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GET /api/patches/117867/?format=api
HTTP 200 OK
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Content-Type: application/json
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{
    "id": 117867,
    "url": "https://patches.dpdk.org/api/patches/117867/?format=api",
    "web_url": "https://patches.dpdk.org/project/dpdk/patch/20221010214720.766459-1-mpiszczek@ddn.com/",
    "project": {
        "id": 1,
        "url": "https://patches.dpdk.org/api/projects/1/?format=api",
        "name": "DPDK",
        "link_name": "dpdk",
        "list_id": "dev.dpdk.org",
        "list_email": "dev@dpdk.org",
        "web_url": "http://core.dpdk.org",
        "scm_url": "git://dpdk.org/dpdk",
        "webscm_url": "http://git.dpdk.org/dpdk",
        "list_archive_url": "https://inbox.dpdk.org/dev",
        "list_archive_url_format": "https://inbox.dpdk.org/dev/{}",
        "commit_url_format": ""
    },
    "msgid": "<20221010214720.766459-1-mpiszczek@ddn.com>",
    "list_archive_url": "https://inbox.dpdk.org/dev/20221010214720.766459-1-mpiszczek@ddn.com",
    "date": "2022-10-10T21:47:19",
    "name": "[v3] pci: read amd iommu virtual address width",
    "commit_ref": null,
    "pull_url": null,
    "state": "superseded",
    "archived": true,
    "hash": "22b1ed0780bd29977aa0a96fc4a509a946a2b08c",
    "submitter": {
        "id": 2840,
        "url": "https://patches.dpdk.org/api/people/2840/?format=api",
        "name": "Michael Piszczek",
        "email": "mpiszczek@ddn.com"
    },
    "delegate": {
        "id": 1,
        "url": "https://patches.dpdk.org/api/users/1/?format=api",
        "username": "tmonjalo",
        "first_name": "Thomas",
        "last_name": "Monjalon",
        "email": "thomas@monjalon.net"
    },
    "mbox": "https://patches.dpdk.org/project/dpdk/patch/20221010214720.766459-1-mpiszczek@ddn.com/mbox/",
    "series": [
        {
            "id": 25127,
            "url": "https://patches.dpdk.org/api/series/25127/?format=api",
            "web_url": "https://patches.dpdk.org/project/dpdk/list/?series=25127",
            "date": "2022-10-10T21:47:19",
            "name": "[v3] pci: read amd iommu virtual address width",
            "version": 3,
            "mbox": "https://patches.dpdk.org/series/25127/mbox/"
        }
    ],
    "comments": "https://patches.dpdk.org/api/patches/117867/comments/",
    "check": "fail",
    "checks": "https://patches.dpdk.org/api/patches/117867/checks/",
    "tags": {},
    "related": [],
    "headers": {
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        "From": "Michael Piszczek <mpiszczek@ddn.com>",
        "To": "dev@dpdk.org",
        "Cc": "Vipin.Varghese@amd.com,\n\tMichael Piszczek <mpiszczek@ddn.com>",
        "Subject": "[PATCH v3] pci: read amd iommu virtual address width",
        "Date": "Mon, 10 Oct 2022 23:47:19 +0200",
