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path: root/drivers/misc/mei/amthif.c
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Diffstat (limited to 'drivers/misc/mei/amthif.c')
-rw-r--r--drivers/misc/mei/amthif.c72
1 files changed, 30 insertions, 42 deletions
diff --git a/drivers/misc/mei/amthif.c b/drivers/misc/mei/amthif.c
index 2fad84432829..b8deb3455480 100644
--- a/drivers/misc/mei/amthif.c
+++ b/drivers/misc/mei/amthif.c
@@ -21,7 +21,6 @@
#include <linux/fcntl.h>
#include <linux/aio.h>
#include <linux/pci.h>
-#include <linux/init.h>
#include <linux/ioctl.h>
#include <linux/cdev.h>
#include <linux/list.h>
@@ -35,7 +34,6 @@
#include "mei_dev.h"
#include "hbm.h"
-#include "hw-me.h"
#include "client.h"
const uuid_le mei_amthif_guid = UUID_LE(0x12f80028, 0xb4b7, 0x4b2d,
@@ -79,10 +77,9 @@ int mei_amthif_host_init(struct mei_device *dev)
i = mei_me_cl_by_uuid(dev, &mei_amthif_guid);
if (i < 0) {
- ret = i;
dev_info(&dev->pdev->dev,
- "amthif: failed to find the client %d\n", ret);
- return ret;
+ "amthif: failed to find the client %d\n", i);
+ return -ENOTTY;
}
cl->me_client_id = dev->me_clients[i].client_id;
@@ -116,14 +113,11 @@ int mei_amthif_host_init(struct mei_device *dev)
cl->state = MEI_FILE_CONNECTING;
- if (mei_hbm_cl_connect_req(dev, cl)) {
- dev_dbg(&dev->pdev->dev, "amthif: Failed to connect to ME client\n");
- cl->state = MEI_FILE_DISCONNECTED;
- cl->host_client_id = 0;
- } else {
- cl->timer_count = MEI_CONNECT_TIMEOUT;
- }
- return 0;
+ ret = mei_cl_connect(cl, NULL);
+
+ dev->iamthif_state = MEI_IAMTHIF_IDLE;
+
+ return ret;
}
/**
@@ -137,14 +131,12 @@ int mei_amthif_host_init(struct mei_device *dev)
struct mei_cl_cb *mei_amthif_find_read_list_entry(struct mei_device *dev,
struct file *file)
{
- struct mei_cl_cb *pos = NULL;
- struct mei_cl_cb *next = NULL;
+ struct mei_cl_cb *cb;
- list_for_each_entry_safe(pos, next,
- &dev->amthif_rd_complete_list.list, list) {
- if (pos->cl && pos->cl == &dev->iamthif_cl &&
- pos->file_object == file)
- return pos;
+ list_for_each_entry(cb, &dev->amthif_rd_complete_list.list, list) {
+ if (cb->cl && cb->cl == &dev->iamthif_cl &&
+ cb->file_object == file)
+ return cb;
}
return NULL;
}
@@ -180,14 +172,13 @@ int mei_amthif_read(struct mei_device *dev, struct file *file,
/* Only possible if we are in timeout */
if (!cl || cl != &dev->iamthif_cl) {
dev_dbg(&dev->pdev->dev, "bad file ext.\n");
- return -ETIMEDOUT;
+ return -ETIME;
}
i = mei_me_cl_by_id(dev, dev->iamthif_cl.me_client_id);
-
if (i < 0) {
dev_dbg(&dev->pdev->dev, "amthif client not found.\n");
- return -ENODEV;
+ return -ENOTTY;
}
dev_dbg(&dev->pdev->dev, "checking amthif data\n");
cb = mei_amthif_find_read_list_entry(dev, file);
@@ -228,7 +219,7 @@ int mei_amthif_read(struct mei_device *dev, struct file *file,
dev_dbg(&dev->pdev->dev, "amthif Time out\n");
/* 15 sec for the message has expired */
list_del(&cb->list);
- rets = -ETIMEDOUT;
+ rets = -ETIME;
goto free;
}
}
@@ -253,9 +244,10 @@ int mei_amthif_read(struct mei_device *dev, struct file *file,
* the buf_idx may point beyond */
length = min_t(size_t, length, (cb->buf_idx - *offset));
- if (copy_to_user(ubuf, cb->response_buffer.data + *offset, length))
