| /* |
| * Functions to handle I2O controllers and I2O message handling |
| * |
| * 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. |
| */ |
| |
| #include <linux/module.h> |
| #include "i2o.h" |
| #include <linux/delay.h> |
| #include <linux/sched.h> |
| #include <linux/slab.h> |
| #include "core.h" |
| |
| #define OSM_NAME "i2o" |
| #define OSM_VERSION "1.325" |
| #define OSM_DESCRIPTION "I2O subsystem" |
| |
| /* global I2O controller list */ |
| LIST_HEAD(i2o_controllers); |
| |
| /* |
| * global I2O System Table. Contains information about all the IOPs in the |
| * system. Used to inform IOPs about each others existence. |
| */ |
| static struct i2o_dma i2o_systab; |
| |
| static int i2o_hrt_get(struct i2o_controller *c); |
| |
| /** |
| * i2o_msg_get_wait - obtain an I2O message from the IOP |
| * @c: I2O controller |
| * @wait: how long to wait until timeout |
| * |
| * This function waits up to wait seconds for a message slot to be |
| * available. |
| * |
| * On a success the message is returned and the pointer to the message is |
| * set in msg. The returned message is the physical page frame offset |
| * address from the read port (see the i2o spec). If no message is |
| * available returns I2O_QUEUE_EMPTY and msg is leaved untouched. |
| */ |
| struct i2o_message *i2o_msg_get_wait(struct i2o_controller *c, int wait) |
| { |
| unsigned long timeout = jiffies + wait * HZ; |
| struct i2o_message *msg; |
| |
| while (IS_ERR(msg = i2o_msg_get(c))) { |
| if (time_after(jiffies, timeout)) { |
| osm_debug("%s: Timeout waiting for message frame.\n", |
| c->name); |
| return ERR_PTR(-ETIMEDOUT); |
| } |
| schedule_timeout_uninterruptible(1); |
| } |
| |
| return msg; |
| } |
| |
| #if BITS_PER_LONG == 64 |
| /** |
| * i2o_cntxt_list_add - Append a pointer to context list and return a id |
| * @c: controller to which the context list belong |
| * @ptr: pointer to add to the context list |
| * |
| * Because the context field in I2O is only 32-bit large, on 64-bit the |
| * pointer is to large to fit in the context field. The i2o_cntxt_list |
| * functions therefore map pointers to context fields. |
| * |
| * Returns context id > 0 on success or 0 on failure. |
| */ |
| u32 i2o_cntxt_list_add(struct i2o_controller * c, void *ptr) |
| { |
| struct i2o_context_list_element *entry; |
| unsigned long flags; |
| |
| if (!ptr) |
| osm_err("%s: couldn't add NULL pointer to context list!\n", |
| c->name); |
| |
| entry = kmalloc(sizeof(*entry), GFP_ATOMIC); |
| if (!entry) { |
| osm_err("%s: Could not allocate memory for context list element" |
| "\n", c->name); |
| return 0; |
| } |
| |
| entry->ptr = ptr; |
| entry->timestamp = jiffies; |
| INIT_LIST_HEAD(&entry->list); |
| |
| spin_lock_irqsave(&c->context_list_lock, flags); |
| |
| if (unlikely(atomic_inc_and_test(&c->context_list_counter))) |
| atomic_inc(&c->context_list_counter); |
| |
| entry->context = atomic_read(&c->context_list_counter); |
| |
| list_add(&entry->list, &c->context_list); |
| |
| spin_unlock_irqrestore(&c->context_list_lock, flags); |
| |
| osm_debug("%s: Add context to list %p -> %d\n", c->name, ptr, context); |
| |
| return entry->context; |
| } |
| |
| /** |
| * i2o_cntxt_list_remove - Remove a pointer from the context list |
| * @c: controller to which the context list belong |
| * @ptr: pointer which should be removed from the context list |
| * |
| * Removes a previously added pointer from the context list and returns |
| * the matching context id. |
| * |
| * Returns context id on success or 0 on failure. |
| */ |
| u32 i2o_cntxt_list_remove(struct i2o_controller * c, void *ptr) |
| { |
| struct i2o_context_list_element *entry; |
| u32 context = 0; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&c->context_list_lock, flags); |
| list_for_each_entry(entry, &c->context_list, list) |
| if (entry->ptr == ptr) { |
| list_del(&entry->list); |
| context = entry->context; |
| kfree(entry); |
| break; |
| } |
| spin_unlock_irqrestore(&c->context_list_lock, flags); |
| |
| if (!context) |
| osm_warn("%s: Could not remove nonexistent ptr %p\n", c->name, |
| ptr); |
| |
| osm_debug("%s: remove ptr from context list %d -> %p\n", c->name, |
| context, ptr); |
| |
| return context; |
| } |
| |
| /** |
