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drm/vmwgfx: Remove the reservation semaphore

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Now since Christian reworked TTM to always keep objects on the LRU
list unless they are pinned we shouldn't need the reservation
semaphore. It makes the driver code a lot cleaner, especially
because it was a little hard to reason when and where the
reservation semaphore needed to be held.

Signed-off-by: Zack Rusin <zackr@vmware.com>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210505035740.286923-5-zackr@vmware.com
This commit is contained in:
Zack Rusin
2021-05-04 23:57:38 -04:00
parent 88509f698c
commit 8211783f16
15 changed files with 6 additions and 535 deletions
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31
drivers/gpu/drm/vmwgfx/vmwgfx_bo.c
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@@ -96,10 +96,6 @@ int vmw_bo_pin_in_placement(struct vmw_private *dev_priv,
int ret;
uint32_t new_flags;
ret = ttm_write_lock(&dev_priv->reservation_sem, interruptible);
if (unlikely(ret != 0))
return ret;
vmw_execbuf_release_pinned_bo(dev_priv);
ret = ttm_bo_reserve(bo, interruptible, false, NULL);
@@ -116,9 +112,7 @@ int vmw_bo_pin_in_placement(struct vmw_private *dev_priv,
vmw_bo_pin_reserved(buf, true);
ttm_bo_unreserve(bo);
err:
ttm_write_unlock(&dev_priv->reservation_sem);
return ret;
}
@@ -144,10 +138,6 @@ int vmw_bo_pin_in_vram_or_gmr(struct vmw_private *dev_priv,
int ret;
uint32_t new_flags;
ret = ttm_write_lock(&dev_priv->reservation_sem, interruptible);
if (unlikely(ret != 0))
return ret;
vmw_execbuf_release_pinned_bo(dev_priv);
ret = ttm_bo_reserve(bo, interruptible, false, NULL);
@@ -172,7 +162,6 @@ out_unreserve:
ttm_bo_unreserve(bo);
err:
ttm_write_unlock(&dev_priv->reservation_sem);
return ret;
}
@@ -228,10 +217,6 @@ int vmw_bo_pin_in_start_of_vram(struct vmw_private *dev_priv,
placement.num_busy_placement = 1;
placement.busy_placement = &place;
ret = ttm_write_lock(&dev_priv->reservation_sem, interruptible);
if (unlikely(ret != 0))
return ret;
vmw_execbuf_release_pinned_bo(dev_priv);
ret = ttm_bo_reserve(bo, interruptible, false, NULL);
if (unlikely(ret != 0))
@@ -263,7 +248,6 @@ int vmw_bo_pin_in_start_of_vram(struct vmw_private *dev_priv,
ttm_bo_unreserve(bo);
err_unlock:
ttm_write_unlock(&dev_priv->reservation_sem);
return ret;
}
@@ -287,10 +271,6 @@ int vmw_bo_unpin(struct vmw_private *dev_priv,
struct ttm_buffer_object *bo = &buf->base;
int ret;
ret = ttm_read_lock(&dev_priv->reservation_sem, interruptible);
if (unlikely(ret != 0))
return ret;
ret = ttm_bo_reserve(bo, interruptible, false, NULL);
if (unlikely(ret != 0))
goto err;
@@ -300,7 +280,6 @@ int vmw_bo_unpin(struct vmw_private *dev_priv,
ttm_bo_unreserve(bo);
err:
ttm_read_unlock(&dev_priv->reservation_sem);
return ret;
}
@@ -906,10 +885,6 @@ int vmw_bo_alloc_ioctl(struct drm_device *dev, void *data,
uint32_t handle;
int ret;
ret = ttm_read_lock(&dev_priv->reservation_sem, true);
if (unlikely(ret != 0))
return ret;
ret = vmw_user_bo_alloc(dev_priv, vmw_fpriv(file_priv)->tfile,
req->size, false, &handle, &vbo,
NULL);
@@ -924,7 +899,6 @@ int vmw_bo_alloc_ioctl(struct drm_device *dev, void *data,
vmw_bo_unreference(&vbo);
out_no_bo:
ttm_read_unlock(&dev_priv->reservation_sem);
return ret;
}
@@ -1119,10 +1093,6 @@ int vmw_dumb_create(struct drm_file *file_priv,
args->pitch = args->width * ((args->bpp + 7) / 8);
args->size = args->pitch * args->height;
ret = ttm_read_lock(&dev_priv->reservation_sem, true);
if (unlikely(ret != 0))
return ret;
ret = vmw_user_bo_alloc(dev_priv, vmw_fpriv(file_priv)->tfile,
args->size, false, &args->handle,
&vbo, NULL);
@@ -1131,7 +1101,6 @@ int vmw_dumb_create(struct drm_file *file_priv,
vmw_bo_unreference(&vbo);
out_no_bo:
ttm_read_unlock(&dev_priv->reservation_sem);
return ret;
}