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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-20 01:18:08 +07:00
sfc: Add ethtool -m support for QSFP modules
This also adds support for non-QSFP modules attached to QSFP. Signed-off-by: Martin Habets <mhabets@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Martin Habets
David S. Miller
parent
bb4d991a28
commit
9b17010da5
@ -746,59 +746,171 @@ static const char *efx_mcdi_phy_test_name(struct efx_nic *efx,
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return NULL;
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}
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#define SFP_PAGE_SIZE 128
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#define SFP_NUM_PAGES 2
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static int efx_mcdi_phy_get_module_eeprom(struct efx_nic *efx,
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struct ethtool_eeprom *ee, u8 *data)
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#define SFP_PAGE_SIZE 128
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#define SFF_DIAG_TYPE_OFFSET 92
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#define SFF_DIAG_ADDR_CHANGE BIT(2)
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#define SFF_8079_NUM_PAGES 2
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#define SFF_8472_NUM_PAGES 4
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#define SFF_8436_NUM_PAGES 5
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#define SFF_DMT_LEVEL_OFFSET 94
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/** efx_mcdi_phy_get_module_eeprom_page() - Get a single page of module eeprom
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* @efx: NIC context
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* @page: EEPROM page number
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* @data: Destination data pointer
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* @offset: Offset in page to copy from in to data
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* @space: Space available in data
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*
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* Return:
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* >=0 - amount of data copied
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* <0 - error
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*/
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static int efx_mcdi_phy_get_module_eeprom_page(struct efx_nic *efx,
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unsigned int page,
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u8 *data, ssize_t offset,
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ssize_t space)
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{
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MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_PHY_MEDIA_INFO_OUT_LENMAX);
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MCDI_DECLARE_BUF(inbuf, MC_CMD_GET_PHY_MEDIA_INFO_IN_LEN);
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size_t outlen;
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int rc;
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unsigned int payload_len;
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unsigned int space_remaining = ee->len;
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unsigned int page;
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unsigned int page_off;
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unsigned int to_copy;
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u8 *user_data = data;
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int rc;
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BUILD_BUG_ON(SFP_PAGE_SIZE * SFP_NUM_PAGES != ETH_MODULE_SFF_8079_LEN);
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if (offset > SFP_PAGE_SIZE)
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return -EINVAL;
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to_copy = min(space, SFP_PAGE_SIZE - offset);
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MCDI_SET_DWORD(inbuf, GET_PHY_MEDIA_INFO_IN_PAGE, page);
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rc = efx_mcdi_rpc_quiet(efx, MC_CMD_GET_PHY_MEDIA_INFO,
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inbuf, sizeof(inbuf),
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outbuf, sizeof(outbuf),
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&outlen);
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if (rc)
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return rc;
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if (outlen < (MC_CMD_GET_PHY_MEDIA_INFO_OUT_DATA_OFST +
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SFP_PAGE_SIZE))
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return -EIO;
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payload_len = MCDI_DWORD(outbuf, GET_PHY_MEDIA_INFO_OUT_DATALEN);
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if (payload_len != SFP_PAGE_SIZE)
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return -EIO;
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memcpy(data, MCDI_PTR(outbuf, GET_PHY_MEDIA_INFO_OUT_DATA) + offset,
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to_copy);
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return to_copy;
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}
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static int efx_mcdi_phy_get_module_eeprom_byte(struct efx_nic *efx,
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unsigned int page,
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u8 byte)
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{
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int rc;
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u8 data;
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rc = efx_mcdi_phy_get_module_eeprom_page(efx, page, &data, byte, 1);
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if (rc == 1)
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return data;
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return rc;
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}
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static int efx_mcdi_phy_diag_type(struct efx_nic *efx)
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{
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/* Page zero of the EEPROM includes the diagnostic type at byte 92. */
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return efx_mcdi_phy_get_module_eeprom_byte(efx, 0,
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SFF_DIAG_TYPE_OFFSET);
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}
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static int efx_mcdi_phy_sff_8472_level(struct efx_nic *efx)
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{
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/* Page zero of the EEPROM includes the DMT level at byte 94. */
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return efx_mcdi_phy_get_module_eeprom_byte(efx, 0,
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SFF_DMT_LEVEL_OFFSET);
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}
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static u32 efx_mcdi_phy_module_type(struct efx_nic *efx)
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{
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struct efx_mcdi_phy_data *phy_data = efx->phy_data;
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if (phy_data->media != MC_CMD_MEDIA_QSFP_PLUS)
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return phy_data->media;
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/* A QSFP+ NIC may actually have an SFP+ module attached.
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* The ID is page 0, byte 0.
