From 9999e48639b3cecb08ffb37358bcba3b48161b29 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 08:50:17 +0000
Subject: [PATCH] add ax88772_rst
---
kernel/drivers/gpu/drm/virtio/virtgpu_object.c | 331 ++++++++++++++++++++++++++++--------------------------
1 files changed, 173 insertions(+), 158 deletions(-)
diff --git a/kernel/drivers/gpu/drm/virtio/virtgpu_object.c b/kernel/drivers/gpu/drm/virtio/virtgpu_object.c
index 44a787f..49fa59e 100644
--- a/kernel/drivers/gpu/drm/virtio/virtgpu_object.c
+++ b/kernel/drivers/gpu/drm/virtio/virtgpu_object.c
@@ -23,9 +23,8 @@
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
+#include <linux/dma-mapping.h>
#include <linux/moduleparam.h>
-
-#include <drm/ttm/ttm_execbuf_util.h>
#include "virtgpu_drv.h"
@@ -63,37 +62,141 @@
}
}
-static void virtio_gpu_ttm_bo_destroy(struct ttm_buffer_object *tbo)
+void virtio_gpu_cleanup_object(struct virtio_gpu_object *bo)
{
- struct virtio_gpu_object *bo;
- struct virtio_gpu_device *vgdev;
+ struct virtio_gpu_device *vgdev = bo->base.base.dev->dev_private;
- bo = container_of(tbo, struct virtio_gpu_object, tbo);
- vgdev = (struct virtio_gpu_device *)bo->gem_base.dev->dev_private;
-
- if (bo->created)
- virtio_gpu_cmd_unref_resource(vgdev, bo->hw_res_handle);
- if (bo->pages)
- virtio_gpu_object_free_sg_table(bo);
- drm_gem_object_release(&bo->gem_base);
virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle);
- kfree(bo);
+ if (virtio_gpu_is_shmem(bo)) {
+ struct virtio_gpu_object_shmem *shmem = to_virtio_gpu_shmem(bo);
+
+ if (shmem->pages) {
+ if (shmem->mapped) {
+ dma_unmap_sgtable(vgdev->vdev->dev.parent,
+ shmem->pages, DMA_TO_DEVICE, 0);
+ shmem->mapped = 0;
+ }
+
+ sg_free_table(shmem->pages);
+ kfree(shmem->pages);
+ shmem->pages = NULL;
+ drm_gem_shmem_unpin(&bo->base.base);
+ }
+
+ drm_gem_shmem_free_object(&bo->base.base);
+ }
}
-static void virtio_gpu_init_ttm_placement(struct virtio_gpu_object *vgbo)
+static void virtio_gpu_free_object(struct drm_gem_object *obj)
{
- u32 c = 1;
+ struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj);
+ struct virtio_gpu_device *vgdev = bo->base.base.dev->dev_private;
- vgbo->placement.placement = &vgbo->placement_code;
- vgbo->placement.busy_placement = &vgbo->placement_code;
- vgbo->placement_code.fpfn = 0;
- vgbo->placement_code.lpfn = 0;
- vgbo->placement_code.flags =
- TTM_PL_MASK_CACHING | TTM_PL_FLAG_TT |
- TTM_PL_FLAG_NO_EVICT;
- vgbo->placement.num_placement = c;
- vgbo->placement.num_busy_placement = c;
+ if (bo->created) {
+ virtio_gpu_cmd_unref_resource(vgdev, bo);
+ virtio_gpu_notify(vgdev);
+ /* completion handler calls virtio_gpu_cleanup_object() */
+ return;
+ }
+ virtio_gpu_cleanup_object(bo);
+}
+static const struct drm_gem_object_funcs virtio_gpu_shmem_funcs = {
+ .free = virtio_gpu_free_object,
+ .open = virtio_gpu_gem_object_open,
+ .close = virtio_gpu_gem_object_close,
+
+ .print_info = drm_gem_shmem_print_info,
+ .pin = drm_gem_shmem_pin,
+ .unpin = drm_gem_shmem_unpin,
+ .get_sg_table = drm_gem_shmem_get_sg_table,
+ .vmap = drm_gem_shmem_vmap,
+ .vunmap = drm_gem_shmem_vunmap,
+ .mmap = drm_gem_shmem_mmap,
+};
+
+bool virtio_gpu_is_shmem(struct virtio_gpu_object *bo)
+{
+ return bo->base.base.funcs == &virtio_gpu_shmem_funcs;
+}
+
+struct drm_gem_object *virtio_gpu_create_object(struct drm_device *dev,
+ size_t size)
+{
+ struct virtio_gpu_object_shmem *shmem;
+ struct drm_gem_shmem_object *dshmem;
+
+ shmem = kzalloc(sizeof(*shmem), GFP_KERNEL);
+ if (!shmem)
+ return NULL;
+
+ dshmem = &shmem->base.base;
+ dshmem->base.funcs = &virtio_gpu_shmem_funcs;
+ dshmem->map_cached = true;
+ return &dshmem->base;
+}
+
+static int virtio_gpu_object_shmem_init(struct virtio_gpu_device *vgdev,
+ struct virtio_gpu_object *bo,
+ struct virtio_gpu_mem_entry **ents,
+ unsigned int *nents)
+{
+ bool use_dma_api = !virtio_has_dma_quirk(vgdev->vdev);
+ struct virtio_gpu_object_shmem *shmem = to_virtio_gpu_shmem(bo);
+ struct scatterlist *sg;
+ int si, ret;
+
+ ret = drm_gem_shmem_pin(&bo->base.base);
+ if (ret < 0)
+ return -EINVAL;
+
+ /*
+ * virtio_gpu uses drm_gem_shmem_get_sg_table instead of
+ * drm_gem_shmem_get_pages_sgt because virtio has it's own set of
+ * dma-ops. This is discouraged for other drivers, but should be fine
+ * since virtio_gpu doesn't support dma-buf import from other devices.
