Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/message/i2o/device.c b/drivers/message/i2o/device.c
new file mode 100644
index 0000000..eb907e8
--- /dev/null
+++ b/drivers/message/i2o/device.c
@@ -0,0 +1,634 @@
+/*
+ * 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 <linux/i2o.h>
+#include <linux/delay.h>
+
+/* Exec OSM functions */
+extern struct bus_type i2o_bus_type;
+
+/**
+ * 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 __iomem *msg;
+ u32 m;
+
+ m = i2o_msg_get_wait(dev->iop, &msg, I2O_TIMEOUT_MESSAGE_GET);
+ if (m == I2O_QUEUE_EMPTY)
+ return -ETIMEDOUT;
+
+ writel(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
+ writel(cmd << 24 | HOST_TID << 12 | dev->lct_data.tid, &msg->u.head[1]);
+ writel(type, &msg->body[0]);
+
+ return i2o_msg_post_wait(dev->iop, m, 60);
+};
+
+/**
+ * i2o_device_claim - claim a device for use by an OSM
+ * @dev: I2O device to claim
+ * @drv: I2O driver which wants to claim the device
+ *
+ * Do the leg work to assign a device to a given OSM. If the claim succeed
+ * the owner of the rimary. 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;
+
+ down(&dev->lock);
+
+ rc = i2o_device_issue_claim(dev, I2O_CMD_UTIL_CLAIM, I2O_CLAIM_PRIMARY);
+ if (!rc)
+ pr_debug("i2o: claim of device %d succeded\n",
+ dev->lct_data.tid);
+ else
+ pr_debug("i2o: claim of device %d failed %d\n",
+ dev->lct_data.tid, rc);
+
+ up(&dev->lock);
+
+ return rc;
+};
+
+/**
+ * i2o_device_claim_release - release a device that the OSM is using
+ * @dev: device to release
+ * @drv: driver which claimed the device
+ *
+ * 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;
+
+ down(&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 succeded\n",
+ dev->lct_data.tid);
+ else
+ pr_debug("i2o: claim release of device %d failed %d\n",
+ dev->lct_data.tid, rc);
+
+ up(&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->bus_id);
+
+ kfree(i2o_dev);
+};
+
+/**
+ * i2o_device_class_release - Remove I2O device attributes
+ * @cd: I2O class device which is added to the I2O device class
+ *
+ * Removes attributes from the I2O device again. Also search each device
+ * on the controller for I2O devices which refert to this device as parent
+ * or user and remove this links also.
+ */
+static void i2o_device_class_release(struct class_device *cd)
+{
+ struct i2o_device *i2o_dev, *tmp;
+ struct i2o_controller *c;
+
+ i2o_dev = to_i2o_device(cd->dev);
+ c = i2o_dev->iop;
+
+ 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");
+ }
+};
+
+/* I2O device class */
+static struct class i2o_device_class = {
+ .name = "i2o_device",
+ .release = i2o_device_class_release
+};
+
+/**
+ * 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 = kmalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return ERR_PTR(-ENOMEM);
+
+ memset(dev, 0, sizeof(*dev));
+
+ INIT_LIST_HEAD(&dev->list);
+ init_MUTEX(&dev->lock);
+
+ dev->device.bus = &i2o_bus_type;
+ dev->device.release = &i2o_device_release;
+ dev->classdev.class = &i2o_device_class;
+ dev->classdev.dev = &dev->device;
+
+ return dev;
+};
+
+/**
+ * i2o_device_add - allocate a new I2O device and add it to the IOP
+ * @iop: I2O controller where 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 a pointer to the I2O device on success or negative error code
+ * on failure.
