X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Flibrte_eal%2Flinuxapp%2Feal%2Feal_pci.c;h=434697323c00a85d3e7b82fe3327f398681a4a4d;hb=756ce64b1ecdf107acfa45fc3f31359ca338649e;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..434697323c 100644
--- a/lib/librte_eal/linuxapp/eal/eal_pci.c
+++ b/lib/librte_eal/linuxapp/eal/eal_pci.c
@@ -1,521 +1,196 @@
 /*-
  *   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_memcpy.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.
+ * 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).
  */
 
-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.
- */
-static int
-pci_uio_check_module(const char *module_name)
-{
-	FILE *f;
-	unsigned i;
-	char buf[BUFSIZ];
-
-	if (module_name == NULL)
-		return 0;
-
-	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 */
-static int
-pci_bind_device(struct rte_pci_device *dev, char dr_path[])
+/* unbind kernel driver for this device */
+int
+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 */
+	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);
+	n = 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, "Cannot rte_snprintf PCI infos\n");
-		fclose(f);
-		return -1;
+		RTE_LOG(ERR, EAL, "%s(): 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;
+
+error:
+	fclose(f);
+	return -1;
 }
 
 static int
-pci_uio_bind_device(struct rte_pci_device *dev, const char *module_name)
+pci_get_kernel_driver_by_path(const char *filename, char *dri_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;
-	}
+	int count;
+	char path[PATH_MAX];
+	char *name;
 
-	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");
+	if (!filename || !dri_name)
 		return -1;
-	}
 
-	f = fopen(uio_newid, "w");
-	if (f == NULL) {
-		RTE_LOG(ERR, EAL, "Cannot open %s\n", uio_newid);
+	count = readlink(filename, path, PATH_MAX);
+	if (count >= PATH_MAX)
 		return -1;
-	}
-	if (fwrite(buf, n, 1, f) == 0) {
-		fclose(f);
-		return -1;
-	}
-	fclose(f);
 
-	pci_bind_device(dev, uio_bind);
-	return 0;
-}
+	/* For device does not have a driver */
+	if (count < 0)
+		return 1;
 
+	path[count] = '\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 *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;
+	name = strrchr(path, '/');
+	if (name) {
+		strncpy(dri_name, name + 1, strlen(name + 1) + 1);
+		return 0;
 	}
 
-	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;
+	return -1;
 }
 
-#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)
+/* Map pci device */
+int
+rte_eal_pci_map_device(struct rte_pci_device *dev)
 {
-	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);
+	int ret = -1;
+
+	/* try mapping the NIC resources using VFIO if it exists */
+	switch (dev->kdrv) {
+	case RTE_KDRV_VFIO:
+#ifdef VFIO_PRESENT
+		if (pci_vfio_is_enabled())
+			ret = pci_vfio_map_resource(dev);
+#endif
+		break;
+	case RTE_KDRV_IGB_UIO:
+	case RTE_KDRV_UIO_GENERIC:
+		/* 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;
 }
 
-static int
-pci_uio_map_secondary(struct rte_pci_device *dev)
+/* Unmap pci device */
+void
+rte_eal_pci_unmap_device(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);
+	/* try unmapping the NIC resources using VFIO if it exists */
+	switch (dev->kdrv) {
+	case RTE_KDRV_VFIO:
+		RTE_LOG(ERR, EAL, "Hotplug doesn't support vfio yet\n");
+		break;
+	case RTE_KDRV_IGB_UIO:
+	case RTE_KDRV_UIO_GENERIC:
+		/* 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;
 	}
-
-	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)
+void *
+pci_find_max_end_va(void)
 {
-	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);
+	const struct rte_memseg *seg = rte_eal_get_physmem_layout();
+	const struct rte_memseg *last = seg;
+	unsigned i = 0;
 
-	/* 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);
+	for (i = 0; i < RTE_MAX_MEMSEG; i++, seg++) {
+		if (seg->addr == NULL)
 			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;
-	}
+		if (seg->addr > last->addr)
+			last = seg;
 
-	/* 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);
+	return RTE_PTR_ADD(last->addr, last->len);
 }
 
