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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/drivers/gpu/drm/nouveau/nouveau_grctx.h
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#ifndef __NOUVEAU_GRCTX_H__

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#define __NOUVEAU_GRCTX_H__

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struct nouveau_grctx {

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	struct drm_device *dev;

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	enum {

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		NOUVEAU_GRCTX_PROG,

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		NOUVEAU_GRCTX_VALS

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	} mode;

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	void *data;

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	uint32_t ctxprog_max;

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	uint32_t ctxprog_len;

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	uint32_t ctxprog_reg;

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	int      ctxprog_label[32];

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	uint32_t ctxvals_pos;

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	uint32_t ctxvals_base;

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};

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#ifdef CP_CTX

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static inline void

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cp_out(struct nouveau_grctx *ctx, uint32_t inst)

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{

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	uint32_t *ctxprog = ctx->data;

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	if (ctx->mode != NOUVEAU_GRCTX_PROG)

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		return;

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	BUG_ON(ctx->ctxprog_len == ctx->ctxprog_max);

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	ctxprog[ctx->ctxprog_len++] = inst;

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}

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static inline void

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cp_lsr(struct nouveau_grctx *ctx, uint32_t val)

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{

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	cp_out(ctx, CP_LOAD_SR | val);

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}

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static inline void

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cp_ctx(struct nouveau_grctx *ctx, uint32_t reg, uint32_t length)

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{

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	ctx->ctxprog_reg = (reg - 0x00400000) >> 2;

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	ctx->ctxvals_base = ctx->ctxvals_pos;

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

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	if (length > (CP_CTX_COUNT >> CP_CTX_COUNT_SHIFT)) {

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		cp_lsr(ctx, length);

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		length = 0;

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	}

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

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}

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static inline void

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cp_name(struct nouveau_grctx *ctx, int name)

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{

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	uint32_t *ctxprog = ctx->data;

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	int i;

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	if (ctx->mode != NOUVEAU_GRCTX_PROG)

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		return;

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	ctx->ctxprog_label[name] = ctx->ctxprog_len;

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	for (i = 0; i < ctx->ctxprog_len; i++) {

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		if ((ctxprog[i] & 0xfff00000) != 0xff400000)

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			continue;

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		if ((ctxprog[i] & CP_BRA_IP) != ((name) << CP_BRA_IP_SHIFT))

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			continue;

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		ctxprog[i] = (ctxprog[i] & 0x00ff00ff) |

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			     (ctx->ctxprog_len << CP_BRA_IP_SHIFT);

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	}

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}

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static inline void

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_cp_bra(struct nouveau_grctx *ctx, u32 mod, int flag, int state, int name)

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{

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	int ip = 0;

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	if (mod != 2) {

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		ip = ctx->ctxprog_label[name] << CP_BRA_IP_SHIFT;

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		if (ip == 0)

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			ip = 0xff000000 | (name << CP_BRA_IP_SHIFT);

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	}

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	cp_out(ctx, CP_BRA | (mod << 18) | ip | flag |

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		    (state ? 0 : CP_BRA_IF_CLEAR));

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}

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#define cp_bra(c, f, s, n) _cp_bra((c), 0, CP_FLAG_##f, CP_FLAG_##f##_##s, n)

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#ifdef CP_BRA_MOD

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#define cp_cal(c, f, s, n) _cp_bra((c), 1, CP_FLAG_##f, CP_FLAG_##f##_##s, n)

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#define cp_ret(c, f, s) _cp_bra((c), 2, CP_FLAG_##f, CP_FLAG_##f##_##s, 0)

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#endif

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static inline void

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_cp_wait(struct nouveau_grctx *ctx, int flag, int state)

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{

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	cp_out(ctx, CP_WAIT | flag | (state ? CP_WAIT_SET : 0));

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}

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#define cp_wait(c, f, s) _cp_wait((c), CP_FLAG_##f, CP_FLAG_##f##_##s)

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static inline void

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_cp_set(struct nouveau_grctx *ctx, int flag, int state)

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{

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	cp_out(ctx, CP_SET | flag | (state ? CP_SET_1 : 0));

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}

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#define cp_set(c, f, s) _cp_set((c), CP_FLAG_##f, CP_FLAG_##f##_##s)

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static inline void

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cp_pos(struct nouveau_grctx *ctx, int offset)

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{

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	ctx->ctxvals_pos = offset;

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	ctx->ctxvals_base = ctx->ctxvals_pos;

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	cp_lsr(ctx, ctx->ctxvals_pos);

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	cp_out(ctx, CP_SET_CONTEXT_POINTER);

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}

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static inline void

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gr_def(struct nouveau_grctx *ctx, uint32_t reg, uint32_t val)

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{

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	if (ctx->mode != NOUVEAU_GRCTX_VALS)

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		return;

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	reg = (reg - 0x00400000) / 4;

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	reg = (reg - ctx->ctxprog_reg) + ctx->ctxvals_base;

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	nv_wo32(ctx->data, reg * 4, val);

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}

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#endif

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#endif

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