/*-
* 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 <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"
* enabling bus master.
*/
-
-#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 */
+struct uio_map {
+ void *addr;
+ uint64_t offset;
+ uint64_t size;
+ uint64_t phaddr;
+};
/*
* For multi-process we need to reproduce all PCI mappings in secondary
TAILQ_ENTRY(uio_resource) next;
struct rte_pci_addr pci_addr;
- void *addr;
char path[PATH_MAX];
- unsigned long size;
- unsigned long offset;
+ 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 */
+/* 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;
+ return -1;
}
-
/* map a particular resource from a file */
static void *
-pci_map_resource(struct rte_pci_device *dev, void *requested_addr, const char *devname,
- unsigned long offset, unsigned long size)
+pci_map_resource(void *requested_addr, const char *devname, off_t offset,
+ size_t size)
{
- unsigned n;
int fd;
void *mapaddr;
/*
- * open devname, and mmap it: it can take some time to
- * appear, so we wait some time before returning an error
+ * open devname, to mmap it
*/
- for (n=0; n<UIO_DEV_WAIT_TIMEOUT*10; n++) {
- fd = open(devname, O_RDWR);
- if (fd >= 0)
- break;
- if (errno != ENOENT)
- break;
- usleep(100000);
- }
+ fd = open(devname, O_RDWR);
if (fd < 0) {
- RTE_LOG(ERR, EAL, "Cannot open %s: %s\n", devname, strerror(errno));
+ RTE_LOG(ERR, EAL, "Cannot open %s: %s\n",
+ devname, strerror(errno));
goto fail;
}
/* Map the PCI memory resource of device */
mapaddr = mmap(requested_addr, size, PROT_READ | PROT_WRITE,
MAP_SHARED, fd, offset);
+ close(fd);
if (mapaddr == MAP_FAILED ||
(requested_addr != NULL && mapaddr != requested_addr)) {
- RTE_LOG(ERR, EAL, "%s(): cannot mmap %s: %s\n", __func__,
- devname, strerror(errno));
- close(fd);
+ RTE_LOG(ERR, EAL, "%s(): cannot mmap(%s(%d), %p, 0x%lx, 0x%lx):"
+ " %s (%p)\n", __func__, devname, fd, requested_addr,
+ (unsigned long)size, (unsigned long)offset,
+ strerror(errno), mapaddr);
goto fail;
}
- if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
- /* save fd if in primary process */
- dev->intr_handle.fd = fd;
- dev->intr_handle.type = RTE_INTR_HANDLE_UIO;
- } else {
- /* fd is not needed in slave process, close it */
- dev->intr_handle.fd = -1;
- dev->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
- close(fd);
- }
- 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;
}
-/* map the PCI resource of a PCI device in virtual memory */
-static int
-pci_uio_map_resource(struct rte_pci_device *dev)
+
+#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)
{
- struct dirent *e;
- DIR *dir;
+ size_t i;
char dirname[PATH_MAX];
- char dirname2[PATH_MAX];
char filename[PATH_MAX];
- char devname[PATH_MAX]; /* contains the /dev/uioX */
- void *mapaddr;
- unsigned uio_num;
- unsigned long size, offset;
- struct rte_pci_addr *loc = &dev->addr;
- struct uio_resource *uio_res;
+ uint64_t offset, size;
- RTE_LOG(DEBUG, EAL, "map PCI resource for device "PCI_PRI_FMT"\n",
- loc->domain, loc->bus, loc->devid, loc->function);
+ for (i = 0; i != nb_maps; i++) {
- /* secondary processes - use already recorded details */
- if (rte_eal_process_type() != RTE_PROC_PRIMARY) {
-
- 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;
-
- if (pci_map_resource(dev, uio_res->addr, uio_res->path, \
- uio_res->offset, uio_res->size) == uio_res->addr)
- return 0;
- else {
- RTE_LOG(ERR, EAL, "Cannot mmap device resource\n");
- return -1;
- }
+ /* 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(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);
}
- RTE_LOG(ERR, EAL, "Cannot find resource for device\n");
- return -1;
+ }
+ 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),
- "/sys/bus/pci/devices/" PCI_PRI_FMT "/uio",
+ 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),
- "/sys/bus/pci/devices/" PCI_PRI_FMT,
+ SYSFS_PCI_DEVICES "/" PCI_PRI_FMT,
loc->domain, loc->bus, loc->devid, loc->function);
