[PATCH v2 01/11] drm/qxl: properly handle device init failures

[PATCH v2 01/11] drm/qxl: properly handle device init failures

[Gerd Hoffmann]

Specifically do not try release resources which where
not allocated in the first place.

Cc: Tong Zhang <ztong0001@gmail.com>
Tested-by: Tong Zhang <ztong0001@gmail.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/qxl/qxl_display.c | 3 +++
 drivers/gpu/drm/qxl/qxl_kms.c     | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c
index c326412136c5..ec50d2cfd4e1 100644
--- a/drivers/gpu/drm/qxl/qxl_display.c
+++ b/drivers/gpu/drm/qxl/qxl_display.c
@@ -1183,6 +1183,9 @@ int qxl_destroy_monitors_object(struct qxl_device *qdev)
 {
 	int ret;
 
+	if (!qdev->monitors_config_bo)
+		return 0;
+
 	qdev->monitors_config = NULL;
 	qdev->ram_header->monitors_config = 0;
 
diff --git a/drivers/gpu/drm/qxl/qxl_kms.c b/drivers/gpu/drm/qxl/qxl_kms.c
index 66d74aaaee06..4dc5ad13f12c 100644
--- a/drivers/gpu/drm/qxl/qxl_kms.c
+++ b/drivers/gpu/drm/qxl/qxl_kms.c
@@ -288,6 +288,10 @@ void qxl_device_fini(struct qxl_device *qdev)
 {
 	int cur_idx;
 
+	/* check if qxl_device_init() was successful (gc_work is initialized last) */
+	if (!qdev->gc_work.func)
+		return;
+
 	for (cur_idx = 0; cur_idx < 3; cur_idx++) {
 		if (!qdev->current_release_bo[cur_idx])
 			continue;
-- 
2.29.2

[PATCH v2 02/11] drm/qxl: more fence wait rework

[Gerd Hoffmann]

Move qxl_io_notify_oom() call into wait condition.
That way the driver will call it again if one call
wasn't enough.

Also allows to remove the extra dma_fence_is_signaled()
check and the goto.

Fixes: 5a838e5d5825 ("drm/qxl: simplify qxl_fence_wait")
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 drivers/gpu/drm/qxl/qxl_release.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/qxl/qxl_release.c b/drivers/gpu/drm/qxl/qxl_release.c
index 6ed673d75f9f..579c6de10c8e 100644
--- a/drivers/gpu/drm/qxl/qxl_release.c
+++ b/drivers/gpu/drm/qxl/qxl_release.c
@@ -62,16 +62,12 @@ static long qxl_fence_wait(struct dma_fence *fence, bool intr,
 
 	qdev = container_of(fence->lock, struct qxl_device, release_lock);
 
-	if (dma_fence_is_signaled(fence))
-		goto signaled;
-
-	qxl_io_notify_oom(qdev);
 	if (!wait_event_timeout(qdev->release_event,
-				dma_fence_is_signaled(fence),
+				(dma_fence_is_signaled(fence) ||
+				 (qxl_io_notify_oom(qdev), 0)),
 				timeout))
 		return 0;
 
-signaled:
 	cur = jiffies;
 	if (time_after(cur, end))
 		return 0;
-- 
2.29.2

Re: [PATCH v2 02/11] drm/qxl: more fence wait rework

[Thomas Zimmermann]

[-- Attachment #1.1: Type: text/plain, Size: 1529 bytes --]



Am 17.02.21 um 13:32 schrieb Gerd Hoffmann:
> Move qxl_io_notify_oom() call into wait condition.
> That way the driver will call it again if one call
> wasn't enough.
> 
> Also allows to remove the extra dma_fence_is_signaled()
> check and the goto.
> 
> Fixes: 5a838e5d5825 ("drm/qxl: simplify qxl_fence_wait")
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

Acked-by: Thomas Zimmermann <tzimmermann@suse.de>

> ---
>   drivers/gpu/drm/qxl/qxl_release.c | 8 ++------
>   1 file changed, 2 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/qxl/qxl_release.c b/drivers/gpu/drm/qxl/qxl_release.c
> index 6ed673d75f9f..579c6de10c8e 100644
> --- a/drivers/gpu/drm/qxl/qxl_release.c
> +++ b/drivers/gpu/drm/qxl/qxl_release.c
> @@ -62,16 +62,12 @@ static long qxl_fence_wait(struct dma_fence *fence, bool intr,
>   
>   	qdev = container_of(fence->lock, struct qxl_device, release_lock);
>   
> -	if (dma_fence_is_signaled(fence))
> -		goto signaled;
> -
> -	qxl_io_notify_oom(qdev);
>   	if (!wait_event_timeout(qdev->release_event,
> -				dma_fence_is_signaled(fence),
> +				(dma_fence_is_signaled(fence) ||
> +				 (qxl_io_notify_oom(qdev), 0)),
>   				timeout))
>   		return 0;
>   
> -signaled:
>   	cur = jiffies;
>   	if (time_after(cur, end))
>   		return 0;
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer


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[PATCH v2 03/11] drm/qxl: use ttm bo priorities

[Gerd Hoffmann]

Allow to set priorities for buffer objects.  Use priority 1 for surface
and cursor command releases.  Use priority 0 for drawing command
releases.  That way the short-living drawing commands are first in line
when it comes to eviction, making it *much* less likely that
ttm_bo_mem_force_space() picks something which can't be evicted and
throws an error after waiting a while without success.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 drivers/gpu/drm/qxl/qxl_object.h  |  1 +
 drivers/gpu/drm/qxl/qxl_cmd.c     |  2 +-
 drivers/gpu/drm/qxl/qxl_display.c |  4 ++--
 drivers/gpu/drm/qxl/qxl_gem.c     |  2 +-
 drivers/gpu/drm/qxl/qxl_object.c  |  5 +++--
 drivers/gpu/drm/qxl/qxl_release.c | 18 ++++++++++++------
 6 files changed, 20 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/qxl/qxl_object.h b/drivers/gpu/drm/qxl/qxl_object.h
index e60a8f88e226..dc1659e717f1 100644
--- a/drivers/gpu/drm/qxl/qxl_object.h
+++ b/drivers/gpu/drm/qxl/qxl_object.h
@@ -61,6 +61,7 @@ static inline u64 qxl_bo_mmap_offset(struct qxl_bo *bo)
 extern int qxl_bo_create(struct qxl_device *qdev,
 			 unsigned long size,
 			 bool kernel, bool pinned, u32 domain,
+			 u32 priority,
 			 struct qxl_surface *surf,
 			 struct qxl_bo **bo_ptr);
 extern int qxl_bo_kmap(struct qxl_bo *bo, struct dma_buf_map *map);
diff --git a/drivers/gpu/drm/qxl/qxl_cmd.c b/drivers/gpu/drm/qxl/qxl_cmd.c
index 7e22a81bfb36..7b00c955cd82 100644
--- a/drivers/gpu/drm/qxl/qxl_cmd.c
+++ b/drivers/gpu/drm/qxl/qxl_cmd.c
@@ -269,7 +269,7 @@ int qxl_alloc_bo_reserved(struct qxl_device *qdev,
 	int ret;
 
 	ret = qxl_bo_create(qdev, size, false /* not kernel - device */,
-			    false, QXL_GEM_DOMAIN_VRAM, NULL, &bo);
+			    false, QXL_GEM_DOMAIN_VRAM, 0, NULL, &bo);
 	if (ret) {
 		DRM_ERROR("failed to allocate VRAM BO\n");
 		return ret;
diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c
index ec50d2cfd4e1..a1b5cc5918bc 100644
--- a/drivers/gpu/drm/qxl/qxl_display.c
+++ b/drivers/gpu/drm/qxl/qxl_display.c
@@ -799,8 +799,8 @@ static int qxl_plane_prepare_fb(struct drm_plane *plane,
 				qdev->dumb_shadow_bo = NULL;
 			}
 			qxl_bo_create(qdev, surf.height * surf.stride,
-				      true, true, QXL_GEM_DOMAIN_SURFACE, &surf,
-				      &qdev->dumb_shadow_bo);
+				      true, true, QXL_GEM_DOMAIN_SURFACE, 0,
+				      &surf, &qdev->dumb_shadow_bo);
 		}
 		if (user_bo->shadow != qdev->dumb_shadow_bo) {
 			if (user_bo->shadow) {
diff --git a/drivers/gpu/drm/qxl/qxl_gem.c b/drivers/gpu/drm/qxl/qxl_gem.c
index 48e096285b4c..a08da0bd9098 100644
--- a/drivers/gpu/drm/qxl/qxl_gem.c
+++ b/drivers/gpu/drm/qxl/qxl_gem.c
@@ -55,7 +55,7 @@ int qxl_gem_object_create(struct qxl_device *qdev, int size,
 	/* At least align on page size */
 	if (alignment < PAGE_SIZE)
 		alignment = PAGE_SIZE;
-	r = qxl_bo_create(qdev, size, kernel, false, initial_domain, surf, &qbo);
+	r = qxl_bo_create(qdev, size, kernel, false, initial_domain, 0, surf, &qbo);
 	if (r) {
 		if (r != -ERESTARTSYS)
 			DRM_ERROR(
diff --git a/drivers/gpu/drm/qxl/qxl_object.c b/drivers/gpu/drm/qxl/qxl_object.c
index 705b51535492..7eada4ad217b 100644
--- a/drivers/gpu/drm/qxl/qxl_object.c
+++ b/drivers/gpu/drm/qxl/qxl_object.c
@@ -103,8 +103,8 @@ static const struct drm_gem_object_funcs qxl_object_funcs = {
 	.print_info = drm_gem_ttm_print_info,
 };
 
-int qxl_bo_create(struct qxl_device *qdev,
-		  unsigned long size, bool kernel, bool pinned, u32 domain,
+int qxl_bo_create(struct qxl_device *qdev, unsigned long size,
+		  bool kernel, bool pinned, u32 domain, u32 priority,
 		  struct qxl_surface *surf,
 		  struct qxl_bo **bo_ptr)
 {
@@ -137,6 +137,7 @@ int qxl_bo_create(struct qxl_device *qdev,
 
 	qxl_ttm_placement_from_domain(bo, domain);
 
+	bo->tbo.priority = priority;
 	r = ttm_bo_init_reserved(&qdev->mman.bdev, &bo->tbo, size, type,
 				 &bo->placement, 0, &ctx, NULL, NULL,
 				 &qxl_ttm_bo_destroy);
diff --git a/drivers/gpu/drm/qxl/qxl_release.c b/drivers/gpu/drm/qxl/qxl_release.c
index 579c6de10c8e..716d706ca7f0 100644
--- a/drivers/gpu/drm/qxl/qxl_release.c
+++ b/drivers/gpu/drm/qxl/qxl_release.c
@@ -160,11 +160,12 @@ qxl_release_free(struct qxl_device *qdev,
 }
 
 static int qxl_release_bo_alloc(struct qxl_device *qdev,
-				struct qxl_bo **bo)
+				struct qxl_bo **bo,
+				u32 priority)
 {
 	/* pin releases bo's they are too messy to evict */
 	return qxl_bo_create(qdev, PAGE_SIZE, false, true,
-			     QXL_GEM_DOMAIN_VRAM, NULL, bo);
+			     QXL_GEM_DOMAIN_VRAM, priority, NULL, bo);
 }
 
 int qxl_release_list_add(struct qxl_release *release, struct qxl_bo *bo)
@@ -287,13 +288,18 @@ int qxl_alloc_release_reserved(struct qxl_device *qdev, unsigned long size,
 	int ret = 0;
 	union qxl_release_info *info;
 	int cur_idx;
+	u32 priority;
 
-	if (type == QXL_RELEASE_DRAWABLE)
+	if (type == QXL_RELEASE_DRAWABLE) {
 		cur_idx = 0;
-	else if (type == QXL_RELEASE_SURFACE_CMD)
+		priority = 0;
+	} else if (type == QXL_RELEASE_SURFACE_CMD) {
 		cur_idx = 1;
-	else if (type == QXL_RELEASE_CURSOR_CMD)
+		priority = 1;
+	} else if (type == QXL_RELEASE_CURSOR_CMD) {
 		cur_idx = 2;
+		priority = 1;
+	}
 	else {
 		DRM_ERROR("got illegal type: %d\n", type);
 		return -EINVAL;
@@ -315,7 +321,7 @@ int qxl_alloc_release_reserved(struct qxl_device *qdev, unsigned long size,
 		qdev->current_release_bo[cur_idx] = NULL;
 	}
 	if (!qdev->current_release_bo[cur_idx]) {
-		ret = qxl_release_bo_alloc(qdev, &qdev->current_release_bo[cur_idx]);
+		ret = qxl_release_bo_alloc(qdev, &qdev->current_release_bo[cur_idx], priority);
 		if (ret) {
 			mutex_unlock(&qdev->release_mutex);
 			qxl_release_free(qdev, *release);
-- 
2.29.2

