diff options
Diffstat (limited to 'drivers/gpu/drm/imagination/pvr_context.h')
| -rw-r--r-- | drivers/gpu/drm/imagination/pvr_context.h | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/drivers/gpu/drm/imagination/pvr_context.h b/drivers/gpu/drm/imagination/pvr_context.h new file mode 100644 index 0000000000..0c7b97dfa6 --- /dev/null +++ b/drivers/gpu/drm/imagination/pvr_context.h @@ -0,0 +1,205 @@ +/* SPDX-License-Identifier: GPL-2.0-only OR MIT */ +/* Copyright (c) 2023 Imagination Technologies Ltd. */ + +#ifndef PVR_CONTEXT_H +#define PVR_CONTEXT_H + +#include <drm/gpu_scheduler.h> + +#include <linux/compiler_attributes.h> +#include <linux/dma-fence.h> +#include <linux/kref.h> +#include <linux/types.h> +#include <linux/xarray.h> +#include <uapi/drm/pvr_drm.h> + +#include "pvr_cccb.h" +#include "pvr_device.h" +#include "pvr_queue.h" + +/* Forward declaration from pvr_gem.h. */ +struct pvr_fw_object; + +enum pvr_context_priority { + PVR_CTX_PRIORITY_LOW = 0, + PVR_CTX_PRIORITY_MEDIUM, + PVR_CTX_PRIORITY_HIGH, +}; + +/** + * struct pvr_context - Context data + */ +struct pvr_context { + /** @ref_count: Refcount for context. */ + struct kref ref_count; + + /** @pvr_dev: Pointer to owning device. */ + struct pvr_device *pvr_dev; + + /** @vm_ctx: Pointer to associated VM context. */ + struct pvr_vm_context *vm_ctx; + + /** @type: Type of context. */ + enum drm_pvr_ctx_type type; + + /** @flags: Context flags. */ + u32 flags; + + /** @priority: Context priority*/ + enum pvr_context_priority priority; + + /** @fw_obj: FW object representing FW-side context data. */ + struct pvr_fw_object *fw_obj; + + /** @data: Pointer to local copy of FW context data. */ + void *data; + + /** @data_size: Size of FW context data, in bytes. */ + u32 data_size; + + /** @ctx_id: FW context ID. */ + u32 ctx_id; + + /** + * @faulty: Set to 1 when the context queues had unfinished job when + * a GPU reset happened. + * + * In that case, the context is in an inconsistent state and can't be + * used anymore. + */ + atomic_t faulty; + + /** @queues: Union containing all kind of queues. */ + union { + struct { + /** @geometry: Geometry queue. */ + struct pvr_queue *geometry; + + /** @fragment: Fragment queue. */ + struct pvr_queue *fragment; + }; + + /** @compute: Compute queue. */ + struct pvr_queue *compute; + + /** @compute: Transfer queue. */ + struct pvr_queue *transfer; + } queues; +}; + +static __always_inline struct pvr_queue * +pvr_context_get_queue_for_job(struct pvr_context *ctx, enum drm_pvr_job_type type) +{ + switch (type) { + case DRM_PVR_JOB_TYPE_GEOMETRY: + return ctx->type == DRM_PVR_CTX_TYPE_RENDER ? ctx->queues.geometry : NULL; + case DRM_PVR_JOB_TYPE_FRAGMENT: + return ctx->type == DRM_PVR_CTX_TYPE_RENDER ? ctx->queues.fragment : NULL; + case DRM_PVR_JOB_TYPE_COMPUTE: + return ctx->type == DRM_PVR_CTX_TYPE_COMPUTE ? ctx->queues.compute : NULL; + case DRM_PVR_JOB_TYPE_TRANSFER_FRAG: + return ctx->type == DRM_PVR_CTX_TYPE_TRANSFER_FRAG ? ctx->queues.transfer : NULL; + } + + return NULL; +} + +/** + * pvr_context_get() - Take additional reference on context. + * @ctx: Context pointer. + * + * Call pvr_context_put() to release. + * + * Returns: + * * The requested context on success, or + * * %NULL if no context pointer passed. + */ +static __always_inline struct pvr_context * +pvr_context_get(struct pvr_context *ctx) +{ + if (ctx) + kref_get(&ctx->ref_count); + + return ctx; +} + +/** + * pvr_context_lookup() - Lookup context pointer from handle and file. + * @pvr_file: Pointer to pvr_file structure. + * @handle: Context handle. + * + * Takes reference on context. Call pvr_context_put() to release. + * + * Return: + * * The requested context on success, or + * * %NULL on failure (context does not exist, or does not belong to @pvr_file). + */ +static __always_inline struct pvr_context * +pvr_context_lookup(struct pvr_file *pvr_file, u32 handle) +{ + struct pvr_context *ctx; + + /* Take the array lock to protect against context removal. */ + xa_lock(&pvr_file->ctx_handles); + ctx = pvr_context_get(xa_load(&pvr_file->ctx_handles, handle)); + xa_unlock(&pvr_file->ctx_handles); + + return ctx; +} + +/** + * pvr_context_lookup_id() - Lookup context pointer from ID. + * @pvr_dev: Device pointer. + * @id: FW context ID. + * + * Takes reference on context. Call pvr_context_put() to release. + * + * Return: + * * The requested context on success, or + * * %NULL on failure (context does not exist). + */ +static __always_inline struct pvr_context * +pvr_context_lookup_id(struct pvr_device *pvr_dev, u32 id) +{ + struct pvr_context *ctx; + + /* Take the array lock to protect against context removal. */ + xa_lock(&pvr_dev->ctx_ids); + + /* Contexts are removed from the ctx_ids set in the context release path, + * meaning the ref_count reached zero before they get removed. We need + * to make sure we're not trying to acquire a context that's being + * destroyed. + */ + ctx = xa_load(&pvr_dev->ctx_ids, id); + if (!kref_get_unless_zero(&ctx->ref_count)) + ctx = NULL; + + xa_unlock(&pvr_dev->ctx_ids); + + return ctx; +} + +static __always_inline u32 +pvr_context_get_fw_addr(struct pvr_context *ctx) +{ + u32 ctx_fw_addr = 0; + + pvr_fw_object_get_fw_addr(ctx->fw_obj, &ctx_fw_addr); + + return ctx_fw_addr; +} + +void pvr_context_put(struct pvr_context *ctx); + +int pvr_context_create(struct pvr_file *pvr_file, struct drm_pvr_ioctl_create_context_args *args); + +int pvr_context_destroy(struct pvr_file *pvr_file, u32 handle); + +void pvr_destroy_contexts_for_file(struct pvr_file *pvr_file); + +void pvr_context_device_init(struct pvr_device *pvr_dev); + +void pvr_context_device_fini(struct pvr_device *pvr_dev); + +#endif /* PVR_CONTEXT_H */ |