1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright 2020 Mellanox Technologies Ltd
3 */
4
5 #include <stdlib.h>
6
7 #include <rte_malloc.h>
8 #include <rte_devargs.h>
9 #include <rte_errno.h>
10 #include <rte_class.h>
11 #include <rte_pci.h>
12 #include <bus_driver.h>
13 #include <bus_pci_driver.h>
14
15 #include "mlx5_common_log.h"
16 #include "mlx5_common_private.h"
17
18 static struct rte_pci_driver mlx5_common_pci_driver;
19
20 /* PCI ID table is build dynamically based on registered mlx5 drivers. */
21 static struct rte_pci_id *mlx5_pci_id_table;
22
23 static int
pci_id_table_size_get(const struct rte_pci_id * id_table)24 pci_id_table_size_get(const struct rte_pci_id *id_table)
25 {
26 int table_size = 0;
27
28 for (; id_table->vendor_id != 0; id_table++)
29 table_size++;
30 return table_size;
31 }
32
33 static bool
pci_id_exists(const struct rte_pci_id * id,const struct rte_pci_id * table,int next_idx)34 pci_id_exists(const struct rte_pci_id *id, const struct rte_pci_id *table,
35 int next_idx)
36 {
37 int current_size = next_idx - 1;
38 int i;
39
40 for (i = 0; i < current_size; i++) {
41 if (id->device_id == table[i].device_id &&
42 id->vendor_id == table[i].vendor_id &&
43 id->subsystem_vendor_id == table[i].subsystem_vendor_id &&
44 id->subsystem_device_id == table[i].subsystem_device_id)
45 return true;
46 }
47 return false;
48 }
49
50 static void
pci_id_insert(struct rte_pci_id * new_table,int * next_idx,const struct rte_pci_id * id_table)51 pci_id_insert(struct rte_pci_id *new_table, int *next_idx,
52 const struct rte_pci_id *id_table)
53 {
54 /* Traverse the id_table, check if entry exists in new_table;
55 * Add non duplicate entries to new table.
56 */
57 for (; id_table->vendor_id != 0; id_table++) {
58 if (!pci_id_exists(id_table, new_table, *next_idx)) {
59 /* New entry; add to the table. */
60 new_table[*next_idx] = *id_table;
61 (*next_idx)++;
62 }
63 }
64 }
65
66 static int
pci_ids_table_update(const struct rte_pci_id * driver_id_table)67 pci_ids_table_update(const struct rte_pci_id *driver_id_table)
68 {
69 const struct rte_pci_id *id_iter;
70 struct rte_pci_id *updated_table;
71 struct rte_pci_id *old_table;
72 int num_ids = 0;
73 int i = 0;
74
75 old_table = mlx5_pci_id_table;
76 if (old_table)
77 num_ids = pci_id_table_size_get(old_table);
78 num_ids += pci_id_table_size_get(driver_id_table);
79 /* Increase size by one for the termination entry of vendor_id = 0. */
80 num_ids += 1;
81 updated_table = calloc(num_ids, sizeof(*updated_table));
82 if (!updated_table)
83 return -ENOMEM;
84 if (old_table == NULL) {
85 /* Copy the first driver's ID table. */
86 for (id_iter = driver_id_table; id_iter->vendor_id != 0;
87 id_iter++, i++)
88 updated_table[i] = *id_iter;
89 } else {
90 /* First copy existing table entries. */
91 for (id_iter = old_table; id_iter->vendor_id != 0;
92 id_iter++, i++)
93 updated_table[i] = *id_iter;
94 /* New id to be added at the end of current ID table. */
95 pci_id_insert(updated_table, &i, driver_id_table);
96 }
97 /* Terminate table with empty entry. */
98 updated_table[i].vendor_id = 0;
99 mlx5_common_pci_driver.id_table = updated_table;
100 mlx5_pci_id_table = updated_table;
101 free(old_table);
102 return 0;
103 }
104
105 bool
mlx5_dev_is_pci(const struct rte_device * dev)106 mlx5_dev_is_pci(const struct rte_device *dev)
107 {
108 return strcmp(dev->bus->name, "pci") == 0;
109 }
110
111 bool
mlx5_dev_is_vf_pci(const struct rte_pci_device * pci_dev)112 mlx5_dev_is_vf_pci(const struct rte_pci_device *pci_dev)
113 {
114 switch (pci_dev->id.device_id) {
115 case PCI_DEVICE_ID_MELLANOX_CONNECTX4VF:
116 case PCI_DEVICE_ID_MELLANOX_CONNECTX4LXVF:
117 case PCI_DEVICE_ID_MELLANOX_CONNECTX5VF:
118 case PCI_DEVICE_ID_MELLANOX_CONNECTX5EXVF:
119 case PCI_DEVICE_ID_MELLANOX_BLUEFIELDVF:
120 case PCI_DEVICE_ID_MELLANOX_CONNECTX6VF:
121 case PCI_DEVICE_ID_MELLANOX_CONNECTXVF:
122 return true;
123 default:
124 break;
125 }
126 return false;
127 }
128
129 bool
