X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=lib%2Flibrte_eal%2Fbsdapp%2Feal%2Feal_pci.c;fp=lib%2Flibrte_eal%2Fbsdapp%2Feal%2Feal_pci.c;h=2d16d782d82ee79fab9f004a3f1a4bd6dc8eaf84;hb=97f17497d162afdb82c8704bf097f0fee3724b2e;hp=0000000000000000000000000000000000000000;hpb=e04be89c2409570e0055b2cda60bd11395bb93b0;p=deb_dpdk.git

diff --git a/lib/librte_eal/bsdapp/eal/eal_pci.c b/lib/librte_eal/bsdapp/eal/eal_pci.c
new file mode 100644
index 00000000..2d16d782
--- /dev/null
+++ b/lib/librte_eal/bsdapp/eal/eal_pci.c
@@ -0,0 +1,633 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <unistd.h>
+#include <inttypes.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <dirent.h>
+#include <limits.h>
+#include <sys/queue.h>
+#include <sys/mman.h>
+#include <sys/ioctl.h>
+#include <sys/pciio.h>
+#include <dev/pci/pcireg.h>
+
+#if defined(RTE_ARCH_X86)
+#include <sys/types.h>
+#include <machine/cpufunc.h>
+#endif
+
+#include <rte_interrupts.h>
+#include <rte_log.h>
+#include <rte_pci.h>
+#include <rte_common.h>
+#include <rte_launch.h>
+#include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_eal.h>
+#include <rte_eal_memconfig.h>
+#include <rte_per_lcore.h>
+#include <rte_lcore.h>
+#include <rte_malloc.h>
+#include <rte_string_fns.h>
+#include <rte_debug.h>
+#include <rte_devargs.h>
+
+#include "eal_filesystem.h"
+#include "eal_private.h"
+
+/**
+ * @file
+ * PCI probing under linux
+ *
+ * This code is used to simulate a PCI probe by parsing information in
+ * sysfs. Moreover, when a registered driver matches a device, the
+ * kernel driver currently using it is unloaded and replaced by
+ * igb_uio module, which is a very minimal userland driver for Intel
+ * network card, only providing access to PCI BAR to applications, and
+ * enabling bus master.
+ */
+
+/* unbind kernel driver for this device */
+int
+pci_unbind_kernel_driver(struct rte_pci_device *dev __rte_unused)
+{
+	RTE_LOG(ERR, EAL, "RTE_PCI_DRV_FORCE_UNBIND flag is not implemented "
+		"for BSD\n");
+	return -ENOTSUP;
+}
+
+/* Map pci device */
+int
+rte_eal_pci_map_device(struct rte_pci_device *dev)
+{
+	int ret = -1;
+
+	/* try mapping the NIC resources */
+	switch (dev->kdrv) {
+	case RTE_KDRV_NIC_UIO:
+		/* map resources for devices that use uio */
+		ret = pci_uio_map_resource(dev);
+		break;
+	default:
+		RTE_LOG(DEBUG, EAL,
+			"  Not managed by a supported kernel driver, skipped\n");
+		ret = 1;
+		break;
+	}
+
+	return ret;
+}
+
+/* Unmap pci device */
+void
+rte_eal_pci_unmap_device(struct rte_pci_device *dev)
+{
+	/* try unmapping the NIC resources */
+	switch (dev->kdrv) {
+	case RTE_KDRV_NIC_UIO:
+		/* unmap resources for devices that use uio */
+		pci_uio_unmap_resource(dev);
+		break;
+	default:
+		RTE_LOG(DEBUG, EAL,
