#define SBP2_DEVICE_NAME "sbp2"
/*
- * SBP2 specific structures and defines
+ * There is no transport protocol limit to the CDB length, but we implement
+ * a fixed length only. 16 bytes is enough for disks larger than 2 TB.
+ */
+#define SBP2_MAX_CDB_SIZE 16
+
+/*
+ * SBP-2 specific definitions
*/
#define ORB_DIRECTION_WRITE_TO_MEDIA 0x0
u32 data_descriptor_hi;
u32 data_descriptor_lo;
u32 misc;
- u8 cdb[12];
+ u8 cdb[SBP2_MAX_CDB_SIZE];
} __attribute__((packed));
#define SBP2_LOGIN_REQUEST 0x0
#define ORB_SET_LUN(v) ((v) & 0xffff)
#define ORB_SET_FUNCTION(v) (((v) & 0xf) << 16)
#define ORB_SET_RECONNECT(v) (((v) & 0xf) << 20)
-#define ORB_SET_EXCLUSIVE(v) (((v) & 0x1) << 28)
+#define ORB_SET_EXCLUSIVE(v) ((v) ? 1 << 28 : 0)
#define ORB_SET_LOGIN_RESP_LENGTH(v) ((v) & 0xffff)
#define ORB_SET_PASSWD_LENGTH(v) (((v) & 0xffff) << 16)
u32 status_fifo_lo;
} __attribute__((packed));
-#define PAGE_TABLE_SET_SEGMENT_BASE_HI(v) ((v) & 0xffff)
-#define PAGE_TABLE_SET_SEGMENT_LENGTH(v) (((v) & 0xffff) << 16)
-
struct sbp2_unrestricted_page_table {
- u32 length_segment_base_hi;
- u32 segment_base_lo;
-} __attribute__((packed));
+ __be32 high;
+ __be32 low;
+};
#define RESP_STATUS_REQUEST_COMPLETE 0x0
#define RESP_STATUS_TRANSPORT_FAILURE 0x1
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
#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
+ * The default maximum s/g segment size of a FireWire controller is
+ * usually 0x10000, but SBP-2 only allows 0xffff. Since buffers have to
+ * be quadlet-aligned, we set the length limit to 0xffff & ~3.
*/
+#define SBP2_MAX_SEG_SIZE 0xfffc
-#define SBP2_MAX_SG_ELEMENT_LENGTH 0xf000
-#define SBP2_MAX_SECTORS 255
-/* There is no real limitation of the queue depth (i.e. length of the linked
+/*
+ * There is no real limitation of the queue depth (i.e. length of the linked
* list of command ORBs) at the target. The chosen depth is merely an
- * implementation detail of the sbp2 driver. */
+ * implementation detail of the sbp2 driver.
+ */
#define SBP2_MAX_CMDS 8
#define SBP2_SCSI_STATUS_GOOD 0x0
#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 */
-enum cmd_dma_types {
- CMD_DMA_NONE,
- CMD_DMA_PAGE,
- CMD_DMA_SINGLE
-};
/*
- * Encapsulates all the info necessary for an outstanding command.
+ * Representations of commands and devices
*/
-struct sbp2_command_info {
+/* 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;
+ struct sbp2_command_orb command_orb;
+ dma_addr_t command_orb_dma;
struct scsi_cmnd *Current_SCpnt;
void (*Current_done)(struct scsi_cmnd *);
/* Also need s/g structure for each sbp2 command */
- struct sbp2_unrestricted_page_table scatter_gather_element[SG_ALL] ____cacheline_aligned;
- dma_addr_t sge_dma ____cacheline_aligned;
- void *sge_buffer;
- dma_addr_t cmd_dma;
- enum cmd_dma_types dma_type;
- unsigned long dma_size;
- int dma_dir;
-
+ struct sbp2_unrestricted_page_table
+ scatter_gather_element[SG_ALL] __attribute__((aligned(8)));
+ dma_addr_t sge_dma;
};
-struct sbp2scsi_host_info;
+/* Per FireWire host */
+struct sbp2_fwhost_info {
+ struct hpsb_host *host;
+ struct list_head logical_units;
+};
-/*
- * Information needed on a per scsi id basis (one for each sbp2 device)
- */
-struct scsi_id_instance_data {
- /*
- * Various sbp2 specific structures
- */
+/* Per logical unit */
+struct sbp2_lu {
+ /* Operation request blocks */
struct sbp2_command_orb *last_orb;
dma_addr_t last_orb_dma;
struct sbp2_login_orb *login_orb;
dma_addr_t logout_orb_dma;
struct sbp2_status_block status_block;
- /*
- * Stuff we need to know about the sbp2 device itself
- */
- u64 sbp2_management_agent_addr;
- u64 sbp2_command_block_agent_addr;
+ /* How to talk to the unit */
+ u64 management_agent_addr;
+ u64 command_block_agent_addr;
u32 speed_code;
u32 max_payload_size;
+ u16 lun;
- /*
- * Values 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
- */
- int access_complete:1;
+ /* Waitqueue flag for logins, reconnects, logouts, query logins */
+ unsigned int access_complete:1;
- /*
- * Pool of command orbs, so we can have more than overlapped command per id
- */
- spinlock_t sbp2_command_orb_lock;
- struct list_head sbp2_command_orb_inuse;
- struct list_head sbp2_command_orb_completed;
+ /* Pool of command ORBs for this logical unit */
+ spinlock_t cmd_orb_lock;
+ struct list_head cmd_orb_inuse;
+ struct list_head cmd_orb_completed;
- struct list_head scsi_list;
+ /* Backlink to FireWire host; list of units attached to the host */
+ struct sbp2_fwhost_info *hi;
+ struct list_head lu_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;
+ struct Scsi_Host *shost;
/* Device specific workarounds/brokeness */
unsigned workarounds;
+ /* Connection state */
atomic_t state;
+
+ /* For deferred requests to the fetch agent */
struct work_struct protocol_work;
};
-/* For use in scsi_id_instance_data.state */
+/* For use in sbp2_lu.state */
enum sbp2lu_state_types {
SBP2LU_STATE_RUNNING, /* all normal */
SBP2LU_STATE_IN_RESET, /* between bus reset and reconnect */
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 sbp2_lu.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
#define SBP2_WORKAROUND_FIX_CAPACITY 0x8
+#define SBP2_WORKAROUND_DELAY_INQUIRY 0x10
+#define SBP2_INQUIRY_DELAY 12
+#define SBP2_WORKAROUND_POWER_CONDITION 0x20
#define SBP2_WORKAROUND_OVERRIDE 0x100
#endif /* SBP2_H */
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