include/scsi/scsi_transport_sas.h

   1 #ifndef SCSI_TRANSPORT_SAS_H
   2 #define SCSI_TRANSPORT_SAS_H
   3
   4 #include <linux/transport_class.h>
   5 #include <linux/types.h>
   6
   7 struct scsi_transport_template;
   8 struct sas_rphy;
   9
  10
  11 enum sas_device_type {
  12         SAS_PHY_UNUSED,
  13         SAS_END_DEVICE,
  14         SAS_EDGE_EXPANDER_DEVICE,
  15         SAS_FANOUT_EXPANDER_DEVICE,
  16 };
  17
  18 enum sas_protocol {
  19         SAS_PROTOCOL_SATA               = 0x01,
  20         SAS_PROTOCOL_SMP                = 0x02,
  21         SAS_PROTOCOL_STP                = 0x04,
  22         SAS_PROTOCOL_SSP                = 0x08,
  23 };
  24
  25 enum sas_linkrate {
  26         SAS_LINK_RATE_UNKNOWN,
  27         SAS_PHY_DISABLED,
  28         SAS_LINK_RATE_FAILED,
  29         SAS_SATA_SPINUP_HOLD,
  30         SAS_SATA_PORT_SELECTOR,
  31         SAS_LINK_RATE_1_5_GBPS,
  32         SAS_LINK_RATE_3_0_GBPS,
  33         SAS_LINK_VIRTUAL,
  34 };
  35
  36 struct sas_identify {
  37         enum sas_device_type    device_type;
  38         enum sas_protocol       initiator_port_protocols;
  39         enum sas_protocol       target_port_protocols;
  40         u64                     sas_address;
  41         u8                      phy_identifier;
  42 };
  43
  44 struct sas_phy {
  45         struct device           dev;
  46         int                     number;
  47
  48         /* phy identification */
  49         struct sas_identify     identify;
  50
  51         /* phy attributes */
  52         enum sas_linkrate       negotiated_linkrate;
  53         enum sas_linkrate       minimum_linkrate_hw;
  54         enum sas_linkrate       minimum_linkrate;
  55         enum sas_linkrate       maximum_linkrate_hw;
  56         enum sas_linkrate       maximum_linkrate;
  57         u8                      port_identifier;
  58
  59         /* internal state */
  60         unsigned int            local_attached : 1;
  61
  62         /* link error statistics */
  63         u32                     invalid_dword_count;
  64         u32                     running_disparity_error_count;
  65         u32                     loss_of_dword_sync_count;
  66         u32                     phy_reset_problem_count;
  67
  68         /* the other end of the link */
  69         struct sas_rphy         *rphy;
  70 };
  71
  72 #define dev_to_phy(d) \
  73         container_of((d), struct sas_phy, dev)
  74 #define transport_class_to_phy(cdev) \
  75         dev_to_phy((cdev)->dev)
  76 #define phy_to_shost(phy) \
  77         dev_to_shost((phy)->dev.parent)
  78
  79 struct sas_rphy {
  80         struct device           dev;
  81         struct sas_identify     identify;
  82         struct list_head        list;
  83         u32                     scsi_target_id;
  84 };
  85
  86 #define dev_to_rphy(d) \
  87         container_of((d), struct sas_rphy, dev)
  88 #define transport_class_to_rphy(cdev) \
  89         dev_to_rphy((cdev)->dev)
  90 #define rphy_to_shost(rphy) \
  91         dev_to_shost((rphy)->dev.parent)
  92
  93
  94 /* The functions by which the transport class and the driver communicate */
  95 struct sas_function_template {
  96         int (*get_linkerrors)(struct sas_phy *);
  97         int (*phy_reset)(struct sas_phy *, int);
  98 };
  99
 100
 101 extern void sas_remove_host(struct Scsi_Host *);
 102
 103 extern struct sas_phy *sas_phy_alloc(struct device *, int);
 104 extern void sas_phy_free(struct sas_phy *);
 105 extern int sas_phy_add(struct sas_phy *);
 106 extern void sas_phy_delete(struct sas_phy *);
 107 extern int scsi_is_sas_phy(const struct device *);
 108
 109 extern struct sas_rphy *sas_rphy_alloc(struct sas_phy *);
 110 void sas_rphy_free(struct sas_rphy *);
 111 extern int sas_rphy_add(struct sas_rphy *);
 112 extern void sas_rphy_delete(struct sas_rphy *);
 113 extern int scsi_is_sas_rphy(const struct device *);
 114
 115 extern struct scsi_transport_template *
 116 sas_attach_transport(struct sas_function_template *);
 117 extern void sas_release_transport(struct scsi_transport_template *);
 118
 119 #endif /* SCSI_TRANSPORT_SAS_H */