1 /* SPDX-License-Identifier: Apache-2.0
2 * Copyright (c) 2023 Cisco Systems, Inc.
6 #include <vnet/dev/dev.h>
7 #include <vnet/dev/pci.h>
8 #include <vnet/dev/log.h>
9 #include <vlib/unix/unix.h>
11 VLIB_REGISTER_LOG_CLASS (dev_log, static) = {
13 .subclass_name = "pci",
17 vnet_dev_bus_pci_device_id_to_pci_addr (vlib_pci_addr_t *addr, char *str)
19 unformat_input_t input;
21 unformat_init_string (&input, str, strlen (str));
22 rv = unformat (&input, "pci" VNET_DEV_DEVICE_ID_PREFIX_DELIMITER "%U",
23 unformat_vlib_pci_addr, addr);
24 unformat_free (&input);
29 vnet_dev_bus_pci_get_device_info (vlib_main_t *vm, char *device_id)
31 vnet_dev_bus_pci_device_info_t *info;
32 vlib_pci_addr_t addr = {};
33 clib_error_t *err = 0;
34 vlib_pci_device_info_t *di = 0;
36 vlib_log_debug (dev_log.class, "device %s", device_id);
38 if (vnet_dev_bus_pci_device_id_to_pci_addr (&addr, device_id) == 0)
41 di = vlib_pci_get_device_info (vm, &addr, &err);
44 vlib_log_err (dev_log.class, "get_device_info: %U", format_clib_error,
46 clib_error_free (err);
50 info = clib_mem_alloc (sizeof (vnet_dev_bus_pci_device_info_t));
52 info->vendor_id = di->vendor_id;
53 info->device_id = di->device_id;
54 info->revision = di->revision;
56 vlib_pci_free_device_info (di);
61 vnet_dev_bus_pci_free_device_info (vlib_main_t *vm, void *dev_info)
63 clib_mem_free (dev_info);
67 vnet_dev_bus_pci_open (vlib_main_t *vm, vnet_dev_t *dev)
69 clib_error_t *err = 0;
70 vnet_dev_bus_pci_device_data_t *pdd = vnet_dev_get_bus_pci_device_data (dev);
72 if (vnet_dev_bus_pci_device_id_to_pci_addr (&pdd->addr, dev->device_id) == 0)
73 return VNET_DEV_ERR_INVALID_DEVICE_ID;
75 if ((err = vlib_pci_device_open (vm, &pdd->addr, 0, &pdd->handle)))
77 log_err (dev, "device_open: %U", format_clib_error, err);
78 clib_error_free (err);
79 return VNET_DEV_ERR_BUS;
82 dev->numa_node = vlib_pci_get_numa_node (vm, pdd->handle);
84 if (vlib_pci_supports_virtual_addr_dma (vm, pdd->handle))
87 log_debug (dev, "device supports VA DMA");
90 vlib_pci_set_private_data (vm, pdd->handle, (uword) dev);
92 pdd->n_msix_int = vlib_pci_get_num_msix_interrupts (vm, pdd->handle);
95 u32 sz = sizeof (pdd->msix_handlers[0]) * pdd->n_msix_int;
96 sz = round_pow2 (sz, CLIB_CACHE_LINE_BYTES);
97 pdd->msix_handlers = clib_mem_alloc_aligned (sz, CLIB_CACHE_LINE_BYTES);
98 clib_memset (pdd->msix_handlers, 0, sz);
105 vnet_dev_bus_pci_close (vlib_main_t *vm, vnet_dev_t *dev)
107 vnet_dev_bus_pci_device_data_t *pdd = vnet_dev_get_bus_pci_device_data (dev);
109 if (pdd->intx_handler)
110 vnet_dev_pci_intx_remove_handler (vm, dev);
112 if (pdd->msix_handlers)
114 for (u16 i = 0; i < pdd->n_msix_int; i++)
115 if (pdd->msix_handlers[i])
116 vnet_dev_pci_msix_remove_handler (vm, dev, i, 1);
117 clib_mem_free (pdd->msix_handlers);
118 pdd->msix_handlers = 0;
121 if (pdd->pci_handle_valid)
122 vlib_pci_device_close (vm, pdd->handle);
126 vnet_dev_bus_pci_dma_mem_alloc (vlib_main_t *vm, vnet_dev_t *dev, u32 size,
127 u32 align, void **pp)
132 align = align ? align : CLIB_CACHE_LINE_BYTES;
133 size = round_pow2 (size, align);
135 p = vlib_physmem_alloc_aligned_on_numa (vm, size, align, dev->numa_node);
139 err = vlib_physmem_last_error (vm);
140 log_err (dev, "dev_dma_mem_alloc: physmem_alloc_aligned error %U",
141 format_clib_error, err);
142 clib_error_free (err);
143 return VNET_DEV_ERR_DMA_MEM_ALLOC_FAIL;
146 if ((err = vlib_pci_map_dma (vm, vnet_dev_get_pci_handle (dev), p)))
