Signed-off-by: Anatoly Burakov <anatoly.burakov at intel.com>
---
lib/librte_eal/linuxapp/eal/Makefile | 1 +
lib/librte_eal/linuxapp/eal/eal_pci.c | 403 +--------------------
lib/librte_eal/linuxapp/eal/eal_pci_uio.c | 403 +++++++++++++++++++++
lib/librte_eal/linuxapp/eal/include/eal_pci_init.h | 66 ++++
4 files changed, 474 insertions(+), 399 deletions(-)
create mode 100644 lib/librte_eal/linuxapp/eal/eal_pci_uio.c
create mode 100644 lib/librte_eal/linuxapp/eal/include/eal_pci_init.h
diff --git a/lib/librte_eal/linuxapp/eal/Makefile
b/lib/librte_eal/linuxapp/eal/Makefile
index b00e3ec..527fa2a 100644
--- a/lib/librte_eal/linuxapp/eal/Makefile
+++ b/lib/librte_eal/linuxapp/eal/Makefile
@@ -57,6 +57,7 @@ endif
SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_thread.c
SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_log.c
SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_pci.c
+SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_pci_uio.c
SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_debug.c
SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_lcore.c
SRCS-$(CONFIG_RTE_LIBRTE_EAL_LINUXAPP) += eal_timer.c
diff --git a/lib/librte_eal/linuxapp/eal/eal_pci.c
b/lib/librte_eal/linuxapp/eal/eal_pci.c
index fd88bd0..628813b 100644
--- a/lib/librte_eal/linuxapp/eal/eal_pci.c
+++ b/lib/librte_eal/linuxapp/eal/eal_pci.c
@@ -32,8 +32,6 @@
*/
#include <string.h>
-#include <sys/stat.h>
-#include <fcntl.h>
#include <dirent.h>
#include <sys/mman.h>
@@ -47,6 +45,7 @@
#include "rte_pci_dev_ids.h"
#include "eal_filesystem.h"
#include "eal_private.h"
+#include "eal_pci_init.h"
/**
* @file
@@ -57,30 +56,7 @@
* IGB_UIO driver (or doesn't initialize, if the device wasn't bound to it).
*/
-struct pci_map {
- void *addr;
- uint64_t offset;
- uint64_t size;
- uint64_t phaddr;
-};
-
-/*
- * For multi-process we need to reproduce all PCI mappings in secondary
- * processes, so save them in a tailq.
- */
-struct mapped_pci_resource {
- TAILQ_ENTRY(mapped_pci_resource) next;
-
- struct rte_pci_addr pci_addr;
- char path[PATH_MAX];
- int nb_maps;
- struct pci_map maps[PCI_MAX_RESOURCE];
-};
-
-TAILQ_HEAD(mapped_pci_res_list, mapped_pci_resource);
-static struct mapped_pci_res_list *pci_res_list;
-
-static int pci_parse_sysfs_value(const char *filename, uint64_t *val);
+struct mapped_pci_res_list *pci_res_list = NULL;
/* unbind kernel driver for this device */
static int
@@ -122,8 +98,8 @@ error:
}
/* map a particular resource from a file */
-static void *
-pci_map_resource(void *requested_addr, int fd, off_t offset, size_t size)
+void *
+pci_map_resource(void * requested_addr, int fd, off_t offset, size_t size)
{
void *mapaddr;
@@ -147,342 +123,6 @@ fail:
return NULL;
}
-#define OFF_MAX ((uint64_t)(off_t)-1)
-static int
-pci_uio_get_mappings(const char *devname, struct pci_map maps[], int nb_maps)
-{
- int 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)
-{
- int fd, i;
- struct mapped_pci_resource *uio_res;
-
- TAILQ_FOREACH(uio_res, pci_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++) {
- /*
- * open devname, to mmap it
- */
- fd = open(uio_res->path, O_RDWR);
- if (fd < 0) {
- RTE_LOG(ERR, EAL, "Cannot open %s: %s\n",
- uio_res->path, strerror(errno));
- return -1;
- }
-
- if (pci_map_resource(uio_res->maps[i].addr, fd,
- (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");
- close(fd);
- return (-1);
- }
- /* fd is not needed in slave process, close it */
- close(fd);
- }
- return (0);
- }
-
- RTE_LOG(ERR, EAL, "Cannot find resource for device\n");
- return -1;
-}
-
-static int
-pci_mknod_uio_dev(const char *sysfs_uio_path, unsigned uio_num)
-{
- FILE *f;
- char filename[PATH_MAX];
- int ret;
- unsigned major, minor;
- dev_t dev;
-
- /* get the name of the sysfs file that contains the major and minor
- * of the uio device and read its content */
- rte_snprintf(filename, sizeof(filename), "%s/dev", sysfs_uio_path);
-
- f = fopen(filename, "r");
- if (f == NULL) {
- RTE_LOG(ERR, EAL, "%s(): cannot open sysfs to get
major:minor\n",
- __func__);
- return -1;
- }
-
- ret = fscanf(f, "%d:%d", &major, &minor);
- if (ret != 2) {
- RTE_LOG(ERR, EAL, "%s(): cannot parse sysfs to get
major:minor\n",
- __func__);
- fclose(f);
- return -1;
- }
- fclose(f);
-
- /* create the char device "mknod /dev/uioX c major minor" */
- rte_snprintf(filename, sizeof(filename), "/dev/uio%u", uio_num);
- dev = makedev(major, minor);
- ret = mknod(filename, S_IFCHR | S_IRUSR | S_IWUSR, dev);
- if (f == NULL) {
- RTE_LOG(ERR, EAL, "%s(): mknod() failed %s\n",
- __func__, strerror(errno));
- return -1;
- }
-
- return ret;
-}
-
-/*
- * Return the uioX char device used for a pci device. On success, return
- * the UIO number and fill dstbuf string with the path of the device in
- * sysfs. On error, return a negative value. In this case dstbuf is
- * invalid.