+			"  Not managed by a supported kernel driver, skipped\n");
+		break;
+	}
+}
+
+void
+pci_uio_free_resource(struct rte_pci_device *dev,
+		struct mapped_pci_resource *uio_res)
+{
+	rte_free(uio_res);
+
+	if (dev->intr_handle.fd) {
+		close(dev->intr_handle.fd);
+		dev->intr_handle.fd = -1;
+		dev->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
+	}
+}
+
+int
+pci_uio_alloc_resource(struct rte_pci_device *dev,
+		struct mapped_pci_resource **uio_res)
+{
+	char devname[PATH_MAX]; /* contains the /dev/uioX */
+	struct rte_pci_addr *loc;
+
+	loc = &dev->addr;
+
+	snprintf(devname, sizeof(devname), "/dev/uio@pci:%u:%u:%u",
+			dev->addr.bus, dev->addr.devid, dev->addr.function);
+
+	if (access(devname, O_RDWR) < 0) {
+		RTE_LOG(WARNING, EAL, "  "PCI_PRI_FMT" not managed by UIO driver, "
+				"skipping\n", loc->domain, loc->bus, loc->devid, loc->function);
+		return 1;
+	}
+
+	/* save fd if in primary process */
+	dev->intr_handle.fd = open(devname, O_RDWR);
+	if (dev->intr_handle.fd < 0) {
+		RTE_LOG(ERR, EAL, "Cannot open %s: %s\n",
+			devname, strerror(errno));
+		goto error;
+	}
+	dev->intr_handle.type = RTE_INTR_HANDLE_UIO;
+
+	/* allocate the mapping details for secondary processes*/
+	*uio_res = rte_zmalloc("UIO_RES", sizeof(**uio_res), 0);
+	if (*uio_res == NULL) {
+		RTE_LOG(ERR, EAL,
+			"%s(): cannot store uio mmap details\n", __func__);
+		goto error;
+	}
+
+	snprintf((*uio_res)->path, sizeof((*uio_res)->path), "%s", devname);
+	memcpy(&(*uio_res)->pci_addr, &dev->addr, sizeof((*uio_res)->pci_addr));
+
+	return 0;
+
+error:
+	pci_uio_free_resource(dev, *uio_res);
+	return -1;
+}
+
+int
+pci_uio_map_resource_by_index(struct rte_pci_device *dev, int res_idx,
+		struct mapped_pci_resource *uio_res, int map_idx)
+{
+	int fd;
+	char *devname;
+	void *mapaddr;
+	uint64_t offset;
+	uint64_t pagesz;
+	struct pci_map *maps;
+
+	maps = uio_res->maps;
+	devname = uio_res->path;
+	pagesz = sysconf(_SC_PAGESIZE);
+
+	/* allocate memory to keep path */
+	maps[map_idx].path = rte_malloc(NULL, strlen(devname) + 1, 0);
+	if (maps[map_idx].path == NULL) {
+		RTE_LOG(ERR, EAL, "Cannot allocate memory for path: %s\n",
+				strerror(errno));
+		return -1;
+	}
+
+	/*
+	 * open resource file, to mmap it
+	 */
+	fd = open(devname, O_RDWR);
+	if (fd < 0) {
+		RTE_LOG(ERR, EAL, "Cannot open %s: %s\n",
+				devname, strerror(errno));
+		goto error;
+	}
+
+	/* if matching map is found, then use it */
+	offset = res_idx * pagesz;
+	mapaddr = pci_map_resource(NULL, fd, (off_t)offset,
+			(size_t)dev->mem_resource[res_idx].len, 0);
+	close(fd);
+	if (mapaddr == MAP_FAILED)
+		goto error;
+
+	maps[map_idx].phaddr = dev->mem_resource[res_idx].phys_addr;
+	maps[map_idx].size = dev->mem_resource[res_idx].len;
