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drm/etnaviv: allocate unique ID per drm_file

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Allows to easily track if several fd are pointing to the same
execution context due to being dup'ed.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
This commit is contained in:
Lucas Stach 2023-02-01 16:26:08 +01:00
parent df622729dd
commit d306788b6e
2 changed files with 15 additions and 0 deletions
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11
drivers/gpu/drm/etnaviv/etnaviv_drv.c
View File

@ -56,6 +56,11 @@ static int etnaviv_open(struct drm_device *dev, struct drm_file *file)
if (!ctx)
return -ENOMEM;
ret = xa_alloc_cyclic(&priv->active_contexts, &ctx->id, ctx,
xa_limit_32b, &priv->next_context_id, GFP_KERNEL);
if (ret < 0)
goto out_free;
ctx->mmu = etnaviv_iommu_context_init(priv->mmu_global,
priv->cmdbuf_suballoc);
if (!ctx->mmu) {
@ -99,6 +104,8 @@ static void etnaviv_postclose(struct drm_device *dev, struct drm_file *file)
etnaviv_iommu_context_put(ctx->mmu);
xa_erase(&priv->active_contexts, ctx->id);
kfree(ctx);
}
@ -514,6 +521,8 @@ static int etnaviv_bind(struct device *dev)
dma_set_max_seg_size(dev, SZ_2G);
xa_init_flags(&priv->active_contexts, XA_FLAGS_ALLOC);
mutex_init(&priv->gem_lock);
INIT_LIST_HEAD(&priv->gem_list);
priv->num_gpus = 0;
@ -563,6 +572,8 @@ static void etnaviv_unbind(struct device *dev)
etnaviv_cmdbuf_suballoc_destroy(priv->cmdbuf_suballoc);
xa_destroy(&priv->active_contexts);
drm->dev_private = NULL;
kfree(priv);

4
drivers/gpu/drm/etnaviv/etnaviv_drv.h
View File

@ -29,6 +29,7 @@ struct etnaviv_iommu_global;
#define ETNAVIV_SOFTPIN_START_ADDRESS SZ_4M /* must be >= SUBALLOC_SIZE */
struct etnaviv_file_private {
int id;
struct etnaviv_iommu_context *mmu;
struct drm_sched_entity sched_entity[ETNA_MAX_PIPES];
};
@ -41,6 +42,9 @@ struct etnaviv_drm_private {
struct etnaviv_cmdbuf_suballoc *cmdbuf_suballoc;
struct etnaviv_iommu_global *mmu_global;
struct xarray active_contexts;
u32 next_context_id;
/* list of GEM objects: */
struct mutex gem_lock;
struct list_head gem_list;