/**
* heci_reset - resets host and fw.
*
* @dev: the device structure
* @interrupts_enabled: if interrupt should be enabled after reset.
*/
void heci_reset(struct heci_device *dev, int interrupts_enabled)
{
bool unexpected;
int ret;
unexpected = (dev->dev_state != HECI_DEV_INITIALIZING &&
dev->dev_state != HECI_DEV_DISABLED &&
dev->dev_state != HECI_DEV_POWER_DOWN &&
dev->dev_state != HECI_DEV_POWER_UP);
ret = heci_hw_reset(dev, interrupts_enabled);
if (ret) {
dev_err(&dev->pdev->dev, "hw reset failed disabling the device\n");
interrupts_enabled = false;
dev->dev_state = HECI_DEV_DISABLED;
}
dev->hbm_state = HECI_HBM_IDLE;
if (dev->dev_state != HECI_DEV_INITIALIZING) {
if (dev->dev_state != HECI_DEV_DISABLED &&
dev->dev_state != HECI_DEV_POWER_DOWN)
dev->dev_state = HECI_DEV_RESETTING;
heci_cl_all_disconnect(dev);
memset(&dev->wr_ext_msg, 0, sizeof(dev->wr_ext_msg));
}
dev->me_clients_num = 0;
dev->rd_msg_hdr = 0;
if (unexpected)
dev_warn(&dev->pdev->dev, "unexpected reset: dev_state = %s\n",
heci_dev_state_str(dev->dev_state));
if (!interrupts_enabled) {
dev_dbg(&dev->pdev->dev, "intr not enabled end of reset\n");
return;
}
dev_dbg(&dev->pdev->dev, "before sending HOST start\n");
ret = heci_hw_start(dev);
if (ret) {
dev_err(&dev->pdev->dev, "hw_start failed disabling the device\n");
dev->dev_state = HECI_DEV_DISABLED;
return;
}
dev_dbg(&dev->pdev->dev, "link is established start sending messages.\n");
/* link is established * start sending messages. */
dev->dev_state = HECI_DEV_INIT_CLIENTS;
dev->hbm_state = HECI_HBM_START;
heci_hbm_start_req(dev);
/* wake up all readings so they can be interrupted */
heci_cl_all_read_wakeup(dev);
/* remove all waiting requests */
heci_cl_all_write_clear(dev);
}
/*
* heci_reset - reset host and fw.
*
* @dev: Device object for our driver
* @interrupts: if interrupt should be enable after reset.
*/
void
heci_reset(struct iamt_heci_device *dev, int interrupts)
{
struct heci_file_private *file_pos = NULL;
struct heci_file_private *file_next = NULL;
struct heci_cb_private *priv_cb_pos = NULL;
struct heci_cb_private *priv_cb_next = NULL;
int unexpected = 0;
if (dev->heci_state == HECI_RECOVERING_FROM_RESET) {
dev->need_reset = 1;
return;
}
if (dev->heci_state != HECI_INITIALIZING &&
dev->heci_state != HECI_DISABLED &&
dev->heci_state != HECI_POWER_DOWN &&
dev->heci_state != HECI_POWER_UP)
unexpected = 1;
if (dev->reinit_tsk != NULL) {
mutex_exit(&dev->device_lock);
(void) ddi_taskq_wait(dev->reinit_tsk);
mutex_enter(&dev->device_lock);
}
dev->host_hw_state = read_heci_register(dev, H_CSR);
DBG("before reset host_hw_state = 0x%08x.\n",
dev->host_hw_state);
heci_hw_reset(dev, interrupts);
dev->host_hw_state &= ~H_RST;
dev->host_hw_state |= H_IG;
write_heci_register(dev, H_CSR, dev->host_hw_state);
DBG("currently saved host_hw_state = 0x%08x.\n",
dev->host_hw_state);
dev->need_reset = 0;
if (dev->heci_state != HECI_INITIALIZING) {
if ((dev->heci_state != HECI_DISABLED) &&
(dev->heci_state != HECI_POWER_DOWN))
dev->heci_state = HECI_RESETING;
list_for_each_entry_safe(file_pos,
file_next, &dev->file_list, link,
struct heci_file_private) {
file_pos->state = HECI_FILE_DISCONNECTED;
file_pos->flow_ctrl_creds = 0;
file_pos->read_cb = NULL;
file_pos->timer_count = 0;
}
/* remove entry if already in list */
DBG("list del iamthif and wd file list.\n");
heci_remove_client_from_file_list(dev,
dev->wd_file_ext.host_client_id);
heci_remove_client_from_file_list(dev,
dev->iamthif_file_ext.host_client_id);
heci_reset_iamthif_params(dev);
dev->wd_due_counter = 0;
dev->extra_write_index = 0;
}
dev->num_heci_me_clients = 0;
dev->rd_msg_hdr = 0;
dev->stop = 0;
dev->wd_pending = 0;
/* update the state of the registers after reset */
dev->host_hw_state = read_heci_register(dev, H_CSR);
dev->me_hw_state = read_heci_register(dev, ME_CSR_HA);
DBG("after reset host_hw_state = 0x%08x, me_hw_state = 0x%08x.\n",
dev->host_hw_state, dev->me_hw_state);
if (unexpected)
cmn_err(CE_WARN, "unexpected heci reset.\n");
/* Wake up all readings so they can be interrupted */
list_for_each_entry_safe(file_pos, file_next, &dev->file_list, link,
struct heci_file_private) {
cmn_err(CE_NOTE, "heci: Waking up client!\n");
cv_broadcast(&file_pos->rx_wait);
}
/* remove all waiting requests */
if (dev->write_list.status == 0 &&
!list_empty(&dev->write_list.heci_cb.cb_list)) {
list_for_each_entry_safe(priv_cb_pos, priv_cb_next,
&dev->write_list.heci_cb.cb_list, cb_list,
struct heci_cb_private) {
if (priv_cb_pos) {
list_del(&priv_cb_pos->cb_list);
heci_free_cb_private(priv_cb_pos);
}
}
}