| * i2o_cntxt_list_get - Get a pointer from the context list and remove it |
| * @c: controller to which the context list belong |
| * @context: context id to which the pointer belong |
| * |
| * Returns pointer to the matching context id on success or NULL on |
| * failure. |
| */ |
| void *i2o_cntxt_list_get(struct i2o_controller *c, u32 context) |
| { |
| struct i2o_context_list_element *entry; |
| unsigned long flags; |
| void *ptr = NULL; |
| |
| spin_lock_irqsave(&c->context_list_lock, flags); |
| list_for_each_entry(entry, &c->context_list, list) |
| if (entry->context == context) { |
| list_del(&entry->list); |
| ptr = entry->ptr; |
| kfree(entry); |
| break; |
| } |
| spin_unlock_irqrestore(&c->context_list_lock, flags); |
| |
| if (!ptr) |
| osm_warn("%s: context id %d not found\n", c->name, context); |
| |
| osm_debug("%s: get ptr from context list %d -> %p\n", c->name, context, |
| ptr); |
| |
| return ptr; |
| } |
| |
| /** |
| * i2o_cntxt_list_get_ptr - Get a context id from the context list |
| * @c: controller to which the context list belong |
| * @ptr: pointer to which the context id should be fetched |
| * |
| * Returns context id which matches to the pointer on success or 0 on |
| * failure. |
| */ |
| u32 i2o_cntxt_list_get_ptr(struct i2o_controller * c, void *ptr) |
| { |
| struct i2o_context_list_element *entry; |
| u32 context = 0; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&c->context_list_lock, flags); |
| list_for_each_entry(entry, &c->context_list, list) |
| if (entry->ptr == ptr) { |
| context = entry->context; |
| break; |
| } |
| spin_unlock_irqrestore(&c->context_list_lock, flags); |
| |
| if (!context) |
| osm_warn("%s: Could not find nonexistent ptr %p\n", c->name, |
| ptr); |
| |
| osm_debug("%s: get context id from context list %p -> %d\n", c->name, |
| ptr, context); |
| |
| return context; |
| } |
| #endif |
| |
| /** |
| * i2o_iop_find - Find an I2O controller by id |
| * @unit: unit number of the I2O controller to search for |
| * |
| * Lookup the I2O controller on the controller list. |
| * |
| * Returns pointer to the I2O controller on success or NULL if not found. |
| */ |
| struct i2o_controller *i2o_find_iop(int unit) |
| { |
| struct i2o_controller *c; |
| |
| list_for_each_entry(c, &i2o_controllers, list) { |
| if (c->unit == unit) |
| return c; |
| } |
| |
| return NULL; |
| } |
| |
| /** |
| * i2o_iop_find_device - Find a I2O device on an I2O controller |
| * @c: I2O controller where the I2O device hangs on |
| * @tid: TID of the I2O device to search for |
| * |
| * Searches the devices of the I2O controller for a device with TID tid and |
| * returns it. |
| * |
| * Returns a pointer to the I2O device if found, otherwise NULL. |
| */ |
| struct i2o_device *i2o_iop_find_device(struct i2o_controller *c, u16 tid) |
| { |
| struct i2o_device *dev; |
| |
| list_for_each_entry(dev, &c->devices, list) |
| if (dev->lct_data.tid == tid) |
| return dev; |
| |
| return NULL; |
| } |
| |
| /** |
| * i2o_quiesce_controller - quiesce controller |
| * @c: controller |
| * |
| * Quiesce an IOP. Causes IOP to make external operation quiescent |
| * (i2o 'READY' state). Internal operation of the IOP continues normally. |
| * |
| * Returns 0 on success or negative error code on failure. |
| */ |
| static int i2o_iop_quiesce(struct i2o_controller *c) |
| { |
| struct i2o_message *msg; |
| i2o_status_block *sb = c->status_block.virt; |
| int rc; |
| |
| i2o_status_get(c); |
| |
| /* SysQuiesce discarded if IOP not in READY or OPERATIONAL state */ |
| if ((sb->iop_state != ADAPTER_STATE_READY) && |
| (sb->iop_state != ADAPTER_STATE_OPERATIONAL)) |
| return 0; |
| |
| 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(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0); |
| msg->u.head[1] = |
| cpu_to_le32(I2O_CMD_SYS_QUIESCE << 24 | HOST_TID << 12 | |
| ADAPTER_TID); |
| |
| /* Long timeout needed for quiesce if lots of devices */ |
| rc = i2o_msg_post_wait(c, msg, 240); |
| if (rc) |
| osm_info("%s: Unable to quiesce (status=%#x).\n", c->name, -rc); |
| else |
| osm_debug("%s: Quiesced.\n", c->name); |
| |
| i2o_status_get(c); // Entered READY state |
| |
| return rc; |
| } |
| |
| /** |
| * i2o_iop_enable - move controller from ready to OPERATIONAL |
