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path: root/drivers/misc/mei/client.c
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Diffstat (limited to 'drivers/misc/mei/client.c')
-rw-r--r--drivers/misc/mei/client.c90
1 files changed, 74 insertions, 16 deletions
diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c
index 8c078b808cd3..59d20c599b16 100644
--- a/drivers/misc/mei/client.c
+++ b/drivers/misc/mei/client.c
@@ -18,6 +18,7 @@
#include <linux/sched.h>
#include <linux/wait.h>
#include <linux/delay.h>
+#include <linux/pm_runtime.h>
#include <linux/mei.h>
@@ -415,6 +416,10 @@ void mei_host_client_init(struct work_struct *work)
dev->reset_count = 0;
mutex_unlock(&dev->device_lock);
+
+ pm_runtime_mark_last_busy(&dev->pdev->dev);
+ dev_dbg(&dev->pdev->dev, "rpm: autosuspend\n");
+ pm_runtime_autosuspend(&dev->pdev->dev);
}
/**
@@ -425,6 +430,12 @@ void mei_host_client_init(struct work_struct *work)
*/
bool mei_hbuf_acquire(struct mei_device *dev)
{
+ if (mei_pg_state(dev) == MEI_PG_ON ||
+ dev->pg_event == MEI_PG_EVENT_WAIT) {
+ dev_dbg(&dev->pdev->dev, "device is in pg\n");
+ return false;
+ }
+
if (!dev->hbuf_is_ready) {
dev_dbg(&dev->pdev->dev, "hbuf is not ready\n");
return false;
@@ -460,9 +471,18 @@ int mei_cl_disconnect(struct mei_cl *cl)
if (cl->state != MEI_FILE_DISCONNECTING)
return 0;
+ rets = pm_runtime_get(&dev->pdev->dev);
+ if (rets < 0 && rets != -EINPROGRESS) {
+ pm_runtime_put_noidle(&dev->pdev->dev);
+ cl_err(dev, cl, "rpm: get failed %d\n", rets);
+ return rets;
+ }
+
cb = mei_io_cb_init(cl, NULL);
- if (!cb)
- return -ENOMEM;
+ if (!cb) {
+ rets = -ENOMEM;
+ goto free;
+ }
cb->fop_type = MEI_FOP_CLOSE;
if (mei_hbuf_acquire(dev)) {
@@ -494,8 +514,7 @@ int mei_cl_disconnect(struct mei_cl *cl)
cl_err(dev, cl, "wrong status client disconnect.\n");
if (err)
- cl_dbg(dev, cl, "wait failed disconnect err=%08x\n",
- err);
+ cl_dbg(dev, cl, "wait failed disconnect err=%d\n", err);
cl_err(dev, cl, "failed to disconnect from FW client.\n");
}
@@ -503,6 +522,10 @@ int mei_cl_disconnect(struct mei_cl *cl)
mei_io_list_flush(&dev->ctrl_rd_list, cl);
mei_io_list_flush(&dev->ctrl_wr_list, cl);
free:
+ cl_dbg(dev, cl, "rpm: autosuspend\n");
+ pm_runtime_mark_last_busy(&dev->pdev->dev);
+ pm_runtime_put_autosuspend(&dev->pdev->dev);
+
mei_io_cb_free(cb);
return rets;
}
@@ -557,6 +580,13 @@ int mei_cl_connect(struct mei_cl *cl, struct file *file)
dev = cl->dev;
+ rets = pm_runtime_get(&dev->pdev->dev);
+ if (rets < 0 && rets != -EINPROGRESS) {
+ pm_runtime_put_noidle(&dev->pdev->dev);
+ cl_err(dev, cl, "rpm: get failed %d\n", rets);
+ return rets;
+ }
+
cb = mei_io_cb_init(cl, file);
if (!cb) {
rets = -ENOMEM;
@@ -567,6 +597,7 @@ int mei_cl_connect(struct mei_cl *cl, struct file *file)
/* run hbuf acquire last so we don't have to undo */
if (!mei_cl_is_other_connecting(cl) && mei_hbuf_acquire(dev)) {
+ cl->state = MEI_FILE_CONNECTING;
if (mei_hbm_cl_connect_req(dev, cl)) {
rets = -ENODEV;
goto out;
@@ -596,6 +627,10 @@ int mei_cl_connect(struct mei_cl *cl, struct file *file)
rets = cl->status;
out:
+ cl_dbg(dev, cl, "rpm: autosuspend\n");
+ pm_runtime_mark_last_busy(&dev->pdev->dev);
+ pm_runtime_put_autosuspend(&dev->pdev->dev);
+
mei_io_cb_free(cb);
return rets;
}
@@ -713,23 +748,31 @@ int mei_cl_read_start(struct mei_cl *cl, size_t length)
return -ENOTTY;
}
+ rets = pm_runtime_get(&dev->pdev->dev);
+ if (rets < 0 && rets != -EINPROGRESS) {
+ pm_runtime_put_noidle(&dev->pdev->dev);
+ cl_err(dev, cl, "rpm: get failed %d\n", rets);
+ return rets;
+ }
+
cb = mei_io_cb_init(cl, NULL);
- if (!cb)
- return -ENOMEM;
+ if (!cb) {
+ rets = -ENOMEM;
+ goto out;
+ }
/* always allocate at least client max message */
length = max_t(size_t, length, dev->me_clients[i].props.max_msg_length);
rets = mei_io_cb_alloc_resp_buf(cb, length);
if (rets)
- goto err;
+ goto out;
cb->fop_type = MEI_FOP_READ;
if (mei_hbuf_acquire(dev)) {
- if (mei_hbm_cl_flow_control_req(dev, cl)) {
- cl_err(dev, cl, "flow control send failed\n");
- rets = -ENODEV;
- goto err;
- }
+ rets = mei_hbm_cl_flow_control_req(dev, cl);
+ if (rets < 0)
+ goto out;
+
list_add_tail(&cb->list, &dev->read_list.list);
} else {
list_add_tail(&cb->list, &dev->ctrl_wr_list.list);
@@ -737,9 +780,14 @@ int mei_cl_read_start(struct mei_cl *cl, size_t length)
cl->read_cb = cb;
- return rets;
-err:
- mei_io_cb_free(cb);
+out:
+ cl_dbg(dev, cl, "rpm: autosuspend\n");
+ pm_runtime_mark_last_busy(&dev->pdev->dev);
+ pm_runtime_put_autosuspend(&dev->pdev->dev);
+
+ if (rets)
+ mei_io_cb_free(cb);
+
return rets;
}
@@ -776,7 +824,7 @@ int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb,
return rets;
if (rets == 0) {
- cl_dbg(dev, cl, "No flow control credentials: not sending.\n");
+ cl_dbg(dev, cl, "No flow control credentials: not sending.\n");
return 0;
}
@@ -856,6 +904,12 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking)
cl_dbg(dev, cl, "mei_cl_write %d\n", buf->size);
+ rets = pm_runtime_get(&dev->pdev->dev);
+ if (rets < 0 && rets != -EINPROGRESS) {
+ pm_runtime_put_noidle(&dev->pdev->dev);
+ cl_err(dev, cl, "rpm: get failed %d\n", rets);
+ return rets;
+ }
cb->fop_type = MEI_FOP_WRITE;
cb->buf_idx = 0;
@@ -926,6 +980,10 @@ out:
rets = buf->size;
err:
+ cl_dbg(dev, cl, "rpm: autosuspend\n");
+ pm_runtime_mark_last_busy(&dev->pdev->dev);
+ pm_runtime_put_autosuspend(&dev->pdev->dev);
+
return rets;
}