From patchwork Fri Jan 5 16:45:52 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Bryant G. Ly" X-Patchwork-Id: 10146773 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 6801A6034B for ; Fri, 5 Jan 2018 16:47:05 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 540AC28537 for ; Fri, 5 Jan 2018 16:47:05 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 48C6A28604; Fri, 5 Jan 2018 16:47:05 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A817928537 for ; Fri, 5 Jan 2018 16:47:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752402AbeAEQrC (ORCPT ); Fri, 5 Jan 2018 11:47:02 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:33788 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752392AbeAEQqz (ORCPT ); Fri, 5 Jan 2018 11:46:55 -0500 Received: from pps.filterd (m0098421.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id w05Gic3t139771 for ; Fri, 5 Jan 2018 11:46:54 -0500 Received: from e16.ny.us.ibm.com (e16.ny.us.ibm.com [129.33.205.206]) by mx0a-001b2d01.pphosted.com with ESMTP id 2fad5603ac-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Fri, 05 Jan 2018 11:46:53 -0500 Received: from localhost by e16.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 5 Jan 2018 11:46:52 -0500 Received: from b01cxnp22036.gho.pok.ibm.com (9.57.198.26) by e16.ny.us.ibm.com (146.89.104.203) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Fri, 5 Jan 2018 11:46:48 -0500 Received: from b01ledav001.gho.pok.ibm.com (b01ledav001.gho.pok.ibm.com [9.57.199.106]) by b01cxnp22036.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w05GklZS46399652; Fri, 5 Jan 2018 16:46:47 GMT Received: from b01ledav001.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id EF7FB2803A; Fri, 5 Jan 2018 11:46:13 -0500 (EST) Received: from localhost.localdomain (unknown [9.85.199.208]) by b01ledav001.gho.pok.ibm.com (Postfix) with ESMTP id C046D2803F; Fri, 5 Jan 2018 11:46:12 -0500 (EST) From: "Bryant G. Ly" To: benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au Cc: seroyer@linux.vnet.ibm.com, jjalvare@linux.vnet.ibm.com, alex.williamson@redhat.com, helgaas@kernel.org, aik@ozlabs.ru, ruscur@russell.cc, linux-pci@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, bodong@mellanox.com, eli@mellanox.com, saeedm@mellanox.com, "Bryant G. Ly" Subject: [PATCH v4 7/7] pseries/setup: Add Initialization of VF Bars Date: Fri, 5 Jan 2018 10:45:52 -0600 X-Mailer: git-send-email 2.14.3 (Apple Git-98) In-Reply-To: <20180105164552.36371-1-bryantly@linux.vnet.ibm.com> References: <20180105164552.36371-1-bryantly@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18010516-0024-0000-0000-0000030C0967 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00008325; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000244; SDB=6.00970672; UDB=6.00491634; IPR=6.00750642; BA=6.00005765; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00018892; XFM=3.00000015; UTC=2018-01-05 16:46:51 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18010516-0025-0000-0000-00004685984B Message-Id: <20180105164552.36371-8-bryantly@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2018-01-05_08:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1801050235 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP When enabling SR-IOV in pseries platform, the VF bar properties for a PF are reported on the device node in the device tree. This patch adds the IOV Bar resources to Linux structures from the device tree for later use when