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* Functions to handle I2O controllers and I2O message handling
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* Copyright (C) 1999-2002 Red Hat Software
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* Written by Alan Cox, Building Number Three Ltd
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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* A lot of the I2O message side code from this is taken from the
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* Red Creek RCPCI45 adapter driver by Red Creek Communications
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* Juha SievƤnen <Juha.Sievanen@cs.Helsinki.FI>
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* Auvo HƤkkinen <Auvo.Hakkinen@cs.Helsinki.FI>
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* Deepak Saxena <deepak@plexity.net>
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* Boji T Kannanthanam <boji.t.kannanthanam@intel.com>
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* Alan Cox <alan@lxorguk.ukuu.org.uk>:
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* Ported to Linux 2.5.
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* Markus Lidel <Markus.Lidel@shadowconnect.com>:
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* Minor fixes for 2.6.
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#include <linux/module.h>
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#include <linux/i2o.h>
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#include <linux/delay.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#define OSM_NAME "i2o"
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#define OSM_VERSION "1.325"
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#define OSM_DESCRIPTION "I2O subsystem"
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/* global I2O controller list */
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LIST_HEAD(i2o_controllers);
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* global I2O System Table. Contains information about all the IOPs in the
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* system. Used to inform IOPs about each others existence.
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static struct i2o_dma i2o_systab;
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static int i2o_hrt_get(struct i2o_controller *c);
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* i2o_msg_get_wait - obtain an I2O message from the IOP
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* @wait: how long to wait until timeout
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* This function waits up to wait seconds for a message slot to be
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* On a success the message is returned and the pointer to the message is
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* set in msg. The returned message is the physical page frame offset
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* address from the read port (see the i2o spec). If no message is
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* available returns I2O_QUEUE_EMPTY and msg is leaved untouched.
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struct i2o_message *i2o_msg_get_wait(struct i2o_controller *c, int wait)
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unsigned long timeout = jiffies + wait * HZ;
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struct i2o_message *msg;
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while (IS_ERR(msg = i2o_msg_get(c))) {
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if (time_after(jiffies, timeout)) {
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osm_debug("%s: Timeout waiting for message frame.\n",
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return ERR_PTR(-ETIMEDOUT);
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schedule_timeout_uninterruptible(1);
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#if BITS_PER_LONG == 64
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* i2o_cntxt_list_add - Append a pointer to context list and return a id
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* @c: controller to which the context list belong
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* @ptr: pointer to add to the context list
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* Because the context field in I2O is only 32-bit large, on 64-bit the
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* pointer is to large to fit in the context field. The i2o_cntxt_list
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* functions therefore map pointers to context fields.
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* Returns context id > 0 on success or 0 on failure.
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u32 i2o_cntxt_list_add(struct i2o_controller * c, void *ptr)
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struct i2o_context_list_element *entry;
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osm_err("%s: couldn't add NULL pointer to context list!\n",
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entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
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osm_err("%s: Could not allocate memory for context list element"
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entry->timestamp = jiffies;
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INIT_LIST_HEAD(&entry->list);
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spin_lock_irqsave(&c->context_list_lock, flags);
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if (unlikely(atomic_inc_and_test(&c->context_list_counter)))
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atomic_inc(&c->context_list_counter);
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entry->context = atomic_read(&c->context_list_counter);
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list_add(&entry->list, &c->context_list);
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spin_unlock_irqrestore(&c->context_list_lock, flags);
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osm_debug("%s: Add context to list %p -> %d\n", c->name, ptr, context);
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return entry->context;
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* i2o_cntxt_list_remove - Remove a pointer from the context list
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* @c: controller to which the context list belong
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* @ptr: pointer which should be removed from the context list
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* Removes a previously added pointer from the context list and returns
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* the matching context id.
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* Returns context id on success or 0 on failure.