+ if (copy_to_user(ubuf, cb->response_buffer.data + *offset, length)) {
+ dev_dbg(&dev->pdev->dev, "failed to copy data to userland\n");
rets = -EFAULT;
- else {
+ } else {
rets = length;
if ((*offset + length) < cb->buf_idx) {
*offset += length;
@@ -302,9 +294,8 @@ static int mei_amthif_send_cmd(struct mei_device *dev, struct mei_cl_cb *cb)
if (ret < 0)
return ret;
- if (ret && dev->hbuf_is_ready) {
+ if (ret && mei_hbuf_acquire(dev)) {
ret = 0;
- dev->hbuf_is_ready = false;
if (cb->request_buffer.size > mei_hbuf_max_len(dev)) {
mei_hdr.length = mei_hbuf_max_len(dev);
mei_hdr.msg_complete = 0;
@@ -336,10 +327,6 @@ static int mei_amthif_send_cmd(struct mei_device *dev, struct mei_cl_cb *cb)
list_add_tail(&cb->list, &dev->write_list.list);
}
} else {
- if (!dev->hbuf_is_ready)
- dev_dbg(&dev->pdev->dev, "host buffer is not empty");
-
- dev_dbg(&dev->pdev->dev, "No flow control credentials, so add iamthif cb to write list.\n");
list_add_tail(&cb->list, &dev->write_list.list);
}
return 0;
@@ -365,7 +352,7 @@ int mei_amthif_write(struct mei_device *dev, struct mei_cl_cb *cb)
if (ret)
return ret;
- cb->fop_type = MEI_FOP_IOCTL;
+ cb->fop_type = MEI_FOP_WRITE;
if (!list_empty(&dev->amthif_cmd_list.list) ||
dev->iamthif_state != MEI_IAMTHIF_IDLE) {
@@ -447,23 +434,23 @@ unsigned int mei_amthif_poll(struct mei_device *dev,
/**
- * mei_amthif_irq_write_completed - processes completed iamthif operation.
+ * mei_amthif_irq_write - write iamthif command in irq thread context.
*
* @dev: the device structure.
- * @slots: free slots.
* @cb_pos: callback block.
* @cl: private data of the file object.
* @cmpl_list: complete list.
*
* returns 0, OK; otherwise, error.
*/
-int mei_amthif_irq_write_complete(struct mei_cl *cl, struct mei_cl_cb *cb,
- s32 *slots, struct mei_cl_cb *cmpl_list)
+int mei_amthif_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb,
+ struct mei_cl_cb *cmpl_list)
{
struct mei_device *dev = cl->dev;
struct mei_msg_hdr mei_hdr;
size_t len = dev->iamthif_msg_buf_size - dev->iamthif_msg_buf_index;
u32 msg_slots = mei_data2slots(len);
+ int slots;
int rets;
rets = mei_cl_flow_ctrl_creds(cl);
@@ -480,13 +467,15 @@ int mei_amthif_irq_write_complete(struct mei_cl *cl, struct mei_cl_cb *cb,
mei_hdr.reserved = 0;
mei_hdr.internal = 0;
- if (*slots >= msg_slots) {
+ slots = mei_hbuf_empty_slots(dev);
+
+ if (slots >= msg_slots) {
mei_hdr.length = len;
mei_hdr.msg_complete = 1;
/* Split the message only if we can write the whole host buffer */
- } else if (*slots == dev->hbuf_depth) {
- msg_slots = *slots;
- len = (*slots * sizeof(u32)) - sizeof(struct mei_msg_hdr);
+ } else if (slots == dev->hbuf_depth) {
+ msg_slots = slots;
+ len = (slots * sizeof(u32)) - sizeof(struct mei_msg_hdr);
mei_hdr.length = len;
mei_hdr.msg_complete = 0;
} else {
@@ -496,7 +485,6 @@ int mei_amthif_irq_write_complete(struct mei_cl *cl, struct mei_cl_cb *cb,
dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(&mei_hdr));
- *slots -= msg_slots;
rets = mei_write_message(dev, &mei_hdr,
dev->iamthif_msg_buf + dev->iamthif_msg_buf_index);
if (rets) {
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