148 log_err (dev, "dev_dma_mem_alloc: pci_map_dma: %U", format_clib_error,
150 clib_error_free (err);
151 return VNET_DEV_ERR_DMA_MEM_ALLOC_FAIL;
154 clib_memset (p, 0, size);
160 vnet_dev_bus_pci_dma_mem_free (vlib_main_t *vm, vnet_dev_t *dev, void *p)
163 vlib_physmem_free (vm, p);
167 vnet_dev_pci_read_config_header (vlib_main_t *vm, vnet_dev_t *dev,
168 vlib_pci_config_hdr_t *hdr)
170 vlib_pci_dev_handle_t h = vnet_dev_get_pci_handle (dev);
173 err = vlib_pci_read_write_config (vm, h, VLIB_READ, 0, hdr, sizeof (*hdr));
176 log_err (dev, "pci_read_config_header: %U", format_clib_error, err);
177 clib_error_free (err);
178 return VNET_DEV_ERR_BUS;
184 vnet_dev_pci_map_region (vlib_main_t *vm, vnet_dev_t *dev, u8 region,
187 vlib_pci_dev_handle_t h = vnet_dev_get_pci_handle (dev);
190 if ((err = vlib_pci_map_region (vm, h, region, pp)))
192 log_err (dev, "pci_map_region: %U", format_clib_error, err);
193 clib_error_free (err);
194 return VNET_DEV_ERR_BUS;
201 vnet_dev_pci_function_level_reset (vlib_main_t *vm, vnet_dev_t *dev)
203 vlib_pci_dev_handle_t h = vnet_dev_get_pci_handle (dev);
206 if ((err = vlib_pci_function_level_reset (vm, h)))
208 log_err (dev, "pci_function_level_reset: %U", format_clib_error, err);
209 clib_error_free (err);
210 return VNET_DEV_ERR_BUS;
217 vnet_dev_pci_bus_master_enable (vlib_main_t *vm, vnet_dev_t *dev)
219 vlib_pci_dev_handle_t h = vnet_dev_get_pci_handle (dev);
222 if ((err = vlib_pci_bus_master_enable (vm, h)))
224 log_err (dev, "pci_bus_master_enable: %U", format_clib_error, err);
225 clib_error_free (err);
226 return VNET_DEV_ERR_BUS;
232 vnet_dev_pci_intx_handler (vlib_main_t *vm, vlib_pci_dev_handle_t h)
234 vnet_dev_t *dev = (vnet_dev_t *) vlib_pci_get_private_data (vm, h);
235 vnet_dev_bus_pci_device_data_t *pdd = vnet_dev_get_bus_pci_device_data (dev);
237 if (pdd->intx_handler)
238 pdd->intx_handler (vm, dev);
242 vnet_dev_pci_intx_add_handler (vlib_main_t *vm, vnet_dev_t *dev,
243 vnet_dev_pci_intx_handler_fn_t *fn)
245 vlib_pci_dev_handle_t h = vnet_dev_get_pci_handle (dev);
248 err = vlib_pci_register_intx_handler (vm, h, vnet_dev_pci_intx_handler);
252 log_err (dev, "pci_register_intx_handler: %U", format_clib_error, err);
253 clib_error_free (err);
254 return VNET_DEV_ERR_BUS;
261 vnet_dev_pci_intx_remove_handler (vlib_main_t *vm, vnet_dev_t *dev)
263 vlib_pci_dev_handle_t h = vnet_dev_get_pci_handle (dev);
264 vnet_dev_bus_pci_device_data_t *pdd = vnet_dev_get_bus_pci_device_data (dev);
267 err = vlib_pci_unregister_intx_handler (vm, h);
271 log_err (dev, "pci_unregister_intx_handler: %U", format_clib_error, err);
272 clib_error_free (err);
273 return VNET_DEV_ERR_BUS;
276 pdd->intx_handler = 0;
282 vnet_dev_pci_msix_handler (vlib_main_t *vm, vlib_pci_dev_handle_t h, u16 line)
284 vnet_dev_t *dev = (vnet_dev_t *) vlib_pci_get_private_data (vm, h);
285 vnet_dev_bus_pci_device_data_t *pdd = vnet_dev_get_bus_pci_device_data (dev);
287 if (line < vec_len (pdd->msix_handlers) && pdd->msix_handlers[line])
288 pdd->msix_handlers[line](vm, dev, line);
292 vnet_dev_pci_msix_add_handler (vlib_main_t *vm, vnet_dev_t *dev,
293 vnet_dev_pci_msix_handler_fn_t *fn, u16 first,
296 vlib_pci_dev_handle_t h = vnet_dev_get_pci_handle (dev);
297 vnet_dev_bus_pci_device_data_t *pdd = vnet_dev_get_bus_pci_device_data (dev);
300 err = vlib_pci_register_msix_handler (vm, h, first, count,
301 vnet_dev_pci_msix_handler);
305 log_err (dev, "pci_register_msix_handler: %U", format_clib_error, err);
