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-rw-r--r--drivers/misc/mei/debugfs.c1
-rw-r--r--drivers/misc/mei/hbm.c72
-rw-r--r--drivers/misc/mei/hbm.h2
-rw-r--r--drivers/misc/mei/hw.h31
-rw-r--r--drivers/misc/mei/mei_dev.h2
5 files changed, 108 insertions, 0 deletions
diff --git a/drivers/misc/mei/debugfs.c b/drivers/misc/mei/debugfs.c
index a26c716c61a1..72ee572ad9b4 100644
--- a/drivers/misc/mei/debugfs.c
+++ b/drivers/misc/mei/debugfs.c
@@ -103,6 +103,7 @@ static int mei_dbgfs_devstate_show(struct seq_file *m, void *unused)
seq_printf(m, "\tFA: %01d\n", dev->hbm_f_fa_supported);
seq_printf(m, "\tOS: %01d\n", dev->hbm_f_os_supported);
seq_printf(m, "\tDR: %01d\n", dev->hbm_f_dr_supported);
+ seq_printf(m, "\tCAP: %01d\n", dev->hbm_f_cap_supported);
}
seq_printf(m, "pg: %s, %s\n",
diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c
index 308caee86920..3a227d9363d5 100644
--- a/drivers/misc/mei/hbm.c
+++ b/drivers/misc/mei/hbm.c
@@ -326,6 +326,37 @@ static int mei_hbm_dma_setup_req(struct mei_device *dev)
}
/**
+ * mei_hbm_capabilities_req - request capabilities
+ *
+ * @dev: the device structure
+ *
+ * Return: 0 on success and < 0 on failure
+ */
+static int mei_hbm_capabilities_req(struct mei_device *dev)
+{
+ struct mei_msg_hdr mei_hdr;
+ struct hbm_capability_request req;
+ int ret;
+
+ mei_hbm_hdr(&mei_hdr, sizeof(req));
+
+ memset(&req, 0, sizeof(req));
+ req.hbm_cmd = MEI_HBM_CAPABILITIES_REQ_CMD;
+
+ ret = mei_hbm_write_message(dev, &mei_hdr, &req);
+ if (ret) {
+ dev_err(dev->dev,
+ "capabilities request write failed: ret = %d.\n", ret);
+ return ret;
+ }
+
+ dev->hbm_state = MEI_HBM_CAP_SETUP;
+ dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
+ mei_schedule_stall_timer(dev);
+ return 0;
+}
+
+/**
* mei_hbm_enum_clients_req - sends enumeration client request message.
*
* @dev: the device structure
@@ -1042,6 +1073,12 @@ static void mei_hbm_config_features(struct mei_device *dev)
(dev->version.major_version == HBM_MAJOR_VERSION_DR &&
dev->version.minor_version >= HBM_MINOR_VERSION_DR))
dev->hbm_f_dr_supported = 1;
+
+ dev->hbm_f_cap_supported = 0;
+ if (dev->version.major_version > HBM_MAJOR_VERSION_CAP ||
+ (dev->version.major_version == HBM_MAJOR_VERSION_CAP &&
+ dev->version.minor_version >= HBM_MINOR_VERSION_CAP))
+ dev->hbm_f_cap_supported = 1;
}
/**
@@ -1138,6 +1175,13 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
return -EPROTO;
}
+ if (dev->hbm_f_cap_supported) {
+ if (mei_hbm_capabilities_req(dev))
+ return -EIO;
+ wake_up(&dev->wait_hbm_start);
+ break;
+ }
+
if (dev->hbm_f_dr_supported) {
if (mei_dmam_ring_alloc(dev))
dev_info(dev->dev, "running w/o dma ring\n");
@@ -1159,6 +1203,34 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
wake_up(&dev->wait_hbm_start);
break;
+ case MEI_HBM_CAPABILITIES_RES_CMD:
+ dev_dbg(dev->dev, "hbm: capabilities response: message received.\n");
+
+ dev->init_clients_timer = 0;
+
+ if (dev->hbm_state != MEI_HBM_CAP_SETUP) {
+ dev_err(dev->dev, "hbm: capabilities response: state mismatch, [%d, %d]\n",
+ dev->dev_state, dev->hbm_state);
+ return -EPROTO;
+ }
+
+ if (dev->hbm_f_dr_supported) {
+ if (mei_dmam_ring_alloc(dev))
+ dev_info(dev->dev, "running w/o dma ring\n");
