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)); 153