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Shannon Nelson8ab89562007-10-16 01:27:39 -07001/*
2 * Intel I/OAT DMA Linux driver
Maciej Sosnowski211a22c2009-02-26 11:05:43 +01003 * Copyright(c) 2007 - 2009 Intel Corporation.
Shannon Nelson8ab89562007-10-16 01:27:39 -07004 *
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 Nelson2ed6dc32007-10-16 01:27:42 -070032#include <linux/dca.h>
Dan Williams584ec222009-07-28 14:32:12 -070033#include "dma.h"
Dan Williams5cbafa62009-08-26 13:01:44 -070034#include "dma_v2.h"
Dan Williams584ec222009-07-28 14:32:12 -070035#include "registers.h"
36#include "hw.h"
Shannon Nelson8ab89562007-10-16 01:27:39 -070037
Shannon Nelson5149fd02007-10-18 03:07:13 -070038MODULE_VERSION(IOAT_DMA_VERSION);
Dan Williamsbf40a682009-09-08 17:42:55 -070039MODULE_LICENSE("Dual BSD/GPL");
Shannon Nelson8ab89562007-10-16 01:27:39 -070040MODULE_AUTHOR("Intel Corporation");
41
42static struct pci_device_id ioat_pci_tbl[] = {
Shannon Nelson7bb67c12007-11-14 16:59:51 -080043 /* I/OAT v1 platforms */
Roland Dreiera6417dd2009-09-08 17:43:03 -070044 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT) },
45 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_CNB) },
46 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SCNB) },
47 { PCI_VDEVICE(UNISYS, PCI_DEVICE_ID_UNISYS_DMA_DIRECTOR) },
Shannon Nelson7bb67c12007-11-14 16:59:51 -080048
49 /* I/OAT v2 platforms */
Roland Dreiera6417dd2009-09-08 17:43:03 -070050 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB) },
Maciej Sosnowski7f1b3582008-07-22 17:30:57 -070051
52 /* I/OAT v3 platforms */
Roland Dreiera6417dd2009-09-08 17:43:03 -070053 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG0) },
54 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG1) },
55 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG2) },
56 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG3) },
57 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG4) },
58 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG5) },
59 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG6) },
60 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG7) },
Tom Picardb265b112009-09-08 17:43:01 -070061
62 /* I/OAT v3.2 platforms */
Roland Dreiera6417dd2009-09-08 17:43:03 -070063 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF0) },
64 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF1) },
65 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF2) },
66 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF3) },
67 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF4) },
68 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF5) },
69 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF6) },
70 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF7) },
71 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF8) },
72 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF9) },
Tom Picardb265b112009-09-08 17:43:01 -070073
Shannon Nelson8ab89562007-10-16 01:27:39 -070074 { 0, }
75};
Roland Dreier6506cbc2009-09-08 17:43:03 -070076MODULE_DEVICE_TABLE(pci, ioat_pci_tbl);
Shannon Nelson8ab89562007-10-16 01:27:39 -070077
Dan Williamsf2427e22009-07-28 14:42:38 -070078static int __devinit ioat_pci_probe(struct pci_dev *pdev,
79 const struct pci_device_id *id);
Shannon Nelson8ab89562007-10-16 01:27:39 -070080static void __devexit ioat_remove(struct pci_dev *pdev);
Shannon Nelson8ab89562007-10-16 01:27:39 -070081
Shannon Nelson2ed6dc32007-10-16 01:27:42 -070082static int ioat_dca_enabled = 1;
83module_param(ioat_dca_enabled, int, 0644);
84MODULE_PARM_DESC(ioat_dca_enabled, "control support of dca service (default: 1)");
85
Dan Williams162b96e2009-09-08 17:53:04 -070086struct kmem_cache *ioat2_cache;
87
Dan Williamse6c0b692009-09-08 17:29:44 -070088#define DRV_NAME "ioatdma"
89
Shannon Nelson7df7cf02007-10-18 03:07:12 -070090static struct pci_driver ioat_pci_driver = {
Dan Williamse6c0b692009-09-08 17:29:44 -070091 .name = DRV_NAME,
Shannon Nelson8ab89562007-10-16 01:27:39 -070092 .id_table = ioat_pci_tbl,
Dan Williamsf2427e22009-07-28 14:42:38 -070093 .probe = ioat_pci_probe,
Shannon Nelson8ab89562007-10-16 01:27:39 -070094 .remove = __devexit_p(ioat_remove),
Shannon Nelson8ab89562007-10-16 01:27:39 -070095};
96
Dan Williamsf2427e22009-07-28 14:42:38 -070097static struct ioatdma_device *
98alloc_ioatdma(struct pci_dev *pdev, void __iomem *iobase)
99{
100 struct device *dev = &pdev->dev;
101 struct ioatdma_device *d = devm_kzalloc(dev, sizeof(*d), GFP_KERNEL);
102
103 if (!d)
104 return NULL;
105 d->pdev = pdev;
106 d->reg_base = iobase;
107 return d;
108}
109
110static int __devinit ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
Shannon Nelson8ab89562007-10-16 01:27:39 -0700111{
