This will make it easier to execute commands operating on user-space
resources but generated by the kernel.
JB: Added tracking if the sw_context was called from the kernel or userspace.
Signed-off-by: Thomas Hellstrom <thellstrom@xxxxxxxxxx>
Signed-off-by: Jakob Bornecrantz <jakob@xxxxxxxxxx>
Reviewed-by: Jakob Bornecrantz <jakob@xxxxxxxxxx>
---
drivers/gpu/drm/vmwgfx/vmwgfx_drv.h | 9 ++
drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c | 136 ++++++++++++++++++-------------
2 files changed, 89 insertions(+), 56 deletions(-)
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
index 564a815..edd1e83 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
@@ -139,6 +139,7 @@ struct vmw_sw_context{
struct ida bo_list;
uint32_t last_cid;
bool cid_valid;
+ bool kernel; /**< is the called made from the kernel */
uint32_t last_sid;
uint32_t sid_translation;
bool sid_valid;
@@ -449,6 +450,14 @@ extern int vmw_dma_quiescent(struct drm_device *dev);
extern int vmw_execbuf_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
+extern int vmw_execbuf_process(struct drm_file *file_priv,
+ struct vmw_private *dev_priv,
+ void __user *user_commands,
+ void *kernel_commands,
+ uint32_t command_size,
+ uint64_t throttle_us,
+ struct drm_vmw_fence_rep __user
+ *user_fence_rep);
/**
* IRQs and wating - vmwgfx_irq.c
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
index 207f595..f342e24 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
@@ -530,9 +530,9 @@ out_err:
static int vmw_cmd_check_all(struct vmw_private *dev_priv,
struct vmw_sw_context *sw_context,
+ void *buf,
uint32_t size)
{
- void *buf = sw_context->cmd_bounce;
int32_t cur_size = size;
int ret;
@@ -723,58 +723,44 @@ int vmw_execbuf_fence_commands(struct drm_file *file_priv,
return 0;
}
-int vmw_execbuf_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
+int vmw_execbuf_process(struct drm_file *file_priv,
+ struct vmw_private *dev_priv,
+ void __user *user_commands,
+ void *kernel_commands,
+ uint32_t command_size,
+ uint64_t throttle_us,
+ struct drm_vmw_fence_rep __user *user_fence_rep)
{
- struct vmw_private *dev_priv = vmw_priv(dev);
- struct drm_vmw_execbuf_arg *arg = (struct drm_vmw_execbuf_arg *)data;
- struct drm_vmw_fence_rep fence_rep;
- struct drm_vmw_fence_rep __user *user_fence_rep;
- int ret;
- void *user_cmd;
- void *cmd;
struct vmw_sw_context *sw_context = &dev_priv->ctx;
- struct vmw_master *vmaster = vmw_master(file_priv->master);
+ struct drm_vmw_fence_rep fence_rep;
struct vmw_fence_obj *fence;
uint32_t handle;
+ void *cmd;
+ int ret;
- /*
- * This will allow us to extend the ioctl argument while
- * maintaining backwards compatibility:
- * We take different code paths depending on the value of
- * arg->version.
- */
-
- if (unlikely(arg->version != DRM_VMW_EXECBUF_VERSION)) {
- DRM_ERROR("Incorrect execbuf version.\n");
- DRM_ERROR("You're running outdated experimental "
- "vmwgfx user-space drivers.");
- return -EINVAL;
- }
-
- ret = ttm_read_lock(&vmaster->lock, true);
+ ret = mutex_lock_interruptible(&dev_priv->cmdbuf_mutex);
if (unlikely(ret != 0))
- return ret;
+ return -ERESTARTSYS;
- ret = mutex_lock_interruptible(&dev_priv->cmdbuf_mutex);
- if (unlikely(ret != 0)) {
- ret = -ERESTARTSYS;
- goto out_no_cmd_mutex;
- }
+ if (kernel_commands == NULL) {
+ sw_context->kernel = false;
- ret = vmw_resize_cmd_bounce(sw_context, arg->command_size);
- if (unlikely(ret != 0))
- goto out_unlock;
+ ret = vmw_resize_cmd_bounce(sw_context, command_size);
+ if (unlikely(ret != 0))
+ goto out_unlock;
- user_cmd = (void __user *)(unsigned long)arg->commands;
- ret = copy_from_user(sw_context->cmd_bounce,
