Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Intel I/OAT DMA Linux driver |
Maciej Sosnowski | 211a22c | 2009-02-26 11:05:43 +0100 | [diff] [blame] | 3 | * Copyright(c) 2007 - 2009 Intel Corporation. |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms and conditions of the GNU General Public License, |
| 7 | * version 2, as published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 12 | * more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License along with |
| 15 | * this program; if not, write to the Free Software Foundation, Inc., |
| 16 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. |
| 17 | * |
| 18 | * The full GNU General Public License is included in this distribution in |
| 19 | * the file called "COPYING". |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | /* |
| 24 | * This driver supports an Intel I/OAT DMA engine, which does asynchronous |
| 25 | * copy operations. |
| 26 | */ |
| 27 | |
| 28 | #include <linux/init.h> |
| 29 | #include <linux/module.h> |
| 30 | #include <linux/pci.h> |
| 31 | #include <linux/interrupt.h> |
Shannon Nelson | 2ed6dc3 | 2007-10-16 01:27:42 -0700 | [diff] [blame] | 32 | #include <linux/dca.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 33 | #include <linux/slab.h> |
Dan Williams | 584ec22 | 2009-07-28 14:32:12 -0700 | [diff] [blame] | 34 | #include "dma.h" |
Dan Williams | 5cbafa6 | 2009-08-26 13:01:44 -0700 | [diff] [blame] | 35 | #include "dma_v2.h" |
Dan Williams | 584ec22 | 2009-07-28 14:32:12 -0700 | [diff] [blame] | 36 | #include "registers.h" |
| 37 | #include "hw.h" |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 38 | |
Shannon Nelson | 5149fd0 | 2007-10-18 03:07:13 -0700 | [diff] [blame] | 39 | MODULE_VERSION(IOAT_DMA_VERSION); |
Dan Williams | bf40a68 | 2009-09-08 17:42:55 -0700 | [diff] [blame] | 40 | MODULE_LICENSE("Dual BSD/GPL"); |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 41 | MODULE_AUTHOR("Intel Corporation"); |
| 42 | |
| 43 | static struct pci_device_id ioat_pci_tbl[] = { |
Shannon Nelson | 7bb67c1 | 2007-11-14 16:59:51 -0800 | [diff] [blame] | 44 | /* I/OAT v1 platforms */ |
Roland Dreier | a6417dd | 2009-09-08 17:43:03 -0700 | [diff] [blame] | 45 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT) }, |
| 46 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_CNB) }, |
| 47 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SCNB) }, |
| 48 | { PCI_VDEVICE(UNISYS, PCI_DEVICE_ID_UNISYS_DMA_DIRECTOR) }, |
Shannon Nelson | 7bb67c1 | 2007-11-14 16:59:51 -0800 | [diff] [blame] | 49 | |
| 50 | /* I/OAT v2 platforms */ |
Roland Dreier | a6417dd | 2009-09-08 17:43:03 -0700 | [diff] [blame] | 51 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB) }, |
Maciej Sosnowski | 7f1b358 | 2008-07-22 17:30:57 -0700 | [diff] [blame] | 52 | |
| 53 | /* I/OAT v3 platforms */ |
Roland Dreier | a6417dd | 2009-09-08 17:43:03 -0700 | [diff] [blame] | 54 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG0) }, |
| 55 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG1) }, |
| 56 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG2) }, |
| 57 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG3) }, |
| 58 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG4) }, |
| 59 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG5) }, |
| 60 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG6) }, |
| 61 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG7) }, |
Tom Picard | b265b11 | 2009-09-08 17:43:01 -0700 | [diff] [blame] | 62 | |
| 63 | /* I/OAT v3.2 platforms */ |
Roland Dreier | a6417dd | 2009-09-08 17:43:03 -0700 | [diff] [blame] | 64 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF0) }, |
| 65 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF1) }, |
| 66 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF2) }, |
| 67 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF3) }, |
| 68 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF4) }, |
| 69 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF5) }, |
| 70 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF6) }, |
| 71 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF7) }, |