+ */
+static struct i2o_device *i2o_device_add(struct i2o_controller *c,
+ i2o_lct_entry * entry)
+{
+ struct i2o_device *dev;
+
+ dev = i2o_device_alloc();
+ if (IS_ERR(dev)) {
+ printk(KERN_ERR "i2o: unable to allocate i2o device\n");
+ return dev;
+ }
+
+ dev->lct_data = *entry;
+
+ snprintf(dev->device.bus_id, BUS_ID_SIZE, "%d:%03x", c->unit,
+ dev->lct_data.tid);
+
+ snprintf(dev->classdev.class_id, BUS_ID_SIZE, "%d:%03x", c->unit,
+ dev->lct_data.tid);
+
+ dev->iop = c;
+ dev->device.parent = &c->device;
+
+ device_register(&dev->device);
+
+ list_add_tail(&dev->list, &c->devices);
+
+ class_device_register(&dev->classdev);
+
+ i2o_driver_notify_device_add_all(dev);
+
+ pr_debug("i2o: device %s added\n", dev->device.bus_id);
+
+ return dev;
+};
+
+/**
+ * i2o_device_remove - remove an I2O device from the I2O core
+ * @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)
+{
+ i2o_driver_notify_device_remove_all(i2o_dev);
+ class_device_unregister(&i2o_dev->classdev);
+ 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;
+ int i;
+ int max;
+
+ down(&c->lct_lock);
+
+ if (c->lct)
+ kfree(c->lct);
+
+ lct = c->dlct.virt;
+
+ c->lct = kmalloc(lct->table_size * 4, GFP_KERNEL);
+ if (!c->lct) {
+ up(&c->lct_lock);
+ return -ENOMEM;
+ }
+
+ if (lct->table_size * 4 > c->dlct.len) {
+ memcpy_fromio(c->lct, c->dlct.virt, c->dlct.len);
+ up(&c->lct_lock);
+ return -EAGAIN;
+ }
+
+ memcpy_fromio(c->lct, c->dlct.virt, lct->table_size * 4);
+
+ lct = c->lct;
+
+ max = (lct->table_size - 3) / 9;
+
+ pr_debug("%s: LCT has %d entries (LCT size: %d)\n", c->name, max,
+ lct->table_size);
+
+ /* 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);
+ }
+
+ /* add new devices, which are new in the LCT */
+ for (i = 0; i < max; i++) {
+ int found = 0;
+
+ list_for_each_entry_safe(dev, tmp, &c->devices, list) {
+ if (lct->lct_entry[i].tid == dev->lct_data.tid) {
+ found = 1;
+ break;
+ }
+ }
+
+ if (!found)
+ i2o_device_add(c, &lct->lct_entry[i]);
+ }
+ up(&c->lct_lock);
+
+ return 0;
+};
+
+/**
+ * i2o_device_class_show_class_id - Displays class id of I2O device
+ * @cd: class device of which the class id should be displayed
+ * @buf: buffer into which the class id should be printed
+ *
+ * Returns the number of bytes which are printed into the buffer.
+ */
+static ssize_t i2o_device_class_show_class_id(struct class_device *cd,
+ char *buf)
+{
+ struct i2o_device *dev = to_i2o_device(cd->dev);
+
+ sprintf(buf, "%03x\n", dev->lct_data.class_id);
+ return strlen(buf) + 1;
+};
+
+/**
+ * i2o_device_class_show_tid - Displays TID of I2O device
+ * @cd: class device of which the TID should be displayed
+ * @buf: buffer into which the class id should be printed
+ *
+ * Returns the number of bytes which are printed into the buffer.
+ */
+static ssize_t i2o_device_class_show_tid(struct class_device *cd, char *buf)
+{
+ struct i2o_device *dev = to_i2o_device(cd->dev);
+
+ sprintf(buf, "%03x\n", dev->lct_data.tid);
+ return strlen(buf) + 1;
+};
+
+/* I2O device class attributes */
+static CLASS_DEVICE_ATTR(class_id, S_IRUGO, i2o_device_class_show_class_id,
+ NULL);
+static CLASS_DEVICE_ATTR(tid, S_IRUGO, i2o_device_class_show_tid, NULL);
+
+/**
+ * i2o_device_class_add - Adds attributes to the I2O device
+ * @cd: I2O class device which is added to the I2O device class
+ *
+ * This function get called when a I2O device is added to the class. It
+ * creates the attributes for each device and creates user/parent symlink
+ * if necessary.
+ *
+ * Returns 0 on success or negative error code on failure.
