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path: root/drivers/misc/mei/hbm.c
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Diffstat (limited to 'drivers/misc/mei/hbm.c')
-rw-r--r--drivers/misc/mei/hbm.c165
1 files changed, 161 insertions, 4 deletions
diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c
index 686e8b6a4c55..d0277c7fed10 100644
--- a/drivers/misc/mei/hbm.c
+++ b/drivers/misc/mei/hbm.c
@@ -339,7 +339,9 @@ static int mei_hbm_capabilities_req(struct mei_device *dev)
memset(&req, 0, sizeof(req));
req.hbm_cmd = MEI_HBM_CAPABILITIES_REQ_CMD;
if (dev->hbm_f_vt_supported)
- req.capability_requested[0] = HBM_CAP_VT;
+ req.capability_requested[0] |= HBM_CAP_VT;
+ if (dev->hbm_f_cd_supported)
+ req.capability_requested[0] |= HBM_CAP_CD;
ret = mei_hbm_write_message(dev, &mei_hdr, &req);
if (ret) {
@@ -593,6 +595,117 @@ static void mei_hbm_cl_notify(struct mei_device *dev,
}
/**
+ * mei_hbm_cl_dma_map_req - send client dma map request
+ *
+ * @dev: the device structure
+ * @cl: mei host client
+ *
+ * Return: 0 on success and -EIO on write failure
+ */
+int mei_hbm_cl_dma_map_req(struct mei_device *dev, struct mei_cl *cl)
+{
+ struct mei_msg_hdr mei_hdr;
+ struct hbm_client_dma_map_request req;
+ int ret;
+
+ mei_hbm_hdr(&mei_hdr, sizeof(req));
+
+ memset(&req, 0, sizeof(req));
+
+ req.hbm_cmd = MEI_HBM_CLIENT_DMA_MAP_REQ_CMD;
+ req.client_buffer_id = cl->dma.buffer_id;
+ req.address_lsb = lower_32_bits(cl->dma.daddr);
+ req.address_msb = upper_32_bits(cl->dma.daddr);
+ req.size = cl->dma.size;
+
+ ret = mei_hbm_write_message(dev, &mei_hdr, &req);
+ if (ret)
+ dev_err(dev->dev, "dma map request failed: ret = %d\n", ret);
+
+ return ret;
+}
+
+/**
+ * mei_hbm_cl_dma_unmap_req - send client dma unmap request
+ *
+ * @dev: the device structure
+ * @cl: mei host client
+ *
+ * Return: 0 on success and -EIO on write failure
+ */
+int mei_hbm_cl_dma_unmap_req(struct mei_device *dev, struct mei_cl *cl)
+{
+ struct mei_msg_hdr mei_hdr;
+ struct hbm_client_dma_unmap_request req;
+ int ret;
+
+ mei_hbm_hdr(&mei_hdr, sizeof(req));
+
+ memset(&req, 0, sizeof(req));
+
+ req.hbm_cmd = MEI_HBM_CLIENT_DMA_UNMAP_REQ_CMD;
+ req.client_buffer_id = cl->dma.buffer_id;
+
+ ret = mei_hbm_write_message(dev, &mei_hdr, &req);
+ if (ret)
+ dev_err(dev->dev, "dma unmap request failed: ret = %d\n", ret);
+
+ return ret;
+}
+
+static void mei_hbm_cl_dma_map_res(struct mei_device *dev,
+ struct hbm_client_dma_response *res)
+{
+ struct mei_cl *cl;
+ struct mei_cl_cb *cb, *next;
+
+ cl = NULL;
+ list_for_each_entry_safe(cb, next, &dev->ctrl_rd_list, list) {
+ if (cb->fop_type != MEI_FOP_DMA_MAP)
+ continue;
+ if (!cb->cl->dma.buffer_id || cb->cl->dma_mapped)
+ continue;
+
+ cl = cb->cl;
+ break;
+ }
+ if (!cl)
+ return;
+
+ dev_dbg(dev->dev, "cl dma map result = %d\n", res->status);
+ cl->status = res->status;
+ if (!cl->status)
+ cl->dma_mapped = 1;
+ wake_up(&cl->wait);
+}
+
+static void mei_hbm_cl_dma_unmap_res(struct mei_device *dev,
+ struct hbm_client_dma_response *res)
+{
+ struct mei_cl *cl;
+ struct mei_cl_cb *cb, *next;
+
+ cl = NULL;
+ list_for_each_entry_safe(cb, next, &dev->ctrl_rd_list, list) {
+ if (cb->fop_type != MEI_FOP_DMA_UNMAP)
+ continue;
+ if (!cb->cl->dma.buffer_id || !cb->cl->dma_mapped)
+ continue;
+
+ cl = cb->cl;
+ break;
+ }
+ if (!cl)
+ return;
+
+ dev_dbg(dev->dev, "cl dma unmap result = %d\n", res->status);
+ cl->status = res->status;
+ if (!cl->status)
+ cl->dma_mapped = 0;
+ wake_up(&cl->wait);
+}
+
+/**
* mei_hbm_prop_req - request property for a single client
*
* @dev: the device structure
@@ -1085,6 +1198,13 @@ static void mei_hbm_config_features(struct mei_device *dev)
(dev->version.major_version == HBM_MAJOR_VERSION_CAP &&
dev->version.minor_version >= HBM_MINOR_VERSION_CAP))
dev->hbm_f_cap_supported = 1;
+
+ /* Client DMA Support */
+ dev->hbm_f_cd_supported = 0;
+ if (dev->version.major_version > HBM_MAJOR_VERSION_CD ||
