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 static inline int sas_protocol_ata(enum sas_protocol proto)
  14 {
  15         return ((proto & SAS_PROTOCOL_SATA) ||
  16                 (proto & SAS_PROTOCOL_STP))? 1 : 0;
  17 }
  18
  19 enum sas_linkrate {
  20         /* These Values are defined in the SAS standard */
  21         SAS_LINK_RATE_UNKNOWN = 0,
  22         SAS_PHY_DISABLED = 1,
  23         SAS_PHY_RESET_PROBLEM = 2,
  24         SAS_SATA_SPINUP_HOLD = 3,
  25         SAS_SATA_PORT_SELECTOR = 4,
  26         SAS_PHY_RESET_IN_PROGRESS = 5,
  27         SAS_LINK_RATE_1_5_GBPS = 8,
  28         SAS_LINK_RATE_G1 = SAS_LINK_RATE_1_5_GBPS,
  29         SAS_LINK_RATE_3_0_GBPS = 9,
  30         SAS_LINK_RATE_G2 = SAS_LINK_RATE_3_0_GBPS,
  31         SAS_LINK_RATE_6_0_GBPS = 10,
  32         SAS_LINK_RATE_12_0_GBPS = 11,
  33         /* These are virtual to the transport class and may never
  34          * be signalled normally since the standard defined field
  35          * is only 4 bits */
  36         SAS_LINK_RATE_FAILED = 0x10,
  37         SAS_PHY_VIRTUAL = 0x11,
  38 };
  39
  40 struct sas_identify {
  41         enum sas_device_type    device_type;
  42         enum sas_protocol       initiator_port_protocols;
  43         enum sas_protocol       target_port_protocols;
  44         u64                     sas_address;
  45         u8                      phy_identifier;
  46 };
  47
  48 struct sas_phy {
  49         struct device           dev;
  50         int                     number;
  51         int                     enabled;
  52
  53         /* phy identification */
  54         struct sas_identify     identify;
  55
  56         /* phy attributes */
  57         enum sas_linkrate       negotiated_linkrate;
  58         enum sas_linkrate       minimum_linkrate_hw;
  59         enum sas_linkrate       minimum_linkrate;
  60         enum sas_linkrate       maximum_linkrate_hw;
  61         enum sas_linkrate       maximum_linkrate;
  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         /* available to the lldd */
  73         void                    *hostdata;
  74 };
  75
  76 #define dev_to_phy(d) \
  77         container_of((d), struct sas_phy, dev)
  78 #define transport_class_to_phy(dev) \
  79         dev_to_phy((dev)->parent)
  80 #define phy_to_shost(phy) \
  81         dev_to_shost((phy)->dev.parent)
  82
  83 struct request_queue;
  84 struct sas_rphy {
  85         struct device           dev;
  86         struct sas_identify     identify;
  87         struct list_head        list;
  88         struct request_queue    *q;
  89         u32                     scsi_target_id;
  90 };
  91
  92 #define dev_to_rphy(d) \
  93         container_of((d), struct sas_rphy, dev)
  94 #define transport_class_to_rphy(dev) \
  95         dev_to_rphy((dev)->parent)
  96 #define rphy_to_shost(rphy) \
  97         dev_to_shost((rphy)->dev.parent)
  98 #define target_to_rphy(targ) \
  99         dev_to_rphy((targ)->dev.parent)
 100
 101 struct sas_end_device {
 102         struct sas_rphy         rphy;
 103         /* flags */
 104         unsigned                ready_led_meaning:1;
 105         unsigned                tlr_supported:1;
 106         unsigned                tlr_enabled:1;
 107         /* parameters */
 108         u16                     I_T_nexus_loss_timeout;
 109         u16                     initiator_response_timeout;
 110 };
 111 #define rphy_to_end_device(r) \
 112         container_of((r), struct sas_end_device, rphy)
 113
 114 struct sas_expander_device {
 115         int    level;
 116         int    next_port_id;
 117
 118         #define SAS_EXPANDER_VENDOR_ID_LEN      8
 119         char   vendor_id[SAS_EXPANDER_VENDOR_ID_LEN+1];
 120         #define SAS_EXPANDER_PRODUCT_ID_LEN     16
 121         char   product_id[SAS_EXPANDER_PRODUCT_ID_LEN+1];
 122         #define SAS_EXPANDER_PRODUCT_REV_LEN    4
 123         char   product_rev[SAS_EXPANDER_PRODUCT_REV_LEN+1];
 124         #define SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN    8
 125         char   component_vendor_id[SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN+1];
 126         u16    component_id;