+ */
+static int i2o_device_class_add(struct class_device *cd)
+{
+ struct i2o_device *i2o_dev, *tmp;
+ struct i2o_controller *c;
+
+ i2o_dev = to_i2o_device(cd->dev);
+ c = i2o_dev->iop;
+
+ class_device_create_file(cd, &class_device_attr_class_id);
+ class_device_create_file(cd, &class_device_attr_tid);
+
+ /* create user entries for this device */
+ tmp = i2o_iop_find_device(i2o_dev->iop, i2o_dev->lct_data.user_tid);
+ if (tmp)
+ sysfs_create_link(&i2o_dev->device.kobj, &tmp->device.kobj,
+ "user");
+
+ /* create user entries refering to this device */
+ list_for_each_entry(tmp, &c->devices, list)
+ if (tmp->lct_data.user_tid == i2o_dev->lct_data.tid)
+ sysfs_create_link(&tmp->device.kobj,
+ &i2o_dev->device.kobj, "user");
+
+ /* create parent entries for this device */
+ tmp = i2o_iop_find_device(i2o_dev->iop, i2o_dev->lct_data.parent_tid);
+ if (tmp)
+ sysfs_create_link(&i2o_dev->device.kobj, &tmp->device.kobj,
+ "parent");
+
+ /* create parent entries refering to this device */
+ list_for_each_entry(tmp, &c->devices, list)
+ if (tmp->lct_data.parent_tid == i2o_dev->lct_data.tid)
+ sysfs_create_link(&tmp->device.kobj,
+ &i2o_dev->device.kobj, "parent");
+
+ return 0;
+};
+
+/* I2O device class interface */
+static struct class_interface i2o_device_class_interface = {
+ .class = &i2o_device_class,
+ .add = i2o_device_class_add
+};
+
+/*
+ * 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 __iomem *msg;
+ u32 m;
+ u32 *res32 = (u32 *) reslist;
+ u32 *restmp = (u32 *) reslist;
+ int len = 0;
+ 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, GFP_KERNEL))
+ return -ENOMEM;
+
+ m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
+ if (m == I2O_QUEUE_EMPTY) {
+ i2o_dma_free(dev, &res);
+ return -ETIMEDOUT;
+ }
+
+ i = 0;
+ writel(cmd << 24 | HOST_TID << 12 | i2o_dev->lct_data.tid,
+ &msg->u.head[1]);
+ writel(0, &msg->body[i++]);
+ writel(0x4C000000 | oplen, &msg->body[i++]); /* OperationList */
+ memcpy_toio(&msg->body[i], oplist, oplen);
+ i += (oplen / 4 + (oplen % 4 ? 1 : 0));
+ writel(0xD0000000 | res.len, &msg->body[i++]); /* ResultList */
+ writel(res.phys, &msg->body[i++]);
+
+ writel(I2O_MESSAGE_SIZE(i + sizeof(struct i2o_message) / 4) |
+ SGL_OFFSET_5, &msg->u.head[0]);
+
+ rc = i2o_msg_post_wait_mem(c, m, 10, &res);
+
+ /* This only looks like a memory leak - don't "fix" it. */
+ if (rc == -ETIMEDOUT)
+ return rc;
+
+ memcpy_fromio(reslist, res.virt, res.len);
+ i2o_dma_free(dev, &res);
+
+ /* Query failed */
+ if (rc)
+ return rc;
+ /*
+ * Calculate number of bytes of Result LIST
+ * We need to loop through each Result BLOCK and grab the length
+ */
+ restmp = res32 + 1;
+ len = 1;
+ for (i = 0; i < (res32[0] & 0X0000FFFF); i++) {
+ if (restmp[0] & 0x00FF0000) { /* BlockStatus != SUCCESS */
+ printk(KERN_WARNING
+ "%s - Error:\n ErrorInfoSize = 0x%02x, "
+ "BlockStatus = 0x%02x, BlockSize = 0x%04x\n",
+ (cmd ==
+ I2O_CMD_UTIL_PARAMS_SET) ? "PARAMS_SET" :
+ "PARAMS_GET", res32[1] >> 24,
+ (res32[1] >> 16) & 0xFF, res32[1] & 0xFFFF);
+
+ /*
+ * If this is the only request,than we return an error
+ */
+ if ((res32[0] & 0x0000FFFF) == 1) {
+ return -((res32[1] >> 16) & 0xFF); /* -BlockStatus */
+ }
+ }
+ len += restmp[0] & 0x0000FFFF; /* Length of res BLOCK */
+ restmp += restmp[0] & 0x0000FFFF; /* Skip to next BLOCK */
+ }
+ return (len << 2); /* bytes used by result list */
+}
+
+/*
+ * 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)
+{
+ u16 opblk[] = { 1, 0, I2O_PARAMS_FIELD_GET, group, 1, field };
+ u8 resblk[8 + buflen]; /* 8 bytes for header */
+ int size;
+
+ if (field == -1) /* whole group */
+ opblk[4] = -1;
+
+ size = i2o_parm_issue(i2o_dev, I2O_CMD_UTIL_PARAMS_GET, opblk,
+ sizeof(opblk), resblk, sizeof(resblk));
+
+ memcpy(buf, resblk + 8, buflen); /* cut off header */
+
+ if (size > buflen)
+ return buflen;
+
+ return size;
+}
+
+/*
+ * 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) {
+ printk(KERN_ERR "i2o: no memory for query buffer.\n");
+ 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;
+}
+
+/**
+ * i2o_device_init - Initialize I2O devices
+ *
+ * Registers the I2O device class.
+ *
+ * Returns 0 on success or negative error code on failure.
+ */
+int i2o_device_init(void)
+{
+ int rc;
+
+ rc = class_register(&i2o_device_class);
+ if (rc)
+ return rc;
+
+ return class_interface_register(&i2o_device_class_interface);
+};
+
+/**
+ * i2o_device_exit - I2O devices exit function
+ *
+ * Unregisters the I2O device class.
+ */
+void i2o_device_exit(void)
+{
+ class_interface_register(&i2o_device_class_interface);
+ class_unregister(&i2o_device_class);
+};
+
+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);