X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Flibrte_eal%2Flinuxapp%2Feal%2Feal_pci.c;h=3b94b6fb54fd487cb728741cbe515db0bdd46d55;hb=629395b063e8278a05ea41908d1152fa68df098c;hp=20a4342b0de962d49f84bec72ec59b9e10683db8;hpb=eee16c964cd6b90622c36a7976ad951313b2ccd3;p=dpdk.git

diff --git a/lib/librte_eal/linuxapp/eal/eal_pci.c b/lib/librte_eal/linuxapp/eal/eal_pci.c
index 20a4342b0d..3b94b6fb54 100644
--- a/lib/librte_eal/linuxapp/eal/eal_pci.c
+++ b/lib/librte_eal/linuxapp/eal/eal_pci.c
@@ -1,518 +1,128 @@
 /*-
  *   BSD LICENSE
- * 
- *   Copyright(c) 2010-2013 Intel Corporation. All rights reserved.
+ *
+ *   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 
+ *
+ *   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 
+ *
+ *     * 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 
+ *     * 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 
+ *     * 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 
+ *
+ *   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 <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_tailq.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 "rte_pci_dev_ids.h"
 #include "eal_filesystem.h"
 #include "eal_private.h"
+#include "eal_pci_init.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.
- */
-
-struct uio_map {
-	void *addr;
-	uint64_t offset;
-	uint64_t size;
-	uint64_t phaddr;
-};
-
-#define PROC_MODULES "/proc/modules"
-
-#define IGB_UIO_NAME "igb_uio"
-
-#define UIO_DRV_PATH  "/sys/bus/pci/drivers/%s"
-
-/* maximum time to wait that /dev/uioX appears */
-#define UIO_DEV_WAIT_TIMEOUT 3 /* seconds */
-
-/*
- * For multi-process we need to reproduce all PCI mappings in secondary
- * processes, so save them in a tailq.
- */
-struct uio_resource {
-	TAILQ_ENTRY(uio_resource) next;
-
-	struct rte_pci_addr pci_addr;
-	char path[PATH_MAX];
-	size_t nb_maps;
-	struct uio_map maps[PCI_MAX_RESOURCE];
-};
-
-TAILQ_HEAD(uio_res_list, uio_resource);
-
-static struct uio_res_list *uio_res_list = NULL;
-static int pci_parse_sysfs_value(const char *filename, uint64_t *val);
-
-/*
- * Check that a kernel module is loaded. Returns 0 on success, or if the
- * parameter is NULL, or -1 if the module is not loaded.
+ * This code is used to simulate a PCI probe by parsing information in sysfs.
+ * When a registered device matches a driver, it is then initialized with
+ * IGB_UIO driver (or doesn't initialize, if the device wasn't bound to it).
  */
-static int
-pci_uio_check_module(const char *module_name)
-{
-	FILE *f;
-	unsigned i;
-	char buf[BUFSIZ];
 
-	if (module_name == NULL)
-		return 0;
+struct mapped_pci_res_list *pci_res_list = NULL;
 
-	f = fopen(PROC_MODULES, "r");
-	if (f == NULL) {
-		RTE_LOG(ERR, EAL, "Cannot open "PROC_MODULES": %s\n", 
-				strerror(errno));
-		return -1;
-	}
-
-	while(fgets(buf, sizeof(buf), f) != NULL) {
-
-		for (i = 0; i < sizeof(buf) && buf[i] != '\0'; i++) {
-			if (isspace(buf[i]))
-			    buf[i] = '\0';
-		}
-
-		if (strncmp(buf, module_name, sizeof(buf)) == 0) {
-			fclose(f);
-			return 0;
-		}
-	}
-	fclose(f);
-	return -1;
-}
-
-/* bind a PCI to the kernel module driver */
+/* unbind kernel driver for this device */
 static int
-pci_bind_device(struct rte_pci_device *dev, char dr_path[])
+pci_unbind_kernel_driver(struct rte_pci_device *dev)
 {
-	FILE *f;
 	int n;
+	FILE *f;
+	char filename[PATH_MAX];
 	char buf[BUFSIZ];
-	char dev_bind[PATH_MAX];
 	struct rte_pci_addr *loc = &dev->addr;
 
