tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Intel MIC Host Driver for X100 family.
This patch enables the following:
a) Initializes the Intel MIC X100 PCIe devices.
b) Provides sysfs entries for family and stepping information.
Co-author: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Caz Yokoyama <Caz.Yokoyama@intel.com>
Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com>
Signed-off-by: Harshavardhan R Kharche <harshavardhan.r.kharche@intel.com>
Signed-off-by: Nikhil Rao <nikhil.rao@intel.com>
Signed-off-by: Sudeep Dutt <sudeep.dutt@intel.com>
Acked-by: Yaozu (Eddie) Dong <eddie.dong@intel.com>
Reviewed-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
authored by
Sudeep Dutt
and committed by
Greg Kroah-Hartman
b170d8ce
9089e3be
+742
+34
Documentation/ABI/testing/sysfs-class-mic.txt
+34
Documentation/ABI/testing/sysfs-class-mic.txt
···
1
+
What: /sys/class/mic/
2
+
Date: August 2013
3
+
KernelVersion: 3.11
4
+
Contact: Sudeep Dutt <sudeep.dutt@intel.com>
5
+
Description:
6
+
The mic class directory belongs to Intel MIC devices and
7
+
provides information per MIC device. An Intel MIC device is a
8
+
PCIe form factor add-in Coprocessor card based on the Intel Many
9
+
Integrated Core (MIC) architecture that runs a Linux OS.
10
+
11
+
What: /sys/class/mic/mic(x)
12
+
Date: August 2013
13
+
KernelVersion: 3.11
14
+
Contact: Sudeep Dutt <sudeep.dutt@intel.com>
15
+
Description:
16
+
The directories /sys/class/mic/mic0, /sys/class/mic/mic1 etc.,
17
+
represent MIC devices (0,1,..etc). Each directory has
18
+
information specific to that MIC device.
19
+
20
+
What: /sys/class/mic/mic(x)/family
21
+
Date: August 2013
22
+
KernelVersion: 3.11
23
+
Contact: Sudeep Dutt <sudeep.dutt@intel.com>
24
+
Description:
25
+
Provides information about the Coprocessor family for an Intel
26
+
MIC device. For example - "x100"
27
+
28
+
What: /sys/class/mic/mic(x)/stepping
29
+
Date: August 2013
30
+
KernelVersion: 3.11
31
+
Contact: Sudeep Dutt <sudeep.dutt@intel.com>
32
+
Description:
33
+
Provides information about the silicon stepping for an Intel
34
+
MIC device. For example - "A0" or "B0"
+1
drivers/misc/Kconfig
+1
drivers/misc/Kconfig
+1
drivers/misc/Makefile
+1
drivers/misc/Makefile
+19
drivers/misc/mic/Kconfig
+19
drivers/misc/mic/Kconfig
···
1
+
comment "Intel MIC Host Driver"
2
+
3
+
config INTEL_MIC_HOST
4
+
tristate "Intel MIC Host Driver"
5
+
depends on 64BIT && PCI
6
+
default N
7
+
help
8
+
This enables Host Driver support for the Intel Many Integrated
9
+
Core (MIC) family of PCIe form factor coprocessor devices that
10
+
run a 64 bit Linux OS. The driver manages card OS state and
11
+
enables communication between host and card. Intel MIC X100
12
+
devices are currently supported.
13
+
14
+
If you are building a host kernel with an Intel MIC device then
15
+
say M (recommended) or Y, else say N. If unsure say N.
16
+
17
+
More information about the Intel MIC family as well as the Linux
18
+
OS and tools for MIC to use with this driver are available from
19
+
<http://software.intel.com/en-us/mic-developer>.
+5
drivers/misc/mic/Makefile
+5
drivers/misc/mic/Makefile
+37
drivers/misc/mic/common/mic_device.h
+37
drivers/misc/mic/common/mic_device.h
···
1
+
/*
2
+
* Intel MIC Platform Software Stack (MPSS)
3
+
*
4
+
* Copyright(c) 2013 Intel Corporation.
