diff options
Diffstat (limited to 'drivers/scsi/isci/host.h')
| -rw-r--r-- | drivers/scsi/isci/host.h | 47 |
1 files changed, 7 insertions, 40 deletions
diff --git a/drivers/scsi/isci/host.h b/drivers/scsi/isci/host.h index c61a9fa130b7..7d17ab80f1a9 100644 --- a/drivers/scsi/isci/host.h +++ b/drivers/scsi/isci/host.h @@ -184,13 +184,8 @@ struct scic_sds_controller { */ struct scic_power_control power_control; - /** - * This field is the array of sequence values for the IO Tag fields. Even - * though only 4 bits of the field is used for the sequence the sequence is 16 - * bits in size so the sequence can be bitwise or'd with the TCi to build the - * IO Tag value. - */ - u16 io_request_sequence[SCI_MAX_IO_REQUESTS]; + /* sequence number per tci */ + u8 io_request_sequence[SCI_MAX_IO_REQUESTS]; /** * This field in the array of sequence values for the RNi. These are used @@ -552,40 +547,12 @@ static inline struct isci_host *scic_to_ihost(struct scic_sds_controller *scic) */ #define scic_sds_controller_get_protocol_engine_group(controller) 0 -/** - * scic_sds_io_tag_construct() - - * - * This macro constructs an IO tag from the sequence and index values. - */ -#define scic_sds_io_tag_construct(sequence, task_index) \ - ((sequence) << 12 | (task_index)) - -/** - * scic_sds_io_tag_get_sequence() - - * - * This macro returns the IO sequence from the IO tag value. - */ -#define scic_sds_io_tag_get_sequence(io_tag) \ - (((io_tag) & 0xF000) >> 12) - -/** - * scic_sds_io_tag_get_index() - - * - * This macro returns the TCi from the io tag value - */ -#define scic_sds_io_tag_get_index(io_tag) \ - ((io_tag) & 0x0FFF) +/* see scic_controller_io_tag_allocate|free for how seq and tci are built */ +#define ISCI_TAG(seq, tci) (((u16) (seq)) << 12 | tci) -/** - * scic_sds_io_sequence_increment() - - * - * This is a helper macro to increment the io sequence count. We may find in - * the future that it will be faster to store the sequence count in such a way - * as we dont perform the shift operation to build io tag values so therefore - * need a way to incrment them correctly - */ -#define scic_sds_io_sequence_increment(value) \ - ((value) = (((value) + 1) & 0x000F)) +/* these are returned by the hardware, so sanitize them */ +#define ISCI_TAG_SEQ(tag) (((tag) >> 12) & (SCI_MAX_SEQ-1)) +#define ISCI_TAG_TCI(tag) ((tag) & (SCI_MAX_IO_REQUESTS-1)) /* expander attached sata devices require 3 rnc slots */ static inline int scic_sds_remote_device_node_count(struct scic_sds_remote_device *sci_dev) |