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> |
584ec227 | 33 | #include "dma.h" |
5cbafa65 | 34 | #include "dma_v2.h" |
584ec227 DW |
35 | #include "registers.h" |
36 | #include "hw.h" | |
8ab89567 | 37 | |
5149fd01 | 38 | MODULE_VERSION(IOAT_DMA_VERSION); |
bf40a686 | 39 | MODULE_LICENSE("Dual BSD/GPL"); |
8ab89567 SN |
40 | MODULE_AUTHOR("Intel Corporation"); |
41 | ||
42 | static struct pci_device_id ioat_pci_tbl[] = { | |
7bb67c14 | 43 | /* I/OAT v1 platforms */ |
a6417dd5 RD |
44 | { 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) }, | |
7bb67c14 SN |
48 | |
49 | /* I/OAT v2 platforms */ | |
a6417dd5 | 50 | { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB) }, |
7f1b358a MS |
51 | |
52 | /* I/OAT v3 platforms */ | |
a6417dd5 RD |
53 | { 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) }, | |
b265b11f TP |
61 | |
62 | /* I/OAT v3.2 platforms */ | |
a6417dd5 RD |
63 | { 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) }, | |
b265b11f | 73 | |
8ab89567 SN |
74 | { 0, } |
75 | }; | |
6506cbca | 76 | MODULE_DEVICE_TABLE(pci, ioat_pci_tbl); |
8ab89567 | 77 | |
f2427e27 DW |
78 | static int __devinit ioat_pci_probe(struct pci_dev *pdev, |
79 | const struct pci_device_id *id); | |
8ab89567 | 80 | static void __devexit ioat_remove(struct pci_dev *pdev); |
8ab89567 | 81 | |
2ed6dc34 SN |
82 | static int ioat_dca_enabled = 1; |
83 | module_param(ioat_dca_enabled, int, 0644); | |
84 | MODULE_PARM_DESC(ioat_dca_enabled, "control support of dca service (default: 1)"); | |
85 | ||
162b96e6 DW |
86 | struct kmem_cache *ioat2_cache; |
87 | ||
e6c0b69a DW |
88 | #define DRV_NAME "ioatdma" |
89 | ||
7df7cf06 | 90 | static struct pci_driver ioat_pci_driver = { |
e6c0b69a | 91 | .name = DRV_NAME, |
8ab89567 | 92 | .id_table = ioat_pci_tbl, |
f2427e27 | 93 | .probe = ioat_pci_probe, |
8ab89567 | 94 | .remove = __devexit_p(ioat_remove), |
8ab89567 SN |
95 | }; |
96 | ||
f2427e27 DW |
97 | static struct ioatdma_device * |
98 | alloc_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 | ||
110 | static int __devinit ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) | |
8ab89567 | 111 | { |
e6c0b69a | 112 | void __iomem * const *iomap; |
e6c0b69a | 113 | struct device *dev = &pdev->dev; |
f2427e27 | 114 | struct ioatdma_device *device; |
8ab89567 SN |
115 | int err; |
116 | ||
e6c0b69a | 117 | err = pcim_enable_device(pdev); |
8ab89567 | 118 | if (err) |
e6c0b69a | 119 | return err; |
8ab89567 | 120 | |
e6c0b69a | 121 | err = pcim_iomap_regions(pdev, 1 << IOAT_MMIO_BAR, DRV_NAME); |
8ab89567 | 122 | if (err) |
e6c0b69a DW |
123 | return err; |
124 | iomap = pcim_iomap_table(pdev); | |
125 | if (!iomap) | |
126 | return -ENOMEM; | |
8ab89567 | 127 | |
6a35528a | 128 | err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); |
8ab89567 | 129 | if (err) |
284901a9 | 130 | err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
8ab89567 | 131 | if (err) |
e6c0b69a | 132 | return err; |
8ab89567 | 133 | |
6a35528a | 134 | err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); |
8ab89567 | 135 | if (err) |
284901a9 | 136 | err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); |
8ab89567 | 137 | if (err) |
e6c0b69a DW |
138 | return err; |
139 | ||
140 | device = devm_kzalloc(dev, sizeof(*device), GFP_KERNEL); | |
141 | if (!device) | |
142 | return -ENOMEM; | |
8ab89567 | 143 | |
8ab89567 SN |
144 | pci_set_master(pdev); |
145 | ||
f2427e27 DW |
146 | device = alloc_ioatdma(pdev, iomap[IOAT_MMIO_BAR]); |
147 | if (!device) | |
148 | return -ENOMEM; | |
149 | pci_set_drvdata(pdev, device); | |
150 | ||
151 | 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 | |
e6c0b69a | 159 | return -ENODEV; |
4fac7fa5 | 160 | |
f2427e27 | 161 | if (err) { |
e6c0b69a DW |
162 | dev_err(dev, "Intel(R) I/OAT DMA Engine init failed\n"); |
163 | return -ENODEV; | |
164 | } | |
8ab89567 SN |
165 | |
166 | return 0; | |
8ab89567 SN |
167 | } |
168 | ||
8ab89567 SN |
169 | static void __devexit ioat_remove(struct pci_dev *pdev) |
170 | { | |
f2427e27 DW |
171 | struct ioatdma_device *device = pci_get_drvdata(pdev); |
172 | ||
173 | if (!device) | |
174 | return; | |
8ab89567 | 175 | |
4fac7fa5 DW |
176 | dev_err(&pdev->dev, "Removing dma and dca services\n"); |
177 | if (device->dca) { | |
1a5aeeec | 178 | unregister_dca_provider(device->dca, &pdev->dev); |
4fac7fa5 DW |
179 | free_dca_provider(device->dca); |
180 | device->dca = NULL; | |
181 | } | |
f2427e27 | 182 | ioat_dma_remove(device); |
8ab89567 | 183 | } |
8ab89567 SN |
184 | |
185 | static int __init ioat_init_module(void) | |
186 | { | |
162b96e6 DW |
187 | int err; |
188 | ||
5669e31c DW |
189 | pr_info("%s: Intel(R) QuickData Technology Driver %s\n", |
190 | DRV_NAME, IOAT_DMA_VERSION); | |
191 | ||
162b96e6 DW |
192 | 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; | |
8ab89567 SN |
202 | } |
203 | module_init(ioat_init_module); | |
204 | ||
205 | static void __exit ioat_exit_module(void) | |
206 | { | |
7df7cf06 | 207 | pci_unregister_driver(&ioat_pci_driver); |
162b96e6 | 208 | kmem_cache_destroy(ioat2_cache); |
8ab89567 SN |
209 | } |
210 | module_exit(ioat_exit_module); |