Re: [PATCH v2 03/11] drm/qxl: use ttm bo priorities

[Thomas Zimmermann]

[-- Attachment #1.1: Type: text/plain, Size: 6460 bytes --]



Am 17.02.21 um 13:32 schrieb Gerd Hoffmann:
> Allow to set priorities for buffer objects.  Use priority 1 for surface
> and cursor command releases.  Use priority 0 for drawing command
> releases.  That way the short-living drawing commands are first in line
> when it comes to eviction, making it *much* less likely that
> ttm_bo_mem_force_space() picks something which can't be evicted and
> throws an error after waiting a while without success.
> 
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

Acked-by: Thomas Zimmermann <tzimmermann@suse.de>

> ---
>   drivers/gpu/drm/qxl/qxl_object.h  |  1 +
>   drivers/gpu/drm/qxl/qxl_cmd.c     |  2 +-
>   drivers/gpu/drm/qxl/qxl_display.c |  4 ++--
>   drivers/gpu/drm/qxl/qxl_gem.c     |  2 +-
>   drivers/gpu/drm/qxl/qxl_object.c  |  5 +++--
>   drivers/gpu/drm/qxl/qxl_release.c | 18 ++++++++++++------
>   6 files changed, 20 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/gpu/drm/qxl/qxl_object.h b/drivers/gpu/drm/qxl/qxl_object.h
> index e60a8f88e226..dc1659e717f1 100644
> --- a/drivers/gpu/drm/qxl/qxl_object.h
> +++ b/drivers/gpu/drm/qxl/qxl_object.h
> @@ -61,6 +61,7 @@ static inline u64 qxl_bo_mmap_offset(struct qxl_bo *bo)
>   extern int qxl_bo_create(struct qxl_device *qdev,
>   			 unsigned long size,
>   			 bool kernel, bool pinned, u32 domain,
> +			 u32 priority,
>   			 struct qxl_surface *surf,
>   			 struct qxl_bo **bo_ptr);
>   extern int qxl_bo_kmap(struct qxl_bo *bo, struct dma_buf_map *map);
> diff --git a/drivers/gpu/drm/qxl/qxl_cmd.c b/drivers/gpu/drm/qxl/qxl_cmd.c
> index 7e22a81bfb36..7b00c955cd82 100644
> --- a/drivers/gpu/drm/qxl/qxl_cmd.c
> +++ b/drivers/gpu/drm/qxl/qxl_cmd.c
> @@ -269,7 +269,7 @@ int qxl_alloc_bo_reserved(struct qxl_device *qdev,
>   	int ret;
>   
>   	ret = qxl_bo_create(qdev, size, false /* not kernel - device */,
> -			    false, QXL_GEM_DOMAIN_VRAM, NULL, &bo);
> +			    false, QXL_GEM_DOMAIN_VRAM, 0, NULL, &bo);
>   	if (ret) {
>   		DRM_ERROR("failed to allocate VRAM BO\n");
>   		return ret;
> diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c
> index ec50d2cfd4e1..a1b5cc5918bc 100644
> --- a/drivers/gpu/drm/qxl/qxl_display.c
> +++ b/drivers/gpu/drm/qxl/qxl_display.c
> @@ -799,8 +799,8 @@ static int qxl_plane_prepare_fb(struct drm_plane *plane,
>   				qdev->dumb_shadow_bo = NULL;
>   			}
>   			qxl_bo_create(qdev, surf.height * surf.stride,
> -				      true, true, QXL_GEM_DOMAIN_SURFACE, &surf,
> -				      &qdev->dumb_shadow_bo);
> +				      true, true, QXL_GEM_DOMAIN_SURFACE, 0,
> +				      &surf, &qdev->dumb_shadow_bo);
>   		}
>   		if (user_bo->shadow != qdev->dumb_shadow_bo) {
>   			if (user_bo->shadow) {
> diff --git a/drivers/gpu/drm/qxl/qxl_gem.c b/drivers/gpu/drm/qxl/qxl_gem.c
> index 48e096285b4c..a08da0bd9098 100644
> --- a/drivers/gpu/drm/qxl/qxl_gem.c
> +++ b/drivers/gpu/drm/qxl/qxl_gem.c
> @@ -55,7 +55,7 @@ int qxl_gem_object_create(struct qxl_device *qdev, int size,
>   	/* At least align on page size */
>   	if (alignment < PAGE_SIZE)
>   		alignment = PAGE_SIZE;
> -	r = qxl_bo_create(qdev, size, kernel, false, initial_domain, surf, &qbo);
> +	r = qxl_bo_create(qdev, size, kernel, false, initial_domain, 0, surf, &qbo);
>   	if (r) {
>   		if (r != -ERESTARTSYS)
>   			DRM_ERROR(
> diff --git a/drivers/gpu/drm/qxl/qxl_object.c b/drivers/gpu/drm/qxl/qxl_object.c
> index 705b51535492..7eada4ad217b 100644
> --- a/drivers/gpu/drm/qxl/qxl_object.c
> +++ b/drivers/gpu/drm/qxl/qxl_object.c
> @@ -103,8 +103,8 @@ static const struct drm_gem_object_funcs qxl_object_funcs = {
>   	.print_info = drm_gem_ttm_print_info,
>   };
>   
> -int qxl_bo_create(struct qxl_device *qdev,
> -		  unsigned long size, bool kernel, bool pinned, u32 domain,
> +int qxl_bo_create(struct qxl_device *qdev, unsigned long size,
> +		  bool kernel, bool pinned, u32 domain, u32 priority,
>   		  struct qxl_surface *surf,
>   		  struct qxl_bo **bo_ptr)
>   {
> @@ -137,6 +137,7 @@ int qxl_bo_create(struct qxl_device *qdev,
>   
>   	qxl_ttm_placement_from_domain(bo, domain);
>   
> +	bo->tbo.priority = priority;
>   	r = ttm_bo_init_reserved(&qdev->mman.bdev, &bo->tbo, size, type,
>   				 &bo->placement, 0, &ctx, NULL, NULL,
>   				 &qxl_ttm_bo_destroy);
> diff --git a/drivers/gpu/drm/qxl/qxl_release.c b/drivers/gpu/drm/qxl/qxl_release.c
> index 579c6de10c8e..716d706ca7f0 100644
> --- a/drivers/gpu/drm/qxl/qxl_release.c
> +++ b/drivers/gpu/drm/qxl/qxl_release.c
> @@ -160,11 +160,12 @@ qxl_release_free(struct qxl_device *qdev,
>   }
>   
>   static int qxl_release_bo_alloc(struct qxl_device *qdev,
> -				struct qxl_bo **bo)
> +				struct qxl_bo **bo,
> +				u32 priority)
>   {
>   	/* pin releases bo's they are too messy to evict */
>   	return qxl_bo_create(qdev, PAGE_SIZE, false, true,
> -			     QXL_GEM_DOMAIN_VRAM, NULL, bo);
> +			     QXL_GEM_DOMAIN_VRAM, priority, NULL, bo);
>   }
>   
>   int qxl_release_list_add(struct qxl_release *release, struct qxl_bo *bo)
> @@ -287,13 +288,18 @@ int qxl_alloc_release_reserved(struct qxl_device *qdev, unsigned long size,
>   	int ret = 0;
>   	union qxl_release_info *info;
>   	int cur_idx;
> +	u32 priority;
>   
> -	if (type == QXL_RELEASE_DRAWABLE)
> +	if (type == QXL_RELEASE_DRAWABLE) {
>   		cur_idx = 0;
> -	else if (type == QXL_RELEASE_SURFACE_CMD)
> +		priority = 0;
> +	} else if (type == QXL_RELEASE_SURFACE_CMD) {
>   		cur_idx = 1;
> -	else if (type == QXL_RELEASE_CURSOR_CMD)
> +		priority = 1;
> +	} else if (type == QXL_RELEASE_CURSOR_CMD) {
>   		cur_idx = 2;
> +		priority = 1;
> +	}
>   	else {
>   		DRM_ERROR("got illegal type: %d\n", type);
>   		return -EINVAL;
> @@ -315,7 +321,7 @@ int qxl_alloc_release_reserved(struct qxl_device *qdev, unsigned long size,
>   		qdev->current_release_bo[cur_idx] = NULL;
>   	}
>   	if (!qdev->current_release_bo[cur_idx]) {
> -		ret = qxl_release_bo_alloc(qdev, &qdev->current_release_bo[cur_idx]);
> +		ret = qxl_release_bo_alloc(qdev, &qdev->current_release_bo[cur_idx], priority);
>   		if (ret) {
>   			mutex_unlock(&qdev->release_mutex);
>   			qxl_release_free(qdev, *release);
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer


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[PATCH v2 04/11] drm/qxl: fix lockdep issue in qxl_alloc_release_reserved

[Gerd Hoffmann]

Call qxl_bo_unpin (which does a reservation) without holding the
release_mutex lock.  Fixes lockdep (correctly) warning on a possible
deadlock.

Fixes: 65ffea3c6e73 ("drm/qxl: unpin release objects")
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 drivers/gpu/drm/qxl/qxl_release.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/qxl/qxl_release.c b/drivers/gpu/drm/qxl/qxl_release.c
index 716d706ca7f0..f5845c96d414 100644
--- a/drivers/gpu/drm/qxl/qxl_release.c
+++ b/drivers/gpu/drm/qxl/qxl_release.c
@@ -283,7 +283,7 @@ int qxl_alloc_release_reserved(struct qxl_device *qdev, unsigned long size,
 				       int type, struct qxl_release **release,
 				       struct qxl_bo **rbo)
 {
-	struct qxl_bo *bo;
+	struct qxl_bo *bo, *free_bo = NULL;
 	int idr_ret;
 	int ret = 0;
 	union qxl_release_info *info;
@@ -315,8 +315,7 @@ int qxl_alloc_release_reserved(struct qxl_device *qdev, unsigned long size,
 
 	mutex_lock(&qdev->release_mutex);
 	if (qdev->current_release_bo_offset[cur_idx] + 1 >= releases_per_bo[cur_idx]) {
-		qxl_bo_unpin(qdev->current_release_bo[cur_idx]);
-		qxl_bo_unref(&qdev->current_release_bo[cur_idx]);
+		free_bo = qdev->current_release_bo[cur_idx];
 		qdev->current_release_bo_offset[cur_idx] = 0;
 		qdev->current_release_bo[cur_idx] = NULL;
 	}
@@ -324,6 +323,10 @@ int qxl_alloc_release_reserved(struct qxl_device *qdev, unsigned long size,
 		ret = qxl_release_bo_alloc(qdev, &qdev->current_release_bo[cur_idx], priority);
 		if (ret) {
 			mutex_unlock(&qdev->release_mutex);
+			if (free_bo) {
+				qxl_bo_unpin(free_bo);
+				qxl_bo_unref(&free_bo);
+			}
 			qxl_release_free(qdev, *release);
 			return ret;
 		}
@@ -339,6 +342,10 @@ int qxl_alloc_release_reserved(struct qxl_device *qdev, unsigned long size,
 		*rbo = bo;
 
 	mutex_unlock(&qdev->release_mutex);
+	if (free_bo) {
+		qxl_bo_unpin(free_bo);
+		qxl_bo_unref(&free_bo);
+	}
 
 	ret = qxl_release_list_add(*release, bo);
 	qxl_bo_unref(&bo);
-- 
2.29.2

Re: [PATCH v2 04/11] drm/qxl: fix lockdep issue in qxl_alloc_release_reserved

[Thomas Zimmermann]

[-- Attachment #1.1: Type: text/plain, Size: 2499 bytes --]



Am 17.02.21 um 13:32 schrieb Gerd Hoffmann:
> Call qxl_bo_unpin (which does a reservation) without holding the
> release_mutex lock.  Fixes lockdep (correctly) warning on a possible
> deadlock.
> 
> Fixes: 65ffea3c6e73 ("drm/qxl: unpin release objects")
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

