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@@ -0,0 +1,848 @@
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+#include "rte_config.h"
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+/* SPDX-License-Identifier: BSD-3-Clause
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+ * Copyright(c) 2010-2014 Intel Corporation
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+ */
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+
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+#include <string.h>
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+#include <dirent.h>
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+
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+#include <rte_log.h>
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+#include <rte_bus.h>
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+#include <rte_pci.h>
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+#include <rte_bus_pci.h>
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+#include <rte_malloc.h>
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+#include <rte_devargs.h>
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+#include <rte_memcpy.h>
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+#include <rte_vfio.h>
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+
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+#include "eal_filesystem.h"
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+
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+#include "private.h"
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+#include "pci_init.h"
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+
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+/**
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+ * @file
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+ * PCI probing under linux
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+ *
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+ * This code is used to simulate a PCI probe by parsing information in sysfs.
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+ * When a registered device matches a driver, it is then initialized with
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+ * IGB_UIO driver (or doesn't initialize, if the device wasn't bound to it).
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+ */
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+
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+extern struct rte_pci_bus rte_pci_bus;
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+
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+static int
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+pci_get_kernel_driver_by_path(const char *filename, char *dri_name,
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+ size_t len)
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+{
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+ int count;
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+ char path[PATH_MAX];
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+ char *name;
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+
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+ if (!filename || !dri_name)
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+ return -1;
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+
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+ count = readlink(filename, path, PATH_MAX);
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+ if (count >= PATH_MAX)
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+ return -1;
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+
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+ /* For device does not have a driver */
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+ if (count < 0)
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+ return 1;
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+
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+ path[count] = '\0';
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+
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+ name = strrchr(path, '/');
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+ if (name) {
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+ strlcpy(dri_name, name + 1, len);
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+ return 0;
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+ }
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+
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+ return -1;
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+}
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+
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+/* Map pci device */
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+int
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+rte_pci_map_device(struct rte_pci_device *dev)
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+{
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+ int ret = -1;
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+
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+ /* try mapping the NIC resources using VFIO if it exists */
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+ switch (dev->kdrv) {
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+ case RTE_PCI_KDRV_VFIO:
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+#ifdef VFIO_PRESENT
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+ if (pci_vfio_is_enabled())
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+ ret = pci_vfio_map_resource(dev);
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+#endif
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+ break;
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+ case RTE_PCI_KDRV_IGB_UIO:
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+ case RTE_PCI_KDRV_UIO_GENERIC:
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+ if (rte_eal_using_phys_addrs()) {
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+ /* map resources for devices that use uio */
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+ ret = pci_uio_map_resource(dev);
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+ }
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+ break;
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+ default:
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+ RTE_LOG(DEBUG, EAL,
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+ " Not managed by a supported kernel driver, skipped\n");
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+ ret = 1;
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+ break;
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+ }
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+
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+ return ret;
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+}
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+
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+/* Unmap pci device */
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+void
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+rte_pci_unmap_device(struct rte_pci_device *dev)
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+{
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+ /* try unmapping the NIC resources using VFIO if it exists */
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+ switch (dev->kdrv) {
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+ case RTE_PCI_KDRV_VFIO:
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+#ifdef VFIO_PRESENT
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+ if (pci_vfio_is_enabled())
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+ pci_vfio_unmap_resource(dev);
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+#endif
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+ break;
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+ case RTE_PCI_KDRV_IGB_UIO:
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+ case RTE_PCI_KDRV_UIO_GENERIC:
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+ /* unmap resources for devices that use uio */
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+ pci_uio_unmap_resource(dev);
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+ break;
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+ default:
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+ RTE_LOG(DEBUG, EAL,
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+ " Not managed by a supported kernel driver, skipped\n");
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+ break;
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+ }
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+}
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+
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+static int
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+find_max_end_va(const struct rte_memseg_list *msl, void *arg)
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+{
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+ size_t sz = msl->len;
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+ void *end_va = RTE_PTR_ADD(msl->base_va, sz);
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+ void **max_va = arg;
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+
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+ if (*max_va < end_va)