 /* parse the "resource" sysfs file */
-#define IORESOURCE_MEM  0x00000200
-
 static int
 pci_parse_sysfs_resource(const char *filename, struct rte_pci_device *dev)
 {
@@ -541,12 +216,14 @@ 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 +231,8 @@ 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 +240,7 @@ 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);
@@ -573,55 +251,6 @@ 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;
-
-        if (dev_addr > dev_addr2) 
-                return 1;	
-        else 
-                return 0;
-}
-
-
 /* Scan one pci sysfs entry, and fill the devices list from it. */
 static int
 pci_scan_one(const char *dirname, uint16_t domain, uint8_t bus,
@@ -630,11 +259,12 @@ pci_scan_one(const char *dirname, uint16_t domain, uint8_t bus,
 	char filename[PATH_MAX];
 	unsigned long tmp;
 	struct rte_pci_device *dev;
+	char driver[PATH_MAX];
+	int ret;
 
 	dev = malloc(sizeof(*dev));
-	if (dev == NULL) {
+	if (dev == NULL)
 		return -1;
-	}
 
 	memset(dev, 0, sizeof(*dev));
 	dev->addr.domain = domain;
@@ -643,7 +273,7 @@ pci_scan_one(const char *dirname, uint16_t domain, uint8_t bus,
 	dev->addr.function = function;
 
 	/* get vendor id */
-	rte_snprintf(filename, sizeof(filename), "%s/vendor", dirname);
+	snprintf(filename, sizeof(filename), "%s/vendor", dirname);
 	if (eal_parse_sysfs_value(filename, &tmp) < 0) {
 		free(dev);
 		return -1;
@@ -651,7 +281,7 @@ pci_scan_one(const char *dirname, uint16_t domain, uint8_t bus,
 	dev->id.vendor_id = (uint16_t)tmp;
 
 	/* get device id */
-	rte_snprintf(filename, sizeof(filename), "%s/device", dirname);
+	snprintf(filename, sizeof(filename), "%s/device", dirname);
 	if (eal_parse_sysfs_value(filename, &tmp) < 0) {
 		free(dev);
 		return -1;
@@ -659,7 +289,7 @@ pci_scan_one(const char *dirname, uint16_t domain, uint8_t bus,
 	dev->id.device_id = (uint16_t)tmp;
 
 	/* get subsystem_vendor id */
-	rte_snprintf(filename, sizeof(filename), "%s/subsystem_vendor",
+	snprintf(filename, sizeof(filename), "%s/subsystem_vendor",
 		 dirname);
 	if (eal_parse_sysfs_value(filename, &tmp) < 0) {
 		free(dev);
@@ -668,7 +298,7 @@ pci_scan_one(const char *dirname, uint16_t domain, uint8_t bus,
 	dev->id.subsystem_vendor_id = (uint16_t)tmp;
 
 	/* get subsystem_device id */
-	rte_snprintf(filename, sizeof(filename), "%s/subsystem_device",
+	snprintf(filename, sizeof(filename), "%s/subsystem_device",
 		 dirname);
 	if (eal_parse_sysfs_value(filename, &tmp) < 0) {
 		free(dev);
@@ -676,32 +306,90 @@ 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;
+	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;
+	else {
+		/* for non igb_uio driver, need kernel version >= 3.8 */
+		snprintf(filename, sizeof(filename),
+			 "%s/sriov_numvfs", dirname);
+		if (!access(filename, F_OK) &&
+		    eal_parse_sysfs_value(filename, &tmp) == 0)
+			dev->max_vfs = (uint16_t)tmp;
+	}
+
+	/* get numa node */
+	snprintf(filename, sizeof(filename), "%s/numa_node",
+		 dirname);
+	if (access(filename, R_OK) != 0) {
+		/* if no NUMA support, set default to 0 */
+		dev->numa_node = 0;
+	} 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);
+	snprintf(filename, sizeof(filename), "%s/resource", dirname);
 	if (pci_parse_sysfs_resource(filename, dev) < 0) {
 		RTE_LOG(ERR, EAL, "%s(): cannot parse resource\n", __func__);
 		free(dev);
 		return -1;
 	}
 
-	/* device is valid, add in list (sorted) */
-	if (TAILQ_EMPTY(&device_list)) {
-		TAILQ_INSERT_TAIL(&device_list, dev, next);
-	}	
-	else {
-		struct rte_pci_device *dev2 = NULL;
+	/* parse driver */
+	snprintf(filename, sizeof(filename), "%s/driver", dirname);
+	ret = pci_get_kernel_driver_by_path(filename, driver);
+	if (ret < 0) {
+		RTE_LOG(ERR, EAL, "Fail to get kernel driver\n");
+		free(dev);
+		return -1;
+	}
 