Acked-by: Thomas Zimmermann <tzimmermann@suse.de>

> ---
>   drivers/gpu/drm/qxl/qxl_release.c | 13 ++++++++++---
>   1 file changed, 10 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/qxl/qxl_release.c b/drivers/gpu/drm/qxl/qxl_release.c
> index 716d706ca7f0..f5845c96d414 100644
> --- a/drivers/gpu/drm/qxl/qxl_release.c
> +++ b/drivers/gpu/drm/qxl/qxl_release.c
> @@ -283,7 +283,7 @@ int qxl_alloc_release_reserved(struct qxl_device *qdev, unsigned long size,
>   				       int type, struct qxl_release **release,
>   				       struct qxl_bo **rbo)
>   {
> -	struct qxl_bo *bo;
> +	struct qxl_bo *bo, *free_bo = NULL;
>   	int idr_ret;
>   	int ret = 0;
>   	union qxl_release_info *info;
> @@ -315,8 +315,7 @@ int qxl_alloc_release_reserved(struct qxl_device *qdev, unsigned long size,
>   
>   	mutex_lock(&qdev->release_mutex);
>   	if (qdev->current_release_bo_offset[cur_idx] + 1 >= releases_per_bo[cur_idx]) {
> -		qxl_bo_unpin(qdev->current_release_bo[cur_idx]);
> -		qxl_bo_unref(&qdev->current_release_bo[cur_idx]);
> +		free_bo = qdev->current_release_bo[cur_idx];
>   		qdev->current_release_bo_offset[cur_idx] = 0;
>   		qdev->current_release_bo[cur_idx] = NULL;
>   	}
> @@ -324,6 +323,10 @@ int qxl_alloc_release_reserved(struct qxl_device *qdev, unsigned long size,
>   		ret = qxl_release_bo_alloc(qdev, &qdev->current_release_bo[cur_idx], priority);
>   		if (ret) {
>   			mutex_unlock(&qdev->release_mutex);
> +			if (free_bo) {
> +				qxl_bo_unpin(free_bo);
> +				qxl_bo_unref(&free_bo);
> +			}
>   			qxl_release_free(qdev, *release);
>   			return ret;
>   		}
> @@ -339,6 +342,10 @@ int qxl_alloc_release_reserved(struct qxl_device *qdev, unsigned long size,
>   		*rbo = bo;
>   
>   	mutex_unlock(&qdev->release_mutex);
> +	if (free_bo) {
> +		qxl_bo_unpin(free_bo);
> +		qxl_bo_unref(&free_bo);
> +	}
>   
>   	ret = qxl_release_list_add(*release, bo);
>   	qxl_bo_unref(&bo);
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer


[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 840 bytes --]

[PATCH v2 05/11] drm/qxl: rename qxl_bo_kmap -> qxl_bo_vmap_locked

[Gerd Hoffmann]

Append _locked to Make clear that these functions should be called with
reserved bo's only.  While being at it also rename kmap -> vmap.

No functional change.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 drivers/gpu/drm/qxl/qxl_object.h  |  4 ++--
 drivers/gpu/drm/qxl/qxl_display.c | 14 +++++++-------
 drivers/gpu/drm/qxl/qxl_draw.c    |  8 ++++----
 drivers/gpu/drm/qxl/qxl_image.c   |  2 +-
 drivers/gpu/drm/qxl/qxl_object.c  |  8 ++++----
 drivers/gpu/drm/qxl/qxl_prime.c   |  4 ++--
 6 files changed, 20 insertions(+), 20 deletions(-)

diff --git a/drivers/gpu/drm/qxl/qxl_object.h b/drivers/gpu/drm/qxl/qxl_object.h
index dc1659e717f1..2495e5cdf353 100644
--- a/drivers/gpu/drm/qxl/qxl_object.h
+++ b/drivers/gpu/drm/qxl/qxl_object.h
@@ -64,8 +64,8 @@ extern int qxl_bo_create(struct qxl_device *qdev,
 			 u32 priority,
 			 struct qxl_surface *surf,
 			 struct qxl_bo **bo_ptr);
-extern int qxl_bo_kmap(struct qxl_bo *bo, struct dma_buf_map *map);
-extern void qxl_bo_kunmap(struct qxl_bo *bo);
+int qxl_bo_vmap_locked(struct qxl_bo *bo, struct dma_buf_map *map);
+void qxl_bo_vunmap_locked(struct qxl_bo *bo);
 void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev, struct qxl_bo *bo, int page_offset);
 void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev, struct qxl_bo *bo, void *map);
 extern struct qxl_bo *qxl_bo_ref(struct qxl_bo *bo);
diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c
index a1b5cc5918bc..bfcc93089a94 100644
--- a/drivers/gpu/drm/qxl/qxl_display.c
+++ b/drivers/gpu/drm/qxl/qxl_display.c
@@ -600,7 +600,7 @@ static void qxl_cursor_atomic_update(struct drm_plane *plane,
 		user_bo = gem_to_qxl_bo(obj);
 
 		/* pinning is done in the prepare/cleanup framevbuffer */
-		ret = qxl_bo_kmap(user_bo, &user_map);
+		ret = qxl_bo_vmap_locked(user_bo, &user_map);
 		if (ret)
 			goto out_free_release;
 		user_ptr = user_map.vaddr; /* TODO: Use mapping abstraction properly */
@@ -619,7 +619,7 @@ static void qxl_cursor_atomic_update(struct drm_plane *plane,
 		if (ret)
 			goto out_unpin;
 
-		ret = qxl_bo_kmap(cursor_bo, &cursor_map);
+		ret = qxl_bo_vmap_locked(cursor_bo, &cursor_map);
 		if (ret)
 			goto out_backoff;
 		if (cursor_map.is_iomem) /* TODO: Use mapping abstraction properly */
@@ -638,8 +638,8 @@ static void qxl_cursor_atomic_update(struct drm_plane *plane,
 		cursor->chunk.prev_chunk = 0;
 		cursor->chunk.data_size = size;
 		memcpy(cursor->chunk.data, user_ptr, size);
-		qxl_bo_kunmap(cursor_bo);
-		qxl_bo_kunmap(user_bo);
+		qxl_bo_vunmap_locked(cursor_bo);
+		qxl_bo_vunmap_locked(user_bo);
 
 		cmd = (struct qxl_cursor_cmd *) qxl_release_map(qdev, release);
 		cmd->u.set.visible = 1;
@@ -681,7 +681,7 @@ static void qxl_cursor_atomic_update(struct drm_plane *plane,
 out_free_bo:
 	qxl_bo_unref(&cursor_bo);
 out_kunmap:
-	qxl_bo_kunmap(user_bo);
+	qxl_bo_vunmap_locked(user_bo);
 out_free_release:
 	qxl_release_free(qdev, release);
 	return;
@@ -1163,7 +1163,7 @@ int qxl_create_monitors_object(struct qxl_device *qdev)
 	if (ret)
 		return ret;
 
-	qxl_bo_kmap(qdev->monitors_config_bo, &map);
+	qxl_bo_vmap_locked(qdev->monitors_config_bo, &map);
 
 	qdev->monitors_config = qdev->monitors_config_bo->kptr;
 	qdev->ram_header->monitors_config =
@@ -1189,7 +1189,7 @@ int qxl_destroy_monitors_object(struct qxl_device *qdev)
 	qdev->monitors_config = NULL;
 	qdev->ram_header->monitors_config = 0;
 
-	qxl_bo_kunmap(qdev->monitors_config_bo);
+	qxl_bo_vunmap_locked(qdev->monitors_config_bo);
 	ret = qxl_bo_unpin(qdev->monitors_config_bo);
 	if (ret)
 		return ret;
diff --git a/drivers/gpu/drm/qxl/qxl_draw.c b/drivers/gpu/drm/qxl/qxl_draw.c
index 7b7acb910780..7d27891e87fa 100644
--- a/drivers/gpu/drm/qxl/qxl_draw.c
+++ b/drivers/gpu/drm/qxl/qxl_draw.c
@@ -48,7 +48,7 @@ static struct qxl_rect *drawable_set_clipping(struct qxl_device *qdev,
 	struct qxl_clip_rects *dev_clips;
 	int ret;
 
-	ret = qxl_bo_kmap(clips_bo, &map);
+	ret = qxl_bo_vmap_locked(clips_bo, &map);
 	if (ret)
 		return NULL;
 	dev_clips = map.vaddr; /* TODO: Use mapping abstraction properly */
@@ -202,7 +202,7 @@ void qxl_draw_dirty_fb(struct qxl_device *qdev,
 	if (ret)
 		goto out_release_backoff;
 
-	ret = qxl_bo_kmap(bo, &surface_map);
+	ret = qxl_bo_vmap_locked(bo, &surface_map);
 	if (ret)
 		goto out_release_backoff;
 	surface_base = surface_map.vaddr; /* TODO: Use mapping abstraction properly */
@@ -210,7 +210,7 @@ void qxl_draw_dirty_fb(struct qxl_device *qdev,
 	ret = qxl_image_init(qdev, release, dimage, surface_base,
 			     left - dumb_shadow_offset,
 			     top, width, height, depth, stride);
-	qxl_bo_kunmap(bo);
+	qxl_bo_vunmap_locked(bo);
 	if (ret)
 		goto out_release_backoff;
 
@@ -247,7 +247,7 @@ void qxl_draw_dirty_fb(struct qxl_device *qdev,
 		rects[i].top    = clips_ptr->y1;
 		rects[i].bottom = clips_ptr->y2;
 	}
-	qxl_bo_kunmap(clips_bo);
+	qxl_bo_vunmap_locked(clips_bo);
 
 	qxl_release_fence_buffer_objects(release);
 	qxl_push_command_ring_release(qdev, release, QXL_CMD_DRAW, false);
diff --git a/drivers/gpu/drm/qxl/qxl_image.c b/drivers/gpu/drm/qxl/qxl_image.c
index 60ab7151b84d..ffff54e5fb31 100644
--- a/drivers/gpu/drm/qxl/qxl_image.c
+++ b/drivers/gpu/drm/qxl/qxl_image.c
@@ -186,7 +186,7 @@ qxl_image_init_helper(struct qxl_device *qdev,
 			}
 		}
 	}
-	qxl_bo_kunmap(chunk_bo);
+	qxl_bo_vunmap_locked(chunk_bo);
 
 	image_bo = dimage->bo;
 	ptr = qxl_bo_kmap_atomic_page(qdev, image_bo, 0);
diff --git a/drivers/gpu/drm/qxl/qxl_object.c b/drivers/gpu/drm/qxl/qxl_object.c
index 7eada4ad217b..f4a015381a7f 100644
--- a/drivers/gpu/drm/qxl/qxl_object.c
+++ b/drivers/gpu/drm/qxl/qxl_object.c
@@ -155,7 +155,7 @@ int qxl_bo_create(struct qxl_device *qdev, unsigned long size,
 	return 0;
 }
 
-int qxl_bo_kmap(struct qxl_bo *bo, struct dma_buf_map *map)
+int qxl_bo_vmap_locked(struct qxl_bo *bo, struct dma_buf_map *map)
 {
 	int r;
 
@@ -203,7 +203,7 @@ void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev,
 		return rptr;
 	}
 
-	ret = qxl_bo_kmap(bo, &bo_map);
+	ret = qxl_bo_vmap_locked(bo, &bo_map);
 	if (ret)
 		return NULL;
 	rptr = bo_map.vaddr; /* TODO: Use mapping abstraction properly */
@@ -212,7 +212,7 @@ void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev,
 	return rptr;
 }
 
-void qxl_bo_kunmap(struct qxl_bo *bo)
+void qxl_bo_vunmap_locked(struct qxl_bo *bo)
 {
 	if (bo->kptr == NULL)
 		return;
@@ -233,7 +233,7 @@ void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev,
 	io_mapping_unmap_atomic(pmap);
 	return;
  fallback:
-	qxl_bo_kunmap(bo);
+	qxl_bo_vunmap_locked(bo);
 }
 
 void qxl_bo_unref(struct qxl_bo **bo)
diff --git a/drivers/gpu/drm/qxl/qxl_prime.c b/drivers/gpu/drm/qxl/qxl_prime.c
index 4aa949799446..2bebe662516f 100644
--- a/drivers/gpu/drm/qxl/qxl_prime.c
+++ b/drivers/gpu/drm/qxl/qxl_prime.c
@@ -59,7 +59,7 @@ int qxl_gem_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map)
 	struct qxl_bo *bo = gem_to_qxl_bo(obj);
 	int ret;
 
-	ret = qxl_bo_kmap(bo, map);
+	ret = qxl_bo_vmap_locked(bo, map);
 	if (ret < 0)
 		return ret;
 
@@ -71,7 +71,7 @@ void qxl_gem_prime_vunmap(struct drm_gem_object *obj,
 {
 	struct qxl_bo *bo = gem_to_qxl_bo(obj);
 
-	qxl_bo_kunmap(bo);
+	qxl_bo_vunmap_locked(bo);
 }
 
 int qxl_gem_prime_mmap(struct drm_gem_object *obj,
-- 
2.29.2

Re: [PATCH v2 05/11] drm/qxl: rename qxl_bo_kmap -> qxl_bo_vmap_locked

[Thomas Zimmermann]