-	RTE_LOG(DEBUG, EAL, "bind PCI device "PCI_PRI_FMT"\n",
-		        loc->domain, loc->bus, loc->devid, loc->function);
+	/* open /sys/bus/pci/devices/AAAA:BB:CC.D/driver */
+	rte_snprintf(filename, sizeof(filename),
+	         SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/driver/unbind",
+	         loc->domain, loc->bus, loc->devid, loc->function);
 
-	n = rte_snprintf(dev_bind, sizeof(dev_bind), "%s/bind", dr_path);
-	if ((n < 0) || (n >= (int)sizeof(buf))) {
-		RTE_LOG(ERR, EAL, "Cannot rte_snprintf device bind path\n");
-		return -1;
-	}
+	f = fopen(filename, "w");
+	if (f == NULL) /* device was not bound */
+		return 0;
 
-	f = fopen(dev_bind, "w");
-	if (f == NULL) {
-		RTE_LOG(ERR, EAL, "Cannot open %s\n", dev->previous_dr);
-		return -1;
-	}
 	n = rte_snprintf(buf, sizeof(buf), PCI_PRI_FMT "\n",
-	                 loc->domain, loc->bus, loc->devid, loc->function);
+	             loc->domain, loc->bus, loc->devid, loc->function);
 	if ((n < 0) || (n >= (int)sizeof(buf))) {
-		RTE_LOG(ERR, EAL, "Cannot rte_snprintf PCI infos\n");
-		fclose(f);
-		return -1;
+		RTE_LOG(ERR, EAL, "%s(): rte_snprintf failed\n", __func__);
+		goto error;
 	}
 	if (fwrite(buf, n, 1, f) == 0) {
-		fclose(f);
-		return -1;
+		RTE_LOG(ERR, EAL, "%s(): could not write to %s\n", __func__,
+				filename);
+		goto error;
 	}
 
-	RTE_LOG(DEBUG, EAL, "Device bound\n");
-
 	fclose(f);
 	return 0;
-}
-
-static int
-pci_uio_bind_device(struct rte_pci_device *dev, const char *module_name)
-{
-	FILE *f;
-	int n;
-	char buf[BUFSIZ];
-	char uio_newid[PATH_MAX];
-	char uio_bind[PATH_MAX];
-
-	n = rte_snprintf(uio_newid, sizeof(uio_newid), UIO_DRV_PATH "/new_id", module_name);
-	if ((n < 0) || (n >= (int)sizeof(uio_newid))) {
-		RTE_LOG(ERR, EAL, "Cannot rte_snprintf uio_newid name\n");
-		return -1;
-	}
-
-	n = rte_snprintf(uio_bind, sizeof(uio_bind), UIO_DRV_PATH, module_name);
-	if ((n < 0) || (n >= (int)sizeof(uio_bind))) {
-		RTE_LOG(ERR, EAL, "Cannot rte_snprintf uio_bind name\n");
-		return -1;
-	}
 
-	n = rte_snprintf(buf, sizeof(buf), "%x %x\n",
-			dev->id.vendor_id, dev->id.device_id);
-	if ((n < 0) || (n >= (int)sizeof(buf))) {
-		RTE_LOG(ERR, EAL, "Cannot rte_snprintf vendor_id/device_id\n");
-		return -1;
-	}
-
-	f = fopen(uio_newid, "w");
-	if (f == NULL) {
-		RTE_LOG(ERR, EAL, "Cannot open %s\n", uio_newid);
-		return -1;
-	}
-	if (fwrite(buf, n, 1, f) == 0) {
-		fclose(f);
-		return -1;
-	}
+error:
 	fclose(f);
-
-	pci_bind_device(dev, uio_bind);
-	return 0;
-}
-
-
-/*
- * open devname: it can take some time to
- * appear, so we wait some time before returning an error
- */
-static int uio_open(const char *devname)
-{
-	int n, fd;
-
-	for (n=0; n < UIO_DEV_WAIT_TIMEOUT*10; n++) {
-		fd = open(devname, O_RDWR);
-		if (fd >= 0)
-			return fd;
-
-		if (errno != ENOENT)
-			break;
-		usleep(100000);
-	}
 	return -1;
 }
 
 /* map a particular resource from a file */
-static void *
-pci_mmap(int fd, void *addr, off_t offset, size_t size)
+void *
+pci_map_resource(void *requested_addr, int fd, off_t offset, size_t size)
 {
 	void *mapaddr;
 
