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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/gpu/drm/tegra/uapi.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/tegra/uapi.c')
-rw-r--r--drivers/gpu/drm/tegra/uapi.c359
1 files changed, 359 insertions, 0 deletions
diff --git a/drivers/gpu/drm/tegra/uapi.c b/drivers/gpu/drm/tegra/uapi.c
new file mode 100644
index 000000000..a98239cb0
--- /dev/null
+++ b/drivers/gpu/drm/tegra/uapi.c
@@ -0,0 +1,359 @@
+// 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/drm_utils.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);
+
+ host1x_bo_unpin(mapping->map);
+ 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;
+
+ if (context->memory_context)
+ host1x_memory_context_put(context->memory_context);
+
+ 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;
+ struct host1x_syncpt *sp;
+ unsigned long id;
+
+ xa_for_each(&file->contexts, id, context)
+ tegra_drm_channel_context_close(context);
+
+ xa_for_each(&file->syncpoints, id, sp)
+ host1x_syncpt_put(sp);
+
+ xa_destroy(&file->contexts);
+ xa_destroy(&file->syncpoints);
+}
+
+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 host1x *host = tegra_drm_to_host1x(drm->dev_private);
+ 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;
+ }
+ }
+
+ /* Only allocate context if the engine supports context isolation. */
+ if (device_iommu_mapped(client->base.dev) && client->ops->can_use_memory_ctx) {
+ bool supported;
+
+ err = client->ops->can_use_memory_ctx(client, &supported);
+ if (err)
+ goto put_channel;
+
+ if (supported)
+ context->memory_context = host1x_memory_context_alloc(
+ host, get_task_pid(current, PIDTYPE_TGID));
+
+ if (IS_ERR(context->memory_context)) {
+ if (PTR_ERR(context->memory_context) != -EOPNOTSUPP) {
+ err = PTR_ERR(context->memory_context);
+ goto put_channel;
+ } else {
+ /*
+ * OK, HW does not support contexts or contexts
+ * are disabled.
+ */
+ context->memory_context = NULL;
+ }
+ }
+ }
+
+ err = xa_alloc(&fpriv->contexts, &args->context, context, XA_LIMIT(1, U32_MAX),
+ GFP_KERNEL);
+ if (err < 0)
+ goto put_memctx;
+
+ 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_memctx:
+ if (context->memory_context)
+ host1x_memory_context_put(context->memory_context);
+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;
+ enum dma_data_direction direction;
+ struct device *mapping_dev;
+ 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);
+
+ if (context->memory_context)
+ mapping_dev = &context->memory_context->dev;
+ else
+ mapping_dev = context->client->base.dev;
+
+ mapping->bo = tegra_gem_lookup(file, args->handle);
+ if (!mapping->bo) {
+ err = -EINVAL;
+ goto free;
+ }
+
+ switch (args->flags & DRM_TEGRA_CHANNEL_MAP_READ_WRITE) {
+ case DRM_TEGRA_CHANNEL_MAP_READ_WRITE:
+ direction = DMA_BIDIRECTIONAL;
+ break;
+
+ case DRM_TEGRA_CHANNEL_MAP_WRITE:
+ direction = DMA_FROM_DEVICE;
+ break;
+
+ case DRM_TEGRA_CHANNEL_MAP_READ:
+ direction = DMA_TO_DEVICE;
+ break;
+
+ default:
+ err = -EINVAL;
+ goto put_gem;
+ }
+
+ mapping->map = host1x_bo_pin(mapping_dev, mapping->bo, direction, NULL);
+ if (IS_ERR(mapping->map)) {
+ err = PTR_ERR(mapping->map);
+ goto put_gem;
+ }
+
+ mapping->iova = mapping->map->phys;
+ mapping->iova_end = mapping->iova + host1x_to_tegra_bo(mapping->bo)->gem.size;
+
+ err = xa_alloc(&context->mappings, &args->mapping, mapping, XA_LIMIT(1, U32_MAX),
+ GFP_KERNEL);
+ if (err < 0)
+ goto unpin;
+
+ mutex_unlock(&fpriv->lock);
+
+ return 0;
+
+unpin:
+ host1x_bo_unpin(mapping->map);
+put_gem:
+ host1x_bo_put(mapping->bo);
+free:
+ 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_syncpoint_allocate(struct drm_device *drm, void *data, struct drm_file *file)
+{
+ struct host1x *host1x = tegra_drm_to_host1x(drm->dev_private);
+ struct tegra_drm_file *fpriv = file->driver_priv;
+ struct drm_tegra_syncpoint_allocate *args = data;
+ struct host1x_syncpt *sp;
+ int err;
+
+ if (args->id)
+ return -EINVAL;
+
+ sp = host1x_syncpt_alloc(host1x, HOST1X_SYNCPT_CLIENT_MANAGED, current->comm);
+ if (!sp)
+ return -EBUSY;
+
+ args->id = host1x_syncpt_id(sp);
+
+ err = xa_insert(&fpriv->syncpoints, args->id, sp, GFP_KERNEL);
+ if (err) {
+ host1x_syncpt_put(sp);
+ return err;
+ }
+
+ return 0;
+}
+
+int tegra_drm_ioctl_syncpoint_free(struct drm_device *drm, void *data, struct drm_file *file)
+{
+ struct tegra_drm_file *fpriv = file->driver_priv;
+ struct drm_tegra_syncpoint_allocate *args = data;
+ struct host1x_syncpt *sp;
+
+ mutex_lock(&fpriv->lock);
+ sp = xa_erase(&fpriv->syncpoints, args->id);
+ mutex_unlock(&fpriv->lock);
+
+ if (!sp)
+ return -EINVAL;
+
+ host1x_syncpt_put(sp);
+
+ return 0;
+}
+
+int tegra_drm_ioctl_syncpoint_wait(struct drm_device *drm, void *data, struct drm_file *file)
+{
+ struct host1x *host1x = tegra_drm_to_host1x(drm->dev_private);
+ struct drm_tegra_syncpoint_wait *args = data;
+ signed long timeout_jiffies;
+ struct host1x_syncpt *sp;
+
+ if (args->padding != 0)
+ return -EINVAL;
+
+ sp = host1x_syncpt_get_by_id_noref(host1x, args->id);
+ if (!sp)
+ return -EINVAL;
+
+ timeout_jiffies = drm_timeout_abs_to_jiffies(args->timeout_ns);
+
+ return host1x_syncpt_wait(sp, args->threshold, timeout_jiffies, &args->value);
+}