diff --git a/drivers/net/ethernet/intel/ice/ice_common.h b/drivers/net/ethernet/intel/ice/ice_common.h index b86cfe540045..81c1bb77a9fc 100644 --- a/drivers/net/ethernet/intel/ice/ice_common.h +++ b/drivers/net/ethernet/intel/ice/ice_common.h @@ -28,6 +28,8 @@ ice_acquire_res(struct ice_hw *hw, enum ice_aq_res_ids res, enum ice_aq_res_access_type access, u32 timeout); void ice_release_res(struct ice_hw *hw, enum ice_aq_res_ids res); enum ice_status ice_init_nvm(struct ice_hw *hw); +enum ice_status ice_read_sr_buf(struct ice_hw *hw, u16 offset, u16 *words, + u16 *data); enum ice_status ice_sq_send_cmd(struct ice_hw *hw, struct ice_ctl_q_info *cq, struct ice_aq_desc *desc, void *buf, u16 buf_size, diff --git a/drivers/net/ethernet/intel/ice/ice_ethtool.c b/drivers/net/ethernet/intel/ice/ice_ethtool.c index 6facb0a7eed4..2a0bcd460d23 100644 --- a/drivers/net/ethernet/intel/ice/ice_ethtool.c +++ b/drivers/net/ethernet/intel/ice/ice_ethtool.c @@ -203,6 +203,55 @@ static void ice_set_msglevel(struct net_device *netdev, u32 data) #endif /* !CONFIG_DYNAMIC_DEBUG */ } +static int ice_get_eeprom_len(struct net_device *netdev) +{ + struct ice_netdev_priv *np = netdev_priv(netdev); + struct ice_pf *pf = np->vsi->back; + + return (int)(pf->hw.nvm.sr_words * sizeof(u16)); +} + +static int +ice_get_eeprom(struct net_device *netdev, struct ethtool_eeprom *eeprom, + u8 *bytes) +{ + struct ice_netdev_priv *np = netdev_priv(netdev); + u16 first_word, last_word, nwords; + struct ice_vsi *vsi = np->vsi; + struct ice_pf *pf = vsi->back; + struct ice_hw *hw = &pf->hw; + enum ice_status status; + struct device *dev; + int ret = 0; + u16 *buf; + + dev = &pf->pdev->dev; + + eeprom->magic = hw->vendor_id | (hw->device_id << 16); + + first_word = eeprom->offset >> 1; + last_word = (eeprom->offset + eeprom->len - 1) >> 1; + nwords = last_word - first_word + 1; + + buf = devm_kcalloc(dev, nwords, sizeof(u16), GFP_KERNEL); + if (!buf) + return -ENOMEM; + + status = ice_read_sr_buf(hw, first_word, &nwords, buf); + if (status) { + dev_err(dev, "ice_read_sr_buf failed, err %d aq_err %d\n", + status, hw->adminq.sq_last_status); + eeprom->len = sizeof(u16) * nwords; + ret = -EIO; + goto out; + } + + memcpy(bytes, (u8 *)buf + (eeprom->offset & 1), eeprom->len); +out: + devm_kfree(dev, buf); + return ret; +} + static void ice_get_strings(struct net_device *netdev, u32 stringset, u8 *data) { struct ice_netdev_priv *np = netdev_priv(netdev); @@ -1699,6 +1748,8 @@ static const struct ethtool_ops ice_ethtool_ops = { .get_msglevel = ice_get_msglevel, .set_msglevel = ice_set_msglevel, .get_link = ethtool_op_get_link, + .get_eeprom_len = ice_get_eeprom_len, + .get_eeprom = ice_get_eeprom, .get_strings = ice_get_strings, .set_phys_id = ice_set_phys_id, .get_ethtool_stats = ice_get_ethtool_stats, diff --git a/drivers/net/ethernet/intel/ice/ice_nvm.c b/drivers/net/ethernet/intel/ice/ice_nvm.c index 3274c543283c..ce64cecdae9c 100644 --- a/drivers/net/ethernet/intel/ice/ice_nvm.c +++ b/drivers/net/ethernet/intel/ice/ice_nvm.c @@ -124,6 +124,62 @@ ice_read_sr_word_aq(struct ice_hw *hw, u16 offset, u16 *data) return status; } +/** + * ice_read_sr_buf_aq - Reads Shadow RAM buf via AQ + * @hw: pointer to the HW structure + * @offset: offset of the Shadow RAM word to read (0x000000 - 0x001FFF) + * @words: (in) number of words to read; (out) number of words actually read + * @data: words read from the Shadow RAM + * + * Reads 16 bit words (data buf) from the SR using the ice_read_sr_aq + * method. Ownership of the NVM is taken before reading the buffer and later + * released. + */ +static enum ice_status +ice_read_sr_buf_aq(struct ice_hw *hw, u16 offset, u16 *words, u16 *data) +{ + enum ice_status status; + bool last_cmd = false; + u16 words_read = 0; + u16 i = 0; + + do { + u16 read_size, off_w; + + /* Calculate number of bytes we should read in this step. + * It's not allowed to read more than one page at a time or + * to cross page boundaries. + */ + off_w = offset % ICE_SR_SECTOR_SIZE_IN_WORDS; + read_size = off_w ? + min(*words, + (u16)(ICE_SR_SECTOR_SIZE_IN_WORDS - off_w)) : + min((*words - words_read), ICE_SR_SECTOR_SIZE_IN_WORDS); + + /* Check if this is last command, if so set proper flag */ + if ((words_read + read_size) >= *words) + last_cmd = true; + + status = ice_read_sr_aq(hw, offset, read_size, + data + words_read, last_cmd); + if (status) + goto read_nvm_buf_aq_exit; + + /* Increment counter for words already read and move offset to + * new read location + */ + words_read += read_size; + offset += read_size; + } while (words_read < *words); + + for (i = 0; i < *words; i++) + data[i] = le16_to_cpu(((__le16 *)data)[i]); + +read_nvm_buf_aq_exit: + *words = words_read; + return status; +} + /** * ice_acquire_nvm - Generic request for acquiring the NVM ownership * @hw: pointer to the HW structure @@ -234,3 +290,28 @@ enum ice_status ice_init_nvm(struct ice_hw *hw) return status; } + +/** + * ice_read_sr_buf - Reads Shadow RAM buf and acquire lock if necessary + * @hw: pointer to the HW structure + * @offset: offset of the Shadow RAM word to read (0x000000 - 0x001FFF) + * @words: (in) number of words to read; (out) number of words actually read + * @data: words read from the Shadow RAM + * + * Reads 16 bit words (data buf) from the SR using the ice_read_nvm_buf_aq + * method. The buf read is preceded by the NVM ownership take + * and followed by the release. + */ +enum ice_status +ice_read_sr_buf(struct ice_hw *hw, u16 offset, u16 *words, u16 *data) +{ + enum ice_status status; + + status = ice_acquire_nvm(hw, ICE_RES_READ); + if (!status) { + status = ice_read_sr_buf_aq(hw, offset, words, data); + ice_release_nvm(hw); + } + + return status; +}