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81 #include <sys/queue.h>
85 #include <rte_debug.h>
86 #include <rte_interrupts.h>
89 TAILQ_HEAD(pci_device_list, rte_pci_device); /**< PCI devices in D-linked Q. */
90 TAILQ_HEAD(pci_driver_list, rte_pci_driver); /**< PCI drivers in D-linked Q. */
92 extern struct pci_driver_list pci_driver_list; /**< Global list of PCI drivers. */
93 extern struct pci_device_list pci_device_list; /**< Global list of PCI devices. */
95 /** Pathname of PCI devices directory. */
96 const char *pci_get_sysfs_path(void);
98 /** Formatting string for PCI device identifier: Ex: 0000:00:01.0 */
99 #define PCI_PRI_FMT "%.4" PRIx16 ":%.2" PRIx8 ":%.2" PRIx8 ".%" PRIx8
100 #define PCI_PRI_STR_SIZE sizeof("XXXX:XX:XX.X")
102 /** Short formatting string, without domain, for PCI device: Ex: 00:01.0 */
103 #define PCI_SHORT_PRI_FMT "%.2" PRIx8 ":%.2" PRIx8 ".%" PRIx8
105 /** Nb. of values in PCI device identifier format string. */
106 #define PCI_FMT_NVAL 4
108 /** Nb. of values in PCI resource format. */
109 #define PCI_RESOURCE_FMT_NVAL 3
111 /** Maximum number of PCI resources. */
112 #define PCI_MAX_RESOURCE 6
115 * A structure describing an ID for a PCI driver. Each driver provides a
116 * table of these IDs for each device that it supports.
119 uint32_t class_id; /**< Class ID (class, subclass, pi) or RTE_CLASS_ANY_ID. */
120 uint16_t vendor_id; /**< Vendor ID or PCI_ANY_ID. */
121 uint16_t device_id; /**< Device ID or PCI_ANY_ID. */
122 uint16_t subsystem_vendor_id; /**< Subsystem vendor ID or PCI_ANY_ID. */
123 uint16_t subsystem_device_id; /**< Subsystem device ID or PCI_ANY_ID. */
127 * A structure describing the location of a PCI device.
129 struct rte_pci_addr {
130 uint16_t domain; /**< Device domain */
131 uint8_t bus; /**< Device bus */
132 uint8_t devid; /**< Device ID */
133 uint8_t function; /**< Device function. */
138 enum rte_kernel_driver {
139 RTE_KDRV_UNKNOWN = 0,
142 RTE_KDRV_UIO_GENERIC,
148 * A structure describing a PCI device.
150 struct rte_pci_device {
151 TAILQ_ENTRY(rte_pci_device) next; /**< Next probed PCI device. */
152 struct rte_device device; /**< Inherit core device */
153 struct rte_pci_addr addr; /**< PCI location. */
154 struct rte_pci_id id; /**< PCI ID. */
155 struct rte_mem_resource mem_resource[PCI_MAX_RESOURCE];
156 /**< PCI Memory Resource */
157 struct rte_intr_handle intr_handle; /**< Interrupt handle */
158 struct rte_pci_driver *driver; /**< Associated driver */
159 uint16_t max_vfs; /**< sriov enable if not zero */
160 enum rte_kernel_driver kdrv; /**< Kernel driver passthrough */
163 /** Any PCI device identifier (vendor, device, ...) */
164 #define PCI_ANY_ID (0xffff)
165 #define RTE_CLASS_ANY_ID (0xffffff)
168 /** C++ macro used to help building up tables of device IDs */
169 #define RTE_PCI_DEVICE(vend, dev) \
176 /** Macro used to help building up tables of device IDs */
177 #define RTE_PCI_DEVICE(vend, dev) \
178 .class_id = RTE_CLASS_ANY_ID, \
179 .vendor_id = (vend), \
180 .device_id = (dev), \
181 .subsystem_vendor_id = PCI_ANY_ID, \
182 .subsystem_device_id = PCI_ANY_ID
185 struct rte_pci_driver;
188 * Initialisation function for the driver called during PCI probing.
190 typedef int (pci_probe_t)(struct rte_pci_driver *, struct rte_pci_device *);
193 * Uninitialisation function for the driver called during hotplugging.
195 typedef int (pci_remove_t)(struct rte_pci_device *);
198 * A structure describing a PCI driver.
200 struct rte_pci_driver {
201 TAILQ_ENTRY(rte_pci_driver) next; /**< Next in list. */
202 struct rte_driver driver; /**< Inherit core driver. */
203 pci_probe_t *probe; /**< Device Probe function. */
204 pci_remove_t *remove; /**< Device Remove function. */
205 const struct rte_pci_id *id_table; /**< ID table, NULL terminated. */
206 uint32_t drv_flags; /**< Flags contolling handling of device. */
209 /** Device needs PCI BAR mapping (done with either IGB_UIO or VFIO) */
210 #define RTE_PCI_DRV_NEED_MAPPING 0x0001
211 /** Device driver supports link state interrupt */
212 #define RTE_PCI_DRV_INTR_LSC 0x0008
213 /** Device driver supports detaching capability */
214 #define RTE_PCI_DRV_DETACHABLE 0x0010
217 * A structure describing a PCI mapping.
