X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Flibrte_eal%2Fcommon%2Finclude%2Frte_pci.h;h=8557e477dd3c57a937eb8e77e73f1287ecb65394;hb=2eed820fd4fdea456103402e0ad13f955321e6cc;hp=ac30925b8fb45c586c4e6ba82d9b2b965590595f;hpb=c282abd2a6cddc37443164eb0a3f34746527bacd;p=dpdk.git diff --git a/lib/librte_eal/common/include/rte_pci.h b/lib/librte_eal/common/include/rte_pci.h index ac30925b8f..8557e477dd 100644 --- a/lib/librte_eal/common/include/rte_pci.h +++ b/lib/librte_eal/common/include/rte_pci.h @@ -1,7 +1,7 @@ /*- * BSD LICENSE * - * Copyright(c) 2010-2014 Intel Corporation. All rights reserved. + * Copyright(c) 2010-2015 Intel Corporation. All rights reserved. * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -74,6 +74,7 @@ extern "C" { #endif +#include #include #include #include @@ -81,7 +82,9 @@ extern "C" { #include #include +#include #include +#include TAILQ_HEAD(pci_device_list, rte_pci_device); /**< PCI devices in D-linked Q. */ TAILQ_HEAD(pci_driver_list, rte_pci_driver); /**< PCI drivers in D-linked Q. */ @@ -90,10 +93,11 @@ extern struct pci_driver_list pci_driver_list; /**< Global list of PCI drivers. extern struct pci_device_list pci_device_list; /**< Global list of PCI devices. */ /** Pathname of PCI devices directory. */ -#define SYSFS_PCI_DEVICES "/sys/bus/pci/devices" +const char *pci_get_sysfs_path(void); /** Formatting string for PCI device identifier: Ex: 0000:00:01.0 */ #define PCI_PRI_FMT "%.4" PRIx16 ":%.2" PRIx8 ":%.2" PRIx8 ".%" PRIx8 +#define PCI_PRI_STR_SIZE sizeof("XXXX:XX:XX.X") /** Short formatting string, without domain, for PCI device: Ex: 00:01.0 */ #define PCI_SHORT_PRI_FMT "%.2" PRIx8 ":%.2" PRIx8 ".%" PRIx8 @@ -104,18 +108,6 @@ extern struct pci_device_list pci_device_list; /**< Global list of PCI devices. /** Nb. of values in PCI resource format. */ #define PCI_RESOURCE_FMT_NVAL 3 -/** IO resource type: memory address space */ -#define IORESOURCE_MEM 0x00000200 - -/** - * A structure describing a PCI resource. - */ -struct rte_pci_resource { - uint64_t phys_addr; /**< Physical address, 0 if no resource. */ - uint64_t len; /**< Length of the resource. */ - void *addr; /**< Virtual address, NULL when not mapped. */ -}; - /** Maximum number of PCI resources. */ #define PCI_MAX_RESOURCE 6 @@ -124,6 +116,7 @@ struct rte_pci_resource { * table of these IDs for each device that it supports. */ struct rte_pci_id { + uint32_t class_id; /**< Class ID (class, subclass, pi) or RTE_CLASS_ANY_ID. */ uint16_t vendor_id; /**< Vendor ID or PCI_ANY_ID. */ uint16_t device_id; /**< Device ID or PCI_ANY_ID. */ uint16_t subsystem_vendor_id; /**< Subsystem vendor ID or PCI_ANY_ID. */ @@ -142,11 +135,13 @@ struct rte_pci_addr { struct rte_devargs; -enum rte_pt_driver { - RTE_PT_UNKNOWN = 0, - RTE_PT_IGB_UIO = 1, - RTE_PT_VFIO = 2, - RTE_PT_UIO_GENERIC = 3, +enum rte_kernel_driver { + RTE_KDRV_UNKNOWN = 0, + RTE_KDRV_IGB_UIO, + RTE_KDRV_VFIO, + RTE_KDRV_UIO_GENERIC, + RTE_KDRV_NIC_UIO, + RTE_KDRV_NONE, }; /** @@ -154,23 +149,31 @@ enum rte_pt_driver { */ struct rte_pci_device { TAILQ_ENTRY(rte_pci_device) next; /**< Next probed PCI device. */ + struct rte_device device; /**< Inherit core device */ struct rte_pci_addr addr; /**< PCI location. */ struct rte_pci_id id; /**< PCI ID. */ - struct rte_pci_resource mem_resource[PCI_MAX_RESOURCE]; /**< PCI Memory Resource */ + struct rte_mem_resource mem_resource[PCI_MAX_RESOURCE]; + /**< PCI Memory Resource */ struct rte_intr_handle intr_handle; /**< Interrupt handle */ - const struct rte_pci_driver *driver; /**< Associated driver */ + struct rte_pci_driver *driver; /**< Associated driver */ uint16_t max_vfs; /**< sriov enable if not zero */ - int numa_node; /**< NUMA node connection */ - struct rte_devargs *devargs; /**< Device user arguments */ - enum rte_pt_driver pt_driver; /**< Driver of passthrough */ + enum rte_kernel_driver kdrv; /**< Kernel driver passthrough */ }; +/** + * @internal + * Helper macro for drivers that need to convert to struct rte_pci_device. + */ +#define