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 #include <scsi/sas.h>
   8
   9 struct scsi_transport_template;
  10 struct sas_rphy;
  11 struct request;
  12
  13 enum sas_device_type {
  14         SAS_PHY_UNUSED = 0,
  15         SAS_END_DEVICE = 1,
  16         SAS_EDGE_EXPANDER_DEVICE = 2,
  17         SAS_FANOUT_EXPANDER_DEVICE = 3,
  18 };
  19
  20 static inline int sas_protocol_ata(enum sas_protocol proto)
  21 {
  22         return ((proto & SAS_PROTOCOL_SATA) ||
  23                 (proto & SAS_PROTOCOL_STP))? 1 : 0;
  24 }
  25
  26 enum sas_linkrate {
  27         /* These Values are defined in the SAS standard */
  28         SAS_LINK_RATE_UNKNOWN = 0,
  29         SAS_PHY_DISABLED = 1,
  30         SAS_PHY_RESET_PROBLEM = 2,
  31         SAS_SATA_SPINUP_HOLD = 3,
  32         SAS_SATA_PORT_SELECTOR = 4,
  33         SAS_PHY_RESET_IN_PROGRESS = 5,
  34         SAS_LINK_RATE_1_5_GBPS = 8,
  35         SAS_LINK_RATE_G1 = SAS_LINK_RATE_1_5_GBPS,
  36         SAS_LINK_RATE_3_0_GBPS = 9,
  37         SAS_LINK_RATE_G2 = SAS_LINK_RATE_3_0_GBPS,
  38         SAS_LINK_RATE_6_0_GBPS = 10,
  39         /* These are virtual to the transport class and may never
  40          * be signalled normally since the standard defined field
  41          * is only 4 bits */
  42         SAS_LINK_RATE_FAILED = 0x10,
  43         SAS_PHY_VIRTUAL = 0x11,
  44 };
  45
  46 struct sas_identify {
  47         enum sas_device_type    device_type;
  48         enum sas_protocol       initiator_port_protocols;
  49         enum sas_protocol       target_port_protocols;
  50         u64                     sas_address;
  51         u8                      phy_identifier;
  52 };
  53
  54 struct sas_phy {
  55         struct device           dev;
  56         int                     number;
  57         int                     enabled;
  58
  59         /* phy identification */
  60         struct sas_identify     identify;
  61
  62         /* phy attributes */
  63         enum sas_linkrate       negotiated_linkrate;
  64         enum sas_linkrate       minimum_linkrate_hw;
  65         enum sas_linkrate       minimum_linkrate;
  66         enum sas_linkrate       maximum_linkrate_hw;
  67         enum sas_linkrate       maximum_linkrate;
  68
  69         /* link error statistics */
  70         u32                     invalid_dword_count;
  71         u32                     running_disparity_error_count;
  72         u32                     loss_of_dword_sync_count;
  73         u32                     phy_reset_problem_count;
  74
  75         /* for the list of phys belonging to a port */
  76         struct list_head        port_siblings;
  77
  78         struct work_struct      reset_work;
  79 };
  80
  81 #define dev_to_phy(d) \
  82         container_of((d), struct sas_phy, dev)
  83 #define transport_class_to_phy(dev) \
  84         dev_to_phy((dev)->parent)
  85 #define phy_to_shost(phy) \
  86         dev_to_shost((phy)->dev.parent)
  87
  88 struct request_queue;
  89 struct sas_rphy {
  90         struct device           dev;
  91         struct sas_identify     identify;
  92         struct list_head        list;
  93         struct request_queue    *q;
  94         u32                     scsi_target_id;
  95 };
  96
  97 #define dev_to_rphy(d) \
  98         container_of((d), struct sas_rphy, dev)
  99 #define transport_class_to_rphy(dev) \
 100         dev_to_rphy((dev)->parent)
 101 #define rphy_to_shost(rphy) \
 102         dev_to_shost((rphy)->dev.parent)
 103 #define target_to_rphy(targ) \
 104         dev_to_rphy((targ)->dev.parent)
 105
 106 struct sas_end_device {
 107         struct sas_rphy         rphy;
 108         /* flags */
 109         unsigned                ready_led_meaning:1;
 110         /* parameters */
 111         u16                     I_T_nexus_loss_timeout;
 112         u16                     initiator_response_timeout;
 113 };
 114 #define rphy_to_end_device(r) \
 115         container_of((r), struct sas_end_device, rphy)
 116
 117 struct sas_expander_device {
 118         int    level;
 119         int    next_port_id;
 120
 121         #define SAS_EXPANDER_VENDOR_ID_LEN      8