5
+
*
6
+
* This program is free software; you can redistribute it and/or modify
7
+
* it under the terms of the GNU General Public License, version 2, as
8
+
* published by the Free Software Foundation.
9
+
*
10
+
* This program is distributed in the hope that it will be useful, but
11
+
* WITHOUT ANY WARRANTY; without even the implied warranty of
12
+
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13
+
* General Public License for more details.
14
+
*
15
+
* The full GNU General Public License is included in this distribution in
16
+
* the file called "COPYING".
17
+
*
18
+
* Intel MIC driver.
19
+
*
20
+
*/
21
+
#ifndef __MIC_COMMON_DEVICE_H_
22
+
#define __MIC_COMMON_DEVICE_H_
23
+
24
+
/**
25
+
* struct mic_mw - MIC memory window
26
+
*
27
+
* @pa: Base physical address.
28
+
* @va: Base ioremap'd virtual address.
29
+
* @len: Size of the memory window.
30
+
*/
31
+
struct mic_mw {
32
+
phys_addr_t pa;
33
+
void __iomem *va;
34
+
resource_size_t len;
35
+
};
36
+
37
+
#endif
+8
drivers/misc/mic/host/Makefile
+8
drivers/misc/mic/host/Makefile
+109
drivers/misc/mic/host/mic_device.h
+109
drivers/misc/mic/host/mic_device.h
···
1
+
/*
2
+
* Intel MIC Platform Software Stack (MPSS)
3
+
*
4
+
* Copyright(c) 2013 Intel Corporation.
5
+
*
6
+
* This program is free software; you can redistribute it and/or modify
7
+
* it under the terms of the GNU General Public License, version 2, as
8
+
* published by the Free Software Foundation.
9
+
*
10
+
* This program is distributed in the hope that it will be useful, but
11
+
* WITHOUT ANY WARRANTY; without even the implied warranty of
12
+
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13
+
* General Public License for more details.
14
+
*
15
+
* The full GNU General Public License is included in this distribution in
16
+
* the file called "COPYING".
17
+
*
18
+
* Intel MIC Host driver.
19
+
*
20
+
*/
21
+
#ifndef _MIC_DEVICE_H_
22
+
#define _MIC_DEVICE_H_
23
+
24
+
/* The maximum number of MIC devices supported in a single host system. */
25
+
#define MIC_MAX_NUM_DEVS 256
26
+
27
+
/**
28
+
* enum mic_hw_family - The hardware family to which a device belongs.
29
+
*/
30
+
enum mic_hw_family {
31
+
MIC_FAMILY_X100 = 0,
32
+
MIC_FAMILY_UNKNOWN
33
+
};
34
+
35
+
/**
36
+
* enum mic_stepping - MIC stepping ids.
37
+
*/
38
+
enum mic_stepping {
39
+
MIC_A0_STEP = 0x0,
40
+
MIC_B0_STEP = 0x10,
41
+
MIC_B1_STEP = 0x11,
42
+
MIC_C0_STEP = 0x20,
43
+
};
44
+
45
+
/**
46
+
* struct mic_device - MIC device information for each card.
47
+
*
48
+
* @mmio: MMIO bar information.
49
+
* @aper: Aperture bar information.
50
+
* @family: The MIC family to which this device belongs.
51
+
* @ops: MIC HW specific operations.
52
+
* @id: The unique device id for this MIC device.
53
+
* @stepping: Stepping ID.
54
+
* @attr_group: Pointer to list of sysfs attribute groups.
55
+
* @sdev: Device for sysfs entries.
56
+
*/
57
+
struct mic_device {
58
+
struct mic_mw mmio;
59
+
struct mic_mw aper;
60
+
enum mic_hw_family family;
61
+
struct mic_hw_ops *ops;
62
+
int id;
63
+
enum mic_stepping stepping;
64
+
const struct attribute_group **attr_group;
65
+
struct device *sdev;
66
+
};
67
+
68
+
/**
69
+
* struct mic_hw_ops - MIC HW specific operations.
