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983 lines
22 KiB
983 lines
22 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
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* Driver for s390 chsc subchannels |
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* |
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* Copyright IBM Corp. 2008, 2011 |
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* |
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* Author(s): Cornelia Huck <[email protected]> |
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* |
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*/ |
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|
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#include <linux/slab.h> |
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#include <linux/compat.h> |
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#include <linux/device.h> |
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#include <linux/module.h> |
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#include <linux/uaccess.h> |
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#include <linux/miscdevice.h> |
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#include <linux/kernel_stat.h> |
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|
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#include <asm/cio.h> |
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#include <asm/chsc.h> |
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#include <asm/isc.h> |
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|
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#include "cio.h" |
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#include "cio_debug.h" |
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#include "css.h" |
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#include "chsc_sch.h" |
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#include "ioasm.h" |
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|
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static debug_info_t *chsc_debug_msg_id; |
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static debug_info_t *chsc_debug_log_id; |
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|
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static struct chsc_request *on_close_request; |
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static struct chsc_async_area *on_close_chsc_area; |
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static DEFINE_MUTEX(on_close_mutex); |
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|
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#define CHSC_MSG(imp, args...) do { \ |
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debug_sprintf_event(chsc_debug_msg_id, imp , ##args); \ |
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} while (0) |
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|
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#define CHSC_LOG(imp, txt) do { \ |
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debug_text_event(chsc_debug_log_id, imp , txt); \ |
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} while (0) |
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|
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static void CHSC_LOG_HEX(int level, void *data, int length) |
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{ |
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debug_event(chsc_debug_log_id, level, data, length); |
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} |
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|
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MODULE_AUTHOR("IBM Corporation"); |
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MODULE_DESCRIPTION("driver for s390 chsc subchannels"); |
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MODULE_LICENSE("GPL"); |
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|
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static void chsc_subchannel_irq(struct subchannel *sch) |
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{ |
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struct chsc_private *private = dev_get_drvdata(&sch->dev); |
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struct chsc_request *request = private->request; |
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struct irb *irb = this_cpu_ptr(&cio_irb); |
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|
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CHSC_LOG(4, "irb"); |
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CHSC_LOG_HEX(4, irb, sizeof(*irb)); |
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inc_irq_stat(IRQIO_CSC); |
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|
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/* Copy irb to provided request and set done. */ |
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if (!request) { |
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CHSC_MSG(0, "Interrupt on sch 0.%x.%04x with no request\n", |
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sch->schid.ssid, sch->schid.sch_no); |
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return; |
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} |
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private->request = NULL; |
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memcpy(&request->irb, irb, sizeof(*irb)); |
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cio_update_schib(sch); |
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complete(&request->completion); |
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put_device(&sch->dev); |
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} |
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|
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static int chsc_subchannel_probe(struct subchannel *sch) |