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+ *max_va = end_va;
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+ return 0;
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+}
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+
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+void *
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+pci_find_max_end_va(void)
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+{
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+ void *va = NULL;
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+
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+ rte_memseg_list_walk(find_max_end_va, &va);
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+ return va;
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+}
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+
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+
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+/* parse one line of the "resource" sysfs file (note that the 'line'
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+ * string is modified)
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+ */
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+int
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+pci_parse_one_sysfs_resource(char *line, size_t len, uint64_t *phys_addr,
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+ uint64_t *end_addr, uint64_t *flags)
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+{
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+ union pci_resource_info {
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+ struct {
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+ char *phys_addr;
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+ char *end_addr;
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+ char *flags;
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+ };
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+ char *ptrs[PCI_RESOURCE_FMT_NVAL];
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+ } res_info;
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+
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+ if (rte_strsplit(line, len, res_info.ptrs, 3, ' ') != 3) {
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+ RTE_LOG(ERR, EAL,
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+ "%s(): bad resource format\n", __func__);
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+ return -1;
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+ }
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+ errno = 0;
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+ *phys_addr = strtoull(res_info.phys_addr, NULL, 16);
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+ *end_addr = strtoull(res_info.end_addr, NULL, 16);
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+ *flags = strtoull(res_info.flags, NULL, 16);
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+ if (errno != 0) {
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+ RTE_LOG(ERR, EAL,
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+ "%s(): bad resource format\n", __func__);
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+ return -1;
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+ }
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+
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+ return 0;
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+}
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+
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+/* parse the "resource" sysfs file */
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+static int
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+pci_parse_sysfs_resource(const char *filename, struct rte_pci_device *dev)
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+{
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+ FILE *f;
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+ char buf[BUFSIZ];
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+ int i;
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+ uint64_t phys_addr, end_addr, flags;
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+
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+ f = fopen(filename, "r");
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+ if (f == NULL) {
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+ RTE_LOG(ERR, EAL, "Cannot open sysfs resource\n");
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+ return -1;
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+ }
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+
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+ for (i = 0; i<PCI_MAX_RESOURCE; i++) {
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+
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+ if (fgets(buf, sizeof(buf), f) == NULL) {
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+ RTE_LOG(ERR, EAL,
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+ "%s(): cannot read resource\n", __func__);
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+ goto error;
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+ }
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+ if (pci_parse_one_sysfs_resource(buf, sizeof(buf), &phys_addr,
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+ &end_addr, &flags) < 0)
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+ goto error;
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+
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+ if (flags & IORESOURCE_MEM) {
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+ dev->mem_resource[i].phys_addr = phys_addr;
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+ dev->mem_resource[i].len = end_addr - phys_addr + 1;
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+ /* not mapped for now */
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+ dev->mem_resource[i].addr = NULL;
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+ }
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+ }
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+ fclose(f);
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+ return 0;
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+
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+error:
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+ fclose(f);
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+ return -1;
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+}
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+
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+/* Scan one pci sysfs entry, and fill the devices list from it. */
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+static int
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+pci_scan_one(const char *dirname, const struct rte_pci_addr *addr)
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+{
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+ char filename[PATH_MAX];
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+ unsigned long tmp;
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+ struct rte_pci_device *dev;
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+ char driver[PATH_MAX];
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+ int ret;
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+
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+ dev = malloc(sizeof(*dev));
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+ if (dev == NULL)
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+ return -1;
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+
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+ memset(dev, 0, sizeof(*dev));
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+ dev->device.bus = &rte_pci_bus.bus;
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+ dev->addr = *addr;
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+
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+ /* get vendor id */
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+ snprintf(filename, sizeof(filename), "%s/vendor", dirname);
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+ if (eal_parse_sysfs_value(filename, &tmp) < 0) {
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+ free(dev);
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+ return -1;
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+ }
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+ dev->id.vendor_id = (uint16_t)tmp;
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+
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+ /* get device id */
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+ snprintf(filename, sizeof(filename), "%s/device", dirname);
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+ if (eal_parse_sysfs_value(filename, &tmp) < 0) {
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+ free(dev);
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+ return -1;
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+ }
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+ dev->id.device_id = (uint16_t)tmp;
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+
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+ /* get subsystem_vendor id */
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+ snprintf(filename, sizeof(filename), "%s/subsystem_vendor",