70
+
* @aper_bar: Aperture bar resource number.
71
+
* @mmio_bar: MMIO bar resource number.
72
+
* @read_spad: Read from scratch pad register.
73
+
* @write_spad: Write to scratch pad register.
74
+
*/
75
+
struct mic_hw_ops {
76
+
u8 aper_bar;
77
+
u8 mmio_bar;
78
+
u32 (*read_spad)(struct mic_device *mdev, unsigned int idx);
79
+
void (*write_spad)(struct mic_device *mdev, unsigned int idx, u32 val);
80
+
};
81
+
82
+
/**
83
+
* mic_mmio_read - read from an MMIO register.
84
+
* @mw: MMIO register base virtual address.
85
+
* @offset: register offset.
86
+
*
87
+
* RETURNS: register value.
88
+
*/
89
+
static inline u32 mic_mmio_read(struct mic_mw *mw, u32 offset)
90
+
{
91
+
return ioread32(mw->va + offset);
92
+
}
93
+
94
+
/**
95
+
* mic_mmio_write - write to an MMIO register.
96
+
* @mw: MMIO register base virtual address.
97
+
* @val: the data value to put into the register
98
+
* @offset: register offset.
99
+
*
100
+
* RETURNS: none.
101
+
*/
102
+
static inline void
103
+
mic_mmio_write(struct mic_mw *mw, u32 val, u32 offset)
104
+
{
105
+
iowrite32(val, mw->va + offset);
106
+
}
107
+
108
+
void mic_sysfs_init(struct mic_device *mdev);
109
+
#endif
+309
drivers/misc/mic/host/mic_main.c
+309
drivers/misc/mic/host/mic_main.c
···
1
+
/*
2
+
* Intel MIC Platform Software Stack (MPSS)
3
+
*
4
+
* Copyright(c) 2013 Intel Corporation.
5
+
*
6
+
* This program is free software; you can redistribute it and/or modify
7
+
* it under the terms of the GNU General Public License, version 2, as
8
+
* published by the Free Software Foundation.
9
+
*
10
+
* This program is distributed in the hope that it will be useful, but
11
+
* WITHOUT ANY WARRANTY; without even the implied warranty of
12
+
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13
+
* General Public License for more details.
14
+
*
15
+
* The full GNU General Public License is included in this distribution in
16
+
* the file called "COPYING".
17
+
*
18
+
* Intel MIC Host driver.
19
+
*
20
+
* Global TODO's across the driver to be added after initial base
21
+
* patches are accepted upstream:
22
+
* 1) Enable DMA support.
23
+
* 2) Enable per vring interrupt support.
24
+
*/
25
+
#include <linux/fs.h>
26
+
#include <linux/idr.h>
27
+
#include <linux/module.h>
28
+
#include <linux/pci.h>
29
+
30
+
#include "../common/mic_device.h"
31
+
#include "mic_device.h"
32
+
#include "mic_x100.h"
33
+
34
+
static const char mic_driver_name[] = "mic";
35
+
36
+
static DEFINE_PCI_DEVICE_TABLE(mic_pci_tbl) = {
37
+
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2250)},
38
+
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2251)},
39
+
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2252)},
40
+
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2253)},
41
+
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2254)},
42
+
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2255)},
43
+
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2256)},
44
+
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2257)},
45
+
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2258)},
46
+
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_2259)},
47
+
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225a)},
48
+
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225b)},
49
+
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225c)},
50
+
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225d)},
51
+
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MIC_X100_PCI_DEVICE_225e)},
52
+
53
+
/* required last entry */
54
+
{ 0, }
55
+
};
56
+
57
+
MODULE_DEVICE_TABLE(pci, mic_pci_tbl);
58
+
59
+
/* ID allocator for MIC devices */
60
+
static struct ida g_mic_ida;
61
+
/* Class of MIC devices for sysfs accessibility. */
62
+
static struct class *g_mic_class;
63
+
/* Base device node number for MIC devices */
64
+
static dev_t g_mic_devno;
65
+
66
+
/**
67
+
* mic_ops_init: Initialize HW specific operation tables.
