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 <linux/printk.h>
  28 #include "kfd_priv.h"
  29
  30 #define KFD_DRIVER_AUTHOR       "AMD Inc. and others"
  31
  32 #define KFD_DRIVER_DESC         "Standalone HSA driver for AMD's GPUs"
  33 #define KFD_DRIVER_DATE         "20150421"
  34 #define KFD_DRIVER_MAJOR        0
  35 #define KFD_DRIVER_MINOR        7
  36 #define KFD_DRIVER_PATCHLEVEL   2
  37
  38 static const struct kgd2kfd_calls kgd2kfd = {
  39         .exit           = kgd2kfd_exit,
  40         .probe          = kgd2kfd_probe,
  41         .device_init    = kgd2kfd_device_init,
  42         .device_exit    = kgd2kfd_device_exit,
  43         .interrupt      = kgd2kfd_interrupt,
  44         .suspend        = kgd2kfd_suspend,
  45         .resume         = kgd2kfd_resume,
  46 };
  47
  48 int sched_policy = KFD_SCHED_POLICY_HWS;
  49 module_param(sched_policy, int, 0444);
  50 MODULE_PARM_DESC(sched_policy,
  51         "Scheduling policy (0 = HWS (Default), 1 = HWS without over-subscription, 2 = Non-HWS (Used for debugging only)");
  52
  53 int max_num_of_queues_per_device = KFD_MAX_NUM_OF_QUEUES_PER_DEVICE_DEFAULT;
  54 module_param(max_num_of_queues_per_device, int, 0444);
  55 MODULE_PARM_DESC(max_num_of_queues_per_device,
  56         "Maximum number of supported queues per device (1 = Minimum, 4096 = default)");
  57
  58 int send_sigterm;
  59 module_param(send_sigterm, int, 0444);
  60 MODULE_PARM_DESC(send_sigterm,
  61         "Send sigterm to HSA process on unhandled exception (0 = disable, 1 = enable)");
  62
  63 static int amdkfd_init_completed;
  64
  65 int kgd2kfd_init(unsigned int interface_version,
  66                 const struct kgd2kfd_calls **g2f)
  67 {
  68         if (!amdkfd_init_completed)
  69                 return -EPROBE_DEFER;
  70
  71         /*
  72          * Only one interface version is supported,
  73          * no kfd/kgd version skew allowed.
  74          */
  75         if (interface_version != KFD_INTERFACE_VERSION)
  76                 return -EINVAL;
  77
  78         *g2f = &kgd2kfd;
  79
  80         return 0;
  81 }
  82 EXPORT_SYMBOL(kgd2kfd_init);
  83
  84 void kgd2kfd_exit(void)
  85 {
  86 }
  87
  88 static int __init kfd_module_init(void)
  89 {
  90         int err;
  91
  92         /* Verify module parameters */
  93         if ((sched_policy < KFD_SCHED_POLICY_HWS) ||
  94                 (sched_policy > KFD_SCHED_POLICY_NO_HWS)) {
  95                 pr_err("sched_policy has invalid value\n");
  96                 return -1;
  97         }
  98
  99         /* Verify module parameters */
 100         if ((max_num_of_queues_per_device < 1) ||
 101                 (max_num_of_queues_per_device >
 102                         KFD_MAX_NUM_OF_QUEUES_PER_DEVICE)) {
 103                 pr_err("max_num_of_queues_per_device must be between 1 to KFD_MAX_NUM_OF_QUEUES_PER_DEVICE\n");
 104                 return -1;
 105         }
 106
 107         err = kfd_chardev_init();
 108         if (err < 0)
 109                 goto err_ioctl;
 110
 111         err = kfd_topology_init();
 112         if (err < 0)
 113                 goto err_topology;
 114
 115         kfd_process_create_wq();
 116
 117         amdkfd_init_completed = 1;
 118
 119         dev_info(kfd_device, "Initialized module\n");
 120
 121         return 0;
 122
 123 err_topology:
 124         kfd_chardev_exit();
 125 err_ioctl:
 126         return err;
 127 }
 128
 129 static void __exit kfd_module_exit(void)
 130 {
 131         amdkfd_init_completed = 0;
 132
 133         kfd_process_destroy_wq();
 134         kfd_topology_shutdown();
 135         kfd_chardev_exit();
 136         pr_info("amdkfd: Removed module\n");
 137 }
 138
 139 module_init(kfd_module_init);
 140 module_exit(kfd_module_exit);
 141
 142 MODULE_AUTHOR(KFD_DRIVER_AUTHOR);
 143 MODULE_DESCRIPTION(KFD_DRIVER_DESC);
 144 MODULE_LICENSE("GPL and additional rights");
 145 MODULE_VERSION(__stringify(KFD_DRIVER_MAJOR) "."
 146                __stringify(KFD_DRIVER_MINOR) "."
 147                __stringify(KFD_DRIVER_PATCHLEVEL));