228 * A structure describing a mapped PCI resource.
229 * For multi-process we need to reproduce all PCI mappings in secondary
230 * processes, so save them in a tailq.
232 struct mapped_pci_resource {
233 TAILQ_ENTRY(mapped_pci_resource) next;
235 struct rte_pci_addr pci_addr;
238 struct pci_map maps[PCI_MAX_RESOURCE];
241 /** mapped pci device list */
242 TAILQ_HEAD(mapped_pci_res_list, mapped_pci_resource);
244 /**< Internal use only - Macro used by pci addr parsing functions **/
245 #define GET_PCIADDR_FIELD(in, fd, lim, dlm) \
250 val = strtoul((in), &end, 16); \
251 if (errno != 0 || end[0] != (dlm) || val > (lim)) \
253 (fd) = (typeof (fd))val; \
258 * Utility function to produce a PCI Bus-Device-Function value
259 * given a string representation. Assumes that the BDF is provided without
260 * a domain prefix (i.e. domain returned is always 0)
263 * The input string to be parsed. Should have the format XX:XX.X
265 * The PCI Bus-Device-Function address to be returned. Domain will always be
268 * 0 on success, negative on error.
271 eal_parse_pci_BDF(const char *input, struct rte_pci_addr *dev_addr)
273 dev_addr->domain = 0;
274 GET_PCIADDR_FIELD(input, dev_addr->bus, UINT8_MAX, ':');
275 GET_PCIADDR_FIELD(input, dev_addr->devid, UINT8_MAX, '.');
276 GET_PCIADDR_FIELD(input, dev_addr->function, UINT8_MAX, 0);
281 * Utility function to produce a PCI Bus-Device-Function value
282 * given a string representation. Assumes that the BDF is provided including
286 * The input string to be parsed. Should have the format XXXX:XX:XX.X
288 * The PCI Bus-Device-Function address to be returned
290 * 0 on success, negative on error.
293 eal_parse_pci_DomBDF(const char *input, struct rte_pci_addr *dev_addr)
295 GET_PCIADDR_FIELD(input, dev_addr->domain, UINT16_MAX, ':');
296 GET_PCIADDR_FIELD(input, dev_addr->bus, UINT8_MAX, ':');
297 GET_PCIADDR_FIELD(input, dev_addr->devid, UINT8_MAX, '.');
298 GET_PCIADDR_FIELD(input, dev_addr->function, UINT8_MAX, 0);
301 #undef GET_PCIADDR_FIELD
304 * Utility function to write a pci device name, this device name can later be
305 * used to retrieve the corresponding rte_pci_addr using eal_parse_pci_*
309 * The PCI Bus-Device-Function address
311 * The output buffer string
313 * The output buffer size
316 rte_eal_pci_device_name(const struct rte_pci_addr *addr,
317 char *output, size_t size)
319 RTE_VERIFY(size >= PCI_PRI_STR_SIZE);
320 RTE_VERIFY(snprintf(output, size, PCI_PRI_FMT,
321 addr->domain, addr->bus,
322 addr->devid, addr->function) >= 0);
325 /* Compare two PCI device addresses. */
327 * Utility function to compare two PCI device addresses.
330 * The PCI Bus-Device-Function address to compare
332 * The PCI Bus-Device-Function address to compare
334 * 0 on equal PCI address.
335 * Positive on addr is greater than addr2.
336 * Negative on addr is less than addr2, or error.
339 rte_eal_compare_pci_addr(const struct rte_pci_addr *addr,
340 const struct rte_pci_addr *addr2)
342 uint64_t dev_addr, dev_addr2;
344 if ((addr == NULL) || (addr2 == NULL))
347 dev_addr = (addr->domain << 24) | (addr->bus << 16) |
348 (addr->devid << 8) | addr->function;
349 dev_addr2 = (addr2->domain << 24) | (addr2->bus << 16) |
350 (addr2->devid << 8) | addr2->function;
352 if (dev_addr > dev_addr2)
354 else if (dev_addr < dev_addr2)
361 * Scan the content of the PCI bus, and the devices in the devices
365 * 0 on success, negative on error
367 int rte_eal_pci_scan(void);
370 * Probe the PCI bus for registered drivers.
372 * Scan the content of the PCI bus, and call the probe() function for
373 * all registered drivers that have a matching entry in its id_table
374 * for discovered devices.
378 * - Negative on error.
380 int rte_eal_pci_probe(void);
383 * Map the PCI device resources in user space virtual memory address
385 * Note that driver should not call this function when flag
386 * RTE_PCI_DRV_NEED_MAPPING is set, as EAL will do that for
390 * A pointer to a rte_pci_device structure describing the device
394 * 0 on success, negative on error and positive if no driver
395 * is found for the device.