+	maps[map_idx].addr = mapaddr;
+	maps[map_idx].offset = offset;
+	strcpy(maps[map_idx].path, devname);
+	dev->mem_resource[res_idx].addr = mapaddr;
+
+	return 0;
+
+error:
+	rte_free(maps[map_idx].path);
+	return -1;
+}
+
+static int
+pci_scan_one(int dev_pci_fd, struct pci_conf *conf)
+{
+	struct rte_pci_device *dev;
+	struct pci_bar_io bar;
+	unsigned i, max;
+
+	dev = malloc(sizeof(*dev));
+	if (dev == NULL) {
+		return -1;
+	}
+
+	memset(dev, 0, sizeof(*dev));
+	dev->addr.domain = conf->pc_sel.pc_domain;
+	dev->addr.bus = conf->pc_sel.pc_bus;
+	dev->addr.devid = conf->pc_sel.pc_dev;
+	dev->addr.function = conf->pc_sel.pc_func;
+
+	/* get vendor id */
+	dev->id.vendor_id = conf->pc_vendor;
+
+	/* get device id */
+	dev->id.device_id = conf->pc_device;
+
+	/* get subsystem_vendor id */
+	dev->id.subsystem_vendor_id = conf->pc_subvendor;
+
+	/* get subsystem_device id */
+	dev->id.subsystem_device_id = conf->pc_subdevice;
+
+	/* TODO: get max_vfs */
+	dev->max_vfs = 0;
+
+	/* FreeBSD has no NUMA support (yet) */
+	dev->numa_node = 0;
+
+	/* FreeBSD has only one pass through driver */
+	dev->kdrv = RTE_KDRV_NIC_UIO;
+
+	/* parse resources */
+	switch (conf->pc_hdr & PCIM_HDRTYPE) {
+	case PCIM_HDRTYPE_NORMAL:
+		max = PCIR_MAX_BAR_0;
+		break;
+	case PCIM_HDRTYPE_BRIDGE:
+		max = PCIR_MAX_BAR_1;
+		break;
+	case PCIM_HDRTYPE_CARDBUS:
+		max = PCIR_MAX_BAR_2;
+		break;
+	default:
+		goto skipdev;
+	}
+
+	for (i = 0; i <= max; i++) {
+		bar.pbi_sel = conf->pc_sel;
+		bar.pbi_reg = PCIR_BAR(i);
+		if (ioctl(dev_pci_fd, PCIOCGETBAR, &bar) < 0)
+			continue;
+
+		dev->mem_resource[i].len = bar.pbi_length;
+		if (PCI_BAR_IO(bar.pbi_base)) {
+			dev->mem_resource[i].addr = (void *)(bar.pbi_base & ~((uint64_t)0xf));
+			continue;
+		}
+		dev->mem_resource[i].phys_addr = bar.pbi_base & ~((uint64_t)0xf);
+	}
+
+	/* device is valid, add in list (sorted) */
+	if (TAILQ_EMPTY(&pci_device_list)) {
+		TAILQ_INSERT_TAIL(&pci_device_list, dev, next);
+	}
+	else {
+		struct rte_pci_device *dev2 = NULL;
+		int ret;
+
+		TAILQ_FOREACH(dev2, &pci_device_list, next) {
+			ret = rte_eal_compare_pci_addr(&dev->addr, &dev2->addr);
+			if (ret > 0)
+				continue;
+			else if (ret < 0) {
+				TAILQ_INSERT_BEFORE(dev2, dev, next);
+				return 0;
+			} else { /* already registered */
+				dev2->kdrv = dev->kdrv;
+				dev2->max_vfs = dev->max_vfs;
+				memmove(dev2->mem_resource,
+					dev->mem_resource,
+					sizeof(dev->mem_resource));
+				free(dev);
+				return 0;
+			}
+		}
+		TAILQ_INSERT_TAIL(&pci_device_list, dev, next);
+	}
+
+	return 0;
+
+skipdev:
+	free(dev);
+	return 0;
+}
+
+/*
+ * Scan the content of the PCI bus, and add the devices in the devices
+ * list. Call pci_scan_one() for each pci entry found.
