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 bool kgd2kfd_init(unsigned interface_version, const struct kgd2kfd_calls **g2f) 63 { 64 /* 65 * Only one interface version is supported, 66 * no kfd/kgd version skew allowed. 67 */ 68 if (interface_version != KFD_INTERFACE_VERSION) 69 return false; 70 71 *g2f = &kgd2kfd; 72 73 return true; 74 } 75 EXPORT_SYMBOL(kgd2kfd_init); 76 77 void kgd2kfd_exit(void) 78 { 79 } 80 81 static int __init kfd_module_init(void) 82 { 83 int err; 84 85 /* Verify module parameters */ 86 if ((sched_policy < KFD_SCHED_POLICY_HWS) || 87 (sched_policy > KFD_SCHED_POLICY_NO_HWS)) { 88 pr_err("kfd: sched_policy has invalid value\n"); 89 return -1; 90 } 91 92 /* Verify module parameters */ 93 if ((max_num_of_queues_per_device < 1) || 94 (max_num_of_queues_per_device > 95 KFD_MAX_NUM_OF_QUEUES_PER_DEVICE)) { 96 pr_err("kfd: max_num_of_queues_per_device must be between 1 to KFD_MAX_NUM_OF_QUEUES_PER_DEVICE\n"); 97 return -1; 98 } 99 100 err = kfd_pasid_init(); 101 if (err < 0) 102 goto err_pasid; 103 104 err = kfd_chardev_init(); 105 if (err < 0) 106 goto err_ioctl; 107 108 err = kfd_topology_init(); 109 if (err < 0) 110 goto err_topology; 111 112 kfd_process_create_wq(); 113 114 dev_info(kfd_device, "Initialized module\n"); 115 116 return 0; 117 118 err_topology: 119 kfd_chardev_exit(); 120 err_ioctl: 121 kfd_pasid_exit(); 122 err_pasid: 123 return err; 124 } 125 126 static void __exit kfd_module_exit(void) 127 { 128 kfd_process_destroy_wq(); 129 kfd_topology_shutdown(); 130 kfd_chardev_exit(); 131 kfd_pasid_exit(); 132 dev_info(kfd_device, "Removed module\n"); 133 } 134 135 module_init(kfd_module_init); 136 module_exit(kfd_module_exit); 137 138 MODULE_AUTHOR(KFD_DRIVER_AUTHOR); 139 MODULE_DESCRIPTION(KFD_DRIVER_DESC); 140 MODULE_LICENSE("GPL and additional rights"); 141 MODULE_VERSION(__stringify(KFD_DRIVER_MAJOR) "." 142 __stringify(KFD_DRIVER_MINOR) "." 143 __stringify(KFD_DRIVER_PATCHLEVEL)); 144