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- // SPDX-License-Identifier: GPL-2.0
- /*
- * Copyright (c) 2003-2022, Intel Corporation. All rights reserved.
- * Intel Management Engine Interface (Intel MEI) Linux driver
- */
- #include <linux/export.h>
- #include <linux/sched.h>
- #include <linux/wait.h>
- #include <linux/pm_runtime.h>
- #include <linux/slab.h>
- #include <linux/mei.h>
- #include "mei_dev.h"
- #include "hbm.h"
- #include "client.h"
- static const char *mei_hbm_status_str(enum mei_hbm_status status)
- {
- #define MEI_HBM_STATUS(status) case MEI_HBMS_##status: return #status
- switch (status) {
- MEI_HBM_STATUS(SUCCESS);
- MEI_HBM_STATUS(CLIENT_NOT_FOUND);
- MEI_HBM_STATUS(ALREADY_EXISTS);
- MEI_HBM_STATUS(REJECTED);
- MEI_HBM_STATUS(INVALID_PARAMETER);
- MEI_HBM_STATUS(NOT_ALLOWED);
- MEI_HBM_STATUS(ALREADY_STARTED);
- MEI_HBM_STATUS(NOT_STARTED);
- default: return "unknown";
- }
- #undef MEI_HBM_STATUS
- };
- static const char *mei_cl_conn_status_str(enum mei_cl_connect_status status)
- {
- #define MEI_CL_CS(status) case MEI_CL_CONN_##status: return #status
- switch (status) {
- MEI_CL_CS(SUCCESS);
- MEI_CL_CS(NOT_FOUND);
- MEI_CL_CS(ALREADY_STARTED);
- MEI_CL_CS(OUT_OF_RESOURCES);
- MEI_CL_CS(MESSAGE_SMALL);
- MEI_CL_CS(NOT_ALLOWED);
- default: return "unknown";
- }
- #undef MEI_CL_CCS
- }
- const char *mei_hbm_state_str(enum mei_hbm_state state)
- {
- #define MEI_HBM_STATE(state) case MEI_HBM_##state: return #state
- switch (state) {
- MEI_HBM_STATE(IDLE);
- MEI_HBM_STATE(STARTING);
- MEI_HBM_STATE(STARTED);
- MEI_HBM_STATE(DR_SETUP);
- MEI_HBM_STATE(ENUM_CLIENTS);
- MEI_HBM_STATE(CLIENT_PROPERTIES);
- MEI_HBM_STATE(STOPPED);
- default:
- return "unknown";
- }
- #undef MEI_HBM_STATE
- }
- /**
- * mei_cl_conn_status_to_errno - convert client connect response
- * status to error code
- *
- * @status: client connect response status
- *
- * Return: corresponding error code
- */
- static int mei_cl_conn_status_to_errno(enum mei_cl_connect_status status)
- {
- switch (status) {
- case MEI_CL_CONN_SUCCESS: return 0;
- case MEI_CL_CONN_NOT_FOUND: return -ENOTTY;
- case MEI_CL_CONN_ALREADY_STARTED: return -EBUSY;
- case MEI_CL_CONN_OUT_OF_RESOURCES: return -EBUSY;
- case MEI_CL_CONN_MESSAGE_SMALL: return -EINVAL;
- case MEI_CL_CONN_NOT_ALLOWED: return -EBUSY;
- default: return -EINVAL;
- }
- }
- /**
- * mei_hbm_write_message - wrapper for sending hbm messages.
- *
- * @dev: mei device
- * @hdr: mei header
- * @data: payload
- */
- static inline int mei_hbm_write_message(struct mei_device *dev,
- struct mei_msg_hdr *hdr,
- const void *data)
- {
- return mei_write_message(dev, hdr, sizeof(*hdr), data, hdr->length);
- }
- /**
- * mei_hbm_idle - set hbm to idle state
- *
- * @dev: the device structure
- */
- void mei_hbm_idle(struct mei_device *dev)
- {
- dev->init_clients_timer = 0;
- dev->hbm_state = MEI_HBM_IDLE;
- }
- /**
- * mei_hbm_reset - reset hbm counters and book keeping data structurs
- *
- * @dev: the device structure
- */
- void mei_hbm_reset(struct mei_device *dev)
- {
- mei_me_cl_rm_all(dev);
- mei_hbm_idle(dev);
- }
- /**
- * mei_hbm_hdr - construct hbm header
- *
- * @mei_hdr: hbm header
- * @length: payload length
- */
- static inline void mei_hbm_hdr(struct mei_msg_hdr *mei_hdr, size_t length)
- {
- memset(mei_hdr, 0, sizeof(*mei_hdr));
- mei_hdr->length = length;
- mei_hdr->msg_complete = 1;
- }
- /**
- * mei_hbm_cl_hdr - construct client hbm header
- *
- * @cl: client
- * @hbm_cmd: host bus message command
- * @buf: buffer for cl header
- * @len: buffer length
- */
- static inline
- void mei_hbm_cl_hdr(struct mei_cl *cl, u8 hbm_cmd, void *buf, size_t len)
- {
- struct mei_hbm_cl_cmd *cmd = buf;
- memset(cmd, 0, len);
- cmd->hbm_cmd = hbm_cmd;
- cmd->host_addr = mei_cl_host_addr(cl);
- cmd->me_addr = mei_cl_me_id(cl);
- }
- /**
- * mei_hbm_cl_write - write simple hbm client message
- *
- * @dev: the device structure
- * @cl: client
- * @hbm_cmd: host bus message command
- * @buf: message buffer
- * @len: buffer length
- *
- * Return: 0 on success, <0 on failure.
