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bus_dma_tag_t hw_desc_tag;		bus_dma_tag_t hw_desc_tag;
bus_dmamap_t hw_desc_map;		bus_dmamap_t hw_desc_map;

bus_dma_tag_t comp_update_tag;		bus_dma_tag_t comp_update_tag;
bus_dmamap_t comp_update_map;		bus_dmamap_t comp_update_map;
uint64_t *comp_update;		uint64_t *comp_update;
bus_addr_t comp_update_bus_addr;		bus_addr_t comp_update_bus_addr;

struct callout timer;		struct callout poll_timer;
		struct callout shrink_timer;
struct task reset_task;		struct task reset_task;

boolean_t quiescing;		boolean_t quiescing;
boolean_t destroying;		boolean_t destroying;
boolean_t is_resize_pending;		boolean_t is_resize_pending;
boolean_t is_completion_pending;		boolean_t is_completion_pending; /* submit_lock */
boolean_t is_reset_pending;		boolean_t is_reset_pending;
boolean_t is_channel_running;		boolean_t is_channel_running;
boolean_t intrdelay_supported;		boolean_t intrdelay_supported;
		boolean_t resetting; /* submit_lock */
		boolean_t resetting_cleanup; /* cleanup_lock */

uint32_t head;		uint32_t head;
uint32_t tail;		uint32_t tail;
uint32_t hw_head;		uint32_t hw_head;
uint32_t ring_size_order;		uint32_t ring_size_order;
bus_addr_t last_seen;		bus_addr_t last_seen;

struct ioat_descriptor **ring;		struct ioat_descriptor **ring;
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