| * @c: I2O controller |
| * |
| * Enable IOP. This allows the IOP to resume external operations and |
| * reverses the effect of a quiesce. Returns zero or an error code if |
| * an error occurs. |
| */ |
| static int i2o_iop_enable(struct i2o_controller *c) |
| { |
| struct i2o_message *msg; |
| i2o_status_block *sb = c->status_block.virt; |
| int rc; |
| |
| i2o_status_get(c); |
| |
| /* Enable only allowed on READY state */ |
| if (sb->iop_state != ADAPTER_STATE_READY) |
| return -EINVAL; |
| |
| 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(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0); |
| msg->u.head[1] = |
| cpu_to_le32(I2O_CMD_SYS_ENABLE << 24 | HOST_TID << 12 | |
| ADAPTER_TID); |
| |
| /* How long of a timeout do we need? */ |
| rc = i2o_msg_post_wait(c, msg, 240); |
| if (rc) |
| osm_err("%s: Could not enable (status=%#x).\n", c->name, -rc); |
| else |
| osm_debug("%s: Enabled.\n", c->name); |
| |
| i2o_status_get(c); // entered OPERATIONAL state |
| |
| return rc; |
| } |
| |
| /** |
| * i2o_iop_quiesce_all - Quiesce all I2O controllers on the system |
| * |
| * Quiesce all I2O controllers which are connected to the system. |
| */ |
| static inline void i2o_iop_quiesce_all(void) |
| { |
| struct i2o_controller *c, *tmp; |
| |
| list_for_each_entry_safe(c, tmp, &i2o_controllers, list) { |
| if (!c->no_quiesce) |
| i2o_iop_quiesce(c); |
| } |
| } |
| |
| /** |
| * i2o_iop_enable_all - Enables all controllers on the system |
| * |
| * Enables all I2O controllers which are connected to the system. |
| */ |
| static inline void i2o_iop_enable_all(void) |
| { |
| struct i2o_controller *c, *tmp; |
| |
| list_for_each_entry_safe(c, tmp, &i2o_controllers, list) |
| i2o_iop_enable(c); |
| } |
| |
| /** |
| * i2o_clear_controller - Bring I2O controller into HOLD state |
| * @c: controller |
| * |
| * Clear an IOP to HOLD state, ie. terminate external operations, clear all |
| * input queues and prepare for a system restart. IOP's internal operation |
| * continues normally and the outbound queue is alive. The IOP is not |
| * expected to rebuild its LCT. |
| * |
| * Returns 0 on success or negative error code on failure. |
| */ |
| static int i2o_iop_clear(struct i2o_controller *c) |
| { |
| struct i2o_message *msg; |
| int rc; |
| |
| msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET); |
| if (IS_ERR(msg)) |
| return PTR_ERR(msg); |
| |
| /* Quiesce all IOPs first */ |
| i2o_iop_quiesce_all(); |
| |
| msg->u.head[0] = cpu_to_le32(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0); |
| msg->u.head[1] = |
| cpu_to_le32(I2O_CMD_ADAPTER_CLEAR << 24 | HOST_TID << 12 | |
| ADAPTER_TID); |
| |
| rc = i2o_msg_post_wait(c, msg, 30); |
| if (rc) |
| osm_info("%s: Unable to clear (status=%#x).\n", c->name, -rc); |
| else |
| osm_debug("%s: Cleared.\n", c->name); |
| |
| /* Enable all IOPs */ |
| i2o_iop_enable_all(); |
| |
| return rc; |
| } |
| |
| /** |
| * i2o_iop_init_outbound_queue - setup the outbound message queue |
| * @c: I2O controller |
| * |
| * Clear and (re)initialize IOP's outbound queue and post the message |
| * frames to the IOP. |
| * |
| * Returns 0 on success or negative error code on failure. |
| */ |
| static int i2o_iop_init_outbound_queue(struct i2o_controller *c) |
| { |
| u32 m; |
| volatile u8 *status = c->status.virt; |
| struct i2o_message *msg; |
| ulong timeout; |
| int i; |
| |
| osm_debug("%s: Initializing Outbound Queue...\n", c->name); |
| |
| memset(c->status.virt, 0, 4); |
| |
| 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_OUTBOUND_INIT << 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(PAGE_SIZE); |
| /* Outbound msg frame size in words and Initcode */ |
| msg->body[1] = cpu_to_le32(I2O_OUTBOUND_MSG_FRAME_SIZE << 16 | 0x80); |
| msg->body[2] = cpu_to_le32(0xd0000004); |
| msg->body[3] = cpu_to_le32(i2o_dma_low(c->status.phys)); |
| msg->body[4] = cpu_to_le32(i2o_dma_high(c->status.phys)); |
| |
| i2o_msg_post(c, msg); |
| |
| timeout = jiffies + I2O_TIMEOUT_INIT_OUTBOUND_QUEUE * HZ; |
| while (*status <= I2O_CMD_IN_PROGRESS) { |
| if (time_after(jiffies, timeout)) { |
| osm_warn("%s: Timeout Initializing\n", c->name); |
| return -ETIMEDOUT; |
| } |
| schedule_timeout_uninterruptible(1); |
