diff options
Diffstat (limited to 'drivers/message/i2o/exec-osm.c')
| -rw-r--r-- | drivers/message/i2o/exec-osm.c | 612 |
1 files changed, 0 insertions, 612 deletions
diff --git a/drivers/message/i2o/exec-osm.c b/drivers/message/i2o/exec-osm.c deleted file mode 100644 index a3970e56ae53..000000000000 --- a/drivers/message/i2o/exec-osm.c +++ /dev/null @@ -1,612 +0,0 @@ -/* - * Executive OSM - * - * Copyright (C) 1999-2002 Red Hat Software - * - * Written by Alan Cox, Building Number Three Ltd - * - * 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. - * - * A lot of the I2O message side code from this is taken from the Red - * Creek RCPCI45 adapter driver by Red Creek Communications - * - * Fixes/additions: - * Philipp Rumpf - * Juha Sievänen <Juha.Sievanen@cs.Helsinki.FI> - * Auvo Häkkinen <Auvo.Hakkinen@cs.Helsinki.FI> - * Deepak Saxena <deepak@plexity.net> - * Boji T Kannanthanam <boji.t.kannanthanam@intel.com> - * Alan Cox <alan@lxorguk.ukuu.org.uk>: - * Ported to Linux 2.5. - * Markus Lidel <Markus.Lidel@shadowconnect.com>: - * Minor fixes for 2.6. - * Markus Lidel <Markus.Lidel@shadowconnect.com>: - * Support for sysfs included. - */ - -#include <linux/module.h> -#include <linux/i2o.h> -#include <linux/delay.h> -#include <linux/workqueue.h> -#include <linux/string.h> -#include <linux/slab.h> -#include <linux/sched.h> /* wait_event_interruptible_timeout() needs this */ -#include <asm/param.h> /* HZ */ -#include "core.h" - -#define OSM_NAME "exec-osm" - -struct i2o_driver i2o_exec_driver; - -/* global wait list for POST WAIT */ -static LIST_HEAD(i2o_exec_wait_list); - -/* Wait struct needed for POST WAIT */ -struct i2o_exec_wait { - wait_queue_head_t *wq; /* Pointer to Wait queue */ - struct i2o_dma dma; /* DMA buffers to free on failure */ - u32 tcntxt; /* transaction context from reply */ - int complete; /* 1 if reply received otherwise 0 */ - u32 m; /* message id */ - struct i2o_message *msg; /* pointer to the reply message */ - struct list_head list; /* node in global wait list */ - spinlock_t lock; /* lock before modifying */ -}; - -/* Work struct needed to handle LCT NOTIFY replies */ -struct i2o_exec_lct_notify_work { - struct work_struct work; /* work struct */ - struct i2o_controller *c; /* controller on which the LCT NOTIFY - was received */ -}; - -/* Exec OSM class handling definition */ -static struct i2o_class_id i2o_exec_class_id[] = { - {I2O_CLASS_EXECUTIVE}, - {I2O_CLASS_END} -}; - -/** - * i2o_exec_wait_alloc - Allocate a i2o_exec_wait struct an initialize it - * - * Allocate the i2o_exec_wait struct and initialize the wait. - * - * Returns i2o_exec_wait pointer on success or negative error code on - * failure. - */ -static struct i2o_exec_wait *i2o_exec_wait_alloc(void) -{ - struct i2o_exec_wait *wait; - - wait = kzalloc(sizeof(*wait), GFP_KERNEL); - if (!wait) - return NULL; - - INIT_LIST_HEAD(&wait->list); - spin_lock_init(&wait->lock); - - return wait; -}; - -/** - * i2o_exec_wait_free - Free an i2o_exec_wait struct - * @wait: I2O wait data which should be cleaned up - */ -static void i2o_exec_wait_free(struct i2o_exec_wait *wait) -{ - kfree(wait); -}; - -/** - * i2o_msg_post_wait_mem - Post and wait a message with DMA buffers - * @c: controller - * @msg: message to post - * @timeout: time in seconds to wait - * @dma: i2o_dma struct of the DMA buffer to free on failure - * - * This API allows an OSM to post a message and then be told whether or - * not the system received a