diff options
author | David Daney <david.daney@cavium.com> | 2015-08-11 03:58:37 +0300 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2015-08-11 21:47:57 +0300 |
commit | 46b903a01c053d0c94975ea7a6819618f121d3d6 (patch) | |
tree | 4583ce75dfd7b64e32a0ba68ec3f237e34801b43 /drivers/net | |
parent | de387e1156c76b273529f1803c6bd87b61eac2c5 (diff) | |
download | linux-46b903a01c053d0c94975ea7a6819618f121d3d6.tar.xz |
net, thunder, bgx: Add support to get MAC address from ACPI.
Currently there is no way to get the MAC address in a firmware
independent manner, so set the MAC address of the device directly from
the ACPI tables.
The binding agrees with the proposed standard here:
http://www.uefi.org/sites/default/files/resources/nic-request-v2.pdf
Based on code from: Narinder Dhillon <ndhillon@cavium.com>
Tomasz Nowicki <tomasz.nowicki@linaro.org>
Robert Richter <rrichter@cavium.com>
Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org>
Signed-off-by: Robert Richter <rrichter@cavium.com>
Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r-- | drivers/net/ethernet/cavium/thunder/thunder_bgx.c | 86 |
1 files changed, 85 insertions, 1 deletions
diff --git a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c index 615b2af3f374..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 */ @@ -835,6 +836,86 @@ static void bgx_get_qlm_mode(struct bgx *bgx) } } +#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) @@ -882,6 +963,9 @@ static int bgx_init_of_phy(struct bgx *bgx) static int bgx_init_phy(struct bgx *bgx) { + if (!acpi_disabled) + return bgx_init_acpi_phy(bgx); + return bgx_init_of_phy(bgx); } |