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-rw-r--r--drivers/misc/mei/hbm.c41
-rw-r--r--drivers/misc/mei/hbm.h1
-rw-r--r--drivers/misc/mei/hw.h16
-rw-r--r--drivers/misc/mei/init.c1
-rw-r--r--drivers/misc/mei/mei_dev.h1
5 files changed, 60 insertions, 0 deletions
diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c
index 4960288e543a..a16b47c855aa 100644
--- a/drivers/misc/mei/hbm.c
+++ b/drivers/misc/mei/hbm.c
@@ -14,6 +14,7 @@
*
*/
+#include <linux/export.h>
#include <linux/pci.h>
#include <linux/sched.h>
#include <linux/wait.h>
@@ -289,6 +290,34 @@ static int mei_hbm_prop_req(struct mei_device *dev)
return 0;
}
+/*
+ * mei_hbm_pg - sends pg command
+ *
+ * @dev: the device structure
+ * @pg_cmd: the pg command code
+ *
+ * This function returns -EIO on write failure
+ */
+int mei_hbm_pg(struct mei_device *dev, u8 pg_cmd)
+{
+ struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
+ struct hbm_power_gate *req;
+ const size_t len = sizeof(struct hbm_power_gate);
+ int ret;
+
+ mei_hbm_hdr(mei_hdr, len);
+
+ req = (struct hbm_power_gate *)dev->wr_msg.data;
+ memset(req, 0, len);
+ req->hbm_cmd = pg_cmd;
+
+ ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data);
+ if (ret)
+ dev_err(&dev->pdev->dev, "power gate command write failed.\n");
+ return ret;
+}
+EXPORT_SYMBOL_GPL(mei_hbm_pg);
+
/**
* mei_hbm_stop_req - send stop request message
*
@@ -701,6 +730,18 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
mei_hbm_cl_flow_control_res(dev, flow_control);
break;
+ case MEI_PG_ISOLATION_ENTRY_RES_CMD:
+ dev_dbg(&dev->pdev->dev, "power gate isolation entry response received\n");
+ if (waitqueue_active(&dev->wait_pg))
+ wake_up(&dev->wait_pg);
+ break;
+
+ case MEI_PG_ISOLATION_EXIT_REQ_CMD:
+ dev_dbg(&dev->pdev->dev, "power gate isolation exit request received\n");
+ if (waitqueue_active(&dev->wait_pg))
+ wake_up(&dev->wait_pg);
+ break;
+
case HOST_CLIENT_PROPERTIES_RES_CMD:
dev_dbg(&dev->pdev->dev, "hbm: properties response: message received.\n");
diff --git a/drivers/misc/mei/hbm.h b/drivers/misc/mei/hbm.h
index 20e8782711c0..8e39cee408d0 100644
--- a/drivers/misc/mei/hbm.h
+++ b/drivers/misc/mei/hbm.h
@@ -57,6 +57,7 @@ int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl);
int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl);
int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl);
bool mei_hbm_version_is_supported(struct mei_device *dev);
+int mei_hbm_pg(struct mei_device *dev, u8 pg_cmd);
#endif /* _MEI_HBM_H_ */
diff --git a/drivers/misc/mei/hw.h b/drivers/misc/mei/hw.h
index 6b476ab49b2e..1d70968d90b6 100644
--- a/drivers/misc/mei/hw.h
+++ b/drivers/misc/mei/hw.h
@@ -69,6 +69,11 @@
#define MEI_FLOW_CONTROL_CMD 0x08
+#define MEI_PG_ISOLATION_ENTRY_REQ_CMD 0x0a
+#define MEI_PG_ISOLATION_ENTRY_RES_CMD 0x8a
+#define MEI_PG_ISOLATION_EXIT_REQ_CMD 0x0b
+#define MEI_PG_ISOLATION_EXIT_RES_CMD 0x8b
+
/*
* MEI Stop Reason
* used by hbm_host_stop_request.reason
@@ -208,6 +213,17 @@ struct hbm_props_response {
} __packed;
/**
+ * struct hbm_power_gate - power gate request/response
+ *
+ * @hbm_cmd - bus message command header
+ * @reserved[3]
+ */
+struct hbm_power_gate {
+ u8 hbm_cmd;
+ u8 reserved[3];
+} __packed;
+
+/**
* struct hbm_client_connect_request - connect/disconnect request
*
* @hbm_cmd - bus message command header
diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c
index 4460975c0eef..cc604e1d9457 100644
--- a/drivers/misc/mei/init.c
+++ b/drivers/misc/mei/init.c
@@ -312,6 +312,7 @@ void mei_device_init(struct mei_device *dev)
INIT_LIST_HEAD(&dev->device_list);
mutex_init(&dev->device_lock);
init_waitqueue_head(&dev->wait_hw_ready);
+ init_waitqueue_head(&dev->wait_pg);
init_waitqueue_head(&dev->wait_recvd_msg);
init_waitqueue_head(&dev->wait_stop_wd);
dev->dev_state = MEI_DEV_INITIALIZING;
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index 94a516716d22..4d4c041a7e4f 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -371,6 +371,7 @@ struct mei_device {
* waiting queue for receive message from FW
*/
wait_queue_head_t wait_hw_ready;
+ wait_queue_head_t wait_pg;
wait_queue_head_t wait_recvd_msg;
wait_queue_head_t wait_stop_wd;