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{ |
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struct chsc_private *private; |
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int ret; |
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|
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CHSC_MSG(6, "Detected chsc subchannel 0.%x.%04x\n", |
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sch->schid.ssid, sch->schid.sch_no); |
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sch->isc = CHSC_SCH_ISC; |
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private = kzalloc(sizeof(*private), GFP_KERNEL); |
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if (!private) |
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return -ENOMEM; |
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dev_set_drvdata(&sch->dev, private); |
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ret = cio_enable_subchannel(sch, (u32)(unsigned long)sch); |
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if (ret) { |
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CHSC_MSG(0, "Failed to enable 0.%x.%04x: %d\n", |
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sch->schid.ssid, sch->schid.sch_no, ret); |
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dev_set_drvdata(&sch->dev, NULL); |
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kfree(private); |
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} else { |
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if (dev_get_uevent_suppress(&sch->dev)) { |
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dev_set_uevent_suppress(&sch->dev, 0); |
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kobject_uevent(&sch->dev.kobj, KOBJ_ADD); |
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} |
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} |
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return ret; |
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} |
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|
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static int chsc_subchannel_remove(struct subchannel *sch) |
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{ |
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struct chsc_private *private; |
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|
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cio_disable_subchannel(sch); |
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private = dev_get_drvdata(&sch->dev); |
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dev_set_drvdata(&sch->dev, NULL); |
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if (private->request) { |
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complete(&private->request->completion); |
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put_device(&sch->dev); |
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} |
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kfree(private); |
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return 0; |
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} |
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|
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static void chsc_subchannel_shutdown(struct subchannel *sch) |
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{ |
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cio_disable_subchannel(sch); |
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} |
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|
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static struct css_device_id chsc_subchannel_ids[] = { |
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{ .match_flags = 0x1, .type =SUBCHANNEL_TYPE_CHSC, }, |
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{ /* end of list */ }, |
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}; |
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MODULE_DEVICE_TABLE(css, chsc_subchannel_ids); |
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|
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static struct css_driver chsc_subchannel_driver = { |
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.drv = { |
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.owner = THIS_MODULE, |
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.name = "chsc_subchannel", |
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}, |
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.subchannel_type = chsc_subchannel_ids, |
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.irq = chsc_subchannel_irq, |
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.probe = chsc_subchannel_probe, |
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.remove = chsc_subchannel_remove, |
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.shutdown = chsc_subchannel_shutdown, |
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}; |
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|
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static int __init chsc_init_dbfs(void) |
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{ |
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chsc_debug_msg_id = debug_register("chsc_msg", 8, 1, 4 * sizeof(long)); |
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if (!chsc_debug_msg_id) |
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goto out; |
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debug_register_view(chsc_debug_msg_id, &debug_sprintf_view); |
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debug_set_level(chsc_debug_msg_id, 2); |
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chsc_debug_log_id = debug_register("chsc_log", 16, 1, 16); |
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if (!chsc_debug_log_id) |
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goto out; |