-		TAILQ_FOREACH(dev2, &device_list, next) {
-			if (pci_addr_comparison(&dev->addr, &dev2->addr))
+	if (!ret) {
+		if (!strcmp(driver, "vfio-pci"))
+			dev->kdrv = RTE_KDRV_VFIO;
+		else if (!strcmp(driver, "igb_uio"))
+			dev->kdrv = RTE_KDRV_IGB_UIO;
+		else if (!strcmp(driver, "uio_pci_generic"))
+			dev->kdrv = RTE_KDRV_UIO_GENERIC;
+		else
+			dev->kdrv = RTE_KDRV_UNKNOWN;
+	} else
+		dev->kdrv = RTE_KDRV_UNKNOWN;
+
+	/* 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;
+		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(&device_list, dev, next);
+		TAILQ_INSERT_TAIL(&pci_device_list, dev, next);
 	}
-				
+
 	return 0;
 }
 
@@ -756,8 +444,8 @@ error:
  * Scan the content of the PCI bus, and the devices in the devices
  * list
  */
-static int
-pci_scan(void)
+int
+rte_eal_pci_scan(void)
 {
 	struct dirent *e;
 	DIR *dir;
@@ -780,7 +468,7 @@ pci_scan(void)
 				&bus, &devid, &function) != 0)
 			continue;
 
-		rte_snprintf(dirname, sizeof(dirname), "%s/%s", SYSFS_PCI_DEVICES,
+		snprintf(dirname, sizeof(dirname), "%s/%s", SYSFS_PCI_DEVICES,
 			 e->d_name);
 		if (pci_scan_one(dirname, domain, bus, devid, function) < 0)
 			goto error;
@@ -793,217 +481,346 @@ error:
 	return -1;
 }
 
-/* unbind kernel driver for this device */
+#ifdef RTE_PCI_CONFIG
 static int
-pci_unbind_kernel_driver(struct rte_pci_device *dev)
+pci_config_extended_tag(struct rte_pci_device *dev)
 {
-	int n;
-	FILE *f;
+	struct rte_pci_addr *loc = &dev->addr;
 	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);
+	FILE *f;
 
-	f = fopen(filename, "w");
-	if (f == NULL) /* device was not bound */
+	/* not configured, let it as is */
+	if (strncmp(RTE_PCI_EXTENDED_TAG, "on", 2) != 0 &&
+		strncmp(RTE_PCI_EXTENDED_TAG, "off", 3) != 0)
 		return 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;
-	}
+	snprintf(filename, sizeof(filename),
+		SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/" "extended_tag",
+		loc->domain, loc->bus, loc->devid, loc->function);
+	f = fopen(filename, "rw+");
+	if (!f)
+		return -1;
 
+	fgets(buf, sizeof(buf), f);
+	if (strncmp(RTE_PCI_EXTENDED_TAG, "on", 2) == 0) {
+		/* enable Extended Tag*/
+		if (strncmp(buf, "on", 2) != 0) {
+			fseek(f, 0, SEEK_SET);
+			fputs("on", f);
+		}
+	} else {
+		/* disable Extended Tag */
+		if (strncmp(buf, "off", 3) != 0) {
+			fseek(f, 0, SEEK_SET);
+			fputs("off", f);
+		}
+	}
 	fclose(f);
-	return 0;
 
-error:
-	fclose(f);
-	return -1;
+	return 0;
 }
 
 static int
-pci_exit_process(struct rte_pci_device *dev)
+pci_config_max_read_request_size(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");
+	struct rte_pci_addr *loc = &dev->addr;
+	char filename[PATH_MAX];
+	char buf[BUFSIZ], param[BUFSIZ];
+	FILE *f;
+	/* size can be 128, 256, 512, 1024, 2048, 4096 */
+	uint32_t max_size = RTE_PCI_MAX_READ_REQUEST_SIZE;
+
+	/* not configured, let it as is */
+	if (!max_size)
+		return 0;
+
+	snprintf(filename, sizeof(filename),
+		SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/" "max_read_request_size",
+			loc->domain, loc->bus, loc->devid, loc->function);
+	f = fopen(filename, "rw+");
+	if (!f)
 		return -1;
+
+	fgets(buf, sizeof(buf), f);
+	snprintf(param, sizeof(param), "%d", max_size);
+
+	/* check if the size to be set is the same as current */
+	if (strcmp(buf, param) == 0) {
+		fclose(f);
+		return 0;
 	}
-	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;
-		}
-	}
+	fseek(f, 0, SEEK_SET);
+	fputs(param, f);
+	fclose(f);
 
 	return 0;
 }
 
-static void
-pci_get_previous_driver_path(struct rte_pci_device *dev)
+void
+pci_config_space_set(struct rte_pci_device *dev)
 {
-	int n;
-	char dev_path[PATH_MAX];
-	char dr_path[PATH_MAX];
-	struct rte_pci_addr *loc = &dev->addr;
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+		return;
 