successful reply. If the message times out - * then the value '-ETIMEDOUT' is returned. This is a special case. In - * this situation the message may (should) complete at an indefinite time - * in the future. When it completes it will use the memory buffer - * attached to the request. If -ETIMEDOUT is returned then the memory - * buffer must not be freed. Instead the event completion will free them - * for you. In all other cases the buffer are your problem. - * - * Returns 0 on success, negative error code on timeout or positive error - * code from reply. - */ -int i2o_msg_post_wait_mem(struct i2o_controller *c, struct i2o_message *msg, - unsigned long timeout, struct i2o_dma *dma) -{ - DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq); - struct i2o_exec_wait *wait; - static u32 tcntxt = 0x80000000; - unsigned long flags; - int rc = 0; - - wait = i2o_exec_wait_alloc(); - if (!wait) { - i2o_msg_nop(c, msg); - return -ENOMEM; - } - - if (tcntxt == 0xffffffff) - tcntxt = 0x80000000; - - if (dma) - wait->dma = *dma; - - /* - * Fill in the message initiator context and transaction context. - * We will only use transaction contexts >= 0x80000000 for POST WAIT, - * so we could find a POST WAIT reply easier in the reply handler. - */ - msg->u.s.icntxt = cpu_to_le32(i2o_exec_driver.context); - wait->tcntxt = tcntxt++; - msg->u.s.tcntxt = cpu_to_le32(wait->tcntxt); - - wait->wq = &wq; - /* - * we add elements to the head, because if a entry in the list will - * never be removed, we have to iterate over it every time - */ - list_add(&wait->list, &i2o_exec_wait_list); - - /* - * Post the message to the controller. At some point later it will - * return. If we time out before it returns then complete will be zero. - */ - i2o_msg_post(c, msg); - - wait_event_interruptible_timeout(wq, wait->complete, timeout * HZ); - - spin_lock_irqsave(&wait->lock, flags); - - wait->wq = NULL; - - if (wait->complete) - rc = le32_to_cpu(wait->msg->body[0]) >> 24; - else { - /* - * We cannot remove it now. This is important. When it does - * terminate (which it must do if the controller has not - * died...) then it will otherwise scribble on stuff. - * - * FIXME: try abort message - */ - if (dma) - dma->virt = NULL; - - rc = -ETIMEDOUT; - } - - spin_unlock_irqrestore(&wait->lock, flags); - - if (rc != -ETIMEDOUT) { - i2o_flush_reply(c, wait->m); - i2o_exec_wait_free(wait); - } - - return rc; -}; - -/** - * i2o_msg_post_wait_complete - Reply to a i2o_msg_post request from IOP - * @c: I2O controller which answers - * @m: message id - * @msg: pointer to the I2O reply message - * @context: transaction context of request - * - * This function is called in interrupt context only. If the reply reached - * before the timeout, the i2o_exec_wait struct is filled with the message - * and the task will be waked up. The task is now responsible for returning - * the message m back to the controller! If the message reaches us after - * the timeout clean up the i2o_exec_wait struct (including allocated - * DMA buffer). - * - * Return 0 on success and if the message m should not be given back to the - * I2O controller, or >0 on success and if the message should be given back - * afterwords. Returns negative error code on failure. In this case the - * message must also be given back to the controller. - */ -static int i2o_msg_post_wait_complete(struct i2o_controller *c, u32 m, - struct i2o_message *msg, u32 context) -{ - struct i2o_exec_wait *wait, *tmp; - unsigned long flags; - int rc = 1; - - /* - * We need to search through the i2o_exec_wait_list to see if the given - * message is still outstanding. If not, it means that the IOP took - * longer to respond to the message than we had allowed and timer has - * already expired. Not much we can do about that except log it for - * debug purposes, increase timeout, and recompile. - */ - list_for_each_entry_safe(wait, tmp, &i2o_exec_wait_list, list) { - if (wait->tcntxt == context) { - spin_lock_irqsave(&wait->lock, flags); - - list_del(&wait->list); - - wait->m = m; - wait->msg = msg; - wait->complete = 1; - - if (wait->wq) - rc = 0; - else - rc = -1; - - spin_unlock_irqrestore(&wait->lock, flags); - - if (rc) { - struct device *dev; - - dev = &c->pdev->dev; - - pr_debug("%s: timedout reply received!\n", - c->name); - i2o_dma_free(dev, &wait->dma); - i2o_exec_wait_free(wait); - } else - wake_up_interruptible(wait->wq); - - return rc; - } - } - - osm_warn("%s: Bogus reply in POST WAIT (tr-context: %08x)!\n", c->name, - context); - - return -1; -}; - -/** - * i2o_exec_show_vendor_id - Displays Vendor ID of controller - * @d: device of which the Vendor ID should be displayed - * @attr: device_attribute to display - * @buf: buffer into which the Vendor ID should be printed - * - * Returns number of bytes printed into buffer. - */ -static ssize_t i2o_exec_show_vendor_id(struct device *d, - struct device_attribute *attr, char *buf) -{ - struct i2o_device *dev = to_i2o_device(d); - u16 id; - - if (!i2o_parm_field_get(dev, 0x0000, 0, &id, 2)) { - sprintf(buf, "0x%04x", le16_to_cpu(id)); - return strlen(buf) + 1; - } - - return 0; -}; - -/** - * i2o_exec_show_product_id - Displays Product ID of controller - * @d: device of which the Product ID should be displayed - * @attr: device_attribute to display - * @buf: buffer into which the Product ID should be printed - * - * Returns number of bytes printed into buffer. - */ -static ssize_t i2o_exec_show_product_id(struct device *d, - struct device_attribute *attr, - char *buf) -{ - struct i2o_device *dev = to_i2o_device(d); - u16 id; - - if (!i2o_parm_field_get(dev, 0x0000, 1, &id, 2)) { - sprintf(buf, "0x%04x", le16_to_cpu(id)); - return strlen(buf) + 1; - } - - return 0; -}; - -/* Exec-OSM device attributes */ -static DEVICE_ATTR(vendor_id, S_IRUGO, i2o_exec_show_vendor_id, NULL); -static DEVICE_ATTR(product_id, S_IRUGO, i2o_exec_show_product_id, NULL); - -/** - * i2o_exec_probe - Called if a new I2O device (executive class) appears - * @dev: I2O device which should be probed - * - * Registers event notification for every event from Executive device. The - * return is always 0, because we want all devices of class Executive. - * - * Returns 0 on success. - */ -static int i2o_exec_probe(struct device *dev) -{ - struct i2o_device *i2o_dev = to_i2o_device(dev); - int rc; - - rc = i2o_event_register(i2o_dev, &i2o_exec_driver, 0, 0xffffffff); - if (rc) goto err_out; - - rc = device_create_file(dev, &dev_attr_vendor_id); - if (rc) goto err_evtreg; - rc = device_create_file(dev, &dev_attr_product_id); - if (rc) goto err_vid; - - i2o_dev->iop->exec = i2o_dev; - - return 0; - -err_vid: - device_remove_file(dev, &dev_attr_vendor_id); -err_evtreg: - i2o_event_register(to_i2o_device(dev), &i2o_exec_driver, 0, 0); -err_out: - return rc; -}; - -/** - * i2o_exec_remove - Called on I2O device removal - * @dev: I2O device which was removed - * - * Unregisters event notification from