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debug_register_view(chsc_debug_log_id, &debug_hex_ascii_view); |
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debug_set_level(chsc_debug_log_id, 2); |
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return 0; |
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out: |
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debug_unregister(chsc_debug_msg_id); |
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return -ENOMEM; |
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} |
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|
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static void chsc_remove_dbfs(void) |
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{ |
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debug_unregister(chsc_debug_log_id); |
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debug_unregister(chsc_debug_msg_id); |
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} |
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|
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static int __init chsc_init_sch_driver(void) |
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{ |
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return css_driver_register(&chsc_subchannel_driver); |
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} |
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|
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static void chsc_cleanup_sch_driver(void) |
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{ |
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css_driver_unregister(&chsc_subchannel_driver); |
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} |
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|
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static DEFINE_SPINLOCK(chsc_lock); |
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|
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static int chsc_subchannel_match_next_free(struct device *dev, const void *data) |
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{ |
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struct subchannel *sch = to_subchannel(dev); |
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|
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return sch->schib.pmcw.ena && !scsw_fctl(&sch->schib.scsw); |
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} |
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static struct subchannel *chsc_get_next_subchannel(struct subchannel *sch) |
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{ |
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struct device *dev; |
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|
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dev = driver_find_device(&chsc_subchannel_driver.drv, |
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sch ? &sch->dev : NULL, NULL, |
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chsc_subchannel_match_next_free); |
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return dev ? to_subchannel(dev) : NULL; |
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} |
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|
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/** |
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* chsc_async() - try to start a chsc request asynchronously |
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* @chsc_area: request to be started |
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* @request: request structure to associate |
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* |
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* Tries to start a chsc request on one of the existing chsc subchannels. |
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* Returns: |
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* %0 if the request was performed synchronously |
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* %-EINPROGRESS if the request was successfully started |
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* %-EBUSY if all chsc subchannels are busy |
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* %-ENODEV if no chsc subchannels are available |
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* Context: |
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* interrupts disabled, chsc_lock held |
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*/ |
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static int chsc_async(struct chsc_async_area *chsc_area, |
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struct chsc_request *request) |
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{ |
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int cc; |
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struct chsc_private *private; |
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struct subchannel *sch = NULL; |
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int ret = -ENODEV; |
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char dbf[10]; |
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|
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chsc_area->header.key = PAGE_DEFAULT_KEY >> 4; |
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while ((sch = chsc_get_next_subchannel(sch))) { |
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spin_lock(sch->lock); |
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private = dev_get_drvdata(&sch->dev); |
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if (private->request) { |
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spin_unlock(sch->lock); |
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ret = -EBUSY; |
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continue; |
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} |
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chsc_area->header.sid = sch->schid; |