- */
- static inline int mei_hbm_cl_write(struct mei_device *dev, struct mei_cl *cl,
- u8 hbm_cmd, void *buf, size_t len)
- {
- struct mei_msg_hdr mei_hdr;
- mei_hbm_hdr(&mei_hdr, len);
- mei_hbm_cl_hdr(cl, hbm_cmd, buf, len);
- return mei_hbm_write_message(dev, &mei_hdr, buf);
- }
- /**
- * mei_hbm_cl_addr_equal - check if the client's and
- * the message address match
- *
- * @cl: client
- * @cmd: hbm client message
- *
- * Return: true if addresses are the same
- */
- static inline
- bool mei_hbm_cl_addr_equal(struct mei_cl *cl, struct mei_hbm_cl_cmd *cmd)
- {
- return mei_cl_host_addr(cl) == cmd->host_addr &&
- mei_cl_me_id(cl) == cmd->me_addr;
- }
- /**
- * mei_hbm_cl_find_by_cmd - find recipient client
- *
- * @dev: the device structure
- * @buf: a buffer with hbm cl command
- *
- * Return: the recipient client or NULL if not found
- */
- static inline
- struct mei_cl *mei_hbm_cl_find_by_cmd(struct mei_device *dev, void *buf)
- {
- struct mei_hbm_cl_cmd *cmd = (struct mei_hbm_cl_cmd *)buf;
- struct mei_cl *cl;
- list_for_each_entry(cl, &dev->file_list, link)
- if (mei_hbm_cl_addr_equal(cl, cmd))
- return cl;
- return NULL;
- }
- /**
- * mei_hbm_start_wait - wait for start response message.
- *
- * @dev: the device structure
- *
- * Return: 0 on success and < 0 on failure
- */
- int mei_hbm_start_wait(struct mei_device *dev)
- {
- int ret;
- if (dev->hbm_state > MEI_HBM_STARTING)
- return 0;
- mutex_unlock(&dev->device_lock);
- ret = wait_event_timeout(dev->wait_hbm_start,
- dev->hbm_state != MEI_HBM_STARTING,
- dev->timeouts.hbm);
- mutex_lock(&dev->device_lock);
- if (ret == 0 && (dev->hbm_state <= MEI_HBM_STARTING)) {
- dev->hbm_state = MEI_HBM_IDLE;
- dev_err(dev->dev, "waiting for mei start failed\n");
- return -ETIME;
- }
- return 0;
- }
- /**
- * mei_hbm_start_req - sends start request message.
- *
- * @dev: the device structure
- *
- * Return: 0 on success and < 0 on failure
- */
- int mei_hbm_start_req(struct mei_device *dev)
- {
- struct mei_msg_hdr mei_hdr;
- struct hbm_host_version_request req;
- int ret;
- mei_hbm_reset(dev);
- mei_hbm_hdr(&mei_hdr, sizeof(req));
- /* host start message */
- memset(&req, 0, sizeof(req));
- req.hbm_cmd = HOST_START_REQ_CMD;
- req.host_version.major_version = HBM_MAJOR_VERSION;
- req.host_version.minor_version = HBM_MINOR_VERSION;
- dev->hbm_state = MEI_HBM_IDLE;
- ret = mei_hbm_write_message(dev, &mei_hdr, &req);
- if (ret) {
- dev_err(dev->dev, "version message write failed: ret = %d\n",
- ret);
- return ret;
- }
- dev->hbm_state = MEI_HBM_STARTING;
- dev->init_clients_timer = dev->timeouts.client_init;
- mei_schedule_stall_timer(dev);
- return 0;
- }
- /**
- * mei_hbm_dma_setup_req() - setup DMA request
- * @dev: the device structure
- *
- * Return: 0 on success and < 0 on failure
- */
- static int mei_hbm_dma_setup_req(struct mei_device *dev)
- {
- struct mei_msg_hdr mei_hdr;
- struct hbm_dma_setup_request req;
- unsigned int i;
- int ret;
- mei_hbm_hdr(&mei_hdr, sizeof(req));
- memset(&req, 0, sizeof(req));
- req.hbm_cmd = MEI_HBM_DMA_SETUP_REQ_CMD;
- for (i = 0; i < DMA_DSCR_NUM; i++) {
- phys_addr_t paddr;
- paddr = dev->dr_dscr[i].daddr;
- req.dma_dscr[i].addr_hi = upper_32_bits(paddr);
- req.dma_dscr[i].addr_lo = lower_32_bits(paddr);
- req.dma_dscr[i].size = dev->dr_dscr[i].size;
- }
- mei_dma_ring_reset(dev);
- ret = mei_hbm_write_message(dev, &mei_hdr, &req);
- if (ret) {
- dev_err(dev->dev, "dma setup request write failed: ret = %d.\n",
- ret);
- return ret;
- }
- dev->hbm_state = MEI_HBM_DR_SETUP;
- dev->init_clients_timer = dev->timeouts.client_init;
- mei_schedule_stall_timer(dev);
- return 0;
- }
- /**
- * 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;
- if (dev->hbm_f_vt_supported)
- 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) {
- 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 = dev->timeouts.client_init;
- mei_schedule_stall_timer(dev);
- return 0;
- }
- /**
- * mei_hbm_enum_clients_req - sends enumeration client request message.
- *
- * @dev: the device structure
- *
- * Return: 0 on success and < 0 on failure
- */
- static int mei_hbm_enum_clients_req(struct mei_device *dev)
- {
- struct mei_msg_hdr mei_hdr;
- struct hbm_host_enum_request req;
- int ret;
- /* enumerate clients */
- mei_hbm_hdr(&mei_hdr, sizeof(req));
- memset(&req, 0, sizeof(req));
- req.hbm_cmd = HOST_ENUM_REQ_CMD;
- req.flags |= dev->hbm_f_dc_supported ? MEI_HBM_ENUM_F_ALLOW_ADD : 0;
- req.flags |= dev->hbm_f_ie_supported ?
