diff options
Diffstat (limited to 'drivers/net/ethernet/cavium/thunder/thunder_bgx.c')
| -rw-r--r-- | drivers/net/ethernet/cavium/thunder/thunder_bgx.c | 108 |
1 files changed, 96 insertions, 12 deletions
diff --git a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c index 2f85b64f01fa..1e4695270da6 100644 --- a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c +++ b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c @@ -31,6 +31,7 @@ struct lmac { u8 lmac_type; u8 lane_to_sds; bool use_training; + bool autoneg; bool link_up; int lmacid; /* ID within BGX */ int lmacid_bd; /* ID on board */ @@ -461,7 +462,17 @@ static int bgx_lmac_sgmii_init(struct bgx *bgx, struct lmac *lmac) /* power down, reset autoneg, autoneg enable */ cfg = bgx_reg_read(bgx, lmacid, BGX_GMP_PCS_MRX_CTL); cfg &= ~PCS_MRX_CTL_PWR_DN; - cfg |= (PCS_MRX_CTL_RST_AN | PCS_MRX_CTL_AN_EN); + cfg |= PCS_MRX_CTL_RST_AN; + if (lmac->phydev) { + cfg |= PCS_MRX_CTL_AN_EN; + } else { + /* In scenarios where PHY driver is not present or it's a + * non-standard PHY, FW sets AN_EN to inform Linux driver + * to do auto-neg and link polling or not. + */ + if (cfg & PCS_MRX_CTL_AN_EN) + lmac->autoneg = true; + } bgx_reg_write(bgx, lmacid, BGX_GMP_PCS_MRX_CTL, cfg); if (lmac->lmac_type == BGX_MODE_QSGMII) { @@ -472,7 +483,7 @@ static int bgx_lmac_sgmii_init(struct bgx *bgx, struct lmac *lmac) return 0; } - if (lmac->lmac_type == BGX_MODE_SGMII) { + if ((lmac->lmac_type == BGX_MODE_SGMII) && lmac->phydev) { if (bgx_poll_reg(bgx, lmacid, BGX_GMP_PCS_MRX_STATUS, PCS_MRX_STATUS_AN_CPT, false)) { dev_err(&bgx->pdev->dev, "BGX AN_CPT not completed\n"); @@ -678,12 +689,71 @@ static int bgx_xaui_check_link(struct lmac *lmac) return -1; } +static void bgx_poll_for_sgmii_link(struct lmac *lmac) +{ + u64 pcs_link, an_result; + u8 speed; + + pcs_link = bgx_reg_read(lmac->bgx, lmac->lmacid, + BGX_GMP_PCS_MRX_STATUS); + + /*Link state bit is sticky, read it again*/ + if (!(pcs_link & PCS_MRX_STATUS_LINK)) + pcs_link = bgx_reg_read(lmac->bgx, lmac->lmacid, + BGX_GMP_PCS_MRX_STATUS); + + if (bgx_poll_reg(lmac->bgx, lmac->lmacid, BGX_GMP_PCS_MRX_STATUS, + PCS_MRX_STATUS_AN_CPT, false)) { + lmac->link_up = false; + lmac->last_speed = SPEED_UNKNOWN; + lmac->last_duplex = DUPLEX_UNKNOWN; + goto next_poll; + } + + lmac->link_up = ((pcs_link & PCS_MRX_STATUS_LINK) != 0) ? true : false; + an_result = bgx_reg_read(lmac->bgx, lmac->lmacid, + BGX_GMP_PCS_ANX_AN_RESULTS); + + speed = (an_result >> 3) & 0x3; + lmac->last_duplex = (an_result >> 1) & 0x1; + switch (speed) { + case 0: + lmac->last_speed = 10; + break; + case 1: + lmac->last_speed = 100; + break; + case 2: + lmac->last_speed = 1000; + break; + default: + lmac->link_up = false; + lmac->last_speed = SPEED_UNKNOWN; + lmac->last_duplex = DUPLEX_UNKNOWN; + break; + } + +next_poll: + + if (lmac->last_link != lmac->link_up) { + if (lmac->link_up) + bgx_sgmii_change_link_state(lmac); + lmac->last_link = lmac->link_up; + } + + queue_delayed_work(lmac->check_link, &lmac->dwork, HZ * 3); +} + static void bgx_poll_for_link(struct work_struct *work) { struct lmac *lmac; u64 spu_link, smu_link; lmac = container_of(work, struct lmac, dwork.work); + if (lmac->is_sgmii) { + bgx_poll_for_sgmii_link(lmac); + return; + } /* Receive link is latching low. Force it high and verify it */ bgx_reg_modify(lmac->bgx, lmac->lmacid, @@ -775,9 +845,21 @@ static int bgx_lmac_enable(struct bgx *bgx, u8 lmacid) (lmac->lmac_type != BGX_MODE_XLAUI) && (lmac->lmac_type != BGX_MODE_40G_KR) && (lmac->lmac_type != BGX_MODE_10G_KR)) { - if (!lmac->phydev) - return -ENODEV; - + if (!lmac->phydev) { + if (lmac->autoneg) { + bgx_reg_write(bgx, lmacid, + BGX_GMP_PCS_LINKX_TIMER, + PCS_LINKX_TIMER_COUNT); + goto poll; + } else { + /* Default to below link speed and duplex */ + lmac->link_up = true; + lmac->last_speed = 1000; + lmac->last_duplex = 1; + bgx_sgmii_change_link_state(lmac); + return 0; + } + } lmac->phydev->dev_flags = 0; if (phy_connect_direct(&lmac->netdev, lmac->phydev, @@ -786,15 +868,17 @@ static int bgx_lmac_enable(struct bgx *bgx, u8 lmacid) return -ENODEV; phy_start_aneg(lmac->phydev); - } else { - lmac->check_link = alloc_workqueue("check_link", WQ_UNBOUND | - WQ_MEM_RECLAIM, 1); - if (!lmac->check_link) - return -ENOMEM; - INIT_DELAYED_WORK(&lmac->dwork, bgx_poll_for_link); - queue_delayed_work(lmac->check_link, &lmac->dwork, 0); + return 0; } +poll: + lmac->check_link = alloc_workqueue("check_link", WQ_UNBOUND | + WQ_MEM_RECLAIM, 1); + if (!lmac->check_link) + return -ENOMEM; + INIT_DELAYED_WORK(&lmac->dwork, bgx_poll_for_link); + queue_delayed_work(lmac->check_link, &lmac->dwork, 0); + return 0; } |