68
+
*
69
+
* @mdev: pointer to mic_device instance
70
+
*
71
+
* returns none.
72
+
*/
73
+
static void mic_ops_init(struct mic_device *mdev)
74
+
{
75
+
switch (mdev->family) {
76
+
case MIC_FAMILY_X100:
77
+
mdev->ops = &mic_x100_ops;
78
+
break;
79
+
default:
80
+
break;
81
+
}
82
+
}
83
+
84
+
/**
85
+
* mic_get_family - Determine hardware family to which this MIC belongs.
86
+
*
87
+
* @pdev: The pci device structure
88
+
*
89
+
* returns family.
90
+
*/
91
+
static enum mic_hw_family mic_get_family(struct pci_dev *pdev)
92
+
{
93
+
enum mic_hw_family family;
94
+
95
+
switch (pdev->device) {
96
+
case MIC_X100_PCI_DEVICE_2250:
97
+
case MIC_X100_PCI_DEVICE_2251:
98
+
case MIC_X100_PCI_DEVICE_2252:
99
+
case MIC_X100_PCI_DEVICE_2253:
100
+
case MIC_X100_PCI_DEVICE_2254:
101
+
case MIC_X100_PCI_DEVICE_2255:
102
+
case MIC_X100_PCI_DEVICE_2256:
103
+
case MIC_X100_PCI_DEVICE_2257:
104
+
case MIC_X100_PCI_DEVICE_2258:
105
+
case MIC_X100_PCI_DEVICE_2259:
106
+
case MIC_X100_PCI_DEVICE_225a:
107
+
case MIC_X100_PCI_DEVICE_225b:
108
+
case MIC_X100_PCI_DEVICE_225c:
109
+
case MIC_X100_PCI_DEVICE_225d:
110
+
case MIC_X100_PCI_DEVICE_225e:
111
+
family = MIC_FAMILY_X100;
112
+
break;
113
+
default:
114
+
family = MIC_FAMILY_UNKNOWN;
115
+
break;
116
+
}
117
+
return family;
118
+
}
119
+
120
+
/**
121
+
* mic_device_init - Allocates and initializes the MIC device structure
122
+
*
123
+
* @mdev: pointer to mic_device instance
124
+
* @pdev: The pci device structure
125
+
*
126
+
* returns none.
127
+
*/
128
+
static void
129
+
mic_device_init(struct mic_device *mdev, struct pci_dev *pdev)
130
+
{
131
+
mdev->family = mic_get_family(pdev);
132
+
mdev->stepping = pdev->revision;
133
+
mic_ops_init(mdev);
134
+
mic_sysfs_init(mdev);
135
+
}
136
+
137
+
/**
138
+
* mic_probe - Device Initialization Routine
139
+
*
140
+
* @pdev: PCI device structure
141
+
* @ent: entry in mic_pci_tbl
142
+
*
143
+
* returns 0 on success, < 0 on failure.