+ if (mei_dma_ring_is_allocated(dev)) {
+ if (mei_hbm_dma_setup_req(dev))
+ return -EIO;
+ break;
+ }
+ }
+
+ dev->hbm_f_dr_supported = 0;
+ mei_dmam_ring_free(dev);
+
+ if (mei_hbm_enum_clients_req(dev))
+ return -EIO;
+ break;
+
case MEI_HBM_DMA_SETUP_RES_CMD:
dev_dbg(dev->dev, "hbm: dma setup response: message received.\n");
diff --git a/drivers/misc/mei/hbm.h b/drivers/misc/mei/hbm.h
index 5aa58cffdd2e..4d95e38e4ddf 100644
--- a/drivers/misc/mei/hbm.h
+++ b/drivers/misc/mei/hbm.h
@@ -16,6 +16,7 @@ struct mei_cl;
*
* @MEI_HBM_IDLE : protocol not started
* @MEI_HBM_STARTING : start request message was sent
+ * @MEI_HBM_CAP_SETUP : capabilities request message was sent
* @MEI_HBM_DR_SETUP : dma ring setup request message was sent
* @MEI_HBM_ENUM_CLIENTS : enumeration request was sent
* @MEI_HBM_CLIENT_PROPERTIES : acquiring clients properties
@@ -25,6 +26,7 @@ struct mei_cl;
enum mei_hbm_state {
MEI_HBM_IDLE = 0,
MEI_HBM_STARTING,
+ MEI_HBM_CAP_SETUP,
MEI_HBM_DR_SETUP,
MEI_HBM_ENUM_CLIENTS,
MEI_HBM_CLIENT_PROPERTIES,
diff --git a/drivers/misc/mei/hw.h b/drivers/misc/mei/hw.h
index 26fa92cb7f7a..539d89ba1c61 100644
--- a/drivers/misc/mei/hw.h
+++ b/drivers/misc/mei/hw.h
@@ -76,6 +76,12 @@
#define HBM_MINOR_VERSION_DR 1
#define HBM_MAJOR_VERSION_DR 2
+/*
+ * MEI version with capabilities message support
+ */
+#define HBM_MINOR_VERSION_CAP 2
+#define HBM_MAJOR_VERSION_CAP 2
+
/* Host bus message command opcode */
#define MEI_HBM_CMD_OP_MSK 0x7f
/* Host bus message command RESPONSE */
@@ -121,6 +127,9 @@
#define MEI_HBM_DMA_SETUP_REQ_CMD 0x12
#define MEI_HBM_DMA_SETUP_RES_CMD 0x92
+#define MEI_HBM_CAPABILITIES_REQ_CMD 0x13
+#define MEI_HBM_CAPABILITIES_RES_CMD 0x93
+
/*
* MEI Stop Reason
* used by hbm_host_stop_request.reason
@@ -533,4 +542,26 @@ struct hbm_dma_ring_ctrl {
u32 reserved4;
} __packed;
+/**
+ * struct hbm_capability_request - capability request from host to fw
+ *
+ * @hbm_cmd : bus message command header
+ * @capability_requested: bitmask of capabilities requested by host
+ */
+struct hbm_capability_request {
+ u8 hbm_cmd;
+ u8 capability_requested[3];
+} __packed;
+
+/**
+ * struct hbm_capability_response - capability response from fw to host
+ *
+ * @hbm_cmd : bus message command header
+ * @capability_granted: bitmask of capabilities granted by FW
+ */
+struct hbm_capability_response {
+ u8 hbm_cmd;
+ u8 capability_granted[3];
+} __packed;
+
#endif
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index d3a4f54c0ae7..e18af7dfd9ff 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -426,6 +426,7 @@ struct mei_fw_version {
* @hbm_f_ie_supported : hbm feature immediate reply to enum request
* @hbm_f_os_supported : hbm feature support OS ver message
* @hbm_f_dr_supported : hbm feature dma ring supported
+ * @hbm_f_cap_supported : hbm feature capabilities message supported
*
* @fw_ver : FW versions
*
@@ -510,6 +511,7 @@ struct mei_device {
unsigned int hbm_f_ie_supported:1;
unsigned int hbm_f_os_supported:1;
unsigned int hbm_f_dr_supported:1;
+ unsigned int hbm_f_cap_supported:1;
struct mei_fw_version fw_ver[MEI_MAX_FW_VER_BLOCKS];
generated by cgit v1.2.3 (git 2.39.0) at 2025-02-24 17:44:01 +0300