diff options
| -rw-r--r-- | drivers/net/ethernet/cavium/thunder/thunder_bgx.c | 134 |
1 files changed, 120 insertions, 14 deletions
diff --git a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c index b961a89dc626..5e541862f65e 100644 --- a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c +++ b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c @@ -6,6 +6,7 @@ * as published by the Free Software Foundation. */ +#include <linux/acpi.h> #include <linux/module.h> #include <linux/interrupt.h> #include <linux/pci.h> @@ -26,7 +27,7 @@ struct lmac { struct bgx *bgx; int dmac; - unsigned char mac[ETH_ALEN]; + u8 mac[ETH_ALEN]; bool link_up; int lmacid; /* ID within BGX */ int lmacid_bd; /* ID on board */ @@ -835,18 +836,108 @@ static void bgx_get_qlm_mode(struct bgx *bgx) } } -static void bgx_init_of(struct bgx *bgx, struct device_node *np) +#ifdef CONFIG_ACPI + +static int acpi_get_mac_address(struct acpi_device *adev, u8 *dst) +{ + u8 mac[ETH_ALEN]; + int ret; + + ret = fwnode_property_read_u8_array(acpi_fwnode_handle(adev), + "mac-address", mac, ETH_ALEN); + if (ret) + goto out; + + if (!is_valid_ether_addr(mac)) { + ret = -EINVAL; + goto out; + } + + memcpy(dst, mac, ETH_ALEN); +out: + return ret; +} + +/* Currently only sets the MAC address. */ +static acpi_status bgx_acpi_register_phy(acpi_handle handle, + u32 lvl, void *context, void **rv) +{ + struct bgx *bgx = context; + struct acpi_device *adev; + + if (acpi_bus_get_device(handle, &adev)) + goto out; + + acpi_get_mac_address(adev, bgx->lmac[bgx->lmac_count].mac); + + SET_NETDEV_DEV(&bgx->lmac[bgx->lmac_count].netdev, &bgx->pdev->dev); + + bgx->lmac[bgx->lmac_count].lmacid = bgx->lmac_count; +out: + bgx->lmac_count++; + return AE_OK; +} + +static acpi_status bgx_acpi_match_id(acpi_handle handle, u32 lvl, + void *context, void **ret_val) +{ + struct acpi_buffer string = { ACPI_ALLOCATE_BUFFER, NULL }; + struct bgx *bgx = context; + char bgx_sel[5]; + + snprintf(bgx_sel, 5, "BGX%d", bgx->bgx_id); + if (ACPI_FAILURE(acpi_get_name(handle, ACPI_SINGLE_NAME, &string))) { + pr_warn("Invalid link device\n"); + return AE_OK; + } + + if (strncmp(string.pointer, bgx_sel, 4)) + return AE_OK; + + acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1, + bgx_acpi_register_phy, NULL, bgx, NULL); + + kfree(string.pointer); + return AE_CTRL_TERMINATE; +} + +static int bgx_init_acpi_phy(struct bgx *bgx) { + acpi_get_devices(NULL, bgx_acpi_match_id, bgx, (void **)NULL); + return 0; +} + +#else + +static int bgx_init_acpi_phy(struct bgx *bgx) +{ + return -ENODEV; +} + +#endif /* CONFIG_ACPI */ + +#if IS_ENABLED(CONFIG_OF_MDIO) + +static int bgx_init_of_phy(struct bgx *bgx) +{ + struct device_node *np; struct device_node *np_child; u8 lmac = 0; + char bgx_sel[5]; + const char *mac; - for_each_child_of_node(np, np_child) { - struct device_node *phy_np; - const char *mac; + /* Get BGX node from DT */ + snprintf(bgx_sel, 5, "bgx%d", bgx->bgx_id); + np = of_find_node_by_name(NULL, bgx_sel); + if (!np) + return -ENODEV; - phy_np = of_parse_phandle(np_child, "phy-handle", 0); - if (phy_np) - bgx->lmac[lmac].phydev = of_phy_find_device(phy_np); + for_each_child_of_node(np, np_child) { + struct device_node *phy_np = of_parse_phandle(np_child, + "phy-handle", 0); + if (!phy_np) + continue; + bgx->lmac[lmac].phydev = of_phy_find_device(phy_np); mac = of_get_mac_address(np_child); if (mac) @@ -858,6 +949,24 @@ static void bgx_init_of(struct bgx *bgx, struct device_node *np) if (lmac == MAX_LMAC_PER_BGX) break; } + return 0; +} + +#else + +static int bgx_init_of_phy(struct bgx *bgx) +{ + return -ENODEV; +} + +#endif /* CONFIG_OF_MDIO */ + +static int bgx_init_phy(struct bgx *bgx) +{ + if (!acpi_disabled) + return bgx_init_acpi_phy(bgx); + + return bgx_init_of_phy(bgx); } static int bgx_probe(struct pci_dev *pdev, const struct pci_device_id *ent) @@ -865,8 +974,6 @@ static int bgx_probe(struct pci_dev *pdev, const struct pci_device_id *ent) int err; struct device *dev = &pdev->dev; struct bgx *bgx = NULL; - struct device_node *np; - char bgx_sel[5]; u8 lmac; bgx = devm_kzalloc(dev, sizeof(*bgx), GFP_KERNEL); @@ -902,10 +1009,9 @@ static int bgx_probe(struct pci_dev *pdev, const struct pci_device_id *ent) bgx_vnic[bgx->bgx_id] = bgx; bgx_get_qlm_mode(bgx); - snprintf(bgx_sel, 5, "bgx%d", bgx->bgx_id); - np = of_find_node_by_name(NULL, bgx_sel); - if (np) - bgx_init_of(bgx, np); + err = bgx_init_phy(bgx); + if (err) + goto err_enable; bgx_init_hw(bgx); |