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u32 i2o_cntxt_list_remove(struct i2o_controller * c, void *ptr)
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struct i2o_context_list_element *entry;
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spin_lock_irqsave(&c->context_list_lock, flags);
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list_for_each_entry(entry, &c->context_list, list)
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if (entry->ptr == ptr) {
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list_del(&entry->list);
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context = entry->context;
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spin_unlock_irqrestore(&c->context_list_lock, flags);
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osm_warn("%s: Could not remove nonexistent ptr %p\n", c->name,
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osm_debug("%s: remove ptr from context list %d -> %p\n", c->name,
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* i2o_cntxt_list_get - Get a pointer from the context list and remove it
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* @c: controller to which the context list belong
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* @context: context id to which the pointer belong
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* Returns pointer to the matching context id on success or NULL on
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void *i2o_cntxt_list_get(struct i2o_controller *c, u32 context)
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struct i2o_context_list_element *entry;
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spin_lock_irqsave(&c->context_list_lock, flags);
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list_for_each_entry(entry, &c->context_list, list)
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if (entry->context == context) {
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list_del(&entry->list);
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spin_unlock_irqrestore(&c->context_list_lock, flags);
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osm_warn("%s: context id %d not found\n", c->name, context);
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osm_debug("%s: get ptr from context list %d -> %p\n", c->name, context,
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* i2o_cntxt_list_get_ptr - Get a context id from the context list
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* @c: controller to which the context list belong
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* @ptr: pointer to which the context id should be fetched
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* Returns context id which matches to the pointer on success or 0 on
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u32 i2o_cntxt_list_get_ptr(struct i2o_controller * c, void *ptr)
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struct i2o_context_list_element *entry;
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spin_lock_irqsave(&c->context_list_lock, flags);
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list_for_each_entry(entry, &c->context_list, list)
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if (entry->ptr == ptr) {
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context = entry->context;
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spin_unlock_irqrestore(&c->context_list_lock, flags);
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osm_warn("%s: Could not find nonexistent ptr %p\n", c->name,
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osm_debug("%s: get context id from context list %p -> %d\n", c->name,
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* i2o_iop_find - Find an I2O controller by id
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* @unit: unit number of the I2O controller to search for
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* Lookup the I2O controller on the controller list.
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* Returns pointer to the I2O controller on success or NULL if not found.
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struct i2o_controller *i2o_find_iop(int unit)
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struct i2o_controller *c;
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list_for_each_entry(c, &i2o_controllers, list) {
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* i2o_iop_find_device - Find a I2O device on an I2O controller
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* @c: I2O controller where the I2O device hangs on
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* @tid: TID of the I2O device to search for
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* Searches the devices of the I2O controller for a device with TID tid and
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* Returns a pointer to the I2O device if found, otherwise NULL.
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struct i2o_device *i2o_iop_find_device(struct i2o_controller *c, u16 tid)
262
struct i2o_device *dev;
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list_for_each_entry(dev, &c->devices, list)
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if (dev->lct_data.tid == tid)
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* i2o_quiesce_controller - quiesce controller
275
* Quiesce an IOP. Causes IOP to make external operation quiescent
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* (i2o 'READY' state). Internal operation of the IOP continues normally.
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* Returns 0 on success or negative error code on failure.
280
static int i2o_iop_quiesce(struct i2o_controller *c)
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struct i2o_message *msg;
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i2o_status_block *sb = c->status_block.virt;
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/* SysQuiesce discarded if IOP not in READY or OPERATIONAL state */
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if ((sb->iop_state != ADAPTER_STATE_READY) &&
290
(sb->iop_state != ADAPTER_STATE_OPERATIONAL))
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msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
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msg->u.head[0] = cpu_to_le32(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0);
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cpu_to_le32(I2O_CMD_SYS_QUIESCE << 24 | HOST_TID << 12 |
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/* Long timeout needed for quiesce if lots of devices */
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if ((rc = i2o_msg_post_wait(c, msg, 240)))
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osm_info("%s: Unable to quiesce (status=%#x).\n", c->name, -rc);
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osm_debug("%s: Quiesced.\n", c->name);
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i2o_status_get(c); // Entered READY state
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* i2o_iop_enable - move controller from ready to OPERATIONAL
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* Enable IOP. This allows the IOP to resume external operations and
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* reverses the effect of a quiesce. Returns zero or an error code if
321
static int i2o_iop_enable(struct i2o_controller *c)
323
struct i2o_message *msg;
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i2o_status_block *sb = c->status_block.virt;
329
/* Enable only allowed on READY state */
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if (sb->iop_state != ADAPTER_STATE_READY)
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msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
337
msg->u.head[0] = cpu_to_le32(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0);
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cpu_to_le32(I2O_CMD_SYS_ENABLE << 24 | HOST_TID << 12 |
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/* How long of a timeout do we need? */
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if ((rc = i2o_msg_post_wait(c, msg, 240)))
344
osm_err("%s: Could not enable (status=%#x).\n", c->name, -rc);
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osm_debug("%s: Enabled.\n", c->name);
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i2o_status_get(c); // entered OPERATIONAL state
354
* i2o_iop_quiesce_all - Quiesce all I2O controllers on the system
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* Quiesce all I2O controllers which are connected to the system.
