failed to allocate memory for bo info");
+ return -ENOMEM;
+ }
+
+ host1x_bo_init(&bo->base, &gather_bo_ops);
+ kref_init(&bo->ref);
+ bo->dev = dev;
+
+ bo->gather_data = dma_alloc_attrs(dev, copy_len, &bo->gather_data_dma,
+ GFP_KERNEL | __GFP_NOWARN, 0);
+ if (!bo->gather_data) {
+ SUBMIT_ERR(context, "failed to allocate memory for gather data");
+ kfree(bo);
+ return -ENOMEM;
+ }
+
+ if (copy_from_user(bo->gather_data, u64_to_user_ptr(args->gather_data_ptr), copy_len)) {
+ SUBMIT_ERR(context, "failed to copy gather data from userspace");
+ dma_free_attrs(dev, copy_len, bo->gather_data, bo->gather_data_dma, 0);
+ kfree(bo);
+ return -EFAULT;
+ }
+
+ bo->gather_data_words = args->gather_data_words;
+
+ *pbo = bo;
+
+ return 0;
+}
+
+static int submit_write_reloc(struct tegra_drm_context *context, struct gather_bo *bo,
+ struct drm_tegra_submit_buf *buf, struct tegra_drm_mapping *mapping)
+{
+ /* TODO check that target_offset is within bounds */
+ dma_addr_t iova = mapping->iova + buf->reloc.target_offset;
+ u32 written_ptr;
+
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
+ if (buf->flags & DRM_TEGRA_SUBMIT_RELOC_SECTOR_LAYOUT)
+ iova |= BIT_ULL(39);
+#endif
+
+ written_ptr = iova >> buf->reloc.shift;
+
+ if (buf->reloc.gather_offset_words >= bo->gather_data_words) {
+ SUBMIT_ERR(context,
+ "relocation has too large gather offset (%u vs gather length %zu)",
+ buf->reloc.gather_offset_words, bo->gather_data_words);
+ return -EINVAL;
+ }
+
+ buf->reloc.gather_offset_words = array_index_nospec(buf->reloc.gather_offset_words,
+ bo->gather_data_words);
+
+ bo->gather_data[buf->reloc.gather_offset_words] = written_ptr;
+
+ return 0;
+}
+
+static int submit_process_bufs(struct tegra_drm_context *context, struct gather_bo *bo,
+ struct drm_tegra_channel_submit *args,
+ struct tegra_drm_submit_data *job_data)
+{
+ struct tegra_drm_used_mapping *mappings;
+ struct drm_tegra_submit_buf *bufs;
+ int err;
+ u32 i;
+
+ bufs = alloc_copy_user_array(u64_to_user_ptr(args->bufs_ptr), args->num_bufs,
+ sizeof(*bufs));
+ if (IS_ERR(bufs)) {
+ SUBMIT_ERR(context, "failed to copy bufs array from userspace");
+ return PTR_ERR(bufs);
+ }
+
+ mappings = kcalloc(args->num_bufs, sizeof(*mappings), GFP_KERNEL);
+ if (!mappings) {
+ SUBMIT_ERR(context, "failed to allocate memory for mapping info");
+ err = -ENOMEM;
+ goto done;
+ }
+
+ for (i = 0; i < args->num_bufs; i++) {
+ struct drm_tegra_submit_buf *buf = &bufs[i];
+ struct tegra_drm_mapping *mapping;
+
+ if (buf->flags & ~DRM_TEGRA_SUBMIT_RELOC_SECTOR_LAYOUT) {
+ SUBMIT_ERR(context, "invalid flag specified for buffer");
+ err = -EINVAL;
+ goto drop_refs;
+ }
+
+ mapping = tegra_drm_mapping_get(context, buf->mapping);
+ if (!mapping) {
+ SUBMIT_ERR(context, "invalid mapping ID '%u' for buffer", buf->mapping);
+ err = -EINVAL;
+ goto drop_refs;
+ }
+
+ err = submit_write_reloc(context, bo, buf, mapping);
+ if (err) {
+ tegra_drm_mapping_put(mapping);
+ goto drop_refs;
+ }
+
+ mappings[i].mapping = mapping;
+ mappings[i].flags = buf->flags;
+ }
+
+ job_data->used_mappings = mappings;
+ job_data->num_used_mappings = i;
+
+ err = 0;
+
+ goto done;
+
+drop_refs:
+ while (i--)
+ tegra_drm_mapping_put(mappings[i].mapping);
+
+ kfree(mappings);
+ job_data->used_mappings = NULL;
+
+done:
