linux_kernel/drivers/gpu/drm/nouveau/nvkm/engine/gr/ctxnv40.h

#ifndef __NVKM_GRCTX_H__
#define __NVKM_GRCTX_H__
#include <core/gpuobj.h>

struct nvkm_grctx {
	struct nvkm_device *device;

	enum {
		NVKM_GRCTX_PROG,
		NVKM_GRCTX_VALS
	} mode;
	u32 *ucode;
	struct nvkm_gpuobj *data;

	u32 ctxprog_max;
	u32 ctxprog_len;
	u32 ctxprog_reg;
	int ctxprog_label[32];
	u32 ctxvals_pos;
	u32 ctxvals_base;
};

static inline void
cp_out(struct nvkm_grctx *ctx, u32 inst)
{
	u32 *ctxprog = ctx->ucode;

	if (ctx->mode != NVKM_GRCTX_PROG)
		return;

	BUG_ON(ctx->ctxprog_len == ctx->ctxprog_max);
	ctxprog[ctx->ctxprog_len++] = inst;
}

static inline void
cp_lsr(struct nvkm_grctx *ctx, u32 val)
{
	cp_out(ctx, CP_LOAD_SR | val);
}

static inline void
cp_ctx(struct nvkm_grctx *ctx, u32 reg, u32 length)
{
	ctx->ctxprog_reg = (reg - 0x00400000) >> 2;

	ctx->ctxvals_base = ctx->ctxvals_pos;
	ctx->ctxvals_pos = ctx->ctxvals_base + length;

	if (length > (CP_CTX_COUNT >> CP_CTX_COUNT_SHIFT)) {
		cp_lsr(ctx, length);
		length = 0;
	}

	cp_out(ctx, CP_CTX | (length << CP_CTX_COUNT_SHIFT) | ctx->ctxprog_reg);
}

static inline void
cp_name(struct nvkm_grctx *ctx, int name)
{
	u32 *ctxprog = ctx->ucode;
	int i;

	if (ctx->mode != NVKM_GRCTX_PROG)
		return;

	ctx->ctxprog_label[name] = ctx->ctxprog_len;
	for (i = 0; i < ctx->ctxprog_len; i++) {
		if ((ctxprog[i] & 0xfff00000) != 0xff400000)
			continue;
		if ((ctxprog[i] & CP_BRA_IP) != ((name) << CP_BRA_IP_SHIFT))
			continue;
		ctxprog[i] = (ctxprog[i] & 0x00ff00ff) |
			     (ctx->ctxprog_len << CP_BRA_IP_SHIFT);
	}
}

static inline void
_cp_bra(struct nvkm_grctx *ctx, u32 mod, int flag, int state, int name)
{
	int ip = 0;

	if (mod != 2) {
		ip = ctx->ctxprog_label[name] << CP_BRA_IP_SHIFT;
		if (ip == 0)
			ip = 0xff000000 | (name << CP_BRA_IP_SHIFT);
	}

	cp_out(ctx, CP_BRA | (mod << 18) | ip | flag |
		    (state ? 0 : CP_BRA_IF_CLEAR));
}
#define cp_bra(c, f, s, n) _cp_bra((c), 0, CP_FLAG_##f, CP_FLAG_##f##_##s, n)
#define cp_cal(c, f, s, n) _cp_bra((c), 1, CP_FLAG_##f, CP_FLAG_##f##_##s, n)
#define cp_ret(c, f, s) _cp_bra((c), 2, CP_FLAG_##f, CP_FLAG_##f##_##s, 0)

static inline void
_cp_wait(struct nvkm_grctx *ctx, int flag, int state)
{
	cp_out(ctx, CP_WAIT | flag | (state ? CP_WAIT_SET : 0));
}
#define cp_wait(c, f, s) _cp_wait((c), CP_FLAG_##f, CP_FLAG_##f##_##s)

static inline void
_cp_set(struct nvkm_grctx *ctx, int flag, int state)
{
	cp_out(ctx, CP_SET | flag | (state ? CP_SET_1 : 0));
}
#define cp_set(c, f, s) _cp_set((c), CP_FLAG_##f, CP_FLAG_##f##_##s)

static inline void
cp_pos(struct nvkm_grctx *ctx, int offset)
{
	ctx->ctxvals_pos = offset;
	ctx->ctxvals_base = ctx->ctxvals_pos;

	cp_lsr(ctx, ctx->ctxvals_pos);
	cp_out(ctx, CP_SET_CONTEXT_POINTER);
}

static inline void
gr_def(struct nvkm_grctx *ctx, u32 reg, u32 val)
{
	if (ctx->mode != NVKM_GRCTX_VALS)
		return;

	reg = (reg - 0x00400000) / 4;
	reg = (reg - ctx->ctxprog_reg) + ctx->ctxvals_base;

	nvkm_wo32(ctx->data, reg * 4, val);
}
#endif