358
static inline void i2o_iop_quiesce_all(void)
360
struct i2o_controller *c, *tmp;
362
list_for_each_entry_safe(c, tmp, &i2o_controllers, list) {
369
* i2o_iop_enable_all - Enables all controllers on the system
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* Enables all I2O controllers which are connected to the system.
373
static inline void i2o_iop_enable_all(void)
375
struct i2o_controller *c, *tmp;
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list_for_each_entry_safe(c, tmp, &i2o_controllers, list)
382
* i2o_clear_controller - Bring I2O controller into HOLD state
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* Clear an IOP to HOLD state, ie. terminate external operations, clear all
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* input queues and prepare for a system restart. IOP's internal operation
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* continues normally and the outbound queue is alive. The IOP is not
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* expected to rebuild its LCT.
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* Returns 0 on success or negative error code on failure.
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static int i2o_iop_clear(struct i2o_controller *c)
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struct i2o_message *msg;
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msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
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/* Quiesce all IOPs first */
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i2o_iop_quiesce_all();
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msg->u.head[0] = cpu_to_le32(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0);
406
cpu_to_le32(I2O_CMD_ADAPTER_CLEAR << 24 | HOST_TID << 12 |
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if ((rc = i2o_msg_post_wait(c, msg, 30)))
410
osm_info("%s: Unable to clear (status=%#x).\n", c->name, -rc);
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osm_debug("%s: Cleared.\n", c->name);
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/* Enable all IOPs */
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i2o_iop_enable_all();
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* i2o_iop_init_outbound_queue - setup the outbound message queue
424
* Clear and (re)initialize IOP's outbound queue and post the message
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* Returns 0 on success or negative error code on failure.
429
static int i2o_iop_init_outbound_queue(struct i2o_controller *c)
432
volatile u8 *status = c->status.virt;
433
struct i2o_message *msg;
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osm_debug("%s: Initializing Outbound Queue...\n", c->name);
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memset(c->status.virt, 0, 4);
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msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
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msg->u.head[0] = cpu_to_le32(EIGHT_WORD_MSG_SIZE | SGL_OFFSET_6);
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cpu_to_le32(I2O_CMD_OUTBOUND_INIT << 24 | HOST_TID << 12 |
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msg->u.s.icntxt = cpu_to_le32(i2o_exec_driver.context);
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msg->u.s.tcntxt = cpu_to_le32(0x00000000);
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msg->body[0] = cpu_to_le32(PAGE_SIZE);
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/* Outbound msg frame size in words and Initcode */
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msg->body[1] = cpu_to_le32(I2O_OUTBOUND_MSG_FRAME_SIZE << 16 | 0x80);
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msg->body[2] = cpu_to_le32(0xd0000004);
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msg->body[3] = cpu_to_le32(i2o_dma_low(c->status.phys));
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msg->body[4] = cpu_to_le32(i2o_dma_high(c->status.phys));
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i2o_msg_post(c, msg);
460
timeout = jiffies + I2O_TIMEOUT_INIT_OUTBOUND_QUEUE * HZ;
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while (*status <= I2O_CMD_IN_PROGRESS) {
462
if (time_after(jiffies, timeout)) {
463
osm_warn("%s: Timeout Initializing\n", c->name);
466
schedule_timeout_uninterruptible(1);
469
m = c->out_queue.phys;
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for (i = 0; i < I2O_MAX_OUTBOUND_MSG_FRAMES; i++) {
473
i2o_flush_reply(c, m);
474
udelay(1); /* Promise */
475
m += I2O_OUTBOUND_MSG_FRAME_SIZE * sizeof(u32);
482
* i2o_iop_reset - reset an I2O controller
483
* @c: controller to reset
485
* Reset the IOP into INIT state and wait until IOP gets into RESET state.
