2 * Intel I/OAT DMA Linux driver
3 * Copyright(c) 2007 - 2009 Intel Corporation.
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.
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
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.
18 * The full GNU General Public License is included in this distribution in
19 * the file called "COPYING".
24 * This driver supports an Intel I/OAT DMA engine, which does asynchronous
28 #include <linux/init.h>
29 #include <linux/module.h>
30 #include <linux/pci.h>
31 #include <linux/interrupt.h>
32 #include <linux/dca.h>
33 #include <linux/slab.h>
36 #include "registers.h"
39 MODULE_VERSION(IOAT_DMA_VERSION
);
40 MODULE_LICENSE("Dual BSD/GPL");
41 MODULE_AUTHOR("Intel Corporation");
43 #define PCI_DEVICE_ID_INTEL_IOAT_IVB0 0x0e20
44 #define PCI_DEVICE_ID_INTEL_IOAT_IVB1 0x0e21
45 #define PCI_DEVICE_ID_INTEL_IOAT_IVB2 0x0e22
46 #define PCI_DEVICE_ID_INTEL_IOAT_IVB3 0x0e23
47 #define PCI_DEVICE_ID_INTEL_IOAT_IVB4 0x0e24
48 #define PCI_DEVICE_ID_INTEL_IOAT_IVB5 0x0e25
49 #define PCI_DEVICE_ID_INTEL_IOAT_IVB6 0x0e26
50 #define PCI_DEVICE_ID_INTEL_IOAT_IVB7 0x0e27
51 #define PCI_DEVICE_ID_INTEL_IOAT_IVB8 0x0e2e
52 #define PCI_DEVICE_ID_INTEL_IOAT_IVB9 0x0e2f
54 static struct pci_device_id ioat_pci_tbl
[] = {
55 /* I/OAT v1 platforms */
56 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT
) },
57 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_CNB
) },
58 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_SCNB
) },
59 { PCI_VDEVICE(UNISYS
, PCI_DEVICE_ID_UNISYS_DMA_DIRECTOR
) },
61 /* I/OAT v2 platforms */
62 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_SNB
) },
64 /* I/OAT v3 platforms */
65 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_TBG0
) },
66 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_TBG1
) },
67 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_TBG2
) },
68 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_TBG3
) },
69 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_TBG4
) },
70 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_TBG5
) },
71 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_TBG6
) },
72 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_TBG7
) },
74 /* I/OAT v3.2 platforms */
75 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_JSF0
) },
76 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_JSF1
) },
77 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_JSF2
) },
78 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_JSF3
) },
79 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_JSF4
) },
80 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_JSF5
) },
81 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_JSF6
) },
82 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_JSF7
) },
83 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_JSF8
) },
84 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_JSF9
) },
86 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_SNB0
) },
87 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_SNB1
) },
88 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_SNB2
) },
89 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_SNB3
) },
90 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_SNB4
) },
91 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_SNB5
) },
92 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_SNB6
) },
93 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_SNB7
) },
94 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_SNB8
) },
95 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_SNB9
) },
97 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_IVB0
) },
98 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_IVB1
) },
99 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_IVB2
) },
100 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_IVB3
) },
101 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_IVB4
) },
102 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_IVB5
) },
103 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_IVB6
) },
104 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_IVB7
) },
105 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_IVB8
) },
106 { PCI_VDEVICE(INTEL
, PCI_DEVICE_ID_INTEL_IOAT_IVB9
) },
110 MODULE_DEVICE_TABLE(pci
, ioat_pci_tbl
);
112 static int ioat_pci_probe(struct pci_dev
*pdev
, const struct pci_device_id
*id
);
113 static void ioat_remove(struct pci_dev
*pdev
);
115 static int ioat_dca_enabled
= 1;
116 module_param(ioat_dca_enabled
, int, 0644);
117 MODULE_PARM_DESC(ioat_dca_enabled
, "control support of dca service (default: 1)");
119 struct kmem_cache
*ioat2_cache
;
121 #define DRV_NAME "ioatdma"
123 static struct pci_driver ioat_pci_driver
= {
125 .id_table
= ioat_pci_tbl
,
126 .probe
= ioat_pci_probe
,
127 .remove
= ioat_remove
,
130 static struct ioatdma_device
*
131 alloc_ioatdma(struct pci_dev
*pdev
, void __iomem
*iobase
)
133 struct device
*dev
= &pdev
->dev
;
134 struct ioatdma_device
*d
= devm_kzalloc(dev
, sizeof(*d
), GFP_KERNEL
);
139 d
->reg_base
= iobase
;
143 static int ioat_pci_probe(struct pci_dev
*pdev
, const struct pci_device_id
*id
)
145 void __iomem
* const *iomap
;
146 struct device
*dev
= &pdev
->dev
;
147 struct ioatdma_device
*device
;
150 err
= pcim_enable_device(pdev
);
154 err
= pcim_iomap_regions(pdev
, 1 << IOAT_MMIO_BAR
, DRV_NAME
);
157 iomap
= pcim_iomap_table(pdev
);
161 err
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(64));
163 err
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(32));
167 err
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(64));
169 err
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(32));
173 device
= alloc_ioatdma(pdev
, iomap
[IOAT_MMIO_BAR
]);
176 pci_set_master(pdev
);
177 pci_set_drvdata(pdev
, device
);
179 device
->version
= readb(device
->reg_base
+ IOAT_VER_OFFSET
);
180 if (device
->version
== IOAT_VER_1_2
)
181 err
= ioat1_dma_probe(device
, ioat_dca_enabled
);
182 else if (device
->version
== IOAT_VER_2_0
)
183 err
= ioat2_dma_probe(device
, ioat_dca_enabled
);
184 else if (device
->version
>= IOAT_VER_3_0
)
185 err
= ioat3_dma_probe(device
, ioat_dca_enabled
);
190 dev_err(dev
, "Intel(R) I/OAT DMA Engine init failed\n");
197 static void ioat_remove(struct pci_dev
*pdev
)
199 struct ioatdma_device
*device
= pci_get_drvdata(pdev
);
204 dev_err(&pdev
->dev
, "Removing dma and dca services\n");
206 unregister_dca_provider(device
->dca
, &pdev
->dev
);
207 free_dca_provider(device
->dca
);
210 ioat_dma_remove(device
);
213 static int __init
ioat_init_module(void)
217 pr_info("%s: Intel(R) QuickData Technology Driver %s\n",
218 DRV_NAME
, IOAT_DMA_VERSION
);
220 ioat2_cache
= kmem_cache_create("ioat2", sizeof(struct ioat_ring_ent
),
221 0, SLAB_HWCACHE_ALIGN
, NULL
);
225 err
= pci_register_driver(&ioat_pci_driver
);
227 kmem_cache_destroy(ioat2_cache
);
231 module_init(ioat_init_module
);
233 static void __exit
ioat_exit_module(void)
235 pci_unregister_driver(&ioat_pci_driver
);
236 kmem_cache_destroy(ioat2_cache
);
238 module_exit(ioat_exit_module
);