[-- Attachment #1.1: Type: text/plain, Size: 8298 bytes --]



Am 17.02.21 um 13:32 schrieb Gerd Hoffmann:
> Append _locked to Make clear that these functions should be called with
> reserved bo's only.  While being at it also rename kmap -> vmap.
> 
> No functional change.
> 
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

Acked-by: Thomas Zimmermann <tzimmermann@suse.de>

> ---
>   drivers/gpu/drm/qxl/qxl_object.h  |  4 ++--
>   drivers/gpu/drm/qxl/qxl_display.c | 14 +++++++-------
>   drivers/gpu/drm/qxl/qxl_draw.c    |  8 ++++----
>   drivers/gpu/drm/qxl/qxl_image.c   |  2 +-
>   drivers/gpu/drm/qxl/qxl_object.c  |  8 ++++----
>   drivers/gpu/drm/qxl/qxl_prime.c   |  4 ++--
>   6 files changed, 20 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/gpu/drm/qxl/qxl_object.h b/drivers/gpu/drm/qxl/qxl_object.h
> index dc1659e717f1..2495e5cdf353 100644
> --- a/drivers/gpu/drm/qxl/qxl_object.h
> +++ b/drivers/gpu/drm/qxl/qxl_object.h
> @@ -64,8 +64,8 @@ extern int qxl_bo_create(struct qxl_device *qdev,
>   			 u32 priority,
>   			 struct qxl_surface *surf,
>   			 struct qxl_bo **bo_ptr);
> -extern int qxl_bo_kmap(struct qxl_bo *bo, struct dma_buf_map *map);
> -extern void qxl_bo_kunmap(struct qxl_bo *bo);
> +int qxl_bo_vmap_locked(struct qxl_bo *bo, struct dma_buf_map *map);
> +void qxl_bo_vunmap_locked(struct qxl_bo *bo);
>   void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev, struct qxl_bo *bo, int page_offset);
>   void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev, struct qxl_bo *bo, void *map);
>   extern struct qxl_bo *qxl_bo_ref(struct qxl_bo *bo);
> diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c
> index a1b5cc5918bc..bfcc93089a94 100644
> --- a/drivers/gpu/drm/qxl/qxl_display.c
> +++ b/drivers/gpu/drm/qxl/qxl_display.c
> @@ -600,7 +600,7 @@ static void qxl_cursor_atomic_update(struct drm_plane *plane,
>   		user_bo = gem_to_qxl_bo(obj);
>   
>   		/* pinning is done in the prepare/cleanup framevbuffer */
> -		ret = qxl_bo_kmap(user_bo, &user_map);
> +		ret = qxl_bo_vmap_locked(user_bo, &user_map);
>   		if (ret)
>   			goto out_free_release;
>   		user_ptr = user_map.vaddr; /* TODO: Use mapping abstraction properly */
> @@ -619,7 +619,7 @@ static void qxl_cursor_atomic_update(struct drm_plane *plane,
>   		if (ret)
>   			goto out_unpin;
>   
> -		ret = qxl_bo_kmap(cursor_bo, &cursor_map);
> +		ret = qxl_bo_vmap_locked(cursor_bo, &cursor_map);
>   		if (ret)
>   			goto out_backoff;
>   		if (cursor_map.is_iomem) /* TODO: Use mapping abstraction properly */
> @@ -638,8 +638,8 @@ static void qxl_cursor_atomic_update(struct drm_plane *plane,
>   		cursor->chunk.prev_chunk = 0;
>   		cursor->chunk.data_size = size;
>   		memcpy(cursor->chunk.data, user_ptr, size);
> -		qxl_bo_kunmap(cursor_bo);
> -		qxl_bo_kunmap(user_bo);
> +		qxl_bo_vunmap_locked(cursor_bo);
> +		qxl_bo_vunmap_locked(user_bo);
>   
>   		cmd = (struct qxl_cursor_cmd *) qxl_release_map(qdev, release);
>   		cmd->u.set.visible = 1;
> @@ -681,7 +681,7 @@ static void qxl_cursor_atomic_update(struct drm_plane *plane,
>   out_free_bo:
>   	qxl_bo_unref(&cursor_bo);
>   out_kunmap:
> -	qxl_bo_kunmap(user_bo);
> +	qxl_bo_vunmap_locked(user_bo);
>   out_free_release:
>   	qxl_release_free(qdev, release);
>   	return;
> @@ -1163,7 +1163,7 @@ int qxl_create_monitors_object(struct qxl_device *qdev)
>   	if (ret)
>   		return ret;
>   
> -	qxl_bo_kmap(qdev->monitors_config_bo, &map);
> +	qxl_bo_vmap_locked(qdev->monitors_config_bo, &map);
>   
>   	qdev->monitors_config = qdev->monitors_config_bo->kptr;
>   	qdev->ram_header->monitors_config =
> @@ -1189,7 +1189,7 @@ int qxl_destroy_monitors_object(struct qxl_device *qdev)
>   	qdev->monitors_config = NULL;
>   	qdev->ram_header->monitors_config = 0;
>   
> -	qxl_bo_kunmap(qdev->monitors_config_bo);
> +	qxl_bo_vunmap_locked(qdev->monitors_config_bo);
>   	ret = qxl_bo_unpin(qdev->monitors_config_bo);
>   	if (ret)
>   		return ret;
> diff --git a/drivers/gpu/drm/qxl/qxl_draw.c b/drivers/gpu/drm/qxl/qxl_draw.c
> index 7b7acb910780..7d27891e87fa 100644
> --- a/drivers/gpu/drm/qxl/qxl_draw.c
> +++ b/drivers/gpu/drm/qxl/qxl_draw.c
> @@ -48,7 +48,7 @@ static struct qxl_rect *drawable_set_clipping(struct qxl_device *qdev,
>   	struct qxl_clip_rects *dev_clips;
>   	int ret;
>   
> -	ret = qxl_bo_kmap(clips_bo, &map);
> +	ret = qxl_bo_vmap_locked(clips_bo, &map);
>   	if (ret)
>   		return NULL;
>   	dev_clips = map.vaddr; /* TODO: Use mapping abstraction properly */
> @@ -202,7 +202,7 @@ void qxl_draw_dirty_fb(struct qxl_device *qdev,
>   	if (ret)
>   		goto out_release_backoff;
>   
> -	ret = qxl_bo_kmap(bo, &surface_map);
> +	ret = qxl_bo_vmap_locked(bo, &surface_map);
>   	if (ret)
>   		goto out_release_backoff;
>   	surface_base = surface_map.vaddr; /* TODO: Use mapping abstraction properly */
> @@ -210,7 +210,7 @@ void qxl_draw_dirty_fb(struct qxl_device *qdev,
>   	ret = qxl_image_init(qdev, release, dimage, surface_base,
>   			     left - dumb_shadow_offset,
>   			     top, width, height, depth, stride);
> -	qxl_bo_kunmap(bo);
> +	qxl_bo_vunmap_locked(bo);
>   	if (ret)
>   		goto out_release_backoff;
>   
> @@ -247,7 +247,7 @@ void qxl_draw_dirty_fb(struct qxl_device *qdev,
>   		rects[i].top    = clips_ptr->y1;
>   		rects[i].bottom = clips_ptr->y2;
>   	}
> -	qxl_bo_kunmap(clips_bo);
> +	qxl_bo_vunmap_locked(clips_bo);
>   
>   	qxl_release_fence_buffer_objects(release);
>   	qxl_push_command_ring_release(qdev, release, QXL_CMD_DRAW, false);
> diff --git a/drivers/gpu/drm/qxl/qxl_image.c b/drivers/gpu/drm/qxl/qxl_image.c
> index 60ab7151b84d..ffff54e5fb31 100644
> --- a/drivers/gpu/drm/qxl/qxl_image.c
> +++ b/drivers/gpu/drm/qxl/qxl_image.c
> @@ -186,7 +186,7 @@ qxl_image_init_helper(struct qxl_device *qdev,
>   			}
>   		}
>   	}
> -	qxl_bo_kunmap(chunk_bo);
> +	qxl_bo_vunmap_locked(chunk_bo);
>   
>   	image_bo = dimage->bo;
>   	ptr = qxl_bo_kmap_atomic_page(qdev, image_bo, 0);
> diff --git a/drivers/gpu/drm/qxl/qxl_object.c b/drivers/gpu/drm/qxl/qxl_object.c
> index 7eada4ad217b..f4a015381a7f 100644
> --- a/drivers/gpu/drm/qxl/qxl_object.c
> +++ b/drivers/gpu/drm/qxl/qxl_object.c
> @@ -155,7 +155,7 @@ int qxl_bo_create(struct qxl_device *qdev, unsigned long size,
>   	return 0;
>   }
>   
> -int qxl_bo_kmap(struct qxl_bo *bo, struct dma_buf_map *map)
> +int qxl_bo_vmap_locked(struct qxl_bo *bo, struct dma_buf_map *map)
>   {
>   	int r;
>   
> @@ -203,7 +203,7 @@ void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev,
>   		return rptr;
>   	}
>   
> -	ret = qxl_bo_kmap(bo, &bo_map);
> +	ret = qxl_bo_vmap_locked(bo, &bo_map);
>   	if (ret)
>   		return NULL;
>   	rptr = bo_map.vaddr; /* TODO: Use mapping abstraction properly */
> @@ -212,7 +212,7 @@ void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev,
>   	return rptr;
>   }
>   
> -void qxl_bo_kunmap(struct qxl_bo *bo)
> +void qxl_bo_vunmap_locked(struct qxl_bo *bo)
>   {
>   	if (bo->kptr == NULL)
>   		return;
> @@ -233,7 +233,7 @@ void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev,
>   	io_mapping_unmap_atomic(pmap);
>   	return;
>    fallback:
> -	qxl_bo_kunmap(bo);
> +	qxl_bo_vunmap_locked(bo);
>   }
>   
>   void qxl_bo_unref(struct qxl_bo **bo)
> diff --git a/drivers/gpu/drm/qxl/qxl_prime.c b/drivers/gpu/drm/qxl/qxl_prime.c
> index 4aa949799446..2bebe662516f 100644
> --- a/drivers/gpu/drm/qxl/qxl_prime.c
> +++ b/drivers/gpu/drm/qxl/qxl_prime.c
> @@ -59,7 +59,7 @@ int qxl_gem_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map)
>   	struct qxl_bo *bo = gem_to_qxl_bo(obj);
>   	int ret;
>   
> -	ret = qxl_bo_kmap(bo, map);
> +	ret = qxl_bo_vmap_locked(bo, map);
>   	if (ret < 0)
>   		return ret;
>   
> @@ -71,7 +71,7 @@ void qxl_gem_prime_vunmap(struct drm_gem_object *obj,
>   {
>   	struct qxl_bo *bo = gem_to_qxl_bo(obj);
>   
> -	qxl_bo_kunmap(bo);
> +	qxl_bo_vunmap_locked(bo);
>   }
>   
>   int qxl_gem_prime_mmap(struct drm_gem_object *obj,
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer


[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 840 bytes --]

[PATCH v2 06/11] drm/qxl: add qxl_bo_vmap/qxl_bo_vunmap

[Gerd Hoffmann]

Add vmap/vunmap variants which reserve (and pin) the bo.
They can be used in case the caller doesn't hold a reservation
for the bo.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 drivers/gpu/drm/qxl/qxl_object.h |  2 ++
 drivers/gpu/drm/qxl/qxl_object.c | 36 ++++++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+)

diff --git a/drivers/gpu/drm/qxl/qxl_object.h b/drivers/gpu/drm/qxl/qxl_object.h
index 2495e5cdf353..ee9c29de4d3d 100644
--- a/drivers/gpu/drm/qxl/qxl_object.h
+++ b/drivers/gpu/drm/qxl/qxl_object.h
@@ -64,7 +64,9 @@ extern int qxl_bo_create(struct qxl_device *qdev,
 			 u32 priority,
 			 struct qxl_surface *surf,
 			 struct qxl_bo **bo_ptr);
+int qxl_bo_vmap(struct qxl_bo *bo, struct dma_buf_map *map);
 int qxl_bo_vmap_locked(struct qxl_bo *bo, struct dma_buf_map *map);
+int qxl_bo_vunmap(struct qxl_bo *bo);
 void qxl_bo_vunmap_locked(struct qxl_bo *bo);
 void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev, struct qxl_bo *bo, int page_offset);
 void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev, struct qxl_bo *bo, void *map);
diff --git a/drivers/gpu/drm/qxl/qxl_object.c b/drivers/gpu/drm/qxl/qxl_object.c
index f4a015381a7f..82c3bf195ad6 100644
--- a/drivers/gpu/drm/qxl/qxl_object.c
+++ b/drivers/gpu/drm/qxl/qxl_object.c
@@ -29,6 +29,9 @@
 #include "qxl_drv.h"
 #include "qxl_object.h"
 