486
* Terminate all external operations, clear IOP's inbound and outbound
487
* queues, terminate all DDMs, and reload the IOP's operating environment
488
* and all local DDMs. The IOP rebuilds its LCT.
490
static int i2o_iop_reset(struct i2o_controller *c)
492
volatile u8 *status = c->status.virt;
493
struct i2o_message *msg;
494
unsigned long timeout;
495
i2o_status_block *sb = c->status_block.virt;
498
osm_debug("%s: Resetting controller\n", c->name);
500
msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
504
memset(c->status_block.virt, 0, 8);
506
/* Quiesce all IOPs first */
507
i2o_iop_quiesce_all();
509
msg->u.head[0] = cpu_to_le32(EIGHT_WORD_MSG_SIZE | SGL_OFFSET_0);
511
cpu_to_le32(I2O_CMD_ADAPTER_RESET << 24 | HOST_TID << 12 |
513
msg->u.s.icntxt = cpu_to_le32(i2o_exec_driver.context);
514
msg->u.s.tcntxt = cpu_to_le32(0x00000000);
515
msg->body[0] = cpu_to_le32(0x00000000);
516
msg->body[1] = cpu_to_le32(0x00000000);
517
msg->body[2] = cpu_to_le32(i2o_dma_low(c->status.phys));
518
msg->body[3] = cpu_to_le32(i2o_dma_high(c->status.phys));
520
i2o_msg_post(c, msg);
522
/* Wait for a reply */
523
timeout = jiffies + I2O_TIMEOUT_RESET * HZ;
525
if (time_after(jiffies, timeout))
528
schedule_timeout_uninterruptible(1);
532
case I2O_CMD_REJECTED:
533
osm_warn("%s: IOP reset rejected\n", c->name);
537
case I2O_CMD_IN_PROGRESS:
539
* Once the reset is sent, the IOP goes into the INIT state
540
* which is indeterminate. We need to wait until the IOP has
541
* rebooted before we can let the system talk to it. We read
542
* the inbound Free_List until a message is available. If we
543
* can't read one in the given amount of time, we assume the
544
* IOP could not reboot properly.
546
osm_debug("%s: Reset in progress, waiting for reboot...\n",
549
while (IS_ERR(msg = i2o_msg_get_wait(c, I2O_TIMEOUT_RESET))) {
550
if (time_after(jiffies, timeout)) {
551
osm_err("%s: IOP reset timeout.\n", c->name);
555
schedule_timeout_uninterruptible(1);
559
/* from here all quiesce commands are safe */
562
/* verify if controller is in state RESET */
565
if (!c->promise && (sb->iop_state != ADAPTER_STATE_RESET))
566
osm_warn("%s: reset completed, but adapter not in RESET"
567
" state.\n", c->name);
569
osm_debug("%s: reset completed.\n", c->name);
574
osm_err("%s: IOP reset timeout.\n", c->name);
580
/* Enable all IOPs */
581
i2o_iop_enable_all();
587
* i2o_iop_activate - Bring controller up to HOLD
590
* This function brings an I2O controller into HOLD state. The adapter
591
* is reset if necessary and then the queues and resource table are read.
593
* Returns 0 on success or negative error code on failure.
595
static int i2o_iop_activate(struct i2o_controller *c)
597
i2o_status_block *sb = c->status_block.virt;
601
/* In INIT state, Wait Inbound Q to initialize (in i2o_status_get) */
602
/* In READY state, Get status */
604
rc = i2o_status_get(c);
606
osm_info("%s: Unable to obtain status, attempting a reset.\n",
608
rc = i2o_iop_reset(c);
613
if (sb->i2o_version > I2OVER15) {
614
osm_err("%s: Not running version 1.5 of the I2O Specification."
619
switch (sb->iop_state) {
620
case ADAPTER_STATE_FAULTED:
621
osm_err("%s: hardware fault\n", c->name);
624
case ADAPTER_STATE_READY:
625
case ADAPTER_STATE_OPERATIONAL:
626
case ADAPTER_STATE_HOLD:
627
case ADAPTER_STATE_FAILED:
628
osm_debug("%s: already running, trying to reset...\n", c->name);
629
rc = i2o_iop_reset(c);
635
state = sb->iop_state;
637
rc = i2o_iop_init_outbound_queue(c);
641
/* if adapter was not in RESET state clear now */
642
if (state != ADAPTER_STATE_RESET)
647
if (sb->iop_state != ADAPTER_STATE_HOLD) {
648
osm_err("%s: failed to bring IOP into HOLD state\n", c->name);
652
return i2o_hrt_get(c);
656
* i2o_iop_systab_set - Set the I2O System Table of the specified IOP
657
* @c: I2O controller to which the system table should be send
659
* Before the systab could be set i2o_systab_build() must be called.
