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Subject[char-misc-next 4/6] mei: hbm: add client dma hbm messages
Date
From: Alexander Usyskin <alexander.usyskin@intel.com>

Define structures for client DMA HBM protocol.
The protocol requires passing dma buffer address
and the buffer id.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
---
drivers/misc/mei/hw.h | 53 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 53 insertions(+)

diff --git a/drivers/misc/mei/hw.h b/drivers/misc/mei/hw.h
index 9577a2cc0733..b10606550613 100644
--- a/drivers/misc/mei/hw.h
+++ b/drivers/misc/mei/hw.h
@@ -142,6 +142,12 @@
#define MEI_HBM_CAPABILITIES_REQ_CMD 0x13
#define MEI_HBM_CAPABILITIES_RES_CMD 0x93

+#define MEI_HBM_CLIENT_DMA_MAP_REQ_CMD 0x14
+#define MEI_HBM_CLIENT_DMA_MAP_RES_CMD 0x94
+
+#define MEI_HBM_CLIENT_DMA_UNMAP_REQ_CMD 0x15
+#define MEI_HBM_CLIENT_DMA_UNMAP_RES_CMD 0x95
+
/*
* MEI Stop Reason
* used by hbm_host_stop_request.reason
@@ -679,4 +685,51 @@ struct hbm_capability_response {
u8 capability_granted[3];
} __packed;

+/**
+ * struct hbm_client_dma_map_request - client dma map request from host to fw
+ *
+ * @hbm_cmd: bus message command header
+ * @client_buffer_id: client buffer id
+ * @reserved: reserved
+ * @address_lsb: DMA address LSB
+ * @address_msb: DMA address MSB
+ * @size: DMA size
+ */
+struct hbm_client_dma_map_request {
+ u8 hbm_cmd;
+ u8 client_buffer_id;
+ u8 reserved[2];
+ u32 address_lsb;
+ u32 address_msb;
+ u32 size;
+} __packed;
+
+/**
+ * struct hbm_client_dma_unmap_request
+ * client dma unmap request from the host to the firmware
+ *
+ * @hbm_cmd: bus message command header
+ * @status: unmap status
+ * @client_buffer_id: client buffer id
+ * @reserved: reserved
+ */
+struct hbm_client_dma_unmap_request {
+ u8 hbm_cmd;
+ u8 status;
+ u8 client_buffer_id;
+ u8 reserved;
+} __packed;
+
+/**
+ * struct hbm_client_dma_response
+ * client dma unmap response from the firmware to the host
+ *
+ * @hbm_cmd: bus message command header
+ * @status: command status
+ */
+struct hbm_client_dma_response {
+ u8 hbm_cmd;
+ u8 status;
+} __packed;
+
#endif
--
2.26.2
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