- MEI_HBM_ENUM_F_IMMEDIATE_ENUM : 0;
- ret = mei_hbm_write_message(dev, &mei_hdr, &req);
- if (ret) {
- dev_err(dev->dev, "enumeration request write failed: ret = %d.\n",
- ret);
- return ret;
- }
- dev->hbm_state = MEI_HBM_ENUM_CLIENTS;
- dev->init_clients_timer = dev->timeouts.client_init;
- mei_schedule_stall_timer(dev);
- return 0;
- }
- /**
- * mei_hbm_me_cl_add - add new me client to the list
- *
- * @dev: the device structure
- * @res: hbm property response
- *
- * Return: 0 on success and -ENOMEM on allocation failure
- */
- static int mei_hbm_me_cl_add(struct mei_device *dev,
- struct hbm_props_response *res)
- {
- struct mei_me_client *me_cl;
- const uuid_le *uuid = &res->client_properties.protocol_name;
- mei_me_cl_rm_by_uuid(dev, uuid);
- me_cl = kzalloc(sizeof(*me_cl), GFP_KERNEL);
- if (!me_cl)
- return -ENOMEM;
- mei_me_cl_init(me_cl);
- me_cl->props = res->client_properties;
- me_cl->client_id = res->me_addr;
- me_cl->tx_flow_ctrl_creds = 0;
- mei_me_cl_add(dev, me_cl);
- return 0;
- }
- /**
- * mei_hbm_add_cl_resp - send response to fw on client add request
- *
- * @dev: the device structure
- * @addr: me address
- * @status: response status
- *
- * Return: 0 on success and < 0 on failure
- */
- static int mei_hbm_add_cl_resp(struct mei_device *dev, u8 addr, u8 status)
- {
- struct mei_msg_hdr mei_hdr;
- struct hbm_add_client_response resp;
- int ret;
- dev_dbg(dev->dev, "adding client response\n");
- mei_hbm_hdr(&mei_hdr, sizeof(resp));
- memset(&resp, 0, sizeof(resp));
- resp.hbm_cmd = MEI_HBM_ADD_CLIENT_RES_CMD;
- resp.me_addr = addr;
- resp.status = status;
- ret = mei_hbm_write_message(dev, &mei_hdr, &resp);
- if (ret)
- dev_err(dev->dev, "add client response write failed: ret = %d\n",
- ret);
- return ret;
- }
- /**
- * mei_hbm_fw_add_cl_req - request from the fw to add a client
- *
- * @dev: the device structure
- * @req: add client request
- *
- * Return: 0 on success and < 0 on failure
- */
- static int mei_hbm_fw_add_cl_req(struct mei_device *dev,
- struct hbm_add_client_request *req)
- {
- int ret;
- u8 status = MEI_HBMS_SUCCESS;
- BUILD_BUG_ON(sizeof(struct hbm_add_client_request) !=
- sizeof(struct hbm_props_response));
- ret = mei_hbm_me_cl_add(dev, (struct hbm_props_response *)req);
- if (ret)
- status = !MEI_HBMS_SUCCESS;
- if (dev->dev_state == MEI_DEV_ENABLED)
- schedule_work(&dev->bus_rescan_work);
- return mei_hbm_add_cl_resp(dev, req->me_addr, status);
- }
- /**
- * mei_hbm_cl_notify_req - send notification request
- *
- * @dev: the device structure
- * @cl: a client to disconnect from
- * @start: true for start false for stop
- *
- * Return: 0 on success and -EIO on write failure
- */
- int mei_hbm_cl_notify_req(struct mei_device *dev,
- struct mei_cl *cl, u8 start)
- {
- struct mei_msg_hdr mei_hdr;
- struct hbm_notification_request req;
- int ret;
- mei_hbm_hdr(&mei_hdr, sizeof(req));
- mei_hbm_cl_hdr(cl, MEI_HBM_NOTIFY_REQ_CMD, &req, sizeof(req));
- req.start = start;
- ret = mei_hbm_write_message(dev, &mei_hdr, &req);
- if (ret)
- dev_err(dev->dev, "notify request failed: ret = %d\n", ret);
- return ret;
- }
- /**
- * notify_res_to_fop - convert notification response to the proper
- * notification FOP
- *
- * @cmd: client notification start response command
- *
- * Return: MEI_FOP_NOTIFY_START or MEI_FOP_NOTIFY_STOP;
- */
- static inline enum mei_cb_file_ops notify_res_to_fop(struct mei_hbm_cl_cmd *cmd)
- {
- struct hbm_notification_response *rs =
- (struct hbm_notification_response *)cmd;
- return mei_cl_notify_req2fop(rs->start);
- }
- /**
- * mei_hbm_cl_notify_start_res - update the client state according
- * notify start response
- *
- * @dev: the device structure
- * @cl: mei host client
- * @cmd: client notification start response command
- */
- static void mei_hbm_cl_notify_start_res(struct mei_device *dev,
- struct mei_cl *cl,
- struct mei_hbm_cl_cmd *cmd)
- {
- struct hbm_notification_response *rs =
- (struct hbm_notification_response *)cmd;
- cl_dbg(dev, cl, "hbm: notify start response status=%d\n", rs->status);
- if (rs->status == MEI_HBMS_SUCCESS ||
- rs->status == MEI_HBMS_ALREADY_STARTED) {
- cl->notify_en = true;
- cl->status = 0;
- } else {
- cl->status = -EINVAL;