| } |
| |
| m = c->out_queue.phys; |
| |
| /* Post frames */ |
| for (i = 0; i < I2O_MAX_OUTBOUND_MSG_FRAMES; i++) { |
| i2o_flush_reply(c, m); |
| udelay(1); /* Promise */ |
| m += I2O_OUTBOUND_MSG_FRAME_SIZE * sizeof(u32); |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * i2o_iop_reset - reset an I2O controller |
| * @c: controller to reset |
| * |
| * Reset the IOP into INIT state and wait until IOP gets into RESET state. |
| * Terminate all external operations, clear IOP's inbound and outbound |
| * queues, terminate all DDMs, and reload the IOP's operating environment |
| * and all local DDMs. The IOP rebuilds its LCT. |
| */ |
| static int i2o_iop_reset(struct i2o_controller *c) |
| { |
| volatile u8 *status = c->status.virt; |
| struct i2o_message *msg; |
| unsigned long timeout; |
| i2o_status_block *sb = c->status_block.virt; |
| int rc = 0; |
| |
| osm_debug("%s: Resetting controller\n", c->name); |
| |
| msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET); |
| if (IS_ERR(msg)) |
| return PTR_ERR(msg); |
| |
| memset(c->status_block.virt, 0, 8); |
| |
| /* Quiesce all IOPs first */ |
| i2o_iop_quiesce_all(); |
| |
| msg->u.head[0] = cpu_to_le32(EIGHT_WORD_MSG_SIZE | SGL_OFFSET_0); |
| msg->u.head[1] = |
| cpu_to_le32(I2O_CMD_ADAPTER_RESET << 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(0x00000000); |
| msg->body[1] = cpu_to_le32(0x00000000); |
| msg->body[2] = cpu_to_le32(i2o_dma_low(c->status.phys)); |
| msg->body[3] = cpu_to_le32(i2o_dma_high(c->status.phys)); |
| |
| i2o_msg_post(c, msg); |
| |
| /* Wait for a reply */ |
| timeout = jiffies + I2O_TIMEOUT_RESET * HZ; |
| while (!*status) { |
| if (time_after(jiffies, timeout)) |
| break; |
| |
| schedule_timeout_uninterruptible(1); |
| } |
| |
| switch (*status) { |
| case I2O_CMD_REJECTED: |
| osm_warn("%s: IOP reset rejected\n", c->name); |
| rc = -EPERM; |
| break; |
| |
| case I2O_CMD_IN_PROGRESS: |
| /* |
| * Once the reset is sent, the IOP goes into the INIT state |
| * which is indeterminate. We need to wait until the IOP has |
| * rebooted before we can let the system talk to it. We read |
| * the inbound Free_List until a message is available. If we |
| * can't read one in the given amount of time, we assume the |
| * IOP could not reboot properly. |
| */ |
| osm_debug("%s: Reset in progress, waiting for reboot...\n", |
| c->name); |
| |
| while (IS_ERR(msg = i2o_msg_get_wait(c, I2O_TIMEOUT_RESET))) { |
| if (time_after(jiffies, timeout)) { |
| osm_err("%s: IOP reset timeout.\n", c->name); |
| rc = PTR_ERR(msg); |
| goto exit; |
| } |
| schedule_timeout_uninterruptible(1); |
| } |
| i2o_msg_nop(c, msg); |
| |
| /* from here all quiesce commands are safe */ |
| c->no_quiesce = 0; |
| |
| /* verify if controller is in state RESET */ |
| i2o_status_get(c); |
| |
| if (!c->promise && (sb->iop_state != ADAPTER_STATE_RESET)) |
| osm_warn("%s: reset completed, but adapter not in RESET" |
| " state.\n", c->name); |
| else |
| osm_debug("%s: reset completed.\n", c->name); |
| |
| break; |
| |
| default: |
| osm_err("%s: IOP reset timeout.\n", c->name); |
| rc = -ETIMEDOUT; |
| break; |
| } |
| |
| exit: |
| /* Enable all IOPs */ |
| i2o_iop_enable_all(); |
| |
| return rc; |
| } |
| |
| /** |
| * i2o_iop_activate - Bring controller up to HOLD |
| * @c: controller |
| * |
| * This function brings an I2O controller into HOLD state. The adapter |
| * is reset if necessary and then the queues and resource table are read. |
| * |
| * Returns 0 on success or negative error code on failure. |
| */ |
| static int i2o_iop_activate(struct i2o_controller *c) |
| { |
| i2o_status_block *sb = c->status_block.virt; |
| int rc; |
| int state; |
| |
| /* In INIT state, Wait Inbound Q to initialize (in i2o_status_get) */ |
| /* In READY state, Get status */ |
| |
| rc = i2o_status_get(c); |
| if (rc) { |
| osm_info("%s: Unable to obtain status, attempting a reset.\n", |
| c->name); |
| rc = i2o_iop_reset(c); |
| if (rc) |
| return rc; |
| } |
| |
| if (sb->i2o_version > I2OVER15) { |
| osm_err("%s: Not running version 1.5 of the I2O Specification." |
| "\n", c->name); |
| return -ENODEV; |
| } |
| |
| switch (sb->iop_state) { |
| case ADAPTER_STATE_FAULTED: |
| osm_err("%s: hardware fault\n", c->name); |