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+ dirname);
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+ if (eal_parse_sysfs_value(filename, &tmp) < 0) {
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+ free(dev);
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+ return -1;
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+ }
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+ dev->id.subsystem_vendor_id = (uint16_t)tmp;
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+
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+ /* get subsystem_device id */
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+ snprintf(filename, sizeof(filename), "%s/subsystem_device",
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+ dirname);
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+ if (eal_parse_sysfs_value(filename, &tmp) < 0) {
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+ free(dev);
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+ return -1;
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+ }
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+ dev->id.subsystem_device_id = (uint16_t)tmp;
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+
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+ /* get class_id */
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+ snprintf(filename, sizeof(filename), "%s/class",
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+ dirname);
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+ if (eal_parse_sysfs_value(filename, &tmp) < 0) {
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+ free(dev);
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+ return -1;
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+ }
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+ /* the least 24 bits are valid: class, subclass, program interface */
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+ dev->id.class_id = (uint32_t)tmp & RTE_CLASS_ANY_ID;
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+
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+ /* get max_vfs */
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+ dev->max_vfs = 0;
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+ snprintf(filename, sizeof(filename), "%s/max_vfs", dirname);
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+ if (!access(filename, F_OK) &&
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+ eal_parse_sysfs_value(filename, &tmp) == 0)
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+ dev->max_vfs = (uint16_t)tmp;
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+ else {
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+ /* for non igb_uio driver, need kernel version >= 3.8 */
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+ snprintf(filename, sizeof(filename),
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+ "%s/sriov_numvfs", dirname);
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+ if (!access(filename, F_OK) &&
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+ eal_parse_sysfs_value(filename, &tmp) == 0)
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+ dev->max_vfs = (uint16_t)tmp;
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+ }
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+
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+ /* get numa node, default to 0 if not present */
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+ snprintf(filename, sizeof(filename), "%s/numa_node",
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+ dirname);
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+
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+ if (access(filename, F_OK) != -1) {
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+ if (eal_parse_sysfs_value(filename, &tmp) == 0)
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+ dev->device.numa_node = tmp;
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+ else
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+ dev->device.numa_node = -1;
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+ } else {
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+ dev->device.numa_node = 0;
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+ }
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+
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+ pci_name_set(dev);
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+
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+ /* parse resources */
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+ snprintf(filename, sizeof(filename), "%s/resource", dirname);
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+ if (pci_parse_sysfs_resource(filename, dev) < 0) {
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+ RTE_LOG(ERR, EAL, "%s(): cannot parse resource\n", __func__);
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+ free(dev);
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+ return -1;
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+ }
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+
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+ /* parse driver */
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+ snprintf(filename, sizeof(filename), "%s/driver", dirname);
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+ ret = pci_get_kernel_driver_by_path(filename, driver, sizeof(driver));
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+ if (ret < 0) {
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+ RTE_LOG(ERR, EAL, "Fail to get kernel driver\n");
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+ free(dev);
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+ return -1;
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+ }
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+
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+ if (!ret) {
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+ if (!strcmp(driver, "vfio-pci"))
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+ dev->kdrv = RTE_PCI_KDRV_VFIO;
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+ else if (!strcmp(driver, "igb_uio"))
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+ dev->kdrv = RTE_PCI_KDRV_IGB_UIO;
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+ else if (!strcmp(driver, "uio_pci_generic"))
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+ dev->kdrv = RTE_PCI_KDRV_UIO_GENERIC;
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+ else
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+ dev->kdrv = RTE_PCI_KDRV_UNKNOWN;
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+ } else {
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+ dev->kdrv = RTE_PCI_KDRV_NONE;
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+ return 0;
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+ }
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+ /* device is valid, add in list (sorted) */
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+ if (TAILQ_EMPTY(&rte_pci_bus.device_list)) {
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+ rte_pci_add_device(dev);
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+ } else {
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+ struct rte_pci_device *dev2;
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+ int ret;
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+
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+ TAILQ_FOREACH(dev2, &rte_pci_bus.device_list, next) {
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+ ret = rte_pci_addr_cmp(&dev->addr, &dev2->addr);
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+ if (ret > 0)
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+ continue;
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+
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+ if (ret < 0) {
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+ rte_pci_insert_device(dev2, dev);
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+ } else { /* already registered */
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+ if (!rte_dev_is_probed(&dev2->device)) {
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+ dev2->kdrv = dev->kdrv;
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+ dev2->max_vfs = dev->max_vfs;
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+ dev2->id = dev->id;
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+ pci_name_set(dev2);
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+ memmove(dev2->mem_resource,
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+ dev->mem_resource,
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+ sizeof(dev->mem_resource));
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+ } else {
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+ /**
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+ * If device is plugged and driver is
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+ * probed already, (This happens when
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+ * we call rte_dev_probe which will
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+ * scan all device on the bus) we don't
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+ * need to do anything here unless...
