diff options
Diffstat (limited to 'drivers/staging/i2o/device.c')
| -rw-r--r-- | drivers/staging/i2o/device.c | 592 |
1 files changed, 0 insertions, 592 deletions
diff --git a/drivers/staging/i2o/device.c b/drivers/staging/i2o/device.c deleted file mode 100644 index e47496cb0ac2..000000000000 --- a/drivers/staging/i2o/device.c +++ /dev/null @@ -1,592 +0,0 @@ -/* - * Functions to handle I2O devices - * - * Copyright (C) 2004 Markus Lidel <Markus.Lidel@shadowconnect.com> - * - * 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. - * - * Fixes/additions: - * Markus Lidel <Markus.Lidel@shadowconnect.com> - * initial version. - */ - -#include <linux/module.h> -#include "i2o.h" -#include <linux/delay.h> -#include <linux/string.h> -#include <linux/slab.h> -#include "core.h" - -/** - * i2o_device_issue_claim - claim or release a device - * @dev: I2O device to claim or release - * @cmd: claim or release command - * @type: type of claim - * - * Issue I2O UTIL_CLAIM or UTIL_RELEASE messages. The message to be sent - * is set by cmd. dev is the I2O device which should be claim or - * released and the type is the claim type (see the I2O spec). - * - * Returs 0 on success or negative error code on failure. - */ -static inline int i2o_device_issue_claim(struct i2o_device *dev, u32 cmd, - u32 type) -{ - struct i2o_message *msg; - - msg = i2o_msg_get_wait(dev->iop, 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(cmd << 24 | HOST_TID << 12 | dev->lct_data.tid); - msg->body[0] = cpu_to_le32(type); - - return i2o_msg_post_wait(dev->iop, msg, 60); -} - -/** - * i2o_device_claim - claim a device for use by an OSM - * @dev: I2O device to claim - * - * Do the leg work to assign a device to a given OSM. If the claim succeeds, - * the owner is the primary. If the attempt fails a negative errno code - * is returned. On success zero is returned. - */ -int i2o_device_claim(struct i2o_device *dev) -{ - int rc = 0; - - mutex_lock(&dev->lock); - - rc = i2o_device_issue_claim(dev, I2O_CMD_UTIL_CLAIM, I2O_CLAIM_PRIMARY); - if (!rc) - pr_debug("i2o: claim of device %d succeeded\n", - dev->lct_data.tid); - else - pr_debug("i2o: claim of device %d failed %d\n", - dev->lct_data.tid, rc); - - mutex_unlock(&dev->lock); - - return rc; -} - -/** - * i2o_device_claim_release - release a device that the OSM is using - * @dev: device to release - * - * Drop a claim by an OSM on a given I2O device. - * - * AC - some devices seem to want to refuse an unclaim until they have - * finished internal processing. It makes sense since you don't want a - * new device to go reconfiguring the entire system until you are done. - * Thus we are prepared to wait briefly. - * - * Returns 0 on success or negative error code on failure. - */ -int i2o_device_claim_release(struct i2o_device *dev) -{ - int tries; - int rc = 0; - - mutex_lock(&dev->lock); - - /* - * If the controller takes a nonblocking approach to - * releases we have to sleep/poll for a few times. - */ - for (tries = 0; tries < 10; tries++) { - rc = i2o_device_issue_claim(dev, I2O_CMD_UTIL_RELEASE, - I2O_CLAIM_PRIMARY); - if (!rc) - break; - - ssleep(1); - } - - if (!rc) - pr_debug("i2o: claim release of device %d succeeded\n", - dev->lct_data.tid); - else - pr_debug("i2o: claim release of device %d failed %d\n", - dev->lct_data.tid, rc); - - mutex_unlock(&dev->lock); - - return rc; -} - -/** - * i2o_device_release - release the memory for a I2O device - * @dev: I2O device which should be released - * - * Release the allocated memory. This function is called if refcount of - * device reaches 0 automatically. - */ -static void i2o_device_release(struct device *dev) -{ - struct i2o_device *i2o_dev = to_i2o_device(dev); - - pr_debug("i2o: device %s released\n", dev_name(dev)); - - kfree(i2o_dev); -} - -/** - * class_id_show - Displays class id of I2O device - * @dev: device of which the class id should be displayed - * @attr: pointer to device attribute - * @buf: buffer into which the class id should be printed - * - * Returns the number of bytes which are printed into the buffer. - */ -static ssize_t class_id_show(struct device *dev, struct device_attribute *attr, - char *buf) -{ - struct i2o_device *i2o_dev = to_i2o_device(dev); - - sprintf(buf, "0x%03x\n", i2o_dev->lct_data.class_id); - return strlen(buf) + 1; -} -static DEVICE_ATTR_RO(class_id); - -/** - * tid_show - Displays TID of I2O device - * @dev: device of which the TID should be displayed - * @attr: pointer to device attribute - * @buf: buffer into which the TID should be printed - * - * Returns the number of bytes which are printed into the buffer. - */ -static ssize_t tid_show(struct device *dev, struct device_attribute *attr, - char *buf) -{ - struct i2o_device *i2o_dev = to_i2o_device(dev); - - sprintf(buf, "0x%03x\n", i2o_dev->lct_data.tid); - return strlen(buf) + 1; -} -static DEVICE_ATTR_RO(tid); - -/* I2O device attributes */ -static struct attribute *i2o_device_attrs[] = { - &dev_attr_class_id.attr, - &dev_attr_tid.attr, - NULL, -}; - -static const struct attribute_group i2o_device_group = { - .attrs = i2o_device_attrs, -}; - -const struct attribute_group *i2o_device_groups[] = { - &i2o_device_group, - NULL, -}; - -/** - * i2o_device_alloc - Allocate a I2O device and initialize it - * - * Allocate the memory for a I2O device and initialize locks and lists - * - * Returns the allocated I2O device or a negative error code if the device - * could not be allocated. - */ -static struct i2o_device *i2o_device_alloc(void) -{ - struct i2o_device *dev; - - dev = kzalloc(sizeof(*dev), GFP_KERNEL); - if (!dev) - return ERR_PTR(-ENOMEM); - - INIT_LIST_HEAD(&dev->list); - mutex_init(&dev->lock); - - dev->device.bus = &i2o_bus_type; - dev->device.release = &i2o_device_release; - - return dev; -} - -/** - * i2o_device_add - allocate a new I2O device and add it to the IOP - * @c: I2O controller that the device is on - * @entry: LCT entry of the I2O device - * - * Allocate a new I2O device and initialize it with the LCT entry. The - * device is appended to the device list of the controller. - * - * Returns zero on success, or a -ve errno. - */ -static int i2o_device_add(struct i2o_controller *c, i2o_lct_entry *entry) -{ - struct i2o_device *i2o_dev, *tmp; - int rc; - - i2o_dev = i2o_device_alloc(); - if (IS_ERR(i2o_dev)) { - printk(KERN_ERR "i2o: unable to allocate i2o device\n"); - return PTR_ERR(i2o_dev); - } - - i2o_dev->lct_data = *entry; - - dev_set_name(&i2o_dev->device, "%d:%03x", c->unit, - i2o_dev->lct_data.tid); - - i2o_dev->iop = c; - i2o_dev->device.parent = &c->device; - - rc = device_register(&i2o_dev->device); - if (rc) - goto err; - - list_add_tail(&i2o_dev->list, &c->devices); - - /* create user entries for this device */ - tmp = i2o_iop_find_device(i2o_dev->iop, i2o_dev->lct_data.user_tid); - if (tmp && (tmp != i2o_dev)) { - rc = sysfs_create_link(&i2o_dev->device.kobj, - &tmp->device.kobj, "user"); - if (rc) - goto unreg_dev; - } - - /* create user entries referring to this device */ - list_for_each_entry(tmp, &c->devices, list) - if ((tmp->lct_data.user_tid == i2o_dev->lct_data.tid) - && (tmp != i2o_dev)) { - rc = sysfs_create_link(&tmp->device.kobj, - &i2o_dev->device.kobj, "user"); - if (rc) - goto rmlink1; - } - - /* create parent entries for this device */ - tmp = i2o_iop_find_device(i2o_dev->iop, i2o_dev->lct_data.parent_tid); - if (tmp && (tmp != i2o_dev)) { - rc = sysfs_create_link(&i2o_dev->device.kobj, - &tmp->device.kobj, "parent"); - if (rc) - goto rmlink1; - } - - /* create parent entries referring to this device */ - list_for_each_entry(tmp, &c->devices, list) - if ((tmp->lct_data.parent_tid == i2o_dev->lct_data.tid) - && (tmp != i2o_dev)) { - rc = sysfs_create_link(&tmp->device.kobj, - &i2o_dev->device.kobj, "parent"); - if (rc) - goto rmlink2; - } - - i2o_driver_notify_device_add_all(i2o_dev); - - pr_debug("i2o: