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