| 72 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF8) }, |
| 73 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF9) }, |
Tom Picard | b265b11 | 2009-09-08 17:43:01 -0700 | [diff] [blame] | 74 | |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 75 | { 0, } |
| 76 | }; |
Roland Dreier | 6506cbc | 2009-09-08 17:43:03 -0700 | [diff] [blame] | 77 | MODULE_DEVICE_TABLE(pci, ioat_pci_tbl); |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 78 | |
Dan Williams | f2427e2 | 2009-07-28 14:42:38 -0700 | [diff] [blame] | 79 | static int __devinit ioat_pci_probe(struct pci_dev *pdev, |
| 80 | const struct pci_device_id *id); |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 81 | static void __devexit ioat_remove(struct pci_dev *pdev); |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 82 | |
Shannon Nelson | 2ed6dc3 | 2007-10-16 01:27:42 -0700 | [diff] [blame] | 83 | static int ioat_dca_enabled = 1; |
| 84 | module_param(ioat_dca_enabled, int, 0644); |
| 85 | MODULE_PARM_DESC(ioat_dca_enabled, "control support of dca service (default: 1)"); |
| 86 | |
Dan Williams | 162b96e | 2009-09-08 17:53:04 -0700 | [diff] [blame] | 87 | struct kmem_cache *ioat2_cache; |
| 88 | |
Dan Williams | e6c0b69 | 2009-09-08 17:29:44 -0700 | [diff] [blame] | 89 | #define DRV_NAME "ioatdma" |
| 90 | |
Shannon Nelson | 7df7cf0 | 2007-10-18 03:07:12 -0700 | [diff] [blame] | 91 | static struct pci_driver ioat_pci_driver = { |
Dan Williams | e6c0b69 | 2009-09-08 17:29:44 -0700 | [diff] [blame] | 92 | .name = DRV_NAME, |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 93 | .id_table = ioat_pci_tbl, |
Dan Williams | f2427e2 | 2009-07-28 14:42:38 -0700 | [diff] [blame] | 94 | .probe = ioat_pci_probe, |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 95 | .remove = __devexit_p(ioat_remove), |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 96 | }; |
| 97 | |
Dan Williams | f2427e2 | 2009-07-28 14:42:38 -0700 | [diff] [blame] | 98 | static struct ioatdma_device * |
| 99 | alloc_ioatdma(struct pci_dev *pdev, void __iomem *iobase) |
| 100 | { |
| 101 | struct device *dev = &pdev->dev; |
| 102 | struct ioatdma_device *d = devm_kzalloc(dev, sizeof(*d), GFP_KERNEL); |
| 103 | |
| 104 | if (!d) |
| 105 | return NULL; |
| 106 | d->pdev = pdev; |
| 107 | d->reg_base = iobase; |
| 108 | return d; |
| 109 | } |
| 110 | |
| 111 | static int __devinit ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 112 | { |
Dan Williams | e6c0b69 | 2009-09-08 17:29:44 -0700 | [diff] [blame] | 113 | void __iomem * const *iomap; |
Dan Williams | e6c0b69 | 2009-09-08 17:29:44 -0700 | [diff] [blame] | 114 | struct device *dev = &pdev->dev; |
Dan Williams | f2427e2 | 2009-07-28 14:42:38 -0700 | [diff] [blame] | 115 | struct ioatdma_device *device; |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 116 | int err; |
| 117 | |
Dan Williams | e6c0b69 | 2009-09-08 17:29:44 -0700 | [diff] [blame] | 118 | err = pcim_enable_device(pdev); |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 119 | if (err) |
Dan Williams | e6c0b69 | 2009-09-08 17:29:44 -0700 | [diff] [blame] | 120 | return err; |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 121 | |
Dan Williams | e6c0b69 | 2009-09-08 17:29:44 -0700 | [diff] [blame] | 122 | err = pcim_iomap_regions(pdev, 1 << IOAT_MMIO_BAR, DRV_NAME); |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 123 | if (err) |
Dan Williams | e6c0b69 | 2009-09-08 17:29:44 -0700 | [diff] [blame] | 124 | return err; |
| 125 | iomap = pcim_iomap_table(pdev); |
| 126 | if (!iomap) |
| 127 | return -ENOMEM; |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 128 | |
Yang Hongyang | 6a35528 | 2009-04-06 19:01:13 -0700 | [diff] [blame] | 129 | err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 130 | if (err) |
Yang Hongyang | 284901a | 2009-04-06 19:01:15 -0700 | [diff] [blame] | 131 | err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 132 | if (err) |
Dan Williams | e6c0b69 | 2009-09-08 17:29:44 -0700 | [diff] [blame] | 133 | return err; |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 134 | |
Yang Hongyang | 6a35528 | 2009-04-06 19:01:13 -0700 | [diff] [blame] | 135 | err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 136 | if (err) |