+static int __qxl_bo_pin(struct qxl_bo *bo);
+static void __qxl_bo_unpin(struct qxl_bo *bo);
+
 static void qxl_ttm_bo_destroy(struct ttm_buffer_object *tbo)
 {
 	struct qxl_bo *bo;
@@ -179,6 +182,25 @@ int qxl_bo_vmap_locked(struct qxl_bo *bo, struct dma_buf_map *map)
 	return 0;
 }
 
+int qxl_bo_vmap(struct qxl_bo *bo, struct dma_buf_map *map)
+{
+	int r;
+
+	r = qxl_bo_reserve(bo);
+	if (r)
+		return r;
+
+	r = __qxl_bo_pin(bo);
+	if (r) {
+		qxl_bo_unreserve(bo);
+		return r;
+	}
+
+	r = qxl_bo_vmap_locked(bo, map);
+	qxl_bo_unreserve(bo);
+	return r;
+}
+
 void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev,
 			      struct qxl_bo *bo, int page_offset)
 {
@@ -223,6 +245,20 @@ void qxl_bo_vunmap_locked(struct qxl_bo *bo)
 	ttm_bo_vunmap(&bo->tbo, &bo->map);
 }
 
+int qxl_bo_vunmap(struct qxl_bo *bo)
+{
+	int r;
+
+	r = qxl_bo_reserve(bo);
+	if (r)
+		return r;
+
+	qxl_bo_vunmap_locked(bo);
+	__qxl_bo_unpin(bo);
+	qxl_bo_unreserve(bo);
+	return 0;
+}
+
 void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev,
 			       struct qxl_bo *bo, void *pmap)
 {
-- 
2.29.2

Re: [PATCH v2 06/11] drm/qxl: add qxl_bo_vmap/qxl_bo_vunmap

[Thomas Zimmermann]

[-- Attachment #1.1: Type: text/plain, Size: 3013 bytes --]



Am 17.02.21 um 13:32 schrieb Gerd Hoffmann:
> Add vmap/vunmap variants which reserve (and pin) the bo.
> They can be used in case the caller doesn't hold a reservation
> for the bo.
> 
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

Acked-by: Thomas Zimmermann <tzimmermann@suse.de>

> ---
>   drivers/gpu/drm/qxl/qxl_object.h |  2 ++
>   drivers/gpu/drm/qxl/qxl_object.c | 36 ++++++++++++++++++++++++++++++++
>   2 files changed, 38 insertions(+)
> 
> diff --git a/drivers/gpu/drm/qxl/qxl_object.h b/drivers/gpu/drm/qxl/qxl_object.h
> index 2495e5cdf353..ee9c29de4d3d 100644
> --- a/drivers/gpu/drm/qxl/qxl_object.h
> +++ b/drivers/gpu/drm/qxl/qxl_object.h
> @@ -64,7 +64,9 @@ extern int qxl_bo_create(struct qxl_device *qdev,
>   			 u32 priority,
>   			 struct qxl_surface *surf,
>   			 struct qxl_bo **bo_ptr);
> +int qxl_bo_vmap(struct qxl_bo *bo, struct dma_buf_map *map);
>   int qxl_bo_vmap_locked(struct qxl_bo *bo, struct dma_buf_map *map);
> +int qxl_bo_vunmap(struct qxl_bo *bo);
>   void qxl_bo_vunmap_locked(struct qxl_bo *bo);
>   void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev, struct qxl_bo *bo, int page_offset);
>   void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev, struct qxl_bo *bo, void *map);
> diff --git a/drivers/gpu/drm/qxl/qxl_object.c b/drivers/gpu/drm/qxl/qxl_object.c
> index f4a015381a7f..82c3bf195ad6 100644
> --- a/drivers/gpu/drm/qxl/qxl_object.c
> +++ b/drivers/gpu/drm/qxl/qxl_object.c
> @@ -29,6 +29,9 @@
>   #include "qxl_drv.h"
>   #include "qxl_object.h"
>   
> +static int __qxl_bo_pin(struct qxl_bo *bo);
> +static void __qxl_bo_unpin(struct qxl_bo *bo);
> +
>   static void qxl_ttm_bo_destroy(struct ttm_buffer_object *tbo)
>   {
>   	struct qxl_bo *bo;
> @@ -179,6 +182,25 @@ int qxl_bo_vmap_locked(struct qxl_bo *bo, struct dma_buf_map *map)
>   	return 0;
>   }
>   
> +int qxl_bo_vmap(struct qxl_bo *bo, struct dma_buf_map *map)
> +{
> +	int r;
> +
> +	r = qxl_bo_reserve(bo);
> +	if (r)
> +		return r;
> +
> +	r = __qxl_bo_pin(bo);
> +	if (r) {
> +		qxl_bo_unreserve(bo);
> +		return r;
> +	}
> +
> +	r = qxl_bo_vmap_locked(bo, map);
> +	qxl_bo_unreserve(bo);
> +	return r;
> +}
> +
>   void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev,
>   			      struct qxl_bo *bo, int page_offset)
>   {
> @@ -223,6 +245,20 @@ void qxl_bo_vunmap_locked(struct qxl_bo *bo)
>   	ttm_bo_vunmap(&bo->tbo, &bo->map);
>   }
>   
> +int qxl_bo_vunmap(struct qxl_bo *bo)
> +{
> +	int r;
> +
> +	r = qxl_bo_reserve(bo);
> +	if (r)
> +		return r;
> +
> +	qxl_bo_vunmap_locked(bo);
> +	__qxl_bo_unpin(bo);
> +	qxl_bo_unreserve(bo);
> +	return 0;
> +}
> +
>   void qxl_bo_kunmap_atomic_page(struct qxl_device *qdev,
>   			       struct qxl_bo *bo, void *pmap)
>   {
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer


[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 840 bytes --]

[PATCH v2 07/11] drm/qxl: fix prime vmap

[Gerd Hoffmann]

Use the correct vmap variant.  We don't have a reservation here,
so we can't use the _locked version.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/qxl/qxl_prime.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/qxl/qxl_prime.c b/drivers/gpu/drm/qxl/qxl_prime.c
index 2bebe662516f..0628d1cc91fe 100644
--- a/drivers/gpu/drm/qxl/qxl_prime.c
+++ b/drivers/gpu/drm/qxl/qxl_prime.c
@@ -59,7 +59,7 @@ int qxl_gem_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map)
 	struct qxl_bo *bo = gem_to_qxl_bo(obj);
 	int ret;
 
-	ret = qxl_bo_vmap_locked(bo, map);
+	ret = qxl_bo_vmap(bo, map);
 	if (ret < 0)
 		return ret;
 
@@ -71,7 +71,7 @@ void qxl_gem_prime_vunmap(struct drm_gem_object *obj,
 {
 	struct qxl_bo *bo = gem_to_qxl_bo(obj);
 
-	qxl_bo_vunmap_locked(bo);
+	qxl_bo_vunmap(bo);
 }
 
 int qxl_gem_prime_mmap(struct drm_gem_object *obj,
-- 
2.29.2

[PATCH v2 08/11] drm/qxl: fix monitors object vmap

[Gerd Hoffmann]

Use the correct vmap variant.  We don't hold a reservation here,
so we can't use the _locked variant.  We can drop the pin because
qxl_bo_vmap will do that for us.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 drivers/gpu/drm/qxl/qxl_display.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c
index bfcc93089a94..f106da917863 100644
--- a/drivers/gpu/drm/qxl/qxl_display.c
+++ b/drivers/gpu/drm/qxl/qxl_display.c
@@ -1159,12 +1159,10 @@ int qxl_create_monitors_object(struct qxl_device *qdev)
 	}
 	qdev->monitors_config_bo = gem_to_qxl_bo(gobj);
 
-	ret = qxl_bo_pin(qdev->monitors_config_bo);
+	ret = qxl_bo_vmap(qdev->monitors_config_bo, &map);
 	if (ret)
 		return ret;
 
-	qxl_bo_vmap_locked(qdev->monitors_config_bo, &map);
-
 	qdev->monitors_config = qdev->monitors_config_bo->kptr;
 	qdev->ram_header->monitors_config =
 		qxl_bo_physical_address(qdev, qdev->monitors_config_bo, 0);
@@ -1189,8 +1187,7 @@ int qxl_destroy_monitors_object(struct qxl_device *qdev)
 	qdev->monitors_config = NULL;
 	qdev->ram_header->monitors_config = 0;
 
-	qxl_bo_vunmap_locked(qdev->monitors_config_bo);
-	ret = qxl_bo_unpin(qdev->monitors_config_bo);
+	ret = qxl_bo_vunmap(qdev->monitors_config_bo);
 	if (ret)
 		return ret;
 
-- 
2.29.2

Re: [PATCH v2 08/11] drm/qxl: fix monitors object vmap

[Thomas Zimmermann]

[-- Attachment #1.1: Type: text/plain, Size: 1799 bytes --]



Am 17.02.21 um 13:32 schrieb Gerd Hoffmann:
> Use the correct vmap variant.  We don't hold a reservation here,
> so we can't use the _locked variant.  We can drop the pin because
> qxl_bo_vmap will do that for us.
> 
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

Acked-by: Thomas Zimmermann <tzimmermann@suse.de>

I simply forgot to ack this patch.

> ---
>   drivers/gpu/drm/qxl/qxl_display.c | 7 ++-----
>   1 file changed, 2 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c
> index bfcc93089a94..f106da917863 100644
> --- a/drivers/gpu/drm/qxl/qxl_display.c
> +++ b/drivers/gpu/drm/qxl/qxl_display.c
> @@ -1159,12 +1159,10 @@ int qxl_create_monitors_object(struct qxl_device *qdev)
>   	}
>   	qdev->monitors_config_bo = gem_to_qxl_bo(gobj);
>   
> -	ret = qxl_bo_pin(qdev->monitors_config_bo);
> +	ret = qxl_bo_vmap(qdev->monitors_config_bo, &map);
>   	if (ret)
>   		return ret;
>   
> -	qxl_bo_vmap_locked(qdev->monitors_config_bo, &map);
> -
>   	qdev->monitors_config = qdev->monitors_config_bo->kptr;
>   	qdev->ram_header->monitors_config =
>   		qxl_bo_physical_address(qdev, qdev->monitors_config_bo, 0);
> @@ -1189,8 +1187,7 @@ int qxl_destroy_monitors_object(struct qxl_device *qdev)
>   	qdev->monitors_config = NULL;
>   	qdev->ram_header->monitors_config = 0;
>   
> -	qxl_bo_vunmap_locked(qdev->monitors_config_bo);
> -	ret = qxl_bo_unpin(qdev->monitors_config_bo);
> +	ret = qxl_bo_vunmap(qdev->monitors_config_bo);
>   	if (ret)
>   		return ret;
>   
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer


[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 840 bytes --]

[PATCH v2 09/11] drm/qxl: move shadow handling to new qxl_prepare_shadow()

[Gerd Hoffmann]

Pure code motion, no functional change.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 drivers/gpu/drm/qxl/qxl_display.c | 61 +++++++++++++++++--------------
 1 file changed, 34 insertions(+), 27 deletions(-)

diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c
index f106da917863..b315d7484e21 100644
--- a/drivers/gpu/drm/qxl/qxl_display.c
+++ b/drivers/gpu/drm/qxl/qxl_display.c
@@ -771,13 +771,45 @@ static void qxl_calc_dumb_shadow(struct qxl_device *qdev,
 		DRM_DEBUG("%dx%d\n", surf->width, surf->height);
 }
 