- }
- }
- /**
- * mei_hbm_cl_notify_stop_res - update the client state according
- * notify stop response
- *
- * @dev: the device structure
- * @cl: mei host client
- * @cmd: client notification stop response command
- */
- static void mei_hbm_cl_notify_stop_res(struct mei_device *dev,
- struct mei_cl *cl,
- struct mei_hbm_cl_cmd *cmd)
- {
- struct hbm_notification_response *rs =
- (struct hbm_notification_response *)cmd;
- cl_dbg(dev, cl, "hbm: notify stop response status=%d\n", rs->status);
- if (rs->status == MEI_HBMS_SUCCESS ||
- rs->status == MEI_HBMS_NOT_STARTED) {
- cl->notify_en = false;
- cl->status = 0;
- } else {
- /* TODO: spec is not clear yet about other possible issues */
- cl->status = -EINVAL;
- }
- }
- /**
- * mei_hbm_cl_notify - signal notification event
- *
- * @dev: the device structure
- * @cmd: notification client message
- */
- static void mei_hbm_cl_notify(struct mei_device *dev,
- struct mei_hbm_cl_cmd *cmd)
- {
- struct mei_cl *cl;
- cl = mei_hbm_cl_find_by_cmd(dev, cmd);
- if (cl)
- mei_cl_notify(cl);
- }
- /**
- * 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;
- if (res->status) {
- dev_err(dev->dev, "cl dma map failed %d\n", res->status);
- cl->status = -EFAULT;
- } else {
- dev_dbg(dev->dev, "cl dma map succeeded\n");
- cl->dma_mapped = 1;
- cl->status = 0;
- }
- 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;
- if (res->status) {
- dev_err(dev->dev, "cl dma unmap failed %d\n", res->status);
- cl->status = -EFAULT;
- } else {
- dev_dbg(dev->dev, "cl dma unmap succeeded\n");
- cl->dma_mapped = 0;
- cl->status = 0;
- }
- wake_up(&cl->wait);
- }
- /**
- * mei_hbm_prop_req - request property for a single client
- *
- * @dev: the device structure
- * @start_idx: client index to start search
- *
- * Return: 0 on success and < 0 on failure
- */
- static int mei_hbm_prop_req(struct mei_device *dev, unsigned long start_idx)
- {
- struct mei_msg_hdr mei_hdr;
- struct hbm_props_request req;
- unsigned long addr;
- int ret;
- addr = find_next_bit(dev->me_clients_map, MEI_CLIENTS_MAX, start_idx);
- /* We got all client properties */
- if (addr == MEI_CLIENTS_MAX) {
- dev->hbm_state = MEI_HBM_STARTED;
- mei_host_client_init(dev);
- return 0;
- }
- mei_hbm_hdr(&mei_hdr, sizeof(req));
- memset(&req, 0, sizeof(req));
- req.hbm_cmd = HOST_CLIENT_PROPERTIES_REQ_CMD;
- req.me_addr = addr;
- ret = mei_hbm_write_message(dev, &mei_hdr, &req);
- if (ret) {
- dev_err(dev->dev, "properties request write failed: ret = %d\n",
- ret);
- return ret;
- }
- dev->init_clients_timer = dev->timeouts.client_init;
- mei_schedule_stall_timer(dev);
- return 0;
- }
- /**
- * mei_hbm_pg - sends pg command
- *
- * @dev: the device structure
- * @pg_cmd: the pg command code
- *
- * Return: -EIO on write failure
- * -EOPNOTSUPP if the operation is not supported by the protocol
- */
- int mei_hbm_pg(struct mei_device *dev, u8 pg_cmd)
- {
- struct mei_msg_hdr mei_hdr;
- struct hbm_power_gate req;
- int ret;
- if (!dev->hbm_f_pg_supported)
- return -EOPNOTSUPP;
- mei_hbm_hdr(&mei_hdr, sizeof(req));
- memset(&req, 0, sizeof(req));
- req.hbm_cmd = pg_cmd;
- ret = mei_hbm_write_message(dev, &mei_hdr, &req);
- if (ret)
- dev_err(dev->dev, "power gate command write failed.\n");
- return ret;
- }
- EXPORT_SYMBOL_GPL(mei_hbm_pg);
- /**
- * mei_hbm_stop_req - send stop request message
- *
- * @dev: mei device
- *
- * Return: -EIO on write failure
- */
- static int mei_hbm_stop_req(struct mei_device *dev)
- {
- struct mei_msg_hdr mei_hdr;
- struct hbm_host_stop_request req;
- mei_hbm_hdr(&mei_hdr, sizeof(req));
- memset(&req, 0, sizeof(req));
- req.hbm_cmd = HOST_STOP_REQ_CMD;
- req.reason = DRIVER_STOP_REQUEST;
- return mei_hbm_write_message(dev, &mei_hdr, &req);
- }
- /**
- * mei_hbm_cl_flow_control_req - sends flow control request.
- *
- * @dev: the device structure
- * @cl: client info
- *
- * Return: -EIO on write failure
- */
- int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl)
- {
- struct hbm_flow_control req;
- cl_dbg(dev, cl, "sending flow control\n");
- return mei_hbm_cl_write(dev, cl, MEI_FLOW_CONTROL_CMD,
- &req, sizeof(req));
- }
- /**
- * mei_hbm_add_single_tx_flow_ctrl_creds - adds single buffer credentials.