dir = opendir(dirname);
/* 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 */
+ /* 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)
/* 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);
+ 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) {
- rte_snprintf(dirname2, sizeof(dirname2),
- "%s/uio:uio%u", dirname, uio_num);
+ if (errno == 0 && endptr != (e->d_name + longprefix_len)) {
+ rte_snprintf(dstbuf, buflen, "%s/uio:uio%u", dirname, uio_num);
break;
}
}
/* No uio resource found */
if (e == NULL)
- return 0;
-
- /* get mapping offset */
- rte_snprintf(filename, sizeof(filename),
- "%s/maps/map0/offset", dirname2);
- if (eal_parse_sysfs_value(filename, &offset) < 0) {
- RTE_LOG(ERR, EAL, "%s(): cannot parse offset\n",
- __func__);
return -1;
- }
- /* get mapping size */
- rte_snprintf(filename, sizeof(filename),
- "%s/maps/map0/size", dirname2);
- if (eal_parse_sysfs_value(filename, &size) < 0) {
- RTE_LOG(ERR, EAL, "%s(): cannot parse size\n",
- __func__);
+ /* 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;
+ ssize_t nb_maps;
+ struct rte_pci_addr *loc = &dev->addr;
+ struct uio_resource *uio_res;
+ struct uio_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;
}
-
- /* open and mmap /dev/uioX */
rte_snprintf(devname, sizeof(devname), "/dev/uio%u", uio_num);
- mapaddr = pci_map_resource(dev, NULL, devname, offset, size);
- if (mapaddr == NULL)
- return -1;
- dev->mem_resource.addr = mapaddr;
- /* save the mapping details for secondary processes*/
- uio_res = rte_malloc("UIO_RES", sizeof(*uio_res), 0);
- if (uio_res == NULL) {
- RTE_LOG(ERR, EAL, "%s(): cannot store uio mmap details\n", __func__);
+ /* 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;
}
- uio_res->addr = mapaddr;
- uio_res->offset = offset;
- uio_res->size = size;
+ 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++) {
+
+ /* 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(NULL, devname,
+ (off_t)offset,
+ (size_t)maps[j].size)
+ ) == NULL) {
+ rte_free(uio_res);
+ 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 (0);
}
/* parse the "resource" sysfs file */
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;
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;
}
if (flags & IORESOURCE_MEM) {
- dev->mem_resource.phys_addr = phys_addr;
- dev->mem_resource.len = end_addr - phys_addr + 1;
- dev->mem_resource.addr = NULL; /* not mapped for now */
- break;
+ 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;
}
}
fclose(f);
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;
}
}
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) {
}
/* 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 {
return 0;
}
}
- TAILQ_INSERT_TAIL(&device_list, dev, next);
+ TAILQ_INSERT_TAIL(&pci_device_list, dev, next);
}
-
+
return 0;
}
return -1;
}
-/* unbind kernel driver for this device */
-static int
-pci_unbind_kernel_driver(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;
-
- 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;
- }
- 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;
- }
- }
-
- 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.
rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr, struct rte_pci_device *dev)
{
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++) {
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)
+ if (dev->devargs != NULL &&
+ dev->devargs->type == RTE_DEVTYPE_BLACKLISTED_PCI) {
+ RTE_LOG(DEBUG, EAL, " Device is blacklisted, not initializing\n");
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 (dr->drv_flags & RTE_PCI_DRV_NEED_IGB_UIO) {
+ /* map resources for devices that use igb_uio */
if (pci_uio_map_resource(dev) < 0)
return -1;
+ } 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);
+ TAILQ_INIT(&pci_driver_list);
+ TAILQ_INIT(&pci_device_list);
uio_res_list = RTE_TAILQ_RESERVE_BY_IDX(RTE_TAILQ_PCI, uio_res_list);
/* for debug purposes, PCI can be disabled */
git.droids-corp.org / dpdk.git / blobdiff