 	/* Map the PCI memory resource of device */
-	mapaddr = mmap(addr, size, PROT_READ | PROT_WRITE, MAP_SHARED,
-		       fd, offset);
-	if (mapaddr == MAP_FAILED || (addr != NULL && mapaddr != addr)) {
-		RTE_LOG(ERR, EAL, "%s(): cannot mmap %zd@0x%lx: %s\n",
-			__func__, size, offset, strerror(errno));
-		return NULL;
+	mapaddr = mmap(requested_addr, size, PROT_READ | PROT_WRITE,
+			MAP_SHARED, fd, offset);
+	if (mapaddr == MAP_FAILED ||
+			(requested_addr != NULL && mapaddr != requested_addr)) {
+		RTE_LOG(ERR, EAL, "%s(): cannot mmap(%d, %p, 0x%lx, 0x%lx): %s (%p)\n",
+			__func__, fd, requested_addr,
+			(unsigned long)size, (unsigned long)offset,
+			strerror(errno), mapaddr);
+		goto fail;
 	}
 
-	RTE_LOG(DEBUG, EAL, "PCI memory mapped at %p\n", mapaddr);
+	RTE_LOG(DEBUG, EAL, "  PCI memory mapped at %p\n", mapaddr);
+
 	return mapaddr;
 
 fail:
-	dev->intr_handle.fd = -1;
-	dev->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
-
 	return NULL;
 }
 
