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authorDave Airlie <airlied@redhat.com>2021-04-18 09:26:54 +1000
committerDave Airlie <airlied@redhat.com>2021-04-18 09:27:00 +1000
commit796b556cbfdbe0d65b9793e63653ad24f9fa033c (patch)
treecfdc57e0d8343f65a59d31eef1ceb0544beda18e
parent4d2e1288372ccc5ac60290bc10cace49c9bfa6d0 (diff)
parent2ef4fb92363c44e8a6f93fd0877b6a7dee6f874d (diff)
Merge tag 'vmwgfx-fixes-2021-04-14' of gitlab.freedesktop.org:zack/vmwgfx into drm-fixes
vmwgfx fixes for regressions in 5.12 Here's a set of 3 patches fixing ugly regressions in the vmwgfx driver. We broke lock initialization code and ended up using spinlocks before initialization breaking lockdep. Also there was a bit of a fallout from drm changes which made the core validate that unreferenced buffers have been unpinned. vmwgfx pinning code predates a lot of the core drm and wasn't written to account for those semantics. Fortunately changes required to fix it are not too intrusive. The changes have been validated by our internal ci. Signed-off-by: Zack Rusin <zackr@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com> From: Zack Rusin <zackr@vmware.com> Link: https://patchwork.freedesktop.org/patch/msgid/f7add0a2-162e-3bd2-b1be-344a94f2acbf@vmware.com
-rw-r--r--drivers/gpu/drm/vmwgfx/vmwgfx_cotable.c4
-rw-r--r--drivers/gpu/drm/vmwgfx/vmwgfx_drv.c17
-rw-r--r--drivers/gpu/drm/vmwgfx/vmwgfx_drv.h5
-rw-r--r--drivers/gpu/drm/vmwgfx/vmwgfx_mob.c14
4 files changed, 27 insertions, 13 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_cotable.c b/drivers/gpu/drm/vmwgfx/vmwgfx_cotable.c
index ba658fa9cf6c..183571c387b7 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_cotable.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_cotable.c
@@ -481,11 +481,15 @@ static int vmw_cotable_resize(struct vmw_resource *res, size_t new_size)
vmw_bo_unreference(&old_buf);
res->id = vcotbl->type;
+ /* Release the pin acquired in vmw_bo_init */
+ ttm_bo_unpin(bo);
+
return 0;
out_map_new:
ttm_bo_kunmap(&old_map);
out_wait:
+ ttm_bo_unpin(bo);
ttm_bo_unreserve(bo);
vmw_bo_unreference(&buf);
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index dd69b51c40e4..6fa24645fbbf 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -712,17 +712,8 @@ static int vmw_driver_load(struct vmw_private *dev_priv, u32 pci_id)
dev_priv->last_read_seqno = (uint32_t) -100;
dev_priv->drm.dev_private = dev_priv;
- ret = vmw_setup_pci_resources(dev_priv, pci_id);
- if (ret)
- return ret;
- ret = vmw_detect_version(dev_priv);
- if (ret)
- goto out_no_pci_or_version;
-
mutex_init(&dev_priv->cmdbuf_mutex);
- mutex_init(&dev_priv->release_mutex);
mutex_init(&dev_priv->binding_mutex);
- mutex_init(&dev_priv->global_kms_state_mutex);
ttm_lock_init(&dev_priv->reservation_sem);
spin_lock_init(&dev_priv->resource_lock);
spin_lock_init(&dev_priv->hw_lock);
@@ -730,6 +721,14 @@ static int vmw_driver_load(struct vmw_private *dev_priv, u32 pci_id)
spin_lock_init(&dev_priv->cap_lock);
spin_lock_init(&dev_priv->cursor_lock);
+ ret = vmw_setup_pci_resources(dev_priv, pci_id);
+ if (ret)
+ return ret;
+ ret = vmw_detect_version(dev_priv);
+ if (ret)
+ goto out_no_pci_or_version;
+
+
for (i = vmw_res_context; i < vmw_res_max; ++i) {
idr_init(&dev_priv->res_idr[i]);
INIT_LIST_HEAD(&dev_priv->res_lru[i]);
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
index 5fa5bcd20cc5..eb76a6b9ebca 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
@@ -529,7 +529,6 @@ struct vmw_private {
struct vmw_overlay *overlay_priv;
struct drm_property *hotplug_mode_update_property;
struct drm_property *implicit_placement_property;
- struct mutex global_kms_state_mutex;
spinlock_t cursor_lock;
struct drm_atomic_state *suspend_state;
@@ -592,7 +591,6 @@ struct vmw_private {
bool refuse_hibernation;
bool suspend_locked;
- struct mutex release_mutex;
atomic_t num_fifo_resources;
/*
@@ -1524,9 +1522,8 @@ static inline void vmw_bo_unreference(struct vmw_buffer_object **buf)
struct vmw_buffer_object *tmp_buf = *buf;
*buf = NULL;
- if (tmp_buf != NULL) {
+ if (tmp_buf != NULL)
ttm_bo_put(&tmp_buf->base);
- }
}
static inline struct vmw_buffer_object *
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_mob.c b/drivers/gpu/drm/vmwgfx/vmwgfx_mob.c
index a372980fe6a5..f2d625415458 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_mob.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_mob.c
@@ -94,6 +94,16 @@ static void vmw_mob_pt_setup(struct vmw_mob *mob,
struct vmw_piter data_iter,
unsigned long num_data_pages);
+
+static inline void vmw_bo_unpin_unlocked(struct ttm_buffer_object *bo)
+{
+ int ret = ttm_bo_reserve(bo, false, true, NULL);
+ BUG_ON(ret != 0);
+ ttm_bo_unpin(bo);
+ ttm_bo_unreserve(bo);
+}
+
+
/*
* vmw_setup_otable_base - Issue an object table base setup command to
* the device
@@ -277,6 +287,7 @@ out_no_setup:
&batch->otables[i]);
}
+ vmw_bo_unpin_unlocked(batch->otable_bo);
ttm_bo_put(batch->otable_bo);
batch->otable_bo = NULL;
return ret;
@@ -340,6 +351,7 @@ static void vmw_otable_batch_takedown(struct vmw_private *dev_priv,
BUG_ON(ret != 0);
vmw_bo_fence_single(bo, NULL);
+ ttm_bo_unpin(bo);
ttm_bo_unreserve(bo);
ttm_bo_put(batch->otable_bo);
@@ -528,6 +540,7 @@ static void vmw_mob_pt_setup(struct vmw_mob *mob,
void vmw_mob_destroy(struct vmw_mob *mob)
{
if (mob->pt_bo) {
+ vmw_bo_unpin_unlocked(mob->pt_bo);
ttm_bo_put(mob->pt_bo);
mob->pt_bo = NULL;
}
@@ -643,6 +656,7 @@ int vmw_mob_bind(struct vmw_private *dev_priv,
out_no_cmd_space:
vmw_fifo_resource_dec(dev_priv);
if (pt_set_up) {
+ vmw_bo_unpin_unlocked(mob->pt_bo);
ttm_bo_put(mob->pt_bo);
mob->pt_bo = NULL;
}