diff options
Diffstat (limited to 'drivers/ieee1394/sbp2.h')
| -rw-r--r-- | drivers/ieee1394/sbp2.h | 80 |
1 files changed, 33 insertions, 47 deletions
diff --git a/drivers/ieee1394/sbp2.h b/drivers/ieee1394/sbp2.h index 5483b458bd77..d1dbc0d63177 100644 --- a/drivers/ieee1394/sbp2.h +++ b/drivers/ieee1394/sbp2.h @@ -25,7 +25,7 @@ #define SBP2_DEVICE_NAME "sbp2" /* - * SBP2 specific structures and defines + * SBP-2 specific definitions */ #define ORB_DIRECTION_WRITE_TO_MEDIA 0x0 @@ -185,8 +185,9 @@ struct sbp2_status_block { u8 command_set_dependent[24]; } __attribute__((packed)); + /* - * Miscellaneous SBP2 related config rom defines + * SBP2 related configuration ROM definitions */ #define SBP2_UNIT_DIRECTORY_OFFSET_KEY 0xd1 @@ -207,19 +208,17 @@ struct sbp2_status_block { #define SBP2_UNSOLICITED_STATUS_VALUE 0xf #define SBP2_BUSY_TIMEOUT_ADDRESS 0xfffff0000210ULL +/* biggest possible value for Single Phase Retry count is 0xf */ #define SBP2_BUSY_TIMEOUT_VALUE 0xf #define SBP2_AGENT_RESET_DATA 0xf -/* - * Unit spec id and sw version entry for SBP-2 devices - */ - #define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e #define SBP2_SW_VERSION_ENTRY 0x00010483 + /* - * SCSI specific stuff + * SCSI specific definitions */ #define SBP2_MAX_SG_ELEMENT_LENGTH 0xf000 @@ -237,18 +236,19 @@ struct sbp2_status_block { #define SBP2_SCSI_STATUS_COMMAND_TERMINATED 0x22 #define SBP2_SCSI_STATUS_SELECTION_TIMEOUT 0xff -/* This is the two dma types we use for cmd_dma below */ + +/* + * Representations of commands and devices + */ + enum cmd_dma_types { CMD_DMA_NONE, CMD_DMA_PAGE, CMD_DMA_SINGLE }; -/* - * Encapsulates all the info necessary for an outstanding command. - */ +/* Per SCSI command */ struct sbp2_command_info { - struct list_head list; struct sbp2_command_orb command_orb ____cacheline_aligned; dma_addr_t command_orb_dma ____cacheline_aligned; @@ -263,18 +263,17 @@ struct sbp2_command_info { enum cmd_dma_types dma_type; unsigned long dma_size; int dma_dir; - }; -struct sbp2scsi_host_info; +/* Per FireWire host */ +struct sbp2scsi_host_info { + struct hpsb_host *host; + struct list_head scsi_ids; +}; -/* - * Information needed on a per scsi id basis (one for each sbp2 device) - */ +/* Per logical unit */ struct scsi_id_instance_data { - /* - * Various sbp2 specific structures - */ + /* Operation request blocks */ struct sbp2_command_orb *last_orb; dma_addr_t last_orb_dma; struct sbp2_login_orb *login_orb; @@ -291,57 +290,49 @@ struct scsi_id_instance_data { dma_addr_t logout_orb_dma; struct sbp2_status_block status_block; - /* - * Stuff we need to know about the sbp2 device itself - */ + /* How to talk to the unit */ u64 sbp2_management_agent_addr; u64 sbp2_command_block_agent_addr; u32 speed_code; u32 max_payload_size; - /* - * Values pulled from the device's unit directory - */ + /* Pulled from the device's unit directory */ u32 sbp2_command_set_spec_id; u32 sbp2_command_set; u32 sbp2_unit_characteristics; u32 sbp2_lun; u32 sbp2_firmware_revision; - /* - * Address for the device to write status blocks to - */ + /* Address for the unit to write status blocks to */ u64 status_fifo_addr; - /* - * Waitqueue flag for logins, reconnects, logouts, query logins - */ + /* Waitqueue flag for logins, reconnects, logouts, query logins */ int access_complete:1; - /* - * Pool of command orbs, so we can have more than overlapped command per id - */ + /* Pool of command ORBs for this logical unit */ spinlock_t sbp2_command_orb_lock; struct list_head sbp2_command_orb_inuse; struct list_head sbp2_command_orb_completed; + /* Backlink to FireWire host; list of units attached to the host */ + struct sbp2scsi_host_info *hi; struct list_head scsi_list; - /* Node entry, as retrieved from NodeMgr entries */ + /* IEEE 1394 core's device representations */ struct node_entry *ne; struct unit_directory *ud; - /* A backlink to our host_info */ - struct sbp2scsi_host_info *hi; - - /* SCSI related pointers */ + /* SCSI core's device representations */ struct scsi_device *sdev; struct Scsi_Host *scsi_host; /* Device specific workarounds/brokeness */ unsigned workarounds; + /* Connection state */ atomic_t state; + + /* For deferred requests to the fetch agent */ struct work_struct protocol_work; }; @@ -352,13 +343,8 @@ enum sbp2lu_state_types { SBP2LU_STATE_IN_SHUTDOWN /* when sbp2_remove was called */ }; -/* Sbp2 host data structure (one per IEEE1394 host) */ -struct sbp2scsi_host_info { - struct hpsb_host *host; /* IEEE1394 host */ - struct list_head scsi_ids; /* List of scsi ids on this host */ -}; - -/* Flags for detected oddities and brokeness */ +/* For use in scsi_id_instance_data.workarounds and in the corresponding + * module load parameter */ #define SBP2_WORKAROUND_128K_MAX_TRANS 0x1 #define SBP2_WORKAROUND_INQUIRY_36 0x2 #define SBP2_WORKAROUND_MODE_SENSE_8 0x4 |