+ kvfree(bufs);
+
+ return err;
+}
+
+static int submit_get_syncpt(struct tegra_drm_context *context, struct host1x_job *job,
+ struct xarray *syncpoints, struct drm_tegra_channel_submit *args)
+{
+ struct host1x_syncpt *sp;
+
+ if (args->syncpt.flags) {
+ SUBMIT_ERR(context, "invalid flag specified for syncpt");
+ return -EINVAL;
+ }
+
+ /* Syncpt ref will be dropped on job release */
+ sp = xa_load(syncpoints, args->syncpt.id);
+ if (!sp) {
+ SUBMIT_ERR(context, "syncpoint specified in syncpt was not allocated");
+ return -EINVAL;
+ }
+
+ job->syncpt = host1x_syncpt_get(sp);
+ job->syncpt_incrs = args->syncpt.increments;
+
+ return 0;
+}
+
+static int submit_job_add_gather(struct host1x_job *job, struct tegra_drm_context *context,
+ struct drm_tegra_submit_cmd_gather_uptr *cmd,
+ struct gather_bo *bo, u32 *offset,
+ struct tegra_drm_submit_data *job_data,
+ u32 *class)
+{
+ u32 next_offset;
+
+ if (cmd->reserved[0] || cmd->reserved[1] || cmd->reserved[2]) {
+ SUBMIT_ERR(context, "non-zero reserved field in GATHER_UPTR command");
+ return -EINVAL;
+ }
+
+ /* Check for maximum gather size */
+ if (cmd->words > 16383) {
+ SUBMIT_ERR(context, "too many words in GATHER_UPTR command");
+ return -EINVAL;
+ }
+
+ if (check_add_overflow(*offset, cmd->words, &next_offset)) {
+ SUBMIT_ERR(context, "too many total words in job");
+ return -EINVAL;
+ }
+
+ if (next_offset > bo->gather_data_words) {
+ SUBMIT_ERR(context, "GATHER_UPTR command overflows gather data");
+ return -EINVAL;
+ }
+
+ if (tegra_drm_fw_validate(context->client, bo->gather_data, *offset,
+ cmd->words, job_data, class)) {
+ SUBMIT_ERR(context, "job was rejected by firewall");
+ return -EINVAL;
+ }
+
+ host1x_job_add_gather(job, &bo->base, cmd->words, *offset * 4);
+
+ *offset = next_offset;
+
+ return 0;
+}
+
+static struct host1x_job *
+submit_create_job(struct tegra_drm_context *context, struct gather_bo *bo,
+ struct drm_tegra_channel_submit *args, struct tegra_drm_submit_data *job_data,
+ struct xarray *syncpoints)
+{
+ struct drm_tegra_submit_cmd *cmds;
+ u32 i, gather_offset = 0, class;
+ struct host1x_job *job;
+ int err;
+
+ /* Set initial class for firewall. */
+ class = context->client->base.class;
+
+ cmds = alloc_copy_user_array(u64_to_user_ptr(args->cmds_ptr), args->num_cmds,
+ sizeof(*cmds));
+ if (IS_ERR(cmds)) {
+ SUBMIT_ERR(context, "failed to copy cmds array from userspace");
+ return ERR_CAST(cmds);
+ }
+
+ job = host1x_job_alloc(context->channel, args->num_cmds, 0, true);
+ if (!job) {
+ SUBMIT_ERR(context, "failed to allocate memory for job");
+ job = ERR_PTR(-ENOMEM);
+ goto done;
+ }
+
+ err = submit_get_syncpt(context, job, syncpoints, args);
+ if (err < 0)
+ goto free_job;
+
+ job->client = &context->client->base;
+ job->class = context->client->base.class;
+ job->serialize = true;
+
+ for (i = 0; i < args->num_cmds; i++) {
+ struct drm_tegra_submit_cmd *cmd = &cmds[i];
+
+ if (cmd->flags) {
+ SUBMIT_ERR(context, "unknown flags given for cmd");
+ err = -EINVAL;
+ goto free_job;
+ }
+
+ if (cmd->type == DRM_TEGRA_SUBMIT_CMD_GATHER_UPTR) {
+ err = submit_job_add_gather(job, context, &cmd->gather_uptr, bo,
+ &gather_offset, job_data, &class);
+ if (err)
+ goto free_job;
+ } else if (cmd->type == DRM_TEGRA_SUBMIT_CMD_WAIT_SYNCPT) {