-#define OFF_MAX              ((uint64_t)(off_t)-1)
-static ssize_t
-pci_uio_get_mappings(const char *devname, struct uio_map maps[], size_t nb_maps)
-{
-	size_t i;
-	char dirname[PATH_MAX];
-	char filename[PATH_MAX];
-	uint64_t offset, size;
-
-	for (i = 0; i != nb_maps; i++) {
- 
-		/* check if map directory exists */
-		rte_snprintf(dirname, sizeof(dirname), 
-			"%s/maps/map%u", devname, i);
- 
-		if (access(dirname, F_OK) != 0)
-			break;
- 
-		/* get mapping offset */
-		rte_snprintf(filename, sizeof(filename),
-			"%s/offset", dirname);
-		if (pci_parse_sysfs_value(filename, &offset) < 0) {
-			RTE_LOG(ERR, EAL,
-				"%s(): cannot parse offset of %s\n",
-				__func__, dirname);
-			return (-1);
-		}
- 
-		/* get mapping size */
-		rte_snprintf(filename, sizeof(filename),
-			"%s/size", dirname);
-		if (pci_parse_sysfs_value(filename, &size) < 0) {
-			RTE_LOG(ERR, EAL,
-				"%s(): cannot parse size of %s\n",
-				__func__, dirname);
-			return (-1);
-		}
- 
-		/* get mapping physical address */
-		rte_snprintf(filename, sizeof(filename),
-			"%s/addr", dirname);
-		if (pci_parse_sysfs_value(filename, &maps[i].phaddr) < 0) {
-			RTE_LOG(ERR, EAL,
-				"%s(): cannot parse addr of %s\n",
-				__func__, dirname);
-			return (-1);
-		}
-
-		if ((offset > OFF_MAX) || (size > SIZE_MAX)) {
-			RTE_LOG(ERR, EAL,
-				"%s(): offset/size exceed system max value\n",
-				__func__); 
-			return (-1);
-		}
-
-		maps[i].offset = offset;
-		maps[i].size = size;
-        }
-	return (i);
-}
-
-static int
-pci_uio_map_secondary(struct rte_pci_device *dev)
-{
-        size_t i;
-        struct uio_resource *uio_res;
- 
-	TAILQ_FOREACH(uio_res, uio_res_list, next) {
- 
-		/* skip this element if it doesn't match our PCI address */
-		if (memcmp(&uio_res->pci_addr, &dev->addr, sizeof(dev->addr)))
-			continue;
-                
-		for (i = 0; i != uio_res->nb_maps; i++) {
-			if (pci_map_resource(dev, uio_res->maps[i].addr,
-					uio_res->path,
-					(off_t)uio_res->maps[i].offset,
-					(size_t)uio_res->maps[i].size) != 
-					uio_res->maps[i].addr) {
-				RTE_LOG(ERR, EAL,
-					"Cannot mmap device resource\n");
-				return (-1);
-			}
-		}
-		return (0);
-	}
-
-	RTE_LOG(ERR, EAL, "Cannot find resource for device\n");
-	return -1;
-}
-
-/* map the PCI resource of a PCI device in virtual memory */
-static int
-pci_uio_map_resource(struct rte_pci_device *dev)
-{
-	int i, j;
-	struct dirent *e;
-	DIR *dir;
-	char dirname[PATH_MAX];
-	char dirname2[PATH_MAX];
-	char devname[PATH_MAX]; /* contains the /dev/uioX */
-	void *mapaddr;
-	unsigned uio_num;
-	uint64_t phaddr;
-	uint64_t offset;
-	uint64_t pagesz;
-	ssize_t nb_maps;
-	struct rte_pci_addr *loc = &dev->addr;
-	struct uio_resource *uio_res;
-	struct uio_map *maps;
-
-	RTE_LOG(DEBUG, EAL, "map PCI resource for device "PCI_PRI_FMT"\n",
-	        loc->domain, loc->bus, loc->devid, loc->function);
-
-	/* secondary processes - use already recorded details */
-	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
-		return pci_uio_map_restore(dev);
-
-	/* depending on kernel version, uio can be located in uio/uioX
-	 * or uio:uioX */
-
-	rte_snprintf(dirname, sizeof(dirname),
-	         "/sys/bus/pci/devices/" PCI_PRI_FMT "/uio",
-	         loc->domain, loc->bus, loc->devid, loc->function);
-
-	dir = opendir(dirname);
-	if (dir == NULL) {
-		/* retry with the parent directory */
-		rte_snprintf(dirname, sizeof(dirname),
-		         "/sys/bus/pci/devices/" PCI_PRI_FMT,
-		         loc->domain, loc->bus, loc->devid, loc->function);
-		dir = opendir(dirname);
-
-		if (dir == NULL) {
-			RTE_LOG(ERR, EAL, "Cannot opendir %s\n", dirname);
-			return -1;
-		}
-	}
-
-	/* take the first file starting with "uio" */
-	while ((e = readdir(dir)) != NULL) {
-		int shortprefix_len = sizeof("uio") - 1; /* format could be uio%d ...*/
-		int longprefix_len = sizeof("uio:uio") - 1; /* ... or uio:uio%d */
-		char *endptr;
-
-		if (strncmp(e->d_name, "uio", 3) != 0)
-			continue;
-
-		/* first try uio%d */
-		errno = 0;
-		uio_num = strtoull(e->d_name + shortprefix_len, &endptr, 10);
-		if (errno == 0 && endptr != e->d_name) {
-			rte_snprintf(dirname2, sizeof(dirname2),
-				 "%s/uio%u", dirname, uio_num);
-			break;
-		}
-
-		/* then try uio:uio%d */
-		errno = 0;
-		uio_num = strtoull(e->d_name + longprefix_len, &endptr, 10);
-		if (errno == 0 && endptr != e->d_name) {
-			rte_snprintf(dirname2, sizeof(dirname2),
-				 "%s/uio:uio%u", dirname, uio_num);
-			break;
-		}
-	}
-	closedir(dir);
-
-	/* No uio resource found */
-	if (e == NULL) {
-		RTE_LOG(WARNING, EAL, "  "PCI_PRI_FMT" not managed by UIO driver, "
-				"skipping\n", loc->domain, loc->bus, loc->devid, loc->function);
-		return -1;
-	}
-
-	/* allocate the mapping details for secondary processes*/
-	if ((uio_res = rte_zmalloc("UIO_RES", sizeof (*uio_res), 0)) == NULL) {
-		RTE_LOG(ERR, EAL,
-			"%s(): cannot store uio mmap details\n", __func__);
-		return (-1);
-	}
- 
-	rte_snprintf(devname, sizeof(devname), "/dev/uio%u", uio_num);
-	rte_snprintf(uio_res->path, sizeof(uio_res->path), "%s", devname);
-	memcpy(&uio_res->pci_addr, &dev->addr, sizeof(uio_res->pci_addr));
- 
-	/* collect info about device mappings */
-	if ((nb_maps = pci_uio_get_mappings(dirname2, uio_res->maps,
-			sizeof (uio_res->maps) / sizeof (uio_res->maps[0])))
-			< 0)
-		return (nb_maps);
- 
-	uio_res->nb_maps = nb_maps;
-
-	/* Map all BARs */
-	pagesz = sysconf(_SC_PAGESIZE);
- 
-	maps = uio_res->maps;
-	for (i = 0; i != PCI_MAX_RESOURCE; i++) {
-    
-		/* skip empty BAR */
-		if ((phaddr = dev->mem_resource[i].phys_addr) == 0)
-			continue;
- 
-		for (j = 0; j != nb_maps && (phaddr != maps[j].phaddr ||
-				dev->mem_resource[i].len != maps[j].size);
-				j++)
-			;
- 
-		/* if matching map is found, then use it */
-		if (j != nb_maps) {
-			offset = j * pagesz;
-			if (maps[j].addr != NULL ||
-					(mapaddr = pci_map_resource(dev,
-					NULL, devname, (off_t)offset,
-					(size_t)maps[j].size)) == NULL) {
-				return (-1);
-			}
- 
-			maps[j].addr = mapaddr;
-			maps[j].offset = offset;
-			dev->mem_resource[i].addr = mapaddr;
-		}
-	}
-
-	TAILQ_INSERT_TAIL(uio_res_list, uio_res, next);
-
-	return (0);
-}
-
 /* parse the "resource" sysfs file */
 #define IORESOURCE_MEM  0x00000200
 