configuring SR-IOV by PF driver. Signed-off-by: Bryant G. Ly Signed-off-by: Juan J. Alvarez --- arch/powerpc/include/asm/pci.h | 2 + arch/powerpc/kernel/pci_of_scan.c | 2 +- arch/powerpc/platforms/pseries/setup.c | 164 +++++++++++++++++++++++++++++++++ 3 files changed, 167 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/include/asm/pci.h b/arch/powerpc/include/asm/pci.h index 8dc32eacc97c..d82802ff5088 100644 --- a/arch/powerpc/include/asm/pci.h +++ b/arch/powerpc/include/asm/pci.h @@ -121,6 +121,8 @@ extern int remove_phb_dynamic(struct pci_controller *phb); extern struct pci_dev *of_create_pci_dev(struct device_node *node, struct pci_bus *bus, int devfn); +extern unsigned int pci_parse_of_flags(u32 addr0, int bridge); + extern void of_scan_pci_bridge(struct pci_dev *dev); extern void of_scan_bus(struct device_node *node, struct pci_bus *bus); diff --git a/arch/powerpc/kernel/pci_of_scan.c b/arch/powerpc/kernel/pci_of_scan.c index 0d790f8432d2..20ceec4a5f5e 100644 --- a/arch/powerpc/kernel/pci_of_scan.c +++ b/arch/powerpc/kernel/pci_of_scan.c @@ -38,7 +38,7 @@ static u32 get_int_prop(struct device_node *np, const char *name, u32 def) * @addr0: value of 1st cell of a device tree PCI address. * @bridge: Set this flag if the address is from a bridge 'ranges' property */ -static unsigned int pci_parse_of_flags(u32 addr0, int bridge) +unsigned int pci_parse_of_flags(u32 addr0, int bridge) { unsigned int flags = 0; diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c index 1d6e2de2445c..e8f523cb5526 100644 --- a/arch/powerpc/platforms/pseries/setup.c +++ b/arch/powerpc/platforms/pseries/setup.c @@ -459,6 +459,162 @@ static void __init find_and_init_phbs(void) of_pci_check_probe_only(); } +#ifdef CONFIG_PCI_IOV +enum rtas_iov_fw_value_map { + NUM_RES_PROPERTY = 0, /* Number of Resources */ + LOW_INT = 1, /* Lowest 32 bits of Address */ + START_OF_ENTRIES = 2, /* Always start of entry */ + APERTURE_PROPERTY = 2, /* Start of entry+ to Aperture Size */ + WDW_SIZE_PROPERTY = 4, /* Start of entry+ to Window Size */ + NEXT_ENTRY = 7 /* Go to next entry on array */ +}; + +enum get_iov_fw_value_index { + BAR_ADDRS = 1, /* Get Bar Address */ + APERTURE_SIZE = 2, /* Get Aperture Size */ + WDW_SIZE = 3 /* Get Window Size */ +}; + +resource_size_t pseries_get_iov_fw_value(struct pci_dev *dev, int resno, + enum get_iov_fw_value_index value) +{ + const int *indexes; + struct device_node *dn = pci_device_to_OF_node(dev); + int i, num_res, ret = 0; + + indexes = of_get_property(dn, "ibm,open-sriov-vf-bar-info", NULL); + if (!indexes) + return 0; + + /* + * First element in the array is the number of Bars + * returned. Search through the list to find the matching + * bar + */ + num_res = of_read_number(&indexes[NUM_RES_PROPERTY], 1); + if (resno >= num_res) + return 0; /* or an errror */ + + i = START_OF_ENTRIES + NEXT_ENTRY * resno; + switch (value) { + case BAR_ADDRS: + ret = of_read_number(&indexes[i], 2); + break; + case APERTURE_SIZE: + ret = of_read_number(&indexes[i + APERTURE_PROPERTY], 2); + break; + case WDW_SIZE: + ret = of_read_number(&indexes[i + WDW_SIZE_PROPERTY], 2); + break; + } + + return ret; +} + +void of_pci_set_vf_bar_size(struct pci_dev *dev, const int *indexes) +{ + struct resource *res; + resource_size_t base, size; + int i, r, num_res; + + num_res = of_read_number(&indexes[NUM_RES_PROPERTY], 1); + num_res = min_t(int, num_res, PCI_SRIOV_NUM_BARS); + for (i = START_OF_ENTRIES, r = 0; r < num_res && r < PCI_SRIOV_NUM_BARS; + i += NEXT_ENTRY, r++) { + res = &dev->resource[r + PCI_IOV_RESOURCES]; + base = of_read_number(&indexes[i], 2); + size = of_read_number(&indexes[i + APERTURE_PROPERTY], 2); + res->flags = pci_parse_of_flags(of_read_number + (&indexes[i + LOW_INT], 1), 0); + res->flags |= (IORESOURCE_MEM_64 | IORESOURCE_PCI_FIXED); + res->name = pci_name(dev); + res->start = base; + res->end = base + size - 1; + } +} + +void of_pci_parse_iov_addrs(struct pci_dev *dev, const int *indexes) +{ + struct resource *res, *root, *conflict; + resource_size_t base, size; + int i, r, num_res; + + /* + * First element in the array is the number of Bars + * returned. Search through the list to find the matching + * bars assign them from firmware into resources structure. + */ + num_res = of_read_number(&indexes[NUM_RES_PROPERTY], 1); + for (i = START_OF_ENTRIES, r = 0; r < num_res && r < PCI_SRIOV_NUM_BARS; + i += NEXT_ENTRY, r++) { + res = &dev->resource[r + PCI_IOV_RESOURCES]; + base = of_read_number(&indexes[i], 2); + size = of_read_number(&indexes[i + WDW_SIZE_PROPERTY], 2); + res->name = pci_name(dev); + res->start = base; + res->end = base + size - 1; + root = &iomem_resource; + dev_dbg(&dev->dev, + "pSeries IOV BAR %d: trying firmware assignment %pR\n", + r + PCI_IOV_RESOURCES, res); + conflict = request_resource_conflict(root, res); + if (conflict) { + dev_info(&dev->dev, + "BAR %d: %pR conflicts with %s %pR\n", + r + PCI_IOV_RESOURCES, res, + conflict->name, conflict); + res->flags |= IORESOURCE_UNSET; + } + } +} + +static void pseries_pci_fixup_resources(struct pci_dev *pdev) +{ + const int *indexes; + struct device_node *dn = pci_device_to_OF_node(pdev); + + /*Firmware must support open sriov otherwise dont configure*/ + indexes = of_get_property(dn, "ibm,open-sriov-vf-bar-info", NULL); + if (!indexes) + return; + /* Assign the addresses from device tree*/ + of_pci_set_vf_bar_size(pdev, indexes); +} + +static void pseries_pci_fixup_iov_resources(struct pci_dev *pdev) +{ + const int *indexes; + struct device_node *dn = pci_device_to_OF_node(pdev); + + if (!pdev->is_physfn || pdev->is_added) + return; + /*Firmware must support open sriov otherwise dont configure*/ + indexes = of_get_property(dn, "ibm,open-sriov-vf-bar-info", NULL); + if (!indexes) + return; + /* Assign the addresses from device tree*/ + of_pci_parse_iov_addrs(pdev, indexes); +} + +static resource_size_t pseries_pci_iov_resource_alignment(struct pci_dev *pdev, + int resno) +{ + const __be32 *reg; + struct device_node *dn = pci_device_to_OF_node(pdev); + + /*Firmware must support open sriov otherwise report regular alignment*/ + reg = of_get_property(dn, "ibm,is-open-sriov-pf", NULL); + if (!reg) + return pci_iov_resource_size(pdev, resno); + + if (!pdev->is_physfn) + return 0; + return pseries_get_iov_fw_value(pdev, + resno - PCI_IOV_RESOURCES, + APERTURE_SIZE); +} +#endif + static void __init pSeries_setup_arch(void) { set_arch_panic_timeout(10, ARCH_PANIC_TIMEOUT); @@ -490,6 +646,14 @@ static void __init pSeries_setup_arch(void) vpa_init(boot_cpuid); ppc_md.power_save = pseries_lpar_idle; ppc_md.enable_pmcs = pseries_lpar_enable_pmcs; +#ifdef CONFIG_PCI_IOV + ppc_md.pcibios_fixup_resources = + pseries_pci_fixup_resources; + ppc_md.pcibios_fixup_sriov = + pseries_pci_fixup_iov_resources; + ppc_md.pcibios_iov_resource_alignment = + pseries_pci_iov_resource_alignment; +#endif } else { /* No special idle routine */ ppc_md.enable_pmcs = power4_enable_pmcs;