+ if (cmd->wait_syncpt.reserved[0] || cmd->wait_syncpt.reserved[1]) {
+ SUBMIT_ERR(context, "non-zero reserved value");
+ err = -EINVAL;
+ goto free_job;
+ }
+
+ host1x_job_add_wait(job, cmd->wait_syncpt.id, cmd->wait_syncpt.value,
+ false, class);
+ } else if (cmd->type == DRM_TEGRA_SUBMIT_CMD_WAIT_SYNCPT_RELATIVE) {
+ if (cmd->wait_syncpt.reserved[0] || cmd->wait_syncpt.reserved[1]) {
+ SUBMIT_ERR(context, "non-zero reserved value");
+ err = -EINVAL;
+ goto free_job;
+ }
+
+ if (cmd->wait_syncpt.id != args->syncpt.id) {
+ SUBMIT_ERR(context, "syncpoint ID in CMD_WAIT_SYNCPT_RELATIVE is not used by the job");
+ err = -EINVAL;
+ goto free_job;
+ }
+
+ host1x_job_add_wait(job, cmd->wait_syncpt.id, cmd->wait_syncpt.value,
+ true, class);
+ } else {
+ SUBMIT_ERR(context, "unknown cmd type");
+ err = -EINVAL;
+ goto free_job;
+ }
+ }
+
+ if (gather_offset == 0) {
+ SUBMIT_ERR(context, "job must have at least one gather");
+ err = -EINVAL;
+ goto free_job;
+ }
+
+ goto done;
+
+free_job:
+ host1x_job_put(job);
+ job = ERR_PTR(err);
+
+done:
+ kvfree(cmds);
+
+ return job;
+}
+
+static void release_job(struct host1x_job *job)
+{
+ struct tegra_drm_client *client = container_of(job->client, struct tegra_drm_client, base);
+ struct tegra_drm_submit_data *job_data = job->user_data;
+ u32 i;
+
+ if (job->memory_context)
+ host1x_memory_context_put(job->memory_context);
+
+ for (i = 0; i < job_data->num_used_mappings; i++)
+ tegra_drm_mapping_put(job_data->used_mappings[i].mapping);
+
+ kfree(job_data->used_mappings);
+ kfree(job_data);
+
+ pm_runtime_mark_last_busy(client->base.dev);
+ pm_runtime_put_autosuspend(client->base.dev);
+}
+
+int tegra_drm_ioctl_channel_submit(struct drm_device *drm, void *data,
+ struct drm_file *file)
+{
+ struct tegra_drm_file *fpriv = file->driver_priv;
+ struct drm_tegra_channel_submit *args = data;
+ struct tegra_drm_submit_data *job_data;
+ struct drm_syncobj *syncobj = NULL;
+ struct tegra_drm_context *context;
+ struct host1x_job *job;
+ struct gather_bo *bo;
+ u32 i;
+ int err;
+
+ mutex_lock(&fpriv->lock);
+
+ context = xa_load(&fpriv->contexts, args->context);
+ if (!context) {
+ mutex_unlock(&fpriv->lock);
+ pr_err_ratelimited("%s: %s: invalid channel context '%#x'", __func__,
+ current->comm, args->context);
+ return -EINVAL;
+ }
+
+ if (args->syncobj_in) {
+ struct dma_fence *fence;
+
+ err = drm_syncobj_find_fence(file, args->syncobj_in, 0, 0, &fence);
+ if (err) {
+ SUBMIT_ERR(context, "invalid syncobj_in '%#x'", args->syncobj_in);
+ goto unlock;
+ }
+
+ err = dma_fence_wait_timeout(fence, true, msecs_to_jiffies(10000));
+ dma_fence_put(fence);
+ if (err) {
+ SUBMIT_ERR(context, "wait for syncobj_in timed out");
+ goto unlock;
+ }
+ }
+
+ if (args->syncobj_out) {
+ syncobj = drm_syncobj_find(file, args->syncobj_out);
+ if (!syncobj) {
+ SUBMIT_ERR(context, "invalid syncobj_out '%#x'", args->syncobj_out);
+ err = -ENOENT;
+ goto unlock;
+ }
+ }
+
+ /* Allocate gather BO and copy gather words in. */
+ err = submit_copy_gather_data(&bo, drm->dev, context, args);
+ if (err)
+ goto unlock;
+
+ job_data = kzalloc(sizeof(*job_data), GFP_KERNEL);
+ if (!job_data) {
+ SUBMIT_ERR(context, "failed to allocate memory for job data");
+ err = -ENOMEM;
+ goto put_bo;
+ }
+
