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/* SPDX-License-Identifier: MIT */
/*
* Copyright © 2014 Intel Corporation
*/
#ifndef __INTEL_LRC_H__
#define __INTEL_LRC_H__
#include <linux/types.h>
#include "intel_context.h"
#include "intel_lrc_reg.h"
struct drm_i915_gem_object;
struct intel_engine_cs;
struct intel_ring;
/* At the start of the context image is its per-process HWS page */
#define LRC_PPHWSP_PN (0)
#define LRC_PPHWSP_SZ (1)
/* After the PPHWSP we have the logical state for the context */
#define LRC_STATE_PN (LRC_PPHWSP_PN + LRC_PPHWSP_SZ)
#define LRC_STATE_OFFSET (LRC_STATE_PN * PAGE_SIZE)
/* Space within PPHWSP reserved to be used as scratch */
#define LRC_PPHWSP_SCRATCH 0x34
#define LRC_PPHWSP_SCRATCH_ADDR (LRC_PPHWSP_SCRATCH * sizeof(u32))
void lrc_init_wa_ctx(struct intel_engine_cs *engine);
void lrc_fini_wa_ctx(struct intel_engine_cs *engine);
int lrc_alloc(struct intel_context *ce,
struct intel_engine_cs *engine);
void lrc_reset(struct intel_context *ce);
void lrc_fini(struct intel_context *ce);
void lrc_destroy(struct kref *kref);
int
lrc_pre_pin(struct intel_context *ce,
struct intel_engine_cs *engine,
struct i915_gem_ww_ctx *ww,
void **vaddr);
int
lrc_pin(struct intel_context *ce,
struct intel_engine_cs *engine,
void *vaddr);
void lrc_unpin(struct intel_context *ce);
void lrc_post_unpin(struct intel_context *ce);
void lrc_init_state(struct intel_context *ce,
struct intel_engine_cs *engine,
void *state);
void lrc_init_regs(const struct intel_context *ce,
const struct intel_engine_cs *engine,
bool clear);
void lrc_reset_regs(const struct intel_context *ce,
const struct intel_engine_cs *engine);
u32 lrc_update_regs(const struct intel_context *ce,
const struct intel_engine_cs *engine,
u32 head);
void lrc_update_offsets(struct intel_context *ce,
struct intel_engine_cs *engine);
void lrc_check_regs(const struct intel_context *ce,
const struct intel_engine_cs *engine,
const char *when);
void lrc_update_runtime(struct intel_context *ce);
static inline u32 lrc_get_runtime(const struct intel_context *ce)
{
/*
* We can use either ppHWSP[16] which is recorded before the context
* switch (and so excludes the cost of context switches) or use the
* value from the context image itself, which is saved/restored earlier
* and so includes the cost of the save.
*/
return READ_ONCE(ce->lrc_reg_state[CTX_TIMESTAMP]);
}
#endif /* __INTEL_LRC_H__ */
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