+static void qxl_prepare_shadow(struct qxl_device *qdev, struct qxl_bo *user_bo,
+			       int crtc_index)
+{
+	struct qxl_surface surf;
+
+	qxl_update_dumb_head(qdev, crtc_index,
+			     user_bo);
+	qxl_calc_dumb_shadow(qdev, &surf);
+	if (!qdev->dumb_shadow_bo ||
+	    qdev->dumb_shadow_bo->surf.width  != surf.width ||
+	    qdev->dumb_shadow_bo->surf.height != surf.height) {
+		if (qdev->dumb_shadow_bo) {
+			drm_gem_object_put
+				(&qdev->dumb_shadow_bo->tbo.base);
+			qdev->dumb_shadow_bo = NULL;
+		}
+		qxl_bo_create(qdev, surf.height * surf.stride,
+			      true, true, QXL_GEM_DOMAIN_SURFACE, 0,
+			      &surf, &qdev->dumb_shadow_bo);
+	}
+	if (user_bo->shadow != qdev->dumb_shadow_bo) {
+		if (user_bo->shadow) {
+			qxl_bo_unpin(user_bo->shadow);
+			drm_gem_object_put
+				(&user_bo->shadow->tbo.base);
+			user_bo->shadow = NULL;
+		}
+		drm_gem_object_get(&qdev->dumb_shadow_bo->tbo.base);
+		user_bo->shadow = qdev->dumb_shadow_bo;
+		qxl_bo_pin(user_bo->shadow);
+	}
+}
+
 static int qxl_plane_prepare_fb(struct drm_plane *plane,
 				struct drm_plane_state *new_state)
 {
 	struct qxl_device *qdev = to_qxl(plane->dev);
 	struct drm_gem_object *obj;
 	struct qxl_bo *user_bo;
-	struct qxl_surface surf;
 
 	if (!new_state->fb)
 		return 0;
@@ -787,32 +819,7 @@ static int qxl_plane_prepare_fb(struct drm_plane *plane,
 
 	if (plane->type == DRM_PLANE_TYPE_PRIMARY &&
 	    user_bo->is_dumb) {
-		qxl_update_dumb_head(qdev, new_state->crtc->index,
-				     user_bo);
-		qxl_calc_dumb_shadow(qdev, &surf);
-		if (!qdev->dumb_shadow_bo ||
-		    qdev->dumb_shadow_bo->surf.width  != surf.width ||
-		    qdev->dumb_shadow_bo->surf.height != surf.height) {
-			if (qdev->dumb_shadow_bo) {
-				drm_gem_object_put
-					(&qdev->dumb_shadow_bo->tbo.base);
-				qdev->dumb_shadow_bo = NULL;
-			}
-			qxl_bo_create(qdev, surf.height * surf.stride,
-				      true, true, QXL_GEM_DOMAIN_SURFACE, 0,
-				      &surf, &qdev->dumb_shadow_bo);
-		}
-		if (user_bo->shadow != qdev->dumb_shadow_bo) {
-			if (user_bo->shadow) {
-				qxl_bo_unpin(user_bo->shadow);
-				drm_gem_object_put
-					(&user_bo->shadow->tbo.base);
-				user_bo->shadow = NULL;
-			}
-			drm_gem_object_get(&qdev->dumb_shadow_bo->tbo.base);
-			user_bo->shadow = qdev->dumb_shadow_bo;
-			qxl_bo_pin(user_bo->shadow);
-		}
+		qxl_prepare_shadow(qdev, user_bo, new_state->crtc->index);
 	}
 
 	return qxl_bo_pin(user_bo);
-- 
2.29.2

[PATCH v2 10/11] drm/qxl: rework cursor plane

[Gerd Hoffmann]

Add helper functions to create and move the cursor.
Create the cursor_bo in prepare_fb callback, in the
atomic_commit callback we only send the update command
to the host.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 drivers/gpu/drm/qxl/qxl_display.c | 248 ++++++++++++++++--------------
 1 file changed, 133 insertions(+), 115 deletions(-)

diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c
index b315d7484e21..4a3d272e8d6c 100644
--- a/drivers/gpu/drm/qxl/qxl_display.c
+++ b/drivers/gpu/drm/qxl/qxl_display.c
@@ -476,12 +476,11 @@ static int qxl_primary_atomic_check(struct drm_plane *plane,
 	return qxl_check_framebuffer(qdev, bo);
 }
 
-static int qxl_primary_apply_cursor(struct drm_plane *plane)
+static int qxl_primary_apply_cursor(struct qxl_device *qdev,
+				    struct drm_plane_state *plane_state)
 {
-	struct drm_device *dev = plane->dev;
-	struct qxl_device *qdev = to_qxl(dev);
-	struct drm_framebuffer *fb = plane->state->fb;
-	struct qxl_crtc *qcrtc = to_qxl_crtc(plane->state->crtc);
+	struct drm_framebuffer *fb = plane_state->fb;
+	struct qxl_crtc *qcrtc = to_qxl_crtc(plane_state->crtc);
 	struct qxl_cursor_cmd *cmd;
 	struct qxl_release *release;
 	int ret = 0;
@@ -505,8 +504,8 @@ static int qxl_primary_apply_cursor(struct drm_plane *plane)
 
 	cmd = (struct qxl_cursor_cmd *)qxl_release_map(qdev, release);
 	cmd->type = QXL_CURSOR_SET;
-	cmd->u.set.position.x = plane->state->crtc_x + fb->hot_x;
-	cmd->u.set.position.y = plane->state->crtc_y + fb->hot_y;
+	cmd->u.set.position.x = plane_state->crtc_x + fb->hot_x;
+	cmd->u.set.position.y = plane_state->crtc_y + fb->hot_y;
 
 	cmd->u.set.shape = qxl_bo_physical_address(qdev, qcrtc->cursor_bo, 0);
 
@@ -523,6 +522,113 @@ static int qxl_primary_apply_cursor(struct drm_plane *plane)
 	return ret;
 }
 
+static int qxl_primary_move_cursor(struct qxl_device *qdev,
+				   struct drm_plane_state *plane_state)
+{
+	struct drm_framebuffer *fb = plane_state->fb;
+	struct qxl_crtc *qcrtc = to_qxl_crtc(plane_state->crtc);
+	struct qxl_cursor_cmd *cmd;
+	struct qxl_release *release;
+	int ret = 0;
+
+	if (!qcrtc->cursor_bo)
+		return 0;
+
+	ret = qxl_alloc_release_reserved(qdev, sizeof(*cmd),
+					 QXL_RELEASE_CURSOR_CMD,
+					 &release, NULL);
+	if (ret)
+		return ret;
+
+	ret = qxl_release_reserve_list(release, true);
+	if (ret) {
+		qxl_release_free(qdev, release);
+		return ret;
+	}
+
+	cmd = (struct qxl_cursor_cmd *)qxl_release_map(qdev, release);
+	cmd->type = QXL_CURSOR_MOVE;
+	cmd->u.position.x = plane_state->crtc_x + fb->hot_x;
+	cmd->u.position.y = plane_state->crtc_y + fb->hot_y;
+	qxl_release_unmap(qdev, release, &cmd->release_info);
+
+	qxl_release_fence_buffer_objects(release);
+	qxl_push_cursor_ring_release(qdev, release, QXL_CMD_CURSOR, false);
+	return ret;
+}
+
+static struct qxl_bo *qxl_create_cursor(struct qxl_device *qdev,
+					struct qxl_bo *user_bo,
+					int hot_x, int hot_y)
+{
+	static const u32 size = 64 * 64 * 4;
+	struct qxl_bo *cursor_bo;
+	struct dma_buf_map cursor_map;
+	struct dma_buf_map user_map;
+	struct qxl_cursor cursor;
+	int ret;
+
+	if (!user_bo)
+		return NULL;
+
+	ret = qxl_bo_create(qdev, sizeof(struct qxl_cursor) + size,
+			    false, true, QXL_GEM_DOMAIN_VRAM, 1,
+			    NULL, &cursor_bo);
+	if (ret)
+		goto err;
+
+	ret = qxl_bo_vmap(cursor_bo, &cursor_map);
+	if (ret)
+		goto err_unref;
+
+	ret = qxl_bo_vmap(user_bo, &user_map);
+	if (ret)
+		goto err_unmap;
+
+	cursor.header.unique = 0;
+	cursor.header.type = SPICE_CURSOR_TYPE_ALPHA;
+	cursor.header.width = 64;
+	cursor.header.height = 64;
+	cursor.header.hot_spot_x = hot_x;
+	cursor.header.hot_spot_y = hot_y;
+	cursor.data_size = size;
+	cursor.chunk.next_chunk = 0;
+	cursor.chunk.prev_chunk = 0;
+	cursor.chunk.data_size = size;
+	if (cursor_map.is_iomem) {
+		memcpy_toio(cursor_map.vaddr_iomem,
+			    &cursor, sizeof(cursor));
+		memcpy_toio(cursor_map.vaddr_iomem + sizeof(cursor),
+			    user_map.vaddr, size);
+	} else {
+		memcpy(cursor_map.vaddr,
+		       &cursor, sizeof(cursor));
+		memcpy(cursor_map.vaddr + sizeof(cursor),
+		       user_map.vaddr, size);
+	}
+
+	qxl_bo_vunmap(user_bo);
+	qxl_bo_vunmap(cursor_bo);
+	return cursor_bo;
+
+err_unmap:
+	qxl_bo_vunmap(cursor_bo);
+err_unref:
+	qxl_bo_unpin(cursor_bo);
+	qxl_bo_unref(&cursor_bo);
+err:
+	return NULL;
+}
+
+static void qxl_free_cursor(struct qxl_bo *cursor_bo)
+{
+	if (!cursor_bo)
+		return;
+
+	qxl_bo_unpin(cursor_bo);
+	qxl_bo_unref(&cursor_bo);
+}
+
 static void qxl_primary_atomic_update(struct drm_plane *plane,
 				      struct drm_plane_state *old_state)
 {
@@ -543,7 +649,7 @@ static void qxl_primary_atomic_update(struct drm_plane *plane,
 		if (qdev->primary_bo)
 			qxl_io_destroy_primary(qdev);
 		qxl_io_create_primary(qdev, primary);
-		qxl_primary_apply_cursor(plane);
+		qxl_primary_apply_cursor(qdev, plane->state);
 	}
 
 	if (bo->is_dumb)
@@ -574,124 +680,21 @@ static void qxl_primary_atomic_disable(struct drm_plane *plane,
 static void qxl_cursor_atomic_update(struct drm_plane *plane,
 				     struct drm_plane_state *old_state)
 {
-	struct drm_device *dev = plane->dev;
-	struct qxl_device *qdev = to_qxl(dev);
+	struct qxl_device *qdev = to_qxl(plane->dev);
 	struct drm_framebuffer *fb = plane->state->fb;
-	struct qxl_crtc *qcrtc = to_qxl_crtc(plane->state->crtc);
-	struct qxl_release *release;
-	struct qxl_cursor_cmd *cmd;
-	struct qxl_cursor *cursor;
-	struct drm_gem_object *obj;
-	struct qxl_bo *cursor_bo = NULL, *user_bo = NULL, *old_cursor_bo = NULL;
-	int ret;
-	struct dma_buf_map user_map;
-	struct dma_buf_map cursor_map;
-	void *user_ptr;
-	int size = 64*64*4;
-
-	ret = qxl_alloc_release_reserved(qdev, sizeof(*cmd),
-					 QXL_RELEASE_CURSOR_CMD,
-					 &release, NULL);
-	if (ret)
-		return;
 
 	if (fb != old_state->fb) {
-		obj = fb->obj[0];
-		user_bo = gem_to_qxl_bo(obj);
-
-		/* pinning is done in the prepare/cleanup framevbuffer */
-		ret = qxl_bo_vmap_locked(user_bo, &user_map);
-		if (ret)
-			goto out_free_release;
-		user_ptr = user_map.vaddr; /* TODO: Use mapping abstraction properly */
-
-		ret = qxl_alloc_bo_reserved(qdev, release,
-					    sizeof(struct qxl_cursor) + size,
-					    &cursor_bo);
-		if (ret)
-			goto out_kunmap;
-
-		ret = qxl_bo_pin(cursor_bo);
-		if (ret)
-			goto out_free_bo;
-
-		ret = qxl_release_reserve_list(release, true);
-		if (ret)
-			goto out_unpin;
-
-		ret = qxl_bo_vmap_locked(cursor_bo, &cursor_map);
-		if (ret)
-			goto out_backoff;
-		if (cursor_map.is_iomem) /* TODO: Use mapping abstraction properly */
-			cursor = (struct qxl_cursor __force *)cursor_map.vaddr_iomem;
-		else
-			cursor = (struct qxl_cursor *)cursor_map.vaddr;
-
-		cursor->header.unique = 0;
-		cursor->header.type = SPICE_CURSOR_TYPE_ALPHA;
-		cursor->header.width = 64;
-		cursor->header.height = 64;
-		cursor->header.hot_spot_x = fb->hot_x;
-		cursor->header.hot_spot_y = fb->hot_y;
-		cursor->data_size = size;
-		cursor->chunk.next_chunk = 0;
-		cursor->chunk.prev_chunk = 0;
-		cursor->chunk.data_size = size;
-		memcpy(cursor->chunk.data, user_ptr, size);
-		qxl_bo_vunmap_locked(cursor_bo);
-		qxl_bo_vunmap_locked(user_bo);
-
-		cmd = (struct qxl_cursor_cmd *) qxl_release_map(qdev, release);
-		cmd->u.set.visible = 1;
-		cmd->u.set.shape = qxl_bo_physical_address(qdev,
-							   cursor_bo, 0);
-		cmd->type = QXL_CURSOR_SET;
-
-		old_cursor_bo = qcrtc->cursor_bo;
-		qcrtc->cursor_bo = cursor_bo;
-		cursor_bo = NULL;
+		qxl_primary_apply_cursor(qdev, plane->state);
 	} else {
-
-		ret = qxl_release_reserve_list(release, true);
-		if (ret)
-			goto out_free_release;
-
-		cmd = (struct qxl_cursor_cmd *) qxl_release_map(qdev, release);
-		cmd->type = QXL_CURSOR_MOVE;
+		qxl_primary_move_cursor(qdev, plane->state);
 	}
-
-	cmd->u.position.x = plane->state->crtc_x + fb->hot_x;
-	cmd->u.position.y = plane->state->crtc_y + fb->hot_y;
-
-	qxl_release_unmap(qdev, release, &cmd->release_info);
-	qxl_release_fence_buffer_objects(release);
-	qxl_push_cursor_ring_release(qdev, release, QXL_CMD_CURSOR, false);
-
-	if (old_cursor_bo != NULL)
-		qxl_bo_unpin(old_cursor_bo);
-	qxl_bo_unref(&old_cursor_bo);
-	qxl_bo_unref(&cursor_bo);
-
-	return;
-
-out_backoff:
-	qxl_release_backoff_reserve_list(release);
-out_unpin:
-	qxl_bo_unpin(cursor_bo);
-out_free_bo:
-	qxl_bo_unref(&cursor_bo);
-out_kunmap:
-	qxl_bo_vunmap_locked(user_bo);
-out_free_release:
-	qxl_release_free(qdev, release);
-	return;
-
 }
 
