1 /* SPDX-License-Identifier: Apache-2.0
2 * Copyright (c) 2023 Cisco Systems, Inc.
5 #include "vlib/pci/pci.h"
7 #include <vnet/dev/dev.h>
8 #include <vnet/dev/pci.h>
9 #include <vnet/dev/log.h>
11 VLIB_REGISTER_LOG_CLASS (dev_log, static) = {
13 .subclass_name = "pci",
14 .default_syslog_level = VLIB_LOG_LEVEL_DEBUG,
18 vnet_dev_bus_pci_device_id_to_pci_addr (vlib_pci_addr_t *addr, char *str)
20 unformat_input_t input;
22 unformat_init_string (&input, str, strlen (str));
23 rv = unformat (&input, "pci" VNET_DEV_DEVICE_ID_PREFIX_DELIMITER "%U",
24 unformat_vlib_pci_addr, addr);
25 unformat_free (&input);
30 vnet_dev_bus_pci_get_device_info (vlib_main_t *vm, char *device_id)
32 vnet_dev_bus_pci_device_info_t *info;
33 vlib_pci_addr_t addr = {};
34 clib_error_t *err = 0;
35 vlib_pci_device_info_t *di = 0;
37 vlib_log_debug (dev_log.class, "device %s", device_id);
39 if (vnet_dev_bus_pci_device_id_to_pci_addr (&addr, device_id) == 0)
42 di = vlib_pci_get_device_info (vm, &addr, &err);
45 vlib_log_err (dev_log.class, "get_device_info: %U", format_clib_error,
47 clib_error_free (err);
51 info = clib_mem_alloc (sizeof (vnet_dev_bus_pci_device_info_t));
53 info->vendor_id = di->vendor_id;
54 info->device_id = di->device_id;
55 info->revision = di->revision;
57 vlib_pci_free_device_info (di);
62 vnet_dev_bus_pci_free_device_info (vlib_main_t *vm, void *dev_info)
64 clib_mem_free (dev_info);
68 vnet_dev_bus_pci_open (vlib_main_t *vm, vnet_dev_t *dev)
70 clib_error_t *err = 0;
71 vnet_dev_bus_pci_device_data_t *pdd = vnet_dev_get_bus_pci_device_data (dev);
73 if (vnet_dev_bus_pci_device_id_to_pci_addr (&pdd->addr, dev->device_id) == 0)
74 return VNET_DEV_ERR_INVALID_DEVICE_ID;
76 if ((err = vlib_pci_device_open (vm, &pdd->addr, 0, &pdd->handle)))
78 log_err (dev, "device_open: %U", format_clib_error, err);
79 clib_error_free (err);
80 return VNET_DEV_ERR_BUS;
83 dev->numa_node = vlib_pci_get_numa_node (vm, pdd->handle);
85 if (vlib_pci_supports_virtual_addr_dma (vm, pdd->handle))
88 log_debug (dev, "device supports VA DMA");
91 vlib_pci_set_private_data (vm, pdd->handle, (uword) dev);
93 pdd->n_msix_int = vlib_pci_get_num_msix_interrupts (vm, pdd->handle);
96 u32 sz = sizeof (pdd->msix_handlers[0]) * pdd->n_msix_int;
97 sz = round_pow2 (sz, CLIB_CACHE_LINE_BYTES);
98 pdd->msix_handlers = clib_mem_alloc_aligned (sz, CLIB_CACHE_LINE_BYTES);
99 clib_memset (pdd->msix_handlers, 0, sz);
106 vnet_dev_bus_pci_close (vlib_main_t *vm, vnet_dev_t *dev)
108 vnet_dev_bus_pci_device_data_t *pdd = vnet_dev_get_bus_pci_device_data (dev);
110 if (pdd->intx_handler)
111 vnet_dev_pci_intx_remove_handler (vm, dev);
113 if (pdd->msix_handlers)
115 for (u16 i = 0; i < pdd->n_msix_int; i++)
116 if (pdd->msix_handlers[i])
117 vnet_dev_pci_msix_remove_handler (vm, dev, i, 1);
118 clib_mem_free (pdd->msix_handlers);
119 pdd->msix_handlers = 0;
122 if (pdd->pci_handle_valid)
123 vlib_pci_device_close (vm, pdd->handle);
127 vnet_dev_bus_pci_dma_mem_alloc (vlib_main_t *vm, vnet_dev_t *dev, u32 size,
128 u32 align, void **pp)
133 align = align ? align : CLIB_CACHE_LINE_BYTES;
134 size = round_pow2 (size, align);
136 p = vlib_physmem_alloc_aligned_on_numa (vm, size, align, dev->numa_node);
140 err = vlib_physmem_last_error (vm);
141 log_err (dev, "dev_dma_mem_alloc: physmem_alloc_aligned error %U",
142 format_clib_error, err);
143 clib_error_free (err);
