Commit c3be245d authored by Damodharam Ammepalli's avatar Damodharam Ammepalli Committed by Paolo Abeni
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bnxt_en: add .set_module_eeprom_by_page() support 



Add support for .set_module_eeprom_by_page() callback
which implements generic solution for modules eeprom access.
This implementation also supports CMIS 5.0.3 compliant
eeprom FW download.

Sample Usage:
ethtool --flash-module-firmware enp177s0np0 file dummy.bin

Signed-off-by: default avatarDamodharam Ammepalli <damodharam.ammepalli@broadcom.com>
Signed-off-by: default avatarMichael Chan <michael.chan@broadcom.com>
Link: https://patch.msgid.link/20250310183129.3154117-8-michael.chan@broadcom.com


Reviewed-by: default avatarJacob Keller <jacob.e.keller@intel.com>
Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
parent 1b64544d

drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c

+58 −1
Original line number Diff line number Diff line
@@ -4550,7 +4550,7 @@ bnxt_mod_eeprom_by_page_precheck(struct bnxt *bp, 


	if (BNXT_VF(bp) && !BNXT_VF_IS_TRUSTED(bp)) {

		NL_SET_ERR_MSG_MOD(extack,

				   "Module read not permitted on untrusted VF");

				   "Module read/write not permitted on untrusted VF");

		return -EPERM;

	}
@@ -4593,6 +4593,62 @@ static int bnxt_get_module_eeprom_by_page(struct net_device *dev, 
	return page_data->length;

}



static int bnxt_write_sfp_module_eeprom_info(struct bnxt *bp,

					     const struct ethtool_module_eeprom *page)

{

	struct hwrm_port_phy_i2c_write_input *req;

	int bytes_written = 0;

	int rc;



	rc = hwrm_req_init(bp, req, HWRM_PORT_PHY_I2C_WRITE);

	if (rc)

		return rc;



	hwrm_req_hold(bp, req);

	req->i2c_slave_addr = page->i2c_address << 1;

	req->page_number = cpu_to_le16(page->page);

	req->bank_number = page->bank;

	req->port_id = cpu_to_le16(bp->pf.port_id);

	req->enables = cpu_to_le32(PORT_PHY_I2C_WRITE_REQ_ENABLES_PAGE_OFFSET |

				   PORT_PHY_I2C_WRITE_REQ_ENABLES_BANK_NUMBER);



	while (bytes_written < page->length) {

		u16 xfer_size;



		xfer_size = min_t(u16, page->length - bytes_written,

				  BNXT_MAX_PHY_I2C_RESP_SIZE);

		req->page_offset = cpu_to_le16(page->offset + bytes_written);

		req->data_length = xfer_size;

		memcpy(req->data, page->data + bytes_written, xfer_size);

		rc = hwrm_req_send(bp, req);

		if (rc)

			break;

		bytes_written += xfer_size;

	}



	hwrm_req_drop(bp, req);

	return rc;

}



static int bnxt_set_module_eeprom_by_page(struct net_device *dev,

					  const struct ethtool_module_eeprom *page_data,

					  struct netlink_ext_ack *extack)

{

	struct bnxt *bp = netdev_priv(dev);

	int rc;



	rc = bnxt_mod_eeprom_by_page_precheck(bp, page_data, extack);

	if (rc)

		return rc;



	rc = bnxt_write_sfp_module_eeprom_info(bp, page_data);

	if (rc) {

		NL_SET_ERR_MSG_MOD(extack, "Module`s eeprom write failed");

		return rc;

	}

	return page_data->length;

}



static int bnxt_nway_reset(struct net_device *dev)

{

	int rc = 0;
@@ -5455,6 +5511,7 @@ const struct ethtool_ops bnxt_ethtool_ops = { 
	.get_module_info	= bnxt_get_module_info,

	.get_module_eeprom	= bnxt_get_module_eeprom,

	.get_module_eeprom_by_page = bnxt_get_module_eeprom_by_page,

	.set_module_eeprom_by_page = bnxt_set_module_eeprom_by_page,

	.nway_reset		= bnxt_nway_reset,

	.set_phys_id		= bnxt_set_phys_id,

	.self_test		= bnxt_self_test,