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 hws_max_conc_proc = 8; 54 module_param(hws_max_conc_proc, int, 0444); 55 MODULE_PARM_DESC(hws_max_conc_proc, 56 "Max # processes HWS can execute concurrently when sched_policy=0 (0 = no concurrency, #VMIDs for KFD = Maximum(default))"); 57 58 int cwsr_enable = 1; 59 module_param(cwsr_enable, int, 0444); 60 MODULE_PARM_DESC(cwsr_enable, "CWSR enable (0 = Off, 1 = On (Default))"); 61 62 int max_num_of_queues_per_device = KFD_MAX_NUM_OF_QUEUES_PER_DEVICE_DEFAULT; 63 module_param(max_num_of_queues_per_device, int, 0444); 64 MODULE_PARM_DESC(max_num_of_queues_per_device, 65 "Maximum number of supported queues per device (1 = Minimum, 4096 = default)"); 66 67 int send_sigterm; 68 module_param(send_sigterm, int, 0444); 69 MODULE_PARM_DESC(send_sigterm, 70 "Send sigterm to HSA process on unhandled exception (0 = disable, 1 = enable)"); 71 72 int ignore_crat; 73 module_param(ignore_crat, int, 0444); 74 MODULE_PARM_DESC(ignore_crat, 75 "Ignore CRAT table during KFD initialization (0 = use CRAT (default), 1 = ignore CRAT)"); 76 77 static int amdkfd_init_completed; 78 79 int kgd2kfd_init(unsigned int interface_version, 80 const struct kgd2kfd_calls **g2f) 81 { 82 if (!amdkfd_init_completed) 83 return -EPROBE_DEFER; 84 85 /* 86 * Only one interface version is supported, 87 * no kfd/kgd version skew allowed. 88 */ 89 if (interface_version != KFD_INTERFACE_VERSION) 90 return -EINVAL; 91 92 *g2f = &kgd2kfd; 93 94 return 0; 95 } 96 EXPORT_SYMBOL(kgd2kfd_init); 97 98 void kgd2kfd_exit(void) 99 { 100 } 101 102 static int __init kfd_module_init(void) 103 { 104 int err; 105 106 /* Verify module parameters */ 107 if ((sched_policy < KFD_SCHED_POLICY_HWS) || 108 (sched_policy > KFD_SCHED_POLICY_NO_HWS)) { 109 pr_err("sched_policy has invalid value\n"); 110 return -1; 111 } 112 113 /* Verify module parameters */ 114 if ((max_num_of_queues_per_device < 1) || 115 (max_num_of_queues_per_device > 116 KFD_MAX_NUM_OF_QUEUES_PER_DEVICE)) { 117 pr_err("max_num_of_queues_per_device must be between 1 to KFD_MAX_NUM_OF_QUEUES_PER_DEVICE\n"); 118 return -1; 119 } 120 121 err = kfd_chardev_init(); 122 if (err < 0) 123 goto err_ioctl; 124 125 err = kfd_topology_init(); 126 if (err < 0) 127 goto err_topology; 128 129 kfd_process_create_wq(); 130 131 kfd_debugfs_init(); 132 133 amdkfd_init_completed = 1; 134 135 dev_info(kfd_device, "Initialized module\n"); 136 137 return 0; 138 139 err_topology: 140 kfd_chardev_exit(); 141 err_ioctl: 142 return err; 143 } 144 145 static void __exit kfd_module_exit(void) 146 { 147 amdkfd_init_completed = 0; 148 149 kfd_debugfs_fini(); 150 kfd_process_destroy_wq(); 151 kfd_topology_shutdown(); 152 kfd_chardev_exit(); 153 pr_info("amdkfd: Removed module\n"); 154 } 155 156 module_init(kfd_module_init); 157 module_exit(kfd_module_exit); 158 159 MODULE_AUTHOR(KFD_DRIVER_AUTHOR); 160 MODULE_DESCRIPTION(KFD_DRIVER_DESC); 161 MODULE_LICENSE("GPL and additional rights"); 162 MODULE_VERSION(__stringify(KFD_DRIVER_MAJOR) "." 163 __stringify(KFD_DRIVER_MINOR) "." 164 __stringify(KFD_DRIVER_PATCHLEVEL)); 165