linux/drivers/message/i2o/config-osm.c
Markus Lidel f10378fff6 [PATCH] I2O: new sysfs attributes and Adaptec specific block device access and 64-bit DMA support
Changes:
 - Added Bus-OSM which could be used by user space programs to reset a
   channel on the controller
 - Make ioctl's in Config-OSM obsolete in prefer for sysfs attributes and
   move those to its own file
 - Added sysfs attribute for firmware read and write access for I2O
   controllers
 - Added special handling of firmware read and write access for Adaptec
   controllers
 - Added vendor id and product id as sysfs-attribute to Executive classes
 - Added automatic notification of LCT change handling to Exec-OSM
 - Added flushing function to Block-OSM for later barrier implementation
 - Use PRIVATE messages for Block access on Adaptec controllers, which are
   faster then BLOCK class access
 - Cleaned up support for Promise controller
 - New messages are now detected using the IRQ status register as
   suggested by the I2O spec
 - Added i2o_dma_high() and i2o_dma_low() functions
 - Added facility for SG tablesize calculation when using 32-bit and
   64-bit DMA addresses
 - Added i2o_dma_map_single() and i2o_dma_map_sg() which could build the
   SG list for 32-bit as well as 64-bit DMA addresses

Signed-off-by: Markus Lidel <Markus.Lidel@shadowconnect.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-24 00:05:28 -07:00

579 lines
14 KiB
C

/*
* Configuration OSM
*
* Copyright (C) 2005 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/namei.h>
#include <asm/uaccess.h>
#define OSM_NAME "config-osm"
#define OSM_VERSION "1.248"
#define OSM_DESCRIPTION "I2O Configuration OSM"
/* access mode user rw */
#define S_IWRSR (S_IRUSR | S_IWUSR)
static struct i2o_driver i2o_config_driver;
/* Special file operations for sysfs */
struct fops_attribute {
struct bin_attribute bin;
struct file_operations fops;
};
/**
* sysfs_read_dummy
*/
static ssize_t sysfs_read_dummy(struct kobject *kobj, char *buf, loff_t offset,
size_t count)
{
return 0;
};
/**
* sysfs_write_dummy
*/
static ssize_t sysfs_write_dummy(struct kobject *kobj, char *buf, loff_t offset,
size_t count)
{
return 0;
};
/**
* sysfs_create_fops_file - Creates attribute with special file operations
* @kobj: kobject which should contains the attribute
* @attr: attributes which should be used to create file
*
* First creates attribute @attr in kobject @kobj. If it is the first time
* this function is called, merge old fops from sysfs with new one and
* write it back. Afterwords the new fops will be set for the created
* attribute.
*
* Returns 0 on success or negative error code on failure.
*/
static int sysfs_create_fops_file(struct kobject *kobj,
struct fops_attribute *attr)
{
struct file_operations tmp, *fops;
struct dentry *d;
struct qstr qstr;
int rc;
fops = &attr->fops;
if (fops->read)
attr->bin.read = sysfs_read_dummy;
if (fops->write)
attr->bin.write = sysfs_write_dummy;
if ((rc = sysfs_create_bin_file(kobj, &attr->bin)))
return rc;
qstr.name = attr->bin.attr.name;
qstr.len = strlen(qstr.name);
qstr.hash = full_name_hash(qstr.name, qstr.len);
if ((d = lookup_hash(&qstr, kobj->dentry))) {
if (!fops->owner) {
memcpy(&tmp, d->d_inode->i_fop, sizeof(tmp));
if (fops->read)
tmp.read = fops->read;
if (fops->write)
tmp.write = fops->write;
memcpy(fops, &tmp, sizeof(tmp));
}
d->d_inode->i_fop = fops;
} else
sysfs_remove_bin_file(kobj, &attr->bin);
return -ENOENT;
};
/**
* sysfs_remove_fops_file - Remove attribute with special file operations
* @kobj: kobject which contains the attribute
* @attr: attributes which are used to create file
*
* Only wrapper arround sysfs_remove_bin_file()
*
* Returns 0 on success or negative error code on failure.
*/
static inline int sysfs_remove_fops_file(struct kobject *kobj,
struct fops_attribute *attr)
{
return sysfs_remove_bin_file(kobj, &attr->bin);
};
/**
* i2o_config_read_hrt - Returns the HRT of the controller
* @kob: kernel object handle
* @buf: buffer into which the HRT should be copied
* @off: file offset
* @count: number of bytes to read
*
* Put @count bytes starting at @off into @buf from the HRT of the I2O
* controller corresponding to @kobj.
*
* Returns number of bytes copied into buffer.