+ (dev->version.major_version == HBM_MAJOR_VERSION_CD &&
+ dev->version.minor_version >= HBM_MINOR_VERSION_CD))
+ dev->hbm_f_cd_supported = 1;
}
/**
@@ -1124,6 +1244,7 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
struct mei_hbm_cl_cmd *cl_cmd;
struct hbm_client_connect_request *disconnect_req;
struct hbm_flow_control *fctrl;
+ struct hbm_client_dma_response *client_dma_res;
/* read the message to our buffer */
BUG_ON(hdr->length >= sizeof(dev->rd_msg_buf));
@@ -1177,6 +1298,10 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
dev->hbm_state != MEI_HBM_STARTING) {
+ if (dev->dev_state == MEI_DEV_POWER_DOWN) {
+ dev_dbg(dev->dev, "hbm: start: on shutdown, ignoring\n");
+ return 0;
+ }
dev_err(dev->dev, "hbm: start: state mismatch, [%d, %d]\n",
dev->dev_state, dev->hbm_state);
return -EPROTO;
@@ -1215,7 +1340,12 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
dev->init_clients_timer = 0;
- if (dev->hbm_state != MEI_HBM_CAP_SETUP) {
+ if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
+ dev->hbm_state != MEI_HBM_CAP_SETUP) {
+ if (dev->dev_state == MEI_DEV_POWER_DOWN) {
+ dev_dbg(dev->dev, "hbm: capabilities response: on shutdown, ignoring\n");
+ return 0;
+ }
dev_err(dev->dev, "hbm: capabilities response: state mismatch, [%d, %d]\n",
dev->dev_state, dev->hbm_state);
return -EPROTO;
@@ -1224,6 +1354,8 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
capability_res = (struct hbm_capability_response *)mei_msg;
if (!(capability_res->capability_granted[0] & HBM_CAP_VT))
dev->hbm_f_vt_supported = 0;
+ if (!(capability_res->capability_granted[0] & HBM_CAP_CD))
+ dev->hbm_f_cd_supported = 0;
if (dev->hbm_f_dr_supported) {
if (mei_dmam_ring_alloc(dev))
@@ -1247,7 +1379,12 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
dev->init_clients_timer = 0;
- if (dev->hbm_state != MEI_HBM_DR_SETUP) {
+ if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
+ dev->hbm_state != MEI_HBM_DR_SETUP) {
+ if (dev->dev_state == MEI_DEV_POWER_DOWN) {
+ dev_dbg(dev->dev, "hbm: dma setup response: on shutdown, ignoring\n");
+ return 0;
+ }
dev_err(dev->dev, "hbm: dma setup response: state mismatch, [%d, %d]\n",
dev->dev_state, dev->hbm_state);
return -EPROTO;
@@ -1311,6 +1448,10 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
dev->hbm_state != MEI_HBM_CLIENT_PROPERTIES) {
+ if (dev->dev_state == MEI_DEV_POWER_DOWN) {
+ dev_dbg(dev->dev, "hbm: properties response: on shutdown, ignoring\n");
+ return 0;
+ }
dev_err(dev->dev, "hbm: properties response: state mismatch, [%d, %d]\n",
dev->dev_state, dev->hbm_state);
return -EPROTO;
@@ -1349,6 +1490,10 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
dev->hbm_state != MEI_HBM_ENUM_CLIENTS) {
+ if (dev->dev_state == MEI_DEV_POWER_DOWN) {
+ dev_dbg(dev->dev, "hbm: enumeration response: on shutdown, ignoring\n");
+ return 0;
+ }
dev_err(dev->dev, "hbm: enumeration response: state mismatch, [%d, %d]\n",
dev->dev_state, dev->hbm_state);
return -EPROTO;
@@ -1373,7 +1518,7 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
return -EPROTO;
}
- dev->dev_state = MEI_DEV_POWER_DOWN;
+ mei_set_devstate(dev, MEI_DEV_POWER_DOWN);
dev_info(dev->dev, "hbm: stop response: resetting.\n");
/* force the reset */
return -EPROTO;
@@ -1426,6 +1571,18 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
mei_hbm_cl_notify(dev, cl_cmd);
break;
+ case MEI_HBM_CLIENT_DMA_MAP_RES_CMD:
+ dev_dbg(dev->dev, "hbm: client dma map response: message received.\n");
+ client_dma_res = (struct hbm_client_dma_response *)mei_msg;
+ mei_hbm_cl_dma_map_res(dev, client_dma_res);
+ break;
+
+ case MEI_HBM_CLIENT_DMA_UNMAP_RES_CMD:
+ dev_dbg(dev->dev, "hbm: client dma unmap response: message received.\n");
+ client_dma_res = (struct hbm_client_dma_response *)mei_msg;
+ mei_hbm_cl_dma_unmap_res(dev, client_dma_res);
+ break;
+
default:
WARN(1, "hbm: wrong command %d\n", mei_msg->hbm_cmd);
return -EPROTO;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.