#include <drm/drm_prime.h>
#include <drm/drm_vblank.h>
+#include "uapi.h"
#include "drm.h"
#include "gem.h"
#define CARVEOUT_SZ SZ_64M
#define CDMA_GATHER_FETCHES_MAX_NB 16383
-struct tegra_drm_file {
- struct idr contexts;
- struct mutex lock;
-};
-
static int tegra_atomic_check(struct drm_device *drm,
struct drm_atomic_state *state)
{
if (!fpriv)
return -ENOMEM;
- idr_init_base(&fpriv->contexts, 1);
+ idr_init_base(&fpriv->legacy_contexts, 1);
+ xa_init_flags(&fpriv->contexts, XA_FLAGS_ALLOC1);
mutex_init(&fpriv->lock);
filp->driver_priv = fpriv;
if (err < 0)
return err;
- err = idr_alloc(&fpriv->contexts, context, 1, 0, GFP_KERNEL);
+ err = idr_alloc(&fpriv->legacy_contexts, context, 1, 0, GFP_KERNEL);
if (err < 0) {
client->ops->close_channel(context);
return err;
mutex_lock(&fpriv->lock);
- context = idr_find(&fpriv->contexts, args->context);
+ context = idr_find(&fpriv->legacy_contexts, args->context);
if (!context) {
err = -EINVAL;
goto unlock;
}
- idr_remove(&fpriv->contexts, context->id);
+ idr_remove(&fpriv->legacy_contexts, context->id);
tegra_drm_context_free(context);
unlock:
mutex_lock(&fpriv->lock);
- context = idr_find(&fpriv->contexts, args->context);
+ context = idr_find(&fpriv->legacy_contexts, args->context);
if (!context) {
err = -ENODEV;
goto unlock;
mutex_lock(&fpriv->lock);
- context = idr_find(&fpriv->contexts, args->context);
+ context = idr_find(&fpriv->legacy_contexts, args->context);
if (!context) {
err = -ENODEV;
goto unlock;
mutex_lock(&fpriv->lock);
- context = idr_find(&fpriv->contexts, args->context);
+ context = idr_find(&fpriv->legacy_contexts, args->context);
if (!context) {
err = -ENODEV;
goto unlock;
static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
#ifdef CONFIG_DRM_TEGRA_STAGING
- DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create,
+ DRM_IOCTL_DEF_DRV(TEGRA_CHANNEL_OPEN, tegra_drm_ioctl_channel_open,
+ DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF_DRV(TEGRA_CHANNEL_CLOSE, tegra_drm_ioctl_channel_close,
DRM_RENDER_ALLOW),
- DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap,
+ DRM_IOCTL_DEF_DRV(TEGRA_CHANNEL_MAP, tegra_drm_ioctl_channel_map,
DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF_DRV(TEGRA_CHANNEL_UNMAP, tegra_drm_ioctl_channel_unmap,
+ DRM_RENDER_ALLOW),
+
+ DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create, DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read,
DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr,
struct tegra_drm_file *fpriv = file->driver_priv;
mutex_lock(&fpriv->lock);
- idr_for_each(&fpriv->contexts, tegra_drm_context_cleanup, NULL);
+ idr_for_each(&fpriv->legacy_contexts, tegra_drm_context_cleanup, NULL);
+ tegra_drm_uapi_close_file(fpriv);
mutex_unlock(&fpriv->lock);
- idr_destroy(&fpriv->contexts);
+ idr_destroy(&fpriv->legacy_contexts);
mutex_destroy(&fpriv->lock);
kfree(fpriv);
}
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright (c) 2020 NVIDIA Corporation */
+
+#include <linux/host1x.h>
+#include <linux/iommu.h>
+#include <linux/list.h>
+
+#include <drm/drm_drv.h>
+#include <drm/drm_file.h>
+
+#include "drm.h"
+#include "uapi.h"
+
+static void tegra_drm_mapping_release(struct kref *ref)
+{
+ struct tegra_drm_mapping *mapping =
+ container_of(ref, struct tegra_drm_mapping, ref);
+
+ if (mapping->sgt)