RTE_DEV_TO_PCI(ptr) container_of(ptr, struct rte_pci_device, device) + /** Any PCI device identifier (vendor, device, ...) */ #define PCI_ANY_ID (0xffff) +#define RTE_CLASS_ANY_ID (0xffffff) #ifdef __cplusplus /** C++ macro used to help building up tables of device IDs */ #define RTE_PCI_DEVICE(vend, dev) \ + RTE_CLASS_ANY_ID, \ (vend), \ (dev), \ PCI_ANY_ID, \ @@ -178,6 +181,7 @@ struct rte_pci_device { #else /** Macro used to help building up tables of device IDs */ #define RTE_PCI_DEVICE(vend, dev) \ + .class_id = RTE_CLASS_ANY_ID, \ .vendor_id = (vend), \ .device_id = (dev), \ .subsystem_vendor_id = PCI_ANY_ID, \ @@ -189,35 +193,57 @@ struct rte_pci_driver; /** * Initialisation function for the driver called during PCI probing. */ -typedef int (pci_devinit_t)(struct rte_pci_driver *, struct rte_pci_device *); +typedef int (pci_probe_t)(struct rte_pci_driver *, struct rte_pci_device *); /** * Uninitialisation function for the driver called during hotplugging. */ -typedef int (pci_devuninit_t)(struct rte_pci_device *); +typedef int (pci_remove_t)(struct rte_pci_device *); /** * A structure describing a PCI driver. */ struct rte_pci_driver { TAILQ_ENTRY(rte_pci_driver) next; /**< Next in list. */ - const char *name; /**< Driver name. */ - pci_devinit_t *devinit; /**< Device init. function. */ - pci_devuninit_t *devuninit; /**< Device uninit function. */ - struct rte_pci_id *id_table; /**< ID table, NULL terminated. */ + struct rte_driver driver; /**< Inherit core driver. */ + pci_probe_t *probe; /**< Device Probe function. */ + pci_remove_t *remove; /**< Device Remove function. */ + const struct rte_pci_id *id_table; /**< ID table, NULL terminated. */ uint32_t drv_flags; /**< Flags contolling handling of device. */ }; /** Device needs PCI BAR mapping (done with either IGB_UIO or VFIO) */ #define RTE_PCI_DRV_NEED_MAPPING 0x0001 -/** Device driver must be registered several times until failure - deprecated */ -#pragma GCC poison RTE_PCI_DRV_MULTIPLE -/** Device needs to be unbound even if no module is provided */ -#define RTE_PCI_DRV_FORCE_UNBIND 0x0004 /** Device driver supports link state interrupt */ #define RTE_PCI_DRV_INTR_LSC 0x0008 -/** Device driver supports detaching capability */ -#define RTE_PCI_DRV_DETACHABLE 0x0010 + +/** + * A structure describing a PCI mapping. + */ +struct pci_map { + void *addr; + char *path; + uint64_t offset; + uint64_t size; + uint64_t phaddr; +}; + +/** + * A structure describing a mapped PCI resource. + * For multi-process we need to reproduce all PCI mappings in secondary + * processes, so save them in a tailq. + */ +struct mapped_pci_resource { + TAILQ_ENTRY(mapped_pci_resource) next; + + struct rte_pci_addr pci_addr; + char path[PATH_MAX]; + int nb_maps; + struct pci_map maps[PCI_MAX_RESOURCE]; +}; + +/** mapped pci device list */ +TAILQ_HEAD(mapped_pci_res_list, mapped_pci_resource); /**< Internal use only - Macro used by pci addr parsing functions **/ #define GET_PCIADDR_FIELD(in, fd, lim, dlm) \ @@ -227,7 +253,7 @@ do { \ errno = 0; \ val = strtoul((in), &end, 16); \ if (errno != 0 || end[0] != (dlm) || val > (lim)) \ - return (-EINVAL); \ + return -EINVAL; \ (fd) = (typeof (fd))val; \ (in) = end + 1; \ } while(0) @@ -238,10 +264,10 @@ do { \ * a domain prefix (i.e. domain returned is always 0) * * @param input - * The input string to be parsed. Should have the format XX:XX.X + * The input string to be parsed. Should have the format XX:XX.X * @param dev_addr - * The PCI Bus-Device-Function address to be returned. Domain will always be - * returned as 0 + * The PCI Bus-Device-Function address to be returned. Domain will always be + * returned as 0 * @return * 0 on success, negative on error. */ @@ -252,7 +278,7 @@ eal_parse_pci_BDF(const char *input, struct rte_pci_addr *dev_addr) GET_PCIADDR_FIELD(input, dev_addr->bus, UINT8_MAX, ':'); GET_PCIADDR_FIELD(input, dev_addr->devid, UINT8_MAX, '.'); GET_PCIADDR_FIELD(input, dev_addr->function, UINT8_MAX, 0); - return (0); + return 0; } /** @@ -261,9 +287,9 @@ eal_parse_pci_BDF(const char *input, struct rte_pci_addr *dev_addr) * a domain prefix. * * @param input - * The input string to be parsed. Should have the format XXXX:XX:XX.X + * The input string to be parsed. Should have the format XXXX:XX:XX.X * @param dev_addr - * The PCI Bus-Device-Function address to be returned + * The PCI Bus-Device-Function address to be returned * @return * 0 on success, negative on error. */ @@ -274,10 +300,32 @@ eal_parse_pci_DomBDF(const char *input, struct rte_pci_addr *dev_addr) GET_PCIADDR_FIELD(input, dev_addr->bus, UINT8_MAX, ':'); GET_PCIADDR_FIELD(input, dev_addr->devid, UINT8_MAX, '.'); GET_PCIADDR_FIELD(input, dev_addr->function, UINT8_MAX, 0); - return (0); + return 0; } #undef GET_PCIADDR_FIELD +/** + * Utility function to write a pci device name, this device name can later be + * used to retrieve the corresponding rte_pci_addr using eal_parse_pci_* + * BDF helpers. + * + * @param addr + * The PCI Bus-Device-Function address + * @param output + * The output buffer string + * @param size + * The output buffer size + */ +static inline void +rte_eal_pci_device_name(const struct rte_pci_addr *addr, + char *output, size_t size) +{ + RTE_VERIFY(size >= PCI_PRI_STR_SIZE); + RTE_VERIFY(snprintf(output, size, PCI_PRI_FMT, + addr->domain, addr->bus, + addr->devid, addr->function) >= 0); +} + /* Compare two PCI device addresses. */ /** * Utility function to compare two PCI device addresses. @@ -292,7 +340,8 @@ eal_parse_pci_DomBDF(const char *input, struct rte_pci_addr *dev_addr) * Negative on addr is less than addr2, or error. */ static inline int -rte_eal_compare_pci_addr(struct rte_pci_addr *addr, struct rte_pci_addr *addr2) +rte_eal_compare_pci_addr(const struct rte_pci_addr *addr, + const struct rte_pci_addr *addr2) { uint64_t dev_addr, dev_addr2; @@ -312,6 +361,15 @@ rte_eal_compare_pci_addr(struct rte_pci_addr *addr, struct rte_pci_addr *addr2) return 0; } +/** + * Scan the content of the PCI bus, and the devices in the devices + * list + * + * @return + * 0 on success, negative on error + */ +int rte_eal_pci_scan(void); + /** * Probe the PCI bus for registered drivers. * @@ -325,7 +383,64 @@ rte_eal_compare_pci_addr(struct rte_pci_addr *addr, struct rte_pci_addr *addr2) */ int rte_eal_pci_probe(void); -#ifdef RTE_LIBRTE_EAL_HOTPLUG +/** + * Map the PCI device resources in user space virtual memory address + * + * Note that driver should not call this function when flag + * RTE_PCI_DRV_NEED_MAPPING is set, as EAL will do that for + * you when it's on. + * + * @param dev + * A pointer to a rte_pci_device structure describing the device + * to use + * + * @return + * 0 on success, negative on error and positive if no driver + * is found for the device. + */ +int rte_eal_pci_map_device(struct rte_pci_device *dev); + +/** + * Unmap this device + * + * @param dev + * A pointer to a rte_pci_device structure describing the device + * to use + */ +void rte_eal_pci_unmap_device(struct rte_pci_device *dev); + +/** + * @internal + * Map a particular resource from a file. + * + * @param requested_addr + * The starting address for the new mapping range. + * @param fd + * The file descriptor. + * @param offset + * The offset for the mapping range. + * @param size + * The size for the mapping range. + * @param additional_flags + * The additional flags for the mapping range. + * @return + * - On success, the function returns a pointer to the mapped area. + * - On error, the value MAP_FAILED is returned. + */ +void *pci_map_resource(void *requested_addr, int fd, off_t offset, + size_t size, int additional_flags); + +/** + * @internal + * Unmap a particular resource. + * + * @param requested_addr + * The address for the unmapping range. + * @param size + * The size for the unmapping range. + */ +void pci_unmap_resource(void *requested_addr, size_t size); + /** * Probe the single PCI device. * @@ -339,13 +454,13 @@ int rte_eal_pci_probe(void); * - 0 on success. * - Negative on error. */ -int rte_eal_pci_probe_one(struct rte_pci_addr *addr); +int rte_eal_pci_probe_one(const struct