144 return VNET_DEV_ERR_DMA_MEM_ALLOC_FAIL;
147 if ((err = vlib_pci_map_dma (vm, vnet_dev_get_pci_handle (dev), p)))
149 log_err (dev, "dev_dma_mem_alloc: pci_map_dma: %U", format_clib_error,
151 clib_error_free (err);
152 return VNET_DEV_ERR_DMA_MEM_ALLOC_FAIL;
155 clib_memset (p, 0, size);
161 vnet_dev_bus_pci_dma_mem_free (vlib_main_t *vm, vnet_dev_t *dev, void *p)
164 vlib_physmem_free (vm, p);
168 vnet_dev_pci_read_config_header (vlib_main_t *vm, vnet_dev_t *dev,
169 vlib_pci_config_hdr_t *hdr)
171 vlib_pci_dev_handle_t h = vnet_dev_get_pci_handle (dev);
174 err = vlib_pci_read_write_config (vm, h, VLIB_READ, 0, hdr, sizeof (*hdr));
177 log_err (dev, "pci_read_config_header: %U", format_clib_error, err);
178 clib_error_free (err);
179 return VNET_DEV_ERR_BUS;
185 vnet_dev_pci_map_region (vlib_main_t *vm, vnet_dev_t *dev, u8 region,
188 vlib_pci_dev_handle_t h = vnet_dev_get_pci_handle (dev);
191 if ((err = vlib_pci_map_region (vm, h, region, pp)))
193 log_err (dev, "pci_map_region: %U", format_clib_error, err);
194 clib_error_free (err);
195 return VNET_DEV_ERR_BUS;
202 vnet_dev_pci_function_level_reset (vlib_main_t *vm, vnet_dev_t *dev)
204 vlib_pci_dev_handle_t h = vnet_dev_get_pci_handle (dev);
207 if ((err = vlib_pci_function_level_reset (vm, h)))
209 log_err (dev, "pci_function_level_reset: %U", format_clib_error, err);
210 clib_error_free (err);
211 return VNET_DEV_ERR_BUS;
218 vnet_dev_pci_bus_master_enable (vlib_main_t *vm, vnet_dev_t *dev)
220 vlib_pci_dev_handle_t h = vnet_dev_get_pci_handle (dev);
223 if ((err = vlib_pci_bus_master_enable (vm, h)))
225 log_err (dev, "pci_bus_master_enable: %U", format_clib_error, err);
226 clib_error_free (err);
227 return VNET_DEV_ERR_BUS;
233 vnet_dev_pci_intx_handler (vlib_main_t *vm, vlib_pci_dev_handle_t h)
235 vnet_dev_t *dev = (vnet_dev_t *) vlib_pci_get_private_data (vm, h);
236 vnet_dev_bus_pci_device_data_t *pdd = vnet_dev_get_bus_pci_device_data (dev);
238 if (pdd->intx_handler)
239 pdd->intx_handler (vm, dev);
243 vnet_dev_pci_intx_add_handler (vlib_main_t *vm, vnet_dev_t *dev,
244 vnet_dev_pci_intx_handler_fn_t *fn)
246 vlib_pci_dev_handle_t h = vnet_dev_get_pci_handle (dev);
249 err = vlib_pci_register_intx_handler (vm, h, vnet_dev_pci_intx_handler);
253 log_err (dev, "pci_register_intx_handler: %U", format_clib_error, err);
254 clib_error_free (err);
255 return VNET_DEV_ERR_BUS;
262 vnet_dev_pci_intx_remove_handler (vlib_main_t *vm, vnet_dev_t *dev)
264 vlib_pci_dev_handle_t h = vnet_dev_get_pci_handle (dev);
265 vnet_dev_bus_pci_device_data_t *pdd = vnet_dev_get_bus_pci_device_data (dev);
268 err = vlib_pci_unregister_intx_handler (vm, h);
272 log_err (dev, "pci_unregister_intx_handler: %U", format_clib_error, err);
273 clib_error_free (err);
274 return VNET_DEV_ERR_BUS;
277 pdd->intx_handler = 0;
283 vnet_dev_pci_msix_handler (vlib_main_t *vm, vlib_pci_dev_handle_t h, u16 line)
285 vnet_dev_t *dev = (vnet_dev_t *) vlib_pci_get_private_data (vm, h);
286 vnet_dev_bus_pci_device_data_t *pdd = vnet_dev_get_bus_pci_device_data (dev);
288 if (line < vec_len (pdd->msix_handlers) && pdd->msix_handlers[line])
289 pdd->msix_handlers[line](vm, dev, line);
293 vnet_dev_pci_msix_add_handler (vlib_main_t *vm, vnet_dev_t *dev,
294 vnet_dev_pci_msix_handler_fn_t *fn, u16 first,
297 vlib_pci_dev_handle_t h = vnet_dev_get_pci_handle (dev);