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CHSC_LOG(2, "schid"); |
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CHSC_LOG_HEX(2, &sch->schid, sizeof(sch->schid)); |
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cc = chsc(chsc_area); |
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snprintf(dbf, sizeof(dbf), "cc:%d", cc); |
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CHSC_LOG(2, dbf); |
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switch (cc) { |
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case 0: |
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ret = 0; |
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break; |
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case 1: |
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sch->schib.scsw.cmd.fctl |= SCSW_FCTL_START_FUNC; |
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ret = -EINPROGRESS; |
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private->request = request; |
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break; |
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case 2: |
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ret = -EBUSY; |
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break; |
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default: |
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ret = -ENODEV; |
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} |
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spin_unlock(sch->lock); |
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CHSC_MSG(2, "chsc on 0.%x.%04x returned cc=%d\n", |
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sch->schid.ssid, sch->schid.sch_no, cc); |
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if (ret == -EINPROGRESS) |
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return -EINPROGRESS; |
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put_device(&sch->dev); |
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if (ret == 0) |
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return 0; |
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} |
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return ret; |
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} |
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|
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static void chsc_log_command(void *chsc_area) |
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{ |
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char dbf[10]; |
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|
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snprintf(dbf, sizeof(dbf), "CHSC:%x", ((uint16_t *)chsc_area)[1]); |
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CHSC_LOG(0, dbf); |
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CHSC_LOG_HEX(0, chsc_area, 32); |
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} |
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|
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static int chsc_examine_irb(struct chsc_request *request) |
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{ |
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int backed_up; |
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|
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if (!(scsw_stctl(&request->irb.scsw) & SCSW_STCTL_STATUS_PEND)) |
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return -EIO; |
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backed_up = scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHAIN_CHECK; |
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request->irb.scsw.cmd.cstat &= ~SCHN_STAT_CHAIN_CHECK; |
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if (scsw_cstat(&request->irb.scsw) == 0) |
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return 0; |
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if (!backed_up) |
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return 0; |
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if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_PROG_CHECK) |
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return -EIO; |
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if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_PROT_CHECK) |
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return -EPERM; |
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if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHN_DATA_CHK) |
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return -EAGAIN; |
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if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHN_CTRL_CHK) |
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return -EAGAIN; |
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return -EIO; |
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} |
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|
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static int chsc_ioctl_start(void __user *user_area) |
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{ |
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struct chsc_request *request; |
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struct chsc_async_area *chsc_area; |
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int ret; |
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char dbf[10]; |
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|
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if (!css_general_characteristics.dynio) |
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/* It makes no sense to try. */ |
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return -EOPNOTSUPP; |
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chsc_area = (void *)get_zeroed_page(GFP_DMA | GFP_KERNEL); |
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if (!chsc_area) |
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return -ENOMEM; |
