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 "20150122" 33 #define KFD_DRIVER_MAJOR 0 34 #define KFD_DRIVER_MINOR 7 35 #define KFD_DRIVER_PATCHLEVEL 1 36 37 const struct kfd2kgd_calls *kfd2kgd; 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 bool kgd2kfd_init(unsigned interface_version, 59 const struct kfd2kgd_calls *f2g, 60 const struct kgd2kfd_calls **g2f) 61 { 62 /* 63 * Only one interface version is supported, 64 * no kfd/kgd version skew allowed. 65 */ 66 if (interface_version != KFD_INTERFACE_VERSION) 67 return false; 68 69 /* Protection against multiple amd kgd loads */ 70 if (kfd2kgd) 71 return true; 72 73 kfd2kgd = f2g; 74 *g2f = &kgd2kfd; 75 76 return true; 77 } 78 EXPORT_SYMBOL(kgd2kfd_init); 79 80 void kgd2kfd_exit(void) 81 { 82 } 83 84 static int __init kfd_module_init(void) 85 { 86 int err; 87 88 kfd2kgd = NULL; 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 dev_info(kfd_device, "Initialized module\n"); 120 121 return 0; 122 123 err_topology: 124 kfd_chardev_exit(); 125 err_ioctl: 126 kfd_pasid_exit(); 127 err_pasid: 128 return err; 129 } 130 131 static void __exit kfd_module_exit(void) 132 { 133 kfd_process_destroy_wq(); 134 kfd_topology_shutdown(); 135 kfd_chardev_exit(); 136 kfd_pasid_exit(); 137 dev_info(kfd_device, "Removed module\n"); 138 } 139 140 module_init(kfd_module_init); 141 module_exit(kfd_module_exit); 142 143 MODULE_AUTHOR(KFD_DRIVER_AUTHOR); 144 MODULE_DESCRIPTION(KFD_DRIVER_DESC); 145 MODULE_LICENSE("GPL and additional rights"); 146 MODULE_VERSION(__stringify(KFD_DRIVER_MAJOR) "." 147 __stringify(KFD_DRIVER_MINOR) "." 148 __stringify(KFD_DRIVER_PATCHLEVEL)); 149