- */
-static int
-pci_get_uio_dev(struct rte_pci_device *dev, char *dstbuf,
- unsigned int buflen)
-{
- struct rte_pci_addr *loc = &dev->addr;
- unsigned int uio_num;
- struct dirent *e;
- DIR *dir;
- char dirname[PATH_MAX];
-
- /* depending on kernel version, uio can be located in uio/uioX
- * or uio:uioX */
-
- rte_snprintf(dirname, sizeof(dirname),
- SYSFS_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),
- SYSFS_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) {
- /* format could be uio%d ...*/
- int shortprefix_len = sizeof("uio") - 1;
- /* ... or uio:uio%d */
- int longprefix_len = sizeof("uio:uio") - 1;
- 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 + shortprefix_len)) {
- rte_snprintf(dstbuf, buflen, "%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 + longprefix_len)) {
- rte_snprintf(dstbuf, buflen, "%s/uio:uio%u", dirname,
uio_num);
- break;
- }
- }
- closedir(dir);
-
- /* No uio resource found */
- if (e == NULL)
- return -1;
-
- /* create uio device if we've been asked to */
- if (internal_config.create_uio_dev && pci_mknod_uio_dev(dstbuf,
uio_num) < 0)
- RTE_LOG(WARNING, EAL, "Cannot create /dev/uio%u\n", uio_num);
-
- return uio_num;
-}
-
-/* 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;
- char dirname[PATH_MAX];
- char devname[PATH_MAX]; /* contains the /dev/uioX */
- void *mapaddr;
- int uio_num;
- uint64_t phaddr;
- uint64_t offset;
- uint64_t pagesz;
- int nb_maps;
- struct rte_pci_addr *loc = &dev->addr;
- struct mapped_pci_resource *uio_res;
- struct pci_map *maps;
-
- dev->intr_handle.fd = -1;
- dev->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
-
- /* secondary processes - use already recorded details */
- if (rte_eal_process_type() != RTE_PROC_PRIMARY)
- return (pci_uio_map_secondary(dev));
-
- /* find uio resource */
- uio_num = pci_get_uio_dev(dev, dirname, sizeof(dirname));
- if (uio_num < 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;
- }
- rte_snprintf(devname, sizeof(devname), "/dev/uio%u", uio_num);
-
- /* 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));
- return -1;
- }
- dev->intr_handle.type = RTE_INTR_HANDLE_UIO;
-
- /* 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(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 */
- nb_maps = pci_uio_get_mappings(dirname, uio_res->maps,
- RTE_DIM(uio_res->maps));
- if (nb_maps < 0) {
- rte_free(uio_res);
- 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++) {
- int fd;
-
- /* 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;
-
- /*
- * open devname, to mmap it
- */
- fd = open(devname, O_RDWR);
- if (fd < 0) {
- RTE_LOG(ERR, EAL, "Cannot open %s: %s\n",
- devname, strerror(errno));
- return -1;
- }
-
- if (maps[j].addr != NULL ||
- (mapaddr = pci_map_resource(NULL, fd,
- (off_t)offset,
- (size_t)maps[j].size)
- ) == NULL) {
- rte_free(uio_res);
- close(fd);
- return (-1);
- }
- close(fd);
-
- maps[j].addr = mapaddr;
- maps[j].offset = offset;
- dev->mem_resource[i].addr = mapaddr;