+ */
+int
+rte_eal_pci_scan(void)
+{
+	int fd;
+	unsigned dev_count = 0;
+	struct pci_conf matches[16];
+	struct pci_conf_io conf_io = {
+			.pat_buf_len = 0,
+			.num_patterns = 0,
+			.patterns = NULL,
+			.match_buf_len = sizeof(matches),
+			.matches = &matches[0],
+	};
+
+	fd = open("/dev/pci", O_RDONLY);
+	if (fd < 0) {
+		RTE_LOG(ERR, EAL, "%s(): error opening /dev/pci\n", __func__);
+		goto error;
+	}
+
+	do {
+		unsigned i;
+		if (ioctl(fd, PCIOCGETCONF, &conf_io) < 0) {
+			RTE_LOG(ERR, EAL, "%s(): error with ioctl on /dev/pci: %s\n",
+					__func__, strerror(errno));
+			goto error;
+		}
+
+		for (i = 0; i < conf_io.num_matches; i++)
+			if (pci_scan_one(fd, &matches[i]) < 0)
+				goto error;
+
+		dev_count += conf_io.num_matches;
+	} while(conf_io.status == PCI_GETCONF_MORE_DEVS);
+
+	close(fd);
+
+	RTE_LOG(ERR, EAL, "PCI scan found %u devices\n", dev_count);
+	return 0;
+
+error:
+	if (fd >= 0)
+		close(fd);
+	return -1;
+}
+
+/* Read PCI config space. */
+int rte_eal_pci_read_config(const struct rte_pci_device *dev,
+			    void *buf, size_t len, off_t offset)
+{
+	int fd = -1;
+	struct pci_io pi = {
+		.pi_sel = {
+			.pc_domain = dev->addr.domain,
+			.pc_bus = dev->addr.bus,
+			.pc_dev = dev->addr.devid,
+			.pc_func = dev->addr.function,
+		},
+		.pi_reg = offset,
+		.pi_width = len,
+	};
+
+	if (len == 3 || len > sizeof(pi.pi_data)) {
+		RTE_LOG(ERR, EAL, "%s(): invalid pci read length\n", __func__);
+		goto error;
+	}
+
+	fd = open("/dev/pci", O_RDONLY);
+	if (fd < 0) {
+		RTE_LOG(ERR, EAL, "%s(): error opening /dev/pci\n", __func__);
+		goto error;
+	}
+
+	if (ioctl(fd, PCIOCREAD, &pi) < 0)
+		goto error;
+	close(fd);
+
+	memcpy(buf, &pi.pi_data, len);
+	return 0;
+
+ error:
+	if (fd >= 0)
+		close(fd);
+	return -1;
+}
+
+/* Write PCI config space. */
+int rte_eal_pci_write_config(const struct rte_pci_device *dev,
+			     const void *buf, size_t len, off_t offset)
+{
+	int fd = -1;
+
+	struct pci_io pi = {
+		.pi_sel = {
+			.pc_domain = dev->addr.domain,
+			.pc_bus = dev->addr.bus,
+			.pc_dev = dev->addr.devid,
+			.pc_func = dev->addr.function,
+		},
+		.pi_reg = offset,
+		.pi_data = *(const uint32_t *)buf,
+		.pi_width = len,
+	};
+
+	if (len == 3 || len > sizeof(pi.pi_data)) {
+		RTE_LOG(ERR, EAL, "%s(): invalid pci read length\n", __func__);
+		goto error;
+	}
+
+	memcpy(&pi.pi_data, buf, len);
+
+	fd = open("/dev/pci", O_RDONLY);
+	if (fd < 0) {
+		RTE_LOG(ERR, EAL, "%s(): error opening /dev/pci\n", __func__);
+		goto error;
+	}
+
+	if (ioctl(fd, PCIOCWRITE, &pi) < 0)
+		goto error;
+
+	close(fd);
+	return 0;
+
+ error:
+	if (fd >= 0)
+		close(fd);
+	return -1;
+}
+
+int
