MTIP_MAX_COMMAND_SLOTS
dd->tags.queue_depth = MTIP_MAX_COMMAND_SLOTS;
#define HW_CMD_SLOT_SZ (MTIP_MAX_COMMAND_SLOTS * 32)
#define AHCI_CMD_TBL_SZ (MTIP_MAX_COMMAND_SLOTS * AHCI_CMD_SLOT_SZ)