661
* Returns 0 on success or negative error code on failure.
663
static int i2o_iop_systab_set(struct i2o_controller *c)
665
struct i2o_message *msg;
666
i2o_status_block *sb = c->status_block.virt;
667
struct device *dev = &c->pdev->dev;
668
struct resource *root;
671
if (sb->current_mem_size < sb->desired_mem_size) {
672
struct resource *res = &c->mem_resource;
673
res->name = c->pdev->bus->name;
674
res->flags = IORESOURCE_MEM;
677
osm_info("%s: requires private memory resources.\n", c->name);
678
root = pci_find_parent_resource(c->pdev, res);
680
osm_warn("%s: Can't find parent resource!\n", c->name);
681
if (root && allocate_resource(root, res, sb->desired_mem_size, sb->desired_mem_size, sb->desired_mem_size, 1 << 20, /* Unspecified, so use 1Mb and play safe */
684
sb->current_mem_size = resource_size(res);
685
sb->current_mem_base = res->start;
686
osm_info("%s: allocated %llu bytes of PCI memory at "
687
"0x%016llX.\n", c->name,
688
(unsigned long long)resource_size(res),
689
(unsigned long long)res->start);
693
if (sb->current_io_size < sb->desired_io_size) {
694
struct resource *res = &c->io_resource;
695
res->name = c->pdev->bus->name;
696
res->flags = IORESOURCE_IO;
699
osm_info("%s: requires private memory resources.\n", c->name);
700
root = pci_find_parent_resource(c->pdev, res);
702
osm_warn("%s: Can't find parent resource!\n", c->name);
703
if (root && allocate_resource(root, res, sb->desired_io_size, sb->desired_io_size, sb->desired_io_size, 1 << 20, /* Unspecified, so use 1Mb and play safe */
706
sb->current_io_size = resource_size(res);
707
sb->current_mem_base = res->start;
708
osm_info("%s: allocated %llu bytes of PCI I/O at "
709
"0x%016llX.\n", c->name,
710
(unsigned long long)resource_size(res),
711
(unsigned long long)res->start);
715
msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
719
i2o_systab.phys = dma_map_single(dev, i2o_systab.virt, i2o_systab.len,
721
if (!i2o_systab.phys) {
726
msg->u.head[0] = cpu_to_le32(I2O_MESSAGE_SIZE(12) | SGL_OFFSET_6);
728
cpu_to_le32(I2O_CMD_SYS_TAB_SET << 24 | HOST_TID << 12 |
732
* Provide three SGL-elements:
733
* System table (SysTab), Private memory space declaration and
734
* Private i/o space declaration
737
msg->body[0] = cpu_to_le32(c->unit + 2);
738
msg->body[1] = cpu_to_le32(0x00000000);
739
msg->body[2] = cpu_to_le32(0x54000000 | i2o_systab.len);
740
msg->body[3] = cpu_to_le32(i2o_systab.phys);
741
msg->body[4] = cpu_to_le32(0x54000000 | sb->current_mem_size);
742
msg->body[5] = cpu_to_le32(sb->current_mem_base);
743
msg->body[6] = cpu_to_le32(0xd4000000 | sb->current_io_size);
744
msg->body[6] = cpu_to_le32(sb->current_io_base);
746
rc = i2o_msg_post_wait(c, msg, 120);
748
dma_unmap_single(dev, i2o_systab.phys, i2o_systab.len,
752
osm_err("%s: Unable to set SysTab (status=%#x).\n", c->name,
755
osm_debug("%s: SysTab set.\n", c->name);
761
* i2o_iop_online - Bring a controller online into OPERATIONAL state.
764
* Send the system table and enable the I2O controller.
766
* Returns 0 on success or negative error code on failure.
