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80 #include <sys/queue.h>
84 #include <rte_interrupts.h>
86 TAILQ_HEAD(pci_device_list, rte_pci_device); /**< PCI devices in D-linked Q. */
87 TAILQ_HEAD(pci_driver_list, rte_pci_driver); /**< PCI drivers in D-linked Q. */
89 extern struct pci_driver_list pci_driver_list; /**< Global list of PCI drivers. */
90 extern struct pci_device_list pci_device_list; /**< Global list of PCI devices. */
92 /** Pathname of PCI devices directory. */
93 #define SYSFS_PCI_DEVICES "/sys/bus/pci/devices"
95 /** Formatting string for PCI device identifier: Ex: 0000:00:01.0 */
96 #define PCI_PRI_FMT "%.4"PRIx16":%.2"PRIx8":%.2"PRIx8".%"PRIx8
98 /** Short formatting string, without domain, for PCI device: Ex: 00:01.0 */
99 #define PCI_SHORT_PRI_FMT "%.2"PRIx8":%.2"PRIx8".%"PRIx8
101 /** Nb. of values in PCI device identifier format string. */
102 #define PCI_FMT_NVAL 4
104 /** Nb. of values in PCI resource format. */
105 #define PCI_RESOURCE_FMT_NVAL 3
108 * A structure describing a PCI resource.
110 struct rte_pci_resource {
111 uint64_t phys_addr; /**< Physical address, 0 if no resource. */
112 uint64_t len; /**< Length of the resource. */
113 void *addr; /**< Virtual address, NULL when not mapped. */
116 /** Maximum number of PCI resources. */
117 #define PCI_MAX_RESOURCE 7
120 * A structure describing an ID for a PCI driver. Each driver provides a
121 * table of these IDs for each device that it supports.
124 uint16_t vendor_id; /**< Vendor ID or PCI_ANY_ID. */
125 uint16_t device_id; /**< Device ID or PCI_ANY_ID. */
126 uint16_t subsystem_vendor_id; /**< Subsystem vendor ID or PCI_ANY_ID. */
127 uint16_t subsystem_device_id; /**< Subsystem device ID or PCI_ANY_ID. */
131 * A structure describing the location of a PCI device.
133 struct rte_pci_addr {
134 uint16_t domain; /**< Device domain */
135 uint8_t bus; /**< Device bus */
136 uint8_t devid; /**< Device ID */
137 uint8_t function; /**< Device function. */
143 * A structure describing a PCI device.
145 struct rte_pci_device {
146 TAILQ_ENTRY(rte_pci_device) next; /**< Next probed PCI device. */
147 struct rte_pci_addr addr; /**< PCI location. */
148 struct rte_pci_id id; /**< PCI ID. */
149 struct rte_pci_resource mem_resource[PCI_MAX_RESOURCE]; /**< PCI Memory Resource */
150 struct rte_intr_handle intr_handle; /**< Interrupt handle */
151 const struct rte_pci_driver *driver; /**< Associated driver */
152 uint16_t max_vfs; /**< sriov enable if not zero */
153 int numa_node; /**< NUMA node connection */
154 struct rte_devargs *devargs; /**< Device user arguments */
157 /** Any PCI device identifier (vendor, device, ...) */
158 #define PCI_ANY_ID (0xffff)
161 /** C++ macro used to help building up tables of device IDs */
162 #define RTE_PCI_DEVICE(vend, dev) \
168 /** Macro used to help building up tables of device IDs */
169 #define RTE_PCI_DEVICE(vend, dev) \
170 .vendor_id = (vend), \
171 .device_id = (dev), \
172 .subsystem_vendor_id = PCI_ANY_ID, \
173 .subsystem_device_id = PCI_ANY_ID
176 struct rte_pci_driver;
179 * Initialisation function for the driver called during PCI probing.
181 typedef int (pci_devinit_t)(struct rte_pci_driver *, struct rte_pci_device *);
184 * A structure describing a PCI driver.
186 struct rte_pci_driver {
187 TAILQ_ENTRY(rte_pci_driver) next; /**< Next in list. */
188 const char *name; /**< Driver name. */
189 pci_devinit_t *devinit; /**< Device init. function. */
190 struct rte_pci_id *id_table; /**< ID table, NULL terminated. */
191 uint32_t drv_flags; /**< Flags contolling handling of device. */
194 /** Device needs PCI BAR mapping (done with either IGB_UIO or VFIO) */
195 #define RTE_PCI_DRV_NEED_MAPPING 0x0001
196 /** Device driver must be registered several times until failure */
197 #define RTE_PCI_DRV_MULTIPLE 0x0002
198 /** Device needs to be unbound even if no module is provided */
199 #define RTE_PCI_DRV_FORCE_UNBIND 0x0004
200 /** Device driver supports link state interrupt */
201 #define RTE_PCI_DRV_INTR_LSC 0x0008
203 /**< Internal use only - Macro used by pci addr parsing functions **/
204 #define GET_PCIADDR_FIELD(in, fd, lim, dlm) \
209 val = strtoul((in), &end, 16); \
210 if (errno != 0 || end[0] != (dlm) || val > (lim)) \
212 (fd) = (typeof (fd))val; \
217 * Utility function to produce a PCI Bus-Device-Function value
218 * given a string representation. Assumes that the BDF is provided without
219 * a domain prefix (i.e. domain returned is always 0)
222 * The input string to be parsed. Should have the format XX:XX.X
224 * The PCI Bus-Device-Function address to be returned. Domain will always be
227 * 0 on success, negative on error.
230 eal_parse_pci_BDF(const char *input, struct rte_pci_addr *dev_addr)
232 dev_addr->domain = 0;
233 GET_PCIADDR_FIELD(input, dev_addr->bus, UINT8_MAX, ':');
234 GET_PCIADDR_FIELD(input, dev_addr->devid, UINT8_MAX, '.');
235 GET_PCIADDR_FIELD(input, dev_addr->function, UINT8_MAX, 0);
240 * Utility function to produce a PCI Bus-Device-Function value
241 * given a string representation. Assumes that the BDF is provided including
245 * The input string to be parsed. Should have the format XXXX:XX:XX.X
247 * The PCI Bus-Device-Function address to be returned
249 * 0 on success, negative on error.
252 eal_parse_pci_DomBDF(const char *input, struct rte_pci_addr *dev_addr)
254 GET_PCIADDR_FIELD(input, dev_addr->domain, UINT16_MAX, ':');
255 GET_PCIADDR_FIELD(input, dev_addr->bus, UINT8_MAX, ':');
256 GET_PCIADDR_FIELD(input, dev_addr->devid, UINT8_MAX, '.');
257 GET_PCIADDR_FIELD(input, dev_addr->function, UINT8_MAX, 0);
260 #undef GET_PCIADDR_FIELD
263 * Probe the PCI bus for registered drivers.
265 * Scan the content of the PCI bus, and call the probe() function for
266 * all registered drivers that have a matching entry in its id_table
267 * for discovered devices.
271 * - Negative on error.
273 int rte_eal_pci_probe(void);
276 * Dump the content of the PCI bus.
279 * A pointer to a file for output
281 void rte_eal_pci_dump(FILE *f);
284 * Register a PCI driver.
287 * A pointer to a rte_pci_driver structure describing the driver
290 void rte_eal_pci_register(struct rte_pci_driver *driver);
293 * Unregister a PCI driver.
296 * A pointer to a rte_pci_driver structure describing the driver
297 * to be unregistered.
299 void rte_eal_pci_unregister(struct rte_pci_driver *driver);
305 #endif /* _RTE_PCI_H_ */