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

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/nouveau/nvkm/engine/gr/ctxnv40.h

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/nouveau/nvkm/engine/gr/ctxnv40.h
Extension
.h
Size
2962 bytes
Lines
132
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

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)

Annotation

Implementation Notes