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37 #include <sys/types.h>
42 #include <rte_tailq.h>
44 #include <rte_malloc.h>
46 #include "eal_private.h"
48 static struct rte_tailq_elem rte_uio_tailq = {
49 .name = "UIO_RESOURCE_LIST",
51 EAL_REGISTER_TAILQ(rte_uio_tailq)
54 pci_uio_map_secondary(struct rte_pci_device *dev)
57 struct mapped_pci_resource *uio_res;
58 struct mapped_pci_res_list *uio_res_list =
59 RTE_TAILQ_CAST(rte_uio_tailq.head, mapped_pci_res_list);
61 TAILQ_FOREACH(uio_res, uio_res_list, next) {
63 /* skip this element if it doesn't match our PCI address */
64 if (rte_eal_compare_pci_addr(&uio_res->pci_addr, &dev->addr))
67 for (i = 0; i != uio_res->nb_maps; i++) {
69 * open devname, to mmap it
71 fd = open(uio_res->maps[i].path, O_RDWR);
73 RTE_LOG(ERR, EAL, "Cannot open %s: %s\n",
74 uio_res->maps[i].path, strerror(errno));
78 void *mapaddr = pci_map_resource(uio_res->maps[i].addr,
79 fd, (off_t)uio_res->maps[i].offset,
80 (size_t)uio_res->maps[i].size, 0);
81 /* fd is not needed in slave process, close it */
83 if (mapaddr != uio_res->maps[i].addr) {
85 "Cannot mmap device resource file %s to address: %p\n",
86 uio_res->maps[i].path,
87 uio_res->maps[i].addr);
88 if (mapaddr != MAP_FAILED) {
89 /* unmap addrs correctly mapped */
90 for (j = 0; j < i; j++)
92 uio_res->maps[j].addr,
93 (size_t)uio_res->maps[j].size);
94 /* unmap addr wrongly mapped */
95 pci_unmap_resource(mapaddr,
96 (size_t)uio_res->maps[i].size);
104 RTE_LOG(ERR, EAL, "Cannot find resource for device\n");
108 /* map the PCI resource of a PCI device in virtual memory */
110 pci_uio_map_resource(struct rte_pci_device *dev)
112 int i, map_idx = 0, ret;
114 struct mapped_pci_resource *uio_res = NULL;
115 struct mapped_pci_res_list *uio_res_list =
116 RTE_TAILQ_CAST(rte_uio_tailq.head, mapped_pci_res_list);
118 dev->intr_handle.fd = -1;
119 dev->intr_handle.uio_cfg_fd = -1;
120 dev->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
122 /* secondary processes - use already recorded details */
123 if (rte_eal_process_type() != RTE_PROC_PRIMARY)
124 return pci_uio_map_secondary(dev);
126 /* allocate uio resource */
127 ret = pci_uio_alloc_resource(dev, &uio_res);
132 for (i = 0; i != PCI_MAX_RESOURCE; i++) {
134 phaddr = dev->mem_resource[i].phys_addr;
138 ret = pci_uio_map_resource_by_index(dev, i,
146 uio_res->nb_maps = map_idx;
148 TAILQ_INSERT_TAIL(uio_res_list, uio_res, next);
152 for (i = 0; i < map_idx; i++) {
153 pci_unmap_resource(uio_res->maps[i].addr,
154 (size_t)uio_res->maps[i].size);
155 rte_free(uio_res->maps[i].path);
157 pci_uio_free_resource(dev, uio_res);
162 pci_uio_unmap(struct mapped_pci_resource *uio_res)
169 for (i = 0; i != uio_res->nb_maps; i++) {
170 pci_unmap_resource(uio_res->maps[i].addr,
171 (size_t)uio_res->maps[i].size);
172 if (rte_eal_process_type() == RTE_PROC_PRIMARY)
173 rte_free(uio_res->maps[i].path);
177 static struct mapped_pci_resource *
178 pci_uio_find_resource(struct rte_pci_device *dev)
180 struct mapped_pci_resource *uio_res;
181 struct mapped_pci_res_list *uio_res_list =
182 RTE_TAILQ_CAST(rte_uio_tailq.head, mapped_pci_res_list);
187 TAILQ_FOREACH(uio_res, uio_res_list, next) {
189 /* skip this element if it doesn't match our PCI address */
190 if (!rte_eal_compare_pci_addr(&uio_res->pci_addr, &dev->addr))
196 /* unmap the PCI resource of a PCI device in virtual memory */
198 pci_uio_unmap_resource(struct rte_pci_device *dev)
200 struct mapped_pci_resource *uio_res;
201 struct mapped_pci_res_list *uio_res_list =
202 RTE_TAILQ_CAST(rte_uio_tailq.head, mapped_pci_res_list);
207 /* find an entry for the device */
208 uio_res = pci_uio_find_resource(dev);
212 /* secondary processes - just free maps */
213 if (rte_eal_process_type() != RTE_PROC_PRIMARY)
214 return pci_uio_unmap(uio_res);
216 TAILQ_REMOVE(uio_res_list, uio_res, next);
218 /* unmap all resources */
219 pci_uio_unmap(uio_res);
221 /* free uio resource */
224 /* close fd if in primary process */
225 close(dev->intr_handle.fd);
226 if (dev->intr_handle.uio_cfg_fd >= 0) {
227 close(dev->intr_handle.uio_cfg_fd);
228 dev->intr_handle.uio_cfg_fd = -1;
231 dev->intr_handle.fd = -1;
232 dev->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;