        "Message-Id": "<20221010214720.766459-1-mpiszczek@ddn.com>",
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    },
    "content": "Add code to read the virtual address width for AMD processors.\n\nSigned-off-by: Michael Piszczek <mpiszczek@ddn.com>\n---\n drivers/bus/pci/linux/pci.c | 47 +++++++++++++++++++++++--------------\n 1 file changed, 30 insertions(+), 17 deletions(-)",
    "diff": "diff --git a/drivers/bus/pci/linux/pci.c b/drivers/bus/pci/linux/pci.c\nindex e521459870..8c6082ee7a 100644\n--- a/drivers/bus/pci/linux/pci.c\n+++ b/drivers/bus/pci/linux/pci.c\n@@ -492,15 +492,18 @@ rte_pci_scan(void)\n }\n \n #if defined(RTE_ARCH_X86)\n+\n bool\n pci_device_iommu_support_va(const struct rte_pci_device *dev)\n {\n #define VTD_CAP_MGAW_SHIFT\t16\n #define VTD_CAP_MGAW_MASK\t(0x3fULL << VTD_CAP_MGAW_SHIFT)\n+#define RD_AMD_CAP_VASIZE_SHIFT 15\n+#define RD_AMD_CAP_VASIZE_MASK  (0x7F << RD_AMD_CAP_VASIZE_SHIFT)\n \tconst struct rte_pci_addr *addr = &dev->addr;\n \tchar filename[PATH_MAX];\n \tFILE *fp;\n-\tuint64_t mgaw, vtd_cap_reg = 0;\n+\tuint64_t mgaw, cap_reg = 0;\n \n \tsnprintf(filename, sizeof(filename),\n \t\t \"%s/\" PCI_PRI_FMT \"/iommu/intel-iommu/cap\",\n@@ -508,26 +511,36 @@ pci_device_iommu_support_va(const struct rte_pci_device *dev)\n \t\t addr->function);\n \n \tfp = fopen(filename, \"r\");\n-\tif (fp == NULL) {\n-\t\t/* We don't have an Intel IOMMU, assume VA supported */\n-\t\tif (errno == ENOENT)\n-\t\t\treturn true;\n-\n-\t\tRTE_LOG(ERR, EAL, \"%s(): can't open %s: %s\\n\",\n-\t\t\t__func__, filename, strerror(errno));\n-\t\treturn false;\n-\t}\n+\tif (fp != NULL) {\n+\t\t/* We have an Intel IOMMU */\n+\t\tif (fscanf(fp, \"%\" PRIx64, &cap_reg) != 1) {\n+\t\t\t   RTE_LOG(ERR, EAL, \"%s(): can't read %s\\n\", __func__, filename);\n+\t\t\tfclose(fp);\n+\t\t\treturn false;\n+\t\t}\n \n-\t/* We have an Intel IOMMU */\n-\tif (fscanf(fp, \"%\" PRIx64, &vtd_cap_reg) != 1) {\n-\t\tRTE_LOG(ERR, EAL, \"%s(): can't read %s\\n\", __func__, filename);\n \t\tfclose(fp);\n-\t\treturn false;\n+\t\tmgaw = ((cap_reg & VTD_CAP_MGAW_MASK) >> VTD_CAP_MGAW_SHIFT) + 1;\n \t}\n+\telse {\n+\t\tsnprintf(filename, sizeof(filename),\n+\t\t\t \"%s/\" PCI_PRI_FMT \"/iommu/amd-iommu/cap\",\n+\t\t\t  rte_pci_get_sysfs_path(), addr->domain, addr->bus, addr->devid,\n+\t\t\t  addr->function);\n+\n+\t\tfp = fopen(filename, \"r\");\n+\t\tif (fp != NULL) {\n+\t\t\t/* We have an Amd IOMMU */\n+\t\t\tif (fscanf(fp, \"%\" PRIx64, &cap_reg) != 1) {\n+\t\t\t\t   RTE_LOG(ERR, EAL, \"%s(): can't read %s\\n\", __func__, filename);\n+\t\t\t\tfclose(fp);\n+\t\t\t\treturn false;\n+\t\t\t}\n \n-\tfclose(fp);\n-\n-\tmgaw = ((vtd_cap_reg & VTD_CAP_MGAW_MASK) >> VTD_CAP_MGAW_SHIFT) + 1;\n+\t\t\tfclose(fp);\n+\t\t\tmgaw = ((cap_reg & RD_AMD_CAP_VASIZE_MASK) >> RD_AMD_CAP_VASIZE_SHIFT) + 1;\n+\t\t}\n+\t}\n \n \t/*\n \t * Assuming there is no limitation by now. We can not know at this point\n",
    "prefixes": [
        "v3"
    ]
}