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 | * | |
8ab89567 SN |
14 | * The full GNU General Public License is included in this distribution in |
15 | * the file called "COPYING". | |
16 | * | |
17 | */ | |
18 | ||
19 | /* | |
20 | * This driver supports an Intel I/OAT DMA engine, which does asynchronous | |
21 | * copy operations. | |
22 | */ | |
23 | ||
24 | #include <linux/init.h> | |
25 | #include <linux/module.h> | |
26 | #include <linux/pci.h> | |
27 | #include <linux/interrupt.h> | |
2ed6dc34 | 28 | #include <linux/dca.h> |
5a0e3ad6 | 29 | #include <linux/slab.h> |
584ec227 | 30 | #include "dma.h" |
5cbafa65 | 31 | #include "dma_v2.h" |
584ec227 DW |
32 | #include "registers.h" |
33 | #include "hw.h" | |
8ab89567 | 34 | |
5149fd01 | 35 | MODULE_VERSION(IOAT_DMA_VERSION); |
bf40a686 | 36 | MODULE_LICENSE("Dual BSD/GPL"); |
8ab89567 SN |
37 | MODULE_AUTHOR("Intel Corporation"); |
38 | ||
39 | static struct pci_device_id ioat_pci_tbl[] = { | |
7bb67c14 | 40 | /* I/OAT v1 platforms */ |
a6417dd5 RD |
41 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT) }, |
42 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_CNB) }, | |
43 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SCNB) }, | |
44 | { PCI_VDEVICE(UNISYS, PCI_DEVICE_ID_UNISYS_DMA_DIRECTOR) }, | |
7bb67c14 SN |
45 | |
46 | /* I/OAT v2 platforms */ | |
a6417dd5 | 47 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB) }, |
7f1b358a MS |
48 | |
49 | /* I/OAT v3 platforms */ | |
a6417dd5 RD |
50 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG0) }, |
51 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG1) }, | |
52 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG2) }, | |
53 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG3) }, | |
54 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG4) }, | |
55 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG5) }, | |
56 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG6) }, | |
57 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG7) }, | |
b265b11f TP |
58 | |
59 | /* I/OAT v3.2 platforms */ | |
a6417dd5 RD |
60 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF0) }, |
61 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF1) }, | |
62 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF2) }, | |
63 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF3) }, | |
64 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF4) }, | |
65 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF5) }, | |
66 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF6) }, | |
67 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF7) }, | |
68 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF8) }, | |
69 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF9) }, | |
b265b11f | 70 | |
3baef940 DJ |
71 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB0) }, |
72 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB1) }, | |
73 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB2) }, | |
74 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB3) }, | |
75 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB4) }, | |
76 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB5) }, | |
77 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB6) }, | |
78 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB7) }, | |
79 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB8) }, | |
80 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB9) }, | |
81 | ||
8eb4da28 DJ |
82 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB0) }, |
83 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB1) }, | |
84 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB2) }, | |
85 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB3) }, | |
86 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB4) }, | |
87 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB5) }, | |
88 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB6) }, | |
89 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB7) }, | |
90 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB8) }, | |
91 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB9) }, | |
92 | ||
570727b5 DJ |
93 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW0) }, |
94 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW1) }, | |
95 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW2) }, | |
96 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW3) }, | |
97 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW4) }, | |
98 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW5) }, | |
99 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW6) }, | |
100 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW7) }, | |
101 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW8) }, | |
102 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW9) }, | |
103 | ||
0132bcef DJ |
104 | /* I/OAT v3.3 platforms */ |
105 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BWD0) }, | |
106 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BWD1) }, | |
107 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BWD2) }, | |
108 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BWD3) }, | |
109 | ||
68a8cc9e DJ |
110 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDXDE0) }, |
111 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDXDE1) }, | |
112 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDXDE2) }, | |