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request = kzalloc(sizeof(*request), GFP_KERNEL); |
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if (!request) { |
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ret = -ENOMEM; |
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goto out_free; |
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} |
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init_completion(&request->completion); |
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if (copy_from_user(chsc_area, user_area, PAGE_SIZE)) { |
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ret = -EFAULT; |
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goto out_free; |
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} |
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chsc_log_command(chsc_area); |
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spin_lock_irq(&chsc_lock); |
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ret = chsc_async(chsc_area, request); |
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spin_unlock_irq(&chsc_lock); |
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if (ret == -EINPROGRESS) { |
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wait_for_completion(&request->completion); |
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ret = chsc_examine_irb(request); |
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} |
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/* copy area back to user */ |
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if (!ret) |
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if (copy_to_user(user_area, chsc_area, PAGE_SIZE)) |
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ret = -EFAULT; |
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out_free: |
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snprintf(dbf, sizeof(dbf), "ret:%d", ret); |
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CHSC_LOG(0, dbf); |
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kfree(request); |
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free_page((unsigned long)chsc_area); |
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return ret; |
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} |
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|
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static int chsc_ioctl_on_close_set(void __user *user_area) |
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{ |
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char dbf[13]; |
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int ret; |
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|
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mutex_lock(&on_close_mutex); |
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if (on_close_chsc_area) { |
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ret = -EBUSY; |
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goto out_unlock; |
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} |
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on_close_request = kzalloc(sizeof(*on_close_request), GFP_KERNEL); |
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if (!on_close_request) { |
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ret = -ENOMEM; |
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goto out_unlock; |
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} |
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on_close_chsc_area = (void *)get_zeroed_page(GFP_DMA | GFP_KERNEL); |
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if (!on_close_chsc_area) { |
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ret = -ENOMEM; |
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goto out_free_request; |
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} |
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if (copy_from_user(on_close_chsc_area, user_area, PAGE_SIZE)) { |
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ret = -EFAULT; |
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goto out_free_chsc; |
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} |
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ret = 0; |
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goto out_unlock; |
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|
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out_free_chsc: |
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free_page((unsigned long)on_close_chsc_area); |
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on_close_chsc_area = NULL; |
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out_free_request: |
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kfree(on_close_request); |
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on_close_request = NULL; |
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out_unlock: |
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mutex_unlock(&on_close_mutex); |
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snprintf(dbf, sizeof(dbf), "ocsret:%d", ret); |
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CHSC_LOG(0, dbf); |
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return ret; |
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} |
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|
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static int chsc_ioctl_on_close_remove(void) |
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{ |
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char dbf[13]; |
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int ret; |
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|
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mutex_lock(&on_close_mutex); |
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if (!on_close_chsc_area) { |
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ret = -ENOENT; |
