--- /dev/null
+/*-
+ * 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 <unistd.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <linux/pci_regs.h>
+
+#if defined(RTE_ARCH_X86)
+#include <sys/io.h>
+#endif
+
+#include <rte_log.h>
+#include <rte_pci.h>
+#include <rte_eal_memconfig.h>
+#include <rte_common.h>
+#include <rte_malloc.h>
+
+#include "eal_filesystem.h"
+#include "eal_pci_init.h"
+
+void *pci_map_addr = NULL;
+
+#define OFF_MAX ((uint64_t)(off_t)-1)
+
+int
+pci_uio_read_config(const struct rte_intr_handle *intr_handle,
+ void *buf, size_t len, off_t offset)
+{
+ return pread(intr_handle->uio_cfg_fd, buf, len, offset);
+}
+
+int
+pci_uio_write_config(const struct rte_intr_handle *intr_handle,
+ const void *buf, size_t len, off_t offset)
+{
+ return pwrite(intr_handle->uio_cfg_fd, buf, len, offset);
+}
+
+static int
+pci_uio_set_bus_master(int dev_fd)
+{
+ uint16_t reg;
+ int ret;
+
+ ret = pread(dev_fd, ®, sizeof(reg), PCI_COMMAND);
+ if (ret != sizeof(reg)) {
+ RTE_LOG(ERR, EAL,
+ "Cannot read command from PCI config space!\n");
+ return -1;
+ }
+
+ /* return if bus mastering is already on */
+ if (reg & PCI_COMMAND_MASTER)
+ return 0;
+
+ reg |= PCI_COMMAND_MASTER;
+
+ ret = pwrite(dev_fd, ®, sizeof(reg), PCI_COMMAND);
+ if (ret != sizeof(reg)) {
+ RTE_LOG(ERR, EAL,
+ "Cannot write command to PCI config space!\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+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 */
+ 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, "%u:%u", &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" */
+ 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, int create)
+{
+ 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 */
+
+ 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 */
+ 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)) {
+ 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)) {
+ 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 && create &&
+ pci_mknod_uio_dev(dstbuf, uio_num) < 0)
+ RTE_LOG(WARNING, EAL, "Cannot create /dev/uio%u\n", uio_num);
+
+ return uio_num;
+}
+
+void
+pci_uio_free_resource(struct rte_pci_device *dev,
+ struct mapped_pci_resource *uio_res)
+{
+ rte_free(uio_res);
+
+ if (dev->intr_handle.uio_cfg_fd >= 0) {
+ close(dev->intr_handle.uio_cfg_fd);
+ dev->intr_handle.uio_cfg_fd = -1;
+ }
+ if (dev->intr_handle.fd) {
+ close(dev->intr_handle.fd);
+ dev->intr_handle.fd = -1;
+ dev->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
+ }
+}
+
+int
+pci_uio_alloc_resource(struct rte_pci_device *dev,
+ struct mapped_pci_resource **uio_res)
+{
+ char dirname[PATH_MAX];
+ char cfgname[PATH_MAX];
+ char devname[PATH_MAX]; /* contains the /dev/uioX */
+ int uio_num;
+ struct rte_pci_addr *loc;
+
+ loc = &dev->addr;
+
+ /* find uio resource */
+ uio_num = pci_get_uio_dev(dev, dirname, sizeof(dirname), 1);
+ 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;
+ }
+ 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));
+ goto error;
+ }
+
+ snprintf(cfgname, sizeof(cfgname),
+ "/sys/class/uio/uio%u/device/config", uio_num);
+ dev->intr_handle.uio_cfg_fd = open(cfgname, O_RDWR);
+ if (dev->intr_handle.uio_cfg_fd < 0) {
+ RTE_LOG(ERR, EAL, "Cannot open %s: %s\n",
+ cfgname, strerror(errno));
+ goto error;
+ }
+
+ if (dev->kdrv == RTE_KDRV_IGB_UIO)
+ dev->intr_handle.type = RTE_INTR_HANDLE_UIO;
+ else {
+ dev->intr_handle.type = RTE_INTR_HANDLE_UIO_INTX;
+
+ /* set bus master that is not done by uio_pci_generic */
+ if (pci_uio_set_bus_master(dev->intr_handle.uio_cfg_fd)) {
+ RTE_LOG(ERR, EAL, "Cannot set up bus mastering!\n");
+ goto error;
+ }
+ }
+
+ /* allocate the mapping details for secondary processes*/
+ *uio_res = rte_zmalloc("UIO_RES", sizeof(**uio_res), 0);
+ if (*uio_res == NULL) {
+ RTE_LOG(ERR, EAL,
+ "%s(): cannot store uio mmap details\n", __func__);
+ goto error;
+ }
+
+ snprintf((*uio_res)->path, sizeof((*uio_res)->path), "%s", devname);
+ memcpy(&(*uio_res)->pci_addr, &dev->addr, sizeof((*uio_res)->pci_addr));
+
+ return 0;
+
+error:
+ pci_uio_free_resource(dev, *uio_res);
+ return -1;
+}
+
+int
+pci_uio_map_resource_by_index(struct rte_pci_device *dev, int res_idx,
