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81 #include <sys/queue.h>
85 #include <rte_interrupts.h>
87 TAILQ_HEAD(pci_device_list, rte_pci_device); /**< PCI devices in D-linked Q. */
88 TAILQ_HEAD(pci_driver_list, rte_pci_driver); /**< PCI drivers in D-linked Q. */
90 extern struct pci_driver_list pci_driver_list; /**< Global list of PCI drivers. */
91 extern struct pci_device_list pci_device_list; /**< Global list of PCI devices. */
93 /** Pathname of PCI devices directory. */
94 const char *pci_get_sysfs_path(void);
96 /** Formatting string for PCI device identifier: Ex: 0000:00:01.0 */
97 #define PCI_PRI_FMT "%.4" PRIx16 ":%.2" PRIx8 ":%.2" PRIx8 ".%" PRIx8
99 /** Short formatting string, without domain, for PCI device: Ex: 00:01.0 */
100 #define PCI_SHORT_PRI_FMT "%.2" PRIx8 ":%.2" PRIx8 ".%" PRIx8
102 /** Nb. of values in PCI device identifier format string. */
103 #define PCI_FMT_NVAL 4
105 /** Nb. of values in PCI resource format. */
106 #define PCI_RESOURCE_FMT_NVAL 3
108 /** IO resource type: memory address space */
109 #define IORESOURCE_MEM 0x00000200
112 * A structure describing a PCI resource.
114 struct rte_pci_resource {
115 uint64_t phys_addr; /**< Physical address, 0 if no resource. */
116 uint64_t len; /**< Length of the resource. */
117 void *addr; /**< Virtual address, NULL when not mapped. */
120 /** Maximum number of PCI resources. */
121 #define PCI_MAX_RESOURCE 6
124 * A structure describing an ID for a PCI driver. Each driver provides a
125 * table of these IDs for each device that it supports.
128 uint32_t class_id; /**< Class ID (class, subclass, pi) or RTE_CLASS_ANY_ID. */
129 uint16_t vendor_id; /**< Vendor ID or PCI_ANY_ID. */
130 uint16_t device_id; /**< Device ID or PCI_ANY_ID. */
131 uint16_t subsystem_vendor_id; /**< Subsystem vendor ID or PCI_ANY_ID. */
132 uint16_t subsystem_device_id; /**< Subsystem device ID or PCI_ANY_ID. */
136 * A structure describing the location of a PCI device.
138 struct rte_pci_addr {
139 uint16_t domain; /**< Device domain */
140 uint8_t bus; /**< Device bus */
141 uint8_t devid; /**< Device ID */
142 uint8_t function; /**< Device function. */
147 enum rte_kernel_driver {
148 RTE_KDRV_UNKNOWN = 0,
151 RTE_KDRV_UIO_GENERIC,
157 * A structure describing a PCI device.
159 struct rte_pci_device {
160 TAILQ_ENTRY(rte_pci_device) next; /**< Next probed PCI device. */
161 struct rte_pci_addr addr; /**< PCI location. */
162 struct rte_pci_id id; /**< PCI ID. */
163 struct rte_pci_resource mem_resource[PCI_MAX_RESOURCE]; /**< PCI Memory Resource */
164 struct rte_intr_handle intr_handle; /**< Interrupt handle */
165 struct rte_pci_driver *driver; /**< Associated driver */
166 uint16_t max_vfs; /**< sriov enable if not zero */
167 int numa_node; /**< NUMA node connection */
168 struct rte_devargs *devargs; /**< Device user arguments */
169 enum rte_kernel_driver kdrv; /**< Kernel driver passthrough */
172 /** Any PCI device identifier (vendor, device, ...) */
173 #define PCI_ANY_ID (0xffff)
174 #define RTE_CLASS_ANY_ID (0xffffff)
177 /** C++ macro used to help building up tables of device IDs */
178 #define RTE_PCI_DEVICE(vend, dev) \
185 /** Macro used to help building up tables of device IDs */
186 #define RTE_PCI_DEVICE(vend, dev) \
187 .class_id = RTE_CLASS_ANY_ID, \
188 .vendor_id = (vend), \
189 .device_id = (dev), \
190 .subsystem_vendor_id = PCI_ANY_ID, \
191 .subsystem_device_id = PCI_ANY_ID
194 struct rte_pci_driver;
197 * Initialisation function for the driver called during PCI probing.
199 typedef int (pci_devinit_t)(struct rte_pci_driver *, struct rte_pci_device *);
202 * Uninitialisation function for the driver called during hotplugging.
204 typedef int (pci_devuninit_t)(struct rte_pci_device *);
207 * A structure describing a PCI driver.
