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 .schedule_evict_and_restore_process = 47 kgd2kfd_schedule_evict_and_restore_process, 48 }; 49 50 int sched_policy = KFD_SCHED_POLICY_HWS; 51 module_param(sched_policy, int, 0444); 52 MODULE_PARM_DESC(sched_policy, 53 "Scheduling policy (0 = HWS (Default), 1 = HWS without over-subscription, 2 = Non-HWS (Used for debugging only)"); 54 55 int hws_max_conc_proc = 8; 56 module_param(hws_max_conc_proc, int, 0444); 57 MODULE_PARM_DESC(hws_max_conc_proc, 58 "Max # processes HWS can execute concurrently when sched_policy=0 (0 = no concurrency, #VMIDs for KFD = Maximum(default))"); 59 60 int cwsr_enable = 1; 61 module_param(cwsr_enable, int, 0444); 62 MODULE_PARM_DESC(cwsr_enable, "CWSR enable (0 = Off, 1 = On (Default))"); 63 64 int max_num_of_queues_per_device = KFD_MAX_NUM_OF_QUEUES_PER_DEVICE_DEFAULT; 65 module_param(max_num_of_queues_per_device, int, 0444); 66 MODULE_PARM_DESC(max_num_of_queues_per_device, 67 "Maximum number of supported queues per device (1 = Minimum, 4096 = default)"); 68 69 int send_sigterm; 70 module_param(send_sigterm, int, 0444); 71 MODULE_PARM_DESC(send_sigterm, 72 "Send sigterm to HSA process on unhandled exception (0 = disable, 1 = enable)"); 73 74 int ignore_crat; 75 module_param(ignore_crat, int, 0444); 76 MODULE_PARM_DESC(ignore_crat, 77 "Ignore CRAT table during KFD initialization (0 = use CRAT (default), 1 = ignore CRAT)"); 78 79 static int amdkfd_init_completed; 80 81 int kgd2kfd_init(unsigned int interface_version, 82 const struct kgd2kfd_calls **g2f) 83 { 84 if (!amdkfd_init_completed) 85 return -EPROBE_DEFER; 86 87 /* 88 * Only one interface version is supported, 89 * no kfd/kgd version skew allowed. 90 */ 91 if (interface_version != KFD_INTERFACE_VERSION) 92 return -EINVAL; 93 94 *g2f = &kgd2kfd; 95 96 return 0; 97 } 98 EXPORT_SYMBOL(kgd2kfd_init); 99 100 void kgd2kfd_exit(void) 101 { 102 } 103 104 static int __init kfd_module_init(void) 105 { 106 int err; 107 108 /* Verify module parameters */ 109 if ((sched_policy < KFD_SCHED_POLICY_HWS) || 110 (sched_policy > KFD_SCHED_POLICY_NO_HWS)) { 111 pr_err("sched_policy has invalid value\n"); 112 return -1; 113 } 114 115 /* Verify module parameters */ 116 if ((max_num_of_queues_per_device < 1) || 117 (max_num_of_queues_per_device > 118 KFD_MAX_NUM_OF_QUEUES_PER_DEVICE)) { 119 pr_err("max_num_of_queues_per_device must be between 1 to KFD_MAX_NUM_OF_QUEUES_PER_DEVICE\n"); 120 return -1; 121 } 122 123 err = kfd_chardev_init(); 124 if (err < 0) 125 goto err_ioctl; 126 127 err = kfd_topology_init(); 128 if (err < 0) 129 goto err_topology; 130 131 kfd_process_create_wq(); 132 133 kfd_debugfs_init(); 134 135 amdkfd_init_completed = 1; 136 137 dev_info(kfd_device, "Initialized module\n"); 138 139 return 0; 140 141 err_topology: 142 kfd_chardev_exit(); 143 err_ioctl: 144 return err; 145 } 146 147 static void __exit kfd_module_exit(void) 148 { 149 amdkfd_init_completed = 0; 150 151 kfd_debugfs_fini(); 152 kfd_process_destroy_wq(); 153 kfd_topology_shutdown(); 154 kfd_chardev_exit(); 155 pr_info("amdkfd: Removed module\n"); 156 } 157 158 module_init(kfd_module_init); 159 module_exit(kfd_module_exit); 160 161 MODULE_AUTHOR(KFD_DRIVER_AUTHOR); 162 MODULE_DESCRIPTION(KFD_DRIVER_DESC); 163 MODULE_LICENSE("GPL and additional rights"); 164 MODULE_VERSION(__stringify(KFD_DRIVER_MAJOR) "." 165 __stringify(KFD_DRIVER_MINOR) "." 166 __stringify(KFD_DRIVER_PATCHLEVEL)); 167