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misc: mic: Remove COSM functionality from the MIC card driver

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Since card side COSM functionality, to trigger MIC device shutdowns
and communicate shutdown status to the host, is now moved into a
separate COSM client driver, this patch removes this functionality
from the base MIC card driver. The mic_bus driver is also updated to
use the device index provided by COSM rather than maintain its own
device index.

Reviewed-by: Nikhil Rao <nikhil.rao@intel.com>
Reviewed-by: Sudeep Dutt <sudeep.dutt@intel.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ashutosh Dixit 2015-09-29 18:13:54 -07:00 committed by Greg Kroah-Hartman
parent 1da2b3eeef
commit d411e79391
5 changed files with 23 additions and 105 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/misc/mic/bus/mic_bus.c
View File

@ -25,9 +25,6 @@
#include <linux/idr.h>
#include <linux/mic_bus.h>
/* Unique numbering for mbus devices. */
static DEFINE_IDA(mbus_index_ida);
static ssize_t device_show(struct device *d,
struct device_attribute *attr, char *buf)
{
@ -147,7 +144,8 @@ static void mbus_release_dev(struct device *d)
struct mbus_device *
mbus_register_device(struct device *pdev, int id, struct dma_map_ops *dma_ops,
struct mbus_hw_ops *hw_ops, void __iomem *mmio_va)
struct mbus_hw_ops *hw_ops, int index,
void __iomem *mmio_va)
{
int ret;
struct mbus_device *mbdev;
@ -166,13 +164,7 @@ mbus_register_device(struct device *pdev, int id, struct dma_map_ops *dma_ops,
mbdev->dev.release = mbus_release_dev;
mbdev->hw_ops = hw_ops;
mbdev->dev.bus = &mic_bus;
/* Assign a unique device index and hence name. */
ret = ida_simple_get(&mbus_index_ida, 0, 0, GFP_KERNEL);
if (ret < 0)
goto free_mbdev;
mbdev->index = ret;
mbdev->index = index;
dev_set_name(&mbdev->dev, "mbus-dev%u", mbdev->index);
/*
* device_register() causes the bus infrastructure to look for a
@ -180,10 +172,8 @@ mbus_register_device(struct device *pdev, int id, struct dma_map_ops *dma_ops,
*/
ret = device_register(&mbdev->dev);
if (ret)
goto ida_remove;
goto free_mbdev;
return mbdev;
ida_remove:
ida_simple_remove(&mbus_index_ida, mbdev->index);
free_mbdev:
kfree(mbdev);
return ERR_PTR(ret);
@ -192,10 +182,7 @@ EXPORT_SYMBOL_GPL(mbus_register_device);
void mbus_unregister_device(struct mbus_device *mbdev)
{
int index = mbdev->index; /* save for after device release */
device_unregister(&mbdev->dev);
ida_simple_remove(&mbus_index_ida, index);
}
EXPORT_SYMBOL_GPL(mbus_unregister_device);
@ -207,7 +194,6 @@ static int __init mbus_init(void)
static void __exit mbus_exit(void)
{
bus_unregister(&mic_bus);
ida_destroy(&mbus_index_ida);
}
core_initcall(mbus_init);