 122         char   vendor_id[SAS_EXPANDER_VENDOR_ID_LEN+1];
 123         #define SAS_EXPANDER_PRODUCT_ID_LEN     16
 124         char   product_id[SAS_EXPANDER_PRODUCT_ID_LEN+1];
 125         #define SAS_EXPANDER_PRODUCT_REV_LEN    4
 126         char   product_rev[SAS_EXPANDER_PRODUCT_REV_LEN+1];
 127         #define SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN    8
 128         char   component_vendor_id[SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN+1];
 129         u16    component_id;
 130         u8     component_revision_id;
 131
 132         struct sas_rphy         rphy;
 133
 134 };
 135 #define rphy_to_expander_device(r) \
 136         container_of((r), struct sas_expander_device, rphy)
 137
 138 struct sas_port {
 139         struct device           dev;
 140
 141         int                     port_identifier;
 142         int                     num_phys;
 143         /* port flags */
 144         unsigned int            is_backlink:1;
 145
 146         /* the other end of the link */
 147         struct sas_rphy         *rphy;
 148
 149         struct mutex            phy_list_mutex;
 150         struct list_head        phy_list;
 151 };
 152
 153 #define dev_to_sas_port(d) \
 154         container_of((d), struct sas_port, dev)
 155 #define transport_class_to_sas_port(dev) \
 156         dev_to_sas_port((dev)->parent)
 157
 158 struct sas_phy_linkrates {
 159         enum sas_linkrate maximum_linkrate;
 160         enum sas_linkrate minimum_linkrate;
 161 };
 162
 163 /* The functions by which the transport class and the driver communicate */
 164 struct sas_function_template {
 165         int (*get_linkerrors)(struct sas_phy *);
 166         int (*get_enclosure_identifier)(struct sas_rphy *, u64 *);
 167         int (*get_bay_identifier)(struct sas_rphy *);
 168         int (*phy_reset)(struct sas_phy *, int);
 169         int (*phy_enable)(struct sas_phy *, int);
 170         int (*set_phy_speed)(struct sas_phy *, struct sas_phy_linkrates *);
 171         int (*smp_handler)(struct Scsi_Host *, struct sas_rphy *, struct request *);
 172 };
 173
 174
 175 void sas_remove_children(struct device *);
 176 extern void sas_remove_host(struct Scsi_Host *);
 177
 178 extern struct sas_phy *sas_phy_alloc(struct device *, int);
 179 extern void sas_phy_free(struct sas_phy *);
 180 extern int sas_phy_add(struct sas_phy *);
 181 extern void sas_phy_delete(struct sas_phy *);
 182 extern int scsi_is_sas_phy(const struct device *);
 183
 184 extern struct sas_rphy *sas_end_device_alloc(struct sas_port *);
 185 extern struct sas_rphy *sas_expander_alloc(struct sas_port *, enum sas_device_type);
 186 void sas_rphy_free(struct sas_rphy *);
 187 extern int sas_rphy_add(struct sas_rphy *);
 188 extern void sas_rphy_remove(struct sas_rphy *);
 189 extern void sas_rphy_delete(struct sas_rphy *);
 190 extern int scsi_is_sas_rphy(const struct device *);
 191
 192 struct sas_port *sas_port_alloc(struct device *, int);
 193 struct sas_port *sas_port_alloc_num(struct device *);
 194 int sas_port_add(struct sas_port *);
 195 void sas_port_free(struct sas_port *);
 196 void sas_port_delete(struct sas_port *);
 197 void sas_port_add_phy(struct sas_port *, struct sas_phy *);
 198 void sas_port_delete_phy(struct sas_port *, struct sas_phy *);
 199 void sas_port_mark_backlink(struct sas_port *);
 200 int scsi_is_sas_port(const struct device *);
 201
 202 extern struct scsi_transport_template *
 203 sas_attach_transport(struct sas_function_template *);
 204 extern void sas_release_transport(struct scsi_transport_template *);
 205 int sas_read_port_mode_page(struct scsi_device *);
 206
 207 static inline int
 208 scsi_is_sas_expander_device(struct device *dev)
 209 {
 210         struct sas_rphy *rphy;
 211         if (!scsi_is_sas_rphy(dev))
 212                 return 0;
 213         rphy = dev_to_rphy(dev);
 214         return rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE ||
 215                 rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE;
 216 }
 217
 218 #define scsi_is_sas_phy_local(phy)      scsi_is_host_device((phy)->dev.parent)
 219
 220 #endif /* SCSI_TRANSPORT_SAS_H */