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goto out_unlock; |
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} |
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free_page((unsigned long)on_close_chsc_area); |
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on_close_chsc_area = NULL; |
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kfree(on_close_request); |
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on_close_request = NULL; |
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ret = 0; |
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out_unlock: |
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mutex_unlock(&on_close_mutex); |
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snprintf(dbf, sizeof(dbf), "ocrret:%d", ret); |
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CHSC_LOG(0, dbf); |
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return ret; |
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} |
|
|
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static int chsc_ioctl_start_sync(void __user *user_area) |
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{ |
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struct chsc_sync_area *chsc_area; |
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int ret, ccode; |
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|
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chsc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
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if (!chsc_area) |
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return -ENOMEM; |
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if (copy_from_user(chsc_area, user_area, PAGE_SIZE)) { |
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ret = -EFAULT; |
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goto out_free; |
|
} |
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if (chsc_area->header.code & 0x4000) { |
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ret = -EINVAL; |
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goto out_free; |
|
} |
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chsc_log_command(chsc_area); |
|
ccode = chsc(chsc_area); |
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if (ccode != 0) { |
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ret = -EIO; |
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goto out_free; |
|
} |
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if (copy_to_user(user_area, chsc_area, PAGE_SIZE)) |
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ret = -EFAULT; |
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else |
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ret = 0; |
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out_free: |
|
free_page((unsigned long)chsc_area); |
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return ret; |
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} |
|
|
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static int chsc_ioctl_info_channel_path(void __user *user_cd) |
|
{ |
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struct chsc_chp_cd *cd; |
|
int ret, ccode; |
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struct { |
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struct chsc_header request; |
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u32 : 2; |
|
u32 m : 1; |
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u32 : 1; |
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u32 fmt1 : 4; |
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u32 cssid : 8; |
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u32 : 8; |
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u32 first_chpid : 8; |
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u32 : 24; |
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u32 last_chpid : 8; |
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u32 : 32; |
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struct chsc_header response; |
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u8 data[PAGE_SIZE - 20]; |
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} __attribute__ ((packed)) *scpcd_area; |
|
|
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scpcd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
|
if (!scpcd_area) |
|
return -ENOMEM; |
|
cd = kzalloc(sizeof(*cd), GFP_KERNEL); |
|
if (!cd) { |
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ret = -ENOMEM; |
|
goto out_free; |
|
} |
|
if (copy_from_user(cd, user_cd, sizeof(*cd))) { |
|
ret = -EFAULT; |
|
goto out_free; |
|
} |
|
scpcd_area->request.length = 0x0010; |
|
scpcd_area->request.code = 0x0028; |
|
scpcd_area->m = cd->m; |
|
scpcd_area->fmt1 = cd->fmt; |
|
scpcd_area->cssid = cd->chpid.cssid; |
|
scpcd_area->first_chpid = cd->chpid.id; |
|
scpcd_area->last_chpid = cd->chpid.id; |
|
|
|
ccode = chsc(scpcd_area); |
|
if (ccode != 0) { |
|
ret = -EIO; |
|
goto out_free; |
|
} |
|
if (scpcd_area->response.code != 0x0001) { |
|
ret = -EIO; |
|
CHSC_MSG(0, "scpcd: response code=%x\n", |
|
scpcd_area->response.code); |
|
goto out_free; |
|
} |
|
memcpy(&cd->cpcb, &scpcd_area->response, scpcd_area->response.length); |
|
if (copy_to_user(user_cd, cd, sizeof(*cd))) |
|
ret = -EFAULT; |
|
else |
|
ret = 0; |
|
out_free: |
|
kfree(cd); |
|
free_page((unsigned long)scpcd_area); |
|
return ret; |
|
} |
|
|
|
static int chsc_ioctl_info_cu(void __user *user_cd) |
|
{ |
|
struct chsc_cu_cd *cd; |
|
int ret, ccode; |
|
struct { |
|
struct chsc_header request; |
|
u32 : 2; |
|
u32 m : 1; |
|
u32 : 1; |
|
u32 fmt1 : 4; |
|
u32 cssid : 8; |
|
u32 : 8; |
|
u32 first_cun : 8; |
|
u32 : 24; |
|
u32 last_cun : 8; |
|
u32 : 32; |
|
struct chsc_header response; |
|
u8 data[PAGE_SIZE - 20]; |
|
} __attribute__ ((packed)) *scucd_area; |
|
|
|
scucd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
|
if (!scucd_area) |
|
return -ENOMEM; |
|