768
static int i2o_iop_online(struct i2o_controller *c)
772
rc = i2o_iop_systab_set(c);
777
osm_debug("%s: Attempting to enable...\n", c->name);
778
rc = i2o_iop_enable(c);
786
* i2o_iop_remove - Remove the I2O controller from the I2O core
789
* Remove the I2O controller from the I2O core. If devices are attached to
790
* the controller remove these also and finally reset the controller.
792
void i2o_iop_remove(struct i2o_controller *c)
794
struct i2o_device *dev, *tmp;
796
osm_debug("%s: deleting controller\n", c->name);
798
i2o_driver_notify_controller_remove_all(c);
802
list_for_each_entry_safe(dev, tmp, &c->devices, list)
803
i2o_device_remove(dev);
805
device_del(&c->device);
807
/* Ask the IOP to switch to RESET state */
812
* i2o_systab_build - Build system table
814
* The system table contains information about all the IOPs in the system
815
* (duh) and is used by the Executives on the IOPs to establish peer2peer
816
* connections. We're not supporting peer2peer at the moment, but this
817
* will be needed down the road for things like lan2lan forwarding.
819
* Returns 0 on success or negative error code on failure.
821
static int i2o_systab_build(void)
823
struct i2o_controller *c, *tmp;
824
int num_controllers = 0;
827
struct i2o_sys_tbl *systab = i2o_systab.virt;
829
list_for_each_entry_safe(c, tmp, &i2o_controllers, list)
833
change_ind = systab->change_ind;
834
kfree(i2o_systab.virt);
838
i2o_systab.len = sizeof(struct i2o_sys_tbl) + num_controllers *
839
sizeof(struct i2o_sys_tbl_entry);
841
systab = i2o_systab.virt = kzalloc(i2o_systab.len, GFP_KERNEL);
843
osm_err("unable to allocate memory for System Table\n");
847
systab->version = I2OVERSION;
848
systab->change_ind = change_ind + 1;
850
list_for_each_entry_safe(c, tmp, &i2o_controllers, list) {
851
i2o_status_block *sb;
853
if (count >= num_controllers) {
854
osm_err("controller added while building system table"
859
sb = c->status_block.virt;
862
* Get updated IOP state so we have the latest information
864
* We should delete the controller at this point if it
865
* doesn't respond since if it's not on the system table
866
* it is techninically not part of the I2O subsystem...
868
if (unlikely(i2o_status_get(c))) {
869
osm_err("%s: Deleting b/c could not get status while "
870
"attempting to build system table\n", c->name);
872
continue; // try the next one
875
systab->iops[count].org_id = sb->org_id;
876
systab->iops[count].iop_id = c->unit + 2;
877
systab->iops[count].seg_num = 0;
878
systab->iops[count].i2o_version = sb->i2o_version;
879
systab->iops[count].iop_state = sb->iop_state;
880
systab->iops[count].msg_type = sb->msg_type;
881
systab->iops[count].frame_size = sb->inbound_frame_size;
882
systab->iops[count].last_changed = change_ind;
883
systab->iops[count].iop_capabilities = sb->iop_capabilities;
884
systab->iops[count].inbound_low =
885
i2o_dma_low(c->base.phys + I2O_IN_PORT);
886
systab->iops[count].inbound_high =
887
i2o_dma_high(c->base.phys + I2O_IN_PORT);
892
systab->num_entries = count;
898
* i2o_parse_hrt - Parse the hardware resource table.
901
* We don't do anything with it except dumping it (in debug mode).
905
static int i2o_parse_hrt(struct i2o_controller *c)
912
* i2o_status_get - Get the status block from the I2O controller
915
* Issue a status query on the controller. This updates the attached
916
* status block. The status block could then be accessed through
919
* Returns 0 on success or negative error code on failure.
