drivers/net/ethernet/netronome/nfp/nfpcore/nfp_rtsym.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_rtsym.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/netronome/nfp/nfpcore/nfp_rtsym.c
Extension
.c
Size
13252 bytes
Lines
557
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 nfp_rtsym_entry {
	u8	type;
	u8	target;
	u8	island;
	u8	addr_hi;
	__le32	addr_lo;
	__le16	name;
	u8	menum;
	u8	size_hi;
	__le32	size_lo;
};

struct nfp_rtsym_table {
	struct nfp_cpp *cpp;
	int num;
	char *strtab;
	struct nfp_rtsym symtab[];
};

static int nfp_meid(u8 island_id, u8 menum)
{
	return (island_id & 0x3F) == island_id && menum < 12 ?
		(island_id << 4) | (menum + 4) : -1;
}

static void
nfp_rtsym_sw_entry_init(struct nfp_rtsym_table *cache, u32 strtab_size,
			struct nfp_rtsym *sw, struct nfp_rtsym_entry *fw)
{
	sw->type = fw->type;
	sw->name = cache->strtab + le16_to_cpu(fw->name) % strtab_size;
	sw->addr = ((u64)fw->addr_hi << 32) | le32_to_cpu(fw->addr_lo);
	sw->size = ((u64)fw->size_hi << 32) | le32_to_cpu(fw->size_lo);

	switch (fw->target) {
	case SYM_TGT_LMEM:
		sw->target = NFP_RTSYM_TARGET_LMEM;
		break;
	case SYM_TGT_EMU_CACHE:
		sw->target = NFP_RTSYM_TARGET_EMU_CACHE;
		break;
	default:
		sw->target = fw->target;
		break;
	}

	if (fw->menum != 0xff)
		sw->domain = nfp_meid(fw->island, fw->menum);
	else if (fw->island != 0xff)
		sw->domain = fw->island;
	else
		sw->domain = -1;
}

struct nfp_rtsym_table *nfp_rtsym_table_read(struct nfp_cpp *cpp)
{
	struct nfp_rtsym_table *rtbl;
	const struct nfp_mip *mip;

	mip = nfp_mip_open(cpp);
	rtbl = __nfp_rtsym_table_read(cpp, mip);
	nfp_mip_close(mip);

	return rtbl;
}

struct nfp_rtsym_table *
__nfp_rtsym_table_read(struct nfp_cpp *cpp, const struct nfp_mip *mip)
{
	const u32 dram = NFP_CPP_ID(NFP_CPP_TARGET_MU, NFP_CPP_ACTION_RW, 0) |
		NFP_ISL_EMEM0;
	u32 strtab_addr, symtab_addr, strtab_size, symtab_size;
	struct nfp_rtsym_entry *rtsymtab;
	struct nfp_rtsym_table *cache;
	int err, n, size;

	if (!mip)
		return NULL;

	nfp_mip_strtab(mip, &strtab_addr, &strtab_size);
	nfp_mip_symtab(mip, &symtab_addr, &symtab_size);

	if (!symtab_size || !strtab_size || symtab_size % sizeof(*rtsymtab))
		return NULL;

	/* Align to 64 bits */
	symtab_size = round_up(symtab_size, 8);
	strtab_size = round_up(strtab_size, 8);

	rtsymtab = kmalloc(symtab_size, GFP_KERNEL);

Annotation

Implementation Notes