+ */
+ shmem->pages = drm_gem_shmem_get_sg_table(&bo->base.base);
+ if (IS_ERR(shmem->pages)) {
+ drm_gem_shmem_unpin(&bo->base.base);
+ ret = PTR_ERR(shmem->pages);
+ shmem->pages = NULL;
+ return ret;
+ }
+
+ if (use_dma_api) {
+ ret = dma_map_sgtable(vgdev->vdev->dev.parent,
+ shmem->pages, DMA_TO_DEVICE, 0);
+ if (ret)
+ return ret;
+ *nents = shmem->mapped = shmem->pages->nents;
+ } else {
+ *nents = shmem->pages->orig_nents;
+ }
+
+ *ents = kvmalloc_array(*nents,
+ sizeof(struct virtio_gpu_mem_entry),
+ GFP_KERNEL);
+ if (!(*ents)) {
+ DRM_ERROR("failed to allocate ent list\n");
+ return -ENOMEM;
+ }
+
+ if (use_dma_api) {
+ for_each_sgtable_dma_sg(shmem->pages, sg, si) {
+ (*ents)[si].addr = cpu_to_le64(sg_dma_address(sg));
+ (*ents)[si].length = cpu_to_le32(sg_dma_len(sg));
+ (*ents)[si].padding = 0;
+ }
+ } else {
+ for_each_sgtable_sg(shmem->pages, sg, si) {
+ (*ents)[si].addr = cpu_to_le64(sg_phys(sg));
+ (*ents)[si].length = cpu_to_le32(sg->length);
+ (*ents)[si].padding = 0;
+ }
+ }
+
+ return 0;
}
int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
@@ -101,151 +204,63 @@
struct virtio_gpu_object **bo_ptr,
struct virtio_gpu_fence *fence)
{
+ struct virtio_gpu_object_array *objs = NULL;
+ struct drm_gem_shmem_object *shmem_obj;
struct virtio_gpu_object *bo;
- size_t acc_size;
+ struct virtio_gpu_mem_entry *ents;
+ unsigned int nents;
int ret;
*bo_ptr = NULL;
- acc_size = ttm_bo_dma_acc_size(&vgdev->mman.bdev, params->size,
- sizeof(struct virtio_gpu_object));
-
- bo = kzalloc(sizeof(struct virtio_gpu_object), GFP_KERNEL);
- if (bo == NULL)
- return -ENOMEM;
- ret = virtio_gpu_resource_id_get(vgdev, &bo->hw_res_handle);
- if (ret < 0) {
- kfree(bo);
- return ret;
- }
params->size = roundup(params->size, PAGE_SIZE);
- ret = drm_gem_object_init(vgdev->ddev, &bo->gem_base, params->size);
- if (ret != 0) {
- virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle);
- kfree(bo);
- return ret;
- }
+ shmem_obj = drm_gem_shmem_create(vgdev->ddev, params->size);
+ if (IS_ERR(shmem_obj))
+ return PTR_ERR(shmem_obj);
+ bo = gem_to_virtio_gpu_obj(&shmem_obj->base);
+
+ ret = virtio_gpu_resource_id_get(vgdev, &bo->hw_res_handle);
+ if (ret < 0)
+ goto err_free_gem;
+
bo->dumb = params->dumb;
- if (params->virgl) {
- virtio_gpu_cmd_resource_create_3d(vgdev, bo, params, fence);
- } else {
- virtio_gpu_cmd_create_resource(vgdev, bo, params, fence);
- }
-
- virtio_gpu_init_ttm_placement(bo);
- ret = ttm_bo_init(&vgdev->mman.bdev, &bo->tbo, params->size,
- ttm_bo_type_device, &bo->placement, 0,
- true, acc_size, NULL, NULL,
- &virtio_gpu_ttm_bo_destroy);
- /* ttm_bo_init failure will call the destroy */
- if (ret != 0)
- return ret;
-
if (fence) {
- struct virtio_gpu_fence_driver *drv = &vgdev->fence_drv;
- struct list_head validate_list;
- struct ttm_validate_buffer mainbuf;
- struct ww_acquire_ctx ticket;
- unsigned long irq_flags;
- bool signaled;
+ ret = -ENOMEM;
+ objs = virtio_gpu_array_alloc(1);
+ if (!objs)
+ goto err_put_id;
+ virtio_gpu_array_add_obj(objs, &bo->base.base);