397 int rte_eal_pci_map_device(struct rte_pci_device *dev);
403 * A pointer to a rte_pci_device structure describing the device
406 void rte_eal_pci_unmap_device(struct rte_pci_device *dev);
410 * Map a particular resource from a file.
412 * @param requested_addr
413 * The starting address for the new mapping range.
415 * The file descriptor.
417 * The offset for the mapping range.
419 * The size for the mapping range.
420 * @param additional_flags
421 * The additional flags for the mapping range.
423 * - On success, the function returns a pointer to the mapped area.
424 * - On error, the value MAP_FAILED is returned.
426 void *pci_map_resource(void *requested_addr, int fd, off_t offset,
427 size_t size, int additional_flags);
431 * Unmap a particular resource.
433 * @param requested_addr
434 * The address for the unmapping range.
436 * The size for the unmapping range.
438 void pci_unmap_resource(void *requested_addr, size_t size);
441 * Probe the single PCI device.
443 * Scan the content of the PCI bus, and find the pci device specified by pci
444 * address, then call the probe() function for registered driver that has a
445 * matching entry in its id_table for discovered device.
448 * The PCI Bus-Device-Function address to probe.
451 * - Negative on error.
453 int rte_eal_pci_probe_one(const struct rte_pci_addr *addr);
456 * Close the single PCI device.
458 * Scan the content of the PCI bus, and find the pci device specified by pci
459 * address, then call the remove() function for registered driver that has a
460 * matching entry in its id_table for discovered device.
463 * The PCI Bus-Device-Function address to close.
466 * - Negative on error.
468 int rte_eal_pci_detach(const struct rte_pci_addr *addr);
471 * Dump the content of the PCI bus.
474 * A pointer to a file for output
476 void rte_eal_pci_dump(FILE *f);
479 * Register a PCI driver.
482 * A pointer to a rte_pci_driver structure describing the driver
485 void rte_eal_pci_register(struct rte_pci_driver *driver);
487 /** Helper for PCI device registration from driver (eth, crypto) instance */
488 #define RTE_PMD_REGISTER_PCI(nm, pci_drv) \
489 RTE_INIT(pciinitfn_ ##nm); \
490 static void pciinitfn_ ##nm(void) \
492 (pci_drv).driver.name = RTE_STR(nm);\
493 rte_eal_pci_register(&pci_drv); \
495 RTE_PMD_EXPORT_NAME(nm, __COUNTER__)
498 * Unregister a PCI driver.
501 * A pointer to a rte_pci_driver structure describing the driver
502 * to be unregistered.
504 void rte_eal_pci_unregister(struct rte_pci_driver *driver);
507 * Read PCI config space.
510 * A pointer to a rte_pci_device structure describing the device
513 * A data buffer where the bytes should be read into
515 * The length of the data buffer.
517 * The offset into PCI config space
519 int rte_eal_pci_read_config(const struct rte_pci_device *device,
520 void *buf, size_t len, off_t offset);
523 * Write PCI config space.
526 * A pointer to a rte_pci_device structure describing the device
529 * A data buffer containing the bytes should be written
531 * The length of the data buffer.
533 * The offset into PCI config space
535 int rte_eal_pci_write_config(const struct rte_pci_device *device,
536 const void *buf, size_t len, off_t offset);
539 * A structure used to access io resources for a pci device.
540 * rte_pci_ioport is arch, os, driver specific, and should not be used outside
543 struct rte_pci_ioport {
544 struct rte_pci_device *dev;
546 uint64_t len; /* only filled for memory mapped ports */
550 * Initialize a rte_pci_ioport object for a pci device io resource.
552 * This object is then used to gain access to those io resources (see below).
555 * A pointer to a rte_pci_device structure describing the device
558 * Index of the io pci resource we want to access.
560 * The rte_pci_ioport object to be initialized.
562 * 0 on success, negative on error.
564 int rte_eal_pci_ioport_map(struct rte_pci_device *dev, int bar,
565 struct rte_pci_ioport *p);
568 * Release any resources used in a rte_pci_ioport object.
571 * The rte_pci_ioport object to be uninitialized.
573 * 0 on success, negative on error.
575 int rte_eal_pci_ioport_unmap(struct rte_pci_ioport *p);
578 * Read from a io pci resource.
581 * The rte_pci_ioport object from which we want to read.
583 * A data buffer where the bytes should be read into
585 * The length of the data buffer.
587 * The offset into the pci io resource.
589 void rte_eal_pci_ioport_read(struct rte_pci_ioport *p,
590 void *data, size_t len, off_t offset);
593 * Write to a io pci resource.
596 * The rte_pci_ioport object to which we want to write.
598 * A data buffer where the bytes should be read into
600 * The length of the data buffer.
602 * The offset into the pci io resource.
604 void rte_eal_pci_ioport_write(struct rte_pci_ioport *p,
605 const void *data, size_t len, off_t offset);
611 #endif /* _RTE_PCI_H_ */