@@ -541,12 +151,14 @@ pci_parse_sysfs_resource(const char *filename, struct rte_pci_device *dev)
 	for (i = 0; i<PCI_MAX_RESOURCE; i++) {
 
 		if (fgets(buf, sizeof(buf), f) == NULL) {
-			RTE_LOG(ERR, EAL, "%s(): cannot read resource\n", __func__);
+			RTE_LOG(ERR, EAL,
+				"%s(): cannot read resource\n", __func__);
 			goto error;
 		}
 
 		if (rte_strsplit(buf, sizeof(buf), res_info.ptrs, 3, ' ') != 3) {
-			RTE_LOG(ERR, EAL, "%s(): bad resource format\n", __func__);
+			RTE_LOG(ERR, EAL,
+				"%s(): bad resource format\n", __func__);
 			goto error;
 		}
 		errno = 0;
@@ -554,7 +166,8 @@ pci_parse_sysfs_resource(const char *filename, struct rte_pci_device *dev)
 		end_addr = strtoull(res_info.end_addr, NULL, 16);
 		flags = strtoull(res_info.flags, NULL, 16);
 		if (errno != 0) {
-			RTE_LOG(ERR, EAL, "%s(): bad resource format\n", __func__);
+			RTE_LOG(ERR, EAL,
+				"%s(): bad resource format\n", __func__);
 			goto error;
 		}
 
@@ -562,7 +175,7 @@ pci_parse_sysfs_resource(const char *filename, struct rte_pci_device *dev)
 			dev->mem_resource[i].phys_addr = phys_addr;
 			dev->mem_resource[i].len = end_addr - phys_addr + 1;
 			/* not mapped for now */
-			dev->mem_resource[i].addr = NULL; 
+			dev->mem_resource[i].addr = NULL;
 		}
 	}
 	fclose(f);
@@ -573,52 +186,17 @@ error:
 	return -1;
 }
 
-/* 
- * parse a sysfs file containing one integer value 
- * different to the eal version, as it needs to work with 64-bit values
- */ 
-static int 
-pci_parse_sysfs_value(const char *filename, uint64_t *val) 
-{
-        FILE *f;
-        char buf[BUFSIZ];
-        char *end = NULL;
- 
-        f = fopen(filename, "r");
-        if (f == NULL) {
-                RTE_LOG(ERR, EAL, "%s(): cannot open sysfs value %s\n",
-                        __func__, filename);
-                return -1;
-        }
- 
-        if (fgets(buf, sizeof(buf), f) == NULL) {
-                RTE_LOG(ERR, EAL, "%s(): cannot read sysfs value %s\n",
-                        __func__, filename);
-                fclose(f);
-                return -1;
-        }
-        *val = strtoull(buf, &end, 0);
-        if ((buf[0] == '\0') || (end == NULL) || (*end != '\n')) {
-                RTE_LOG(ERR, EAL, "%s(): cannot parse sysfs value %s\n",
-                                __func__, filename);
-                fclose(f);
-                return -1;
-        }
-        fclose(f);
-        return 0;
-}
-
 /* Compare two PCI device addresses. */
 static int
 pci_addr_comparison(struct rte_pci_addr *addr, struct rte_pci_addr *addr2)
 {
-        uint64_t dev_addr = (addr->domain << 24) + (addr->bus << 16) + (addr->devid << 8) + addr->function;
-        uint64_t dev_addr2 = (addr2->domain << 24) + (addr2->bus << 16) + (addr2->devid << 8) + addr2->function;
+	uint64_t dev_addr = (addr->domain << 24) + (addr->bus << 16) + (addr->devid << 8) + addr->function;
+	uint64_t dev_addr2 = (addr2->domain << 24) + (addr2->bus << 16) + (addr2->devid << 8) + addr2->function;
 
