Commit | Line | Data |
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8ab89567 SN |
1 | /* |
2 | * Intel I/OAT DMA Linux driver | |
211a22ce | 3 | * Copyright(c) 2007 - 2009 Intel Corporation. |
8ab89567 SN |
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> | |
2ed6dc34 | 32 | #include <linux/dca.h> |
5a0e3ad6 | 33 | #include <linux/slab.h> |
584ec227 | 34 | #include "dma.h" |
5cbafa65 | 35 | #include "dma_v2.h" |
584ec227 DW |
36 | #include "registers.h" |
37 | #include "hw.h" | |
8ab89567 | 38 | |
5149fd01 | 39 | MODULE_VERSION(IOAT_DMA_VERSION); |
bf40a686 | 40 | MODULE_LICENSE("Dual BSD/GPL"); |
8ab89567 SN |
41 | MODULE_AUTHOR("Intel Corporation"); |
42 | ||
43 | static struct pci_device_id ioat_pci_tbl[] = { | |
7bb67c14 | 44 | /* I/OAT v1 platforms */ |
a6417dd5 RD |
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) }, | |
7bb67c14 SN |
49 | |
50 | /* I/OAT v2 platforms */ | |
a6417dd5 | 51 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB) }, |
7f1b358a MS |
52 | |
53 | /* I/OAT v3 platforms */ | |
a6417dd5 RD |
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) }, | |
b265b11f TP |
62 | |
63 | /* I/OAT v3.2 platforms */ | |
a6417dd5 RD |
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) }, | |
b265b11f | 74 | |
3baef940 DJ |
75 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB0) }, |
76 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB1) }, | |
77 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB2) }, | |
78 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB3) }, | |
79 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB4) }, | |
80 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB5) }, | |
81 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB6) }, | |
82 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB7) }, | |
83 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB8) }, | |
84 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB9) }, | |
85 | ||
8eb4da28 DJ |
86 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB0) }, |
87 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB1) }, | |
88 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB2) }, | |
89 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB3) }, | |
90 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB4) }, | |
91 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB5) }, | |
92 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB6) }, | |
93 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB7) }, | |
94 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB8) }, | |
95 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB9) }, | |
96 | ||
8ab89567 SN |
97 | { 0, } |
98 | }; | |
6506cbca | 99 | MODULE_DEVICE_TABLE(pci, ioat_pci_tbl); |
8ab89567 | 100 | |
4bf27b8b GKH |
101 | static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id); |
102 | static void ioat_remove(struct pci_dev *pdev); | |
8ab89567 | 103 | |
2ed6dc34 SN |
104 | static int ioat_dca_enabled = 1; |
105 | module_param(ioat_dca_enabled, int, 0644); | |
106 | MODULE_PARM_DESC(ioat_dca_enabled, "control support of dca service (default: 1)"); | |
107 | ||
162b96e6 DW |
108 | struct kmem_cache *ioat2_cache; |
109 | ||
e6c0b69a DW |
110 | #define DRV_NAME "ioatdma" |
111 | ||
7df7cf06 | 112 | static struct pci_driver ioat_pci_driver = { |
e6c0b69a | 113 | .name = DRV_NAME, |
8ab89567 | 114 | .id_table = ioat_pci_tbl, |
f2427e27 | 115 | .probe = ioat_pci_probe, |
a7d6e3ec | 116 | .remove = ioat_remove, |
8ab89567 SN |
117 | }; |
118 | ||
f2427e27 DW |
119 | static struct ioatdma_device * |
120 | alloc_ioatdma(struct pci_dev *pdev, void __iomem *iobase) | |
121 | { | |
122 | struct device *dev = &pdev->dev; | |
123 | struct ioatdma_device *d = devm_kzalloc(dev, sizeof(*d), GFP_KERNEL); | |