Yang Hongyang | 284901a | 2009-04-06 19:01:15 -0700 | [diff] [blame] | 137 | err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 138 | if (err) |
Dan Williams | e6c0b69 | 2009-09-08 17:29:44 -0700 | [diff] [blame] | 139 | return err; |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 140 | |
Dan Williams | e6c0b69 | 2009-09-08 17:29:44 -0700 | [diff] [blame] | 141 | device = devm_kzalloc(dev, sizeof(*device), GFP_KERNEL); |
| 142 | if (!device) |
| 143 | return -ENOMEM; |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 144 | |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 145 | pci_set_master(pdev); |
| 146 | |
Dan Williams | f2427e2 | 2009-07-28 14:42:38 -0700 | [diff] [blame] | 147 | device = alloc_ioatdma(pdev, iomap[IOAT_MMIO_BAR]); |
| 148 | if (!device) |
| 149 | return -ENOMEM; |
| 150 | pci_set_drvdata(pdev, device); |
Dan Williams | 4fac7fa | 2009-01-06 11:38:20 -0700 | [diff] [blame] | 151 | |
Dan Williams | f2427e2 | 2009-07-28 14:42:38 -0700 | [diff] [blame] | 152 | device->version = readb(device->reg_base + IOAT_VER_OFFSET); |
| 153 | if (device->version == IOAT_VER_1_2) |
| 154 | err = ioat1_dma_probe(device, ioat_dca_enabled); |
| 155 | else if (device->version == IOAT_VER_2_0) |
| 156 | err = ioat2_dma_probe(device, ioat_dca_enabled); |
| 157 | else if (device->version >= IOAT_VER_3_0) |
| 158 | err = ioat3_dma_probe(device, ioat_dca_enabled); |
| 159 | else |
| 160 | return -ENODEV; |
| 161 | |
| 162 | if (err) { |
Dan Williams | e6c0b69 | 2009-09-08 17:29:44 -0700 | [diff] [blame] | 163 | dev_err(dev, "Intel(R) I/OAT DMA Engine init failed\n"); |
| 164 | return -ENODEV; |
| 165 | } |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 166 | |
| 167 | return 0; |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 168 | } |
| 169 | |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 170 | static void __devexit ioat_remove(struct pci_dev *pdev) |
| 171 | { |
Dan Williams | f2427e2 | 2009-07-28 14:42:38 -0700 | [diff] [blame] | 172 | struct ioatdma_device *device = pci_get_drvdata(pdev); |
| 173 | |
| 174 | if (!device) |
| 175 | return; |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 176 | |
Dan Williams | 4fac7fa | 2009-01-06 11:38:20 -0700 | [diff] [blame] | 177 | dev_err(&pdev->dev, "Removing dma and dca services\n"); |
| 178 | if (device->dca) { |
Maciej Sosnowski | 1a5aeee | 2009-09-10 15:05:58 +0200 | [diff] [blame] | 179 | unregister_dca_provider(device->dca, &pdev->dev); |
Dan Williams | 4fac7fa | 2009-01-06 11:38:20 -0700 | [diff] [blame] | 180 | free_dca_provider(device->dca); |
| 181 | device->dca = NULL; |
| 182 | } |
Dan Williams | f2427e2 | 2009-07-28 14:42:38 -0700 | [diff] [blame] | 183 | ioat_dma_remove(device); |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 184 | } |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 185 | |
| 186 | static int __init ioat_init_module(void) |
| 187 | { |
Dan Williams | 162b96e | 2009-09-08 17:53:04 -0700 | [diff] [blame] | 188 | int err; |
| 189 | |
Dan Williams | 5669e31 | 2009-09-08 17:42:56 -0700 | [diff] [blame] | 190 | pr_info("%s: Intel(R) QuickData Technology Driver %s\n", |
| 191 | DRV_NAME, IOAT_DMA_VERSION); |
| 192 | |
Dan Williams | 162b96e | 2009-09-08 17:53:04 -0700 | [diff] [blame] | 193 | ioat2_cache = kmem_cache_create("ioat2", sizeof(struct ioat_ring_ent), |
| 194 | 0, SLAB_HWCACHE_ALIGN, NULL); |
| 195 | if (!ioat2_cache) |
| 196 | return -ENOMEM; |
| 197 | |
| 198 | err = pci_register_driver(&ioat_pci_driver); |
| 199 | if (err) |
| 200 | kmem_cache_destroy(ioat2_cache); |
| 201 | |
| 202 | return err; |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 203 | } |
| 204 | module_init(ioat_init_module); |
| 205 | |
| 206 | static void __exit ioat_exit_module(void) |
| 207 | { |
Shannon Nelson | 7df7cf0 | 2007-10-18 03:07:12 -0700 | [diff] [blame] | 208 | pci_unregister_driver(&ioat_pci_driver); |
Dan Williams | 162b96e | 2009-09-08 17:53:04 -0700 | [diff] [blame] | 209 | kmem_cache_destroy(ioat2_cache); |
Shannon Nelson | 8ab8956 | 2007-10-16 01:27:39 -0700 | [diff] [blame] | 210 | } |
| 211 | module_exit(ioat_exit_module); |