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Date: Mon, 25 Jun 2012 23:46:28 +0300
From: Tomas Winkler <tomas.winkler@...el.com>
To: gregkh@...uxfoundation.org
Cc: arnd@...db.de, alan@...ux.intel.com, linux-kernel@...r.kernel.org,
Tomas Winkler <tomas.winkler@...el.com>
Subject: [char-misc-next 2/2] mei: revamp host buffer interface function
1. Use unified _hbuf_ prefix for host/write buffer functions.
2. Cleanup the code w/o functional changes.
Signed-off-by: Tomas Winkler <tomas.winkler@...el.com>
---
drivers/misc/mei/interface.c | 31 ++++++++++++-------------------
drivers/misc/mei/interface.h | 14 ++++++++------
drivers/misc/mei/interrupt.c | 8 ++++----
3 files changed, 24 insertions(+), 29 deletions(-)
diff --git a/drivers/misc/mei/interface.c b/drivers/misc/mei/interface.c
index 784a606..88ada64 100644
--- a/drivers/misc/mei/interface.c
+++ b/drivers/misc/mei/interface.c
@@ -58,16 +58,18 @@ void mei_disable_interrupts(struct mei_device *dev)
}
/**
- * _host_get_filled_slots - gets number of device filled buffer slots
+ * mei_hbuf_filled_slots - gets number of device filled buffer slots
*
* @device: the device structure
*
* returns number of filled slots
*/
-static unsigned char _host_get_filled_slots(const struct mei_device *dev)
+static unsigned char mei_hbuf_filled_slots(struct mei_device *dev)
{
char read_ptr, write_ptr;
+ dev->host_hw_state = mei_hcsr_read(dev);
+
read_ptr = (char) ((dev->host_hw_state & H_CBRP) >> 8);
write_ptr = (char) ((dev->host_hw_state & H_CBWP) >> 16);
@@ -75,38 +77,29 @@ static unsigned char _host_get_filled_slots(const struct mei_device *dev)
}
/**
- * mei_host_buffer_is_empty - checks if host buffer is empty.
+ * mei_hbuf_is_empty - checks if host buffer is empty.
*
* @dev: the device structure
*
- * returns 1 if empty, 0 - otherwise.
+ * returns true if empty, false - otherwise.
*/
-int mei_host_buffer_is_empty(struct mei_device *dev)
+bool mei_hbuf_is_empty(struct mei_device *dev)
{
- unsigned char filled_slots;
-
- dev->host_hw_state = mei_hcsr_read(dev);
- filled_slots = _host_get_filled_slots(dev);
-
- if (filled_slots == 0)
- return 1;
-
- return 0;
+ return mei_hbuf_filled_slots(dev) == 0;
}
/**
- * mei_count_empty_write_slots - counts write empty slots.
+ * mei_hbuf_empty_slots - counts write empty slots.
*
* @dev: the device structure
*
* returns -1(ESLOTS_OVERFLOW) if overflow, otherwise empty slots count
*/
-int mei_count_empty_write_slots(struct mei_device *dev)
+int mei_hbuf_empty_slots(struct mei_device *dev)
{
unsigned char filled_slots, empty_slots;
- dev->host_hw_state = mei_hcsr_read(dev);
- filled_slots = _host_get_filled_slots(dev);
+ filled_slots = mei_hbuf_filled_slots(dev);
empty_slots = dev->hbuf_depth - filled_slots;
/* check for overflow */
@@ -139,7 +132,7 @@ int mei_write_message(struct mei_device *dev, struct mei_msg_hdr *header,
"mei_write_message header=%08x.\n",
*((u32 *) header));
- empty_slots = mei_count_empty_write_slots(dev);
+ empty_slots = mei_hbuf_empty_slots(dev);
dev_dbg(&dev->pdev->dev, "empty slots = %hu.\n", empty_slots);
dw_cnt = (length + sizeof(*header) + 3) / 4;
diff --git a/drivers/misc/mei/interface.h b/drivers/misc/mei/interface.h
index 8723d88..cd9b778 100644
--- a/drivers/misc/mei/interface.h
+++ b/drivers/misc/mei/interface.h
@@ -41,19 +41,21 @@ int mei_write_message(struct mei_device *dev,
unsigned char *write_buffer,
unsigned long write_length);
-int mei_host_buffer_is_empty(struct mei_device *dev);
+bool mei_hbuf_is_empty(struct mei_device *dev);
-int mei_count_full_read_slots(struct mei_device *dev);
-
-int mei_count_empty_write_slots(struct mei_device *dev);
-
-int mei_flow_ctrl_creds(struct mei_device *dev, struct mei_cl *cl);
+int mei_hbuf_empty_slots(struct mei_device *dev);
static inline size_t mei_hbuf_max_data(const struct mei_device *dev)
{
return dev->hbuf_depth * sizeof(u32) - sizeof(struct mei_msg_hdr);
}
+int mei_count_full_read_slots(struct mei_device *dev);
+
+
+int mei_flow_ctrl_creds(struct mei_device *dev, struct mei_cl *cl);
+
+
int mei_wd_send(struct mei_device *dev);
int mei_wd_stop(struct mei_device *dev, bool preserve);
diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c
index ebf97d3..013641d 100644
--- a/drivers/misc/mei/interrupt.c
+++ b/drivers/misc/mei/interrupt.c
@@ -280,7 +280,7 @@ static int _mei_irq_thread_iamthif_read(struct mei_device *dev, s32 *slots)
dev->iamthif_msg_buf_index = 0;
dev->iamthif_msg_buf_size = 0;
dev->iamthif_stall_timer = IAMTHIF_STALL_TIMER;
- dev->mei_host_buffer_is_empty = mei_host_buffer_is_empty(dev);
+ dev->mei_host_buffer_is_empty = mei_hbuf_is_empty(dev);
return 0;
}
@@ -1199,11 +1199,11 @@ static int mei_irq_thread_write_handler(struct mei_io_list *cmpl_list,
struct mei_io_list *list;
int ret;
- if (!mei_host_buffer_is_empty(dev)) {
+ if (!mei_hbuf_is_empty(dev)) {
dev_dbg(&dev->pdev->dev, "host buffer is not empty.\n");
return 0;
}
- *slots = mei_count_empty_write_slots(dev);
+ *slots = mei_hbuf_empty_slots(dev);
if (*slots <= 0)
return -EMSGSIZE;
@@ -1558,7 +1558,7 @@ irqreturn_t mei_interrupt_thread_handler(int irq, void *dev_id)
end:
dev_dbg(&dev->pdev->dev, "end of bottom half function.\n");
dev->host_hw_state = mei_hcsr_read(dev);
- dev->mei_host_buffer_is_empty = mei_host_buffer_is_empty(dev);
+ dev->mei_host_buffer_is_empty = mei_hbuf_is_empty(dev);
bus_message_received = false;
if (dev->recvd_msg && waitqueue_active(&dev->wait_recvd_msg)) {
--
1.7.4.4
--
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