Linux-2.6.12-rc2v2.6.12-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!

1 files changed, 634 insertions, 0 deletions

diff --git a/drivers/message/i2o/device.c b/drivers/message/i2o/device.c
new file mode 100644
index 000000000000..eb907e87bc7b
--- /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);