From a1a5ea70a6e9db6332b27fe2d96666e17aa1436b Mon Sep 17 00:00:00 2001 From: Markus Lidel Date: Fri, 6 Jan 2006 00:19:29 -0800 Subject: [PATCH] I2O: changed I2O API to create I2O messages in kernel memory 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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/message/i2o/exec-osm.c | 93 +++++++++++++++++++++--------------------- 1 file changed, 47 insertions(+), 46 deletions(-) (limited to 'drivers/message/i2o/exec-osm.c') diff --git a/drivers/message/i2o/exec-osm.c b/drivers/message/i2o/exec-osm.c index 9c339a2505b..71a09332e7c 100644 --- a/drivers/message/i2o/exec-osm.c +++ b/drivers/message/i2o/exec-osm.c @@ -114,13 +114,12 @@ static void i2o_exec_wait_free(struct i2o_exec_wait *wait) * Returns 0 on success, negative error code on timeout or positive error * code from reply. */ -int i2o_msg_post_wait_mem(struct i2o_controller *c, u32 m, unsigned long - timeout, struct i2o_dma *dma) +int i2o_msg_post_wait_mem(struct i2o_controller *c, struct i2o_message *msg, + unsigned long timeout, struct i2o_dma *dma) { DECLARE_WAIT_QUEUE_HEAD(wq); struct i2o_exec_wait *wait; static u32 tcntxt = 0x80000000; - struct i2o_message __iomem *msg = i2o_msg_in_to_virt(c, m); int rc = 0; wait = i2o_exec_wait_alloc(); @@ -138,15 +137,15 @@ int i2o_msg_post_wait_mem(struct i2o_controller *c, u32 m, unsigned long * We will only use transaction contexts >= 0x80000000 for POST WAIT, * so we could find a POST WAIT reply easier in the reply handler. */ - writel(i2o_exec_driver.context, &msg->u.s.icntxt); + msg->u.s.icntxt = cpu_to_le32(i2o_exec_driver.context); wait->tcntxt = tcntxt++; - writel(wait->tcntxt, &msg->u.s.tcntxt); + msg->u.s.tcntxt = cpu_to_le32(wait->tcntxt); /* * Post the message to the controller. At some point later it will * return. If we time out before it returns then complete will be zero. */ - i2o_msg_post(c, m); + i2o_msg_post(c, msg); if (!wait->complete) { wait->wq = &wq; @@ -266,7 +265,8 @@ static int i2o_msg_post_wait_complete(struct i2o_controller *c, u32 m, * * Returns number of bytes printed into buffer. */ -static ssize_t i2o_exec_show_vendor_id(struct device *d, struct device_attribute *attr, char *buf) +static ssize_t i2o_exec_show_vendor_id(struct device *d, + struct device_attribute *attr, char *buf) { struct i2o_device *dev = to_i2o_device(d); u16 id; @@ -286,7 +286,9 @@ static ssize_t i2o_exec_show_vendor_id(struct device *d, struct device_attribute * * Returns number of bytes printed into buffer. */ -static ssize_t i2o_exec_show_product_id(struct device *d, struct device_attribute *attr, char *buf) +static ssize_t i2o_exec_show_product_id(struct device *d, + struct device_attribute *attr, + char *buf) { struct i2o_device *dev = to_i2o_device(d); u16 id; @@ -385,23 +387,22 @@ static int i2o_exec_reply(struct i2o_controller *c, u32 m, u32 context; if (le32_to_cpu(msg->u.head[0]) & MSG_FAIL) { + struct i2o_message __iomem *pmsg; + u32 pm; + /* * If Fail bit is set we must take the transaction context of * the preserved message to find the right request again. */ - struct i2o_message __iomem *pmsg; - u32 pm; pm = le32_to_cpu(msg->body[3]); - pmsg = i2o_msg_in_to_virt(c, pm); + context = readl(&pmsg->u.s.tcntxt); i2o_report_status(KERN_INFO, "i2o_core", msg); - context = readl(&pmsg->u.s.tcntxt); - /* Release the preserved msg */ - i2o_msg_nop(c, pm); + i2o_msg_nop_mfa(c, pm); } else context = le32_to_cpu(msg->u.s.tcntxt); @@ -462,25 +463,26 @@ static void i2o_exec_event(struct i2o_event *evt) */ int i2o_exec_lct_get(struct i2o_controller *c) { - struct i2o_message __iomem *msg; - u32 m; + struct i2o_message *msg; int i = 0; int rc = -EAGAIN; for (i = 1; i <= I2O_LCT_GET_TRIES; i++) { - m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET); - if (m == I2O_QUEUE_EMPTY) - return -ETIMEDOUT; - - writel(EIGHT_WORD_MSG_SIZE | SGL_OFFSET_6, &msg->u.head[0]); - writel(I2O_CMD_LCT_NOTIFY << 24 | HOST_TID << 12 | ADAPTER_TID, - &msg->u.head[1]); - writel(0xffffffff, &msg->body[0]); - writel(0x00000000, &msg->body[1]); - writel(0xd0000000 | c->dlct.len, &msg->body[2]); - writel(c->dlct.phys, &msg->body[3]); - - rc = i2o_msg_post_wait(c, m, I2O_TIMEOUT_LCT_GET); + msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET); + if (IS_ERR(msg)) + return PTR_ERR(msg); + + msg->u.head[0] = + cpu_to_le32(EIGHT_WORD_MSG_SIZE | SGL_OFFSET_6); + msg->u.head[1] = + cpu_to_le32(I2O_CMD_LCT_NOTIFY << 24 | HOST_TID << 12 | + ADAPTER_TID); + msg->body[0] = cpu_to_le32(0xffffffff); + msg->body[1] = cpu_to_le32(0x00000000); + msg->body[2] = cpu_to_le32(0xd0000000 | c->dlct.len); + msg->body[3] = cpu_to_le32(c->dlct.phys); + + rc = i2o_msg_post_wait(c, msg, I2O_TIMEOUT_LCT_GET); if (rc < 0) break; @@ -506,29 +508,28 @@ static int i2o_exec_lct_notify(struct i2o_controller *c, u32 change_ind) { i2o_status_block *sb = c->status_block.virt; struct device *dev; - struct i2o_message __iomem *msg; - u32 m; + struct i2o_message *msg; dev = &c->pdev->dev; if (i2o_dma_realloc(dev, &c->dlct, sb->expected_lct_size, GFP_KERNEL)) return -ENOMEM; - m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET); - if (m == I2O_QUEUE_EMPTY) - return -ETIMEDOUT; - - writel(EIGHT_WORD_MSG_SIZE | SGL_OFFSET_6, &msg->u.head[0]); - writel(I2O_CMD_LCT_NOTIFY << 24 | HOST_TID << 12 | ADAPTER_TID, - &msg->u.head[1]); - writel(i2o_exec_driver.context, &msg->u.s.icntxt); - writel(0, &msg->u.s.tcntxt); /* FIXME */ - writel(0xffffffff, &msg->body[0]); - writel(change_ind, &msg->body[1]); - writel(0xd0000000 | c->dlct.len, &msg->body[2]); - writel(c->dlct.phys, &msg->body[3]); - - i2o_msg_post(c, m); + msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET); + if (IS_ERR(msg)) + return PTR_ERR(msg); + + msg->u.head[0] = cpu_to_le32(EIGHT_WORD_MSG_SIZE | SGL_OFFSET_6); + msg->u.head[1] = cpu_to_le32(I2O_CMD_LCT_NOTIFY << 24 | HOST_TID << 12 | + ADAPTER_TID); + msg->u.s.icntxt = cpu_to_le32(i2o_exec_driver.context); + msg->u.s.tcntxt = cpu_to_le32(0x00000000); + msg->body[0] = cpu_to_le32(0xffffffff); + msg->body[1] = cpu_to_le32(change_ind); + msg->body[2] = cpu_to_le32(0xd0000000 | c->dlct.len); + msg->body[3] = cpu_to_le32(c->dlct.phys); + + i2o_msg_post(c, msg); return 0; }; -- cgit v1.2.3