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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> |
8ab89567 SN |
33 | #include "ioatdma.h" |
34 | #include "ioatdma_registers.h" | |
35 | #include "ioatdma_hw.h" | |
36 | ||
5149fd01 | 37 | MODULE_VERSION(IOAT_DMA_VERSION); |
8ab89567 SN |
38 | MODULE_LICENSE("GPL"); |
39 | MODULE_AUTHOR("Intel Corporation"); | |
40 | ||
41 | static struct pci_device_id ioat_pci_tbl[] = { | |
7bb67c14 | 42 | /* I/OAT v1 platforms */ |
8ab89567 SN |
43 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT) }, |
44 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_CNB) }, | |
45 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_SCNB) }, | |
46 | { PCI_DEVICE(PCI_VENDOR_ID_UNISYS, PCI_DEVICE_ID_UNISYS_DMA_DIRECTOR) }, | |
7bb67c14 SN |
47 | |
48 | /* I/OAT v2 platforms */ | |
49 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB) }, | |
7f1b358a MS |
50 | |
51 | /* I/OAT v3 platforms */ | |
52 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG0) }, | |
53 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG1) }, | |
54 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG2) }, | |
55 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG3) }, | |
56 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG4) }, | |
57 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG5) }, | |
58 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG6) }, | |
59 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG7) }, | |
8ab89567 SN |
60 | { 0, } |
61 | }; | |
62 | ||
63 | struct ioat_device { | |
64 | struct pci_dev *pdev; | |
65 | void __iomem *iobase; | |
66 | struct ioatdma_device *dma; | |
2ed6dc34 | 67 | struct dca_provider *dca; |
8ab89567 SN |
68 | }; |
69 | ||
70 | static int __devinit ioat_probe(struct pci_dev *pdev, | |
71 | const struct pci_device_id *id); | |
8ab89567 | 72 | static void __devexit ioat_remove(struct pci_dev *pdev); |
8ab89567 | 73 | |
2ed6dc34 SN |
74 | static int ioat_dca_enabled = 1; |
75 | module_param(ioat_dca_enabled, int, 0644); | |
76 | MODULE_PARM_DESC(ioat_dca_enabled, "control support of dca service (default: 1)"); | |
77 | ||
7df7cf06 | 78 | static struct pci_driver ioat_pci_driver = { |
8ab89567 SN |
79 | .name = "ioatdma", |
80 | .id_table = ioat_pci_tbl, | |
81 | .probe = ioat_probe, | |
8ab89567 | 82 | .remove = __devexit_p(ioat_remove), |
8ab89567 SN |
83 | }; |
84 | ||
85 | static int __devinit ioat_probe(struct pci_dev *pdev, | |
86 | const struct pci_device_id *id) | |
87 | { | |
88 | void __iomem *iobase; | |
89 | struct ioat_device *device; | |
90 | unsigned long mmio_start, mmio_len; | |
91 | int err; | |
92 | ||
93 | err = pci_enable_device(pdev); | |
94 | if (err) | |
95 | goto err_enable_device; | |
96 | ||
7df7cf06 | 97 | err = pci_request_regions(pdev, ioat_pci_driver.name); |
8ab89567 SN |
98 | if (err) |
99 | goto err_request_regions; | |
100 | ||
101 | err = pci_set_dma_mask(pdev, DMA_64BIT_MASK); | |
102 | if (err) | |
103 | err = pci_set_dma_mask(pdev, DMA_32BIT_MASK); | |
104 | if (err) | |
105 | goto err_set_dma_mask; | |
106 | ||
107 | err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK); | |
108 | if (err) | |
109 | err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); | |
110 | if (err) | |
111 | goto err_set_dma_mask; | |
112 | ||
113 | mmio_start = pci_resource_start(pdev, 0); | |
114 | mmio_len = pci_resource_len(pdev, 0); | |
115 | iobase = ioremap(mmio_start, mmio_len); | |
116 | if (!iobase) { | |
117 | err = -ENOMEM; | |
118 | goto err_ioremap; | |
119 | } | |
120 | ||
121 | device = kzalloc(sizeof(*device), GFP_KERNEL); | |
122 | if (!device) { | |
123 | err = -ENOMEM; | |
124 | goto err_kzalloc; | |
125 | } | |
126 | device->pdev = pdev; | |
127 | pci_set_drvdata(pdev, device); | |
128 | device->iobase = iobase; | |
129 | ||
130 | pci_set_master(pdev); | |
131 | ||
4fac7fa5 DW |
132 | switch (readb(iobase + IOAT_VER_OFFSET)) { |
133 | case IOAT_VER_1_2: | |
134 | device->dma = ioat_dma_probe(pdev, iobase); | |
135 | if (device->dma && ioat_dca_enabled) | |
136 | device->dca = ioat_dca_init(pdev, iobase); | |
137 | break; | |
138 | case IOAT_VER_2_0: | |
139 | device->dma = ioat_dma_probe(pdev, iobase); | |
140 | if (device->dma && ioat_dca_enabled) | |
141 | device->dca = ioat2_dca_init(pdev, iobase); | |
142 | break; | |
143 | case IOAT_VER_3_0: | |
144 | device->dma = ioat_dma_probe(pdev, iobase); | |
145 | if (device->dma && ioat_dca_enabled) | |
146 | device->dca = ioat3_dca_init(pdev, iobase); | |
147 | break; | |
148 | default: | |
149 | err = -ENODEV; | |
150 | break; | |
151 | } | |
152 | if (!device->dma) | |
153 | err = -ENODEV; | |
154 | ||
8ab89567 SN |
155 | if (err) |
156 | goto err_version; | |
157 | ||
158 | return 0; | |
159 | ||
160 | err_version: | |
161 | kfree(device); | |
162 | err_kzalloc: | |
163 | iounmap(iobase); | |
164 | err_ioremap: | |
165 | err_set_dma_mask: | |
166 | pci_release_regions(pdev); | |
167 | pci_disable_device(pdev); | |
168 | err_request_regions: | |
169 | err_enable_device: | |
170 | return err; | |
171 | } | |
172 | ||
8ab89567 SN |
173 | static void __devexit ioat_remove(struct pci_dev *pdev) |
174 | { | |
175 | struct ioat_device *device = pci_get_drvdata(pdev); | |
176 | ||
4fac7fa5 DW |
177 | dev_err(&pdev->dev, "Removing dma and dca services\n"); |
178 | if (device->dca) { | |
179 | unregister_dca_provider(device->dca); | |
180 | free_dca_provider(device->dca); | |
181 | device->dca = NULL; | |
182 | } | |
183 | ||
184 | if (device->dma) { | |
185 | ioat_dma_remove(device->dma); | |
186 | device->dma = NULL; | |
187 | } | |
8ab89567 SN |
188 | |
189 | kfree(device); | |
8ab89567 | 190 | } |
8ab89567 SN |
191 | |
192 | static int __init ioat_init_module(void) | |
193 | { | |
7df7cf06 | 194 | return pci_register_driver(&ioat_pci_driver); |
8ab89567 SN |
195 | } |
196 | module_init(ioat_init_module); | |
197 | ||
198 | static void __exit ioat_exit_module(void) | |
199 | { | |
7df7cf06 | 200 | pci_unregister_driver(&ioat_pci_driver); |
8ab89567 SN |
201 | } |
202 | module_exit(ioat_exit_module); |