static bool pvscsi_setup_req_threshold(struct pvscsi_adapter *adapter,
bool enable)
{
u32 val;
if (!pvscsi_use_req_threshold)
return false;
pvscsi_reg_write(adapter, PVSCSI_REG_OFFSET_COMMAND,
PVSCSI_CMD_SETUP_REQCALLTHRESHOLD);
val = pvscsi_reg_read(adapter, PVSCSI_REG_OFFSET_COMMAND_STATUS);
if (val == -1) {
printk(KERN_INFO "vmw_pvscsi: device does not support req_threshold\n");
return false;
} else {
struct PVSCSICmdDescSetupReqCall cmd_msg = { 0 };
cmd_msg.enable = enable;
printk(KERN_INFO
"vmw_pvscsi: %sabling reqCallThreshold\n",
enable ? "en" : "dis");
pvscsi_write_cmd_desc(adapter,
PVSCSI_CMD_SETUP_REQCALLTHRESHOLD,
&cmd_msg, sizeof(cmd_msg));
return pvscsi_reg_read(adapter,
PVSCSI_REG_OFFSET_COMMAND_STATUS) != 0;
}
}
static int pvscsi_setup_msg_workqueue(struct pvscsi_adapter *adapter)
{
char name[32];
if (!pvscsi_use_msg)
return 0;
pvscsi_reg_write(adapter, PVSCSI_REG_OFFSET_COMMAND,
PVSCSI_CMD_SETUP_MSG_RING);
if (pvscsi_reg_read(adapter, PVSCSI_REG_OFFSET_COMMAND_STATUS) == -1)
return 0;
snprintf(name, sizeof(name),
"vmw_pvscsi_wq_%u", adapter->host->host_no);
adapter->workqueue = create_singlethread_workqueue(name);
if (!adapter->workqueue) {
printk(KERN_ERR "vmw_pvscsi: failed to create work queue\n");
return 0;
}
INIT_WORK(&adapter->work, pvscsi_msg_workqueue_handler);
return 1;
}
static u32 pvscsi_read_intr_status(const struct pvscsi_adapter *adapter)
{
return pvscsi_reg_read(adapter, PVSCSI_REG_OFFSET_INTR_STATUS);
}