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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
107 /** IO resource type: memory address space */
108 #define IORESOURCE_MEM 0x00000200
111 * A structure describing a PCI resource.
113 struct rte_pci_resource {
114 uint64_t phys_addr; /**< Physical address, 0 if no resource. */
115 uint64_t len; /**< Length of the resource. */
116 void *addr; /**< Virtual address, NULL when not mapped. */
119 /** Maximum number of PCI resources. */
120 #define PCI_MAX_RESOURCE 6
123 * A structure describing an ID for a PCI driver. Each driver provides a
124 * table of these IDs for each device that it supports.
127 uint16_t vendor_id; /**< Vendor ID or PCI_ANY_ID. */
128 uint16_t device_id; /**< Device ID or PCI_ANY_ID. */
129 uint16_t subsystem_vendor_id; /**< Subsystem vendor ID or PCI_ANY_ID. */
130 uint16_t subsystem_device_id; /**< Subsystem device ID or PCI_ANY_ID. */
134 * A structure describing the location of a PCI device.
136 struct rte_pci_addr {
137 uint16_t domain; /**< Device domain */
138 uint8_t bus; /**< Device bus */
139 uint8_t devid; /**< Device ID */
140 uint8_t function; /**< Device function. */
149 RTE_PT_UIO_GENERIC = 3,
153 * A structure describing a PCI device.
155 struct rte_pci_device {
156 TAILQ_ENTRY(rte_pci_device) next; /**< Next probed PCI device. */
157 struct rte_pci_addr addr; /**< PCI location. */
158 struct rte_pci_id id; /**< PCI ID. */
159 struct rte_pci_resource mem_resource[PCI_MAX_RESOURCE]; /**< PCI Memory Resource */
160 struct rte_intr_handle intr_handle; /**< Interrupt handle */
161 const struct rte_pci_driver *driver; /**< Associated driver */
162 uint16_t max_vfs; /**< sriov enable if not zero */
163 int numa_node; /**< NUMA node connection */
164 struct rte_devargs *devargs; /**< Device user arguments */
165 enum rte_pt_driver pt_driver; /**< Driver of passthrough */
168 /** Any PCI device identifier (vendor, device, ...) */
169 #define PCI_ANY_ID (0xffff)
172 /** C++ macro used to help building up tables of device IDs */
173 #define RTE_PCI_DEVICE(vend, dev) \
179 /** Macro used to help building up tables of device IDs */
180 #define RTE_PCI_DEVICE(vend, dev) \
181 .vendor_id = (vend), \
182 .device_id = (dev), \
183 .subsystem_vendor_id = PCI_ANY_ID, \
184 .subsystem_device_id = PCI_ANY_ID
187 struct rte_pci_driver;
190 * Initialisation function for the driver called during PCI probing.
192 typedef int (pci_devinit_t)(struct rte_pci_driver *, struct rte_pci_device *);
195 * A structure describing a PCI driver.
197 struct rte_pci_driver {
198 TAILQ_ENTRY(rte_pci_driver) next; /**< Next in list. */
199 const char *name; /**< Driver name. */
200 pci_devinit_t *devinit; /**< Device init. function. */
201 struct rte_pci_id *id_table; /**< ID table, NULL terminated. */
202 uint32_t drv_flags; /**< Flags contolling handling of device. */
205 /** Device needs PCI BAR mapping (done with either IGB_UIO or VFIO) */
206 #define RTE_PCI_DRV_NEED_MAPPING 0x0001
207 /** Device driver must be registered several times until failure - deprecated */
208 #pragma GCC poison RTE_PCI_DRV_MULTIPLE
209 /** Device needs to be unbound even if no module is provided */
210 #define RTE_PCI_DRV_FORCE_UNBIND 0x0004
211 /** Device driver supports link state interrupt */
212 #define RTE_PCI_DRV_INTR_LSC 0x0008
214 /**< Internal use only - Macro used by pci addr parsing functions **/
215 #define GET_PCIADDR_FIELD(in, fd, lim, dlm) \
220 val = strtoul((in), &end, 16); \
221 if (errno != 0 || end[0] != (dlm) || val > (lim)) \
223 (fd) = (typeof (fd))val; \
228 * Utility function to produce a PCI Bus-Device-Function value
229 * given a string representation. Assumes that the BDF is provided without
230 * a domain prefix (i.e. domain returned is always 0)
233 * The input string to be parsed. Should have the format XX:XX.X
235 * The PCI Bus-Device-Function address to be returned. Domain will always be
238 * 0 on success, negative on error.
241 eal_parse_pci_BDF(const char *input, struct rte_pci_addr *dev_addr)
243 dev_addr->domain = 0;
244 GET_PCIADDR_FIELD(input, dev_addr->bus, UINT8_MAX, ':');
245 GET_PCIADDR_FIELD(input, dev_addr->devid, UINT8_MAX, '.');
246 GET_PCIADDR_FIELD(input, dev_addr->function, UINT8_MAX, 0);
251 * Utility function to produce a PCI Bus-Device-Function value
252 * given a string representation. Assumes that the BDF is provided including
256 * The input string to be parsed. Should have the format XXXX:XX:XX.X
258 * The PCI Bus-Device-Function address to be returned
260 * 0 on success, negative on error.
263 eal_parse_pci_DomBDF(const char *input, struct rte_pci_addr *dev_addr)
265 GET_PCIADDR_FIELD(input, dev_addr->domain, UINT16_MAX, ':');
266 GET_PCIADDR_FIELD(input, dev_addr->bus, UINT8_MAX, ':');
267 GET_PCIADDR_FIELD(input, dev_addr->devid, UINT8_MAX, '.');
268 GET_PCIADDR_FIELD(input, dev_addr->function, UINT8_MAX, 0);
271 #undef GET_PCIADDR_FIELD
274 * Probe the PCI bus for registered drivers.
276 * Scan the content of the PCI bus, and call the probe() function for
277 * all registered drivers that have a matching entry in its id_table
278 * for discovered devices.
282 * - Negative on error.
284 int rte_eal_pci_probe(void);
287 * Dump the content of the PCI bus.
290 * A pointer to a file for output
292 void rte_eal_pci_dump(FILE *f);
295 * Register a PCI driver.
298 * A pointer to a rte_pci_driver structure describing the driver
301 void rte_eal_pci_register(struct rte_pci_driver *driver);
304 * Unregister a PCI driver.
307 * A pointer to a rte_pci_driver structure describing the driver
308 * to be unregistered.
310 void rte_eal_pci_unregister(struct rte_pci_driver *driver);
316 #endif /* _RTE_PCI_H_ */