88
drivers/misc/mic/card/mic_device.c
View File

@ -37,71 +37,6 @@
#include "mic_virtio.h"
static struct mic_driver *g_drv;
static struct mic_irq *shutdown_cookie;
static void mic_notify_host(u8 state)
{
struct mic_driver *mdrv = g_drv;
struct mic_bootparam __iomem *bootparam = mdrv->dp;
iowrite8(state, &bootparam->shutdown_status);
dev_dbg(mdrv->dev, "%s %d system_state %d\n",
__func__, __LINE__, state);
mic_send_intr(&mdrv->mdev, ioread8(&bootparam->c2h_shutdown_db));
}
static int mic_panic_event(struct notifier_block *this, unsigned long event,
void *ptr)
{
struct mic_driver *mdrv = g_drv;
struct mic_bootparam __iomem *bootparam = mdrv->dp;
iowrite8(-1, &bootparam->h2c_config_db);
iowrite8(-1, &bootparam->h2c_shutdown_db);
mic_notify_host(MIC_CRASHED);
return NOTIFY_DONE;
}
static struct notifier_block mic_panic = {
.notifier_call = mic_panic_event,
};
static irqreturn_t mic_shutdown_isr(int irq, void *data)
{
struct mic_driver *mdrv = g_drv;
struct mic_bootparam __iomem *bootparam = mdrv->dp;
mic_ack_interrupt(&g_drv->mdev);
if (ioread8(&bootparam->shutdown_card))
orderly_poweroff(true);
return IRQ_HANDLED;
}
static int mic_shutdown_init(void)
{
int rc = 0;
struct mic_driver *mdrv = g_drv;
struct mic_bootparam __iomem *bootparam = mdrv->dp;
int shutdown_db;
shutdown_db = mic_next_card_db();
shutdown_cookie = mic_request_card_irq(mic_shutdown_isr, NULL,
"Shutdown", mdrv, shutdown_db);
if (IS_ERR(shutdown_cookie))
rc = PTR_ERR(shutdown_cookie);
else
iowrite8(shutdown_db, &bootparam->h2c_shutdown_db);
return rc;
}
static void mic_shutdown_uninit(void)
{
struct mic_driver *mdrv = g_drv;
struct mic_bootparam __iomem *bootparam = mdrv->dp;
iowrite8(-1, &bootparam->h2c_shutdown_db);
mic_free_card_irq(shutdown_cookie, mdrv);
}
static int __init mic_dp_init(void)
{
@ -359,11 +294,7 @@ int __init mic_driver_init(struct mic_driver *mdrv)
u8 node_id;
g_drv = mdrv;
/*
* Unloading the card module is not supported. The MIC card module
* handles fundamental operations like host/card initiated shutdowns
* and informing the host about card crashes and cannot be unloaded.
*/
/* Unloading the card module is not supported. */
if (!try_module_get(mdrv->dev->driver->owner)) {
rc = -ENODEV;
goto done;
@ -374,12 +305,9 @@ int __init mic_driver_init(struct mic_driver *mdrv)
rc = mic_init_irq();
if (rc)
goto dp_uninit;
rc = mic_shutdown_init();
if (rc)
goto irq_uninit;
if (!mic_request_dma_chans(mdrv)) {
rc = -ENODEV;
goto shutdown_uninit;
goto irq_uninit;
}
rc = mic_devices_init(mdrv);
if (rc)
@ -390,21 +318,18 @@ int __init mic_driver_init(struct mic_driver *mdrv)
NULL, &scif_hw_ops,
0, node_id, &mdrv->mdev.mmio, NULL,
NULL, mdrv->dp, mdrv->dma_ch,
mdrv->num_dma_ch);
mdrv->num_dma_ch, true);
if (IS_ERR(mdrv->scdev)) {
rc = PTR_ERR(mdrv->scdev);
goto device_uninit;
}
mic_create_card_debug_dir(mdrv);
atomic_notifier_chain_register(&panic_notifier_list, &mic_panic);
done:
return rc;
device_uninit:
mic_devices_uninit(mdrv);
dma_free:
mic_free_dma_chans(mdrv);
shutdown_uninit:
mic_shutdown_uninit();
irq_uninit:
mic_uninit_irq();
dp_uninit:
@ -425,13 +350,6 @@ void mic_driver_uninit(struct mic_driver *mdrv)
scif_unregister_device(mdrv->scdev);
mic_devices_uninit(mdrv);
mic_free_dma_chans(mdrv);
/*
* Inform the host about the shutdown status i.e. poweroff/restart etc.
* The module cannot be unloaded so the only code path to call
* mic_devices_uninit(..) is the shutdown callback.
*/
mic_notify_host(system_state);
mic_shutdown_uninit();
mic_uninit_irq();
mic_dp_uninit();
module_put(mdrv->dev->driver->owner);

2
drivers/misc/mic/card/mic_x100.c
View File

@ -261,7 +261,7 @@ static int __init mic_probe(struct platform_device *pdev)
mic_hw_intr_init(mdrv);
platform_set_drvdata(pdev, mdrv);
mdrv->dma_mbdev = mbus_register_device(mdrv->dev, MBUS_DEV_DMA_MIC,
NULL, &mbus_hw_ops,
NULL, &mbus_hw_ops, 0,
mdrv->mdev.mmio.va);
if (IS_ERR(mdrv->dma_mbdev)) {
rc = PTR_ERR(mdrv->dma_mbdev);

13
drivers/misc/mic/common/mic_dev.h
View File

@ -21,6 +21,19 @@
#ifndef __MIC_DEV_H__
#define __MIC_DEV_H__
/* The maximum number of MIC devices supported in a single host system. */
#define MIC_MAX_NUM_DEVS 128
/**
* enum mic_hw_family - The hardware family to which a device belongs.
*/
enum mic_hw_family {
MIC_FAMILY_X100 = 0,
MIC_FAMILY_X200,
MIC_FAMILY_UNKNOWN,
MIC_FAMILY_LAST
};
/**
* struct mic_mw - MIC memory window
*

3
include/linux/mic_bus.h
View File

@ -91,7 +91,8 @@ struct mbus_hw_ops {
struct mbus_device *
mbus_register_device(struct device *pdev, int id, struct dma_map_ops *dma_ops,
struct mbus_hw_ops *hw_ops, void __iomem *mmio_va);
struct mbus_hw_ops *hw_ops, int index,
void __iomem *mmio_va);
void mbus_unregister_device(struct mbus_device *mbdev);
int mbus_register_driver(struct mbus_driver *drv);