ceph/src/spdk/dpdk/drivers/bus/ifpga/rte_bus_ifpga.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2018 Intel Corporation
   3  */
   4
   5 #ifndef _RTE_BUS_IFPGA_H_
   6 #define _RTE_BUS_IFPGA_H_
   7
   8 /**
   9  * @file
  10  *
  11  * RTE Intel FPGA Bus Interface
  12  */
  13
  14 #ifdef __cplusplus
  15 extern "C" {
  16 #endif /* __cplusplus */
  17
  18 #include <rte_bus.h>
  19 #include <rte_pci.h>
  20 #include <rte_spinlock.h>
  21
  22 /** Name of Intel FPGA Bus */
  23 #define IFPGA_BUS_NAME ifpga
  24
  25 /* Forward declarations */
  26 struct rte_afu_device;
  27 struct rte_afu_driver;
  28
  29 /** Double linked list of Intel FPGA AFU device. */
  30 TAILQ_HEAD(ifpga_afu_dev_list, rte_afu_device);
  31 /** Double linked list of Intel FPGA AFU device drivers. */
  32 TAILQ_HEAD(ifpga_afu_drv_list, rte_afu_driver);
  33
  34 #define IFPGA_BUS_BITSTREAM_PATH_MAX_LEN 256
  35
  36 struct rte_afu_uuid {
  37         uint64_t uuid_low;
  38         uint64_t uuid_high;
  39 } __attribute__ ((packed));
  40
  41 #define IFPGA_BUS_DEV_PORT_MAX 4
  42
  43 /**
  44  * A structure describing an ID for a AFU driver. Each driver provides a
  45  * table of these IDs for each device that it supports.
  46  */
  47 struct rte_afu_id {
  48         struct rte_afu_uuid uuid;
  49         int      port; /**< port number */
  50 } __attribute__ ((packed));
  51
  52 /**
  53  * A structure PR (Partial Reconfiguration) configuration AFU driver.
  54  */
  55
  56 struct rte_afu_pr_conf {
  57         struct rte_afu_id afu_id;
  58         int pr_enable;
  59         char bs_path[IFPGA_BUS_BITSTREAM_PATH_MAX_LEN];
  60 };
  61
  62 #define AFU_PRI_STR_SIZE (PCI_PRI_STR_SIZE + 8)
  63
  64 struct rte_afu_shared {
  65         rte_spinlock_t lock;
  66         void *data;
  67 };
  68
  69 /**
  70  * A structure describing a AFU device.
  71  */
  72 struct rte_afu_device {
  73         TAILQ_ENTRY(rte_afu_device) next;       /**< Next in device list. */
  74         struct rte_device device;               /**< Inherit core device */
  75         struct rte_rawdev *rawdev;    /**< Point Rawdev */
  76         struct rte_afu_id id;                   /**< AFU id within FPGA. */
  77         uint32_t num_region;   /**< number of regions found */
  78         struct rte_mem_resource mem_resource[PCI_MAX_RESOURCE];
  79                                                 /**< AFU Memory Resource */
  80         struct rte_afu_shared shared;
  81         struct rte_intr_handle intr_handle;     /**< Interrupt handle */
  82         struct rte_afu_driver *driver;          /**< Associated driver */
  83         char path[IFPGA_BUS_BITSTREAM_PATH_MAX_LEN];
  84 } __attribute__ ((packed));
  85
  86 /**
  87  * @internal
  88  * Helper macro for drivers that need to convert to struct rte_afu_device.
  89  */
  90 #define RTE_DEV_TO_AFU(ptr) \
  91         container_of(ptr, struct rte_afu_device, device)
  92
  93 /**
  94  * Initialization function for the driver called during FPGA BUS probing.
  95  */
  96 typedef int (afu_probe_t)(struct rte_afu_device *);
  97
  98 /**
  99  * Uninitialization function for the driver called during hotplugging.
 100  */
 101 typedef int (afu_remove_t)(struct rte_afu_device *);
 102
 103 /**
 104  * A structure describing a AFU device.
 105  */
 106 struct rte_afu_driver {
 107         TAILQ_ENTRY(rte_afu_driver) next;       /**< Next afu driver. */
 108         struct rte_driver driver;               /**< Inherit core driver. */
 109         afu_probe_t *probe;                     /**< Device Probe function. */
 110         afu_remove_t *remove;                   /**< Device Remove function. */
 111         const struct rte_afu_uuid *id_table;    /**< AFU uuid within FPGA. */
 112 };
 113
 114 static inline const char *
 115 rte_ifpga_device_name(const struct rte_afu_device *afu)
 116 {
 117         if (afu && afu->device.name)
 118                 return afu->device.name;
 119         return NULL;
 120 }
 121
 122 /**
 123  * Find AFU by AFU name.
 124  *
 125  * @param name
 126  *   A pointer to AFU name string.
 127  */
 128 struct rte_afu_device *
 129 rte_ifpga_find_afu_by_name(const char *name);
 130
 131 /**
 132  * Register a ifpga afu device driver.
 133  *
 134  * @param driver
 135  *   A pointer to a rte_afu_driver structure describing the driver
 136  *   to be registered.
 137  */
 138 void rte_ifpga_driver_register(struct rte_afu_driver *driver);
 139
 140 /**
 141  * Unregister a ifpga afu device driver.
 142  *
 143  * @param driver
 144  *   A pointer to a rte_afu_driver structure describing the driver
 145  *   to be unregistered.
 146  */
 147 void rte_ifpga_driver_unregister(struct rte_afu_driver *driver);
 148
 149 #define RTE_PMD_REGISTER_AFU(nm, afudrv)\
 150 static const char *afudrvinit_ ## nm ## _alias;\
 151 RTE_INIT(afudrvinitfn_ ##afudrv)\
 152 {\
 153         (afudrv).driver.name = RTE_STR(nm);\
 154         (afudrv).driver.alias = afudrvinit_ ## nm ## _alias;\
 155         rte_ifpga_driver_register(&afudrv);\
 156 } \
 157 RTE_PMD_EXPORT_NAME(nm, __COUNTER__)
 158
 159 #define RTE_PMD_REGISTER_AFU_ALIAS(nm, alias)\
 160 static const char *afudrvinit_ ## nm ## _alias = RTE_STR(alias)
 161
 162 #ifdef __cplusplus
 163 }
 164 #endif /* __cplusplus */
 165
 166 #endif /* _RTE_BUS_IFPGA_H_ */