diff options
| -rw-r--r-- | drivers/misc/mei/hbm.c | 41 | ||||
| -rw-r--r-- | drivers/misc/mei/hbm.h | 1 | ||||
| -rw-r--r-- | drivers/misc/mei/hw.h | 16 | ||||
| -rw-r--r-- | drivers/misc/mei/init.c | 1 | ||||
| -rw-r--r-- | drivers/misc/mei/mei_dev.h | 1 |
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; |