Executive I2O device. - * - * Returns 0 on success. - */ -static int i2o_exec_remove(struct device *dev) -{ - device_remove_file(dev, &dev_attr_product_id); - device_remove_file(dev, &dev_attr_vendor_id); - - i2o_event_register(to_i2o_device(dev), &i2o_exec_driver, 0, 0); - - return 0; -}; - -#ifdef CONFIG_I2O_LCT_NOTIFY_ON_CHANGES -/** - * i2o_exec_lct_notify - Send a asynchronus LCT NOTIFY request - * @c: I2O controller to which the request should be send - * @change_ind: change indicator - * - * This function sends a LCT NOTIFY request to the I2O controller with - * the change indicator change_ind. If the change_ind == 0 the controller - * replies immediately after the request. If change_ind > 0 the reply is - * send after change indicator of the LCT is > change_ind. - */ -static int i2o_exec_lct_notify(struct i2o_controller *c, u32 change_ind) -{ - i2o_status_block *sb = c->status_block.virt; - struct device *dev; - struct i2o_message *msg; - - mutex_lock(&c->lct_lock); - - dev = &c->pdev->dev; - - if (i2o_dma_realloc(dev, &c->dlct, - le32_to_cpu(sb->expected_lct_size))) { - mutex_unlock(&c->lct_lock); - return -ENOMEM; - } - - msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET); - if (IS_ERR(msg)) { - mutex_unlock(&c->lct_lock); - return PTR_ERR(msg); - } - - msg->u.head[0] = cpu_to_le32(EIGHT_WORD_MSG_SIZE | SGL_OFFSET_6); - msg->u.head[1] = cpu_to_le32(I2O_CMD_LCT_NOTIFY << 24 | HOST_TID << 12 | - ADAPTER_TID); - msg->u.s.icntxt = cpu_to_le32(i2o_exec_driver.context); - msg->u.s.tcntxt = cpu_to_le32(0x00000000); - msg->body[0] = cpu_to_le32(0xffffffff); - msg->body[1] = cpu_to_le32(change_ind); - msg->body[2] = cpu_to_le32(0xd0000000 | c->dlct.len); - msg->body[3] = cpu_to_le32(c->dlct.phys); - - i2o_msg_post(c, msg); - - mutex_unlock(&c->lct_lock); - - return 0; -} -#endif - -/** - * i2o_exec_lct_modified - Called on LCT NOTIFY reply - * @_work: work struct for a specific controller - * - * This function handles asynchronus LCT NOTIFY replies. It parses the - * new LCT and if the buffer for the LCT was to small sends a LCT NOTIFY - * again, otherwise send LCT NOTIFY to get informed on next LCT change. - */ -static void i2o_exec_lct_modified(struct work_struct *_work) -{ - struct i2o_exec_lct_notify_work *work = - container_of(_work, struct i2o_exec_lct_notify_work, work); - u32 change_ind = 0; - struct i2o_controller *c = work->c; - - kfree(work); - - if (i2o_device_parse_lct(c) != -EAGAIN) - change_ind = c->lct->change_ind + 1; - -#ifdef CONFIG_I2O_LCT_NOTIFY_ON_CHANGES - i2o_exec_lct_notify(c, change_ind); -#endif -}; - -/** - * i2o_exec_reply - I2O Executive reply handler - * @c: I2O controller from which the reply comes - * @m: message id - * @msg: pointer to the I2O reply message - * - * This function is always called from interrupt context. If a POST WAIT - * reply was received, pass it to the complete function. If a LCT NOTIFY - * reply was received, a new event is created to handle the update. - * - * Returns 0 on success and if the reply should not be flushed or > 0 - * on success and if the reply should be flushed. Returns negative error - * code on failure and if the reply should be flushed. - */ -static int i2o_exec_reply(struct i2o_controller *c, u32 m, - struct i2o_message *msg) -{ - u32 context; - - if (le32_to_cpu(msg->u.head[0]) & MSG_FAIL) { - struct i2o_message __iomem *pmsg; - u32 pm; - - /* - * If Fail bit is set we must take the transaction context of - * the preserved