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+ **/
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+ if (dev2->kdrv != dev->kdrv ||
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+ dev2->max_vfs != dev->max_vfs ||
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+ memcmp(&dev2->id, &dev->id, sizeof(dev2->id)))
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+ /*
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+ * This should not happens.
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+ * But it is still possible if
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+ * we unbind a device from
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+ * vfio or uio before hotplug
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+ * remove and rebind it with
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+ * a different configure.
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+ * So we just print out the
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+ * error as an alarm.
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+ */
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+ RTE_LOG(ERR, EAL, "Unexpected device scan at %s!\n",
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+ filename);
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+ else if (dev2->device.devargs !=
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+ dev->device.devargs) {
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+ rte_devargs_remove(dev2->device.devargs);
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+ pci_name_set(dev2);
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+ }
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+ }
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+ free(dev);
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+ }
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+ return 0;
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+ }
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+
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+ rte_pci_add_device(dev);
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+ }
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+
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+ return 0;
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+}
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+
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+/*
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+ * split up a pci address into its constituent parts.
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+ */
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+static int
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+parse_pci_addr_format(const char *buf, int bufsize, struct rte_pci_addr *addr)
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+{
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+ /* first split on ':' */
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+ union splitaddr {
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+ struct {
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+ char *domain;
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+ char *bus;
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+ char *devid;
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+ char *function;
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+ };
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+ char *str[PCI_FMT_NVAL]; /* last element-separator is "." not ":" */
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+ } splitaddr;
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+
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|
|
+ char *buf_copy = strndup(buf, bufsize);
|
|
|
+ if (buf_copy == NULL)
|
|
|
+ return -1;
|
|
|
+
|
|
|
+ if (rte_strsplit(buf_copy, bufsize, splitaddr.str, PCI_FMT_NVAL, ':')
|
|
|
+ != PCI_FMT_NVAL - 1)
|
|
|
+ goto error;
|
|
|
+ /* final split is on '.' between devid and function */
|
|
|
+ splitaddr.function = strchr(splitaddr.devid,'.');
|
|
|
+ if (splitaddr.function == NULL)
|
|
|
+ goto error;
|
|
|
+ *splitaddr.function++ = '\0';
|
|
|
+
|
|
|
+ /* now convert to int values */
|
|
|
+ errno = 0;
|
|
|
+ addr->domain = strtoul(splitaddr.domain, NULL, 16);
|
|
|
+ addr->bus = strtoul(splitaddr.bus, NULL, 16);
|
|
|
+ addr->devid = strtoul(splitaddr.devid, NULL, 16);
|
|
|
+ addr->function = strtoul(splitaddr.function, NULL, 10);
|
|
|
+ if (errno != 0)
|
|
|
+ goto error;
|
|
|
+
|
|
|
+ free(buf_copy); /* free the copy made with strdup */
|
|
|
+ return 0;
|
|
|
+error:
|
|
|
+ free(buf_copy);
|
|
|
+ return -1;
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * Scan the content of the PCI bus, and the devices in the devices
|
|
|
+ * list
|
|
|
+ */
|
|
|
+int
|
|
|
+rte_pci_scan(void)
|
|
|
+{
|
|
|
+ struct dirent *e;
|
|
|
+ DIR *dir;
|
|
|
+ char dirname[PATH_MAX];
|
|
|
+ struct rte_pci_addr addr;
|
|
|
+
|
|
|
+ /* for debug purposes, PCI can be disabled */
|
|
|
+ if (!rte_eal_has_pci())
|
|
|
+ return 0;
|
|
|
+
|
|
|
+#ifdef VFIO_PRESENT
|
|
|
+ if (!pci_vfio_is_enabled())
|
|
|
+ RTE_LOG(DEBUG, EAL, "VFIO PCI modules not loaded\n");
|
|
|
+#endif
|
|
|
+
|
|
|
+ dir = opendir(rte_pci_get_sysfs_path());
|
|
|
+ if (dir == NULL) {
|
|
|
+ RTE_LOG(ERR, EAL, "%s(): opendir failed: %s\n",
|
|
|
+ __func__, strerror(errno));
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+
|
|
|
+ while ((e = readdir(dir)) != NULL) {
|
|
|
+ if (e->d_name[0] == '.')