+rte_eal_pci_ioport_map(struct rte_pci_device *dev, int bar,
+		       struct rte_pci_ioport *p)
+{
+	int ret;
+
+	switch (dev->kdrv) {
+#if defined(RTE_ARCH_X86)
+	case RTE_KDRV_NIC_UIO:
+		if ((uintptr_t) dev->mem_resource[bar].addr <= UINT16_MAX) {
+			p->base = (uintptr_t)dev->mem_resource[bar].addr;
+			ret = 0;
+		} else
+			ret = -1;
+		break;
+#endif
+	default:
+		ret = -1;
+		break;
+	}
+
+	if (!ret)
+		p->dev = dev;
+
+	return ret;
+}
+
+static void
+pci_uio_ioport_read(struct rte_pci_ioport *p,
+		    void *data, size_t len, off_t offset)
+{
+#if defined(RTE_ARCH_X86)
+	uint8_t *d;
+	int size;
+	unsigned short reg = p->base + offset;
+
+	for (d = data; len > 0; d += size, reg += size, len -= size) {
+		if (len >= 4) {
+			size = 4;
+			*(uint32_t *)d = inl(reg);
+		} else if (len >= 2) {
+			size = 2;
+			*(uint16_t *)d = inw(reg);
+		} else {
+			size = 1;
+			*d = inb(reg);
+		}
+	}
+#else
+	RTE_SET_USED(p);
+	RTE_SET_USED(data);
+	RTE_SET_USED(len);
+	RTE_SET_USED(offset);
+#endif
+}
+
+void
+rte_eal_pci_ioport_read(struct rte_pci_ioport *p,
+			void *data, size_t len, off_t offset)
+{
+	switch (p->dev->kdrv) {
+	case RTE_KDRV_NIC_UIO:
+		pci_uio_ioport_read(p, data, len, offset);
+		break;
+	default:
+		break;
+	}
+}
+
+static void
+pci_uio_ioport_write(struct rte_pci_ioport *p,
+		     const void *data, size_t len, off_t offset)
+{
+#if defined(RTE_ARCH_X86)
+	const uint8_t *s;
+	int size;
+	unsigned short reg = p->base + offset;
+
+	for (s = data; len > 0; s += size, reg += size, len -= size) {
+		if (len >= 4) {
+			size = 4;
+			outl(*(const uint32_t *)s, reg);
+		} else if (len >= 2) {
+			size = 2;
+			outw(*(const uint16_t *)s, reg);
+		} else {
+			size = 1;
+			outb(*s, reg);
+		}
+	}
+#else
+	RTE_SET_USED(p);
+	RTE_SET_USED(data);
+	RTE_SET_USED(len);
+	RTE_SET_USED(offset);
+#endif
+}
+
+void
+rte_eal_pci_ioport_write(struct rte_pci_ioport *p,
+			 const void *data, size_t len, off_t offset)
+{
+	switch (p->dev->kdrv) {
+	case RTE_KDRV_NIC_UIO:
+		pci_uio_ioport_write(p, data, len, offset);
+		break;
+	default:
+		break;
+	}
+}
+
+int
+rte_eal_pci_ioport_unmap(struct rte_pci_ioport *p)
+{
+	int ret;
+
+	switch (p->dev->kdrv) {
+#if defined(RTE_ARCH_X86)
+	case RTE_KDRV_NIC_UIO:
+		ret = 0;
+		break;
+#endif
+	default:
+		ret = -1;
+		break;
+	}
+
+	return ret;
+}
+
+/* Init the PCI EAL subsystem */
+int
+rte_eal_pci_init(void)
+{
+	TAILQ_INIT(&pci_driver_list);
+	TAILQ_INIT(&pci_device_list);
+
+	/* for debug purposes, PCI can be disabled */
+	if (internal_config.no_pci)
+		return 0;
+
+	if (rte_eal_pci_scan() < 0) {
+		RTE_LOG(ERR, EAL, "%s(): Cannot scan PCI bus\n", __func__);
+		return -1;
+	}
+	return 0;
+}