306 clib_error_free (err);
307 return VNET_DEV_ERR_BUS;
310 for (u16 i = first; i < first + count; i++)
312 ASSERT (pdd->msix_handlers[i] == 0);
313 pdd->msix_handlers[i] = fn;
320 vnet_dev_pci_msix_set_polling_thread (vlib_main_t *vm, vnet_dev_t *dev,
321 u16 line, u16 thread_index)
323 vlib_pci_dev_handle_t h = vnet_dev_get_pci_handle (dev);
326 index = vlib_pci_get_msix_file_index (vm, h, line);
328 clib_file_set_polling_thread (&file_main, index, thread_index);
332 vnet_dev_pci_msix_remove_handler (vlib_main_t *vm, vnet_dev_t *dev, u16 first,
335 vlib_pci_dev_handle_t h = vnet_dev_get_pci_handle (dev);
336 vnet_dev_bus_pci_device_data_t *pdd = vnet_dev_get_bus_pci_device_data (dev);
339 err = vlib_pci_unregister_msix_handler (vm, h, first, count);
343 log_err (dev, "pci_unregister_msix_handler: %U", format_clib_error, err);
344 clib_error_free (err);
345 return VNET_DEV_ERR_BUS;
348 for (u16 i = first; i < first + count; i++)
350 ASSERT (pdd->msix_handlers[i] != 0);
351 pdd->msix_handlers[i] = 0;
358 vnet_dev_pci_msix_enable (vlib_main_t *vm, vnet_dev_t *dev, u16 first,
361 vlib_pci_dev_handle_t h = vnet_dev_get_pci_handle (dev);
364 err = vlib_pci_enable_msix_irq (vm, h, first, count);
368 log_err (dev, "pci_enable_msix_irq: %U", format_clib_error, err);
369 clib_error_free (err);
370 return VNET_DEV_ERR_BUS;
377 vnet_dev_pci_msix_disable (vlib_main_t *vm, vnet_dev_t *dev, u16 first,
380 vlib_pci_dev_handle_t h = vnet_dev_get_pci_handle (dev);
383 err = vlib_pci_disable_msix_irq (vm, h, first, count);
387 log_err (dev, "pci_disble_msix_irq: %U", format_clib_error, err);
388 clib_error_free (err);
389 return VNET_DEV_ERR_BUS;
396 vnet_dev_pci_bus_master_disable (vlib_main_t *vm, vnet_dev_t *dev)
398 vlib_pci_dev_handle_t h = vnet_dev_get_pci_handle (dev);
401 if ((err = vlib_pci_bus_master_disable (vm, h)))
403 log_err (dev, "pci_bus_master_disable: %U", format_clib_error, err);
404 clib_error_free (err);
405 return VNET_DEV_ERR_BUS;
411 format_dev_pci_device_info (u8 *s, va_list *args)
413 vnet_dev_format_args_t __clib_unused *a =
414 va_arg (*args, vnet_dev_format_args_t *);
415 vnet_dev_t *dev = va_arg (*args, vnet_dev_t *);
416 vnet_dev_bus_pci_device_data_t *pdd = vnet_dev_get_bus_pci_device_data (dev);
417 vlib_main_t *vm = vlib_get_main ();
418 vlib_pci_config_t cfg = {};
421 s = format (s, "PCIe address is %U", format_vlib_pci_addr, &pdd->addr);
423 err = vlib_pci_read_write_config (vm, pdd->handle, VLIB_READ, 0, &cfg,
427 s = format (s, ", port is %U, speed is %U (max %U)",
428 format_vlib_pci_link_port, &cfg, format_vlib_pci_link_speed,
429 &cfg, format_vlib_pci_link_speed_cap, &cfg);
432 clib_error_free (err);
438 format_dev_pci_device_addr (u8 *s, va_list *args)
440 vnet_dev_t *dev = va_arg (*args, vnet_dev_t *);
441 vnet_dev_bus_pci_device_data_t *pdd = vnet_dev_get_bus_pci_device_data (dev);
442 return format (s, "%U", format_vlib_pci_addr, &pdd->addr);
445 VNET_DEV_REGISTER_BUS (pci) = {
447 .device_data_size = sizeof (vnet_dev_bus_pci_device_info_t),
449 .device_open = vnet_dev_bus_pci_open,
450 .device_close = vnet_dev_bus_pci_close,
451 .get_device_info = vnet_dev_bus_pci_get_device_info,
452 .free_device_info = vnet_dev_bus_pci_free_device_info,
453 .dma_mem_alloc_fn = vnet_dev_bus_pci_dma_mem_alloc,
454 .dma_mem_free_fn = vnet_dev_bus_pci_dma_mem_free,
455 .format_device_info = format_dev_pci_device_info,
456 .format_device_addr = format_dev_pci_device_addr,