- *
- * @dev: the device structure
- * @fctrl: flow control response bus message
- *
- * Return: 0 on success, < 0 otherwise
- */
- static int mei_hbm_add_single_tx_flow_ctrl_creds(struct mei_device *dev,
- struct hbm_flow_control *fctrl)
- {
- struct mei_me_client *me_cl;
- int rets;
- me_cl = mei_me_cl_by_id(dev, fctrl->me_addr);
- if (!me_cl) {
- dev_err(dev->dev, "no such me client %d\n", fctrl->me_addr);
- return -ENOENT;
- }
- if (WARN_ON(me_cl->props.single_recv_buf == 0)) {
- rets = -EINVAL;
- goto out;
- }
- me_cl->tx_flow_ctrl_creds++;
- dev_dbg(dev->dev, "recv flow ctrl msg ME %d (single) creds = %d.\n",
- fctrl->me_addr, me_cl->tx_flow_ctrl_creds);
- rets = 0;
- out:
- mei_me_cl_put(me_cl);
- return rets;
- }
- /**
- * mei_hbm_cl_tx_flow_ctrl_creds_res - flow control response from me
- *
- * @dev: the device structure
- * @fctrl: flow control response bus message
- */
- static void mei_hbm_cl_tx_flow_ctrl_creds_res(struct mei_device *dev,
- struct hbm_flow_control *fctrl)
- {
- struct mei_cl *cl;
- if (!fctrl->host_addr) {
- /* single receive buffer */
- mei_hbm_add_single_tx_flow_ctrl_creds(dev, fctrl);
- return;
- }
- cl = mei_hbm_cl_find_by_cmd(dev, fctrl);
- if (cl) {
- cl->tx_flow_ctrl_creds++;
- cl_dbg(dev, cl, "flow control creds = %d.\n",
- cl->tx_flow_ctrl_creds);
- }
- }
- /**
- * mei_hbm_cl_disconnect_req - sends disconnect message to fw.
- *
- * @dev: the device structure
- * @cl: a client to disconnect from
- *
- * Return: -EIO on write failure
- */
- int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl)
- {
- struct hbm_client_connect_request req;
- return mei_hbm_cl_write(dev, cl, CLIENT_DISCONNECT_REQ_CMD,
- &req, sizeof(req));
- }
- /**
- * mei_hbm_cl_disconnect_rsp - sends disconnect respose to the FW
- *
- * @dev: the device structure
- * @cl: a client to disconnect from
- *
- * Return: -EIO on write failure
- */
- int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl)
- {
- struct hbm_client_connect_response resp;
- return mei_hbm_cl_write(dev, cl, CLIENT_DISCONNECT_RES_CMD,
- &resp, sizeof(resp));
- }
- /**
- * mei_hbm_cl_disconnect_res - update the client state according
- * disconnect response
- *
- * @dev: the device structure
- * @cl: mei host client
- * @cmd: disconnect client response host bus message
- */
- static void mei_hbm_cl_disconnect_res(struct mei_device *dev, struct mei_cl *cl,
- struct mei_hbm_cl_cmd *cmd)
- {
- struct hbm_client_connect_response *rs =
- (struct hbm_client_connect_response *)cmd;
- cl_dbg(dev, cl, "hbm: disconnect response status=%d\n", rs->status);
- if (rs->status == MEI_CL_DISCONN_SUCCESS)
- cl->state = MEI_FILE_DISCONNECT_REPLY;
- cl->status = 0;
- }
- /**
- * mei_hbm_cl_connect_req - send connection request to specific me client
- *
- * @dev: the device structure
- * @cl: a client to connect to
- *
- * Return: -EIO on write failure
- */
- int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl)
- {
- struct hbm_client_connect_request req;
- return mei_hbm_cl_write(dev, cl, CLIENT_CONNECT_REQ_CMD,
- &req, sizeof(req));
- }
- /**
- * mei_hbm_cl_connect_res - update the client state according
- * connection response
- *
- * @dev: the device structure
- * @cl: mei host client
- * @cmd: connect client response host bus message
- */
- static void mei_hbm_cl_connect_res(struct mei_device *dev, struct mei_cl *cl,
- struct mei_hbm_cl_cmd *cmd)
- {
- struct hbm_client_connect_response *rs =
- (struct hbm_client_connect_response *)cmd;
- cl_dbg(dev, cl, "hbm: connect response status=%s\n",
- mei_cl_conn_status_str(rs->status));
- if (rs->status == MEI_CL_CONN_SUCCESS)
- cl->state = MEI_FILE_CONNECTED;
- else {
- cl->state = MEI_FILE_DISCONNECT_REPLY;
- if (rs->status == MEI_CL_CONN_NOT_FOUND) {
- mei_me_cl_del(dev, cl->me_cl);
- if (dev->dev_state == MEI_DEV_ENABLED)
- schedule_work(&dev->bus_rescan_work);
- }
- }
- cl->status = mei_cl_conn_status_to_errno(rs->status);
- }
- /**
- * mei_hbm_cl_res - process hbm response received on behalf
- * an client
- *
- * @dev: the device structure
- * @rs: hbm client message
- * @fop_type: file operation type
- */
- static void mei_hbm_cl_res(struct mei_device *dev,
- struct mei_hbm_cl_cmd *rs,
- enum mei_cb_file_ops fop_type)
- {
- struct mei_cl *cl;
- struct mei_cl_cb *cb, *next;
- cl = NULL;
- list_for_each_entry_safe(cb, next, &dev->ctrl_rd_list, list) {
- cl = cb->cl;
- if (cb->fop_type != fop_type)
- continue;
- if (mei_hbm_cl_addr_equal(cl, rs)) {
- list_del_init(&cb->list);
- break;
- }
- }
- if (!cl)
- return;
- switch (fop_type) {
- case MEI_FOP_CONNECT:
- mei_hbm_cl_connect_res(dev, cl, rs);
- break;
- case MEI_FOP_DISCONNECT:
- mei_hbm_cl_disconnect_res(dev, cl, rs);
- break;
- case MEI_FOP_NOTIFY_START:
- mei_hbm_cl_notify_start_res(dev, cl, rs);
- break;
- case MEI_FOP_NOTIFY_STOP:
- mei_hbm_cl_notify_stop_res(dev, cl, rs);
- break;
- default:
- return;
- }
- cl->timer_count = 0;
- wake_up(&cl->wait);
- }
- /**
- * mei_hbm_fw_disconnect_req - disconnect request initiated by ME firmware
- * host sends disconnect response
- *
- * @dev: the device structure.
