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 #include <linux/mutex.h>
   7
   8 struct scsi_transport_template;
   9 struct sas_rphy;
  10
  11
  12 enum sas_device_type {
  13         SAS_PHY_UNUSED,
  14         SAS_END_DEVICE,
  15         SAS_EDGE_EXPANDER_DEVICE,
  16         SAS_FANOUT_EXPANDER_DEVICE,
  17 };
  18
  19 enum sas_protocol {
  20         SAS_PROTOCOL_SATA               = 0x01,
  21         SAS_PROTOCOL_SMP                = 0x02,
  22         SAS_PROTOCOL_STP                = 0x04,
  23         SAS_PROTOCOL_SSP                = 0x08,
  24 };
  25
  26 enum sas_linkrate {
  27         SAS_LINK_RATE_UNKNOWN,
  28         SAS_PHY_DISABLED,
  29         SAS_LINK_RATE_FAILED,
  30         SAS_SATA_SPINUP_HOLD,
  31         SAS_SATA_PORT_SELECTOR,
  32         SAS_LINK_RATE_1_5_GBPS,
  33         SAS_LINK_RATE_3_0_GBPS,
  34         SAS_LINK_RATE_6_0_GBPS,
  35         SAS_LINK_VIRTUAL,
  36 };
  37
  38 struct sas_identify {
  39         enum sas_device_type    device_type;
  40         enum sas_protocol       initiator_port_protocols;
  41         enum sas_protocol       target_port_protocols;
  42         u64                     sas_address;
  43         u8                      phy_identifier;
  44 };
  45
  46 struct sas_phy {
  47         struct device           dev;
  48         int                     number;
  49
  50         /* phy identification */
  51         struct sas_identify     identify;
  52
  53         /* phy attributes */
  54         enum sas_linkrate       negotiated_linkrate;
  55         enum sas_linkrate       minimum_linkrate_hw;
  56         enum sas_linkrate       minimum_linkrate;
  57         enum sas_linkrate       maximum_linkrate_hw;
  58         enum sas_linkrate       maximum_linkrate;
  59
  60         /* internal state */
  61         unsigned int            local_attached : 1;
  62
  63         /* link error statistics */
  64         u32                     invalid_dword_count;
  65         u32                     running_disparity_error_count;
  66         u32                     loss_of_dword_sync_count;
  67         u32                     phy_reset_problem_count;
  68
  69         /* for the list of phys belonging to a port */
  70         struct list_head        port_siblings;
  71 };
  72
  73 #define dev_to_phy(d) \
  74         container_of((d), struct sas_phy, dev)
  75 #define transport_class_to_phy(cdev) \
  76         dev_to_phy((cdev)->dev)
  77 #define phy_to_shost(phy) \
  78         dev_to_shost((phy)->dev.parent)
  79
  80 struct sas_rphy {
  81         struct device           dev;
  82         struct sas_identify     identify;
  83         struct list_head        list;
  84         u32                     scsi_target_id;
  85 };
  86
  87 #define dev_to_rphy(d) \
  88         container_of((d), struct sas_rphy, dev)
  89 #define transport_class_to_rphy(cdev) \
  90         dev_to_rphy((cdev)->dev)
  91 #define rphy_to_shost(rphy) \
  92         dev_to_shost((rphy)->dev.parent)
  93 #define target_to_rphy(targ) \
  94         dev_to_rphy((targ)->dev.parent)
  95
  96 struct sas_end_device {
  97         struct sas_rphy         rphy;
  98         /* flags */
  99         unsigned                ready_led_meaning:1;
 100         /* parameters */
 101         u16                     I_T_nexus_loss_timeout;
 102         u16                     initiator_response_timeout;
 103 };
 104 #define rphy_to_end_device(r) \
 105         container_of((r), struct sas_end_device, rphy)
 106
 107 struct sas_expander_device {
 108         int    level;
 109         int    next_port_id;
 110
 111         #define SAS_EXPANDER_VENDOR_ID_LEN      8