cd = kzalloc(sizeof(*cd), GFP_KERNEL); |
|
if (!cd) { |
|
ret = -ENOMEM; |
|
goto out_free; |
|
} |
|
if (copy_from_user(cd, user_cd, sizeof(*cd))) { |
|
ret = -EFAULT; |
|
goto out_free; |
|
} |
|
scucd_area->request.length = 0x0010; |
|
scucd_area->request.code = 0x0026; |
|
scucd_area->m = cd->m; |
|
scucd_area->fmt1 = cd->fmt; |
|
scucd_area->cssid = cd->cssid; |
|
scucd_area->first_cun = cd->cun; |
|
scucd_area->last_cun = cd->cun; |
|
|
|
ccode = chsc(scucd_area); |
|
if (ccode != 0) { |
|
ret = -EIO; |
|
goto out_free; |
|
} |
|
if (scucd_area->response.code != 0x0001) { |
|
ret = -EIO; |
|
CHSC_MSG(0, "scucd: response code=%x\n", |
|
scucd_area->response.code); |
|
goto out_free; |
|
} |
|
memcpy(&cd->cucb, &scucd_area->response, scucd_area->response.length); |
|
if (copy_to_user(user_cd, cd, sizeof(*cd))) |
|
ret = -EFAULT; |
|
else |
|
ret = 0; |
|
out_free: |
|
kfree(cd); |
|
free_page((unsigned long)scucd_area); |
|
return ret; |
|
} |
|
|
|
static int chsc_ioctl_info_sch_cu(void __user *user_cud) |
|
{ |
|
struct chsc_sch_cud *cud; |
|
int ret, ccode; |
|
struct { |
|
struct chsc_header request; |
|
u32 : 2; |
|
u32 m : 1; |
|
u32 : 5; |
|
u32 fmt1 : 4; |
|
u32 : 2; |
|
u32 ssid : 2; |
|
u32 first_sch : 16; |
|
u32 : 8; |
|
u32 cssid : 8; |
|
u32 last_sch : 16; |
|
u32 : 32; |
|
struct chsc_header response; |
|
u8 data[PAGE_SIZE - 20]; |
|
} __attribute__ ((packed)) *sscud_area; |
|
|
|
sscud_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
|
if (!sscud_area) |
|
return -ENOMEM; |
|
cud = kzalloc(sizeof(*cud), GFP_KERNEL); |
|
if (!cud) { |
|
ret = -ENOMEM; |
|
goto out_free; |
|
} |
|
if (copy_from_user(cud, user_cud, sizeof(*cud))) { |
|
ret = -EFAULT; |
|
goto out_free; |
|
} |
|
sscud_area->request.length = 0x0010; |
|
sscud_area->request.code = 0x0006; |
|
sscud_area->m = cud->schid.m; |
|
sscud_area->fmt1 = cud->fmt; |
|
sscud_area->ssid = cud->schid.ssid; |
|
sscud_area->first_sch = cud->schid.sch_no; |
|
sscud_area->cssid = cud->schid.cssid; |
|
sscud_area->last_sch = cud->schid.sch_no; |
|
|
|
ccode = chsc(sscud_area); |
|
if (ccode != 0) { |
|
ret = -EIO; |
|
goto out_free; |
|
} |
|
if (sscud_area->response.code != 0x0001) { |
|
ret = -EIO; |
|
CHSC_MSG(0, "sscud: response code=%x\n", |
|
sscud_area->response.code); |
|
goto out_free; |
|
} |
|
memcpy(&cud->scub, &sscud_area->response, sscud_area->response.length); |
|
if (copy_to_user(user_cud, cud, sizeof(*cud))) |
|
ret = -EFAULT; |
|
else |
|
ret = 0; |
|
out_free: |
|
kfree(cud); |
|
free_page((unsigned long)sscud_area); |
|
return ret; |
|
} |
|
|
|
static int chsc_ioctl_conf_info(void __user *user_ci) |
|
{ |
|
struct chsc_conf_info *ci; |
|
int ret, ccode; |
|
struct { |
|
struct chsc_header request; |
|
u32 : 2; |
|
u32 m : 1; |
|
u32 : 1; |
|
u32 fmt1 : 4; |
|
u32 cssid : 8; |
|
u32 : 6; |
|
u32 ssid : 2; |
|
u32 : 8; |
|
u64 : 64; |
|
struct chsc_header response; |
|
u8 data[PAGE_SIZE - 20]; |
|
} __attribute__ ((packed)) *sci_area; |
|
|
|
sci_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
|
if (!sci_area) |
|
return -ENOMEM; |
|
ci = kzalloc(sizeof(*ci), GFP_KERNEL); |
|
if (!ci) { |
|
ret = -ENOMEM; |
|
goto out_free; |
|
} |
|
if (copy_from_user(ci, user_ci, sizeof(*ci))) { |
|
ret = -EFAULT; |
|
goto out_free; |
|
} |
|
sci_area->request.length = 0x0010; |
|
sci_area->request.code = 0x0012; |
|
sci_area->m = ci->id.m; |
|
sci_area->fmt1 = ci->fmt; |
|
sci_area->cssid = ci->id.cssid; |
|
sci_area->ssid = ci->id.ssid; |
|
|
|
ccode = chsc(sci_area); |
|
if (ccode != 0) { |
|
ret = -EIO; |
|
goto out_free; |
|
} |
|
if (sci_area->response.code != 0x0001) { |
|
ret = -EIO; |
|
CHSC_MSG(0, "sci: response code=%x\n", |
|
sci_area->response.code); |
|
goto out_free; |
|
} |
|
memcpy(&ci->scid, &sci_area->response, sci_area->response.length); |
|
if (copy_to_user(user_ci, ci, sizeof(*ci))) |
|
ret = -EFAULT; |
|
else |
|
ret = 0; |
|
out_free: |
|
kfree(ci); |
|
free_page((unsigned long)sci_area); |
|
return ret; |
|
} |
|
|
|
static int chsc_ioctl_conf_comp_list(void __user *user_ccl) |
|
{ |
|
struct chsc_comp_list *ccl; |
|
int ret, ccode; |
|
struct { |
|
struct chsc_header request; |
|
u32 ctype : 8; |
|
u32 : 4; |
|
u32 fmt : 4; |
|
u32 : 16; |
|
u64 : 64; |
|
u32 list_parm[2]; |
|
u64 : 64; |
|
struct chsc_header response; |
|
u8 data[PAGE_SIZE - 36]; |
|
} __attribute__ ((packed)) *sccl_area; |
|
struct { |
|
u32 m : 1; |
|
u32 : 31; |
|
u32 cssid : 8; |
|
u32 : 16; |
|
u32 chpid : 8; |
|
} __attribute__ ((packed)) *chpid_parm; |
|
struct { |
|
u32 f_cssid : 8; |
|
u32 l_cssid : 8; |
|
u32 : 16; |
|
u32 res; |
|
} __attribute__ ((packed)) *cssids_parm; |
|
|
|
sccl_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
|
if (!sccl_area) |
|
return -ENOMEM; |
|
ccl = kzalloc(sizeof(*ccl), GFP_KERNEL); |
|
if (!ccl) { |
|
ret = -ENOMEM; |
|
goto out_free; |
|
} |
|
if (copy_from_user(ccl, user_ccl, sizeof(*ccl))) { |
|
ret = -EFAULT; |
|
goto out_free; |
|
} |
|
sccl_area->request.length = 0x0020; |
|
sccl_area->request.code = 0x0030; |
|
sccl_area->fmt = ccl->req.fmt; |
|
sccl_area->ctype = ccl->req.ctype; |
|
switch (sccl_area->ctype) { |
|
case CCL_CU_ON_CHP: |
|
case CCL_IOP_CHP: |
|
chpid_parm = (void *)&sccl_area->list_parm; |
|
chpid_parm->m = ccl->req.chpid.m; |
|
chpid_parm->cssid = ccl->req.chpid.chp.cssid; |
|
chpid_parm->chpid = ccl->req.chpid.chp.id; |
|
break; |
|
case CCL_CSS_IMG: |
|
case CCL_CSS_IMG_CONF_CHAR: |
|
cssids_parm = (void *)&sccl_area->list_parm; |
|
cssids_parm->f_cssid = ccl->req.cssids.f_cssid; |
|
cssids_parm->l_cssid = ccl->req.cssids.l_cssid; |
|
break; |
|
} |
|
ccode = chsc(sccl_area); |
|
if (ccode != 0) { |
|
ret = -EIO; |
|
goto out_free; |
|
} |
|
if (sccl_area->response.code != 0x0001) { |
|
ret = -EIO; |
|
CHSC_MSG(0, "sccl: response code=%x\n", |
|
sccl_area->response.code); |
|
goto out_free; |
|
} |
|
memcpy(&ccl->sccl, &sccl_area->response, sccl_area->response.length); |
|
if (copy_to_user(user_ccl, ccl, sizeof(*ccl))) |
|
