drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c
Extension
.c
Size
102659 bytes
Lines
3713
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 code_entry {
	u32 sram_start_addr;
	u32 code_attribute;
#define CODE_IMAGE_TYPE_MASK			0xf0800003
#define CODE_IMAGE_VNTAG_PROFILES_DATA		0xd0000003
#define CODE_IMAGE_LENGTH_MASK			0x007ffffc
#define CODE_IMAGE_TYPE_EXTENDED_DIR		0xe0000000
	u32 nvm_start_addr;
};

#define CODE_ENTRY_MAX			16
#define CODE_ENTRY_EXTENDED_DIR_IDX	15
#define MAX_IMAGES_IN_EXTENDED_DIR	64
#define NVRAM_DIR_OFFSET		0x14

#define EXTENDED_DIR_EXISTS(code)					  \
	((code & CODE_IMAGE_TYPE_MASK) == CODE_IMAGE_TYPE_EXTENDED_DIR && \
	 (code & CODE_IMAGE_LENGTH_MASK) != 0)

#define CRC32_RESIDUAL			0xdebb20e3
#define CRC_BUFF_SIZE			256

static int bnx2x_nvram_crc(struct bnx2x *bp,
			   int offset,
			   int size,
			   u8 *buff)
{
	u32 crc = ~0;
	int rc = 0, done = 0;

	DP(BNX2X_MSG_ETHTOOL | BNX2X_MSG_NVM,
	   "NVRAM CRC from 0x%08x to 0x%08x\n", offset, offset + size);

	while (done < size) {
		int count = min_t(int, size - done, CRC_BUFF_SIZE);

		rc = bnx2x_nvram_read(bp, offset + done, buff, count);

		if (rc)
			return rc;

		crc = crc32_le(crc, buff, count);
		done += count;
	}

	if (crc != CRC32_RESIDUAL)
		rc = -EINVAL;

	return rc;
}

static int bnx2x_test_nvram_dir(struct bnx2x *bp,
				struct code_entry *entry,
				u8 *buff)
{
	size_t size = entry->code_attribute & CODE_IMAGE_LENGTH_MASK;
	u32 type = entry->code_attribute & CODE_IMAGE_TYPE_MASK;
	int rc;

	/* Zero-length images and AFEX profiles do not have CRC */
	if (size == 0 || type == CODE_IMAGE_VNTAG_PROFILES_DATA)
		return 0;

	rc = bnx2x_nvram_crc(bp, entry->nvm_start_addr, size, buff);
	if (rc)
		DP(BNX2X_MSG_ETHTOOL | BNX2X_MSG_NVM,
		   "image %x has failed crc test (rc %d)\n", type, rc);

	return rc;
}

static int bnx2x_test_dir_entry(struct bnx2x *bp, u32 addr, u8 *buff)
{
	int rc;
	struct code_entry entry;

	rc = bnx2x_nvram_read32(bp, addr, (u32 *)&entry, sizeof(entry));
	if (rc)
		return rc;

	return bnx2x_test_nvram_dir(bp, &entry, buff);
}

static int bnx2x_test_nvram_ext_dirs(struct bnx2x *bp, u8 *buff)
{
	u32 rc, cnt, dir_offset = NVRAM_DIR_OFFSET;
	struct code_entry entry;
	int i;

	rc = bnx2x_nvram_read32(bp,

Annotation

Implementation Notes