| return -EFAULT; |
| |
| case ADAPTER_STATE_READY: |
| case ADAPTER_STATE_OPERATIONAL: |
| case ADAPTER_STATE_HOLD: |
| case ADAPTER_STATE_FAILED: |
| osm_debug("%s: already running, trying to reset...\n", c->name); |
| rc = i2o_iop_reset(c); |
| if (rc) |
| return rc; |
| } |
| |
| /* preserve state */ |
| state = sb->iop_state; |
| |
| rc = i2o_iop_init_outbound_queue(c); |
| if (rc) |
| return rc; |
| |
| /* if adapter was not in RESET state clear now */ |
| if (state != ADAPTER_STATE_RESET) |
| i2o_iop_clear(c); |
| |
| i2o_status_get(c); |
| |
| if (sb->iop_state != ADAPTER_STATE_HOLD) { |
| osm_err("%s: failed to bring IOP into HOLD state\n", c->name); |
| return -EIO; |
| } |
| |
| return i2o_hrt_get(c); |
| } |
| |
| static void i2o_res_alloc(struct i2o_controller *c, unsigned long flags) |
| { |
| i2o_status_block *sb = c->status_block.virt; |
| struct resource *res = &c->mem_resource; |
| resource_size_t size, align; |
| int err; |
| |
| res->name = c->pdev->bus->name; |
| res->flags = flags; |
| res->start = 0; |
| res->end = 0; |
| osm_info("%s: requires private memory resources.\n", c->name); |
| |
| if (flags & IORESOURCE_MEM) { |
| size = sb->desired_mem_size; |
| align = 1 << 20; /* unspecified, use 1Mb and play safe */ |
| } else { |
| size = sb->desired_io_size; |
| align = 1 << 12; /* unspecified, use 4Kb and play safe */ |
| } |
| |
| err = pci_bus_alloc_resource(c->pdev->bus, res, size, align, 0, 0, |
| NULL, NULL); |
| if (err < 0) |
| return; |
| |
| if (flags & IORESOURCE_MEM) { |
| c->mem_alloc = 1; |
| sb->current_mem_size = resource_size(res); |
| sb->current_mem_base = res->start; |
| } else if (flags & IORESOURCE_IO) { |
| c->io_alloc = 1; |
| sb->current_io_size = resource_size(res); |
| sb->current_io_base = res->start; |
| } |
| osm_info("%s: allocated PCI space %pR\n", c->name, res); |
| } |
| |
| /** |
| * i2o_iop_systab_set - Set the I2O System Table of the specified IOP |
| * @c: I2O controller to which the system table should be send |
| * |
| * Before the systab could be set i2o_systab_build() must be called. |
| * |
| * Returns 0 on success or negative error code on failure. |
| */ |
| static int i2o_iop_systab_set(struct i2o_controller *c) |
| { |
| struct i2o_message *msg; |
| i2o_status_block *sb = c->status_block.virt; |
| struct device *dev = &c->pdev->dev; |
| int rc; |
| |
| if (sb->current_mem_size < sb->desired_mem_size) |
| i2o_res_alloc(c, IORESOURCE_MEM); |
| |
| if (sb->current_io_size < sb->desired_io_size) |
| i2o_res_alloc(c, IORESOURCE_IO); |
| |
| msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET); |
| if (IS_ERR(msg)) |
| return PTR_ERR(msg); |
| |
| i2o_systab.phys = dma_map_single(dev, i2o_systab.virt, i2o_systab.len, |
| PCI_DMA_TODEVICE); |
| if (!i2o_systab.phys) { |
| i2o_msg_nop(c, msg); |
| return -ENOMEM; |
| } |
| |
| msg->u.head[0] = cpu_to_le32(I2O_MESSAGE_SIZE(12) | SGL_OFFSET_6); |
| msg->u.head[1] = |
| cpu_to_le32(I2O_CMD_SYS_TAB_SET << 24 | HOST_TID << 12 | |
| ADAPTER_TID); |
| |
| /* |
| * Provide three SGL-elements: |
| * System table (SysTab), Private memory space declaration and |
| * Private i/o space declaration |
| */ |
| |
| msg->body[0] = cpu_to_le32(c->unit + 2); |
| msg->body[1] = cpu_to_le32(0x00000000); |
| msg->body[2] = cpu_to_le32(0x54000000 | i2o_systab.len); |
| msg->body[3] = cpu_to_le32(i2o_systab.phys); |
| msg->body[4] = cpu_to_le32(0x54000000 | sb->current_mem_size); |
| msg->body[5] = cpu_to_le32(sb->current_mem_base); |
| msg->body[6] = cpu_to_le32(0xd4000000 | sb->current_io_size); |
| msg->body[6] = cpu_to_le32(sb->current_io_base); |
| |
| rc = i2o_msg_post_wait(c, msg, 120); |
| |
| dma_unmap_single(dev, i2o_systab.phys, i2o_systab.len, |
| PCI_DMA_TODEVICE); |
| |
| if (rc < 0) |
| osm_err("%s: Unable to set SysTab (status=%#x).\n", c->name, |
| -rc); |
| else |
| osm_debug("%s: SysTab set.\n", c->name); |
| |
| return rc; |
| } |
| |
| /** |
| * i2o_iop_online - Bring a controller online into OPERATIONAL state. |
| * @c: I2O controller |
| * |
| * Send the system table and enable the I2O controller. |
| * |
| * Returns 0 on success or negative error code on failure. |
| */ |
| static int i2o_iop_online(struct i2o_controller *c) |
| { |
| int rc; |
| |
| rc = i2o_iop_systab_set(c); |