*/
static ssize_t i2o_config_read_hrt(struct kobject *kobj, char *buf,
loff_t offset, size_t count)
{
struct i2o_controller *c = kobj_to_i2o_device(kobj)->iop;
i2o_hrt *hrt = c->hrt.virt;
u32 size = (hrt->num_entries * hrt->entry_len + 2) * 4;
if (offset > size)
return 0;
if (offset + count > size)
count = size - offset;
memcpy(buf, (u8 *) hrt + offset, count);
return count;
};
/**
* i2o_config_read_lct - Returns the LCT of the controller
* @kob: kernel object handle
* @buf: buffer into which the LCT should be copied
* @off: file offset
* @count: number of bytes to read
*
* Put @count bytes starting at @off into @buf from the LCT of the I2O
* controller corresponding to @kobj.
*
* Returns number of bytes copied into buffer.
*/
static ssize_t i2o_config_read_lct(struct kobject *kobj, char *buf,
loff_t offset, size_t count)
{
struct i2o_controller *c = kobj_to_i2o_device(kobj)->iop;
u32 size = c->lct->table_size * 4;
if (offset > size)
return 0;
if (offset + count > size)
count = size - offset;
memcpy(buf, (u8 *) c->lct + offset, count);
return count;
};
#define I2O_CONFIG_SW_ATTR(_name,_mode,_type,_swid) \
static ssize_t i2o_config_##_name##_read(struct file *file, char __user *buf, size_t count, loff_t * offset) { \
return i2o_config_sw_read(file, buf, count, offset, _type, _swid); \
};\
\
static ssize_t i2o_config_##_name##_write(struct file *file, const char __user *buf, size_t count, loff_t * offset) { \
return i2o_config_sw_write(file, buf, count, offset, _type, _swid); \
}; \
\
static struct fops_attribute i2o_config_attr_##_name = { \
.bin = { .attr = { .name = __stringify(_name), .mode = _mode, \
.owner = THIS_MODULE }, \
.size = 0, }, \
.fops = { .write = i2o_config_##_name##_write, \
.read = i2o_config_##_name##_read} \
};
#ifdef CONFIG_I2O_EXT_ADAPTEC
/**
* i2o_config_dpt_reagion - Converts type and id to flash region
* @swtype: type of software module reading
* @swid: id of software which should be read
*
* Converts type and id from I2O spec to the matching region for DPT /
* Adaptec controllers.
*
* Returns region which match type and id or -1 on error.
*/
static u32 i2o_config_dpt_region(u8 swtype, u8 swid)
{
switch (swtype) {
case I2O_SOFTWARE_MODULE_IRTOS:
/*
* content: operation firmware
* region size:
* 0xbc000 for 2554, 3754, 2564, 3757
* 0x170000 for 2865
* 0x17c000 for 3966
*/
if (!swid)
return 0;
break;
case I2O_SOFTWARE_MODULE_IOP_PRIVATE:
/*
* content: BIOS and SMOR
* BIOS size: first 0x8000 bytes
* region size:
* 0x40000 for 2554, 3754, 2564, 3757
* 0x80000 for 2865, 3966
*/
if (!swid)
return 1;
break;
case I2O_SOFTWARE_MODULE_IOP_CONFIG:
switch (swid) {
case 0:
/*
* content: NVRAM defaults
* region size: 0x2000 bytes
*/
return 2;
case 1:
/*
* content: serial number
* region size: 0x2000 bytes
*/
return 3;
}
break;
}
return -1;
};
#endif
/**
* i2o_config_sw_read - Read a software module from controller
* @file: file pointer
* @buf: buffer into which the data should be copied
* @count: number of bytes to read
* @off: file offset
* @swtype: type of software module reading
* @swid: id of software which should be read
*
* Transfers @count bytes at offset @offset from IOP into buffer using
* type @swtype and id @swid as described in I2O spec.
*
* Returns number of bytes copied into buffer or error code on failure.
