[PATCH 5.11 062/601] drm/qxl: use ttm bo priorities

Greg Kroah-Hartman
2021-05-12T16:53:25Z

From: Gerd Hoffmann <kraxel@redhat.com>

commit 4fff19ae427548d8c37260c975a4b20d3c040ec6 upstream.

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>
Link: http://patchwork.freedesktop.org/patch/msgid/20210217123213.2199186-4-kraxel@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
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_object.h | 1 +
drivers/gpu/drm/qxl/qxl_release.c | 18 ++++++++++++------
6 files changed, 20 insertions(+), 12 deletions(-)

--- a/drivers/gpu/drm/qxl/qxl_cmd.c
+++ b/drivers/gpu/drm/qxl/qxl_cmd.c
@@ -268,7 +268,7 @@ int qxl_alloc_bo_reserved(struct qxl_dev
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;
--- a/drivers/gpu/drm/qxl/qxl_display.c
+++ b/drivers/gpu/drm/qxl/qxl_display.c
@@ -798,8 +798,8 @@ static int qxl_plane_prepare_fb(struct d
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) {
--- 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_dev
/* 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(
--- 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
.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 *qde

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, size,
NULL, NULL, &qxl_ttm_bo_destroy);
--- 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(str
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);
--- a/drivers/gpu/drm/qxl/qxl_release.c
+++ b/drivers/gpu/drm/qxl/qxl_release.c
@@ -199,11 +199,12 @@ 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)
@@ -326,13 +327,18 @@ int qxl_alloc_release_reserved(struct qx
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;
@@ -352,7 +358,7 @@ int qxl_alloc_release_reserved(struct qx
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);