921
int i2o_status_get(struct i2o_controller *c)
923
struct i2o_message *msg;
924
volatile u8 *status_block;
925
unsigned long timeout;
927
status_block = (u8 *) c->status_block.virt;
928
memset(c->status_block.virt, 0, sizeof(i2o_status_block));
930
msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
934
msg->u.head[0] = cpu_to_le32(NINE_WORD_MSG_SIZE | SGL_OFFSET_0);
936
cpu_to_le32(I2O_CMD_STATUS_GET << 24 | HOST_TID << 12 |
938
msg->u.s.icntxt = cpu_to_le32(i2o_exec_driver.context);
939
msg->u.s.tcntxt = cpu_to_le32(0x00000000);
940
msg->body[0] = cpu_to_le32(0x00000000);
941
msg->body[1] = cpu_to_le32(0x00000000);
942
msg->body[2] = cpu_to_le32(i2o_dma_low(c->status_block.phys));
943
msg->body[3] = cpu_to_le32(i2o_dma_high(c->status_block.phys));
944
msg->body[4] = cpu_to_le32(sizeof(i2o_status_block)); /* always 88 bytes */
946
i2o_msg_post(c, msg);
948
/* Wait for a reply */
949
timeout = jiffies + I2O_TIMEOUT_STATUS_GET * HZ;
950
while (status_block[87] != 0xFF) {
951
if (time_after(jiffies, timeout)) {
952
osm_err("%s: Get status timeout.\n", c->name);
956
schedule_timeout_uninterruptible(1);
967
* i2o_hrt_get - Get the Hardware Resource Table from the I2O controller
968
* @c: I2O controller from which the HRT should be fetched
970
* The HRT contains information about possible hidden devices but is
971
* mostly useless to us.
973
* Returns 0 on success or negative error code on failure.
975
static int i2o_hrt_get(struct i2o_controller *c)
979
i2o_hrt *hrt = c->hrt.virt;
980
u32 size = sizeof(i2o_hrt);
981
struct device *dev = &c->pdev->dev;
983
for (i = 0; i < I2O_HRT_GET_TRIES; i++) {
984
struct i2o_message *msg;
986
msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
990
msg->u.head[0] = cpu_to_le32(SIX_WORD_MSG_SIZE | SGL_OFFSET_4);
992
cpu_to_le32(I2O_CMD_HRT_GET << 24 | HOST_TID << 12 |
994
msg->body[0] = cpu_to_le32(0xd0000000 | c->hrt.len);
995
msg->body[1] = cpu_to_le32(c->hrt.phys);
997
rc = i2o_msg_post_wait_mem(c, msg, 20, &c->hrt);
1000
osm_err("%s: Unable to get HRT (status=%#x)\n", c->name,
1005
size = hrt->num_entries * hrt->entry_len << 2;
1006
if (size > c->hrt.len) {
1007
if (i2o_dma_realloc(dev, &c->hrt, size))
1012
return i2o_parse_hrt(c);
1015
osm_err("%s: Unable to get HRT after %d tries, giving up\n", c->name,
1022
* i2o_iop_release - release the memory for a I2O controller
1023
* @dev: I2O controller which should be released
1025
* Release the allocated memory. This function is called if refcount of
1026
* device reaches 0 automatically.
1028
static void i2o_iop_release(struct device *dev)
1030
struct i2o_controller *c = to_i2o_controller(dev);
1036
* i2o_iop_alloc - Allocate and initialize a i2o_controller struct
1038
* Allocate the necessary memory for a i2o_controller struct and
1039
* initialize the lists and message mempool.
1041
* Returns a pointer to the I2O controller or a negative error code on
1044
struct i2o_controller *i2o_iop_alloc(void)
1046
static int unit = 0; /* 0 and 1 are NULL IOP and Local Host */
1047
struct i2o_controller *c;
1050
c = kzalloc(sizeof(*c), GFP_KERNEL);
1052
osm_err("i2o: Insufficient memory to allocate a I2O controller."
1054
return ERR_PTR(-ENOMEM);
1058
sprintf(c->name, "iop%d", c->unit);
1060
snprintf(poolname, sizeof(poolname), "i2o_%s_msg_inpool", c->name);
1062
(&c->in_msg, poolname, I2O_INBOUND_MSG_FRAME_SIZE * 4 + sizeof(u32),
1063
I2O_MSG_INPOOL_MIN)) {
1065
return ERR_PTR(-ENOMEM);
1068
INIT_LIST_HEAD(&c->devices);
1069
spin_lock_init(&c->lock);
1070
mutex_init(&c->lct_lock);
1072
device_initialize(&c->device);
1074
c->device.release = &i2o_iop_release;
1076
dev_set_name(&c->device, "iop%d", c->unit);
1078
#if BITS_PER_LONG == 64
1079
spin_lock_init(&c->context_list_lock);
1080
atomic_set(&c->context_list_counter, 0);
1081
INIT_LIST_HEAD(&c->context_list);
1088
* i2o_iop_add - Initialize the I2O controller and add him to the I2O core
1091
* Initialize the I2O controller and if no error occurs add him to the I2O
1094
* Returns 0 on success or negative error code on failure.