 static void qxl_cursor_atomic_disable(struct drm_plane *plane,
 				      struct drm_plane_state *old_state)
 {
 	struct qxl_device *qdev = to_qxl(plane->dev);
+	struct qxl_crtc *qcrtc;
 	struct qxl_release *release;
 	struct qxl_cursor_cmd *cmd;
 	int ret;
@@ -714,6 +717,10 @@ static void qxl_cursor_atomic_disable(struct drm_plane *plane,
 
 	qxl_release_fence_buffer_objects(release);
 	qxl_push_cursor_ring_release(qdev, release, QXL_CMD_CURSOR, false);
+
+	qcrtc = to_qxl_crtc(old_state->crtc);
+	qxl_free_cursor(qcrtc->cursor_bo);
+	qcrtc->cursor_bo = NULL;
 }
 
 static void qxl_update_dumb_head(struct qxl_device *qdev,
@@ -822,6 +829,17 @@ static int qxl_plane_prepare_fb(struct drm_plane *plane,
 		qxl_prepare_shadow(qdev, user_bo, new_state->crtc->index);
 	}
 
+	if (plane->type == DRM_PLANE_TYPE_CURSOR &&
+	    plane->state->fb != new_state->fb) {
+		struct qxl_crtc *qcrtc = to_qxl_crtc(new_state->crtc);
+		struct qxl_bo *old_cursor_bo = qcrtc->cursor_bo;
+
+		qcrtc->cursor_bo = qxl_create_cursor(qdev, user_bo,
+						     new_state->fb->hot_x,
+						     new_state->fb->hot_y);
+		qxl_free_cursor(old_cursor_bo);
+	}
+
 	return qxl_bo_pin(user_bo);
 }
 
-- 
2.29.2

Re: [PATCH v2 10/11] drm/qxl: rework cursor plane

[Thomas Zimmermann]

[-- Attachment #1.1: Type: text/plain, Size: 11863 bytes --]

Hi

Am 17.02.21 um 13:32 schrieb Gerd Hoffmann:
> Add helper functions to create and move the cursor.
> Create the cursor_bo in prepare_fb callback, in the
> atomic_commit callback we only send the update command
> to the host.

I'm still trying to wrap my head around the qxl cursor code.

Getting vmap out of the commit tail is good, but I feel like this isn't 
going in the right direction overall.

In ast, these helper functions were only good when converting the drvier 
to atomic modesetting. So I removed them in the latst patchset and did 
all the updates in the plane helpers directly.

For cursor_bo itself, it seems to be transitional state that is only 
used during the plane update and crtc update . It should probably be 
stored in a plane-state structure.

Some of the primary plane's functions seem to deal with cursor handling. 
What's the role of the primary plane in cursor handling?

For now, I suggest to merge patch 1 to 8 and 11; and move the cursor 
patches into a new patchset. I'd like ot hear Daniel's opinion on this. 
Do you have further plans here?

If you absolutely want patches 9 and 10, I'd rubber-stamp an A-b on them.

Best regards
Thomas

> 
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
> ---
>   drivers/gpu/drm/qxl/qxl_display.c | 248 ++++++++++++++++--------------
>   1 file changed, 133 insertions(+), 115 deletions(-)
> 
> diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c
> index b315d7484e21..4a3d272e8d6c 100644
> --- a/drivers/gpu/drm/qxl/qxl_display.c
> +++ b/drivers/gpu/drm/qxl/qxl_display.c
> @@ -476,12 +476,11 @@ static int qxl_primary_atomic_check(struct drm_plane *plane,
>   	return qxl_check_framebuffer(qdev, bo);
>   }
>   
> -static int qxl_primary_apply_cursor(struct drm_plane *plane)
> +static int qxl_primary_apply_cursor(struct qxl_device *qdev,
> +				    struct drm_plane_state *plane_state)
>   {
> -	struct drm_device *dev = plane->dev;
> -	struct qxl_device *qdev = to_qxl(dev);
> -	struct drm_framebuffer *fb = plane->state->fb;
> -	struct qxl_crtc *qcrtc = to_qxl_crtc(plane->state->crtc);
> +	struct drm_framebuffer *fb = plane_state->fb;
> +	struct qxl_crtc *qcrtc = to_qxl_crtc(plane_state->crtc);
>   	struct qxl_cursor_cmd *cmd;
>   	struct qxl_release *release;
>   	int ret = 0;
> @@ -505,8 +504,8 @@ static int qxl_primary_apply_cursor(struct drm_plane *plane)
>   
>   	cmd = (struct qxl_cursor_cmd *)qxl_release_map(qdev, release);
>   	cmd->type = QXL_CURSOR_SET;
> -	cmd->u.set.position.x = plane->state->crtc_x + fb->hot_x;
> -	cmd->u.set.position.y = plane->state->crtc_y + fb->hot_y;
> +	cmd->u.set.position.x = plane_state->crtc_x + fb->hot_x;
> +	cmd->u.set.position.y = plane_state->crtc_y + fb->hot_y;
>   
>   	cmd->u.set.shape = qxl_bo_physical_address(qdev, qcrtc->cursor_bo, 0);
>   
> @@ -523,6 +522,113 @@ static int qxl_primary_apply_cursor(struct drm_plane *plane)
>   	return ret;
>   }
>   
> +static int qxl_primary_move_cursor(struct qxl_device *qdev,
> +				   struct drm_plane_state *plane_state)
> +{
> +	struct drm_framebuffer *fb = plane_state->fb;
> +	struct qxl_crtc *qcrtc = to_qxl_crtc(plane_state->crtc);
> +	struct qxl_cursor_cmd *cmd;
> +	struct qxl_release *release;
> +	int ret = 0;
> +
> +	if (!qcrtc->cursor_bo)
> +		return 0;
> +
> +	ret = qxl_alloc_release_reserved(qdev, sizeof(*cmd),
> +					 QXL_RELEASE_CURSOR_CMD,
> +					 &release, NULL);
> +	if (ret)
> +		return ret;
> +
> +	ret = qxl_release_reserve_list(release, true);
> +	if (ret) {
> +		qxl_release_free(qdev, release);
> +		return ret;
> +	}
> +
> +	cmd = (struct qxl_cursor_cmd *)qxl_release_map(qdev, release);
> +	cmd->type = QXL_CURSOR_MOVE;
> +	cmd->u.position.x = plane_state->crtc_x + fb->hot_x;
> +	cmd->u.position.y = plane_state->crtc_y + fb->hot_y;
> +	qxl_release_unmap(qdev, release, &cmd->release_info);
> +
> +	qxl_release_fence_buffer_objects(release);
> +	qxl_push_cursor_ring_release(qdev, release, QXL_CMD_CURSOR, false);
> +	return ret;
> +}
> +
> +static struct qxl_bo *qxl_create_cursor(struct qxl_device *qdev,
> +					struct qxl_bo *user_bo,
> +					int hot_x, int hot_y)
> +{
> +	static const u32 size = 64 * 64 * 4;
> +	struct qxl_bo *cursor_bo;
> +	struct dma_buf_map cursor_map;
> +	struct dma_buf_map user_map;
> +	struct qxl_cursor cursor;
> +	int ret;
> +
> +	if (!user_bo)
> +		return NULL;
> +
> +	ret = qxl_bo_create(qdev, sizeof(struct qxl_cursor) + size,
> +			    false, true, QXL_GEM_DOMAIN_VRAM, 1,
> +			    NULL, &cursor_bo);
> +	if (ret)
> +		goto err;
> +
> +	ret = qxl_bo_vmap(cursor_bo, &cursor_map);
> +	if (ret)
> +		goto err_unref;
> +
> +	ret = qxl_bo_vmap(user_bo, &user_map);
> +	if (ret)
> +		goto err_unmap;
> +
> +	cursor.header.unique = 0;
> +	cursor.header.type = SPICE_CURSOR_TYPE_ALPHA;
> +	cursor.header.width = 64;
> +	cursor.header.height = 64;
> +	cursor.header.hot_spot_x = hot_x;
> +	cursor.header.hot_spot_y = hot_y;
> +	cursor.data_size = size;
> +	cursor.chunk.next_chunk = 0;
> +	cursor.chunk.prev_chunk = 0;
> +	cursor.chunk.data_size = size;
> +	if (cursor_map.is_iomem) {
> +		memcpy_toio(cursor_map.vaddr_iomem,
> +			    &cursor, sizeof(cursor));
> +		memcpy_toio(cursor_map.vaddr_iomem + sizeof(cursor),
> +			    user_map.vaddr, size);
> +	} else {
> +		memcpy(cursor_map.vaddr,
> +		       &cursor, sizeof(cursor));
> +		memcpy(cursor_map.vaddr + sizeof(cursor),
> +		       user_map.vaddr, size);
> +	}
> +
> +	qxl_bo_vunmap(user_bo);
> +	qxl_bo_vunmap(cursor_bo);
> +	return cursor_bo;
> +
> +err_unmap:
> +	qxl_bo_vunmap(cursor_bo);
> +err_unref:
> +	qxl_bo_unpin(cursor_bo);
> +	qxl_bo_unref(&cursor_bo);
> +err:
> +	return NULL;
> +}
> +
> +static void qxl_free_cursor(struct qxl_bo *cursor_bo)
> +{
> +	if (!cursor_bo)
> +		return;
> +
> +	qxl_bo_unpin(cursor_bo);
> +	qxl_bo_unref(&cursor_bo);
> +}
> +
>   static void qxl_primary_atomic_update(struct drm_plane *plane,
>   				      struct drm_plane_state *old_state)
>   {
> @@ -543,7 +649,7 @@ static void qxl_primary_atomic_update(struct drm_plane *plane,
>   		if (qdev->primary_bo)
>   			qxl_io_destroy_primary(qdev);
>   		qxl_io_create_primary(qdev, primary);
> -		qxl_primary_apply_cursor(plane);
> +		qxl_primary_apply_cursor(qdev, plane->state);
>   	}
>   
>   	if (bo->is_dumb)
> @@ -574,124 +680,21 @@ static void qxl_primary_atomic_disable(struct drm_plane *plane,
>   static void qxl_cursor_atomic_update(struct drm_plane *plane,
>   				     struct drm_plane_state *old_state)
>   {
> -	struct drm_device *dev = plane->dev;
> -	struct qxl_device *qdev = to_qxl(dev);
> +	struct qxl_device *qdev = to_qxl(plane->dev);
>   	struct drm_framebuffer *fb = plane->state->fb;
> -	struct qxl_crtc *qcrtc = to_qxl_crtc(plane->state->crtc);
> -	struct qxl_release *release;
> -	struct qxl_cursor_cmd *cmd;
> -	struct qxl_cursor *cursor;
> -	struct drm_gem_object *obj;
> -	struct qxl_bo *cursor_bo = NULL, *user_bo = NULL, *old_cursor_bo = NULL;
> -	int ret;
> -	struct dma_buf_map user_map;
> -	struct dma_buf_map cursor_map;
> -	void *user_ptr;
> -	int size = 64*64*4;
> -
> -	ret = qxl_alloc_release_reserved(qdev, sizeof(*cmd),
> -					 QXL_RELEASE_CURSOR_CMD,
> -					 &release, NULL);
> -	if (ret)
> -		return;
>   
>   	if (fb != old_state->fb) {
> -		obj = fb->obj[0];
> -		user_bo = gem_to_qxl_bo(obj);
> -
> -		/* pinning is done in the prepare/cleanup framevbuffer */
> -		ret = qxl_bo_vmap_locked(user_bo, &user_map);
> -		if (ret)
> -			goto out_free_release;
> -		user_ptr = user_map.vaddr; /* TODO: Use mapping abstraction properly */
> -
> -		ret = qxl_alloc_bo_reserved(qdev, release,
> -					    sizeof(struct qxl_cursor) + size,
> -					    &cursor_bo);
> -		if (ret)
> -			goto out_kunmap;
> -
> -		ret = qxl_bo_pin(cursor_bo);
> -		if (ret)
> -			goto out_free_bo;
> -
> -		ret = qxl_release_reserve_list(release, true);
> -		if (ret)
> -			goto out_unpin;
> -
> -		ret = qxl_bo_vmap_locked(cursor_bo, &cursor_map);
> -		if (ret)
> -			goto out_backoff;
> -		if (cursor_map.is_iomem) /* TODO: Use mapping abstraction properly */
> -			cursor = (struct qxl_cursor __force *)cursor_map.vaddr_iomem;
> -		else
> -			cursor = (struct qxl_cursor *)cursor_map.vaddr;
> -
> -		cursor->header.unique = 0;
> -		cursor->header.type = SPICE_CURSOR_TYPE_ALPHA;
> -		cursor->header.width = 64;
> -		cursor->header.height = 64;
> -		cursor->header.hot_spot_x = fb->hot_x;
> -		cursor->header.hot_spot_y = fb->hot_y;
> -		cursor->data_size = size;
> -		cursor->chunk.next_chunk = 0;
> -		cursor->chunk.prev_chunk = 0;
> -		cursor->chunk.data_size = size;
> -		memcpy(cursor->chunk.data, user_ptr, size);
> -		qxl_bo_vunmap_locked(cursor_bo);
> -		qxl_bo_vunmap_locked(user_bo);
> -
> -		cmd = (struct qxl_cursor_cmd *) qxl_release_map(qdev, release);
> -		cmd->u.set.visible = 1;
> -		cmd->u.set.shape = qxl_bo_physical_address(qdev,
> -							   cursor_bo, 0);
> -		cmd->type = QXL_CURSOR_SET;
> -
> -		old_cursor_bo = qcrtc->cursor_bo;
> -		qcrtc->cursor_bo = cursor_bo;
> -		cursor_bo = NULL;
> +		qxl_primary_apply_cursor(qdev, plane->state);
>   	} else {
> -
> -		ret = qxl_release_reserve_list(release, true);
> -		if (ret)
> -			goto out_free_release;
> -
> -		cmd = (struct qxl_cursor_cmd *) qxl_release_map(qdev, release);
> -		cmd->type = QXL_CURSOR_MOVE;
> +		qxl_primary_move_cursor(qdev, plane->state);
>   	}
> -
> -	cmd->u.position.x = plane->state->crtc_x + fb->hot_x;
> -	cmd->u.position.y = plane->state->crtc_y + fb->hot_y;
> -
> -	qxl_release_unmap(qdev, release, &cmd->release_info);
> -	qxl_release_fence_buffer_objects(release);
> -	qxl_push_cursor_ring_release(qdev, release, QXL_CMD_CURSOR, false);
> -
> -	if (old_cursor_bo != NULL)
> -		qxl_bo_unpin(old_cursor_bo);
> -	qxl_bo_unref(&old_cursor_bo);
> -	qxl_bo_unref(&cursor_bo);
> -
> -	return;
> -
> -out_backoff:
> -	qxl_release_backoff_reserve_list(release);
> -out_unpin:
> -	qxl_bo_unpin(cursor_bo);
> -out_free_bo:
> -	qxl_bo_unref(&cursor_bo);
> -out_kunmap:
> -	qxl_bo_vunmap_locked(user_bo);
> -out_free_release:
> -	qxl_release_free(qdev, release);
> -	return;
> -
>   }
>   
>   static void qxl_cursor_atomic_disable(struct drm_plane *plane,
>   				      struct drm_plane_state *old_state)
>   {
>   	struct qxl_device *qdev = to_qxl(plane->dev);
> +	struct qxl_crtc *qcrtc;
>   	struct qxl_release *release;
>   	struct qxl_cursor_cmd *cmd;
>   	int ret;
> @@ -714,6 +717,10 @@ static void qxl_cursor_atomic_disable(struct drm_plane *plane,
>   
>   	qxl_release_fence_buffer_objects(release);
>   	qxl_push_cursor_ring_release(qdev, release, QXL_CMD_CURSOR, false);
> +
> +	qcrtc = to_qxl_crtc(old_state->crtc);
> +	qxl_free_cursor(qcrtc->cursor_bo);
> +	qcrtc->cursor_bo = NULL;
>   }
>   
>   static void qxl_update_dumb_head(struct qxl_device *qdev,
> @@ -822,6 +829,17 @@ static int qxl_plane_prepare_fb(struct drm_plane *plane,
>   		qxl_prepare_shadow(qdev, user_bo, new_state->crtc->index);
>   	}
>   
> +	if (plane->type == DRM_PLANE_TYPE_CURSOR &&
> +	    plane->state->fb != new_state->fb) {
> +		struct qxl_crtc *qcrtc = to_qxl_crtc(new_state->crtc);
> +		struct qxl_bo *old_cursor_bo = qcrtc->cursor_bo;
> +
> +		qcrtc->cursor_bo = qxl_create_cursor(qdev, user_bo,
> +						     new_state->fb->hot_x,
> +						     new_state->fb->hot_y);
> +		qxl_free_cursor(old_cursor_bo);
> +	}
> +
>   	return qxl_bo_pin(user_bo);
>   }
>   
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer


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Re: [PATCH v2 10/11] drm/qxl: rework cursor plane

[Gerd Hoffmann]

  Hi,

> I'm still trying to wrap my head around the qxl cursor code.
> 
> Getting vmap out of the commit tail is good, but I feel like this isn't
> going in the right direction overall.
> 
> In ast, these helper functions were only good when converting the drvier to
> atomic modesetting. So I removed them in the latst patchset and did all the
> updates in the plane helpers directly.

I see the helper functions more as a way to get some structure into the
code flow.  The callbacks are easier to read if they just call helper
functions for stuff which needs more than a handful lines of code
(patch 9/11 exists for the same reason).

The helpers also make it easier move work from one callback to another,
but that is just a useful side-effect.

I had considered making that two separate patches, one factor out code
into functions and one moving the calls.  Turned out to not be that easy
though, because the old qxl_cursor_atomic_update() code was a rather
hairy mix of qxl_create_cursor() + qxl_primary_apply_cursor() +
qxl_primary_move_cursor().

> For cursor_bo itself, it seems to be transitional state that is only used
> during the plane update and crtc update . It should probably be stored in a
> plane-state structure.
> 
> Some of the primary plane's functions seem to deal with cursor handling.
> What's the role of the primary plane in cursor handling?

It's a quirk.  The qxl device will forget the cursor state on
qxl_io_create_primary(), so I have to remember the cursor state
and re-establish it by calling qxl_primary_apply_cursor() again.

So I'm not sure sticking this into plane state would work.  Because of
the quirk this is more than just a handover from prepare to commit.

> For now, I suggest to merge patch 1 to 8 and 11; and move the cursor patches
> into a new patchset.

I can merge 1-8, but 11 has to wait until the cursor is sorted.
There is a reason why 11 is last in the series ;)

> I'd like ot hear Daniel's opinion on this. Do you have
> further plans here?

Well.  I suspect I could easily spend a month cleaning up and party
redesign the qxl driver (specifically qxl_draw.c + qxl_image.c).

I'm not sure I'll find the time to actually do that anytime soon.
I have plenty of other stuff on my TODO list, and given that the
world is transitioning to virtio-gpu the priority for qxl isn't
that high.

So, no, I have no short-term plans for qxl beyond fixing pins +
reservations + lockdep.

take care,
  Gerd

Re: [PATCH v2 10/11] drm/qxl: rework cursor plane

[Thomas Zimmermann]

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Hi

Am 18.02.21 um 12:50 schrieb Gerd Hoffmann:
>    Hi,
> 
>> I'm still trying to wrap my head around the qxl cursor code.
>>
>> Getting vmap out of the commit tail is good, but I feel like this isn't
>> going in the right direction overall.
>>
>> In ast, these helper functions were only good when converting the drvier to
>> atomic modesetting. So I removed them in the latst patchset and did all the
>> updates in the plane helpers directly.
> 
> I see the helper functions more as a way to get some structure into the
> code flow.  The callbacks are easier to read if they just call helper
> functions for stuff which needs more than a handful lines of code
> (patch 9/11 exists for the same reason).
> 
> The helpers also make it easier move work from one callback to another,
> but that is just a useful side-effect.
> 
> I had considered making that two separate patches, one factor out code
> into functions and one moving the calls.  Turned out to not be that easy
> though, because the old qxl_cursor_atomic_update() code was a rather
> hairy mix of qxl_create_cursor() + qxl_primary_apply_cursor() +
> qxl_primary_move_cursor().
> 
>> For cursor_bo itself, it seems to be transitional state that is only used
>> during the plane update and crtc update . It should probably be stored in a
>> plane-state structure.
>>
>> Some of the primary plane's functions seem to deal with cursor handling.
>> What's the role of the primary plane in cursor handling?
> 
> It's a quirk.  The qxl device will forget the cursor state on
> qxl_io_create_primary(), so I have to remember the cursor state
> and re-establish it by calling qxl_primary_apply_cursor() again.
> 
> So I'm not sure sticking this into plane state would work.  Because of
> the quirk this is more than just a handover from prepare to commit.
> 
>> For now, I suggest to merge patch 1 to 8 and 11; and move the cursor patches
>> into a new patchset.
> 
> I can merge 1-8, but 11 has to wait until the cursor is sorted.
> There is a reason why 11 is last in the series ;)
> 
>> I'd like ot hear Daniel's opinion on this. Do you have
>> further plans here?
> 
> Well.  I suspect I could easily spend a month cleaning up and party
> redesign the qxl driver (specifically qxl_draw.c + qxl_image.c).
> 
> I'm not sure I'll find the time to actually do that anytime soon.
> I have plenty of other stuff on my TODO list, and given that the
> world is transitioning to virtio-gpu the priority for qxl isn't
> that high.

Well, in that case:

Acked-by: Thomas Zimmermann <tzimmermann@suse.de>

for patches 9 and 10. Having the vmap calls fixed is at least worth it.

Best regards
Thomas

> 
> So, no, I have no short-term plans for qxl beyond fixing pins +
> reservations + lockdep.
> 
> take care,
>    Gerd
> 
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer


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Re: [PATCH v2 10/11] drm/qxl: rework cursor plane

[Gerd Hoffmann]

  Hi,

> > Well.  I suspect I could easily spend a month cleaning up and party
> > redesign the qxl driver (specifically qxl_draw.c + qxl_image.c).
> > 
> > I'm not sure I'll find the time to actually do that anytime soon.
> > I have plenty of other stuff on my TODO list, and given that the
> > world is transitioning to virtio-gpu the priority for qxl isn't
> > that high.
> 
> Well, in that case:
> 
> Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
> 
> for patches 9 and 10. Having the vmap calls fixed is at least worth it.

Thanks.  Any chance you can ack 8/11 too (only patch missing an ack).

take care,
  Gerd

[PATCH v2 11/11] drm/qxl: add lock asserts to qxl_bo_vmap_locked + qxl_bo_vunmap_locked

[Gerd Hoffmann]

Try avoid re-introducing locking bugs.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/qxl/qxl_object.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/qxl/qxl_object.c b/drivers/gpu/drm/qxl/qxl_object.c
index 82c3bf195ad6..6e26d70f2f07 100644
--- a/drivers/gpu/drm/qxl/qxl_object.c
+++ b/drivers/gpu/drm/qxl/qxl_object.c
@@ -162,6 +162,8 @@ int qxl_bo_vmap_locked(struct qxl_bo *bo, struct dma_buf_map *map)
 {
 	int r;
 
+	dma_resv_assert_held(bo->tbo.base.resv);
+
 	if (bo->kptr) {
 		bo->map_count++;
 		goto out;
@@ -236,6 +238,8 @@ void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev,
 
 void qxl_bo_vunmap_locked(struct qxl_bo *bo)
 {
+	dma_resv_assert_held(bo->tbo.base.resv);
+
 	if (bo->kptr == NULL)
 		return;
 	bo->map_count--;
-- 
2.29.2