drivers/gpu/drm/amd/amdkfd/kfd_module.c

   1 /*
   2  * Copyright 2014 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  */
  22
  23 #include <linux/module.h>
  24 #include <linux/sched.h>
  25 #include <linux/moduleparam.h>
  26 #include <linux/device.h>
  27 #include "kfd_priv.h"
  28
  29 #define KFD_DRIVER_AUTHOR       "AMD Inc. and others"
  30
  31 #define KFD_DRIVER_DESC         "Standalone HSA driver for AMD's GPUs"
  32 #define KFD_DRIVER_DATE         "20150421"
  33 #define KFD_DRIVER_MAJOR        0
  34 #define KFD_DRIVER_MINOR        7
  35 #define KFD_DRIVER_PATCHLEVEL   2
  36
  37 static const struct kgd2kfd_calls kgd2kfd = {
  38         .exit           = kgd2kfd_exit,
  39         .probe          = kgd2kfd_probe,
  40         .device_init    = kgd2kfd_device_init,
  41         .device_exit    = kgd2kfd_device_exit,
  42         .interrupt      = kgd2kfd_interrupt,
  43         .suspend        = kgd2kfd_suspend,
  44         .resume         = kgd2kfd_resume,
  45 };
  46
  47 int sched_policy = KFD_SCHED_POLICY_HWS;
  48 module_param(sched_policy, int, 0444);
  49 MODULE_PARM_DESC(sched_policy,
  50         "Scheduling policy (0 = HWS (Default), 1 = HWS without over-subscription, 2 = Non-HWS (Used for debugging only)");
  51
  52 int max_num_of_queues_per_device = KFD_MAX_NUM_OF_QUEUES_PER_DEVICE_DEFAULT;
  53 module_param(max_num_of_queues_per_device, int, 0444);
  54 MODULE_PARM_DESC(max_num_of_queues_per_device,
  55         "Maximum number of supported queues per device (1 = Minimum, 4096 = default)");
  56
  57 int send_sigterm;
  58 module_param(send_sigterm, int, 0444);
  59 MODULE_PARM_DESC(send_sigterm,
  60         "Send sigterm to HSA process on unhandled exception (0 = disable, 1 = enable)");
  61
  62 static int amdkfd_init_completed;
  63
  64 int kgd2kfd_init(unsigned interface_version, const struct kgd2kfd_calls **g2f)
  65 {
  66         if (!amdkfd_init_completed)
  67                 return -EPROBE_DEFER;
  68
  69         /*
  70          * Only one interface version is supported,
  71          * no kfd/kgd version skew allowed.
  72          */
  73         if (interface_version != KFD_INTERFACE_VERSION)
  74                 return -EINVAL;
  75
  76         *g2f = &kgd2kfd;
  77
  78         return 0;
  79 }
  80 EXPORT_SYMBOL(kgd2kfd_init);
  81
  82 void kgd2kfd_exit(void)
  83 {
  84 }
  85
  86 static int __init kfd_module_init(void)
  87 {
  88         int err;
  89
  90         /* Verify module parameters */
  91         if ((sched_policy < KFD_SCHED_POLICY_HWS) ||
  92                 (sched_policy > KFD_SCHED_POLICY_NO_HWS)) {
  93                 pr_err("kfd: sched_policy has invalid value\n");
  94                 return -1;
  95         }
  96
  97         /* Verify module parameters */
  98         if ((max_num_of_queues_per_device < 1) ||
  99                 (max_num_of_queues_per_device >
 100                         KFD_MAX_NUM_OF_QUEUES_PER_DEVICE)) {
 101                 pr_err("kfd: max_num_of_queues_per_device must be between 1 to KFD_MAX_NUM_OF_QUEUES_PER_DEVICE\n");
 102                 return -1;
 103         }
 104
 105         err = kfd_pasid_init();
 106         if (err < 0)
 107                 goto err_pasid;
 108
 109         err = kfd_chardev_init();
 110         if (err < 0)
 111                 goto err_ioctl;
 112
 113         err = kfd_topology_init();
 114         if (err < 0)
 115                 goto err_topology;
 116
 117         kfd_process_create_wq();
 118
 119         amdkfd_init_completed = 1;
 120
 121         dev_info(kfd_device, "Initialized module\n");
 122
 123         return 0;
 124
 125 err_topology:
 126         kfd_chardev_exit();
 127 err_ioctl:
 128         kfd_pasid_exit();
 129 err_pasid:
 130         return err;
 131 }
 132
 133 static void __exit kfd_module_exit(void)
 134 {
 135         amdkfd_init_completed = 0;
 136
 137         kfd_process_destroy_wq();
 138         kfd_topology_shutdown();
 139         kfd_chardev_exit();
 140         kfd_pasid_exit();
 141         dev_info(kfd_device, "Removed module\n");
 142 }
 143
 144 module_init(kfd_module_init);
 145 module_exit(kfd_module_exit);
 146
 147 MODULE_AUTHOR(KFD_DRIVER_AUTHOR);
 148 MODULE_DESCRIPTION(KFD_DRIVER_DESC);
 149 MODULE_LICENSE("GPL and additional rights");
 150 MODULE_VERSION(__stringify(KFD_DRIVER_MAJOR) "."
 151                __stringify(KFD_DRIVER_MINOR) "."
 152                __stringify(KFD_DRIVER_PATCHLEVEL));