 112         char   vendor_id[SAS_EXPANDER_VENDOR_ID_LEN+1];
 113         #define SAS_EXPANDER_PRODUCT_ID_LEN     16
 114         char   product_id[SAS_EXPANDER_PRODUCT_ID_LEN+1];
 115         #define SAS_EXPANDER_PRODUCT_REV_LEN    4
 116         char   product_rev[SAS_EXPANDER_PRODUCT_REV_LEN+1];
 117         #define SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN    8
 118         char   component_vendor_id[SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN+1];
 119         u16    component_id;
 120         u8     component_revision_id;
 121
 122         struct sas_rphy         rphy;
 123
 124 };
 125 #define rphy_to_expander_device(r) \
 126         container_of((r), struct sas_expander_device, rphy)
 127
 128 struct sas_port {
 129         struct device           dev;
 130
 131         int                     port_identifier;
 132         int                     num_phys;
 133         /* port flags */
 134         unsigned int            is_backlink:1;
 135
 136         /* the other end of the link */
 137         struct sas_rphy         *rphy;
 138
 139         struct mutex            phy_list_mutex;
 140         struct list_head        phy_list;
 141 };
 142
 143 #define dev_to_sas_port(d) \
 144         container_of((d), struct sas_port, dev)
 145 #define transport_class_to_sas_port(cdev) \
 146         dev_to_sas_port((cdev)->dev)
 147
 148 /* The functions by which the transport class and the driver communicate */
 149 struct sas_function_template {
 150         int (*get_linkerrors)(struct sas_phy *);
 151         int (*get_enclosure_identifier)(struct sas_rphy *, u64 *);
 152         int (*get_bay_identifier)(struct sas_rphy *);
 153         int (*phy_reset)(struct sas_phy *, int);
 154 };
 155
 156
 157 void sas_remove_children(struct device *);
 158 extern void sas_remove_host(struct Scsi_Host *);
 159
 160 extern struct sas_phy *sas_phy_alloc(struct device *, int);
 161 extern void sas_phy_free(struct sas_phy *);
 162 extern int sas_phy_add(struct sas_phy *);
 163 extern void sas_phy_delete(struct sas_phy *);
 164 extern int scsi_is_sas_phy(const struct device *);
 165
 166 extern struct sas_rphy *sas_end_device_alloc(struct sas_port *);
 167 extern struct sas_rphy *sas_expander_alloc(struct sas_port *, enum sas_device_type);
 168 void sas_rphy_free(struct sas_rphy *);
 169 extern int sas_rphy_add(struct sas_rphy *);
 170 extern void sas_rphy_delete(struct sas_rphy *);
 171 extern int scsi_is_sas_rphy(const struct device *);
 172
 173 struct sas_port *sas_port_alloc(struct device *, int);
 174 struct sas_port *sas_port_alloc_num(struct device *);
 175 int sas_port_add(struct sas_port *);
 176 void sas_port_free(struct sas_port *);
 177 void sas_port_delete(struct sas_port *);
 178 void sas_port_add_phy(struct sas_port *, struct sas_phy *);
 179 void sas_port_delete_phy(struct sas_port *, struct sas_phy *);
 180 void sas_port_mark_backlink(struct sas_port *);
 181 int scsi_is_sas_port(const struct device *);
 182
 183 extern struct scsi_transport_template *
 184 sas_attach_transport(struct sas_function_template *);
 185 extern void sas_release_transport(struct scsi_transport_template *);
 186 int sas_read_port_mode_page(struct scsi_device *);
 187
 188 static inline int
 189 scsi_is_sas_expander_device(struct device *dev)
 190 {
 191         struct sas_rphy *rphy;
 192         if (!scsi_is_sas_rphy(dev))
 193                 return 0;
 194         rphy = dev_to_rphy(dev);
 195         return rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE ||
 196                 rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE;
 197 }
 198
 199 #endif /* SCSI_TRANSPORT_SAS_H */