144
+
*/
145
+
static int mic_probe(struct pci_dev *pdev,
146
+
const struct pci_device_id *ent)
147
+
{
148
+
int rc;
149
+
struct mic_device *mdev;
150
+
151
+
mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
152
+
if (!mdev) {
153
+
rc = -ENOMEM;
154
+
dev_err(&pdev->dev, "mdev kmalloc failed rc %d\n", rc);
155
+
goto mdev_alloc_fail;
156
+
}
157
+
mdev->id = ida_simple_get(&g_mic_ida, 0, MIC_MAX_NUM_DEVS, GFP_KERNEL);
158
+
if (mdev->id < 0) {
159
+
rc = mdev->id;
160
+
dev_err(&pdev->dev, "ida_simple_get failed rc %d\n", rc);
161
+
goto ida_fail;
162
+
}
163
+
164
+
mic_device_init(mdev, pdev);
165
+
166
+
rc = pci_enable_device(pdev);
167
+
if (rc) {
168
+
dev_err(&pdev->dev, "failed to enable pci device.\n");
169
+
goto ida_remove;
170
+
}
171
+
172
+
pci_set_master(pdev);
173
+
174
+
rc = pci_request_regions(pdev, mic_driver_name);
175
+
if (rc) {
176
+
dev_err(&pdev->dev, "failed to get pci regions.\n");
177
+
goto disable_device;
178
+
}
179
+
180
+
rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
181
+
if (rc) {
182
+
dev_err(&pdev->dev, "Cannot set DMA mask\n");
183
+
goto release_regions;
184
+
}
185
+
186
+
mdev->mmio.pa = pci_resource_start(pdev, mdev->ops->mmio_bar);
187
+
mdev->mmio.len = pci_resource_len(pdev, mdev->ops->mmio_bar);
188
+
mdev->mmio.va = pci_ioremap_bar(pdev, mdev->ops->mmio_bar);
189
+
if (!mdev->mmio.va) {
190
+
dev_err(&pdev->dev, "Cannot remap MMIO BAR\n");
191
+
rc = -EIO;
192
+
goto release_regions;
193
+
}
194
+
195
+
mdev->aper.pa = pci_resource_start(pdev, mdev->ops->aper_bar);
196
+
mdev->aper.len = pci_resource_len(pdev, mdev->ops->aper_bar);
197
+
mdev->aper.va = ioremap_wc(mdev->aper.pa, mdev->aper.len);
198
+
if (!mdev->aper.va) {
199
+
dev_err(&pdev->dev, "Cannot remap Aperture BAR\n");
200
+
rc = -EIO;
201
+
goto unmap_mmio;
202
+
}
203
+
204
+
pci_set_drvdata(pdev, mdev);
205
+
206
+
mdev->sdev = device_create_with_groups(g_mic_class, &pdev->dev,
207
+
MKDEV(MAJOR(g_mic_devno), mdev->id), NULL,
208
+
mdev->attr_group, "mic%d", mdev->id);
209
+
if (IS_ERR(mdev->sdev)) {
210
+
rc = PTR_ERR(mdev->sdev);
211
+
dev_err(&pdev->dev,
212
+
"device_create_with_groups failed rc %d\n", rc);
213
+
goto unmap_aper;
214
+
}
215
+
return 0;
216
+
unmap_aper:
217
+
iounmap(mdev->aper.va);
218
+
unmap_mmio:
219
+
iounmap(mdev->mmio.va);
220
+
release_regions:
221
+
pci_release_regions(pdev);
222
+
disable_device:
223
+
pci_disable_device(pdev);
224
+
ida_remove:
225
+
ida_simple_remove(&g_mic_ida, mdev->id);
226
+
ida_fail:
227
+
kfree(mdev);
228
+
mdev_alloc_fail:
229
+
dev_err(&pdev->dev, "Probe failed rc %d\n", rc);
230
+
return rc;
231
+
}
232
+
233
+
/**
234
+
* mic_remove - Device Removal Routine
235
+
* mic_remove is called by the PCI subsystem to alert the driver
236
+
* that it should release a PCI device.