mlx5_dev_pci_match(const struct mlx5_class_driver * drv,const struct rte_device * dev)130 mlx5_dev_pci_match(const struct mlx5_class_driver *drv,
131 const struct rte_device *dev)
132 {
133 const struct rte_pci_device *pci_dev;
134 const struct rte_pci_id *id_table;
135
136 if (!mlx5_dev_is_pci(dev))
137 return false;
138 pci_dev = RTE_DEV_TO_PCI_CONST(dev);
139 for (id_table = drv->id_table; id_table->vendor_id != 0;
140 id_table++) {
141 /* Check if device's ids match the class driver's ids. */
142 if (id_table->vendor_id != pci_dev->id.vendor_id &&
143 id_table->vendor_id != RTE_PCI_ANY_ID)
144 continue;
145 if (id_table->device_id != pci_dev->id.device_id &&
146 id_table->device_id != RTE_PCI_ANY_ID)
147 continue;
148 if (id_table->subsystem_vendor_id !=
149 pci_dev->id.subsystem_vendor_id &&
150 id_table->subsystem_vendor_id != RTE_PCI_ANY_ID)
151 continue;
152 if (id_table->subsystem_device_id !=
153 pci_dev->id.subsystem_device_id &&
154 id_table->subsystem_device_id != RTE_PCI_ANY_ID)
155 continue;
156 if (id_table->class_id != pci_dev->id.class_id &&
157 id_table->class_id != RTE_CLASS_ANY_ID)
158 continue;
159 return true;
160 }
161 return false;
162 }
163
164 static int
mlx5_common_pci_probe(struct rte_pci_driver * pci_drv __rte_unused,struct rte_pci_device * pci_dev)165 mlx5_common_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
166 struct rte_pci_device *pci_dev)
167 {
168 return mlx5_common_dev_probe(&pci_dev->device);
169 }
170
171 static int
mlx5_common_pci_remove(struct rte_pci_device * pci_dev)172 mlx5_common_pci_remove(struct rte_pci_device *pci_dev)
173 {
174 return mlx5_common_dev_remove(&pci_dev->device);
175 }
176
177 static int
mlx5_common_pci_dma_map(struct rte_pci_device * pci_dev,void * addr,uint64_t iova,size_t len)178 mlx5_common_pci_dma_map(struct rte_pci_device *pci_dev, void *addr,
179 uint64_t iova, size_t len)
180 {
181 return mlx5_common_dev_dma_map(&pci_dev->device, addr, iova, len);
182 }
183
184 static int
mlx5_common_pci_dma_unmap(struct rte_pci_device * pci_dev,void * addr,uint64_t iova,size_t len)185 mlx5_common_pci_dma_unmap(struct rte_pci_device *pci_dev, void *addr,
186 uint64_t iova, size_t len)
187 {
188 return mlx5_common_dev_dma_unmap(&pci_dev->device, addr, iova, len);
189 }
190
191 void
mlx5_common_driver_on_register_pci(struct mlx5_class_driver * driver)192 mlx5_common_driver_on_register_pci(struct mlx5_class_driver *driver)
193 {
194 if (driver->id_table != NULL) {
195 if (pci_ids_table_update(driver->id_table) != 0)
196 return;
197 }
198 if (driver->probe_again)
199 mlx5_common_pci_driver.drv_flags |= RTE_PCI_DRV_PROBE_AGAIN;
200 if (driver->intr_lsc)
201 mlx5_common_pci_driver.drv_flags |= RTE_PCI_DRV_INTR_LSC;
202 if (driver->intr_rmv)
203 mlx5_common_pci_driver.drv_flags |= RTE_PCI_DRV_INTR_RMV;
204 }
205
206 static struct rte_pci_driver mlx5_common_pci_driver = {
207 .driver = {
208 .name = MLX5_PCI_DRIVER_NAME,
209 },
210 .probe = mlx5_common_pci_probe,
211 .remove = mlx5_common_pci_remove,
212 .dma_map = mlx5_common_pci_dma_map,
213 .dma_unmap = mlx5_common_pci_dma_unmap,
214 };
215
mlx5_common_pci_init(void)216 void mlx5_common_pci_init(void)
217 {
218 const struct rte_pci_id empty_table[] = {
219 {
220 .vendor_id = 0
221 },
222 };
223
224 /* All mlx5 PMDs constructor runs at same priority. So any of the PMD
225 * including this one can register the PCI table first. If any other
226 * PMD(s) have registered the PCI ID table, No need to register an empty
227 * default one.
228 */
229 if (mlx5_pci_id_table == NULL && pci_ids_table_update(empty_table))
230 return;
231 rte_pci_register(&mlx5_common_pci_driver);
232 }
233
RTE_FINI(mlx5_common_pci_finish)234 RTE_FINI(mlx5_common_pci_finish)
235 {
236 if (mlx5_pci_id_table != NULL) {
237 /* Constructor doesn't register with PCI bus if it failed
238 * to build the table.
239 */
240 rte_pci_unregister(&mlx5_common_pci_driver);
241 free(mlx5_pci_id_table);
242 }
243 }
244
245 RTE_PMD_EXPORT_NAME(mlx5_common_pci, __COUNTER__);
246