- * @disconnect_req: disconnect request bus message from the me
- *
- * Return: -ENOMEM on allocation failure
- */
- static int mei_hbm_fw_disconnect_req(struct mei_device *dev,
- struct hbm_client_connect_request *disconnect_req)
- {
- struct mei_cl *cl;
- struct mei_cl_cb *cb;
- cl = mei_hbm_cl_find_by_cmd(dev, disconnect_req);
- if (cl) {
- cl_warn(dev, cl, "fw disconnect request received\n");
- cl->state = MEI_FILE_DISCONNECTING;
- cl->timer_count = 0;
- cb = mei_cl_enqueue_ctrl_wr_cb(cl, 0, MEI_FOP_DISCONNECT_RSP,
- NULL);
- if (!cb)
- return -ENOMEM;
- }
- return 0;
- }
- /**
- * mei_hbm_pg_enter_res - PG enter response received
- *
- * @dev: the device structure.
- *
- * Return: 0 on success, -EPROTO on state mismatch
- */
- static int mei_hbm_pg_enter_res(struct mei_device *dev)
- {
- if (mei_pg_state(dev) != MEI_PG_OFF ||
- dev->pg_event != MEI_PG_EVENT_WAIT) {
- dev_err(dev->dev, "hbm: pg entry response: state mismatch [%s, %d]\n",
- mei_pg_state_str(mei_pg_state(dev)), dev->pg_event);
- return -EPROTO;
- }
- dev->pg_event = MEI_PG_EVENT_RECEIVED;
- wake_up(&dev->wait_pg);
- return 0;
- }
- /**
- * mei_hbm_pg_resume - process with PG resume
- *
- * @dev: the device structure.
- */
- void mei_hbm_pg_resume(struct mei_device *dev)
- {
- pm_request_resume(dev->dev);
- }
- EXPORT_SYMBOL_GPL(mei_hbm_pg_resume);
- /**
- * mei_hbm_pg_exit_res - PG exit response received
- *
- * @dev: the device structure.
- *
- * Return: 0 on success, -EPROTO on state mismatch
- */
- static int mei_hbm_pg_exit_res(struct mei_device *dev)
- {
- if (mei_pg_state(dev) != MEI_PG_ON ||
- (dev->pg_event != MEI_PG_EVENT_WAIT &&
- dev->pg_event != MEI_PG_EVENT_IDLE)) {
- dev_err(dev->dev, "hbm: pg exit response: state mismatch [%s, %d]\n",
- mei_pg_state_str(mei_pg_state(dev)), dev->pg_event);
- return -EPROTO;
- }
- switch (dev->pg_event) {
- case MEI_PG_EVENT_WAIT:
- dev->pg_event = MEI_PG_EVENT_RECEIVED;
- wake_up(&dev->wait_pg);
- break;
- case MEI_PG_EVENT_IDLE:
- /*
- * If the driver is not waiting on this then
- * this is HW initiated exit from PG.
- * Start runtime pm resume sequence to exit from PG.
- */
- dev->pg_event = MEI_PG_EVENT_RECEIVED;
- mei_hbm_pg_resume(dev);
- break;
- default:
- WARN(1, "hbm: pg exit response: unexpected pg event = %d\n",
- dev->pg_event);
- return -EPROTO;
- }
- return 0;
- }
- /**
- * mei_hbm_config_features - check what hbm features and commands
- * are supported by the fw
- *
- * @dev: the device structure
- */
- static void mei_hbm_config_features(struct mei_device *dev)
- {
- /* Power Gating Isolation Support */
- dev->hbm_f_pg_supported = 0;
- if (dev->version.major_version > HBM_MAJOR_VERSION_PGI)
- dev->hbm_f_pg_supported = 1;
- if (dev->version.major_version == HBM_MAJOR_VERSION_PGI &&
- dev->version.minor_version >= HBM_MINOR_VERSION_PGI)
- dev->hbm_f_pg_supported = 1;
- dev->hbm_f_dc_supported = 0;
- if (dev->version.major_version >= HBM_MAJOR_VERSION_DC)
- dev->hbm_f_dc_supported = 1;
- dev->hbm_f_ie_supported = 0;
- if (dev->version.major_version >= HBM_MAJOR_VERSION_IE)
- dev->hbm_f_ie_supported = 1;
- /* disconnect on connect timeout instead of link reset */
- dev->hbm_f_dot_supported = 0;
- if (dev->version.major_version >= HBM_MAJOR_VERSION_DOT)
- dev->hbm_f_dot_supported = 1;
- /* Notification Event Support */
- dev->hbm_f_ev_supported = 0;
- if (dev->version.major_version >= HBM_MAJOR_VERSION_EV)
- dev->hbm_f_ev_supported = 1;
- /* Fixed Address Client Support */
- dev->hbm_f_fa_supported = 0;
- if (dev->version.major_version >= HBM_MAJOR_VERSION_FA)
- dev->hbm_f_fa_supported = 1;
- /* OS ver message Support */
- dev->hbm_f_os_supported = 0;
- if (dev->version.major_version >= HBM_MAJOR_VERSION_OS)
- dev->hbm_f_os_supported = 1;
- /* DMA Ring Support */
- dev->hbm_f_dr_supported = 0;
- if (dev->version.major_version > HBM_MAJOR_VERSION_DR ||
- (dev->version.major_version == HBM_MAJOR_VERSION_DR &&
- dev->version.minor_version >= HBM_MINOR_VERSION_DR))
- dev->hbm_f_dr_supported = 1;
- /* VTag Support */
- dev->hbm_f_vt_supported = 0;
- if (dev->version.major_version > HBM_MAJOR_VERSION_VT ||
- (dev->version.major_version == HBM_MAJOR_VERSION_VT &&
- dev->version.minor_version >= HBM_MINOR_VERSION_VT))
- dev->hbm_f_vt_supported = 1;
- /* Capability message Support */
- 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;
- /* 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;
- }
- /**
- * mei_hbm_version_is_supported - checks whether the driver can
- * support the hbm version of the device
- *
- * @dev: the device structure
- * Return: true if driver can support hbm version of the device
- */
- bool mei_hbm_version_is_supported(struct mei_device *dev)
- {
- return (dev->version.major_version < HBM_MAJOR_VERSION) ||
- (dev->version.major_version == HBM_MAJOR_VERSION &&
- dev->version.minor_version <= HBM_MINOR_VERSION);
- }
- /**
- * mei_hbm_dispatch - bottom half read routine after ISR to
- * handle the read bus message cmd processing.