-        if (dev_addr > dev_addr2) 
-                return 1;	
-        else 
-                return 0;
+	if (dev_addr > dev_addr2)
+		return 1;
+	else
+		return 0;
 }
 
 
@@ -676,6 +254,28 @@ pci_scan_one(const char *dirname, uint16_t domain, uint8_t bus,
 	}
 	dev->id.subsystem_device_id = (uint16_t)tmp;
 
+	/* get max_vfs */
+	dev->max_vfs = 0;
+	rte_snprintf(filename, sizeof(filename), "%s/max_vfs", dirname);
+	if (!access(filename, F_OK) &&
+	    eal_parse_sysfs_value(filename, &tmp) == 0) {
+		dev->max_vfs = (uint16_t)tmp;
+	}
+
+	/* get numa node */
+	rte_snprintf(filename, sizeof(filename), "%s/numa_node",
+		 dirname);
+	if (access(filename, R_OK) != 0) {
+		/* if no NUMA support just set node to 0 */
+		dev->numa_node = -1;
+	} else {
+		if (eal_parse_sysfs_value(filename, &tmp) < 0) {
+			free(dev);
+			return -1;
+		}
+		dev->numa_node = tmp;
+	}
+
 	/* parse resources */
 	rte_snprintf(filename, sizeof(filename), "%s/resource", dirname);
 	if (pci_parse_sysfs_resource(filename, dev) < 0) {
@@ -685,13 +285,13 @@ pci_scan_one(const char *dirname, uint16_t domain, uint8_t bus,
 	}
 
 	/* device is valid, add in list (sorted) */
-	if (TAILQ_EMPTY(&device_list)) {
-		TAILQ_INSERT_TAIL(&device_list, dev, next);
-	}	
+	if (TAILQ_EMPTY(&pci_device_list)) {
+		TAILQ_INSERT_TAIL(&pci_device_list, dev, next);
+	}
 	else {
 		struct rte_pci_device *dev2 = NULL;
 
-		TAILQ_FOREACH(dev2, &device_list, next) {
+		TAILQ_FOREACH(dev2, &pci_device_list, next) {
 			if (pci_addr_comparison(&dev->addr, &dev2->addr))
 				continue;
 			else {
@@ -699,9 +299,9 @@ pci_scan_one(const char *dirname, uint16_t domain, uint8_t bus,
 				return 0;
 			}
 		}
-		TAILQ_INSERT_TAIL(&device_list, dev, next);
+		TAILQ_INSERT_TAIL(&pci_device_list, dev, next);
 	}
-				
+
 	return 0;
 }
 
@@ -793,104 +393,30 @@ error:
 	return -1;
 }
 
-/* unbind kernel driver for this device */
 static int
-pci_unbind_kernel_driver(struct rte_pci_device *dev)
+pci_map_device(struct rte_pci_device *dev)
 {
-	int n;
-	FILE *f;
-	char filename[PATH_MAX];
-	char buf[BUFSIZ];
-	struct rte_pci_addr *loc = &dev->addr;
-
-	/* open /sys/bus/pci/devices/AAAA:BB:CC.D/driver */
-	rte_snprintf(filename, sizeof(filename),
-	         SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/driver/unbind",
-	         loc->domain, loc->bus, loc->devid, loc->function);
-
-	RTE_LOG(DEBUG, EAL, "unbind kernel driver %s\n", filename);
-
-	f = fopen(filename, "w");
-	if (f == NULL) /* device was not bound */
-		return 0;
+	int ret, mapped = 0;
 