- }
- }
-
- TAILQ_INSERT_TAIL(pci_res_list, uio_res, next);
-
- return (0);
-}
-
/* parse the "resource" sysfs file */
#define IORESOURCE_MEM 0x00000200
@@ -546,41 +186,6 @@ 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)
diff --git a/lib/librte_eal/linuxapp/eal/eal_pci_uio.c
b/lib/librte_eal/linuxapp/eal/eal_pci_uio.c
new file mode 100644
index 0000000..61f09cc
--- /dev/null
+++ b/lib/librte_eal/linuxapp/eal/eal_pci_uio.c
@@ -0,0 +1,403 @@
+/*-
+ * 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 <string.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <sys/stat.h>
+
+#include <rte_log.h>
+#include <rte_pci.h>
+#include <rte_common.h>
+#include <rte_malloc.h>
+#include <rte_tailq.h>
+
+#include "rte_pci_dev_ids.h"
+#include "eal_filesystem.h"
+#include "eal_pci_init.h"
+
+static int pci_parse_sysfs_value(const char *filename, uint64_t *val);
+
+#define OFF_MAX ((uint64_t)(off_t)-1)
+static int
+pci_uio_get_mappings(const char *devname, struct pci_map maps[], int nb_maps) {
+ int 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) {
+ int fd, i;
+ struct mapped_pci_resource *uio_res;
+
+ TAILQ_FOREACH(uio_res, pci_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++) {
+ /*
+ * open devname, to mmap it
+ */
+ fd = open(uio_res->path, O_RDWR);
+ if (fd < 0) {
+ RTE_LOG(ERR, EAL,
+ "Cannot open %s: %s\n",
uio_res->path, strerror(errno));
+ return -1;
+ }
+
+ if (pci_map_resource(uio_res->maps[i].addr, fd,
+ (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");
+ close(fd);
+ return (-1);
+ }
+ /* fd is not needed in slave process, close it */
+ close(fd);
+ }
+ return (0);
+ }
+
+ RTE_LOG(ERR, EAL, "Cannot find resource for device\n");
+ return -1;
+}
+
+static int
+pci_mknod_uio_dev(const char *sysfs_uio_path, unsigned uio_num) {
+ FILE *f;
+ char filename[PATH_MAX];
+ int ret;
+ unsigned major, minor;
+ dev_t dev;
+
+ /* get the name of the sysfs file that contains the major and minor
+ * of the uio device and read its content */
+ rte_snprintf(filename, sizeof(filename), "%s/dev", sysfs_uio_path);
+
+ f = fopen(filename, "r");
+ if (f == NULL) {
+ RTE_LOG(ERR, EAL,
+ "%s(): cannot open sysfs to get major:minor\n",
__func__);
+ return -1;
+ }
+
+ ret = fscanf(f, "%d:%d", &major, &minor);
+ if (ret != 2) {
+ RTE_LOG(ERR, EAL,
+ "%s(): cannot parse sysfs to get
major:minor\n", __func__);
+ fclose(f);
+ return -1;
+ }
+ fclose(f);
+
+ /* create the char device "mknod /dev/uioX c major minor" */
+ rte_snprintf(filename, sizeof(filename), "/dev/uio%u", uio_num);
+ dev = makedev(major, minor);
+ ret = mknod(filename, S_IFCHR | S_IRUSR | S_IWUSR, dev);
+ if (f == NULL) {
+ RTE_LOG(ERR, EAL,
+ "%s(): mknod() failed %s\n", __func__,
strerror(errno));
+ return -1;
+ }
+
+ return ret;
+}
+
+/*
+ * Return the uioX char device used for a pci device. On success, return
+ * the UIO number and fill dstbuf string with the path of the device in
+ * sysfs. On error, return a negative value. In this case dstbuf is
+ * invalid.