237
+
*
238
+
* @pdev: PCI device structure
239
+
*/
240
+
static void mic_remove(struct pci_dev *pdev)
241
+
{
242
+
struct mic_device *mdev;
243
+
244
+
mdev = pci_get_drvdata(pdev);
245
+
if (!mdev)
246
+
return;
247
+
248
+
device_destroy(g_mic_class, MKDEV(MAJOR(g_mic_devno), mdev->id));
249
+
iounmap(mdev->mmio.va);
250
+
iounmap(mdev->aper.va);
251
+
pci_release_regions(pdev);
252
+
pci_disable_device(pdev);
253
+
ida_simple_remove(&g_mic_ida, mdev->id);
254
+
kfree(mdev);
255
+
}
256
+
static struct pci_driver mic_driver = {
257
+
.name = mic_driver_name,
258
+
.id_table = mic_pci_tbl,
259
+
.probe = mic_probe,
260
+
.remove = mic_remove
261
+
};
262
+
263
+
static int __init mic_init(void)
264
+
{
265
+
int ret;
266
+
267
+
ret = alloc_chrdev_region(&g_mic_devno, 0,
268
+
MIC_MAX_NUM_DEVS, mic_driver_name);
269
+
if (ret) {
270
+
pr_err("alloc_chrdev_region failed ret %d\n", ret);
271
+
goto error;
272
+
}
273
+
274
+
g_mic_class = class_create(THIS_MODULE, mic_driver_name);
275
+
if (IS_ERR(g_mic_class)) {
276
+
ret = PTR_ERR(g_mic_class);
277
+
pr_err("class_create failed ret %d\n", ret);
278
+
goto cleanup_chrdev;
279
+
}
280
+
281
+
ida_init(&g_mic_ida);
282
+
ret = pci_register_driver(&mic_driver);
283
+
if (ret) {
284
+
pr_err("pci_register_driver failed ret %d\n", ret);
285
+
goto class_destroy;
286
+
}
287
+
return ret;
288
+
class_destroy:
289
+
class_destroy(g_mic_class);
290
+
cleanup_chrdev:
291
+
unregister_chrdev_region(g_mic_devno, MIC_MAX_NUM_DEVS);
292
+
error:
293
+
return ret;
294
+
}
295
+
296
+
static void __exit mic_exit(void)
297
+
{
298
+
pci_unregister_driver(&mic_driver);
299
+
ida_destroy(&g_mic_ida);
300
+
class_destroy(g_mic_class);
301
+
unregister_chrdev_region(g_mic_devno, MIC_MAX_NUM_DEVS);
302
+
}
303
+
304
+
module_init(mic_init);
305
+
module_exit(mic_exit);
306
+
307
+
MODULE_AUTHOR("Intel Corporation");
308
+
MODULE_DESCRIPTION("Intel(R) MIC X100 Host driver");
309
+
MODULE_LICENSE("GPL v2");
+97
drivers/misc/mic/host/mic_sysfs.c
+97
drivers/misc/mic/host/mic_sysfs.c
···
1
+
/*
2
+
* Intel MIC Platform Software Stack (MPSS)
3
+
*
4
+
* Copyright(c) 2013 Intel Corporation.
5
+
*
6
+
* This program is free software; you can redistribute it and/or modify
7
+
* it under the terms of the GNU General Public License, version 2, as
8
+
* published by the Free Software Foundation.
9
+
*
10
+
* This program is distributed in the hope that it will be useful, but
11
+
* WITHOUT ANY WARRANTY; without even the implied warranty of
12
+
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13
+
* General Public License for more details.
14
+
*
15
+
* The full GNU General Public License is included in this distribution in
16
+
* the file called "COPYING".
17
+
*
18
+
* Intel MIC Host driver.