-	n = rte_snprintf(buf, sizeof(buf), PCI_PRI_FMT "\n",
-	             loc->domain, loc->bus, loc->devid, loc->function);
-	if ((n < 0) || (n >= (int)sizeof(buf))) {
-		RTE_LOG(ERR, EAL, "%s(): rte_snprintf failed\n", __func__);
-		goto error;
-	}
-	if (fwrite(buf, n, 1, f) == 0) {
-		RTE_LOG(ERR, EAL, "%s(): could not write to %s\n", __func__,
-				filename);
-		goto error;
-	}
-
-	fclose(f);
-	return 0;
-
-error:
-	fclose(f);
-	return -1;
-}
-
-static int
-pci_exit_process(struct rte_pci_device *dev)
-{
-	if (munmap(dev->mem_resource.addr, dev->mem_resource.len) == -1){
-		RTE_LOG(ERR, EAL, "Error with munmap\n");
-		return -1;
-	}
-	if (close(dev->intr_handle.fd) == -1){
-		RTE_LOG(ERR, EAL, "Error closing interrupt handle\n");
-		return -1;
+	/* try mapping the NIC resources using VFIO if it exists */
+#ifdef VFIO_PRESENT
+	if (pci_vfio_is_enabled()) {
+		ret = pci_vfio_map_resource(dev);
+		if (ret == 0)
+			mapped = 1;
+		else if (ret < 0)
+			return ret;
 	}
-	if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
-		if (pci_unbind_kernel_driver(dev) < 0){
-			RTE_LOG(ERR, EAL, "Error unbinding\n");
-			return -1;
-		}
-		if (pci_bind_device(dev, dev->previous_dr) < 0){
-			RTE_LOG(ERR, EAL, "Error binding\n");
-			return -1;
-		}
+#endif
+	/* map resources for devices that use igb_uio */
+	if (!mapped) {
+		ret = pci_uio_map_resource(dev);
+		if (ret != 0)
+			return ret;
 	}
-
 	return 0;
 }
 
-static void
-pci_get_previous_driver_path(struct rte_pci_device *dev)
-{
-	int n;
-	char dev_path[PATH_MAX];
-	char dr_path[PATH_MAX];
-	struct rte_pci_addr *loc = &dev->addr;
-
-	n = rte_snprintf(dev_path, sizeof(dev_path), SYSFS_PCI_DEVICES "/"
-			PCI_PRI_FMT "/driver", loc->domain, loc->bus, loc->devid, loc->function );
-	if ((n < 0) || (n >= (int)sizeof(dev_path)))
-		RTE_LOG(ERR, EAL, "Cannot rte_snprintf device filepath\n");
-
-	n = readlink(dev_path, dr_path, sizeof(dr_path));
-	if ((n < 0) || (n >= (int)sizeof(dr_path))){
-		RTE_LOG(ERR, EAL, "Cannot readlink driver filepath\n");
-		dev->previous_dr[0] = '\0';
-		return;
-	}
-	dr_path[n] = '\0';
-
-	if (dr_path[0] != '/')
-		n = rte_snprintf(dev->previous_dr, sizeof(dev->previous_dr),
-				SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/%s",
-				loc->domain, loc->bus, loc->devid, loc->function, dr_path);
-	else
-		n = rte_snprintf(dev->previous_dr, sizeof(dev->previous_dr),
-				"%s", dr_path);
-	if ((n < 0) || (n >= (int)sizeof(dev_path)))
-		RTE_LOG(ERR, EAL, "Cannot rte_snprintf driver filepath\n");
-}
-
 /*
  * If vendor/device ID match, call the devinit() function of the
  * driver.
@@ -898,12 +424,8 @@ pci_get_previous_driver_path(struct rte_pci_device *dev)
 int
 rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr, struct rte_pci_device *dev)
 {
+	int ret;
 	struct rte_pci_id *id_table;
-	const char *module_name = NULL;
-	int uio_status = -1;
-
-	if (dr->drv_flags & RTE_PCI_DRV_NEED_IGB_UIO)
-		module_name = IGB_UIO_NAME;
 
 	for (id_table = dr->id_table ; id_table->vendor_id != 0; id_table++) {
 
@@ -921,81 +443,52 @@ rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr, struct rte_pci_device *d
 				id_table->subsystem_device_id != PCI_ANY_ID)
 			continue;
 
-		RTE_LOG(DEBUG, EAL, "probe driver: %x:%x %s\n", dev->id.vendor_id,
-				dev->id.device_id, dr->name);
+		struct rte_pci_addr *loc = &dev->addr;
 
-		/* reference driver structure */
-		dev->driver = dr;
+		RTE_LOG(DEBUG, EAL, "PCI device "PCI_PRI_FMT" on NUMA socket %i\n",
+				loc->domain, loc->bus, loc->devid, loc->function,
+				dev->numa_node);
+
+		RTE_LOG(DEBUG, EAL, "  probe driver: %x:%x %s\n", dev->id.vendor_id,
+				dev->id.device_id, dr->name);
 