+ */
+static int
+pci_get_uio_dev(struct rte_pci_device *dev, char *dstbuf,
+ unsigned int buflen) {
+ struct rte_pci_addr *loc = &dev->addr;
+ unsigned int uio_num;
+ struct dirent *e;
+ DIR *dir;
+ char dirname[PATH_MAX];
+
+ /* depending on kernel version, uio can be located in uio/uioX
+ * or uio:uioX */
+
+ rte_snprintf(dirname, sizeof(dirname),
+ SYSFS_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),
+ SYSFS_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) {
+ /* format could be uio%d ...*/
+ int shortprefix_len = sizeof("uio") - 1;
+ /* ... or uio:uio%d */
+ int longprefix_len = sizeof("uio:uio") - 1;
+ 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 + shortprefix_len)) {
+ rte_snprintf(dstbuf, buflen, "%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 + longprefix_len)) {
+ rte_snprintf(dstbuf, buflen, "%s/uio:uio%u", dirname,
uio_num);
+ break;
+ }
+ }
+ closedir(dir);
+
+ /* No uio resource found */
+ if (e == NULL)
+ return -1;
+
+ /* create uio device if we've been asked to */
+ if (internal_config.create_uio_dev
+ && pci_mknod_uio_dev(dstbuf, uio_num) < 0)
+ RTE_LOG(WARNING, EAL, "Cannot create /dev/uio%u\n", uio_num);
+
+ return uio_num;
+}
+
+/* map the PCI resource of a PCI device in virtual memory */
+int
+pci_uio_map_resource(struct rte_pci_device *dev) {
+ int i, j;
+ char dirname[PATH_MAX];
+ char devname[PATH_MAX]; /* contains the /dev/uioX */
+ void *mapaddr;
+ int uio_num;
+ uint64_t phaddr;
+ uint64_t offset;
+ uint64_t pagesz;
+ int nb_maps;
+ struct rte_pci_addr *loc = &dev->addr;
+ struct mapped_pci_resource *uio_res;
+ struct pci_map *maps;
+
+ dev->intr_handle.fd = -1;
+ dev->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
+
+ /* secondary processes - use already recorded details */
+ if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+ return (pci_uio_map_secondary(dev));
+
+ /* find uio resource */
+ uio_num = pci_get_uio_dev(dev, dirname, sizeof(dirname));
+ if (uio_num < 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;
+ }
+ rte_snprintf(devname, sizeof(devname), "/dev/uio%u", uio_num);
+
+ /* 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));
+ return -1;
+ }
+ dev->intr_handle.type = RTE_INTR_HANDLE_UIO;
+
+ /* 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(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 */
+ nb_maps = pci_uio_get_mappings(dirname, uio_res->maps,
+ RTE_DIM(uio_res->maps));
+ if (nb_maps < 0) {
+ rte_free(uio_res);
+ 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++) {
+ int fd;
+
+ /* 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;
+
+ /*
+ * open devname, to mmap it
+ */
+ fd = open(uio_res->path, O_RDWR);
+ if (fd < 0) {
+ RTE_LOG(ERR, EAL, "Cannot open %s: %s\n",
+ uio_res->path, strerror(errno));
+ rte_free(uio_res);
+ return -1;
+ }
+
+ if (maps[j].addr != NULL
+ || (mapaddr = pci_map_resource(NULL, fd,
+ (off_t) offset,
(size_t) maps[j].size)) == NULL) {
+ rte_free(uio_res);
+ close(fd);
+ return (-1);
+ }
+ close(fd);
+
+ maps[j].addr = mapaddr;
+ maps[j].offset = offset;
+ dev->mem_resource[i].addr = mapaddr;
+ }
+ }
+
+ TAILQ_INSERT_TAIL(pci_res_list, uio_res, next);
+
+ return (0);
+}
+
+/*
+ * 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;
+}
diff --git a/lib/librte_eal/linuxapp/eal/include/eal_pci_init.h
b/lib/librte_eal/linuxapp/eal/include/eal_pci_init.h
new file mode 100644
index 0000000..1292eda
--- /dev/null
+++ b/lib/librte_eal/linuxapp/eal/include/eal_pci_init.h
@@ -0,0 +1,66 @@
+/*-
+ * 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.
+ */
+
+#ifndef EAL_PCI_INIT_H_
+#define EAL_PCI_INIT_H_
+
+struct pci_map {
+ void *addr;
+ uint64_t offset;
+ uint64_t size;
+ uint64_t phaddr;
+};
+
+/*
+ * For multi-process we need to reproduce all PCI mappings in secondary
+ * processes, so save them in a tailq.
+ */
+struct mapped_pci_resource {
+ TAILQ_ENTRY(mapped_pci_resource) next;
+
+ struct rte_pci_addr pci_addr;
+ char path[PATH_MAX];
+ int nb_maps;
+ struct pci_map maps[PCI_MAX_RESOURCE];
+};
+
+TAILQ_HEAD(mapped_pci_res_list, mapped_pci_resource);
+extern struct mapped_pci_res_list *pci_res_list;
+
+void * pci_map_resource(void * requested_addr, int fd, off_t offset,
+ size_t size);
+
+/* map IGB_UIO resource prototype */
+int pci_uio_map_resource(struct rte_pci_device *dev);
+
+#endif /* EAL_PCI_INIT_H_ */
--
1.8.1.4