19
+
*
20
+
*/
21
+
#include <linux/pci.h>
22
+
23
+
#include "../common/mic_device.h"
24
+
#include "mic_device.h"
25
+
26
+
static ssize_t
27
+
mic_show_family(struct device *dev, struct device_attribute *attr, char *buf)
28
+
{
29
+
static const char x100[] = "x100";
30
+
static const char unknown[] = "Unknown";
31
+
const char *card = NULL;
32
+
struct mic_device *mdev = dev_get_drvdata(dev->parent);
33
+
34
+
if (!mdev)
35
+
return -EINVAL;
36
+
37
+
switch (mdev->family) {
38
+
case MIC_FAMILY_X100:
39
+
card = x100;
40
+
break;
41
+
default:
42
+
card = unknown;
43
+
break;
44
+
}
45
+
return scnprintf(buf, PAGE_SIZE, "%s\n", card);
46
+
}
47
+
static DEVICE_ATTR(family, S_IRUGO, mic_show_family, NULL);
48
+
49
+
static ssize_t
50
+
mic_show_stepping(struct device *dev, struct device_attribute *attr, char *buf)
51
+
{
52
+
struct mic_device *mdev = dev_get_drvdata(dev->parent);
53
+
char *string = "??";
54
+
55
+
if (!mdev)
56
+
return -EINVAL;
57
+
58
+
switch (mdev->stepping) {
59
+
case MIC_A0_STEP:
60
+
string = "A0";
61
+
break;
62
+
case MIC_B0_STEP:
63
+
string = "B0";
64
+
break;
65
+
case MIC_B1_STEP:
66
+
string = "B1";
67
+
break;
68
+
case MIC_C0_STEP:
69
+
string = "C0";
70
+
break;
71
+
default:
72
+
break;
73
+
}
74
+
return scnprintf(buf, PAGE_SIZE, "%s\n", string);
75
+
}
76
+
static DEVICE_ATTR(stepping, S_IRUGO, mic_show_stepping, NULL);
77
+
78
+
static struct attribute *mic_default_attrs[] = {
79
+
&dev_attr_family.attr,
80
+
&dev_attr_stepping.attr,
81
+
82
+
NULL
83
+
};
84
+
85
+
static struct attribute_group mic_attr_group = {
86
+
.attrs = mic_default_attrs,
87
+
};
88
+
89
+
static const struct attribute_group *__mic_attr_group[] = {
90
+
&mic_attr_group,
91
+
NULL
92
+
};
93
+
94
+
void mic_sysfs_init(struct mic_device *mdev)
95
+
{
96
+
mdev->attr_group = __mic_attr_group;
97
+
}
+75
drivers/misc/mic/host/mic_x100.c
+75
drivers/misc/mic/host/mic_x100.c
···
1
+
/*
2
+
* Intel MIC Platform Software Stack (MPSS)
3
+
*
4
+
* Copyright(c) 2013 Intel Corporation.
5
+
*
6
+
* This program is free software; you can redistribute it and/or modify
7
+
* it under the terms of the GNU General Public License, version 2, as
8
+
* published by the Free Software Foundation.
9
+
*
10
+
* This program is distributed in the hope that it will be useful, but
11
+
* WITHOUT ANY WARRANTY; without even the implied warranty of
12
+
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13
+
* General Public License for more details.
14
+
*
15
+
* The full GNU General Public License is included in this distribution in
16
+
* the file called "COPYING".
17
+
*
18
+
* Intel MIC Host driver.
19
+
*
20
+
*/
21
+
#include <linux/fs.h>
22
+
#include <linux/pci.h>
23
+
24
+
#include "../common/mic_device.h"
25
+
#include "mic_device.h"
26
+
#include "mic_x100.h"
27
+
28
+
/**
29
+
* mic_x100_write_spad - write to the scratchpad register
30
+
* @mdev: pointer to mic_device instance
31
+
* @idx: index to the scratchpad register, 0 based
32
+
* @val: the data value to put into the register
33
+
*
34
+
* This function allows writing of a 32bit value to the indexed scratchpad
35
+
* register.
36
+
*
37
+
* RETURNS: none.
38
+
*/
39
+
static void
40
+
mic_x100_write_spad(struct mic_device *mdev, unsigned int idx, u32 val)
41
+
{
42
+
dev_dbg(mdev->sdev->parent, "Writing 0x%x to scratch pad index %d\n",
43
+
val, idx);
44
+
mic_mmio_write(&mdev->mmio, val,
45
+
MIC_X100_SBOX_BASE_ADDRESS +
46
+
MIC_X100_SBOX_SPAD0 + idx * 4);
47
+
}
48
+
49
+
/**
50
+
* mic_x100_read_spad - read from the scratchpad register
51
+
* @mdev: pointer to mic_device instance
52
+
* @idx: index to scratchpad register, 0 based
53
+
*
54
+
* This function allows reading of the 32bit scratchpad register.