+ dma_unmap_sgtable(mapping->dev, mapping->sgt, mapping->direction,
+ DMA_ATTR_SKIP_CPU_SYNC);
+
+ host1x_bo_unpin(mapping->dev, mapping->bo, mapping->sgt);
+ host1x_bo_put(mapping->bo);
+
+ kfree(mapping);
+}
+
+void tegra_drm_mapping_put(struct tegra_drm_mapping *mapping)
+{
+ kref_put(&mapping->ref, tegra_drm_mapping_release);
+}
+
+static void tegra_drm_channel_context_close(struct tegra_drm_context *context)
+{
+ struct tegra_drm_mapping *mapping;
+ unsigned long id;
+
+ xa_for_each(&context->mappings, id, mapping)
+ tegra_drm_mapping_put(mapping);
+
+ xa_destroy(&context->mappings);
+
+ host1x_channel_put(context->channel);
+
+ kfree(context);
+}
+
+void tegra_drm_uapi_close_file(struct tegra_drm_file *file)
+{
+ struct tegra_drm_context *context;
+ unsigned long id;
+
+ xa_for_each(&file->contexts, id, context)
+ tegra_drm_channel_context_close(context);
+
+ xa_destroy(&file->contexts);
+}
+
+static struct tegra_drm_client *tegra_drm_find_client(struct tegra_drm *tegra, u32 class)
+{
+ struct tegra_drm_client *client;
+
+ list_for_each_entry(client, &tegra->clients, list)
+ if (client->base.class == class)
+ return client;
+
+ return NULL;
+}
+
+int tegra_drm_ioctl_channel_open(struct drm_device *drm, void *data, struct drm_file *file)
+{
+ struct tegra_drm_file *fpriv = file->driver_priv;
+ struct tegra_drm *tegra = drm->dev_private;
+ struct drm_tegra_channel_open *args = data;
+ struct tegra_drm_client *client = NULL;
+ struct tegra_drm_context *context;
+ int err;
+
+ if (args->flags)
+ return -EINVAL;
+
+ context = kzalloc(sizeof(*context), GFP_KERNEL);
+ if (!context)
+ return -ENOMEM;
+
+ client = tegra_drm_find_client(tegra, args->host1x_class);
+ if (!client) {
+ err = -ENODEV;
+ goto free;
+ }
+
+ if (client->shared_channel) {
+ context->channel = host1x_channel_get(client->shared_channel);
+ } else {
+ context->channel = host1x_channel_request(&client->base);
+ if (!context->channel) {
+ err = -EBUSY;
+ goto free;
+ }
+ }
+
+ err = xa_alloc(&fpriv->contexts, &args->context, context, XA_LIMIT(1, U32_MAX),
+ GFP_KERNEL);
+ if (err < 0)
+ goto put_channel;
+
+ context->client = client;
+ xa_init_flags(&context->mappings, XA_FLAGS_ALLOC1);
+
+ args->version = client->version;
+ args->capabilities = 0;
+
+ if (device_get_dma_attr(client->base.dev) == DEV_DMA_COHERENT)
+ args->capabilities |= DRM_TEGRA_CHANNEL_CAP_CACHE_COHERENT;
+
+ return 0;
+
+put_channel:
+ host1x_channel_put(context->channel);
+free:
+ kfree(context);
+
+ return err;
+}
+
+int tegra_drm_ioctl_channel_close(struct drm_device *drm, void *data, struct drm_file *file)
+{
+ struct tegra_drm_file *fpriv = file->driver_priv;
+ struct drm_tegra_channel_close *args = data;
+ struct tegra_drm_context *context;
+
+ mutex_lock(&fpriv->lock);
+
+ context = xa_load(&fpriv->contexts, args->context);
+ if (!context) {
+ mutex_unlock(&fpriv->lock);
+ return -EINVAL;
+ }
+
+ xa_erase(&fpriv->contexts, args->context);
+
+ mutex_unlock(&fpriv->lock);
+
+ tegra_drm_channel_context_close(context);
+
+ return 0;
+}
+
+int tegra_drm_ioctl_channel_map(struct drm_device *drm, void *data, struct drm_file *file)
+{
+ struct tegra_drm_file *fpriv = file->driver_priv;
+ struct drm_tegra_channel_map *args = data;
+ struct tegra_drm_mapping *mapping;
+ struct tegra_drm_context *context;
+ int err = 0;
+
+ if (args->flags & ~DRM_TEGRA_CHANNEL_MAP_READ_WRITE)
