Release 4.11 drivers/pci/hotplug/shpchp_core.c

/*
 * Standard Hot Plug Controller Driver
 *
 * Copyright (C) 1995,2001 Compaq Computer Corporation
 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
 * Copyright (C) 2001 IBM Corp.
 * Copyright (C) 2003-2004 Intel Corporation
 *
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
 * NON INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
 *
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include "shpchp.h"

/* Global variables */

bool shpchp_debug;

bool shpchp_poll_mode;

int shpchp_poll_time;


#define DRIVER_VERSION	"0.4"

#define DRIVER_AUTHOR	"Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy <dely.l.sy@intel.com>"

#define DRIVER_DESC	"Standard Hot Plug PCI Controller Driver"


MODULE_AUTHOR(DRIVER_AUTHOR);

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");

module_param(shpchp_debug, bool, 0644);
module_param(shpchp_poll_mode, bool, 0644);
module_param(shpchp_poll_time, int, 0644);
MODULE_PARM_DESC(shpchp_debug, "Debugging mode enabled or not");
MODULE_PARM_DESC(shpchp_poll_mode, "Using polling mechanism for hot-plug events or not");
MODULE_PARM_DESC(shpchp_poll_time, "Polling mechanism frequency, in seconds");


#define SHPC_MODULE_NAME "shpchp"

static int set_attention_status(struct hotplug_slot *slot, u8 value);
static int enable_slot(struct hotplug_slot *slot);
static int disable_slot(struct hotplug_slot *slot);
static int get_power_status(struct hotplug_slot *slot, u8 *value);
static int get_attention_status(struct hotplug_slot *slot, u8 *value);
static int get_latch_status(struct hotplug_slot *slot, u8 *value);
static int get_adapter_status(struct hotplug_slot *slot, u8 *value);


static struct hotplug_slot_ops shpchp_hotplug_slot_ops = {
	.set_attention_status =	set_attention_status,
	.enable_slot =		enable_slot,
	.disable_slot =		disable_slot,
	.get_power_status =	get_power_status,
	.get_attention_status =	get_attention_status,
	.get_latch_status =	get_latch_status,
	.get_adapter_status =	get_adapter_status,
};

/**
 * release_slot - free up the memory used by a slot
 * @hotplug_slot: slot to free
 */


static void release_slot(struct hotplug_slot *hotplug_slot)
{
	struct slot *slot = hotplug_slot->private;

	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
		 __func__, slot_name(slot));

	kfree(slot->hotplug_slot->info);
	kfree(slot->hotplug_slot);
	kfree(slot);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rolf Eike Beer
46
80.70%
1
20.00%
Taku Izumi
6
10.53%
2
40.00%
Alexander Chiang
4
7.02%
1
20.00%
Harvey Harrison
1
1.75%
1
20.00%
Total
57
100.00%
5
100.00%



static int init_slots(struct controller *ctrl)
{
	struct slot *slot;
	struct hotplug_slot *hotplug_slot;
	struct hotplug_slot_info *info;
	char name[SLOT_NAME_SIZE];
	int retval;
	int i;

	for (i = 0; i < ctrl->num_slots; i++) {
		slot = kzalloc(sizeof(*slot), GFP_KERNEL);
		if (!slot) {
			retval = -ENOMEM;
			goto error;
		}

		hotplug_slot = kzalloc(sizeof(*hotplug_slot), GFP_KERNEL);
		if (!hotplug_slot) {
			retval = -ENOMEM;
			goto error_slot;
		}
		slot->hotplug_slot = hotplug_slot;

		info = kzalloc(sizeof(*info), GFP_KERNEL);
		if (!info) {
			retval = -ENOMEM;
			goto error_hpslot;
		}
		hotplug_slot->info = info;

		slot->hp_slot = i;
		slot->ctrl = ctrl;
		slot->bus = ctrl->pci_dev->subordinate->number;
		slot->device = ctrl->slot_device_offset + i;
		slot->hpc_ops = ctrl->hpc_ops;
		slot->number = ctrl->first_slot + (ctrl->slot_num_inc * i);

		slot->wq = alloc_workqueue("shpchp-%d", 0, 0, slot->number);
		if (!slot->wq) {
			retval = -ENOMEM;
			goto error_info;
		}

		mutex_init(&slot->lock);
		INIT_DELAYED_WORK(&slot->work, shpchp_queue_pushbutton_work);

