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 #if !IS_ENABLED(CONFIG_SCSI_SAS_ATTRS)
  14 static inline int scsi_is_sas_rphy(const struct device *sdev)
  15 {
  16         return 0;
  17 }
  18 #else
  19 extern int scsi_is_sas_rphy(const struct device *);
  20 #endif
  21
  22 static inline int sas_protocol_ata(enum sas_protocol proto)
  23 {
  24         return ((proto & SAS_PROTOCOL_SATA) ||
  25                 (proto & SAS_PROTOCOL_STP))? 1 : 0;
  26 }
  27
  28 enum sas_linkrate {
  29         /* These Values are defined in the SAS standard */
  30         SAS_LINK_RATE_UNKNOWN = 0,
  31         SAS_PHY_DISABLED = 1,
  32         SAS_PHY_RESET_PROBLEM = 2,
  33         SAS_SATA_SPINUP_HOLD = 3,
  34         SAS_SATA_PORT_SELECTOR = 4,
  35         SAS_PHY_RESET_IN_PROGRESS = 5,
  36         SAS_LINK_RATE_1_5_GBPS = 8,
  37         SAS_LINK_RATE_G1 = SAS_LINK_RATE_1_5_GBPS,
  38         SAS_LINK_RATE_3_0_GBPS = 9,
  39         SAS_LINK_RATE_G2 = SAS_LINK_RATE_3_0_GBPS,
  40         SAS_LINK_RATE_6_0_GBPS = 10,
  41         SAS_LINK_RATE_12_0_GBPS = 11,
  42         /* These are virtual to the transport class and may never
  43          * be signalled normally since the standard defined field
  44          * is only 4 bits */
  45         SAS_LINK_RATE_FAILED = 0x10,
  46         SAS_PHY_VIRTUAL = 0x11,
  47 };
  48
  49 struct sas_identify {
  50         enum sas_device_type    device_type;
  51         enum sas_protocol       initiator_port_protocols;
  52         enum sas_protocol       target_port_protocols;
  53         u64                     sas_address;
  54         u8                      phy_identifier;
  55 };
  56
  57 struct sas_phy {
  58         struct device           dev;
  59         int                     number;
  60         int                     enabled;
  61
  62         /* phy identification */
  63         struct sas_identify     identify;
  64
  65         /* phy attributes */
  66         enum sas_linkrate       negotiated_linkrate;
  67         enum sas_linkrate       minimum_linkrate_hw;
  68         enum sas_linkrate       minimum_linkrate;
  69         enum sas_linkrate       maximum_linkrate_hw;
  70         enum sas_linkrate       maximum_linkrate;
  71
  72         /* link error statistics */
  73         u32                     invalid_dword_count;
  74         u32                     running_disparity_error_count;
  75         u32                     loss_of_dword_sync_count;
  76         u32                     phy_reset_problem_count;
  77
  78         /* for the list of phys belonging to a port */
  79         struct list_head        port_siblings;
  80
  81         /* available to the lldd */
  82         void                    *hostdata;
  83 };
  84
  85 #define dev_to_phy(d) \
  86         container_of((d), struct sas_phy, dev)
  87 #define transport_class_to_phy(dev) \
  88         dev_to_phy((dev)->parent)
  89 #define phy_to_shost(phy) \
  90         dev_to_shost((phy)->dev.parent)
  91
  92 struct request_queue;
  93 struct sas_rphy {
  94         struct device           dev;
  95         struct sas_identify     identify;
  96         struct list_head        list;
  97         struct request_queue    *q;
  98         u32                     scsi_target_id;
  99 };
 100
 101 #define dev_to_rphy(d) \
 102         container_of((d), struct sas_rphy, dev)
 103 #define transport_class_to_rphy(dev) \
 104         dev_to_rphy((dev)->parent)
 105 #define rphy_to_shost(rphy) \
 106         dev_to_shost((rphy)->dev.parent)
 107 #define target_to_rphy(targ) \
 108         dev_to_rphy((targ)->dev.parent)
 109
 110 struct sas_end_device {
 111         struct sas_rphy         rphy;
 112         /* flags */
 113         unsigned                ready_led_meaning:1;
 114         unsigned                tlr_supported:1;
 115         unsigned                tlr_enabled:1;
 116         /* parameters */
 117         u16                     I_T_nexus_loss_timeout;
 118         u16                     initiator_response_timeout;
 119 };
 120 #define rphy_to_end_device(r) \
 121         container_of((r), struct sas_end_device, rphy)
 122
 123 struct sas_expander_device {
 124         int    level;
 125         int    next_port_id;
 126
 127         #define SAS_EXPANDER_VENDOR_ID_LEN      8
 128         char   vendor_id[SAS_EXPANDER_VENDOR_ID_LEN+1];
 129         #define SAS_EXPANDER_PRODUCT_ID_LEN     16
 130         char   product_id[SAS_EXPANDER_PRODUCT_ID_LEN+1];
 131         #define SAS_EXPANDER_PRODUCT_REV_LEN    4