+ return -EINVAL;
+
+ mutex_lock(&fpriv->lock);
+
+ context = xa_load(&fpriv->contexts, args->context);
+ if (!context) {
+ mutex_unlock(&fpriv->lock);
+ return -EINVAL;
+ }
+
+ mapping = kzalloc(sizeof(*mapping), GFP_KERNEL);
+ if (!mapping) {
+ err = -ENOMEM;
+ goto unlock;
+ }
+
+ kref_init(&mapping->ref);
+
+ mapping->dev = context->client->base.dev;
+ mapping->bo = tegra_gem_lookup(file, args->handle);
+ if (!mapping->bo) {
+ err = -EINVAL;
+ goto unlock;
+ }
+
+ if (context->client->base.group) {
+ /* IOMMU domain managed directly using IOMMU API */
+ host1x_bo_pin(mapping->dev, mapping->bo, &mapping->iova);
+ } else {
+ switch (args->flags & DRM_TEGRA_CHANNEL_MAP_READ_WRITE) {
+ case DRM_TEGRA_CHANNEL_MAP_READ_WRITE:
+ mapping->direction = DMA_BIDIRECTIONAL;
+ break;
+
+ case DRM_TEGRA_CHANNEL_MAP_WRITE:
+ mapping->direction = DMA_FROM_DEVICE;
+ break;
+
+ case DRM_TEGRA_CHANNEL_MAP_READ:
+ mapping->direction = DMA_TO_DEVICE;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ mapping->sgt = host1x_bo_pin(mapping->dev, mapping->bo, NULL);
+ if (IS_ERR(mapping->sgt)) {
+ err = PTR_ERR(mapping->sgt);
+ goto put_gem;
+ }
+
+ err = dma_map_sgtable(mapping->dev, mapping->sgt, mapping->direction,
+ DMA_ATTR_SKIP_CPU_SYNC);
+ if (err)
+ goto unpin;
+
+ mapping->iova = sg_dma_address(mapping->sgt->sgl);
+ }
+
+ mapping->iova_end = mapping->iova + host1x_to_tegra_bo(mapping->bo)->size;
+
+ err = xa_alloc(&context->mappings, &args->mapping, mapping, XA_LIMIT(1, U32_MAX),
+ GFP_KERNEL);
+ if (err < 0)
+ goto unmap;
+
+ mutex_unlock(&fpriv->lock);
+
+ return 0;
+
+unmap:
+ if (mapping->sgt) {
+ dma_unmap_sgtable(mapping->dev, mapping->sgt, mapping->direction,
+ DMA_ATTR_SKIP_CPU_SYNC);
+ }
+unpin:
+ host1x_bo_unpin(mapping->dev, mapping->bo, mapping->sgt);
+put_gem:
+ host1x_bo_put(mapping->bo);
+ kfree(mapping);
+unlock:
+ mutex_unlock(&fpriv->lock);
+ return err;
+}
+
+int tegra_drm_ioctl_channel_unmap(struct drm_device *drm, void *data, struct drm_file *file)
+{
+ struct tegra_drm_file *fpriv = file->driver_priv;
+ struct drm_tegra_channel_unmap *args = data;
+ struct tegra_drm_mapping *mapping;
+ struct tegra_drm_context *context;
+
+ mutex_lock(&fpriv->lock);
+
+ context = xa_load(&fpriv->contexts, args->context);
+ if (!context) {
+ mutex_unlock(&fpriv->lock);
+ return -EINVAL;
+ }
+
+ mapping = xa_erase(&context->mappings, args->mapping);
+
+ mutex_unlock(&fpriv->lock);
+
+ if (!mapping)
+ return -EINVAL;
+
+ tegra_drm_mapping_put(mapping);
+ return 0;
+}
+
+int tegra_drm_ioctl_gem_create(struct drm_device *drm, void *data,
+ struct drm_file *file)
+{
+ struct drm_tegra_gem_create *args = data;
+ struct tegra_bo *bo;
+
+ if (args->flags)
+ return -EINVAL;
+
+ bo = tegra_bo_create_with_handle(file, drm, args->size, args->flags,
+ &args->handle);
+ if (IS_ERR(bo))
+ return PTR_ERR(bo);
+
+ return 0;
+}
+
+int tegra_drm_ioctl_gem_mmap(struct drm_device *drm, void *data,
+ struct drm_file *file)
+{
+ struct drm_tegra_gem_mmap *args = data;
+ struct drm_gem_object *gem;
+ struct tegra_bo *bo;
+
+ gem = drm_gem_object_lookup(file, args->handle);
+ if (!gem)
+ return -EINVAL;
+
+ bo = to_tegra_bo(gem);
+
+ args->offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
+
+ drm_gem_object_put(gem);
+
+ return 0;
+}
projects / users / hch / dma-mapping.git / commitdiff