|
|
|
+ continue;
|
|
|
+
|
|
|
+ if (parse_pci_addr_format(e->d_name, sizeof(e->d_name), &addr) != 0)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ if (rte_pci_ignore_device(&addr))
|
|
|
+ continue;
|
|
|
+
|
|
|
+ snprintf(dirname, sizeof(dirname), "%s/%s",
|
|
|
+ rte_pci_get_sysfs_path(), e->d_name);
|
|
|
+
|
|
|
+ if (pci_scan_one(dirname, &addr) < 0)
|
|
|
+ goto error;
|
|
|
+ }
|
|
|
+ closedir(dir);
|
|
|
+ return 0;
|
|
|
+
|
|
|
+error:
|
|
|
+ closedir(dir);
|
|
|
+ return -1;
|
|
|
+}
|
|
|
+
|
|
|
+#if defined(RTE_ARCH_X86)
|
|
|
+bool
|
|
|
+pci_device_iommu_support_va(const struct rte_pci_device *dev)
|
|
|
+{
|
|
|
+#define VTD_CAP_MGAW_SHIFT 16
|
|
|
+#define VTD_CAP_MGAW_MASK (0x3fULL << VTD_CAP_MGAW_SHIFT)
|
|
|
+ const struct rte_pci_addr *addr = &dev->addr;
|
|
|
+ char filename[PATH_MAX];
|
|
|
+ FILE *fp;
|
|
|
+ uint64_t mgaw, vtd_cap_reg = 0;
|
|
|
+
|
|
|
+ snprintf(filename, sizeof(filename),
|
|
|
+ "%s/" PCI_PRI_FMT "/iommu/intel-iommu/cap",
|
|
|
+ rte_pci_get_sysfs_path(), addr->domain, addr->bus, addr->devid,
|
|
|
+ addr->function);
|
|
|
+
|
|
|
+ fp = fopen(filename, "r");
|
|
|
+ if (fp == NULL) {
|
|
|
+ /* We don't have an Intel IOMMU, assume VA supported */
|
|
|
+ if (errno == ENOENT)
|
|
|
+ return true;
|
|
|
+
|
|
|
+ RTE_LOG(ERR, EAL, "%s(): can't open %s: %s\n",
|
|
|
+ __func__, filename, strerror(errno));
|
|
|
+ return false;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* We have an Intel IOMMU */
|
|
|
+ if (fscanf(fp, "%" PRIx64, &vtd_cap_reg) != 1) {
|
|
|
+ RTE_LOG(ERR, EAL, "%s(): can't read %s\n", __func__, filename);
|
|
|
+ fclose(fp);
|
|
|
+ return false;
|
|
|
+ }
|
|
|
+
|
|
|
+ fclose(fp);
|
|
|
+
|
|
|
+ mgaw = ((vtd_cap_reg & VTD_CAP_MGAW_MASK) >> VTD_CAP_MGAW_SHIFT) + 1;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Assuming there is no limitation by now. We can not know at this point
|
|
|
+ * because the memory has not been initialized yet. Setting the dma mask
|
|
|
+ * will force a check once memory initialization is done. We can not do
|
|
|
+ * a fallback to IOVA PA now, but if the dma check fails, the error
|
|
|
+ * message should advice for using '--iova-mode pa' if IOVA VA is the
|
|
|
+ * current mode.