message to find the right request again. - */ - - pm = le32_to_cpu(msg->body[3]); - pmsg = i2o_msg_in_to_virt(c, pm); - context = readl(&pmsg->u.s.tcntxt); - - i2o_report_status(KERN_INFO, "i2o_core", msg); - - /* Release the preserved msg */ - i2o_msg_nop_mfa(c, pm); - } else - context = le32_to_cpu(msg->u.s.tcntxt); - - if (context & 0x80000000) - return i2o_msg_post_wait_complete(c, m, msg, context); - - if ((le32_to_cpu(msg->u.head[1]) >> 24) == I2O_CMD_LCT_NOTIFY) { - struct i2o_exec_lct_notify_work *work; - - pr_debug("%s: LCT notify received\n", c->name); - - work = kmalloc(sizeof(*work), GFP_ATOMIC); - if (!work) - return -ENOMEM; - - work->c = c; - - INIT_WORK(&work->work, i2o_exec_lct_modified); - queue_work(i2o_exec_driver.event_queue, &work->work); - return 1; - } - - /* - * If this happens, we want to dump the message to the syslog so - * it can be sent back to the card manufacturer by the end user - * to aid in debugging. - * - */ - printk(KERN_WARNING "%s: Unsolicited message reply sent to core!" - "Message dumped to syslog\n", c->name); - i2o_dump_message(msg); - - return -EFAULT; -} - -/** - * i2o_exec_event - Event handling function - * @work: Work item in occurring event - * - * Handles events send by the Executive device. At the moment does not do - * anything useful. - */ -static void i2o_exec_event(struct work_struct *work) -{ - struct i2o_event *evt = container_of(work, struct i2o_event, work); - - if (likely(evt->i2o_dev)) - osm_debug("Event received from device: %d\n", - evt->i2o_dev->lct_data.tid); - kfree(evt); -}; - -/** - * i2o_exec_lct_get - Get the IOP's Logical Configuration Table - * @c: I2O controller from which the LCT should be fetched - * - * Send a LCT NOTIFY request to the controller, and wait - * I2O_TIMEOUT_LCT_GET seconds until arrival of response. If the LCT is - * to large, retry it. - * - * Returns 0 on success or negative error code on failure. - */ -int i2o_exec_lct_get(struct i2o_controller *c) -{ - struct i2o_message *msg; - int i = 0; - int rc = -EAGAIN; - - for (i = 1; i <= I2O_LCT_GET_TRIES; i++) { - msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET); - if (IS_ERR(msg)) - return PTR_ERR(msg); - - msg->u.head[0] = - cpu_to_le32(EIGHT_WORD_MSG_SIZE | SGL_OFFSET_6); - msg->u.head[1] = - cpu_to_le32(I2O_CMD_LCT_NOTIFY << 24 | HOST_TID << 12 | - ADAPTER_TID); - msg->body[0] = cpu_to_le32(0xffffffff); - msg->body[1] = cpu_to_le32(0x00000000); - msg->body[2] = cpu_to_le32(0xd0000000 | c->dlct.len); - msg->body[3] = cpu_to_le32(c->dlct.phys); - - rc = i2o_msg_post_wait(c, msg, I2O_TIMEOUT_LCT_GET); - if (rc < 0) - break; - - rc = i2o_device_parse_lct(c); - if (rc != -EAGAIN) - break; - } - - return rc; -} - -/* Exec OSM driver struct */ -struct i2o_driver i2o_exec_driver = { - .name = OSM_NAME, - .reply = i2o_exec_reply, - .event = i2o_exec_event, - .classes = i2o_exec_class_id, - .driver = { - .probe = i2o_exec_probe, - .remove = i2o_exec_remove, - }, -}; - -/** - * i2o_exec_init - Registers the Exec OSM - * - * Registers the Exec OSM in the I2O core. - * - * Returns 0 on success or negative error code on failure. - */ -int __init i2o_exec_init(void) -{ - return i2o_driver_register(&i2o_exec_driver); -}; - -/** - * i2o_exec_exit - Removes the Exec OSM - * - * Unregisters the Exec OSM from the I2O core. - */ -void i2o_exec_exit(void) -{ - i2o_driver_unregister(&i2o_exec_driver); -}; - -EXPORT_SYMBOL(i2o_msg_post_wait_mem); -EXPORT_SYMBOL(i2o_exec_lct_get); |