1096
int i2o_iop_add(struct i2o_controller *c)
1100
if ((rc = device_add(&c->device))) {
1101
osm_err("%s: could not add controller\n", c->name);
1105
osm_info("%s: Activating I2O controller...\n", c->name);
1106
osm_info("%s: This may take a few minutes if there are many devices\n",
1109
if ((rc = i2o_iop_activate(c))) {
1110
osm_err("%s: could not activate controller\n", c->name);
1114
osm_debug("%s: building sys table...\n", c->name);
1116
if ((rc = i2o_systab_build()))
1119
osm_debug("%s: online controller...\n", c->name);
1121
if ((rc = i2o_iop_online(c)))
1124
osm_debug("%s: getting LCT...\n", c->name);
1126
if ((rc = i2o_exec_lct_get(c)))
1129
list_add(&c->list, &i2o_controllers);
1131
i2o_driver_notify_controller_add_all(c);
1133
osm_info("%s: Controller added\n", c->name);
1138
device_del(&c->device);
1147
* i2o_event_register - Turn on/off event notification for a I2O device
1148
* @dev: I2O device which should receive the event registration request
1149
* @drv: driver which want to get notified
1150
* @tcntxt: transaction context to use with this notifier
1151
* @evt_mask: mask of events
1153
* Create and posts an event registration message to the task. No reply
1154
* is waited for, or expected. If you do not want further notifications,
1155
* call the i2o_event_register again with a evt_mask of 0.
1157
* Returns 0 on success or negative error code on failure.
1159
int i2o_event_register(struct i2o_device *dev, struct i2o_driver *drv,
1160
int tcntxt, u32 evt_mask)
1162
struct i2o_controller *c = dev->iop;
1163
struct i2o_message *msg;
1165
msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
1167
return PTR_ERR(msg);
1169
msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0);
1171
cpu_to_le32(I2O_CMD_UTIL_EVT_REGISTER << 24 | HOST_TID << 12 | dev->
1173
msg->u.s.icntxt = cpu_to_le32(drv->context);
1174
msg->u.s.tcntxt = cpu_to_le32(tcntxt);
1175
msg->body[0] = cpu_to_le32(evt_mask);
1177
i2o_msg_post(c, msg);
1183
* i2o_iop_init - I2O main initialization function
1185
* Initialize the I2O drivers (OSM) functions, register the Executive OSM,
1186
* initialize the I2O PCI part and finally initialize I2O device stuff.
1188
* Returns 0 on success or negative error code on failure.
1190
static int __init i2o_iop_init(void)
1194
printk(KERN_INFO OSM_DESCRIPTION " v" OSM_VERSION "\n");
1196
if ((rc = i2o_driver_init()))
1199
if ((rc = i2o_exec_init()))
1202
if ((rc = i2o_pci_init()))
1218
* i2o_iop_exit - I2O main exit function
1220
* Removes I2O controllers from PCI subsystem and shut down OSMs.
1222
static void __exit i2o_iop_exit(void)
1229
module_init(i2o_iop_init);
1230
module_exit(i2o_iop_exit);
1232
MODULE_AUTHOR("Red Hat Software");
1233
MODULE_LICENSE("GPL");
1234
MODULE_DESCRIPTION(OSM_DESCRIPTION);
1235
MODULE_VERSION(OSM_VERSION);
1237
#if BITS_PER_LONG == 64
1238
EXPORT_SYMBOL(i2o_cntxt_list_add);
1239
EXPORT_SYMBOL(i2o_cntxt_list_get);
1240
EXPORT_SYMBOL(i2o_cntxt_list_remove);
1241
EXPORT_SYMBOL(i2o_cntxt_list_get_ptr);
1243
EXPORT_SYMBOL(i2o_msg_get_wait);
1244
EXPORT_SYMBOL(i2o_find_iop);
1245
EXPORT_SYMBOL(i2o_iop_find_device);
1246
EXPORT_SYMBOL(i2o_event_register);
1247
EXPORT_SYMBOL(i2o_status_get);
1248
EXPORT_SYMBOL(i2o_controllers);