|
|
|
+ */
|
|
|
+ rte_mem_set_dma_mask(mgaw);
|
|
|
+ return true;
|
|
|
+}
|
|
|
+#elif defined(RTE_ARCH_PPC_64)
|
|
|
+bool
|
|
|
+pci_device_iommu_support_va(__rte_unused const struct rte_pci_device *dev)
|
|
|
+{
|
|
|
+ /*
|
|
|
+ * IOMMU is always present on a PowerNV host (IOMMUv2).
|
|
|
+ * IOMMU is also present in a KVM/QEMU VM (IOMMUv1) but is not
|
|
|
+ * currently supported by DPDK. Test for our current environment
|
|
|
+ * and report VA support as appropriate.
|
|
|
+ */
|
|
|
+
|
|
|
+ char *line = NULL;
|
|
|
+ size_t len = 0;
|
|
|
+ char filename[PATH_MAX] = "/proc/cpuinfo";
|
|
|
+ FILE *fp = fopen(filename, "r");
|
|
|
+ bool ret = false;
|
|
|
+
|
|
|
+ if (fp == NULL) {
|
|
|
+ RTE_LOG(ERR, EAL, "%s(): can't open %s: %s\n",
|
|
|
+ __func__, filename, strerror(errno));
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Check for a PowerNV platform */
|
|
|
+ while (getline(&line, &len, fp) != -1) {
|
|
|
+ if (strstr(line, "platform") != NULL)
|
|
|
+ continue;
|
|
|
+
|
|
|
+ if (strstr(line, "PowerNV") != NULL) {
|
|
|
+ RTE_LOG(DEBUG, EAL, "Running on a PowerNV system\n");
|
|
|
+ ret = true;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ free(line);
|
|
|
+ fclose(fp);
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+#else
|
|
|
+bool
|
|
|
+pci_device_iommu_support_va(__rte_unused const struct rte_pci_device *dev)
|
|
|
+{
|
|
|
+ return true;
|
|
|
+}
|
|
|
+#endif
|
|
|
+
|
|
|
+enum rte_iova_mode
|
|
|
+pci_device_iova_mode(const struct rte_pci_driver *pdrv,
|
|
|
+ const struct rte_pci_device *pdev)
|
|
|
+{
|
|
|
+ enum rte_iova_mode iova_mode = RTE_IOVA_DC;
|
|
|
+
|
|
|
+ switch (pdev->kdrv) {
|
|
|
+ case RTE_PCI_KDRV_VFIO: {
|
|
|
+#ifdef VFIO_PRESENT
|
|
|
+ static int is_vfio_noiommu_enabled = -1;
|
|
|
+
|
|
|
+ if (is_vfio_noiommu_enabled == -1) {
|
|
|
+ if (rte_vfio_noiommu_is_enabled() == 1)
|
|
|
+ is_vfio_noiommu_enabled = 1;
|
|
|
+ else
|
|
|
+ is_vfio_noiommu_enabled = 0;
|
|
|
+ }
|
|
|
+ if (is_vfio_noiommu_enabled != 0)
|
|
|
+ iova_mode = RTE_IOVA_PA;
|
|
|
+ else if ((pdrv->drv_flags & RTE_PCI_DRV_NEED_IOVA_AS_VA) != 0)
|
|
|
+ iova_mode = RTE_IOVA_VA;
|
|
|
+#endif
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ case RTE_PCI_KDRV_IGB_UIO:
|
|
|
+ case RTE_PCI_KDRV_UIO_GENERIC:
|
|
|
+ iova_mode = RTE_IOVA_PA;
|
|
|
+ break;
|
|
|
+
|
|
|
+ default:
|
|
|
+ if ((pdrv->drv_flags & RTE_PCI_DRV_NEED_IOVA_AS_VA) != 0)
|
|
|
+ iova_mode = RTE_IOVA_VA;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ return iova_mode;
|
|
|
+}
|
|
|
+
|
|
|
+/* Read PCI config space. */
|
|
|
+int rte_pci_read_config(const struct rte_pci_device *device,
|
|
|
+ void *buf, size_t len, off_t offset)
|
|
|
+{
|
|
|
+ char devname[RTE_DEV_NAME_MAX_LEN] = "";
|
|
|
+ const struct rte_intr_handle *intr_handle = &device->intr_handle;
