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[PATCH] I2O: changed I2O API to create I2O messages in kernel memory

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Changed the I2O API to create I2O messages first in kernel memory and then
transfer it at once over the PCI bus instead of sending each quad-word over
the PCI bus.

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>
This commit is contained in:
Markus Lidel
2006-01-06 00:19:29 -08:00
committed by Linus Torvalds
parent 347a8dc3b8
commit a1a5ea70a6
9 changed files with 1276 additions and 1161 deletions
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51
drivers/message/i2o/device.c
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@@ -35,18 +35,18 @@
static inline int i2o_device_issue_claim(struct i2o_device *dev, u32 cmd,
u32 type)
{
struct i2o_message __iomem *msg;
u32 m;
struct i2o_message *msg;
m = i2o_msg_get_wait(dev->iop, &msg, I2O_TIMEOUT_MESSAGE_GET);
if (m == I2O_QUEUE_EMPTY)
return -ETIMEDOUT;
msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET);
if (IS_ERR(msg))
return PTR_ERR(msg);
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]);
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, m, 60);
return i2o_msg_post_wait(dev->iop, msg, 60);
}
/**
@@ -419,10 +419,9 @@ int i2o_device_parse_lct(struct i2o_controller *c)
* ResultCount, ErrorInfoSize, BlockStatus and BlockSize.
*/
int i2o_parm_issue(struct i2o_device *i2o_dev, int cmd, void *oplist,
int oplen, void *reslist, int reslen)
int oplen, void *reslist, int reslen)
{
struct i2o_message __iomem *msg;
u32 m;
struct i2o_message *msg;
u32 *res32 = (u32 *) reslist;
u32 *restmp = (u32 *) reslist;
int len = 0;
@@ -437,26 +436,28 @@ int i2o_parm_issue(struct i2o_device *i2o_dev, int cmd, void *oplist,
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) {
msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
if (IS_ERR(msg)) {
i2o_dma_free(dev, &res);
return -ETIMEDOUT;
return PTR_ERR(msg);
}
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);
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));
writel(0xD0000000 | res.len, &msg->body[i++]); /* ResultList */
writel(res.phys, &msg->body[i++]);
msg->body[i++] = cpu_to_le32(0xD0000000 | res.len); /* ResultList */
msg->body[i++] = cpu_to_le32(res.phys);
writel(I2O_MESSAGE_SIZE(i + sizeof(struct i2o_message) / 4) |
SGL_OFFSET_5, &msg->u.head[0]);
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, m, 10, &res);
rc = i2o_msg_post_wait_mem(c, msg, 10, &res);
/* This only looks like a memory leak - don't "fix" it. */
if (rc == -ETIMEDOUT)