| if (rc) |
| return rc; |
| |
| /* In READY state */ |
| osm_debug("%s: Attempting to enable...\n", c->name); |
| return i2o_iop_enable(c); |
| } |
| |
| /** |
| * i2o_iop_remove - Remove the I2O controller from the I2O core |
| * @c: I2O controller |
| * |
| * Remove the I2O controller from the I2O core. If devices are attached to |
| * the controller remove these also and finally reset the controller. |
| */ |
| void i2o_iop_remove(struct i2o_controller *c) |
| { |
| struct i2o_device *dev, *tmp; |
| |
| osm_debug("%s: deleting controller\n", c->name); |
| |
| i2o_driver_notify_controller_remove_all(c); |
| |
| list_del(&c->list); |
| |
| list_for_each_entry_safe(dev, tmp, &c->devices, list) |
| i2o_device_remove(dev); |
| |
| device_del(&c->device); |
| |
| /* Ask the IOP to switch to RESET state */ |
| i2o_iop_reset(c); |
| } |
| |
| /** |
| * i2o_systab_build - Build system table |
| * |
| * The system table contains information about all the IOPs in the system |
| * (duh) and is used by the Executives on the IOPs to establish peer2peer |
| * connections. We're not supporting peer2peer at the moment, but this |
| * will be needed down the road for things like lan2lan forwarding. |
| * |
| * Returns 0 on success or negative error code on failure. |
| */ |
| static int i2o_systab_build(void) |
| { |
| struct i2o_controller *c, *tmp; |
| int num_controllers = 0; |
| u32 change_ind = 0; |
| int count = 0; |
| struct i2o_sys_tbl *systab = i2o_systab.virt; |
| |
| list_for_each_entry_safe(c, tmp, &i2o_controllers, list) |
| num_controllers++; |
| |
| if (systab) { |
| change_ind = systab->change_ind; |
| kfree(i2o_systab.virt); |
| } |
| |
| /* Header + IOPs */ |
| i2o_systab.len = sizeof(struct i2o_sys_tbl) + num_controllers * |
| sizeof(struct i2o_sys_tbl_entry); |
| |
| systab = i2o_systab.virt = kzalloc(i2o_systab.len, GFP_KERNEL); |
| if (!systab) { |
| osm_err("unable to allocate memory for System Table\n"); |
| return -ENOMEM; |
| } |
| |
| systab->version = I2OVERSION; |
| systab->change_ind = change_ind + 1; |
| |
| list_for_each_entry_safe(c, tmp, &i2o_controllers, list) { |
| i2o_status_block *sb; |
| |
| if (count >= num_controllers) { |
| osm_err("controller added while building system table" |
| "\n"); |
| break; |
| } |
| |
| sb = c->status_block.virt; |
| |
| /* |
| * Get updated IOP state so we have the latest information |
| * |
| * We should delete the controller at this point if it |
| * doesn't respond since if it's not on the system table |
| * it is techninically not part of the I2O subsystem... |
| */ |
| if (unlikely(i2o_status_get(c))) { |
| osm_err("%s: Deleting b/c could not get status while " |
| "attempting to build system table\n", c->name); |
| i2o_iop_remove(c); |
| continue; // try the next one |
| } |
| |
| systab->iops[count].org_id = sb->org_id; |
| systab->iops[count].iop_id = c->unit + 2; |
| systab->iops[count].seg_num = 0; |
| systab->iops[count].i2o_version = sb->i2o_version; |
| systab->iops[count].iop_state = sb->iop_state; |
| systab->iops[count].msg_type = sb->msg_type; |
| systab->iops[count].frame_size = sb->inbound_frame_size; |
| systab->iops[count].last_changed = change_ind; |
| systab->iops[count].iop_capabilities = sb->iop_capabilities; |
| systab->iops[count].inbound_low = |
| i2o_dma_low(c->base.phys + I2O_IN_PORT); |
| systab->iops[count].inbound_high = |
| i2o_dma_high(c->base.phys + I2O_IN_PORT); |
| |
| count++; |
| } |
| |
| systab->num_entries = count; |
| |
| return 0; |
| } |
| |
| /** |
| * i2o_parse_hrt - Parse the hardware resource table. |
| * @c: I2O controller |
| * |
| * We don't do anything with it except dumping it (in debug mode). |
| * |
| * Returns 0. |
| */ |
| static int i2o_parse_hrt(struct i2o_controller *c) |
| { |
| i2o_dump_hrt(c); |
| return 0; |
| } |
| |
| /** |
| * i2o_status_get - Get the status block from the I2O controller |
| * @c: I2O controller |
| * |
| * Issue a status query on the controller. This updates the attached |
| * status block. The status block could then be accessed through |
| * c->status_block. |
| * |
| * Returns 0 on success or negative error code on failure. |
| */ |
| int i2o_status_get(struct i2o_controller *c) |
| { |
| struct i2o_message *msg; |