- *
- * @dev: the device structure
- * @hdr: header of bus message
- *
- * Return: 0 on success and < 0 on failure
- */
- int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
- {
- struct mei_bus_message *mei_msg;
- struct hbm_host_version_response *version_res;
- struct hbm_props_response *props_res;
- struct hbm_host_enum_response *enum_res;
- struct hbm_dma_setup_response *dma_setup_res;
- struct hbm_add_client_request *add_cl_req;
- struct hbm_capability_response *capability_res;
- int ret;
- 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));
- mei_read_slots(dev, dev->rd_msg_buf, hdr->length);
- mei_msg = (struct mei_bus_message *)dev->rd_msg_buf;
- cl_cmd = (struct mei_hbm_cl_cmd *)mei_msg;
- /* ignore spurious message and prevent reset nesting
- * hbm is put to idle during system reset
- */
- if (dev->hbm_state == MEI_HBM_IDLE) {
- dev_dbg(dev->dev, "hbm: state is idle ignore spurious messages\n");
- return 0;
- }
- switch (mei_msg->hbm_cmd) {
- case HOST_START_RES_CMD:
- dev_dbg(dev->dev, "hbm: start: response message received.\n");
- dev->init_clients_timer = 0;
- version_res = (struct hbm_host_version_response *)mei_msg;
- dev_dbg(dev->dev, "HBM VERSION: DRIVER=%02d:%02d DEVICE=%02d:%02d\n",
- HBM_MAJOR_VERSION, HBM_MINOR_VERSION,
- version_res->me_max_version.major_version,
- version_res->me_max_version.minor_version);
- if (version_res->host_version_supported) {
- dev->version.major_version = HBM_MAJOR_VERSION;
- dev->version.minor_version = HBM_MINOR_VERSION;
- } else {
- dev->version.major_version =
- version_res->me_max_version.major_version;
- dev->version.minor_version =
- version_res->me_max_version.minor_version;
- }
- if (!mei_hbm_version_is_supported(dev)) {
- dev_warn(dev->dev, "hbm: start: version mismatch - stopping the driver.\n");
- dev->hbm_state = MEI_HBM_STOPPED;
- if (mei_hbm_stop_req(dev)) {
- dev_err(dev->dev, "hbm: start: failed to send stop request\n");
- return -EIO;
- }
- break;
- }
- mei_hbm_config_features(dev);
- if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
- dev->hbm_state != MEI_HBM_STARTING) {
- if (dev->dev_state == MEI_DEV_POWER_DOWN ||
- dev->dev_state == MEI_DEV_POWERING_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;
- }
- 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");
- if (mei_dma_ring_is_allocated(dev)) {
- if (mei_hbm_dma_setup_req(dev))
- return -EIO;
- wake_up(&dev->wait_hbm_start);
- break;
- }
- }
- dev->hbm_f_dr_supported = 0;
- mei_dmam_ring_free(dev);
- if (mei_hbm_enum_clients_req(dev))
- return -EIO;
- 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->dev_state != MEI_DEV_INIT_CLIENTS ||
- dev->hbm_state != MEI_HBM_CAP_SETUP) {
- if (dev->dev_state == MEI_DEV_POWER_DOWN ||
- dev->dev_state == MEI_DEV_POWERING_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;
- }
- 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))
- 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");
- dev->init_clients_timer = 0;
- if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
- dev->hbm_state != MEI_HBM_DR_SETUP) {
- if (dev->dev_state == MEI_DEV_POWER_DOWN ||
- dev->dev_state == MEI_DEV_POWERING_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;
- }
- dma_setup_res = (struct hbm_dma_setup_response *)mei_msg;
- if (dma_setup_res->status) {
- u8 status = dma_setup_res->status;
- if (status == MEI_HBMS_NOT_ALLOWED) {
- dev_dbg(dev->dev, "hbm: dma setup not allowed\n");
- } else {
- dev_info(dev->dev, "hbm: dma setup response: failure = %d %s\n",
- status,
- mei_hbm_status_str(status));
- }
- dev->hbm_f_dr_supported = 0;
- mei_dmam_ring_free(dev);
- }
- if (mei_hbm_enum_clients_req(dev))
- return -EIO;
- break;
- case CLIENT_CONNECT_RES_CMD:
- dev_dbg(dev->dev, "hbm: client connect response: message received.\n");
- mei_hbm_cl_res(dev, cl_cmd, MEI_FOP_CONNECT);
- break;
- case CLIENT_DISCONNECT_RES_CMD:
- dev_dbg(dev->dev, "hbm: client disconnect response: message received.\n");
- mei_hbm_cl_res(dev, cl_cmd, MEI_FOP_DISCONNECT);
- break;
- case MEI_FLOW_CONTROL_CMD:
- dev_dbg(dev->dev, "hbm: client flow control response: message received.\n");