-	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");
+	/* configure extended tag */
+	pci_config_extended_tag(dev);
 
-	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;
+	/* configure max read request size */
+	pci_config_max_read_request_size(dev);
+}
+#endif
+
+/* Read PCI config space. */
+int rte_eal_pci_read_config(const struct rte_pci_device *device,
+			    void *buf, size_t len, off_t offset)
+{
+	const struct rte_intr_handle *intr_handle = &device->intr_handle;
+
+	switch (intr_handle->type) {
+	case RTE_INTR_HANDLE_UIO:
+	case RTE_INTR_HANDLE_UIO_INTX:
+		return pci_uio_read_config(intr_handle, buf, len, offset);
+
+#ifdef VFIO_PRESENT
+	case RTE_INTR_HANDLE_VFIO_MSIX:
+	case RTE_INTR_HANDLE_VFIO_MSI:
+	case RTE_INTR_HANDLE_VFIO_LEGACY:
+		return pci_vfio_read_config(intr_handle, buf, len, offset);
+#endif
+	default:
+		RTE_LOG(ERR, EAL,
+			"Unknown handle type of fd %d\n",
+					intr_handle->fd);
+		return -1;
 	}
-	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.
- */
-int
-rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr, struct rte_pci_device *dev)
+/* Write PCI config space. */
+int rte_eal_pci_write_config(const struct rte_pci_device *device,
+			     const void *buf, size_t len, off_t offset)
+{
+	const struct rte_intr_handle *intr_handle = &device->intr_handle;
+
+	switch (intr_handle->type) {
+	case RTE_INTR_HANDLE_UIO:
+	case RTE_INTR_HANDLE_UIO_INTX:
+		return pci_uio_write_config(intr_handle, buf, len, offset);
+
+#ifdef VFIO_PRESENT
+	case RTE_INTR_HANDLE_VFIO_MSIX:
+	case RTE_INTR_HANDLE_VFIO_MSI:
+	case RTE_INTR_HANDLE_VFIO_LEGACY:
+		return pci_vfio_write_config(intr_handle, buf, len, offset);
+#endif
+	default:
+		RTE_LOG(ERR, EAL,
+			"Unknown handle type of fd %d\n",
+					intr_handle->fd);
+		return -1;
+	}
+}
+
+#if defined(RTE_ARCH_X86_64) || defined(RTE_ARCH_I686)
+static int
+pci_ioport_map(struct rte_pci_device *dev, int bar __rte_unused,
+	       struct rte_pci_ioport *p)
 {
-	struct rte_pci_id *id_table;
-	const char *module_name = NULL;
-	int uio_status = -1;
+	uint16_t start, end;
+	FILE *fp;
+	char *line = NULL;
+	char pci_id[16];
+	int found = 0;
+	size_t linesz;
+
+	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;
+	}
 
-	if (dr->drv_flags & RTE_PCI_DRV_NEED_IGB_UIO)
-		module_name = IGB_UIO_NAME;
+	while (getdelim(&line, &linesz, '\n', fp) > 0) {
+		char *ptr = line;
+		char *left;
+		int n;
 
-	for (id_table = dr->id_table ; id_table->vendor_id != 0; id_table++) {
+		n = strcspn(ptr, ":");
+		ptr[n] = 0;
+		left = &ptr[n + 1];
 
-		/* check if device's identifiers match the driver's ones */
-		if (id_table->vendor_id != dev->id.vendor_id &&
-				id_table->vendor_id != PCI_ANY_ID)
-			continue;
-		if (id_table->device_id != dev->id.device_id &&
-				id_table->device_id != PCI_ANY_ID)
-			continue;
-		if (id_table->subsystem_vendor_id != dev->id.subsystem_vendor_id &&
-				id_table->subsystem_vendor_id != PCI_ANY_ID)
-			continue;
-		if (id_table->subsystem_device_id != dev->id.subsystem_device_id &&
-				id_table->subsystem_device_id != PCI_ANY_ID)
-			continue;
+		while (*left && isspace(*left))
+			left++;
 
-		RTE_LOG(DEBUG, EAL, "probe driver: %x:%x %s\n", dev->id.vendor_id,
-				dev->id.device_id, dr->name);
+		if (!strncmp(left, pci_id, strlen(pci_id))) {
+			found = 1;
 