 127         u8     component_revision_id;
 128
 129         struct sas_rphy         rphy;
 130
 131 };
 132 #define rphy_to_expander_device(r) \
 133         container_of((r), struct sas_expander_device, rphy)
 134
 135 struct sas_port {
 136         struct device           dev;
 137
 138         int                     port_identifier;
 139         int                     num_phys;
 140         /* port flags */
 141         unsigned int            is_backlink:1;
 142
 143         /* the other end of the link */
 144         struct sas_rphy         *rphy;
 145
 146         struct mutex            phy_list_mutex;
 147         struct list_head        phy_list;
 148 };
 149
 150 #define dev_to_sas_port(d) \
 151         container_of((d), struct sas_port, dev)
 152 #define transport_class_to_sas_port(dev) \
 153         dev_to_sas_port((dev)->parent)
 154
 155 struct sas_phy_linkrates {
 156         enum sas_linkrate maximum_linkrate;
 157         enum sas_linkrate minimum_linkrate;
 158 };
 159
 160 /* The functions by which the transport class and the driver communicate */
 161 struct sas_function_template {
 162         int (*get_linkerrors)(struct sas_phy *);
 163         int (*get_enclosure_identifier)(struct sas_rphy *, u64 *);
 164         int (*get_bay_identifier)(struct sas_rphy *);
 165         int (*phy_reset)(struct sas_phy *, int);
 166         int (*phy_enable)(struct sas_phy *, int);
 167         int (*phy_setup)(struct sas_phy *);
 168         void (*phy_release)(struct sas_phy *);
 169         int (*set_phy_speed)(struct sas_phy *, struct sas_phy_linkrates *);
 170         int (*smp_handler)(struct Scsi_Host *, struct sas_rphy *, struct request *);
 171 };
 172
 173
 174 void sas_remove_children(struct device *);
 175 extern void sas_remove_host(struct Scsi_Host *);
 176
 177 extern struct sas_phy *sas_phy_alloc(struct device *, int);
 178 extern void sas_phy_free(struct sas_phy *);
 179 extern int sas_phy_add(struct sas_phy *);
 180 extern void sas_phy_delete(struct sas_phy *);
 181 extern int scsi_is_sas_phy(const struct device *);
 182
 183 unsigned int sas_tlr_supported(struct scsi_device *);
 184 unsigned int sas_is_tlr_enabled(struct scsi_device *);
 185 void sas_disable_tlr(struct scsi_device *);
 186 void sas_enable_tlr(struct scsi_device *);
 187
 188 extern struct sas_rphy *sas_end_device_alloc(struct sas_port *);
 189 extern struct sas_rphy *sas_expander_alloc(struct sas_port *, enum sas_device_type);
 190 void sas_rphy_free(struct sas_rphy *);
 191 extern int sas_rphy_add(struct sas_rphy *);
 192 extern void sas_rphy_remove(struct sas_rphy *);
 193 extern void sas_rphy_delete(struct sas_rphy *);
 194 extern void sas_rphy_unlink(struct sas_rphy *);
 195 extern int scsi_is_sas_rphy(const struct device *);
 196
 197 struct sas_port *sas_port_alloc(struct device *, int);
 198 struct sas_port *sas_port_alloc_num(struct device *);
 199 int sas_port_add(struct sas_port *);
 200 void sas_port_free(struct sas_port *);
 201 void sas_port_delete(struct sas_port *);
 202 void sas_port_add_phy(struct sas_port *, struct sas_phy *);
 203 void sas_port_delete_phy(struct sas_port *, struct sas_phy *);
 204 void sas_port_mark_backlink(struct sas_port *);
 205 int scsi_is_sas_port(const struct device *);
 206 struct sas_phy *sas_port_get_phy(struct sas_port *port);
 207 static inline void sas_port_put_phy(struct sas_phy *phy)
 208 {
 209         if (phy)
 210                 put_device(&phy->dev);
 211 }
 212
 213 extern struct scsi_transport_template *
 214 sas_attach_transport(struct sas_function_template *);
 215 extern void sas_release_transport(struct scsi_transport_template *);
 216 int sas_read_port_mode_page(struct scsi_device *);
 217
 218 static inline int
 219 scsi_is_sas_expander_device(struct device *dev)
 220 {
 221         struct sas_rphy *rphy;
 222         if (!scsi_is_sas_rphy(dev))
 223                 return 0;
 224         rphy = dev_to_rphy(dev);
 225         return rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE ||
 226                 rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE;
 227 }
 228
 229 #define scsi_is_sas_phy_local(phy)      scsi_is_host_device((phy)->dev.parent)
 230
 231 #endif /* SCSI_TRANSPORT_SAS_H */