drivers/net/ethernet/marvell/octeontx2/af/rvu_cgx.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/marvell/octeontx2/af/rvu_cgx.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/marvell/octeontx2/af/rvu_cgx.c
Extension
.c
Size
35366 bytes
Lines
1358
Domain
Driver Families
Bucket
drivers/net
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 cgx_evq_entry {
	struct list_head evq_node;
	struct cgx_link_event link_event;
};

#define M(_name, _id, _fn_name, _req_type, _rsp_type)			\
static struct _req_type __maybe_unused					\
*otx2_mbox_alloc_msg_ ## _fn_name(struct rvu *rvu, int devid)		\
{									\
	struct _req_type *req;						\
									\
	req = (struct _req_type *)otx2_mbox_alloc_msg_rsp(		\
		&rvu->afpf_wq_info.mbox_up, devid, sizeof(struct _req_type), \
		sizeof(struct _rsp_type));				\
	if (!req)							\
		return NULL;						\
	req->hdr.sig = OTX2_MBOX_REQ_SIG;				\
	req->hdr.id = _id;						\
	trace_otx2_msg_alloc(rvu->pdev, _id, sizeof(*req), 0);		\
	return req;							\
}

MBOX_UP_CGX_MESSAGES
#undef M

bool is_mac_feature_supported(struct rvu *rvu, int pf, int feature)
{
	u8 cgx_id, lmac_id;
	void *cgxd;

	if (!is_pf_cgxmapped(rvu, pf))
		return 0;

	rvu_get_cgx_lmac_id(rvu->pf2cgxlmac_map[pf], &cgx_id, &lmac_id);
	cgxd = rvu_cgx_pdata(cgx_id, rvu);

	return  (cgx_features_get(cgxd) & feature);
}

#define CGX_OFFSET(x)			((x) * rvu->hw->lmac_per_cgx)
/* Returns bitmap of mapped PFs */
static u64 cgxlmac_to_pfmap(struct rvu *rvu, u8 cgx_id, u8 lmac_id)
{
	return rvu->cgxlmac2pf_map[CGX_OFFSET(cgx_id) + lmac_id];
}

int cgxlmac_to_pf(struct rvu *rvu, int cgx_id, int lmac_id)
{
	unsigned long pfmap;

	pfmap = cgxlmac_to_pfmap(rvu, cgx_id, lmac_id);

	/* Assumes only one pf mapped to a cgx lmac port */
	if (!pfmap)
		return -ENODEV;
	else
		return find_first_bit(&pfmap,
				      rvu->cgx_cnt_max * rvu->hw->lmac_per_cgx);
}

static u8 cgxlmac_id_to_bmap(u8 cgx_id, u8 lmac_id)
{
	return ((cgx_id & 0xF) << 4) | (lmac_id & 0xF);
}

void *rvu_cgx_pdata(u8 cgx_id, struct rvu *rvu)
{
	if (cgx_id >= rvu->cgx_cnt_max)
		return NULL;

	return rvu->cgx_idmap[cgx_id];
}

/* Return first enabled CGX instance if none are enabled then return NULL */
void *rvu_first_cgx_pdata(struct rvu *rvu)
{
	int first_enabled_cgx = 0;
	void *cgxd = NULL;

	for (; first_enabled_cgx < rvu->cgx_cnt_max; first_enabled_cgx++) {
		cgxd = rvu_cgx_pdata(first_enabled_cgx, rvu);
		if (cgxd)
			break;
	}

	return cgxd;
}

/* Based on P2X connectivity find mapped NIX block for a PF */
static void rvu_map_cgx_nix_block(struct rvu *rvu, int pf,

Annotation

Implementation Notes