+++ /dev/null
-/*-
- * BSD LICENSE
- *
- * Copyright(c) 2010-2015 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 <fcntl.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/mman.h>
-
-#include <rte_eal.h>
-#include <rte_tailq.h>
-#include <rte_log.h>
-#include <rte_malloc.h>
-
-#include "eal_private.h"
-
-static struct rte_tailq_elem rte_uio_tailq = {
- .name = "UIO_RESOURCE_LIST",
-};
-EAL_REGISTER_TAILQ(rte_uio_tailq)
-
-static int
-pci_uio_map_secondary(struct rte_pci_device *dev)
-{
- int fd, i, j;
- struct mapped_pci_resource *uio_res;
- struct mapped_pci_res_list *uio_res_list =
- RTE_TAILQ_CAST(rte_uio_tailq.head, mapped_pci_res_list);
-
- TAILQ_FOREACH(uio_res, uio_res_list, next) {
-
- /* skip this element if it doesn't match our PCI address */
- if (rte_eal_compare_pci_addr(&uio_res->pci_addr, &dev->addr))
- continue;
-
- for (i = 0; i != uio_res->nb_maps; i++) {
- /*
- * open devname, to mmap it
- */
- fd = open(uio_res->maps[i].path, O_RDWR);
- if (fd < 0) {
- RTE_LOG(ERR, EAL, "Cannot open %s: %s\n",
- uio_res->maps[i].path, strerror(errno));
- return -1;
- }
-
- void *mapaddr = pci_map_resource(uio_res->maps[i].addr,
- fd, (off_t)uio_res->maps[i].offset,
- (size_t)uio_res->maps[i].size, 0);
- /* fd is not needed in slave process, close it */
- close(fd);
- if (mapaddr != uio_res->maps[i].addr) {
- RTE_LOG(ERR, EAL,
- "Cannot mmap device resource file %s to address: %p\n",
- uio_res->maps[i].path,
- uio_res->maps[i].addr);
- if (mapaddr != MAP_FAILED) {
- /* unmap addrs correctly mapped */
- for (j = 0; j < i; j++)
- pci_unmap_resource(
- uio_res->maps[j].addr,
- (size_t)uio_res->maps[j].size);
- /* unmap addr wrongly mapped */
- pci_unmap_resource(mapaddr,
- (size_t)uio_res->maps[i].size);
- }
- return -1;
- }
- }
- return 0;
- }
-
- RTE_LOG(ERR, EAL, "Cannot find resource for device\n");
- return 1;
-}
-
-/* map the PCI resource of a PCI device in virtual memory */
-int
-pci_uio_map_resource(struct rte_pci_device *dev)
-{
- int i, map_idx = 0, ret;
- uint64_t phaddr;
- struct mapped_pci_resource *uio_res = NULL;
- struct mapped_pci_res_list *uio_res_list =
- RTE_TAILQ_CAST(rte_uio_tailq.head, mapped_pci_res_list);
-
- dev->intr_handle.fd = -1;
- dev->intr_handle.uio_cfg_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);
-
- /* allocate uio resource */
- ret = pci_uio_alloc_resource(dev, &uio_res);
- if (ret)
- return ret;
-
- /* Map all BARs */
- for (i = 0; i != PCI_MAX_RESOURCE; i++) {
- /* skip empty BAR */
- phaddr = dev->mem_resource[i].phys_addr;
- if (phaddr == 0)
- continue;
-
- ret = pci_uio_map_resource_by_index(dev, i,
- uio_res, map_idx);
- if (ret)
- goto error;
-
- map_idx++;
- }
-
- uio_res->nb_maps = map_idx;
-
- TAILQ_INSERT_TAIL(uio_res_list, uio_res, next);
-
- return 0;
-error:
- for (i = 0; i < map_idx; i++) {
- pci_unmap_resource(uio_res->maps[i].addr,
- (size_t)uio_res->maps[i].size);
- rte_free(uio_res->maps[i].path);
- }
- pci_uio_free_resource(dev, uio_res);
- return -1;
-}
-
-static void
-pci_uio_unmap(struct mapped_pci_resource *uio_res)
-{
- int i;
-
- if (uio_res == NULL)
- return;
-
- for (i = 0; i != uio_res->nb_maps; i++) {
- pci_unmap_resource(uio_res->maps[i].addr,
- (size_t)uio_res->maps[i].size);
- if (rte_eal_process_type() == RTE_PROC_PRIMARY)
- rte_free(uio_res->maps[i].path);
- }
-}
-
-static struct mapped_pci_resource *
-pci_uio_find_resource(struct rte_pci_device *dev)
-{
- struct mapped_pci_resource *uio_res;
- struct mapped_pci_res_list *uio_res_list =
- RTE_TAILQ_CAST(rte_uio_tailq.head, mapped_pci_res_list);
-
- if (dev == NULL)
- return NULL;
-
- TAILQ_FOREACH(uio_res, uio_res_list, next) {
-
- /* skip this element if it doesn't match our PCI address */
- if (!rte_eal_compare_pci_addr(&uio_res->pci_addr, &dev->addr))
- return uio_res;
- }
- return NULL;
-}
-
-/* unmap the PCI resource of a PCI device in virtual memory */
-void
-pci_uio_unmap_resource(struct rte_pci_device *dev)
-{
- struct mapped_pci_resource *uio_res;
- struct mapped_pci_res_list *uio_res_list =
- RTE_TAILQ_CAST(rte_uio_tailq.head, mapped_pci_res_list);
-
- if (dev == NULL)
- return;
-
- /* find an entry for the device */
- uio_res = pci_uio_find_resource(dev);
- if (uio_res == NULL)
- return;
-
- /* secondary processes - just free maps */
- if (rte_eal_process_type() != RTE_PROC_PRIMARY)
- return pci_uio_unmap(uio_res);
-
- TAILQ_REMOVE(uio_res_list, uio_res, next);
-
- /* unmap all resources */
- pci_uio_unmap(uio_res);
-
- /* free uio resource */
- rte_free(uio_res);
-
- /* close fd if in primary process */
- close(dev->intr_handle.fd);
- if (dev->intr_handle.uio_cfg_fd >= 0) {
- close(dev->intr_handle.uio_cfg_fd);
- dev->intr_handle.uio_cfg_fd = -1;
- }
-
- dev->intr_handle.fd = -1;
- dev->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
-}
Code Review / deb_dpdk.git / blobdiff