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/* SPDX-License-Identifier: GPL-2.0-only OR MIT */
/* Copyright (c) 2023 Imagination Technologies Ltd. */
#ifndef PVR_HWRT_H
#define PVR_HWRT_H
#include <linux/compiler_attributes.h>
#include <linux/kref.h>
#include <linux/list.h>
#include <linux/types.h>
#include <linux/xarray.h>
#include <uapi/drm/pvr_drm.h>
#include "pvr_device.h"
#include "pvr_rogue_fwif_shared.h"
/* Forward declaration from pvr_free_list.h. */
struct pvr_free_list;
/* Forward declaration from pvr_gem.h. */
struct pvr_fw_object;
/**
* struct pvr_hwrt_data - structure representing HWRT data
*/
struct pvr_hwrt_data {
/** @fw_obj: FW object representing the FW-side structure. */
struct pvr_fw_object *fw_obj;
/** @data: Local copy of FW-side structure. */
struct rogue_fwif_hwrtdata data;
/** @freelist_node: List node connecting this HWRT to the local freelist. */
struct list_head freelist_node;
/**
* @srtc_obj: FW object representing shadow render target cache.
*
* Only valid if @max_rts > 1.
*/
struct pvr_fw_object *srtc_obj;
/**
* @raa_obj: FW object representing renders accumulation array.
*
* Only valid if @max_rts > 1.
*/
struct pvr_fw_object *raa_obj;
/** @hwrt_dataset: Back pointer to owning HWRT dataset. */
struct pvr_hwrt_dataset *hwrt_dataset;
};
/**
* struct pvr_hwrt_dataset - structure representing a HWRT data set.
*/
struct pvr_hwrt_dataset {
/** @ref_count: Reference count of object. */
struct kref ref_count;
/** @pvr_dev: Pointer to device that owns this object. */
struct pvr_device *pvr_dev;
/** @common_fw_obj: FW object representing common FW-side structure. */
struct pvr_fw_object *common_fw_obj;
/** @common: Common HWRT data. */
struct rogue_fwif_hwrtdata_common common;
/** @data: HWRT data structures belonging to this set. */
struct pvr_hwrt_data data[ROGUE_FWIF_NUM_RTDATAS];
/** @free_lists: Free lists used by HWRT data set. */
struct pvr_free_list *free_lists[ROGUE_FWIF_NUM_RTDATA_FREELISTS];
/** @max_rts: Maximum render targets for this HWRT data set. */
u16 max_rts;
};
struct pvr_hwrt_dataset *
pvr_hwrt_dataset_create(struct pvr_file *pvr_file,
struct drm_pvr_ioctl_create_hwrt_dataset_args *args);
void
pvr_destroy_hwrt_datasets_for_file(struct pvr_file *pvr_file);
/**
* pvr_hwrt_dataset_lookup() - Lookup HWRT dataset pointer from handle
* @pvr_file: Pointer to pvr_file structure.
* @handle: Object handle.
*
* Takes reference on dataset object. Call pvr_hwrt_dataset_put() to release.
*
* Returns:
* * The requested object on success, or
* * %NULL on failure (object does not exist in list, or is not a HWRT
* dataset)
*/
static __always_inline struct pvr_hwrt_dataset *
pvr_hwrt_dataset_lookup(struct pvr_file *pvr_file, u32 handle)
{
struct pvr_hwrt_dataset *hwrt;
xa_lock(&pvr_file->hwrt_handles);
hwrt = xa_load(&pvr_file->hwrt_handles, handle);
if (hwrt)
kref_get(&hwrt->ref_count);
xa_unlock(&pvr_file->hwrt_handles);
return hwrt;
}
void
pvr_hwrt_dataset_put(struct pvr_hwrt_dataset *hwrt);
/**
* pvr_hwrt_data_lookup() - Lookup HWRT data pointer from handle and index
* @pvr_file: Pointer to pvr_file structure.
* @handle: Object handle.
* @index: Index of RT data within dataset.
*
* Takes reference on dataset object. Call pvr_hwrt_data_put() to release.
*
* Returns:
* * The requested object on success, or
* * %NULL on failure (object does not exist in list, or is not a HWRT
* dataset, or index is out of range)
*/
static __always_inline struct pvr_hwrt_data *
pvr_hwrt_data_lookup(struct pvr_file *pvr_file, u32 handle, u32 index)
{
struct pvr_hwrt_dataset *hwrt_dataset = pvr_hwrt_dataset_lookup(pvr_file, handle);
if (hwrt_dataset) {
if (index < ARRAY_SIZE(hwrt_dataset->data))
return &hwrt_dataset->data[index];
pvr_hwrt_dataset_put(hwrt_dataset);
}
return NULL;
}
/**
* pvr_hwrt_data_put() - Release reference on HWRT data
* @hwrt: Pointer to HWRT data to release reference on
*/
static __always_inline void
pvr_hwrt_data_put(struct pvr_hwrt_data *hwrt)
{
if (hwrt)
pvr_hwrt_dataset_put(hwrt->hwrt_dataset);
}
static __always_inline struct pvr_hwrt_data *
pvr_hwrt_data_get(struct pvr_hwrt_data *hwrt)
{
if (hwrt)
kref_get(&hwrt->hwrt_dataset->ref_count);
return hwrt;
}
#endif /* PVR_HWRT_H */
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