		/* register this slot with the hotplug pci core */
		hotplug_slot->private = slot;
		hotplug_slot->release = &release_slot;
		snprintf(name, SLOT_NAME_SIZE, "%d", slot->number);
		hotplug_slot->ops = &shpchp_hotplug_slot_ops;

		ctrl_dbg(ctrl, "Registering domain:bus:dev=%04x:%02x:%02x hp_slot=%x sun=%x slot_device_offset=%x\n",
			 pci_domain_nr(ctrl->pci_dev->subordinate),
			 slot->bus, slot->device, slot->hp_slot, slot->number,
			 ctrl->slot_device_offset);
		retval = pci_hp_register(slot->hotplug_slot,
				ctrl->pci_dev->subordinate, slot->device, name);
		if (retval) {
			ctrl_err(ctrl, "pci_hp_register failed with error %d\n",
				 retval);
			goto error_slotwq;
		}

		get_power_status(hotplug_slot, &info->power_status);
		get_attention_status(hotplug_slot, &info->attention_status);
		get_latch_status(hotplug_slot, &info->latch_status);
		get_adapter_status(hotplug_slot, &info->adapter_status);

		list_add(&slot->slot_list, &ctrl->slot_list);
	}

	return 0;
error_slotwq:
	destroy_workqueue(slot->wq);
error_info:
	kfree(info);
error_hpslot:
	kfree(hotplug_slot);
error_slot:
	kfree(slot);
error:
	return retval;
}

Contributors
Person
Tokens
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Commits
CommitProp
Dely Sy
155
33.62%
1
4.55%
Kenji Kaneshige
109
23.64%
8
36.36%
Alexander Chiang
72
15.62%
4
18.18%
Rolf Eike Beer
42
9.11%
1
4.55%
Björn Helgaas
39
8.46%
1
4.55%
Julia Lawall
21
4.56%
1
4.55%
Taku Izumi
15
3.25%
2
9.09%
Kees Cook
5
1.08%
1
4.55%
Ryan Desfosses
1
0.22%
1
4.55%
Kristen Carlson Accardi
1
0.22%
1
4.55%
David Howells
1
0.22%
1
4.55%
Total
461
100.00%
22
100.00%



void cleanup_slots(struct controller *ctrl)
{
	struct slot *slot, *next;

	list_for_each_entry_safe(slot, next, &ctrl->slot_list, slot_list) {
		list_del(&slot->slot_list);
		cancel_delayed_work(&slot->work);
		destroy_workqueue(slot->wq);
		pci_hp_deregister(slot->hotplug_slot);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Kenji Kaneshige
27
45.00%
2
28.57%
Dely Sy
19
31.67%
1
14.29%
Geliang Tang
7
11.67%
1
14.29%
Björn Helgaas
4
6.67%
1
14.29%
Rolf Eike Beer
3
5.00%
2
28.57%
Total
60
100.00%
7
100.00%

/*
 * set_attention_status - Turns the Amber LED for a slot on, off or blink
 */


static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
{
	struct slot *slot = get_slot(hotplug_slot);

	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
		 __func__, slot_name(slot));

	hotplug_slot->info->attention_status = status;
	slot->hpc_ops->set_attention_status(slot, status);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dely Sy
51
82.26%
1
20.00%
Taku Izumi
6
9.68%
2
40.00%
Alexander Chiang
4
6.45%
1
20.00%
Harvey Harrison
1
1.61%
1
20.00%
Total
62
100.00%
5
100.00%



static int enable_slot(struct hotplug_slot *hotplug_slot)
{
	struct slot *slot = get_slot(hotplug_slot);