55
+
*
56
+
* RETURNS: An appropriate -ERRNO error value on error, or zero for success.
57
+
*/
58
+
static u32
59
+
mic_x100_read_spad(struct mic_device *mdev, unsigned int idx)
60
+
{
61
+
u32 val = mic_mmio_read(&mdev->mmio,
62
+
MIC_X100_SBOX_BASE_ADDRESS +
63
+
MIC_X100_SBOX_SPAD0 + idx * 4);
64
+
65
+
dev_dbg(mdev->sdev->parent,
66
+
"Reading 0x%x from scratch pad index %d\n", val, idx);
67
+
return val;
68
+
}
69
+
70
+
struct mic_hw_ops mic_x100_ops = {
71
+
.aper_bar = MIC_X100_APER_BAR,
72
+
.mmio_bar = MIC_X100_MMIO_BAR,
73
+
.read_spad = mic_x100_read_spad,
74
+
.write_spad = mic_x100_write_spad,
75
+
};
+47
drivers/misc/mic/host/mic_x100.h
+47
drivers/misc/mic/host/mic_x100.h
···
1
+
/*
2
+
* Intel MIC Platform Software Stack (MPSS)
3
+
*
4
+
* Copyright(c) 2013 Intel Corporation.
5
+
*
6
+
* This program is free software; you can redistribute it and/or modify
7
+
* it under the terms of the GNU General Public License, version 2, as
8
+
* published by the Free Software Foundation.
9
+
*
10
+
* This program is distributed in the hope that it will be useful, but
11
+
* WITHOUT ANY WARRANTY; without even the implied warranty of
12
+
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13
+
* General Public License for more details.
14
+
*
15
+
* The full GNU General Public License is included in this distribution in
16
+
* the file called "COPYING".
17
+
*
18
+
* Intel MIC Host driver.
19
+
*
20
+
*/
21
+
#ifndef _MIC_X100_HW_H_
22
+
#define _MIC_X100_HW_H_
23
+
24
+
#define MIC_X100_PCI_DEVICE_2250 0x2250
25
+
#define MIC_X100_PCI_DEVICE_2251 0x2251
26
+
#define MIC_X100_PCI_DEVICE_2252 0x2252
27
+
#define MIC_X100_PCI_DEVICE_2253 0x2253
28
+
#define MIC_X100_PCI_DEVICE_2254 0x2254
29
+
#define MIC_X100_PCI_DEVICE_2255 0x2255
30
+
#define MIC_X100_PCI_DEVICE_2256 0x2256
31
+
#define MIC_X100_PCI_DEVICE_2257 0x2257
32
+
#define MIC_X100_PCI_DEVICE_2258 0x2258
33
+
#define MIC_X100_PCI_DEVICE_2259 0x2259
34
+
#define MIC_X100_PCI_DEVICE_225a 0x225a
35
+
#define MIC_X100_PCI_DEVICE_225b 0x225b
36
+
#define MIC_X100_PCI_DEVICE_225c 0x225c
37
+
#define MIC_X100_PCI_DEVICE_225d 0x225d
38
+
#define MIC_X100_PCI_DEVICE_225e 0x225e
39
+
40
+
#define MIC_X100_APER_BAR 0
41
+
#define MIC_X100_MMIO_BAR 4
42
+
43
+
#define MIC_X100_SBOX_BASE_ADDRESS 0x00010000
44
+
#define MIC_X100_SBOX_SPAD0 0x0000AB20
45
+
extern struct mic_hw_ops mic_x100_ops;
46
+
47
+
#endif