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path: root/drivers/misc/mei/interrupt.c
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Diffstat (limited to 'drivers/misc/mei/interrupt.c')
-rw-r--r--drivers/misc/mei/interrupt.c122
1 files changed, 66 insertions, 56 deletions
diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c
index 7a95c07e59a..f0fbb5179f8 100644
--- a/drivers/misc/mei/interrupt.c
+++ b/drivers/misc/mei/interrupt.c
@@ -31,7 +31,7 @@
/**
- * mei_irq_compl_handler - dispatch complete handelers
+ * mei_irq_compl_handler - dispatch complete handlers
* for the completed callbacks
*
* @dev - mei device
@@ -301,13 +301,11 @@ int mei_irq_read_handler(struct mei_device *dev,
struct mei_cl_cb *cmpl_list, s32 *slots)
{
struct mei_msg_hdr *mei_hdr;
- struct mei_cl *cl_pos = NULL;
- struct mei_cl *cl_next = NULL;
- int ret = 0;
+ struct mei_cl *cl;
+ int ret;
if (!dev->rd_msg_hdr) {
dev->rd_msg_hdr = mei_read_hdr(dev);
- dev_dbg(&dev->pdev->dev, "slots =%08x.\n", *slots);
(*slots)--;
dev_dbg(&dev->pdev->dev, "slots =%08x.\n", *slots);
}
@@ -315,61 +313,67 @@ int mei_irq_read_handler(struct mei_device *dev,
dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(mei_hdr));
if (mei_hdr->reserved || !dev->rd_msg_hdr) {
- dev_dbg(&dev->pdev->dev, "corrupted message header.\n");
+ dev_err(&dev->pdev->dev, "corrupted message header 0x%08X\n",
+ dev->rd_msg_hdr);
ret = -EBADMSG;
goto end;
}
- if (mei_hdr->host_addr || mei_hdr->me_addr) {
- list_for_each_entry_safe(cl_pos, cl_next,
- &dev->file_list, link) {
- dev_dbg(&dev->pdev->dev,
- "list_for_each_entry_safe read host"
- " client = %d, ME client = %d\n",
- cl_pos->host_client_id,
- cl_pos->me_client_id);
- if (mei_cl_hbm_equal(cl_pos, mei_hdr))
- break;
- }
-
- if (&cl_pos->link == &dev->file_list) {
- dev_dbg(&dev->pdev->dev, "corrupted message header\n");
- ret = -EBADMSG;
- goto end;
- }
- }
- if (((*slots) * sizeof(u32)) < mei_hdr->length) {
- dev_err(&dev->pdev->dev,
- "we can't read the message slots =%08x.\n",
+ if (mei_slots2data(*slots) < mei_hdr->length) {
+ dev_err(&dev->pdev->dev, "less data available than length=%08x.\n",
*slots);
/* we can't read the message */
ret = -ERANGE;
goto end;
}
- /* decide where to read the message too */
- if (!mei_hdr->host_addr) {
- dev_dbg(&dev->pdev->dev, "call mei_hbm_dispatch.\n");
- mei_hbm_dispatch(dev, mei_hdr);
- dev_dbg(&dev->pdev->dev, "end mei_hbm_dispatch.\n");
- } else if (mei_hdr->host_addr == dev->iamthif_cl.host_client_id &&
- (MEI_FILE_CONNECTED == dev->iamthif_cl.state) &&
- (dev->iamthif_state == MEI_IAMTHIF_READING)) {
+ /* HBM message */
+ if (mei_hdr->host_addr == 0 && mei_hdr->me_addr == 0) {
+ ret = mei_hbm_dispatch(dev, mei_hdr);
+ if (ret) {
+ dev_dbg(&dev->pdev->dev, "mei_hbm_dispatch failed ret = %d\n",
+ ret);
+ goto end;
+ }
+ goto reset_slots;
+ }
+
+ /* find recipient cl */
+ list_for_each_entry(cl, &dev->file_list, link) {
+ if (mei_cl_hbm_equal(cl, mei_hdr)) {
+ cl_dbg(dev, cl, "got a message\n");
+ break;
+ }
+ }
+
+ /* if no recipient cl was found we assume corrupted header */