	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
		 __func__, slot_name(slot));

	return shpchp_sysfs_enable_slot(slot);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dely Sy
31
72.09%
1
16.67%
Taku Izumi
6
13.95%
2
33.33%
Alexander Chiang
4
9.30%
1
16.67%
Harvey Harrison
1
2.33%
1
16.67%
Kenji Kaneshige
1
2.33%
1
16.67%
Total
43
100.00%
6
100.00%



static int disable_slot(struct hotplug_slot *hotplug_slot)
{
	struct slot *slot = get_slot(hotplug_slot);

	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
		 __func__, slot_name(slot));

	return shpchp_sysfs_disable_slot(slot);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dely Sy
31
72.09%
1
16.67%
Taku Izumi
6
13.95%
2
33.33%
Alexander Chiang
4
9.30%
1
16.67%
Kenji Kaneshige
1
2.33%
1
16.67%
Harvey Harrison
1
2.33%
1
16.67%
Total
43
100.00%
6
100.00%



static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
	struct slot *slot = get_slot(hotplug_slot);
	int retval;

	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
		 __func__, slot_name(slot));

	retval = slot->hpc_ops->get_power_status(slot, value);
	if (retval < 0)
		*value = hotplug_slot->info->power_status;

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dely Sy
64
85.33%
1
20.00%
Taku Izumi
6
8.00%
2
40.00%
Alexander Chiang
4
5.33%
1
20.00%
Harvey Harrison
1
1.33%
1
20.00%
Total
75
100.00%
5
100.00%



static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
	struct slot *slot = get_slot(hotplug_slot);
	int retval;

	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
		 __func__, slot_name(slot));

	retval = slot->hpc_ops->get_attention_status(slot, value);
	if (retval < 0)
		*value = hotplug_slot->info->attention_status;

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dely Sy
64
85.33%
1
20.00%
Taku Izumi
6
8.00%
2
40.00%
Alexander Chiang
4
5.33%
1
20.00%
Harvey Harrison
1
1.33%
1
20.00%
Total
75
100.00%
5
100.00%



static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
	struct slot *slot = get_slot(hotplug_slot);
	int retval;

	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
		 __func__, slot_name(slot));

	retval = slot->hpc_ops->get_latch_status(slot, value);
	if (retval < 0)
		*value = hotplug_slot->info->latch_status;

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dely Sy
64
85.33%
1
20.00%
Taku Izumi
6
8.00%
2
40.00%
Alexander Chiang
4
5.33%
1
20.00%
Harvey Harrison
1
1.33%
1
20.00%
Total
75
100.00%
5
100.00%



static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
	struct slot *slot = get_slot(hotplug_slot);
	int retval;

	ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n",
		 __func__, slot_name(slot));

	retval = slot->hpc_ops->get_adapter_status(slot, value);
	if (retval < 0)
		*value = hotplug_slot->info->adapter_status;

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dely Sy
63
84.00%
1
16.67%
Taku Izumi
6
8.00%
2
33.33%
Alexander Chiang
4
5.33%
1
16.67%
Harvey Harrison
1
1.33%
1
16.67%
Kenji Kaneshige
1
1.33%
1
16.67%
Total
75
100.00%
6
100.00%



static int is_shpc_capable(struct pci_dev *dev)
{
	if (dev->vendor == PCI_VENDOR_ID_AMD &&
	    dev->device == PCI_DEVICE_ID_AMD_GOLAM_7450)
		return 1;
	if (!pci_find_capability(dev, PCI_CAP_ID_SHPC))
		return 0;
	if (get_hp_hw_control_from_firmware(dev))
		return 0;
	return 1;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rajesh Shah
41
75.93%
1
33.33%
Kenji Kaneshige
12
22.22%
1
33.33%
Björn Helgaas
1
1.85%
1
33.33%
Total
54
100.00%
3
100.00%



static int shpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	int rc;
	struct controller *ctrl;

	if (!is_shpc_capable(pdev))
		return -ENODEV;

	ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL);
	if (!ctrl) {
		dev_err(&pdev->dev, "%s: Out of memory\n", __func__);
		goto err_out_none;
	}
	INIT_LIST_HEAD(&ctrl->slot_list);

	rc = shpc_init(ctrl, pdev);
	if (rc) {
		ctrl_dbg(ctrl, "Controller initialization failed\n");
		goto err_out_free_ctrl;
	}

	pci_set_drvdata(pdev, ctrl);

	/* Setup the slot information structures */
	rc = init_slots(ctrl);
	if (rc) {
		ctrl_err(ctrl, "Slot initialization failed\n");
		goto err_out_release_ctlr;
	}

	rc = shpchp_create_ctrl_files(ctrl);
	if (rc)
		goto err_cleanup_slots;

	return 0;

err_cleanup_slots:
	cleanup_slots(ctrl);
err_out_release_ctlr:
	ctrl->hpc_ops->release_ctlr(ctrl);
err_out_free_ctrl:
	kfree(ctrl);
err_out_none:
	return -ENODEV;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dely Sy
129
70.11%
1
11.11%
Greg Kroah-Hartman
16
8.70%
1
11.11%
Taku Izumi
13
7.07%
2
22.22%
Kenji Kaneshige
13
7.07%
3
33.33%
Rajesh Shah
12
6.52%
1
11.11%
Harvey Harrison
1
0.54%
1
11.11%
Total
184
100.00%
9
100.00%



static void shpc_remove(struct pci_dev *dev)
{
	struct controller *ctrl = pci_get_drvdata(dev);

	shpchp_remove_ctrl_files(ctrl);
	ctrl->hpc_ops->release_ctlr(ctrl);
	kfree(ctrl);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dely Sy
21
52.50%
1
25.00%
Kenji Kaneshige
14
35.00%
2
50.00%
Rajesh Shah
5
12.50%
1
25.00%
Total
40
100.00%
4
100.00%


static struct pci_device_id shpcd_pci_tbl[] = {
	{PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_PCI << 8) | 0x00), ~0)},
	{ /* end: all zeroes */ }
};
MODULE_DEVICE_TABLE(pci, shpcd_pci_tbl);


static struct pci_driver shpc_driver = {
	.name =		SHPC_MODULE_NAME,
	.id_table =	shpcd_pci_tbl,
	.probe =	shpc_probe,
	.remove =	shpc_remove,
};



static int __init shpcd_init(void)
{
	int retval;

	retval = pci_register_driver(&shpc_driver);
	dbg("%s: pci_register_driver = %d\n", __func__, retval);
	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");

	return retval;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dely Sy
37
92.50%
1
33.33%
Greg Kroah-Hartman
2
5.00%
1
33.33%
Harvey Harrison
1
2.50%
1
33.33%
Total
40
100.00%
3
100.00%



static void __exit shpcd_cleanup(void)
{
	dbg("unload_shpchpd()\n");
	pci_unregister_driver(&shpc_driver);
	info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n");
}

Contributors
Person
Tokens
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Dely Sy
28
100.00%
1
100.00%
Total
28
100.00%
1
100.00%


module_init(shpcd_init);

module_exit(shpcd_cleanup);
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Dely Sy
1035
61.39%
1
2.44%
Kenji Kaneshige
192
11.39%
13
31.71%
Rolf Eike Beer
104
6.17%
4
9.76%
Alexander Chiang
104
6.17%
4
9.76%
Taku Izumi
76
4.51%
2
4.88%
Rajesh Shah
58
3.44%
2
4.88%
Björn Helgaas
44
2.61%
2
4.88%
Julia Lawall
21
1.25%
1
2.44%
Greg Kroah-Hartman
18
1.07%
2
4.88%
Harvey Harrison
10
0.59%
1
2.44%
Geliang Tang
7
0.42%
1
2.44%
Kees Cook
5
0.30%
1
2.44%
Rusty Russell
5
0.30%
2
4.88%
Tejun Heo
3
0.18%
1
2.44%
Kristen Carlson Accardi
2
0.12%
2
4.88%
Ryan Desfosses
1
0.06%
1
2.44%
David Howells
1
0.06%
1
2.44%
Total
1686
100.00%
41
100.00%
Directory: drivers/pci/hotplug

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