1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright 2018 Gaëtan Rivet 3 */ 4 5 #include <sys/queue.h> 6 7 #include <rte_bus.h> 8 #include <rte_bus_pci.h> 9 #include <rte_dev.h> 10 #include <rte_errno.h> 11 #include <rte_kvargs.h> 12 #include <rte_devargs.h> 13 #include <rte_pci.h> 14 #include <rte_debug.h> 15 16 #include "private.h" 17 18 enum pci_params { 19 RTE_PCI_PARAM_ADDR, 20 RTE_PCI_PARAM_MAX, 21 }; 22 23 static const char * const pci_params_keys[] = { 24 [RTE_PCI_PARAM_ADDR] = "addr", 25 [RTE_PCI_PARAM_MAX] = NULL, 26 }; 27 28 static int 29 pci_addr_kv_cmp(const char *key __rte_unused, 30 const char *value, 31 void *_addr2) 32 { 33 struct rte_pci_addr _addr1; 34 struct rte_pci_addr *addr1 = &_addr1; 35 struct rte_pci_addr *addr2 = _addr2; 36 37 if (rte_pci_addr_parse(value, addr1)) 38 return -1; 39 return -abs(rte_pci_addr_cmp(addr1, addr2)); 40 } 41 42 static int 43 pci_dev_match(const struct rte_device *dev, 44 const void *_kvlist) 45 { 46 const struct rte_kvargs *kvlist = _kvlist; 47 const struct rte_pci_device *pdev; 48 49 if (kvlist == NULL) 50 /* Empty string matches everything. */ 51 return 0; 52 pdev = RTE_DEV_TO_PCI_CONST(dev); 53 /* if any field does not match. */ 54 if (rte_kvargs_process(kvlist, pci_params_keys[RTE_PCI_PARAM_ADDR], 55 &pci_addr_kv_cmp, 56 (void *)(intptr_t)&pdev->addr)) 57 return 1; 58 return 0; 59 } 60 61 void * 62 rte_pci_dev_iterate(const void *start, 63 const char *str, 64 const struct rte_dev_iterator *it __rte_unused) 65 { 66 rte_bus_find_device_t find_device; 67 struct rte_kvargs *kvargs = NULL; 68 struct rte_device *dev; 69 70 if (str != NULL) { 71 kvargs = rte_kvargs_parse(str, pci_params_keys); 72 if (kvargs == NULL) { 73 RTE_LOG(ERR, EAL, "cannot parse argument list\n"); 74 rte_errno = EINVAL; 75 return NULL; 76 } 77 } 78 find_device = rte_pci_bus.bus.find_device; 79 dev = find_device(start, pci_dev_match, kvargs); 80 rte_kvargs_free(kvargs); 81 return dev; 82 } 83 84 int 85 rte_pci_devargs_parse(struct rte_devargs *da) 86 { 87 struct rte_kvargs *kvargs; 88 const char *addr_str; 89 struct rte_pci_addr addr; 90 int ret = 0; 91 92 if (da == NULL || da->bus_str == NULL) 93 return 0; 94 95 kvargs = rte_kvargs_parse(da->bus_str, NULL); 96 if (kvargs == NULL) { 97 RTE_LOG(ERR, EAL, "cannot parse argument list: %s\n", 98 da->bus_str); 99 ret = -ENODEV; 100 goto out; 101 } 102 103 addr_str = rte_kvargs_get(kvargs, pci_params_keys[RTE_PCI_PARAM_ADDR]); 104 if (addr_str == NULL) { 105 RTE_LOG(DEBUG, EAL, "No PCI address specified using '%s=<id>' in: %s\n", 106 pci_params_keys[RTE_PCI_PARAM_ADDR], da->bus_str); 107 goto out; 108 } 109 110 ret = rte_pci_addr_parse(addr_str, &addr); 111 if (ret != 0) { 112 RTE_LOG(ERR, EAL, "PCI address invalid: %s\n", da->bus_str); 113 ret = -EINVAL; 114 goto out; 115 } 116 117 rte_pci_device_name(&addr, da->name, sizeof(da->name)); 118 119 out: 120 if (kvargs != NULL) 121 rte_kvargs_free(kvargs); 122 if (ret != 0) 123 rte_errno = -ret; 124 return ret; 125 } 126