+ if (&cl->link == &dev->file_list) {
+ dev_err(&dev->pdev->dev, "no destination client found 0x%08X\n",
+ dev->rd_msg_hdr);
+ ret = -EBADMSG;
+ goto end;
+ }
- dev_dbg(&dev->pdev->dev, "call mei_amthif_irq_read_msg.\n");
- dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(mei_hdr));
+ if (mei_hdr->host_addr == dev->iamthif_cl.host_client_id &&
+ MEI_FILE_CONNECTED == dev->iamthif_cl.state &&
+ dev->iamthif_state == MEI_IAMTHIF_READING) {
ret = mei_amthif_irq_read_msg(dev, mei_hdr, cmpl_list);
- if (ret)
+ if (ret) {
+ dev_err(&dev->pdev->dev, "mei_amthif_irq_read_msg failed = %d\n",
+ ret);
goto end;
+ }
} else {
- dev_dbg(&dev->pdev->dev, "call mei_cl_irq_read_msg.\n");
- dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(mei_hdr));
ret = mei_cl_irq_read_msg(dev, mei_hdr, cmpl_list);
- if (ret)
+ if (ret) {
+ dev_err(&dev->pdev->dev, "mei_cl_irq_read_msg failed = %d\n",
+ ret);
goto end;
+ }
}
+reset_slots:
/* reset the number of slots and header */
*slots = mei_count_full_read_slots(dev);
dev->rd_msg_hdr = 0;
@@ -533,7 +537,6 @@ EXPORT_SYMBOL_GPL(mei_irq_write_handler);
*
* @work: pointer to the work_struct structure
*
- * NOTE: This function is called by timer interrupt work
*/
void mei_timer(struct work_struct *work)
{
@@ -548,24 +551,30 @@ void mei_timer(struct work_struct *work)
mutex_lock(&dev->device_lock);
- if (dev->dev_state != MEI_DEV_ENABLED) {
- if (dev->dev_state == MEI_DEV_INIT_CLIENTS) {
- if (dev->init_clients_timer) {
- if (--dev->init_clients_timer == 0) {
- dev_err(&dev->pdev->dev, "reset: init clients timeout hbm_state = %d.\n",
- dev->hbm_state);
- mei_reset(dev, 1);
- }
+
+ /* Catch interrupt stalls during HBM init handshake */
+ if (dev->dev_state == MEI_DEV_INIT_CLIENTS &&
+ dev->hbm_state != MEI_HBM_IDLE) {
+
+ if (dev->init_clients_timer) {
+ if (--dev->init_clients_timer == 0) {
+ dev_err(&dev->pdev->dev, "timer: init clients timeout hbm_state = %d.\n",
+ dev->hbm_state);
+ mei_reset(dev);
+ goto out;
}
}
- goto out;
}
+
+ if (dev->dev_state != MEI_DEV_ENABLED)
+ goto out;
+
/*** connect/disconnect timeouts ***/
list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) {
if (cl_pos->timer_count) {
if (--cl_pos->timer_count == 0) {
- dev_err(&dev->pdev->dev, "reset: connect/disconnect timeout.\n");
- mei_reset(dev, 1);
+ dev_err(&dev->pdev->dev, "timer: connect/disconnect timeout.\n");
+ mei_reset(dev);
goto out;
}
}
@@ -573,8 +582,8 @@ void mei_timer(struct work_struct *work)
if (dev->iamthif_stall_timer) {
if (--dev->iamthif_stall_timer == 0) {
- dev_err(&dev->pdev->dev, "reset: amthif hanged.\n");
- mei_reset(dev, 1);
+ dev_err(&dev->pdev->dev, "timer: amthif hanged.\n");
+ mei_reset(dev);
dev->iamthif_msg_buf_size = 0;
dev->iamthif_msg_buf_index = 0;
dev->iamthif_canceled = false;
@@ -627,7 +636,8 @@ void mei_timer(struct work_struct *work)
}
}
out:
- schedule_delayed_work(&dev->timer_work, 2 * HZ);
+ if (dev->dev_state != MEI_DEV_DISABLED)
+ schedule_delayed_work(&dev->timer_work, 2 * HZ);
mutex_unlock(&dev->device_lock);
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-12 02:56:33 +0000