209 struct rte_pci_driver {
210 TAILQ_ENTRY(rte_pci_driver) next; /**< Next in list. */
211 const char *name; /**< Driver name. */
212 pci_devinit_t *devinit; /**< Device init. function. */
213 pci_devuninit_t *devuninit; /**< Device uninit function. */
214 const struct rte_pci_id *id_table; /**< ID table, NULL terminated. */
215 uint32_t drv_flags; /**< Flags contolling handling of device. */
218 /** Device needs PCI BAR mapping (done with either IGB_UIO or VFIO) */
219 #define RTE_PCI_DRV_NEED_MAPPING 0x0001
220 /** Device needs to be unbound even if no module is provided */
221 #define RTE_PCI_DRV_FORCE_UNBIND 0x0004
222 /** Device driver supports link state interrupt */
223 #define RTE_PCI_DRV_INTR_LSC 0x0008
224 /** Device driver supports detaching capability */
225 #define RTE_PCI_DRV_DETACHABLE 0x0010
228 * A structure describing a PCI mapping.
239 * A structure describing a mapped PCI resource.
240 * For multi-process we need to reproduce all PCI mappings in secondary
241 * processes, so save them in a tailq.
243 struct mapped_pci_resource {
244 TAILQ_ENTRY(mapped_pci_resource) next;
246 struct rte_pci_addr pci_addr;
249 struct pci_map maps[PCI_MAX_RESOURCE];
252 /** mapped pci device list */
253 TAILQ_HEAD(mapped_pci_res_list, mapped_pci_resource);
255 /**< Internal use only - Macro used by pci addr parsing functions **/
256 #define GET_PCIADDR_FIELD(in, fd, lim, dlm) \
261 val = strtoul((in), &end, 16); \
262 if (errno != 0 || end[0] != (dlm) || val > (lim)) \
264 (fd) = (typeof (fd))val; \
269 * Utility function to produce a PCI Bus-Device-Function value
270 * given a string representation. Assumes that the BDF is provided without
271 * a domain prefix (i.e. domain returned is always 0)
274 * The input string to be parsed. Should have the format XX:XX.X
276 * The PCI Bus-Device-Function address to be returned. Domain will always be
279 * 0 on success, negative on error.
282 eal_parse_pci_BDF(const char *input, struct rte_pci_addr *dev_addr)
284 dev_addr->domain = 0;
285 GET_PCIADDR_FIELD(input, dev_addr->bus, UINT8_MAX, ':');
286 GET_PCIADDR_FIELD(input, dev_addr->devid, UINT8_MAX, '.');
287 GET_PCIADDR_FIELD(input, dev_addr->function, UINT8_MAX, 0);
292 * Utility function to produce a PCI Bus-Device-Function value
293 * given a string representation. Assumes that the BDF is provided including
297 * The input string to be parsed. Should have the format XXXX:XX:XX.X
299 * The PCI Bus-Device-Function address to be returned
301 * 0 on success, negative on error.
304 eal_parse_pci_DomBDF(const char *input, struct rte_pci_addr *dev_addr)
306 GET_PCIADDR_FIELD(input, dev_addr->domain, UINT16_MAX, ':');
307 GET_PCIADDR_FIELD(input, dev_addr->bus, UINT8_MAX, ':');
308 GET_PCIADDR_FIELD(input, dev_addr->devid, UINT8_MAX, '.');
309 GET_PCIADDR_FIELD(input, dev_addr->function, UINT8_MAX, 0);
312 #undef GET_PCIADDR_FIELD
314 /* Compare two PCI device addresses. */
316 * Utility function to compare two PCI device addresses.
319 * The PCI Bus-Device-Function address to compare
321 * The PCI Bus-Device-Function address to compare
323 * 0 on equal PCI address.
324 * Positive on addr is greater than addr2.
325 * Negative on addr is less than addr2, or error.
328 rte_eal_compare_pci_addr(const struct rte_pci_addr *addr,
329 const struct rte_pci_addr *addr2)
331 uint64_t dev_addr, dev_addr2;
333 if ((addr == NULL) || (addr2 == NULL))
336 dev_addr = (addr->domain << 24) | (addr->bus << 16) |
337 (addr->devid << 8) | addr->function;
338 dev_addr2 = (addr2->domain << 24) | (addr2->bus << 16) |
339 (addr2->devid << 8) | addr2->function;
341 if (dev_addr > dev_addr2)
343 else if (dev_addr < dev_addr2)
350 * Scan the content of the PCI bus, and the devices in the devices
354 * 0 on success, negative on error
356 int rte_eal_pci_scan(void);
359 * Probe the PCI bus for registered drivers.
361 * Scan the content of the PCI bus, and call the probe() function for
362 * all registered drivers that have a matching entry in its id_table
363 * for discovered devices.
367 * - Negative on error.
