Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751820AbbHGIJ1 (ORCPT ); Fri, 7 Aug 2015 04:09:27 -0400 Received: from mail-lb0-f182.google.com ([209.85.217.182]:33179 "EHLO mail-lb0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751745AbbHGIJK (ORCPT ); Fri, 7 Aug 2015 04:09:10 -0400 Message-ID: <55C467A0.4020601@linaro.org> Date: Fri, 07 Aug 2015 10:09:04 +0200 From: Tomasz Nowicki User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Firefox/31.0 Thunderbird/31.8.0 MIME-Version: 1.0 To: David Daney , linux-kernel@vger.kernel.org CC: netdev@vger.kernel.org, "David S. Miller" , linux-mips@linux-mips.org, Robert Richter , Sunil Goutham , linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org, David Daney Subject: Re: [PATCH 2/2] net, thunder, bgx: Add support for ACPI binding. References: <1438907590-29649-1-git-send-email-ddaney.cavm@gmail.com> <1438907590-29649-3-git-send-email-ddaney.cavm@gmail.com> In-Reply-To: <1438907590-29649-3-git-send-email-ddaney.cavm@gmail.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6069 Lines: 218 On 07.08.2015 02:33, David Daney wrote: > From: David Daney > > Find out which PHYs belong to which BGX instance in the ACPI way. > > Set the MAC address of the device as provided by ACPI tables. This is > similar to the implementation for devicetree in > of_get_mac_address(). The table is searched for the device property > entries "mac-address", "local-mac-address" and "address" in that > order. The address is provided in a u64 variable and must contain a > valid 6 bytes-len mac addr. > > Based on code from: Narinder Dhillon > Tomasz Nowicki > Robert Richter > > Signed-off-by: Tomasz Nowicki > Signed-off-by: Robert Richter > Signed-off-by: David Daney > --- > drivers/net/ethernet/cavium/thunder/thunder_bgx.c | 137 +++++++++++++++++++++- > 1 file changed, 135 insertions(+), 2 deletions(-) > > diff --git a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c > index 615b2af..2056583 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 > #include > #include > #include > @@ -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 +836,133 @@ static void bgx_get_qlm_mode(struct bgx *bgx) > } > } > > +#ifdef CONFIG_ACPI > + > +static int bgx_match_phy_id(struct device *dev, void *data) > +{ > + struct phy_device *phydev = to_phy_device(dev); > + u32 *phy_id = data; > + > + if (phydev->addr == *phy_id) > + return 1; > + > + return 0; > +} > + > +static const char * const addr_propnames[] = { > + "mac-address", > + "local-mac-address", > + "address", > +}; > + > +static int acpi_get_mac_address(struct acpi_device *adev, u8 *dst) > +{ > + const union acpi_object *prop; > + u64 mac_val; > + u8 mac[ETH_ALEN]; > + int i, j; > + int ret; > + > + for (i = 0; i < ARRAY_SIZE(addr_propnames); i++) { > + ret = acpi_dev_get_property(adev, addr_propnames[i], > + ACPI_TYPE_INTEGER, &prop); > + if (ret) > + continue; > + > + mac_val = prop->integer.value; > + > + if (mac_val & (~0ULL << 48)) > + continue; /* more than 6 bytes */ > + > + for (j = 0; j < ARRAY_SIZE(mac); j++) > + mac[j] = (u8)(mac_val >> (8 * j)); > + if (!is_valid_ether_addr(mac)) > + continue; > + > + memcpy(dst, mac, ETH_ALEN); > + > + return 0; > + } > + > + return ret ? ret : -EINVAL; > +} > + > +static acpi_status bgx_acpi_register_phy(acpi_handle handle, > + u32 lvl, void *context, void **rv) > +{ > + struct acpi_reference_args args; > + const union acpi_object *prop; > + struct bgx *bgx = context; > + struct acpi_device *adev; > + struct device *phy_dev; > + u32 phy_id; > + > + if (acpi_bus_get_device(handle, &adev)) > + goto out; > + > + SET_NETDEV_DEV(&bgx->lmac[bgx->lmac_count].netdev, &bgx->pdev->dev); > + > + acpi_get_mac_address(adev, bgx->lmac[bgx->lmac_count].mac); > + > + bgx->lmac[bgx->lmac_count].lmacid = bgx->lmac_count; > + > + if (acpi_dev_get_property_reference(adev, "phy-handle", 0, &args)) > + goto out; > + > + if (acpi_dev_get_property(args.adev, "phy-channel", ACPI_TYPE_INTEGER, &prop)) > + goto out; > + > + phy_id = prop->integer.value; > + > + phy_dev = bus_find_device(&mdio_bus_type, NULL, (void *)&phy_id, > + bgx_match_phy_id); > + if (!phy_dev) > + goto out; > + > + bgx->lmac[bgx->lmac_count].phydev = to_phy_device(phy_dev); > +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) > @@ -882,7 +1010,12 @@ static int bgx_init_of_phy(struct bgx *bgx) > > static int bgx_init_phy(struct bgx *bgx) > { > - return bgx_init_of_phy(bgx); > + int err = bgx_init_of_phy(bgx); > + > + if (err != -ENODEV) > + return err; > + > + return bgx_init_acpi_phy(bgx); > } > If kernel can work with DT and ACPI (both compiled in), it should take only one path instead of probing DT and ACPI sequentially. How about: @@ -902,10 +925,9 @@ 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 = acpi_disabled ? bgx_init_of_phy(bgx) : bgx_init_acpi_phy(bgx); + if (err) + goto err_enable; bgx_init_hw(bgx); Regards, Tomasz -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/