| volatile u8 *status_block; |
| unsigned long timeout; |
| |
| status_block = (u8 *) c->status_block.virt; |
| memset(c->status_block.virt, 0, sizeof(i2o_status_block)); |
| |
| 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(NINE_WORD_MSG_SIZE | SGL_OFFSET_0); |
| msg->u.head[1] = |
| cpu_to_le32(I2O_CMD_STATUS_GET << 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(0x00000000); |
| msg->body[1] = cpu_to_le32(0x00000000); |
| msg->body[2] = cpu_to_le32(i2o_dma_low(c->status_block.phys)); |
| msg->body[3] = cpu_to_le32(i2o_dma_high(c->status_block.phys)); |
| msg->body[4] = cpu_to_le32(sizeof(i2o_status_block)); /* always 88 bytes */ |
| |
| i2o_msg_post(c, msg); |
| |
| /* Wait for a reply */ |
| timeout = jiffies + I2O_TIMEOUT_STATUS_GET * HZ; |
| while (status_block[87] != 0xFF) { |
| if (time_after(jiffies, timeout)) { |
| osm_err("%s: Get status timeout.\n", c->name); |
| return -ETIMEDOUT; |
| } |
| |
| schedule_timeout_uninterruptible(1); |
| } |
| |
| #ifdef DEBUG |
| i2o_debug_state(c); |
| #endif |
| |
| return 0; |
| } |
| |
| /* |
| * i2o_hrt_get - Get the Hardware Resource Table from the I2O controller |
| * @c: I2O controller from which the HRT should be fetched |
| * |
| * The HRT contains information about possible hidden devices but is |
| * mostly useless to us. |
| * |
| * Returns 0 on success or negative error code on failure. |
| */ |
| static int i2o_hrt_get(struct i2o_controller *c) |
| { |
| int rc; |
| int i; |
| i2o_hrt *hrt = c->hrt.virt; |
| u32 size = sizeof(i2o_hrt); |
| struct device *dev = &c->pdev->dev; |
| |
| for (i = 0; i < I2O_HRT_GET_TRIES; i++) { |
| struct i2o_message *msg; |
| |
| 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(SIX_WORD_MSG_SIZE | SGL_OFFSET_4); |
| msg->u.head[1] = |
| cpu_to_le32(I2O_CMD_HRT_GET << 24 | HOST_TID << 12 | |
| ADAPTER_TID); |
| msg->body[0] = cpu_to_le32(0xd0000000 | c->hrt.len); |
| msg->body[1] = cpu_to_le32(c->hrt.phys); |
| |
| rc = i2o_msg_post_wait_mem(c, msg, 20, &c->hrt); |
| |
| if (rc < 0) { |
| osm_err("%s: Unable to get HRT (status=%#x)\n", c->name, |
| -rc); |
| return rc; |
| } |
| |
| size = hrt->num_entries * hrt->entry_len << 2; |
| if (size > c->hrt.len) { |
| if (i2o_dma_realloc(dev, &c->hrt, size)) |
| return -ENOMEM; |
| else |
| hrt = c->hrt.virt; |
| } else |
| return i2o_parse_hrt(c); |
| } |
| |
| osm_err("%s: Unable to get HRT after %d tries, giving up\n", c->name, |
| I2O_HRT_GET_TRIES); |
| |
| return -EBUSY; |
| } |
| |
| /** |
| * i2o_iop_release - release the memory for a I2O controller |
| * @dev: I2O controller which should be released |
| * |
| * Release the allocated memory. This function is called if refcount of |
| * device reaches 0 automatically. |
| */ |
| static void i2o_iop_release(struct device *dev) |
| { |
| struct i2o_controller *c = to_i2o_controller(dev); |
| |
| i2o_iop_free(c); |
| } |
| |
| /** |
| * i2o_iop_alloc - Allocate and initialize a i2o_controller struct |
| * |
| * Allocate the necessary memory for a i2o_controller struct and |
| * initialize the lists and message mempool. |
| * |
| * Returns a pointer to the I2O controller or a negative error code on |
| * failure. |
| */ |
| struct i2o_controller *i2o_iop_alloc(void) |
| { |
| static int unit; /* 0 and 1 are NULL IOP and Local Host */ |
| struct i2o_controller *c; |
| char poolname[32]; |
| |
| c = kzalloc(sizeof(*c), GFP_KERNEL); |
| if (!c) { |
| osm_err("i2o: Insufficient memory to allocate a I2O controller." |
| "\n"); |
| return ERR_PTR(-ENOMEM); |
| } |
| |
| c->unit = unit++; |
| sprintf(c->name, "iop%d", c->unit); |
| |
| snprintf(poolname, sizeof(poolname), "i2o_%s_msg_inpool", c->name); |
| if (i2o_pool_alloc |
| (&c->in_msg, poolname, I2O_INBOUND_MSG_FRAME_SIZE * 4 + sizeof(u32), |
| I2O_MSG_INPOOL_MIN)) { |
| kfree(c); |
| return ERR_PTR(-ENOMEM); |
| } |
| |
| INIT_LIST_HEAD(&c->devices); |
| spin_lock_init(&c->lock); |
| mutex_init(&c->lct_lock); |
| |
| device_initialize(&c->device); |
| |
| c->device.release = &i2o_iop_release; |
| |
| dev_set_name(&c->device, "iop%d", c->unit); |
| |
| #if BITS_PER_LONG == 64 |
| spin_lock_init(&c->context_list_lock); |
| atomic_set(&c->context_list_counter, 0); |
| INIT_LIST_HEAD(&c->context_list); |
| #endif |
| |
| return c; |