- user_cmd, arg->command_size);
- if (unlikely(ret != 0)) {
- ret = -EFAULT;
- DRM_ERROR("Failed copying commands.\n");
- goto out_unlock;
- }
+ ret = copy_from_user(sw_context->cmd_bounce,
+ user_commands, command_size);
+
+ if (unlikely(ret != 0)) {
+ ret = -EFAULT;
+ DRM_ERROR("Failed copying commands.\n");
+ goto out_unlock;
+ }
+ kernel_commands = sw_context->cmd_bounce;
+ } else
+ sw_context->kernel = true;
sw_context->tfile = vmw_fpriv(file_priv)->tfile;
sw_context->cid_valid = false;
@@ -785,7 +771,8 @@ int vmw_execbuf_ioctl(struct drm_device *dev, void *data,
INIT_LIST_HEAD(&sw_context->validate_nodes);
- ret = vmw_cmd_check_all(dev_priv, sw_context, arg->command_size);
+ ret = vmw_cmd_check_all(dev_priv, sw_context, kernel_commands,
+ command_size);
if (unlikely(ret != 0))
goto out_err;
@@ -799,26 +786,24 @@ int vmw_execbuf_ioctl(struct drm_device *dev, void *data,
vmw_apply_relocations(sw_context);
- if (arg->throttle_us) {
+ if (throttle_us) {
ret = vmw_wait_lag(dev_priv, &dev_priv->fifo.marker_queue,
- arg->throttle_us);
+ throttle_us);
if (unlikely(ret != 0))
goto out_throttle;
}
- cmd = vmw_fifo_reserve(dev_priv, arg->command_size);
+ cmd = vmw_fifo_reserve(dev_priv, command_size);
if (unlikely(cmd == NULL)) {
DRM_ERROR("Failed reserving fifo space for commands.\n");
ret = -ENOMEM;
- goto out_err;
+ goto out_throttle;
}
- memcpy(cmd, sw_context->cmd_bounce, arg->command_size);
- vmw_fifo_commit(dev_priv, arg->command_size);
+ memcpy(cmd, kernel_commands, command_size);
+ vmw_fifo_commit(dev_priv, command_size);
- user_fence_rep = (struct drm_vmw_fence_rep __user *)
- (unsigned long)arg->fence_rep;
ret = vmw_execbuf_fence_commands(file_priv, dev_priv,
&fence,
(user_fence_rep) ? &handle : NULL);
@@ -835,7 +820,6 @@ int vmw_execbuf_ioctl(struct drm_device *dev, void *data,
(void *) fence);
vmw_clear_validations(sw_context);
- mutex_unlock(&dev_priv->cmdbuf_mutex);
if (user_fence_rep) {
fence_rep.error = ret;
@@ -872,9 +856,9 @@ int vmw_execbuf_ioctl(struct drm_device *dev, void *data,
if (likely(fence != NULL))
vmw_fence_obj_unreference(&fence);
- vmw_kms_cursor_post_execbuf(dev_priv);
- ttm_read_unlock(&vmaster->lock);
+ mutex_unlock(&dev_priv->cmdbuf_mutex);
return 0;
+
out_err:
vmw_free_relocations(sw_context);
out_throttle:
@@ -882,7 +866,47 @@ out_throttle:
vmw_clear_validations(sw_context);
out_unlock:
mutex_unlock(&dev_priv->cmdbuf_mutex);
-out_no_cmd_mutex:
+ return ret;
+}
+
+
+int vmw_execbuf_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_priv)
+{
+ struct vmw_private *dev_priv = vmw_priv(dev);
+ struct drm_vmw_execbuf_arg *arg = (struct drm_vmw_execbuf_arg *)data;
+ struct vmw_master *vmaster = vmw_master(file_priv->master);
+ int ret;
+
+ /*
+ * This will allow us to extend the ioctl argument while
+ * maintaining backwards compatibility:
+ * We take different code paths depending on the value of
+ * arg->version.
+ */
+
+ if (unlikely(arg->version != DRM_VMW_EXECBUF_VERSION)) {
+ DRM_ERROR("Incorrect execbuf version.\n");
+ DRM_ERROR("You're running outdated experimental "
+ "vmwgfx user-space drivers.");
+ return -EINVAL;
+ }
+
+ ret = ttm_read_lock(&vmaster->lock, true);
+ if (unlikely(ret != 0))
+ return ret;
+
+ ret = vmw_execbuf_process(file_priv, dev_priv,
+ (void __user *)(unsigned long)arg->commands,
+ NULL, arg->command_size, arg->throttle_us,
+ (void __user *)(unsigned long)arg->fence_rep);
+
+ if (unlikely(ret != 0))
+ goto out_unlock;
+
+ vmw_kms_cursor_post_execbuf(dev_priv);
+
+out_unlock:
ttm_read_unlock(&vmaster->lock);
return ret;
}
--
1.7.4.4
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