+ /* Get data buffer mappings and do relocation patching. */
+ err = submit_process_bufs(context, bo, args, job_data);
+ if (err)
+ goto free_job_data;
+
+ /* Allocate host1x_job and add gathers and waits to it. */
+ job = submit_create_job(context, bo, args, job_data, &fpriv->syncpoints);
+ if (IS_ERR(job)) {
+ err = PTR_ERR(job);
+ goto free_job_data;
+ }
+
+ /* Map gather data for Host1x. */
+ err = host1x_job_pin(job, context->client->base.dev);
+ if (err) {
+ SUBMIT_ERR(context, "failed to pin job: %d", err);
+ goto put_job;
+ }
+
+ if (context->client->ops->get_streamid_offset) {
+ err = context->client->ops->get_streamid_offset(
+ context->client, &job->engine_streamid_offset);
+ if (err) {
+ SUBMIT_ERR(context, "failed to get streamid offset: %d", err);
+ goto unpin_job;
+ }
+ }
+
+ if (context->memory_context && context->client->ops->can_use_memory_ctx) {
+ bool supported;
+
+ err = context->client->ops->can_use_memory_ctx(context->client, &supported);
+ if (err) {
+ SUBMIT_ERR(context, "failed to detect if engine can use memory context: %d", err);
+ goto unpin_job;
+ }
+
+ if (supported) {
+ job->memory_context = context->memory_context;
+ host1x_memory_context_get(job->memory_context);
+ }
+ } else if (context->client->ops->get_streamid_offset) {
+#ifdef CONFIG_IOMMU_API
+ struct iommu_fwspec *spec;
+
+ /*
+ * Job submission will need to temporarily change stream ID,
+ * so need to tell it what to change it back to.
+ */
+ spec = dev_iommu_fwspec_get(context->client->base.dev);
+ if (spec && spec->num_ids > 0)
+ job->engine_fallback_streamid = spec->ids[0] & 0xffff;
+ else
+ job->engine_fallback_streamid = 0x7f;
+#else
+ job->engine_fallback_streamid = 0x7f;
+#endif
+ }
+
+ /* Boot engine. */
+ err = pm_runtime_resume_and_get(context->client->base.dev);
+ if (err < 0) {
+ SUBMIT_ERR(context, "could not power up engine: %d", err);
+ goto put_memory_context;
+ }
+
+ job->user_data = job_data;
+ job->release = release_job;
+ job->timeout = 10000;
+
+ /*
+ * job_data is now part of job reference counting, so don't release
+ * it from here.
+ */
+ job_data = NULL;
+
+ /* Submit job to hardware. */
+ err = host1x_job_submit(job);
+ if (err) {
+ SUBMIT_ERR(context, "host1x job submission failed: %d", err);
+ goto unpin_job;
+ }
+
+ /* Return postfences to userspace and add fences to DMA reservations. */
+ args->syncpt.value = job->syncpt_end;
+
+ if (syncobj) {
+ struct dma_fence *fence = host1x_fence_create(job->syncpt, job->syncpt_end);
+ if (IS_ERR(fence)) {
+ err = PTR_ERR(fence);
+ SUBMIT_ERR(context, "failed to create postfence: %d", err);
+ }
+
+ drm_syncobj_replace_fence(syncobj, fence);
+ }
+
+ goto put_job;
+
+put_memory_context:
+ if (job->memory_context)
+ host1x_memory_context_put(job->memory_context);
+unpin_job:
+ host1x_job_unpin(job);
+put_job:
+ host1x_job_put(job);
+free_job_data:
+ if (job_data && job_data->used_mappings) {
+ for (i = 0; i < job_data->num_used_mappings; i++)
+ tegra_drm_mapping_put(job_data->used_mappings[i].mapping);
+
+ kfree(job_data->used_mappings);
+ }
+
+ if (job_data)
+ kfree(job_data);
+put_bo:
+ gather_bo_put(&bo->base);
+unlock:
+ if (syncobj)
+ drm_syncobj_put(syncobj);
+
+ mutex_unlock(&fpriv->lock);
+ return err;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-29 19:50:34 +0000