298 vnet_dev_bus_pci_device_data_t *pdd = vnet_dev_get_bus_pci_device_data (dev);
301 err = vlib_pci_register_msix_handler (vm, h, first, count,
302 vnet_dev_pci_msix_handler);
306 log_err (dev, "pci_register_msix_handler: %U", format_clib_error, err);
307 clib_error_free (err);
308 return VNET_DEV_ERR_BUS;
311 for (u16 i = first; i < first + count; i++)
313 ASSERT (pdd->msix_handlers[i] == 0);
314 pdd->msix_handlers[i] = fn;
321 vnet_dev_pci_msix_remove_handler (vlib_main_t *vm, vnet_dev_t *dev, u16 first,
324 vlib_pci_dev_handle_t h = vnet_dev_get_pci_handle (dev);
325 vnet_dev_bus_pci_device_data_t *pdd = vnet_dev_get_bus_pci_device_data (dev);
328 err = vlib_pci_unregister_msix_handler (vm, h, first, count);
332 log_err (dev, "pci_unregister_msix_handler: %U", format_clib_error, err);
333 clib_error_free (err);
334 return VNET_DEV_ERR_BUS;
337 for (u16 i = first; i < first + count; i++)
339 ASSERT (pdd->msix_handlers[i] != 0);
340 pdd->msix_handlers[i] = 0;
347 vnet_dev_pci_msix_enable (vlib_main_t *vm, vnet_dev_t *dev, u16 first,
350 vlib_pci_dev_handle_t h = vnet_dev_get_pci_handle (dev);
353 err = vlib_pci_enable_msix_irq (vm, h, first, count);
357 log_err (dev, "pci_enable_msix_irq: %U", format_clib_error, err);
358 clib_error_free (err);
359 return VNET_DEV_ERR_BUS;
366 vnet_dev_pci_msix_disable (vlib_main_t *vm, vnet_dev_t *dev, u16 first,
369 vlib_pci_dev_handle_t h = vnet_dev_get_pci_handle (dev);
372 err = vlib_pci_disable_msix_irq (vm, h, first, count);
376 log_err (dev, "pci_disble_msix_irq: %U", format_clib_error, err);
377 clib_error_free (err);
378 return VNET_DEV_ERR_BUS;
385 vnet_dev_pci_bus_master_disable (vlib_main_t *vm, vnet_dev_t *dev)
387 vlib_pci_dev_handle_t h = vnet_dev_get_pci_handle (dev);
390 if ((err = vlib_pci_bus_master_disable (vm, h)))
392 log_err (dev, "pci_bus_master_disable: %U", format_clib_error, err);
393 clib_error_free (err);
394 return VNET_DEV_ERR_BUS;
400 format_dev_pci_device_info (u8 *s, va_list *args)
402 vnet_dev_format_args_t __clib_unused *a =
403 va_arg (*args, vnet_dev_format_args_t *);
404 vnet_dev_t *dev = va_arg (*args, vnet_dev_t *);
405 vnet_dev_bus_pci_device_data_t *pdd = vnet_dev_get_bus_pci_device_data (dev);
406 vlib_main_t *vm = vlib_get_main ();
407 vlib_pci_config_t cfg = {};
410 s = format (s, "PCIe address is %U", format_vlib_pci_addr, &pdd->addr);
412 err = vlib_pci_read_write_config (vm, pdd->handle, VLIB_READ, 0, &cfg,
416 s = format (s, ", port is %U, speed is %U (max %U)",
417 format_vlib_pci_link_port, &cfg, format_vlib_pci_link_speed,
418 &cfg, format_vlib_pci_link_speed_cap, &cfg);
421 clib_error_free (err);
427 format_dev_pci_device_addr (u8 *s, va_list *args)
429 vnet_dev_t *dev = va_arg (*args, vnet_dev_t *);
430 vnet_dev_bus_pci_device_data_t *pdd = vnet_dev_get_bus_pci_device_data (dev);
431 return format (s, "%U", format_vlib_pci_addr, &pdd->addr);
434 VNET_DEV_REGISTER_BUS (pci) = {
436 .device_data_size = sizeof (vnet_dev_bus_pci_device_info_t),
438 .device_open = vnet_dev_bus_pci_open,
439 .device_close = vnet_dev_bus_pci_close,
440 .get_device_info = vnet_dev_bus_pci_get_device_info,
441 .free_device_info = vnet_dev_bus_pci_free_device_info,
442 .dma_mem_alloc_fn = vnet_dev_bus_pci_dma_mem_alloc,
443 .dma_mem_free_fn = vnet_dev_bus_pci_dma_mem_free,
444 .format_device_info = format_dev_pci_device_info,
445 .format_device_addr = format_dev_pci_device_addr,