369 int rte_eal_pci_probe(void);
372 * Map the PCI device resources in user space virtual memory address
374 * Note that driver should not call this function when flag
375 * RTE_PCI_DRV_NEED_MAPPING is set, as EAL will do that for
379 * A pointer to a rte_pci_device structure describing the device
383 * 0 on success, negative on error and positive if no driver
384 * is found for the device.
386 int rte_eal_pci_map_device(struct rte_pci_device *dev);
392 * A pointer to a rte_pci_device structure describing the device
395 void rte_eal_pci_unmap_device(struct rte_pci_device *dev);
399 * Map a particular resource from a file.
401 * @param requested_addr
402 * The starting address for the new mapping range.
404 * The file descriptor.
406 * The offset for the mapping range.
408 * The size for the mapping range.
409 * @param additional_flags
410 * The additional flags for the mapping range.
412 * - On success, the function returns a pointer to the mapped area.
413 * - On error, the value MAP_FAILED is returned.
415 void *pci_map_resource(void *requested_addr, int fd, off_t offset,
416 size_t size, int additional_flags);
420 * Unmap a particular resource.
422 * @param requested_addr
423 * The address for the unmapping range.
425 * The size for the unmapping range.
427 void pci_unmap_resource(void *requested_addr, size_t size);
430 * Probe the single PCI device.
432 * Scan the content of the PCI bus, and find the pci device specified by pci
433 * address, then call the probe() function for registered driver that has a
434 * matching entry in its id_table for discovered device.
437 * The PCI Bus-Device-Function address to probe.
440 * - Negative on error.
442 int rte_eal_pci_probe_one(const struct rte_pci_addr *addr);
445 * Close the single PCI device.
447 * Scan the content of the PCI bus, and find the pci device specified by pci
448 * address, then call the devuninit() function for registered driver that has a
449 * matching entry in its id_table for discovered device.
452 * The PCI Bus-Device-Function address to close.
455 * - Negative on error.
457 int rte_eal_pci_detach(const struct rte_pci_addr *addr);
460 * Dump the content of the PCI bus.
463 * A pointer to a file for output
465 void rte_eal_pci_dump(FILE *f);
468 * Register a PCI driver.
471 * A pointer to a rte_pci_driver structure describing the driver
474 void rte_eal_pci_register(struct rte_pci_driver *driver);
477 * Unregister a PCI driver.
480 * A pointer to a rte_pci_driver structure describing the driver
481 * to be unregistered.
483 void rte_eal_pci_unregister(struct rte_pci_driver *driver);
486 * Read PCI config space.
489 * A pointer to a rte_pci_device structure describing the device
492 * A data buffer where the bytes should be read into
494 * The length of the data buffer.
496 * The offset into PCI config space
498 int rte_eal_pci_read_config(const struct rte_pci_device *device,
499 void *buf, size_t len, off_t offset);
502 * Write PCI config space.
505 * A pointer to a rte_pci_device structure describing the device
508 * A data buffer containing the bytes should be written
510 * The length of the data buffer.
512 * The offset into PCI config space
514 int rte_eal_pci_write_config(const struct rte_pci_device *device,
515 const void *buf, size_t len, off_t offset);
518 * A structure used to access io resources for a pci device.
519 * rte_pci_ioport is arch, os, driver specific, and should not be used outside
522 struct rte_pci_ioport {
523 struct rte_pci_device *dev;
528 * Initialize a rte_pci_ioport object for a pci device io resource.
530 * This object is then used to gain access to those io resources (see below).
533 * A pointer to a rte_pci_device structure describing the device
536 * Index of the io pci resource we want to access.
538 * The rte_pci_ioport object to be initialized.
540 * 0 on success, negative on error.
542 int rte_eal_pci_ioport_map(struct rte_pci_device *dev, int bar,
543 struct rte_pci_ioport *p);
546 * Release any resources used in a rte_pci_ioport object.
549 * The rte_pci_ioport object to be uninitialized.
551 * 0 on success, negative on error.
553 int rte_eal_pci_ioport_unmap(struct rte_pci_ioport *p);
556 * Read from a io pci resource.
559 * The rte_pci_ioport object from which we want to read.
561 * A data buffer where the bytes should be read into
563 * The length of the data buffer.
565 * The offset into the pci io resource.
567 void rte_eal_pci_ioport_read(struct rte_pci_ioport *p,
568 void *data, size_t len, off_t offset);
571 * Write to a io pci resource.
574 * The rte_pci_ioport object to which we want to write.
576 * A data buffer where the bytes should be read into
578 * The length of the data buffer.
580 * The offset into the pci io resource.
582 void rte_eal_pci_ioport_write(struct rte_pci_ioport *p,
583 const void *data, size_t len, off_t offset);
589 #endif /* _RTE_PCI_H_ */