rte_pci_addr *addr); /** * Close the single PCI device. * * Scan the content of the PCI bus, and find the pci device specified by pci - * address, then call the close() function for registered driver that has a + * address, then call the remove() function for registered driver that has a * matching entry in its id_table for discovered device. * * @param addr @@ -354,8 +469,7 @@ int rte_eal_pci_probe_one(struct rte_pci_addr *addr); * - 0 on success. * - Negative on error. */ -int rte_eal_pci_close_one(struct rte_pci_addr *addr); -#endif /* RTE_LIBRTE_EAL_HOTPLUG */ +int rte_eal_pci_detach(const struct rte_pci_addr *addr); /** * Dump the content of the PCI bus. @@ -374,6 +488,16 @@ void rte_eal_pci_dump(FILE *f); */ void rte_eal_pci_register(struct rte_pci_driver *driver); +/** Helper for PCI device registration from driver (eth, crypto) instance */ +#define RTE_PMD_REGISTER_PCI(nm, pci_drv) \ +RTE_INIT(pciinitfn_ ##nm); \ +static void pciinitfn_ ##nm(void) \ +{\ + (pci_drv).driver.name = RTE_STR(nm);\ + rte_eal_pci_register(&pci_drv); \ +} \ +RTE_PMD_EXPORT_NAME(nm, __COUNTER__) + /** * Unregister a PCI driver. * @@ -383,6 +507,107 @@ void rte_eal_pci_register(struct rte_pci_driver *driver); */ void rte_eal_pci_unregister(struct rte_pci_driver *driver); +/** + * Read PCI config space. + * + * @param device + * A pointer to a rte_pci_device structure describing the device + * to use + * @param buf + * A data buffer where the bytes should be read into + * @param len + * The length of the data buffer. + * @param offset + * The offset into PCI config space + */ +int rte_eal_pci_read_config(const struct rte_pci_device *device, + void *buf, size_t len, off_t offset); + +/** + * Write PCI config space. + * + * @param device + * A pointer to a rte_pci_device structure describing the device + * to use + * @param buf + * A data buffer containing the bytes should be written + * @param len + * The length of the data buffer. + * @param offset + * The offset into PCI config space + */ +int rte_eal_pci_write_config(const struct rte_pci_device *device, + const void *buf, size_t len, off_t offset); + +/** + * A structure used to access io resources for a pci device. + * rte_pci_ioport is arch, os, driver specific, and should not be used outside + * of pci ioport api. + */ +struct rte_pci_ioport { + struct rte_pci_device *dev; + uint64_t base; + uint64_t len; /* only filled for memory mapped ports */ +}; + +/** + * Initialize a rte_pci_ioport object for a pci device io resource. + * + * This object is then used to gain access to those io resources (see below). + * + * @param dev + * A pointer to a rte_pci_device structure describing the device + * to use. + * @param bar + * Index of the io pci resource we want to access. + * @param p + * The rte_pci_ioport object to be initialized. + * @return + * 0 on success, negative on error. + */ +int rte_eal_pci_ioport_map(struct rte_pci_device *dev, int bar, + struct rte_pci_ioport *p); + +/** + * Release any resources used in a rte_pci_ioport object. + * + * @param p + * The rte_pci_ioport object to be uninitialized. + * @return + * 0 on success, negative on error. + */ +int rte_eal_pci_ioport_unmap(struct rte_pci_ioport *p); + +/** + * Read from a io pci resource. + * + * @param p + * The rte_pci_ioport object from which we want to read. + * @param data + * A data buffer where the bytes should be read into + * @param len + * The length of the data buffer. + * @param offset + * The offset into the pci io resource. + */ +void rte_eal_pci_ioport_read(struct rte_pci_ioport *p, + void *data, size_t len, off_t offset); + +/** + * Write to a io pci resource. + * + * @param p + * The rte_pci_ioport object to which we want to write. + * @param data + * A data buffer where the bytes should be read into + * @param len + * The length of the data buffer. + * @param offset + * The offset into the pci io resource. + */ +void rte_eal_pci_ioport_write(struct rte_pci_ioport *p, + const void *data, size_t len, off_t offset); + #ifdef __cplusplus } #endif