 		/* no initialization when blacklisted, return without error */
-		if (dev->blacklisted)
-			return 0;
-
-		/* Unbind PCI devices if needed */
-		if (module_name != NULL) {
-
-			if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
-				/* check that our driver is loaded */
-				if (uio_status != 0 &&
-						(uio_status = pci_uio_check_module(module_name)) != 0)
-					rte_exit(EXIT_FAILURE, "The %s module is required by the "
-							"%s driver\n", module_name, dr->name);
-
-				/* unbind current driver, bind ours */
-				pci_get_previous_driver_path(dev);
-				if (pci_unbind_kernel_driver(dev) < 0)
-					return -1;
-				if (pci_uio_bind_device(dev, module_name) < 0)
-					return -1;
-			}
-			/* map the NIC resources */
-			if (pci_uio_map_resource(dev) < 0)
-				return -1;
-#else
-		/* just map the NIC resources */
-		if (pci_uio_map_resource(dev) < 0)
-			return -1;
-#endif
+		if (dev->devargs != NULL &&
+			dev->devargs->type == RTE_DEVTYPE_BLACKLISTED_PCI) {
+			RTE_LOG(DEBUG, EAL, "  Device is blacklisted, not initializing\n");
+			return 1;
+		}
 
-		/* We always should have BAR0 mapped */
-		if (rte_eal_process_type() == RTE_PROC_PRIMARY && 
-			dev->mem_resource[0].addr == NULL) {
-			RTE_LOG(ERR, EAL,
-				"%s(): BAR0 is not mapped\n",
-				__func__);
-			return (-1);
+		if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING) {
+			/* map resources for devices that use igb_uio */
+			ret = pci_map_device(dev);
+			if (ret != 0)
+				return ret;
+		} else if (dr->drv_flags & RTE_PCI_DRV_FORCE_UNBIND &&
+		           rte_eal_process_type() == RTE_PROC_PRIMARY) {
+			/* unbind current driver */
+			if (pci_unbind_kernel_driver(dev) < 0)
+				return -1;
 		}
- 
+
 		/* reference driver structure */
 		dev->driver = dr;
 
 		/* call the driver devinit() function */
 		return dr->devinit(dr, dev);
 	}
-	return -1;
-}
-
-/*Start the exit process for each dev in use*/
-void
-rte_eal_pci_exit(void)
-{
-	struct rte_pci_device *dev = NULL;
-
-	TAILQ_FOREACH(dev, &device_list, next){
-		if (dev->previous_dr[0] == '\0')
-			continue;
-		if(pci_exit_process(dev) == 1)
-			RTE_LOG(ERR, EAL, "Exit process failure\n");
-	}
+	/* return positive value if driver is not found */
+	return 1;
 }
 
 /* Init the PCI EAL subsystem */
 int
 rte_eal_pci_init(void)
 {
-	TAILQ_INIT(&driver_list);
-	TAILQ_INIT(&device_list);
-	uio_res_list = RTE_TAILQ_RESERVE_BY_IDX(RTE_TAILQ_PCI, uio_res_list);
+	TAILQ_INIT(&pci_driver_list);
+	TAILQ_INIT(&pci_device_list);
+	pci_res_list = RTE_TAILQ_RESERVE_BY_IDX(RTE_TAILQ_PCI,
+			mapped_pci_res_list);
 
 	/* for debug purposes, PCI can be disabled */
 	if (internal_config.no_pci)
@@ -1005,5 +498,21 @@ rte_eal_pci_init(void)
 		RTE_LOG(ERR, EAL, "%s(): Cannot scan PCI bus\n", __func__);
 		return -1;
 	}
+#ifdef VFIO_PRESENT
+	pci_vfio_enable();
+
+	if (pci_vfio_is_enabled()) {
+
+		/* if we are primary process, create a thread to communicate with
+		 * secondary processes. the thread will use a socket to wait for
+		 * requests from secondary process to send open file descriptors,
+		 * because VFIO does not allow multiple open descriptors on a group or
+		 * VFIO container.
+		 */
+		if (internal_config.process_type == RTE_PROC_PRIMARY &&
+				pci_vfio_mp_sync_setup() < 0)
+			return -1;
+	}
+#endif
 	return 0;
 }