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*/
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switch (efx_mcdi_phy_get_module_eeprom_byte(efx, 0, 0)) {
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case 0x3:
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return MC_CMD_MEDIA_SFP_PLUS;
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case 0xc:
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case 0xd:
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return MC_CMD_MEDIA_QSFP_PLUS;
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default:
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return 0;
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}
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}
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static int efx_mcdi_phy_get_module_eeprom(struct efx_nic *efx,
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struct ethtool_eeprom *ee, u8 *data)
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{
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int rc;
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ssize_t space_remaining = ee->len;
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unsigned int page_off;
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bool ignore_missing;
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int num_pages;
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int page;
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switch (efx_mcdi_phy_module_type(efx)) {
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case MC_CMD_MEDIA_SFP_PLUS:
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num_pages = efx_mcdi_phy_sff_8472_level(efx) > 0 ?
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SFF_8472_NUM_PAGES : SFF_8079_NUM_PAGES;
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page = 0;
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ignore_missing = false;
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break;
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case MC_CMD_MEDIA_QSFP_PLUS:
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num_pages = SFF_8436_NUM_PAGES;
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page = -1; /* We obtain the lower page by asking for -1. */
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ignore_missing = true; /* Ignore missing pages after page 0. */
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break;
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default:
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return -EOPNOTSUPP;
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}
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page_off = ee->offset % SFP_PAGE_SIZE;
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page = ee->offset / SFP_PAGE_SIZE;
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page += ee->offset / SFP_PAGE_SIZE;
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while (space_remaining && (page < SFP_NUM_PAGES)) {
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MCDI_SET_DWORD(inbuf, GET_PHY_MEDIA_INFO_IN_PAGE, page);
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while (space_remaining && (page < num_pages)) {
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rc = efx_mcdi_phy_get_module_eeprom_page(efx, page,
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data, page_off,
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space_remaining);
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rc = efx_mcdi_rpc(efx, MC_CMD_GET_PHY_MEDIA_INFO,
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inbuf, sizeof(inbuf),
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outbuf, sizeof(outbuf),
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&outlen);
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if (rc)
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if (rc > 0) {
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space_remaining -= rc;
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data += rc;
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page_off = 0;
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page++;
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} else if (rc == 0) {
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space_remaining = 0;
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} else if (ignore_missing && (page > 0)) {
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int intended_size = SFP_PAGE_SIZE - page_off;
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space_remaining -= intended_size;
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if (space_remaining < 0) {
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space_remaining = 0;
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} else {
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memset(data, 0, intended_size);
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data += intended_size;
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page_off = 0;
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page++;
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rc = 0;
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}
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} else {
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return rc;
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if (outlen < (MC_CMD_GET_PHY_MEDIA_INFO_OUT_DATA_OFST +
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SFP_PAGE_SIZE))
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return -EIO;
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payload_len = MCDI_DWORD(outbuf,
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GET_PHY_MEDIA_INFO_OUT_DATALEN);
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if (payload_len != SFP_PAGE_SIZE)
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return -EIO;
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/* Copy as much as we can into data */
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payload_len -= page_off;
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to_copy = (space_remaining < payload_len) ?
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space_remaining : payload_len;
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memcpy(user_data,
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MCDI_PTR(outbuf, GET_PHY_MEDIA_INFO_OUT_DATA) + page_off,
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to_copy);
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space_remaining -= to_copy;
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user_data += to_copy;
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page_off = 0;
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page++;
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}
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}
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return 0;
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@ -807,16 +919,42 @@ static int efx_mcdi_phy_get_module_eeprom(struct efx_nic *efx,
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static int efx_mcdi_phy_get_module_info(struct efx_nic *efx,
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struct ethtool_modinfo *modinfo)
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{
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struct efx_mcdi_phy_data *phy_cfg = efx->phy_data;
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int sff_8472_level;
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int diag_type;
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switch (phy_cfg->media) {
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switch (efx_mcdi_phy_module_type(efx)) {
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case MC_CMD_MEDIA_SFP_PLUS:
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modinfo->type = ETH_MODULE_SFF_8079;
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modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN;
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return 0;
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sff_8472_level = efx_mcdi_phy_sff_8472_level(efx);
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/* If we can't read the diagnostics level we have none. */
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if (sff_8472_level < 0)
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return -EOPNOTSUPP;
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/* Check if this module requires the (unsupported) address
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* change operation.
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*/
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diag_type = efx_mcdi_phy_diag_type(efx);
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if ((sff_8472_level == 0) ||
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(diag_type & SFF_DIAG_ADDR_CHANGE)) {
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modinfo->type = ETH_MODULE_SFF_8079;
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modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN;
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} else {
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modinfo->type = ETH_MODULE_SFF_8472;
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modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN;
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}
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break;
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case MC_CMD_MEDIA_QSFP_PLUS:
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modinfo->type = ETH_MODULE_SFF_8436;
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modinfo->eeprom_len = ETH_MODULE_SFF_8436_LEN;
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break;
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default:
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return -EOPNOTSUPP;
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}
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return 0;
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}
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static const struct efx_phy_operations efx_mcdi_phy_ops = {
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