ceph/src/dpdk/lib/librte_eal/common/include/rte_devargs.h

   1 /*-
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   4  *   Copyright 2014 6WIND S.A.
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  32
  33 #ifndef _RTE_DEVARGS_H_
  34 #define _RTE_DEVARGS_H_
  35
  36 /**
  37  * @file
  38  *
  39  * RTE devargs: list of devices and their user arguments
  40  *
  41  * This file stores a list of devices and their arguments given by
  42  * the user when a DPDK application is started. These devices can be PCI
  43  * devices or virtual devices. These devices are stored at startup in a
  44  * list of rte_devargs structures.
  45  */
  46
  47 #ifdef __cplusplus
  48 extern "C" {
  49 #endif
  50
  51 #include <stdio.h>
  52 #include <sys/queue.h>
  53 #include <rte_pci.h>
  54
  55 /**
  56  * Type of generic device
  57  */
  58 enum rte_devtype {
  59         RTE_DEVTYPE_WHITELISTED_PCI,
  60         RTE_DEVTYPE_BLACKLISTED_PCI,
  61         RTE_DEVTYPE_VIRTUAL,
  62 };
  63
  64 /**
  65  * Structure that stores a device given by the user with its arguments
  66  *
  67  * A user device is a physical or a virtual device given by the user to
  68  * the DPDK application at startup through command line arguments.
  69  *
  70  * The structure stores the configuration of the device, its PCI
  71  * identifier if it's a PCI device or the driver name if it's a virtual
  72  * device.
  73  */
  74 struct rte_devargs {
  75         /** Next in list. */
  76         TAILQ_ENTRY(rte_devargs) next;
  77         /** Type of device. */
  78         enum rte_devtype type;
  79         RTE_STD_C11
  80         union {
  81                 /** Used if type is RTE_DEVTYPE_*_PCI. */
  82                 struct {
  83                         /** PCI location. */
  84                         struct rte_pci_addr addr;
  85                 } pci;
  86                 /** Used if type is RTE_DEVTYPE_VIRTUAL. */
  87                 struct {
  88                         /** Driver name. */
  89                         char drv_name[32];
  90                 } virt;
  91         };
  92         /** Arguments string as given by user or "" for no argument. */
  93         char *args;
  94 };
  95
  96 /** user device double-linked queue type definition */
  97 TAILQ_HEAD(rte_devargs_list, rte_devargs);
  98
  99 /** Global list of user devices */
 100 extern struct rte_devargs_list devargs_list;
 101
 102 /**
 103  * Parse a devargs string.
 104  *
 105  * For PCI devices, the format of arguments string is "PCI_ADDR" or
 106  * "PCI_ADDR,key=val,key2=val2,...". Examples: "08:00.1", "0000:5:00.0",
 107  * "04:00.0,arg=val".
 108  *
 109  * For virtual devices, the format of arguments string is "DRIVER_NAME*"
 110  * or "DRIVER_NAME*,key=val,key2=val2,...". Examples: "net_ring",
 111  * "net_ring0", "net_pmdAnything,arg=0:arg2=1".
 112  *
 113  * The function parses the arguments string to get driver name and driver
 114  * arguments.
 115  *
 116  * @param devargs_str
 117  *   The arguments as given by the user.
 118  * @param drvname
 119  *   The pointer to the string to store parsed driver name.
 120  * @param drvargs
 121  *   The pointer to the string to store parsed driver arguments.
 122  *
 123  * @return
 124  *   - 0 on success
 125  *   - A negative value on error
 126  */
 127 int rte_eal_parse_devargs_str(const char *devargs_str,
 128                                 char **drvname, char **drvargs);
 129
 130 /**
 131  * Add a device to the user device list
 132  *
 133  * For PCI devices, the format of arguments string is "PCI_ADDR" or
 134  * "PCI_ADDR,key=val,key2=val2,...". Examples: "08:00.1", "0000:5:00.0",
 135  * "04:00.0,arg=val".
 136  *
 137  * For virtual devices, the format of arguments string is "DRIVER_NAME*"
 138  * or "DRIVER_NAME*,key=val,key2=val2,...". Examples: "net_ring",
 139  * "net_ring0", "net_pmdAnything,arg=0:arg2=1". The validity of the
 140  * driver name is not checked by this function, it is done when probing
 141  * the drivers.
 142  *
 143  * @param devtype
 144  *   The type of the device.
 145  * @param devargs_str
 146  *   The arguments as given by the user.
 147  *
 148  * @return
 149  *   - 0 on success
 150  *   - A negative value on error
 151  */
 152 int rte_eal_devargs_add(enum rte_devtype devtype, const char *devargs_str);
 153
 154 /**
 155  * Count the number of user devices of a specified type
 156  *
 157  * @param devtype
 158  *   The type of the devices to counted.
 159  *
 160  * @return
 161  *   The number of devices.
 162  */
 163 unsigned int
 164 rte_eal_devargs_type_count(enum rte_devtype devtype);
 165
 166 /**
 167  * This function dumps the list of user device and their arguments.
 168  *
 169  * @param f
 170  *   A pointer to a file for output
 171  */
 172 void rte_eal_devargs_dump(FILE *f);
 173
 174 #ifdef __cplusplus
 175 }
 176 #endif
 177
 178 #endif /* _RTE_DEVARGS_H_ */