device %s added\n", dev_name(&i2o_dev->device)); - - return 0; - -rmlink2: - /* If link creating failed halfway, we loop whole list to cleanup. - * And we don't care wrong removing of link, because sysfs_remove_link - * will take care of it. - */ - list_for_each_entry(tmp, &c->devices, list) { - if (tmp->lct_data.parent_tid == i2o_dev->lct_data.tid) - sysfs_remove_link(&tmp->device.kobj, "parent"); - } - sysfs_remove_link(&i2o_dev->device.kobj, "parent"); -rmlink1: - list_for_each_entry(tmp, &c->devices, list) - if (tmp->lct_data.user_tid == i2o_dev->lct_data.tid) - sysfs_remove_link(&tmp->device.kobj, "user"); - sysfs_remove_link(&i2o_dev->device.kobj, "user"); -unreg_dev: - list_del(&i2o_dev->list); - device_unregister(&i2o_dev->device); -err: - kfree(i2o_dev); - return rc; -} - -/** - * i2o_device_remove - remove an I2O device from the I2O core - * @i2o_dev: I2O device which should be released - * - * Is used on I2O controller removal or LCT modification, when the device - * is removed from the system. Note that the device could still hang - * around until the refcount reaches 0. - */ -void i2o_device_remove(struct i2o_device *i2o_dev) -{ - struct i2o_device *tmp; - struct i2o_controller *c = i2o_dev->iop; - - i2o_driver_notify_device_remove_all(i2o_dev); - - sysfs_remove_link(&i2o_dev->device.kobj, "parent"); - sysfs_remove_link(&i2o_dev->device.kobj, "user"); - - list_for_each_entry(tmp, &c->devices, list) { - if (tmp->lct_data.parent_tid == i2o_dev->lct_data.tid) - sysfs_remove_link(&tmp->device.kobj, "parent"); - if (tmp->lct_data.user_tid == i2o_dev->lct_data.tid) - sysfs_remove_link(&tmp->device.kobj, "user"); - } - list_del(&i2o_dev->list); - - device_unregister(&i2o_dev->device); -} - -/** - * i2o_device_parse_lct - Parse a previously fetched LCT and create devices - * @c: I2O controller from which the LCT should be parsed. - * - * The Logical Configuration Table tells us what we can talk to on the - * board. For every entry we create an I2O device, which is registered in - * the I2O core. - * - * Returns 0 on success or negative error code on failure. - */ -int i2o_device_parse_lct(struct i2o_controller *c) -{ - struct i2o_device *dev, *tmp; - i2o_lct *lct; - u32 *dlct = c->dlct.virt; - int max = 0, i = 0; - u16 table_size; - u32 buf; - - mutex_lock(&c->lct_lock); - - kfree(c->lct); - - buf = le32_to_cpu(*dlct++); - table_size = buf & 0xffff; - - lct = c->lct = kmalloc(table_size * 4, GFP_KERNEL); - if (!lct) { - mutex_unlock(&c->lct_lock); - return -ENOMEM; - } - - lct->lct_ver = buf >> 28; - lct->boot_tid = buf >> 16 & 0xfff; - lct->table_size = table_size; - lct->change_ind = le32_to_cpu(*dlct++); - lct->iop_flags = le32_to_cpu(*dlct++); - - table_size -= 3; - - pr_debug("%s: LCT has %d entries (LCT size: %d)\n", c->name, max, - lct->table_size); - - while (table_size > 0) { - i2o_lct_entry *entry = &lct->lct_entry[max]; - int found = 0; - - buf = le32_to_cpu(*dlct++); - entry->entry_size = buf & 0xffff; - entry->tid = buf >> 16 & 0xfff; - - entry->change_ind = le32_to_cpu(*dlct++); - entry->device_flags = le32_to_cpu(*dlct++); - - buf = le32_to_cpu(*dlct++); - entry->class_id = buf & 0xfff; - entry->version = buf >> 12 & 0xf; - entry->vendor_id = buf >> 16; - - entry->sub_class = le32_to_cpu(*dlct++); - - buf = le32_to_cpu(*dlct++); - entry->user_tid = buf & 0xfff; - entry->parent_tid = buf >> 12 & 0xfff; - entry->bios_info = buf >> 24; - - memcpy(&entry->identity_tag, dlct, 8); - dlct += 2; - - entry->event_capabilities = le32_to_cpu(*dlct++); - - /* add new devices, which are new in the LCT */ - list_for_each_entry_safe(dev, tmp, &c->devices, list) { - if (entry->tid == dev->lct_data.tid) { - found = 1; - break; - } - } - - if (!found) - i2o_device_add(c, entry); - - table_size -= 9; - max++; - } - - /* remove devices, which are not in the LCT anymore */ - list_for_each_entry_safe(dev, tmp, &c->devices, list) { - int found = 0; - - for (i = 0; i < max; i++) { - if (lct->lct_entry[i].tid == dev->lct_data.tid) { - found = 1; - break; - } - } - - if (!found) - i2o_device_remove(dev); - } - - mutex_unlock(&c->lct_lock); - - return 0; -} - -/* - * Run time support routines - */ - -/* Issue UTIL_PARAMS_GET or UTIL_PARAMS_SET - * - * This function can be used for all UtilParamsGet/Set operations. - * The OperationList is given in oplist-buffer, - * and results are returned in reslist-buffer. - * Note that the minimum sized reslist is 8 bytes and contains - * ResultCount, ErrorInfoSize, BlockStatus and BlockSize. - */ -int i2o_parm_issue(struct i2o_device *i2o_dev, int cmd, void *oplist, - int oplen, void *reslist, int reslen) -{ - struct i2o_message *msg; - int i = 0; - int rc; - struct i2o_dma res; - struct i2o_controller *c = i2o_dev->iop; - struct device *dev = &c->pdev->dev; - - res.virt = NULL; - - if (i2o_dma_alloc(dev, &res, reslen)) - return -ENOMEM; - - msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET); - if (IS_ERR(msg)) { - i2o_dma_free(dev, &res); - return PTR_ERR(msg); - } - - i = 0; - msg->u.head[1] = - cpu_to_le32(cmd << 24 | HOST_TID << 12 | i2o_dev->lct_data.tid); - msg->body[i++] = cpu_to_le32(0x00000000); - msg->body[i++] = cpu_to_le32(0x4C000000 | oplen); /* OperationList */ - memcpy(&msg->body[i], oplist, oplen); - i += (oplen / 4 + (oplen % 4 ? 1 : 0)); - msg->body[i++] = cpu_to_le32(0xD0000000 | res.len); /* ResultList */ - msg->body[i++] = cpu_to_le32(res.phys); - - msg->u.head[0] = - cpu_to_le32(I2O_MESSAGE_SIZE(i + sizeof(struct i2o_message) / 4) | - SGL_OFFSET_5); - - rc = i2o_msg_post_wait_mem(c, msg, 10, &res); - - /* This only looks like a memory leak - don't "fix" it. */ - if (rc == -ETIMEDOUT) - return rc; - - memcpy(reslist, res.virt, res.len); - i2o_dma_free(dev, &res); - - return rc; -} - -/* - * Query one field group value or a whole scalar group. - */ -int i2o_parm_field_get(struct i2o_device *i2o_dev, int group, int field, - void *buf, int buflen) -{ - u32 opblk[] = { cpu_to_le32(0x00000001), - cpu_to_le32((u16) group << 16 | I2O_PARAMS_FIELD_GET), - cpu_to_le32((s16) field << 16 | 0x00000001) - }; - u8 *resblk; /* 8 bytes for header */ - int rc; - - resblk = kmalloc(buflen + 8, GFP_KERNEL); - if (!resblk) - return -ENOMEM; - - rc = i2o_parm_issue(i2o_dev, I2O_CMD_UTIL_PARAMS_GET, opblk, - sizeof(opblk), resblk, buflen + 8); - - memcpy(buf, resblk + 8, buflen); /* cut off header */ - - kfree(resblk); - - return rc; -} - -/* - * if oper == I2O_PARAMS_TABLE_GET, get from all rows - * if fieldcount == -1 return all fields - * ibuf and ibuflen are unused (use NULL, 0) - * else return specific fields - * ibuf contains fieldindexes - * - * if oper == I2O_PARAMS_LIST_GET, get from specific rows - * if fieldcount == -1 return all fields - * ibuf contains rowcount, keyvalues - * else return specific fields - * fieldcount is # of fieldindexes - * ibuf contains fieldindexes, rowcount, keyvalues - * - * You could also use directly function i2o_issue_params(). - */ -int i2o_parm_table_get(struct i2o_device *dev, int oper, int group, - int fieldcount, void *ibuf, int ibuflen, void *resblk, - int reslen) -{ - u16 *opblk; - int size; - - size = 10 + ibuflen; - if (size % 4) - size += 4 - size % 4; - - opblk = kmalloc(size, GFP_KERNEL); - if (opblk == NULL) - return -ENOMEM; - - opblk[0] = 1; /* operation count */ - opblk[1] = 0; /* pad */ - opblk[2] = oper; - opblk[3] = group; - opblk[4] = fieldcount; - memcpy(opblk + 5, ibuf, ibuflen); /* other params */ - - size = i2o_parm_issue(dev, I2O_CMD_UTIL_PARAMS_GET, opblk, - size, resblk, reslen); - - kfree(opblk); - if (size > reslen) - return reslen; - - return size; -} - -EXPORT_SYMBOL(i2o_device_claim); -EXPORT_SYMBOL(i2o_device_claim_release); -EXPORT_SYMBOL(i2o_parm_field_get); -EXPORT_SYMBOL(i2o_parm_table_get); -EXPORT_SYMBOL(i2o_parm_issue); |