*/
static ssize_t i2o_config_sw_read(struct file *file, char __user * buf,
size_t count, loff_t * offset, u8 swtype,
u32 swid)
{
struct sysfs_dirent *sd = file->f_dentry->d_parent->d_fsdata;
struct kobject *kobj = sd->s_element;
struct i2o_controller *c = kobj_to_i2o_device(kobj)->iop;
u32 m, function = I2O_CMD_SW_UPLOAD;
struct i2o_dma buffer;
struct i2o_message __iomem *msg;
u32 __iomem *mptr;
int rc, status;
m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
if (m == I2O_QUEUE_EMPTY)
return -EBUSY;
mptr = &msg->body[3];
if ((rc = i2o_dma_alloc(&c->pdev->dev, &buffer, count, GFP_KERNEL))) {
i2o_msg_nop(c, m);
return rc;
}
#ifdef CONFIG_I2O_EXT_ADAPTEC
if (c->adaptec) {
mptr = &msg->body[4];
function = I2O_CMD_PRIVATE;
writel(TEN_WORD_MSG_SIZE | SGL_OFFSET_8, &msg->u.head[0]);
writel(I2O_VENDOR_DPT << 16 | I2O_DPT_FLASH_READ,
&msg->body[0]);
writel(i2o_config_dpt_region(swtype, swid), &msg->body[1]);
writel(*offset, &msg->body[2]);
writel(count, &msg->body[3]);
} else
#endif
writel(NINE_WORD_MSG_SIZE | SGL_OFFSET_7, &msg->u.head[0]);
writel(0xD0000000 | count, mptr++);
writel(buffer.phys, mptr);
writel(function << 24 | HOST_TID << 12 | ADAPTER_TID, &msg->u.head[1]);
writel(i2o_config_driver.context, &msg->u.head[2]);
writel(0, &msg->u.head[3]);
#ifdef CONFIG_I2O_EXT_ADAPTEC
if (!c->adaptec)
#endif
{
writel((u32) swtype << 16 | (u32) 1 << 8, &msg->body[0]);
writel(0, &msg->body[1]);
writel(swid, &msg->body[2]);
}
status = i2o_msg_post_wait_mem(c, m, 60, &buffer);
if (status == I2O_POST_WAIT_OK) {
if (!(rc = copy_to_user(buf, buffer.virt, count))) {
rc = count;
*offset += count;
}
} else
rc = -EIO;
if (status != -ETIMEDOUT)
i2o_dma_free(&c->pdev->dev, &buffer);
return rc;
};
/**
* i2o_config_sw_write - Write a software module to controller
* @file: file pointer
* @buf: buffer into which the data should be copied
* @count: number of bytes to read
* @off: file offset
* @swtype: type of software module writing
* @swid: id of software which should be written
*
* Transfers @count bytes at offset @offset from buffer to IOP using
* type @swtype and id @swid as described in I2O spec.
*
* Returns number of bytes copied from buffer or error code on failure.
*/
static ssize_t i2o_config_sw_write(struct file *file, const char __user * buf,
size_t count, loff_t * offset, u8 swtype,
u32 swid)
{
struct sysfs_dirent *sd = file->f_dentry->d_parent->d_fsdata;
struct kobject *kobj = sd->s_element;
struct i2o_controller *c = kobj_to_i2o_device(kobj)->iop;
u32 m, function = I2O_CMD_SW_DOWNLOAD;
struct i2o_dma buffer;
struct i2o_message __iomem *msg;
u32 __iomem *mptr;
int rc, status;
m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
if (m == I2O_QUEUE_EMPTY)
return -EBUSY;
mptr = &msg->body[3];
if ((rc = i2o_dma_alloc(&c->pdev->dev, &buffer, count, GFP_KERNEL)))
goto nop_msg;
if ((rc = copy_from_user(buffer.virt, buf, count)))
goto free_buffer;
#ifdef CONFIG_I2O_EXT_ADAPTEC
if (c->adaptec) {
mptr = &msg->body[4];
function = I2O_CMD_PRIVATE;
writel(TEN_WORD_MSG_SIZE | SGL_OFFSET_8, &msg->u.head[0]);
writel(I2O_VENDOR_DPT << 16 | I2O_DPT_FLASH_WRITE,
&msg->body[0]);
writel(i2o_config_dpt_region(swtype, swid), &msg->body[1]);
writel(*offset, &msg->body[2]);
writel(count, &msg->body[3]);
} else
#endif
writel(NINE_WORD_MSG_SIZE | SGL_OFFSET_7, &msg->u.head[0]);
writel(0xD4000000 | count, mptr++);
writel(buffer.phys, mptr);
writel(function << 24 | HOST_TID << 12 | ADAPTER_TID, &msg->u.head[1]);
writel(i2o_config_driver.context, &msg->u.head[2]);
writel(0, &msg->u.head[3]);
#ifdef CONFIG_I2O_EXT_ADAPTEC
if (!c->adaptec)
#endif
{
writel((u32) swtype << 16 | (u32) 1 << 8, &msg->body[0]);
writel(0, &msg->body[1]);
writel(swid, &msg->body[2]);
}
status = i2o_msg_post_wait_mem(c, m, 60, &buffer);
if (status != -ETIMEDOUT)
i2o_dma_free(&c->pdev->dev, &buffer);
if (status != I2O_POST_WAIT_OK)
return -EIO;
*offset += count;
return count;
free_buffer:
i2o_dma_free(&c->pdev->dev, &buffer);
nop_msg:
i2o_msg_nop(c, m);
return rc;
};
/* attribute for HRT in sysfs */
static struct bin_attribute i2o_config_hrt_attr = {
.attr = {
.name = "hrt",
.mode = S_IRUGO,
.owner = THIS_MODULE},
.size = 0,
.read = i2o_config_read_hrt
};
/* attribute for LCT in sysfs */
static struct bin_attribute i2o_config_lct_attr = {
.attr = {
.name = "lct",
.mode = S_IRUGO,
.owner = THIS_MODULE},
.size = 0,
.read = i2o_config_read_lct
};
/* IRTOS firmware access */
I2O_CONFIG_SW_ATTR(irtos, S_IWRSR, I2O_SOFTWARE_MODULE_IRTOS, 0);
#ifdef CONFIG_I2O_EXT_ADAPTEC
/*
* attribute for BIOS / SMOR, nvram and serial number access on DPT / Adaptec
* controllers
*/
I2O_CONFIG_SW_ATTR(bios, S_IWRSR, I2O_SOFTWARE_MODULE_IOP_PRIVATE, 0);
I2O_CONFIG_SW_ATTR(nvram, S_IWRSR, I2O_SOFTWARE_MODULE_IOP_CONFIG, 0);
I2O_CONFIG_SW_ATTR(serial, S_IWRSR, I2O_SOFTWARE_MODULE_IOP_CONFIG, 1);
#endif
/**
* i2o_config_notify_controller_add - Notify of added controller
* @c: the controller which was added
*
* If a I2O controller is added, we catch the notification to add sysfs
* entries.