ret = -EFAULT; |
|
else |
|
ret = 0; |
|
out_free: |
|
kfree(ccl); |
|
free_page((unsigned long)sccl_area); |
|
return ret; |
|
} |
|
|
|
static int chsc_ioctl_chpd(void __user *user_chpd) |
|
{ |
|
struct chsc_scpd *scpd_area; |
|
struct chsc_cpd_info *chpd; |
|
int ret; |
|
|
|
chpd = kzalloc(sizeof(*chpd), GFP_KERNEL); |
|
scpd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
|
if (!scpd_area || !chpd) { |
|
ret = -ENOMEM; |
|
goto out_free; |
|
} |
|
if (copy_from_user(chpd, user_chpd, sizeof(*chpd))) { |
|
ret = -EFAULT; |
|
goto out_free; |
|
} |
|
ret = chsc_determine_channel_path_desc(chpd->chpid, chpd->fmt, |
|
chpd->rfmt, chpd->c, chpd->m, |
|
scpd_area); |
|
if (ret) |
|
goto out_free; |
|
memcpy(&chpd->chpdb, &scpd_area->response, scpd_area->response.length); |
|
if (copy_to_user(user_chpd, chpd, sizeof(*chpd))) |
|
ret = -EFAULT; |
|
out_free: |
|
kfree(chpd); |
|
free_page((unsigned long)scpd_area); |
|
return ret; |
|
} |
|
|
|
static int chsc_ioctl_dcal(void __user *user_dcal) |
|
{ |
|
struct chsc_dcal *dcal; |
|
int ret, ccode; |
|
struct { |
|
struct chsc_header request; |
|
u32 atype : 8; |
|
u32 : 4; |
|
u32 fmt : 4; |
|
u32 : 16; |
|
u32 res0[2]; |
|
u32 list_parm[2]; |
|
u32 res1[2]; |
|
struct chsc_header response; |
|
u8 data[PAGE_SIZE - 36]; |
|
} __attribute__ ((packed)) *sdcal_area; |
|
|
|
sdcal_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
|
if (!sdcal_area) |
|
return -ENOMEM; |
|
dcal = kzalloc(sizeof(*dcal), GFP_KERNEL); |
|
if (!dcal) { |
|
ret = -ENOMEM; |
|
goto out_free; |
|
} |
|
if (copy_from_user(dcal, user_dcal, sizeof(*dcal))) { |
|
ret = -EFAULT; |
|
goto out_free; |
|
} |
|
sdcal_area->request.length = 0x0020; |
|
sdcal_area->request.code = 0x0034; |
|
sdcal_area->atype = dcal->req.atype; |
|
sdcal_area->fmt = dcal->req.fmt; |
|
memcpy(&sdcal_area->list_parm, &dcal->req.list_parm, |
|
sizeof(sdcal_area->list_parm)); |
|
|
|
ccode = chsc(sdcal_area); |
|
if (ccode != 0) { |
|
ret = -EIO; |
|
goto out_free; |
|
} |
|
if (sdcal_area->response.code != 0x0001) { |
|
ret = -EIO; |
|
CHSC_MSG(0, "sdcal: response code=%x\n", |
|
sdcal_area->response.code); |
|
goto out_free; |
|
} |
|
memcpy(&dcal->sdcal, &sdcal_area->response, |
|
sdcal_area->response.length); |
|
if (copy_to_user(user_dcal, dcal, sizeof(*dcal))) |
|
ret = -EFAULT; |
|
else |
|
ret = 0; |
|
out_free: |
|
kfree(dcal); |
|
free_page((unsigned long)sdcal_area); |
|
return ret; |
|
} |
|
|
|
static long chsc_ioctl(struct file *filp, unsigned int cmd, |
|
unsigned long arg) |
|
{ |
|
void __user *argp; |
|
|
|
CHSC_MSG(2, "chsc_ioctl called, cmd=%x\n", cmd); |
|
if (is_compat_task()) |
|
argp = compat_ptr(arg); |
|
else |
|
argp = (void __user *)arg; |
|
switch (cmd) { |
|
case CHSC_START: |
|
return chsc_ioctl_start(argp); |
|
case CHSC_START_SYNC: |
|
return chsc_ioctl_start_sync(argp); |
|
case CHSC_INFO_CHANNEL_PATH: |
|
return chsc_ioctl_info_channel_path(argp); |
|
case CHSC_INFO_CU: |
|
return chsc_ioctl_info_cu(argp); |
|
case CHSC_INFO_SCH_CU: |
|
return chsc_ioctl_info_sch_cu(argp); |
|
case CHSC_INFO_CI: |
|
return chsc_ioctl_conf_info(argp); |
|
case CHSC_INFO_CCL: |
|
return chsc_ioctl_conf_comp_list(argp); |
|
case CHSC_INFO_CPD: |
|
return chsc_ioctl_chpd(argp); |
|
case CHSC_INFO_DCAL: |
|
return chsc_ioctl_dcal(argp); |
|
case CHSC_ON_CLOSE_SET: |
|
return chsc_ioctl_on_close_set(argp); |
|
case CHSC_ON_CLOSE_REMOVE: |
|
return chsc_ioctl_on_close_remove(); |
|
default: /* unknown ioctl number */ |
|
return -ENOIOCTLCMD; |
|
} |
|
} |
|
|
|
static atomic_t chsc_ready_for_use = ATOMIC_INIT(1); |
|
|
|
static int chsc_open(struct inode *inode, struct file *file) |
|
{ |
|
if (!atomic_dec_and_test(&chsc_ready_for_use)) { |
|
atomic_inc(&chsc_ready_for_use); |
|
return -EBUSY; |
|
} |
|
return nonseekable_open(inode, file); |
|
} |
|
|
|
static int chsc_release(struct inode *inode, struct file *filp) |
|
{ |
|
char dbf[13]; |
|
int ret; |
|
|
|
mutex_lock(&on_close_mutex); |
|
if (!on_close_chsc_area) |
|
goto out_unlock; |
|
init_completion(&on_close_request->completion); |
|
CHSC_LOG(0, "on_close"); |
|
chsc_log_command(on_close_chsc_area); |
|
spin_lock_irq(&chsc_lock); |
|
ret = chsc_async(on_close_chsc_area, on_close_request); |
|
spin_unlock_irq(&chsc_lock); |
|
if (ret == -EINPROGRESS) { |
|
wait_for_completion(&on_close_request->completion); |
|
ret = chsc_examine_irb(on_close_request); |
|
} |
|
snprintf(dbf, sizeof(dbf), "relret:%d", ret); |
|
CHSC_LOG(0, dbf); |
|
free_page((unsigned long)on_close_chsc_area); |
|
on_close_chsc_area = NULL; |
|
kfree(on_close_request); |
|
on_close_request = NULL; |
|
out_unlock: |
|
mutex_unlock(&on_close_mutex); |
|
atomic_inc(&chsc_ready_for_use); |
|
return 0; |
|
} |
|
|
|
static const struct file_operations chsc_fops = { |
|
.owner = THIS_MODULE, |
|
.open = chsc_open, |
|
.release = chsc_release, |
|
.unlocked_ioctl = chsc_ioctl, |
|
.compat_ioctl = chsc_ioctl, |
|
.llseek = no_llseek, |
|
}; |
|
|
|
static struct miscdevice chsc_misc_device = { |
|
.minor = MISC_DYNAMIC_MINOR, |
|
.name = "chsc", |
|
.fops = &chsc_fops, |
|
}; |
|
|
|
static int __init chsc_misc_init(void) |
|
{ |
|
return misc_register(&chsc_misc_device); |
|
} |
|
|
|
static void chsc_misc_cleanup(void) |
|
{ |
|
misc_deregister(&chsc_misc_device); |
|
} |
|
|
|
static int __init chsc_sch_init(void) |
|
{ |
|
int ret; |
|
|
|
ret = chsc_init_dbfs(); |
|
if (ret) |
|
return ret; |
|
isc_register(CHSC_SCH_ISC); |
|
ret = chsc_init_sch_driver(); |
|
if (ret) |
|
goto out_dbf; |
|
ret = chsc_misc_init(); |
|
if (ret) |
|
goto out_driver; |
|
return ret; |
|
out_driver: |
|
chsc_cleanup_sch_driver(); |
|
out_dbf: |
|
isc_unregister(CHSC_SCH_ISC); |
|
chsc_remove_dbfs(); |
|
return ret; |
|
} |
|
|
|
static void __exit chsc_sch_exit(void) |
|
{ |
|
chsc_misc_cleanup(); |
|
chsc_cleanup_sch_driver(); |
|
isc_unregister(CHSC_SCH_ISC); |
|
chsc_remove_dbfs(); |
|
} |
|
|
|
module_init(chsc_sch_init); |
|
module_exit(chsc_sch_exit);
|
|
|