| } |
| |
| /** |
| * i2o_iop_add - Initialize the I2O controller and add him to the I2O core |
| * @c: controller |
| * |
| * Initialize the I2O controller and if no error occurs add him to the I2O |
| * core. |
| * |
| * Returns 0 on success or negative error code on failure. |
| */ |
| int i2o_iop_add(struct i2o_controller *c) |
| { |
| int rc; |
| |
| rc = device_add(&c->device); |
| if (rc) { |
| osm_err("%s: could not add controller\n", c->name); |
| goto iop_reset; |
| } |
| |
| osm_info("%s: Activating I2O controller...\n", c->name); |
| osm_info("%s: This may take a few minutes if there are many devices\n", |
| c->name); |
| |
| rc = i2o_iop_activate(c); |
| if (rc) { |
| osm_err("%s: could not activate controller\n", c->name); |
| goto device_del; |
| } |
| |
| osm_debug("%s: building sys table...\n", c->name); |
| |
| rc = i2o_systab_build(); |
| if (rc) |
| goto device_del; |
| |
| osm_debug("%s: online controller...\n", c->name); |
| |
| rc = i2o_iop_online(c); |
| if (rc) |
| goto device_del; |
| |
| osm_debug("%s: getting LCT...\n", c->name); |
| |
| rc = i2o_exec_lct_get(c); |
| if (rc) |
| goto device_del; |
| |
| list_add(&c->list, &i2o_controllers); |
| |
| i2o_driver_notify_controller_add_all(c); |
| |
| osm_info("%s: Controller added\n", c->name); |
| |
| return 0; |
| |
| device_del: |
| device_del(&c->device); |
| |
| iop_reset: |
| i2o_iop_reset(c); |
| |
| return rc; |
| } |
| |
| /** |
| * i2o_event_register - Turn on/off event notification for a I2O device |
| * @dev: I2O device which should receive the event registration request |
| * @drv: driver which want to get notified |
| * @tcntxt: transaction context to use with this notifier |
| * @evt_mask: mask of events |
| * |
| * Create and posts an event registration message to the task. No reply |
| * is waited for, or expected. If you do not want further notifications, |
| * call the i2o_event_register again with a evt_mask of 0. |
| * |
| * Returns 0 on success or negative error code on failure. |
| */ |
| int i2o_event_register(struct i2o_device *dev, struct i2o_driver *drv, |
| int tcntxt, u32 evt_mask) |
| { |
| struct i2o_controller *c = dev->iop; |
| struct i2o_message *msg; |
| |
| 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(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0); |
| msg->u.head[1] = |
| cpu_to_le32(I2O_CMD_UTIL_EVT_REGISTER << 24 | HOST_TID << 12 | dev-> |
| lct_data.tid); |
| msg->u.s.icntxt = cpu_to_le32(drv->context); |
| msg->u.s.tcntxt = cpu_to_le32(tcntxt); |
| msg->body[0] = cpu_to_le32(evt_mask); |
| |
| i2o_msg_post(c, msg); |
| |
| return 0; |
| } |
| |
| /** |
| * i2o_iop_init - I2O main initialization function |
| * |
| * Initialize the I2O drivers (OSM) functions, register the Executive OSM, |
| * initialize the I2O PCI part and finally initialize I2O device stuff. |
| * |
| * Returns 0 on success or negative error code on failure. |
| */ |
| static int __init i2o_iop_init(void) |
| { |
| int rc = 0; |
| |
| printk(KERN_INFO OSM_DESCRIPTION " v" OSM_VERSION "\n"); |
| |
| rc = i2o_driver_init(); |
| if (rc) |
| goto exit; |
| |
| rc = i2o_exec_init(); |
| if (rc) |
| goto driver_exit; |
| |
| rc = i2o_pci_init(); |
| if (rc) |
| goto exec_exit; |
| |
| return 0; |
| |
| exec_exit: |
| i2o_exec_exit(); |
| |
| driver_exit: |
| i2o_driver_exit(); |
| |
| exit: |
| return rc; |
| } |
| |
| /** |
| * i2o_iop_exit - I2O main exit function |
| * |
| * Removes I2O controllers from PCI subsystem and shut down OSMs. |
| */ |
| static void __exit i2o_iop_exit(void) |
| { |
| i2o_pci_exit(); |
| i2o_exec_exit(); |
| i2o_driver_exit(); |
| } |
| |
| module_init(i2o_iop_init); |
| module_exit(i2o_iop_exit); |
| |
| MODULE_AUTHOR("Red Hat Software"); |
| MODULE_LICENSE("GPL"); |
| MODULE_DESCRIPTION(OSM_DESCRIPTION); |
| MODULE_VERSION(OSM_VERSION); |
| |
| #if BITS_PER_LONG == 64 |
| EXPORT_SYMBOL(i2o_cntxt_list_add); |
| EXPORT_SYMBOL(i2o_cntxt_list_get); |
| EXPORT_SYMBOL(i2o_cntxt_list_remove); |
| EXPORT_SYMBOL(i2o_cntxt_list_get_ptr); |
| #endif |
| EXPORT_SYMBOL(i2o_msg_get_wait); |
| EXPORT_SYMBOL(i2o_find_iop); |
| EXPORT_SYMBOL(i2o_iop_find_device); |
| EXPORT_SYMBOL(i2o_event_register); |
| EXPORT_SYMBOL(i2o_status_get); |
| EXPORT_SYMBOL(i2o_controllers); |