-		/* reference driver structure */
-		dev->driver = dr;
+			while (*ptr && isspace(*ptr))
+				ptr++;
 
-		/* no initialization when blacklisted, return without error */
-		if (dev->blacklisted)
-			return 0;
+			sscanf(ptr, "%04hx-%04hx", &start, &end);
 
-		/* 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;
+			break;
+		}
+	}
+
+	free(line);
+	fclose(fp);
+
+	if (!found)
+		return -1;
+
+	dev->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
+	p->base = start;
+	RTE_LOG(DEBUG, EAL, "PCI Port IO found start=0x%x\n", start);
+
+	return 0;
+}
+#endif
+
+int
+rte_eal_pci_ioport_map(struct rte_pci_device *dev, int bar,
+		       struct rte_pci_ioport *p)
+{
+	int ret;
+
+	switch (dev->kdrv) {
+#ifdef VFIO_PRESENT
+	case RTE_KDRV_VFIO:
+		ret = -1;
+		if (pci_vfio_is_enabled())
+			ret = pci_vfio_ioport_map(dev, bar, p);
+		break;
+#endif
+	case RTE_KDRV_IGB_UIO:
+	case RTE_KDRV_UIO_GENERIC:
+		ret = pci_uio_ioport_map(dev, bar, p);
+		break;
+	default:
+#if defined(RTE_ARCH_X86_64) || defined(RTE_ARCH_I686)
+		/* special case for x86 ... */
+		ret = pci_ioport_map(dev, bar, p);
 #else
-		/* just map the NIC resources */
-		if (pci_uio_map_resource(dev) < 0)
-			return -1;
+		ret = -1;
 #endif
+		break;
+	}
 
-		/* 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);
-		}
- 
-		/* reference driver structure */
-		dev->driver = dr;
+	if (!ret)
+		p->dev = dev;
 
-		/* call the driver devinit() function */
-		return dr->devinit(dr, dev);
+	return ret;
+}
+
+void
+rte_eal_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_KDRV_VFIO:
+		pci_vfio_ioport_read(p, data, len, offset);
+		break;
+#endif
+	case RTE_KDRV_IGB_UIO:
+	case RTE_KDRV_UIO_GENERIC:
+		pci_uio_ioport_read(p, data, len, offset);
+		break;
+	default:
+#if defined(RTE_ARCH_X86_64) || defined(RTE_ARCH_I686)
+		/* special case for x86 ... */
+		pci_uio_ioport_read(p, data, len, offset);
+#endif
+		break;
 	}
-	return -1;
 }
 
-/*Start the exit process for each dev in use*/
 void
-rte_eal_pci_exit(void)
+rte_eal_pci_ioport_write(struct rte_pci_ioport *p,
+			 const void *data, size_t len, off_t offset)
 {
-	struct rte_pci_device *dev = NULL;
+	switch (p->dev->kdrv) {
+#ifdef VFIO_PRESENT
+	case RTE_KDRV_VFIO:
+		pci_vfio_ioport_write(p, data, len, offset);
+		break;
+#endif
+	case RTE_KDRV_IGB_UIO:
+	case RTE_KDRV_UIO_GENERIC:
+		pci_uio_ioport_write(p, data, len, offset);
+		break;
+	default:
+#if defined(RTE_ARCH_X86_64) || defined(RTE_ARCH_I686)
+		/* special case for x86 ... */
+		pci_uio_ioport_write(p, data, len, offset);
+#endif
+		break;
+	}
+}
 
-	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");
+int
+rte_eal_pci_ioport_unmap(struct rte_pci_ioport *p)
+{
+	int ret;
+
+	switch (p->dev->kdrv) {
+#ifdef VFIO_PRESENT
+	case RTE_KDRV_VFIO:
+		ret = -1;
+		if (pci_vfio_is_enabled())
+			ret = pci_vfio_ioport_unmap(p);
+		break;
+#endif
+	case RTE_KDRV_IGB_UIO:
+	case RTE_KDRV_UIO_GENERIC:
+		ret = pci_uio_ioport_unmap(p);
+		break;
+	default:
+#if defined(RTE_ARCH_X86_64) || defined(RTE_ARCH_I686)
+		/* special case for x86 ... nothing to do */
+		ret = 0;
+#else
+		ret = -1;
+#endif
+		break;
 	}
+
+	return ret;
 }
 
 /* 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);
 
 	/* for debug purposes, PCI can be disabled */
 	if (internal_config.no_pci)
 		return 0;
 
-	if (pci_scan() < 0) {
+	if (rte_eal_pci_scan() < 0) {
 		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;
 }