- fctrl = (struct hbm_flow_control *)mei_msg;
- mei_hbm_cl_tx_flow_ctrl_creds_res(dev, fctrl);
- break;
- case MEI_PG_ISOLATION_ENTRY_RES_CMD:
- dev_dbg(dev->dev, "hbm: power gate isolation entry response received\n");
- ret = mei_hbm_pg_enter_res(dev);
- if (ret)
- return ret;
- break;
- case MEI_PG_ISOLATION_EXIT_REQ_CMD:
- dev_dbg(dev->dev, "hbm: power gate isolation exit request received\n");
- ret = mei_hbm_pg_exit_res(dev);
- if (ret)
- return ret;
- break;
- case HOST_CLIENT_PROPERTIES_RES_CMD:
- dev_dbg(dev->dev, "hbm: properties response: message received.\n");
- dev->init_clients_timer = 0;
- if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
- dev->hbm_state != MEI_HBM_CLIENT_PROPERTIES) {
- if (dev->dev_state == MEI_DEV_POWER_DOWN ||
- dev->dev_state == MEI_DEV_POWERING_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;
- }
- props_res = (struct hbm_props_response *)mei_msg;
- if (props_res->status == MEI_HBMS_CLIENT_NOT_FOUND) {
- dev_dbg(dev->dev, "hbm: properties response: %d CLIENT_NOT_FOUND\n",
- props_res->me_addr);
- } else if (props_res->status) {
- dev_err(dev->dev, "hbm: properties response: wrong status = %d %s\n",
- props_res->status,
- mei_hbm_status_str(props_res->status));
- return -EPROTO;
- } else {
- mei_hbm_me_cl_add(dev, props_res);
- }
- /* request property for the next client */
- if (mei_hbm_prop_req(dev, props_res->me_addr + 1))
- return -EIO;
- break;
- case HOST_ENUM_RES_CMD:
- dev_dbg(dev->dev, "hbm: enumeration response: message received\n");
- dev->init_clients_timer = 0;
- enum_res = (struct hbm_host_enum_response *) mei_msg;
- BUILD_BUG_ON(sizeof(dev->me_clients_map)
- < sizeof(enum_res->valid_addresses));
- memcpy(dev->me_clients_map, enum_res->valid_addresses,
- sizeof(enum_res->valid_addresses));
- if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
- dev->hbm_state != MEI_HBM_ENUM_CLIENTS) {
- if (dev->dev_state == MEI_DEV_POWER_DOWN ||
- dev->dev_state == MEI_DEV_POWERING_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;
- }
- dev->hbm_state = MEI_HBM_CLIENT_PROPERTIES;
- /* first property request */
- if (mei_hbm_prop_req(dev, 0))
- return -EIO;
- break;
- case HOST_STOP_RES_CMD:
- dev_dbg(dev->dev, "hbm: stop response: message received\n");
- dev->init_clients_timer = 0;
- if (dev->hbm_state != MEI_HBM_STOPPED) {
- dev_err(dev->dev, "hbm: stop response: state mismatch, [%d, %d]\n",
- dev->dev_state, dev->hbm_state);
- return -EPROTO;
- }
- mei_set_devstate(dev, MEI_DEV_POWER_DOWN);
- dev_info(dev->dev, "hbm: stop response: resetting.\n");
- /* force the reset */
- return -EPROTO;
- case CLIENT_DISCONNECT_REQ_CMD:
- dev_dbg(dev->dev, "hbm: disconnect request: message received\n");
- disconnect_req = (struct hbm_client_connect_request *)mei_msg;
- mei_hbm_fw_disconnect_req(dev, disconnect_req);
- break;
- case ME_STOP_REQ_CMD:
- dev_dbg(dev->dev, "hbm: stop request: message received\n");
- dev->hbm_state = MEI_HBM_STOPPED;
- if (mei_hbm_stop_req(dev)) {
- dev_err(dev->dev, "hbm: stop request: failed to send stop request\n");
- return -EIO;
- }
- break;
- case MEI_HBM_ADD_CLIENT_REQ_CMD:
- dev_dbg(dev->dev, "hbm: add client request received\n");
- /*
- * after the host receives the enum_resp
- * message clients may be added or removed
- */
- if (dev->hbm_state <= MEI_HBM_ENUM_CLIENTS ||
- dev->hbm_state >= MEI_HBM_STOPPED) {
- dev_err(dev->dev, "hbm: add client: state mismatch, [%d, %d]\n",
- dev->dev_state, dev->hbm_state);
- return -EPROTO;
- }
- add_cl_req = (struct hbm_add_client_request *)mei_msg;
- ret = mei_hbm_fw_add_cl_req(dev, add_cl_req);
- if (ret) {
- dev_err(dev->dev, "hbm: add client: failed to send response %d\n",
- ret);
- return -EIO;
- }
- dev_dbg(dev->dev, "hbm: add client request processed\n");
- break;
- case MEI_HBM_NOTIFY_RES_CMD:
- dev_dbg(dev->dev, "hbm: notify response received\n");
- mei_hbm_cl_res(dev, cl_cmd, notify_res_to_fop(cl_cmd));
- break;
- case MEI_HBM_NOTIFICATION_CMD:
- dev_dbg(dev->dev, "hbm: notification\n");
- 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;
- }
- return 0;
- }
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