|
|
|
+
|
|
|
+ switch (device->kdrv) {
|
|
|
+ case RTE_PCI_KDRV_IGB_UIO:
|
|
|
+ case RTE_PCI_KDRV_UIO_GENERIC:
|
|
|
+ return pci_uio_read_config(intr_handle, buf, len, offset);
|
|
|
+#ifdef VFIO_PRESENT
|
|
|
+ case RTE_PCI_KDRV_VFIO:
|
|
|
+ return pci_vfio_read_config(intr_handle, buf, len, offset);
|
|
|
+#endif
|
|
|
+ default:
|
|
|
+ rte_pci_device_name(&device->addr, devname,
|
|
|
+ RTE_DEV_NAME_MAX_LEN);
|
|
|
+ RTE_LOG(ERR, EAL,
|
|
|
+ "Unknown driver type for %s\n", devname);
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+/* Write PCI config space. */
|
|
|
+int rte_pci_write_config(const struct rte_pci_device *device,
|
|
|
+ const void *buf, size_t len, off_t offset)
|
|
|
+{
|
|
|
+ char devname[RTE_DEV_NAME_MAX_LEN] = "";
|
|
|
+ const struct rte_intr_handle *intr_handle = &device->intr_handle;
|
|
|
+
|
|
|
+ switch (device->kdrv) {
|
|
|
+ case RTE_PCI_KDRV_IGB_UIO:
|
|
|
+ case RTE_PCI_KDRV_UIO_GENERIC:
|
|
|
+ return pci_uio_write_config(intr_handle, buf, len, offset);
|
|
|
+#ifdef VFIO_PRESENT
|
|
|
+ case RTE_PCI_KDRV_VFIO:
|
|
|
+ return pci_vfio_write_config(intr_handle, buf, len, offset);
|
|
|
+#endif
|
|
|
+ default:
|
|
|
+ rte_pci_device_name(&device->addr, devname,
|
|
|
+ RTE_DEV_NAME_MAX_LEN);
|
|
|
+ RTE_LOG(ERR, EAL,
|
|
|
+ "Unknown driver type for %s\n", devname);
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+#if defined(RTE_ARCH_X86)
|
|
|
+static int
|
|
|
+pci_ioport_map(struct rte_pci_device *dev, int bar __rte_unused,
|
|
|
+ struct rte_pci_ioport *p)
|
|
|
+{
|
|
|
+ uint16_t start, end;
|
|
|
+ FILE *fp;
|
|
|
+ char *line = NULL;
|
|
|
+ char pci_id[16];
|
|
|
+ int found = 0;
|
|
|
+ size_t linesz;
|
|
|
+
|
|
|
+ if (rte_eal_iopl_init() != 0) {
|
|
|
+ RTE_LOG(ERR, EAL, "%s(): insufficient ioport permissions for PCI device %s\n",
|
|
|
+ __func__, dev->name);
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+
|
|
|
+ snprintf(pci_id, sizeof(pci_id), PCI_PRI_FMT,
|
|
|
+ dev->addr.domain, dev->addr.bus,
|
|
|
+ dev->addr.devid, dev->addr.function);
|
|
|
+
|
|
|
+ fp = fopen("/proc/ioports", "r");
|
|
|
+ if (fp == NULL) {
|
|
|
+ RTE_LOG(ERR, EAL, "%s(): can't open ioports\n", __func__);
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+
|
|
|
+ while (getdelim(&line, &linesz, '\n', fp) > 0) {
|
|
|
+ char *ptr = line;
|
|
|
+ char *left;
|
|
|
+ int n;
|
|
|
+
|
|
|
+ n = strcspn(ptr, ":");
|
|
|
+ ptr[n] = 0;
|
|
|
+ left = &ptr[n + 1];
|
|
|
+
|
|
|
+ while (*left && isspace(*left))
|
|
|
+ left++;
|
|
|
+
|
|
|
+ if (!strncmp(left, pci_id, strlen(pci_id))) {
|
|
|
+ found = 1;
|
|
|
+
|
|
|
+ while (*ptr && isspace(*ptr))
|
|
|
+ ptr++;
|
|
|
+
|
|
|
+ sscanf(ptr, "%04hx-%04hx", &start, &end);
|
|
|
+
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ free(line);