+ struct mapped_pci_resource *uio_res, int map_idx)
+{
+ int fd;
+ char devname[PATH_MAX]; /* contains the /dev/uioX */
+ void *mapaddr;
+ struct rte_pci_addr *loc;
+ struct pci_map *maps;
+
+ loc = &dev->addr;
+ maps = uio_res->maps;
+
+ /* update devname for mmap */
+ snprintf(devname, sizeof(devname),
+ SYSFS_PCI_DEVICES "/" PCI_PRI_FMT "/resource%d",
+ loc->domain, loc->bus, loc->devid,
+ loc->function, res_idx);
+
+ /* allocate memory to keep path */
+ maps[map_idx].path = rte_malloc(NULL, strlen(devname) + 1, 0);
+ if (maps[map_idx].path == NULL) {
+ RTE_LOG(ERR, EAL, "Cannot allocate memory for path: %s\n",
+ strerror(errno));
+ return -1;
+ }
+
+ /*
+ * open resource file, to mmap it
+ */
+ fd = open(devname, O_RDWR);
+ if (fd < 0) {
+ RTE_LOG(ERR, EAL, "Cannot open %s: %s\n",
+ devname, strerror(errno));
+ goto error;
+ }
+
+ /* try mapping somewhere close to the end of hugepages */
+ if (pci_map_addr == NULL)
+ pci_map_addr = pci_find_max_end_va();
+
+ mapaddr = pci_map_resource(pci_map_addr, fd, 0,
+ (size_t)dev->mem_resource[res_idx].len, 0);
+ close(fd);
+ if (mapaddr == MAP_FAILED)
+ goto error;
+
+ pci_map_addr = RTE_PTR_ADD(mapaddr,
+ (size_t)dev->mem_resource[res_idx].len);
+
+ maps[map_idx].phaddr = dev->mem_resource[res_idx].phys_addr;
+ maps[map_idx].size = dev->mem_resource[res_idx].len;
+ maps[map_idx].addr = mapaddr;
+ maps[map_idx].offset = 0;
+ strcpy(maps[map_idx].path, devname);
+ dev->mem_resource[res_idx].addr = mapaddr;
+
+ return 0;
+
+error:
+ rte_free(maps[map_idx].path);
+ return -1;
+}
+
+int
+pci_uio_ioport_map(struct rte_pci_device *dev, int bar,
+ struct rte_pci_ioport *p)
+{
+#if defined(RTE_ARCH_X86)
+ char dirname[PATH_MAX];
+ char filename[PATH_MAX];
+ int uio_num;
+ unsigned long start;
+
+ uio_num = pci_get_uio_dev(dev, dirname, sizeof(dirname), 0);
+ if (uio_num < 0)
+ return -1;
+
+ /* get portio start */
+ snprintf(filename, sizeof(filename),
+ "%s/portio/port%d/start", dirname, bar);
+ if (eal_parse_sysfs_value(filename, &start) < 0) {
+ RTE_LOG(ERR, EAL, "%s(): cannot parse portio start\n",
+ __func__);
+ return -1;
+ }
+ /* ensure we don't get anything funny here, read/write will cast to
+ * uin16_t */
+ if (start > UINT16_MAX)
+ return -1;
+
+ /* FIXME only for primary process ? */
+ if (dev->intr_handle.type == RTE_INTR_HANDLE_UNKNOWN) {
+
+ snprintf(filename, sizeof(filename), "/dev/uio%u", uio_num);
+ dev->intr_handle.fd = open(filename, O_RDWR);
+ if (dev->intr_handle.fd < 0) {
+ RTE_LOG(ERR, EAL, "Cannot open %s: %s\n",
+ filename, strerror(errno));
+ return -1;
+ }
+ dev->intr_handle.type = RTE_INTR_HANDLE_UIO;
+ }
+
+ RTE_LOG(DEBUG, EAL, "PCI Port IO found start=0x%lx\n", start);
+
+ p->base = start;
+ return 0;
+#else
+ RTE_SET_USED(dev);
+ RTE_SET_USED(bar);
+ RTE_SET_USED(p);
+ return -1;
+#endif
+}
+
+void
+pci_uio_ioport_read(struct rte_pci_ioport *p,
+ void *data, size_t len, off_t offset)
+{
+#if defined(RTE_ARCH_X86)
+ uint8_t *d;
+ int size;
+ unsigned short reg = p->base + offset;
+
+ for (d = data; len > 0; d += size, reg += size, len -= size) {
+ if (len >= 4) {
+ size = 4;
+ *(uint32_t *)d = inl(reg);
+ } else if (len >= 2) {
+ size = 2;
+ *(uint16_t *)d = inw(reg);
+ } else {
+ size = 1;
+ *d = inb(reg);
+ }
+ }
+#else
+ RTE_SET_USED(p);
+ RTE_SET_USED(data);
+ RTE_SET_USED(len);
+ RTE_SET_USED(offset);
+#endif
+}
+
+void
+pci_uio_ioport_write(struct rte_pci_ioport *p,
+ const void *data, size_t len, off_t offset)
+{
+#if defined(RTE_ARCH_X86)
+ const uint8_t *s;
+ int size;
+ unsigned short reg = p->base + offset;
+
+ for (s = data; len > 0; s += size, reg += size, len -= size) {
+ if (len >= 4) {
+ size = 4;
+ outl_p(*(const uint32_t *)s, reg);
+ } else if (len >= 2) {
+ size = 2;
+ outw_p(*(const uint16_t *)s, reg);
+ } else {
+ size = 1;
+ outb_p(*s, reg);
+ }
+ }
+#else
+ RTE_SET_USED(p);
+ RTE_SET_USED(data);
+ RTE_SET_USED(len);
+ RTE_SET_USED(offset);
+#endif
+}
+
+int
+pci_uio_ioport_unmap(struct rte_pci_ioport *p)
+{
+ RTE_SET_USED(p);
+#if defined(RTE_ARCH_X86)
+ /* FIXME close intr fd ? */
+ return 0;
+#else
+ return -1;
+#endif
+}
Code Review / deb_dpdk.git / blobdiff