diff options
Diffstat (limited to 'drivers/staging/i2o/iop.c')
| -rw-r--r-- | drivers/staging/i2o/iop.c | 1255 |
1 files changed, 0 insertions, 1255 deletions
diff --git a/drivers/staging/i2o/iop.c b/drivers/staging/i2o/iop.c deleted file mode 100644 index 23bdbe4aa480..000000000000 --- a/drivers/staging/i2o/iop.c +++ /dev/null @@ -1,1255 +0,0 @@ -/* - * 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 */ - if ((rc = i2o_msg_post_wait(c, msg, 240))) - 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? */ - if ((rc = i2o_msg_post_wait(c, msg, 240))) - 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); - - if ((rc = i2o_msg_post_wait(c, msg, 30))) - 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); - rc = i2o_iop_enable(c); - if (rc) - return rc; - - return 0; -}; - -/** - * 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); |