*/
static void i2o_config_notify_controller_add(struct i2o_controller *c)
{
struct kobject *kobj = &c->exec->device.kobj;
sysfs_create_bin_file(kobj, &i2o_config_hrt_attr);
sysfs_create_bin_file(kobj, &i2o_config_lct_attr);
sysfs_create_fops_file(kobj, &i2o_config_attr_irtos);
#ifdef CONFIG_I2O_EXT_ADAPTEC
if (c->adaptec) {
sysfs_create_fops_file(kobj, &i2o_config_attr_bios);
sysfs_create_fops_file(kobj, &i2o_config_attr_nvram);
sysfs_create_fops_file(kobj, &i2o_config_attr_serial);
}
#endif
};
/**
* i2o_config_notify_controller_remove - Notify of removed controller
* @c: the controller which was removed
*
* If a I2O controller is removed, we catch the notification to remove the
* sysfs entries.
*/
static void i2o_config_notify_controller_remove(struct i2o_controller *c)
{
struct kobject *kobj = &c->exec->device.kobj;
#ifdef CONFIG_I2O_EXT_ADAPTEC
if (c->adaptec) {
sysfs_remove_fops_file(kobj, &i2o_config_attr_serial);
sysfs_remove_fops_file(kobj, &i2o_config_attr_nvram);
sysfs_remove_fops_file(kobj, &i2o_config_attr_bios);
}
#endif
sysfs_remove_fops_file(kobj, &i2o_config_attr_irtos);
sysfs_remove_bin_file(kobj, &i2o_config_lct_attr);
sysfs_remove_bin_file(kobj, &i2o_config_hrt_attr);
};
/* Config OSM driver struct */
static struct i2o_driver i2o_config_driver = {
.name = OSM_NAME,
.notify_controller_add = i2o_config_notify_controller_add,
.notify_controller_remove = i2o_config_notify_controller_remove
};
#ifdef CONFIG_I2O_CONFIG_OLD_IOCTL
#include "i2o_config.c"
#endif
/**
* i2o_config_init - Configuration OSM initialization function
*
* Registers Configuration OSM in the I2O core and if old ioctl's are
* compiled in initialize them.
*
* Returns 0 on success or negative error code on failure.
*/
static int __init i2o_config_init(void)
{
printk(KERN_INFO OSM_DESCRIPTION " v" OSM_VERSION "\n");
if (i2o_driver_register(&i2o_config_driver)) {
osm_err("handler register failed.\n");
return -EBUSY;
}
#ifdef CONFIG_I2O_CONFIG_OLD_IOCTL
if (i2o_config_old_init())
i2o_driver_unregister(&i2o_config_driver);
#endif
return 0;
}
/**
* i2o_config_exit - Configuration OSM exit function
*
* If old ioctl's are compiled in exit remove them and unregisters
* Configuration OSM from I2O core.
*/
static void i2o_config_exit(void)
{
#ifdef CONFIG_I2O_CONFIG_OLD_IOCTL
i2o_config_old_exit();
#endif
i2o_driver_unregister(&i2o_config_driver);
}
MODULE_AUTHOR("Markus Lidel <Markus.Lidel@shadowconnect.com>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION(OSM_DESCRIPTION);
MODULE_VERSION(OSM_VERSION);
module_init(i2o_config_init);
module_exit(i2o_config_exit);