|
|
|
+ fclose(fp);
|
|
|
+
|
|
|
+ if (!found)
|
|
|
+ return -1;
|
|
|
+
|
|
|
+ p->base = start;
|
|
|
+ RTE_LOG(DEBUG, EAL, "PCI Port IO found start=0x%x\n", start);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+#endif
|
|
|
+
|
|
|
+int
|
|
|
+rte_pci_ioport_map(struct rte_pci_device *dev, int bar,
|
|
|
+ struct rte_pci_ioport *p)
|
|
|
+{
|
|
|
+ int ret = -1;
|
|
|
+
|
|
|
+ switch (dev->kdrv) {
|
|
|
+#ifdef VFIO_PRESENT
|
|
|
+ case RTE_PCI_KDRV_VFIO:
|
|
|
+ if (pci_vfio_is_enabled())
|
|
|
+ ret = pci_vfio_ioport_map(dev, bar, p);
|
|
|
+ break;
|
|
|
+#endif
|
|
|
+ case RTE_PCI_KDRV_IGB_UIO:
|
|
|
+ ret = pci_uio_ioport_map(dev, bar, p);
|
|
|
+ break;
|
|
|
+ case RTE_PCI_KDRV_UIO_GENERIC:
|
|
|
+#if defined(RTE_ARCH_X86)
|
|
|
+ ret = pci_ioport_map(dev, bar, p);
|
|
|
+#else
|
|
|
+ ret = pci_uio_ioport_map(dev, bar, p);
|
|
|
+#endif
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (!ret)
|
|
|
+ p->dev = dev;
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+void
|
|
|
+rte_pci_ioport_read(struct rte_pci_ioport *p,
|
|
|
+ void *data, size_t len, off_t offset)
|
|
|
+{
|
|
|
+ switch (p->dev->kdrv) {
|
|
|
+#ifdef VFIO_PRESENT
|
|
|
+ case RTE_PCI_KDRV_VFIO:
|
|
|
+ pci_vfio_ioport_read(p, data, len, offset);
|
|
|
+ break;
|
|
|
+#endif
|
|
|
+ case RTE_PCI_KDRV_IGB_UIO:
|
|
|
+ pci_uio_ioport_read(p, data, len, offset);
|
|
|
+ break;
|
|
|
+ case RTE_PCI_KDRV_UIO_GENERIC:
|
|
|
+ pci_uio_ioport_read(p, data, len, offset);
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ break;
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+void
|
|
|
+rte_pci_ioport_write(struct rte_pci_ioport *p,
|
|
|
+ const void *data, size_t len, off_t offset)
|
|
|
+{
|
|
|
+ switch (p->dev->kdrv) {
|
|
|
+#ifdef VFIO_PRESENT
|
|
|
+ case RTE_PCI_KDRV_VFIO:
|
|
|
+ pci_vfio_ioport_write(p, data, len, offset);
|
|
|
+ break;
|
|
|
+#endif
|
|
|
+ case RTE_PCI_KDRV_IGB_UIO:
|
|
|
+ pci_uio_ioport_write(p, data, len, offset);
|
|
|
+ break;
|
|
|
+ case RTE_PCI_KDRV_UIO_GENERIC:
|
|
|
+ pci_uio_ioport_write(p, data, len, offset);
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ break;
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+int
|
|
|
+rte_pci_ioport_unmap(struct rte_pci_ioport *p)
|
|
|
+{
|
|
|
+ int ret = -1;
|
|
|
+
|
|
|
+ switch (p->dev->kdrv) {
|
|
|
+#ifdef VFIO_PRESENT
|
|
|
+ case RTE_PCI_KDRV_VFIO:
|
|
|
+ if (pci_vfio_is_enabled())
|
|
|
+ ret = pci_vfio_ioport_unmap(p);
|
|
|
+ break;
|
|
|
+#endif
|
|
|
+ case RTE_PCI_KDRV_IGB_UIO:
|
|
|
+ ret = pci_uio_ioport_unmap(p);
|
|
|
+ break;
|
|
|
+ case RTE_PCI_KDRV_UIO_GENERIC:
|
|
|
+#if defined(RTE_ARCH_X86)
|
|
|
+ ret = 0;
|
|
|
+#else
|
|
|
+ ret = pci_uio_ioport_unmap(p);
|
|
|
+#endif
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|