113 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDXDE3) }, | |
114 | ||
8ab89567 SN |
115 | { 0, } |
116 | }; | |
6506cbca | 117 | MODULE_DEVICE_TABLE(pci, ioat_pci_tbl); |
8ab89567 | 118 | |
4bf27b8b GKH |
119 | static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id); |
120 | static void ioat_remove(struct pci_dev *pdev); | |
8ab89567 | 121 | |
2ed6dc34 SN |
122 | static int ioat_dca_enabled = 1; |
123 | module_param(ioat_dca_enabled, int, 0644); | |
124 | MODULE_PARM_DESC(ioat_dca_enabled, "control support of dca service (default: 1)"); | |
125 | ||
162b96e6 | 126 | struct kmem_cache *ioat2_cache; |
59056e85 | 127 | struct kmem_cache *ioat3_sed_cache; |
162b96e6 | 128 | |
e6c0b69a DW |
129 | #define DRV_NAME "ioatdma" |
130 | ||
7df7cf06 | 131 | static struct pci_driver ioat_pci_driver = { |
e6c0b69a | 132 | .name = DRV_NAME, |
8ab89567 | 133 | .id_table = ioat_pci_tbl, |
f2427e27 | 134 | .probe = ioat_pci_probe, |
a7d6e3ec | 135 | .remove = ioat_remove, |
8ab89567 SN |
136 | }; |
137 | ||
f2427e27 DW |
138 | static struct ioatdma_device * |
139 | alloc_ioatdma(struct pci_dev *pdev, void __iomem *iobase) | |
140 | { | |
141 | struct device *dev = &pdev->dev; | |
142 | struct ioatdma_device *d = devm_kzalloc(dev, sizeof(*d), GFP_KERNEL); | |
143 | ||
144 | if (!d) | |
145 | return NULL; | |
146 | d->pdev = pdev; | |
147 | d->reg_base = iobase; | |
148 | return d; | |
149 | } | |
150 | ||
4bf27b8b | 151 | static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
8ab89567 | 152 | { |
e6c0b69a | 153 | void __iomem * const *iomap; |
e6c0b69a | 154 | struct device *dev = &pdev->dev; |
f2427e27 | 155 | struct ioatdma_device *device; |
8ab89567 SN |
156 | int err; |
157 | ||
e6c0b69a | 158 | err = pcim_enable_device(pdev); |
8ab89567 | 159 | if (err) |
e6c0b69a | 160 | return err; |
8ab89567 | 161 | |
e6c0b69a | 162 | err = pcim_iomap_regions(pdev, 1 << IOAT_MMIO_BAR, DRV_NAME); |
8ab89567 | 163 | if (err) |
e6c0b69a DW |
164 | return err; |
165 | iomap = pcim_iomap_table(pdev); | |
166 | if (!iomap) | |
167 | return -ENOMEM; | |
8ab89567 | 168 | |
6a35528a | 169 | err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); |
8ab89567 | 170 | if (err) |
284901a9 | 171 | err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
8ab89567 | 172 | if (err) |
e6c0b69a | 173 | return err; |
8ab89567 | 174 | |
6a35528a | 175 | err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); |
8ab89567 | 176 | if (err) |
284901a9 | 177 | err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); |
8ab89567 | 178 | if (err) |
e6c0b69a DW |
179 | return err; |
180 | ||
f2427e27 DW |
181 | device = alloc_ioatdma(pdev, iomap[IOAT_MMIO_BAR]); |
182 | if (!device) | |
183 | return -ENOMEM; | |
c86e1401 | 184 | pci_set_master(pdev); |
f2427e27 DW |
185 | pci_set_drvdata(pdev, device); |
186 | ||
187 | device->version = readb(device->reg_base + IOAT_VER_OFFSET); | |
188 | if (device->version == IOAT_VER_1_2) | |
189 | err = ioat1_dma_probe(device, ioat_dca_enabled); | |
190 | else if (device->version == IOAT_VER_2_0) | |
191 | err = ioat2_dma_probe(device, ioat_dca_enabled); | |
192 | else if (device->version >= IOAT_VER_3_0) | |
193 | err = ioat3_dma_probe(device, ioat_dca_enabled); | |
194 | else | |
e6c0b69a | 195 | return -ENODEV; |
4fac7fa5 | 196 | |
f2427e27 | 197 | if (err) { |
e6c0b69a DW |
198 | dev_err(dev, "Intel(R) I/OAT DMA Engine init failed\n"); |
199 | return -ENODEV; | |
200 | } | |
8ab89567 SN |
201 | |
202 | return 0; | |
8ab89567 SN |
203 | } |
204 | ||
4bf27b8b | 205 | static void ioat_remove(struct pci_dev *pdev) |
8ab89567 | 206 | { |
f2427e27 DW |
207 | struct ioatdma_device *device = pci_get_drvdata(pdev); |
208 | ||
209 | if (!device) | |
210 | return; | |
8ab89567 | 211 | |
4fac7fa5 DW |
212 | dev_err(&pdev->dev, "Removing dma and dca services\n"); |
213 | if (device->dca) { | |
1a5aeeec | 214 | unregister_dca_provider(device->dca, &pdev->dev); |
4fac7fa5 DW |
215 | free_dca_provider(device->dca); |
216 | device->dca = NULL; | |
217 | } | |
f2427e27 | 218 | ioat_dma_remove(device); |
8ab89567 | 219 | } |
8ab89567 SN |
220 | |
221 | static int __init ioat_init_module(void) | |
222 | { | |
59056e85 | 223 | int err = -ENOMEM; |
162b96e6 | 224 | |
5669e31c DW |
225 | pr_info("%s: Intel(R) QuickData Technology Driver %s\n", |
226 | DRV_NAME, IOAT_DMA_VERSION); | |
227 | ||
162b96e6 DW |
228 | ioat2_cache = kmem_cache_create("ioat2", sizeof(struct ioat_ring_ent), |
229 | 0, SLAB_HWCACHE_ALIGN, NULL); | |
230 | if (!ioat2_cache) | |
231 | return -ENOMEM; | |
232 | ||
59056e85 DW |
233 | ioat3_sed_cache = KMEM_CACHE(ioat_sed_ent, 0); |
234 | if (!ioat3_sed_cache) | |
235 | goto err_ioat2_cache; | |
236 | ||
162b96e6 DW |
237 | err = pci_register_driver(&ioat_pci_driver); |
238 | if (err) | |
59056e85 DW |
239 | goto err_ioat3_cache; |
240 | ||
241 | return 0; | |
242 | ||
243 | err_ioat3_cache: | |
244 | kmem_cache_destroy(ioat3_sed_cache); | |
245 | ||
246 | err_ioat2_cache: | |
247 | kmem_cache_destroy(ioat2_cache); | |
162b96e6 DW |
248 | |
249 | return err; | |
8ab89567 SN |
250 | } |
251 | module_init(ioat_init_module); | |
252 | ||
253 | static void __exit ioat_exit_module(void) | |
254 | { | |
7df7cf06 | 255 | pci_unregister_driver(&ioat_pci_driver); |
162b96e6 | 256 | kmem_cache_destroy(ioat2_cache); |
8ab89567 SN |
257 | } |
258 | module_exit(ioat_exit_module); |