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path: root/drivers/misc/mei/mei_dev.h
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Diffstat (limited to 'drivers/misc/mei/mei_dev.h')
-rw-r--r--drivers/misc/mei/mei_dev.h101
1 files changed, 100 insertions, 1 deletions
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index 94a516716d22..5c7e990e2f22 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -153,6 +153,20 @@ struct mei_msg_data {
unsigned char *data;
};
+/* Maximum number of processed FW status registers */
+#define MEI_FW_STATUS_MAX 2
+
+/*
+ * struct mei_fw_status - storage of FW status data
+ *
+ * @count - number of actually available elements in array
+ * @status - FW status registers
+ */
+struct mei_fw_status {
+ int count;
+ u32 status[MEI_FW_STATUS_MAX];
+};
+
/**
* struct mei_me_client - representation of me (fw) client
*
@@ -213,6 +227,7 @@ struct mei_cl {
/** struct mei_hw_ops
*
+ * @fw_status - read FW status from PCI config space
* @host_is_ready - query for host readiness
* @hw_is_ready - query if hw is ready
@@ -220,6 +235,9 @@ struct mei_cl {
* @hw_start - start hw after reset
* @hw_config - configure hw
+ * @pg_state - power gating state of the device
+ * @pg_is_enabled - is power gating enabled
+
* @intr_clear - clear pending interrupts
* @intr_enable - enable interrupts
* @intr_disable - disable interrupts
@@ -237,6 +255,8 @@ struct mei_cl {
*/
struct mei_hw_ops {
+ int (*fw_status)(struct mei_device *dev,
+ struct mei_fw_status *fw_status);
bool (*host_is_ready)(struct mei_device *dev);
bool (*hw_is_ready)(struct mei_device *dev);
@@ -244,6 +264,9 @@ struct mei_hw_ops {
int (*hw_start)(struct mei_device *dev);
void (*hw_config)(struct mei_device *dev);
+ enum mei_pg_state (*pg_state)(struct mei_device *dev);
+ bool (*pg_is_enabled)(struct mei_device *dev);
+
void (*intr_clear)(struct mei_device *dev);
void (*intr_enable)(struct mei_device *dev);
void (*intr_disable)(struct mei_device *dev);
@@ -331,16 +354,61 @@ struct mei_cl_device {
void *priv_data;
};
+
+ /**
+ * enum mei_pg_event - power gating transition events
+ *
+ * @MEI_PG_EVENT_IDLE: the driver is not in power gating transition
+ * @MEI_PG_EVENT_WAIT: the driver is waiting for a pg event to complete
+ * @MEI_PG_EVENT_RECEIVED: the driver received pg event
+ */
+enum mei_pg_event {
+ MEI_PG_EVENT_IDLE,
+ MEI_PG_EVENT_WAIT,
+ MEI_PG_EVENT_RECEIVED,
+};
+
+/**
+ * enum mei_pg_state - device internal power gating state
+ *
+ * @MEI_PG_OFF: device is not power gated - it is active
+ * @MEI_PG_ON: device is power gated - it is in lower power state
+ */
+enum mei_pg_state {
+ MEI_PG_OFF = 0,
+ MEI_PG_ON = 1,
+};
+
+/*
+ * mei_cfg
+ *
+ * @fw_status - FW status
+ * @quirk_probe - device exclusion quirk
+ */
+struct mei_cfg {
+ const struct mei_fw_status fw_status;
+ bool (*quirk_probe)(struct pci_dev *pdev);
+};
+
+
+#define MEI_PCI_DEVICE(dev, cfg) \
+ .vendor = PCI_VENDOR_ID_INTEL, .device = (dev), \
+ .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, \
+ .driver_data = (kernel_ulong_t)&(cfg)
+
+
/**
* struct mei_device - MEI private device struct
* @reset_count - limits the number of consecutive resets
* @hbm_state - state of host bus message protocol
+ * @pg_event - power gating event
* @mem_addr - mem mapped base register address
* @hbuf_depth - depth of hardware host/write buffer is slots
* @hbuf_is_ready - query if the host host/write buffer is ready
* @wr_msg - the buffer for hbm control messages
+ * @cfg - per device generation config and ops
*/
struct mei_device {
struct pci_dev *pdev; /* pointer to pci device struct */
@@ -371,6 +439,7 @@ 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;
@@ -382,6 +451,14 @@ struct mei_device {
enum mei_hbm_state hbm_state;
u16 init_clients_timer;
+ /*
+ * Power Gating support
+ */
+ enum mei_pg_event pg_event;
+#ifdef CONFIG_PM_RUNTIME
+ struct dev_pm_domain pg_domain;
+#endif /* CONFIG_PM_RUNTIME */
+
unsigned char rd_msg_buf[MEI_RD_MSG_BUF_SIZE]; /* control messages */
u32 rd_msg_hdr;
@@ -442,6 +519,7 @@ struct mei_device {
const struct mei_hw_ops *ops;
+ const struct mei_cfg *cfg;
char hw[0] __aligned(sizeof(void *));
};
@@ -474,7 +552,7 @@ static inline u32 mei_slots2data(int slots)
/*
* mei init function prototypes
*/
-void mei_device_init(struct mei_device *dev);
+void mei_device_init(struct mei_device *dev, const struct mei_cfg *cfg);
int mei_reset(struct mei_device *dev);
int mei_start(struct mei_device *dev);
int mei_restart(struct mei_device *dev);
@@ -553,10 +631,22 @@ void mei_watchdog_unregister(struct mei_device *dev);
* Register Access Function
*/
+
static inline void mei_hw_config(struct mei_device *dev)
{
dev->ops->hw_config(dev);
}
+
+static inline enum mei_pg_state mei_pg_state(struct mei_device *dev)
+{
+ return dev->ops->pg_state(dev);
+}
+
+static inline bool mei_pg_is_enabled(struct mei_device *dev)
+{
+ return dev->ops->pg_is_enabled(dev);
+}
+
static inline int mei_hw_reset(struct mei_device *dev, bool enable)
{
return dev->ops->hw_reset(dev, enable);
@@ -629,8 +719,17 @@ static inline int mei_count_full_read_slots(struct mei_device *dev)
return dev->ops->rdbuf_full_slots(dev);
}
+int mei_fw_status(struct mei_device *dev, struct mei_fw_status *fw_status);
+
+#define FW_STS_FMT "%08X %08X"
+#define FW_STS_PRM(fw_status) \
+ (fw_status).count > 0 ? (fw_status).status[0] : 0xDEADBEEF, \
+ (fw_status).count > 1 ? (fw_status).status[1] : 0xDEADBEEF
+
bool mei_hbuf_acquire(struct mei_device *dev);
+bool mei_write_is_idle(struct mei_device *dev);
+
#if IS_ENABLED(CONFIG_DEBUG_FS)
int mei_dbgfs_register(struct mei_device *dev, const char *name);
void mei_dbgfs_deregister(struct mei_device *dev);