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Diffstat (limited to 'lib/librte_eal/linuxapp/eal/eal_pci_uio.c')
-rw-r--r--lib/librte_eal/linuxapp/eal/eal_pci_uio.c567
1 files changed, 0 insertions, 567 deletions
diff --git a/lib/librte_eal/linuxapp/eal/eal_pci_uio.c b/lib/librte_eal/linuxapp/eal/eal_pci_uio.c
deleted file mode 100644
index fa10329f..00000000
--- a/lib/librte_eal/linuxapp/eal/eal_pci_uio.c
+++ /dev/null
@@ -1,567 +0,0 @@
-/*-
- * 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 <inttypes.h>
-#include <sys/stat.h>
-#include <sys/mman.h>
-#include <sys/sysmacros.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, &reg, 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, &reg, 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 (ret != 0) {
- 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),
- "%s/" PCI_PRI_FMT "/uio", pci_get_sysfs_path(),
- loc->domain, loc->bus, loc->devid, loc->function);
-
- dir = opendir(dirname);
- if (dir == NULL) {
- /* retry with the parent directory */
- snprintf(dirname, sizeof(dirname),
- "%s/" PCI_PRI_FMT, pci_get_sysfs_path(),
- 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 >= 0) {
- 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];
- 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),
- "%s/" PCI_PRI_FMT "/resource%d",
- pci_get_sysfs_path(),
- 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;
-}
-
-#if defined(RTE_ARCH_X86)
-int
-pci_uio_ioport_map(struct rte_pci_device *dev, int bar,
- struct rte_pci_ioport *p)
-{
- 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;
- p->len = 0;
- return 0;
-}
-#else
-int
-pci_uio_ioport_map(struct rte_pci_device *dev, int bar,
- struct rte_pci_ioport *p)
-{
- FILE *f;
- char buf[BUFSIZ];
- char filename[PATH_MAX];
- uint64_t phys_addr, end_addr, flags;
- int fd, i;
- void *addr;
-
- /* open and read addresses of the corresponding resource in sysfs */
- snprintf(filename, sizeof(filename), "%s/" PCI_PRI_FMT "/resource",
- pci_get_sysfs_path(), dev->addr.domain, dev->addr.bus,
- dev->addr.devid, dev->addr.function);
- f = fopen(filename, "r");
- if (f == NULL) {
- RTE_LOG(ERR, EAL, "Cannot open sysfs resource: %s\n",
- strerror(errno));
- return -1;
- }
- for (i = 0; i < bar + 1; i++) {
- if (fgets(buf, sizeof(buf), f) == NULL) {
- RTE_LOG(ERR, EAL, "Cannot read sysfs resource\n");
- goto error;
- }
- }
- if (pci_parse_one_sysfs_resource(buf, sizeof(buf), &phys_addr,
- &end_addr, &flags) < 0)
- goto error;
- if ((flags & IORESOURCE_IO) == 0) {
- RTE_LOG(ERR, EAL, "BAR %d is not an IO resource\n", bar);
- goto error;
- }
- snprintf(filename, sizeof(filename), "%s/" PCI_PRI_FMT "/resource%d",
- pci_get_sysfs_path(), dev->addr.domain, dev->addr.bus,
- dev->addr.devid, dev->addr.function, bar);
-
- /* mmap the pci resource */
- fd = open(filename, O_RDWR);
- if (fd < 0) {
- RTE_LOG(ERR, EAL, "Cannot open %s: %s\n", filename,
- strerror(errno));
- goto error;
- }
- addr = mmap(NULL, end_addr + 1, PROT_READ | PROT_WRITE,
- MAP_SHARED, fd, 0);
- close(fd);
- if (addr == MAP_FAILED) {
- RTE_LOG(ERR, EAL, "Cannot mmap IO port resource: %s\n",
- strerror(errno));
- goto error;
- }
-
- /* strangely, the base address is mmap addr + phys_addr */
- p->base = (uintptr_t)addr + phys_addr;
- p->len = end_addr + 1;
- RTE_LOG(DEBUG, EAL, "PCI Port IO found start=0x%"PRIx64"\n", p->base);
- fclose(f);
-
- return 0;
-
-error:
- fclose(f);
- return -1;
-}
-#endif
-
-void
-pci_uio_ioport_read(struct rte_pci_ioport *p,
- void *data, size_t len, off_t offset)
-{
- uint8_t *d;
- int size;
- uintptr_t reg = p->base + offset;
-
- for (d = data; len > 0; d += size, reg += size, len -= size) {
- if (len >= 4) {
- size = 4;
-#if defined(RTE_ARCH_X86)
- *(uint32_t *)d = inl(reg);
-#else
- *(uint32_t *)d = *(volatile uint32_t *)reg;
-#endif
- } else if (len >= 2) {
- size = 2;
-#if defined(RTE_ARCH_X86)
- *(uint16_t *)d = inw(reg);
-#else
- *(uint16_t *)d = *(volatile uint16_t *)reg;
-#endif
- } else {
- size = 1;
-#if defined(RTE_ARCH_X86)
- *d = inb(reg);
-#else
- *d = *(volatile uint8_t *)reg;
-#endif
- }
- }
-}
-
-void
-pci_uio_ioport_write(struct rte_pci_ioport *p,
- const void *data, size_t len, off_t offset)
-{
- const uint8_t *s;
- int size;
- uintptr_t reg = p->base + offset;
-
- for (s = data; len > 0; s += size, reg += size, len -= size) {
- if (len >= 4) {
- size = 4;
-#if defined(RTE_ARCH_X86)
- outl_p(*(const uint32_t *)s, reg);
-#else
- *(volatile uint32_t *)reg = *(const uint32_t *)s;
-#endif
- } else if (len >= 2) {
- size = 2;
-#if defined(RTE_ARCH_X86)
- outw_p(*(const uint16_t *)s, reg);
-#else
- *(volatile uint16_t *)reg = *(const uint16_t *)s;
-#endif
- } else {
- size = 1;
-#if defined(RTE_ARCH_X86)
- outb_p(*s, reg);
-#else
- *(volatile uint8_t *)reg = *s;
-#endif
- }
- }
-}
-
-int
-pci_uio_ioport_unmap(struct rte_pci_ioport *p)
-{
-#if defined(RTE_ARCH_X86)
- RTE_SET_USED(p);
- /* FIXME close intr fd ? */
- return 0;
-#else
- return munmap((void *)(uintptr_t)p->base, p->len);
-#endif
-}