Dan Williamse6c0b692009-09-08 17:29:44 -0700112 void __iomem * const *iomap;
Dan Williamse6c0b692009-09-08 17:29:44 -0700113 struct device *dev = &pdev->dev;
Dan Williamsf2427e22009-07-28 14:42:38 -0700114 struct ioatdma_device *device;
Shannon Nelson8ab89562007-10-16 01:27:39 -0700115 int err;
116
Dan Williamse6c0b692009-09-08 17:29:44 -0700117 err = pcim_enable_device(pdev);
Shannon Nelson8ab89562007-10-16 01:27:39 -0700118 if (err)
Dan Williamse6c0b692009-09-08 17:29:44 -0700119 return err;
Shannon Nelson8ab89562007-10-16 01:27:39 -0700120
Dan Williamse6c0b692009-09-08 17:29:44 -0700121 err = pcim_iomap_regions(pdev, 1 << IOAT_MMIO_BAR, DRV_NAME);
Shannon Nelson8ab89562007-10-16 01:27:39 -0700122 if (err)
Dan Williamse6c0b692009-09-08 17:29:44 -0700123 return err;
124 iomap = pcim_iomap_table(pdev);
125 if (!iomap)
126 return -ENOMEM;
Shannon Nelson8ab89562007-10-16 01:27:39 -0700127
Yang Hongyang6a355282009-04-06 19:01:13 -0700128 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
Shannon Nelson8ab89562007-10-16 01:27:39 -0700129 if (err)
Yang Hongyang284901a2009-04-06 19:01:15 -0700130 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
Shannon Nelson8ab89562007-10-16 01:27:39 -0700131 if (err)
Dan Williamse6c0b692009-09-08 17:29:44 -0700132 return err;
Shannon Nelson8ab89562007-10-16 01:27:39 -0700133
Yang Hongyang6a355282009-04-06 19:01:13 -0700134 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
Shannon Nelson8ab89562007-10-16 01:27:39 -0700135 if (err)
Yang Hongyang284901a2009-04-06 19:01:15 -0700136 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
Shannon Nelson8ab89562007-10-16 01:27:39 -0700137 if (err)
Dan Williamse6c0b692009-09-08 17:29:44 -0700138 return err;
Shannon Nelson8ab89562007-10-16 01:27:39 -0700139
Dan Williamse6c0b692009-09-08 17:29:44 -0700140 device = devm_kzalloc(dev, sizeof(*device), GFP_KERNEL);
141 if (!device)
142 return -ENOMEM;
Shannon Nelson8ab89562007-10-16 01:27:39 -0700143
Shannon Nelson8ab89562007-10-16 01:27:39 -0700144 pci_set_master(pdev);
145
Dan Williamsf2427e22009-07-28 14:42:38 -0700146 device = alloc_ioatdma(pdev, iomap[IOAT_MMIO_BAR]);
147 if (!device)
148 return -ENOMEM;
149 pci_set_drvdata(pdev, device);
Dan Williams4fac7fa2009-01-06 11:38:20 -0700150
Dan Williamsf2427e22009-07-28 14:42:38 -0700151 device->version = readb(device->reg_base + IOAT_VER_OFFSET);
152 if (device->version == IOAT_VER_1_2)
153 err = ioat1_dma_probe(device, ioat_dca_enabled);
154 else if (device->version == IOAT_VER_2_0)
155 err = ioat2_dma_probe(device, ioat_dca_enabled);
156 else if (device->version >= IOAT_VER_3_0)
157 err = ioat3_dma_probe(device, ioat_dca_enabled);
158 else
159 return -ENODEV;
160
161 if (err) {
Dan Williamse6c0b692009-09-08 17:29:44 -0700162 dev_err(dev, "Intel(R) I/OAT DMA Engine init failed\n");
163 return -ENODEV;
164 }
Shannon Nelson8ab89562007-10-16 01:27:39 -0700165
166 return 0;
Shannon Nelson8ab89562007-10-16 01:27:39 -0700167}
168
Shannon Nelson8ab89562007-10-16 01:27:39 -0700169static void __devexit ioat_remove(struct pci_dev *pdev)
170{
Dan Williamsf2427e22009-07-28 14:42:38 -0700171 struct ioatdma_device *device = pci_get_drvdata(pdev);
172
173 if (!device)
174 return;
Shannon Nelson8ab89562007-10-16 01:27:39 -0700175
Dan Williams4fac7fa2009-01-06 11:38:20 -0700176 dev_err(&pdev->dev, "Removing dma and dca services\n");
177 if (device->dca) {
Maciej Sosnowski1a5aeee2009-09-10 15:05:58 +0200178 unregister_dca_provider(device->dca, &pdev->dev);
Dan Williams4fac7fa2009-01-06 11:38:20 -0700179 free_dca_provider(device->dca);
180 device->dca = NULL;
181 }
Dan Williamsf2427e22009-07-28 14:42:38 -0700182 ioat_dma_remove(device);
Shannon Nelson8ab89562007-10-16 01:27:39 -0700183}
Shannon Nelson8ab89562007-10-16 01:27:39 -0700184
185static int __init ioat_init_module(void)
186{
Dan Williams162b96e2009-09-08 17:53:04 -0700187 int err;
188
Dan Williams5669e312009-09-08 17:42:56 -0700189 pr_info("%s: Intel(R) QuickData Technology Driver %s\n",
190 DRV_NAME, IOAT_DMA_VERSION);
191
Dan Williams162b96e2009-09-08 17:53:04 -0700192 ioat2_cache = kmem_cache_create("ioat2", sizeof(struct ioat_ring_ent),
193 0, SLAB_HWCACHE_ALIGN, NULL);
194 if (!ioat2_cache)
195 return -ENOMEM;
196
197 err = pci_register_driver(&ioat_pci_driver);
198 if (err)
199 kmem_cache_destroy(ioat2_cache);
200
201 return err;
Shannon Nelson8ab89562007-10-16 01:27:39 -0700202}
203module_init(ioat_init_module);
204
205static void __exit ioat_exit_module(void)
206{
Shannon Nelson7df7cf02007-10-18 03:07:12 -0700207 pci_unregister_driver(&ioat_pci_driver);
Dan Williams162b96e2009-09-08 17:53:04 -0700208 kmem_cache_destroy(ioat2_cache);
Shannon Nelson8ab89562007-10-16 01:27:39 -0700209}
210module_exit(ioat_exit_module);