124 | ||
125 | if (!d) | |
126 | return NULL; | |
127 | d->pdev = pdev; | |
128 | d->reg_base = iobase; | |
129 | return d; | |
130 | } | |
131 | ||
4bf27b8b | 132 | static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
8ab89567 | 133 | { |
e6c0b69a | 134 | void __iomem * const *iomap; |
e6c0b69a | 135 | struct device *dev = &pdev->dev; |
f2427e27 | 136 | struct ioatdma_device *device; |
8ab89567 SN |
137 | int err; |
138 | ||
e6c0b69a | 139 | err = pcim_enable_device(pdev); |
8ab89567 | 140 | if (err) |
e6c0b69a | 141 | return err; |
8ab89567 | 142 | |
e6c0b69a | 143 | err = pcim_iomap_regions(pdev, 1 << IOAT_MMIO_BAR, DRV_NAME); |
8ab89567 | 144 | if (err) |
e6c0b69a DW |
145 | return err; |
146 | iomap = pcim_iomap_table(pdev); | |
147 | if (!iomap) | |
148 | return -ENOMEM; | |
8ab89567 | 149 | |
6a35528a | 150 | err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); |
8ab89567 | 151 | if (err) |
284901a9 | 152 | err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
8ab89567 | 153 | if (err) |
e6c0b69a | 154 | return err; |
8ab89567 | 155 | |
6a35528a | 156 | err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); |
8ab89567 | 157 | if (err) |
284901a9 | 158 | err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); |
8ab89567 | 159 | if (err) |
e6c0b69a DW |
160 | return err; |
161 | ||
f2427e27 DW |
162 | device = alloc_ioatdma(pdev, iomap[IOAT_MMIO_BAR]); |
163 | if (!device) | |
164 | return -ENOMEM; | |
c86e1401 | 165 | pci_set_master(pdev); |
f2427e27 DW |
166 | pci_set_drvdata(pdev, device); |
167 | ||
168 | device->version = readb(device->reg_base + IOAT_VER_OFFSET); | |
169 | if (device->version == IOAT_VER_1_2) | |
170 | err = ioat1_dma_probe(device, ioat_dca_enabled); | |
171 | else if (device->version == IOAT_VER_2_0) | |
172 | err = ioat2_dma_probe(device, ioat_dca_enabled); | |
173 | else if (device->version >= IOAT_VER_3_0) | |
174 | err = ioat3_dma_probe(device, ioat_dca_enabled); | |
175 | else | |
e6c0b69a | 176 | return -ENODEV; |
4fac7fa5 | 177 | |
f2427e27 | 178 | if (err) { |
e6c0b69a DW |
179 | dev_err(dev, "Intel(R) I/OAT DMA Engine init failed\n"); |
180 | return -ENODEV; | |
181 | } | |
8ab89567 SN |
182 | |
183 | return 0; | |
8ab89567 SN |
184 | } |
185 | ||
4bf27b8b | 186 | static void ioat_remove(struct pci_dev *pdev) |
8ab89567 | 187 | { |
f2427e27 DW |
188 | struct ioatdma_device *device = pci_get_drvdata(pdev); |
189 | ||
190 | if (!device) | |
191 | return; | |
8ab89567 | 192 | |
4fac7fa5 DW |
193 | dev_err(&pdev->dev, "Removing dma and dca services\n"); |
194 | if (device->dca) { | |
1a5aeeec | 195 | unregister_dca_provider(device->dca, &pdev->dev); |
4fac7fa5 DW |
196 | free_dca_provider(device->dca); |
197 | device->dca = NULL; | |
198 | } | |
f2427e27 | 199 | ioat_dma_remove(device); |
8ab89567 | 200 | } |
8ab89567 SN |
201 | |
202 | static int __init ioat_init_module(void) | |
203 | { | |
162b96e6 DW |
204 | int err; |
205 | ||
5669e31c DW |
206 | pr_info("%s: Intel(R) QuickData Technology Driver %s\n", |
207 | DRV_NAME, IOAT_DMA_VERSION); | |
208 | ||
162b96e6 DW |
209 | ioat2_cache = kmem_cache_create("ioat2", sizeof(struct ioat_ring_ent), |
210 | 0, SLAB_HWCACHE_ALIGN, NULL); | |
211 | if (!ioat2_cache) | |
212 | return -ENOMEM; | |
213 | ||
214 | err = pci_register_driver(&ioat_pci_driver); | |
215 | if (err) | |
216 | kmem_cache_destroy(ioat2_cache); | |
217 | ||
218 | return err; | |
8ab89567 SN |
219 | } |
220 | module_init(ioat_init_module); | |
221 | ||
222 | static void __exit ioat_exit_module(void) | |
223 | { | |
7df7cf06 | 224 | pci_unregister_driver(&ioat_pci_driver); |
162b96e6 | 225 | kmem_cache_destroy(ioat2_cache); |
8ab89567 SN |
226 | } |
227 | module_exit(ioat_exit_module); |