 132         char   product_rev[SAS_EXPANDER_PRODUCT_REV_LEN+1];
 133         #define SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN    8
 134         char   component_vendor_id[SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN+1];
 135         u16    component_id;
 136         u8     component_revision_id;
 137
 138         struct sas_rphy         rphy;
 139
 140 };
 141 #define rphy_to_expander_device(r) \
 142         container_of((r), struct sas_expander_device, rphy)
 143
 144 struct sas_port {
 145         struct device           dev;
 146
 147         int                     port_identifier;
 148         int                     num_phys;
 149         /* port flags */
 150         unsigned int            is_backlink:1;
 151
 152         /* the other end of the link */
 153         struct sas_rphy         *rphy;
 154
 155         struct mutex            phy_list_mutex;
 156         struct list_head        phy_list;
 157 };
 158
 159 #define dev_to_sas_port(d) \
 160         container_of((d), struct sas_port, dev)
 161 #define transport_class_to_sas_port(dev) \
 162         dev_to_sas_port((dev)->parent)
 163
 164 struct sas_phy_linkrates {
 165         enum sas_linkrate maximum_linkrate;
 166         enum sas_linkrate minimum_linkrate;
 167 };
 168
 169 /* The functions by which the transport class and the driver communicate */
 170 struct sas_function_template {
 171         int (*get_linkerrors)(struct sas_phy *);
 172         int (*get_enclosure_identifier)(struct sas_rphy *, u64 *);
 173         int (*get_bay_identifier)(struct sas_rphy *);
 174         int (*phy_reset)(struct sas_phy *, int);
 175         int (*phy_enable)(struct sas_phy *, int);
 176         int (*phy_setup)(struct sas_phy *);
 177         void (*phy_release)(struct sas_phy *);
 178         int (*set_phy_speed)(struct sas_phy *, struct sas_phy_linkrates *);
 179         int (*smp_handler)(struct Scsi_Host *, struct sas_rphy *, struct request *);
 180 };
 181
 182
 183 void sas_remove_children(struct device *);
 184 extern void sas_remove_host(struct Scsi_Host *);
 185
 186 extern struct sas_phy *sas_phy_alloc(struct device *, int);
 187 extern void sas_phy_free(struct sas_phy *);
 188 extern int sas_phy_add(struct sas_phy *);
 189 extern void sas_phy_delete(struct sas_phy *);
 190 extern int scsi_is_sas_phy(const struct device *);
 191
 192 u64 sas_get_address(struct scsi_device *);
 193 unsigned int sas_tlr_supported(struct scsi_device *);
 194 unsigned int sas_is_tlr_enabled(struct scsi_device *);
 195 void sas_disable_tlr(struct scsi_device *);
 196 void sas_enable_tlr(struct scsi_device *);
 197
 198 extern struct sas_rphy *sas_end_device_alloc(struct sas_port *);
 199 extern struct sas_rphy *sas_expander_alloc(struct sas_port *, enum sas_device_type);
 200 void sas_rphy_free(struct sas_rphy *);
 201 extern int sas_rphy_add(struct sas_rphy *);
 202 extern void sas_rphy_remove(struct sas_rphy *);
 203 extern void sas_rphy_delete(struct sas_rphy *);
 204 extern void sas_rphy_unlink(struct sas_rphy *);
 205
 206 struct sas_port *sas_port_alloc(struct device *, int);
 207 struct sas_port *sas_port_alloc_num(struct device *);
 208 int sas_port_add(struct sas_port *);
 209 void sas_port_free(struct sas_port *);
 210 void sas_port_delete(struct sas_port *);
 211 void sas_port_add_phy(struct sas_port *, struct sas_phy *);
 212 void sas_port_delete_phy(struct sas_port *, struct sas_phy *);
 213 void sas_port_mark_backlink(struct sas_port *);
 214 int scsi_is_sas_port(const struct device *);
 215 struct sas_phy *sas_port_get_phy(struct sas_port *port);
 216 static inline void sas_port_put_phy(struct sas_phy *phy)
 217 {
 218         if (phy)
 219                 put_device(&phy->dev);
 220 }
 221
 222 extern struct scsi_transport_template *
 223 sas_attach_transport(struct sas_function_template *);
 224 extern void sas_release_transport(struct scsi_transport_template *);
 225 int sas_read_port_mode_page(struct scsi_device *);
 226
 227 static inline int
 228 scsi_is_sas_expander_device(struct device *dev)
 229 {
 230         struct sas_rphy *rphy;
 231         if (!scsi_is_sas_rphy(dev))
 232                 return 0;
 233         rphy = dev_to_rphy(dev);
 234         return rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE ||
 235                 rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE;
 236 }
 237
 238 #define scsi_is_sas_phy_local(phy)      scsi_is_host_device((phy)->dev.parent)
 239
 240 #endif /* SCSI_TRANSPORT_SAS_H */