- INIT_LIST_HEAD(&validate_list);
- memset(&mainbuf, 0, sizeof(struct ttm_validate_buffer));
-
- /* use a gem reference since unref list undoes them */
- drm_gem_object_get(&bo->gem_base);
- mainbuf.bo = &bo->tbo;
- list_add(&mainbuf.head, &validate_list);
-
- ret = virtio_gpu_object_list_validate(&ticket, &validate_list);
- if (ret == 0) {
- spin_lock_irqsave(&drv->lock, irq_flags);
- signaled = virtio_fence_signaled(&fence->f);
- if (!signaled)
- /* virtio create command still in flight */
- ttm_eu_fence_buffer_objects(&ticket, &validate_list,
- &fence->f);
- spin_unlock_irqrestore(&drv->lock, irq_flags);
- if (signaled)
- /* virtio create command finished */
- ttm_eu_backoff_reservation(&ticket, &validate_list);
- }
- virtio_gpu_unref_list(&validate_list);
+ ret = virtio_gpu_array_lock_resv(objs);
+ if (ret != 0)
+ goto err_put_objs;
}
+
+ if (params->virgl) {
+ virtio_gpu_cmd_resource_create_3d(vgdev, bo, params,
+ objs, fence);
+ } else {
+ virtio_gpu_cmd_create_resource(vgdev, bo, params,
+ objs, fence);
+ }
+
+ ret = virtio_gpu_object_shmem_init(vgdev, bo, &ents, &nents);
+ if (ret != 0) {
+ virtio_gpu_free_object(&shmem_obj->base);
+ return ret;
+ }
+
+ virtio_gpu_object_attach(vgdev, bo, ents, nents);
*bo_ptr = bo;
return 0;
+
+err_put_objs:
+ virtio_gpu_array_put_free(objs);
+err_put_id:
+ virtio_gpu_resource_id_put(vgdev, bo->hw_res_handle);
+err_free_gem:
+ drm_gem_shmem_free_object(&shmem_obj->base);
+ return ret;
}
-
-void virtio_gpu_object_kunmap(struct virtio_gpu_object *bo)
-{
- bo->vmap = NULL;
- ttm_bo_kunmap(&bo->kmap);
-}
-
-int virtio_gpu_object_kmap(struct virtio_gpu_object *bo)
-{
- bool is_iomem;
- int r;
-
- WARN_ON(bo->vmap);
-
- r = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, &bo->kmap);
- if (r)
- return r;
- bo->vmap = ttm_kmap_obj_virtual(&bo->kmap, &is_iomem);
- return 0;
-}
-
-int virtio_gpu_object_get_sg_table(struct virtio_gpu_device *qdev,
- struct virtio_gpu_object *bo)
-{
- int ret;
- struct page **pages = bo->tbo.ttm->pages;
- int nr_pages = bo->tbo.num_pages;
- struct ttm_operation_ctx ctx = {
- .interruptible = false,
- .no_wait_gpu = false
- };
-
- /* wtf swapping */
- if (bo->pages)
- return 0;
-
- if (bo->tbo.ttm->state == tt_unpopulated)
- bo->tbo.ttm->bdev->driver->ttm_tt_populate(bo->tbo.ttm, &ctx);
- bo->pages = kmalloc(sizeof(struct sg_table), GFP_KERNEL);
- if (!bo->pages)
- goto out;
-
- ret = sg_alloc_table_from_pages(bo->pages, pages, nr_pages, 0,
- nr_pages << PAGE_SHIFT, GFP_KERNEL);
- if (ret)
- goto out;
- return 0;
-out:
- kfree(bo->pages);
- bo->pages = NULL;
- return -ENOMEM;
-}
-
-void virtio_gpu_object_free_sg_table(struct virtio_gpu_object *bo)
-{
- sg_free_table(bo->pages);
- kfree(bo->pages);
- bo->pages = NULL;
-}
-
-int virtio_gpu_object_wait(struct virtio_gpu_object *bo, bool no_wait)
-{
- int r;
-
- r = ttm_bo_reserve(&bo->tbo, true, no_wait, NULL);
- if (unlikely(r != 0))
- return r;
- r = ttm_bo_wait(&bo->tbo, true, no_wait);
- ttm_bo_unreserve(&bo->tbo);
- return r;
-}
-
--
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