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 #include <linux/bsg-lib.h>
   9
  10 struct scsi_transport_template;
  11 struct sas_rphy;
  12 struct request;
  13
  14 #if !IS_ENABLED(CONFIG_SCSI_SAS_ATTRS)
  15 static inline int scsi_is_sas_rphy(const struct device *sdev)
  16 {
  17         return 0;
  18 }
  19 #else
  20 extern int scsi_is_sas_rphy(const struct device *);
  21 #endif
  22
  23 static inline int sas_protocol_ata(enum sas_protocol proto)
  24 {
  25         return ((proto & SAS_PROTOCOL_SATA) ||
  26                 (proto & SAS_PROTOCOL_STP))? 1 : 0;
  27 }
  28
  29 enum sas_linkrate {
  30         /* These Values are defined in the SAS standard */
  31         SAS_LINK_RATE_UNKNOWN = 0,
  32         SAS_PHY_DISABLED = 1,
  33         SAS_PHY_RESET_PROBLEM = 2,
  34         SAS_SATA_SPINUP_HOLD = 3,
  35         SAS_SATA_PORT_SELECTOR = 4,
  36         SAS_PHY_RESET_IN_PROGRESS = 5,
  37         SAS_LINK_RATE_1_5_GBPS = 8,
  38         SAS_LINK_RATE_G1 = SAS_LINK_RATE_1_5_GBPS,
  39         SAS_LINK_RATE_3_0_GBPS = 9,
  40         SAS_LINK_RATE_G2 = SAS_LINK_RATE_3_0_GBPS,
  41         SAS_LINK_RATE_6_0_GBPS = 10,
  42         SAS_LINK_RATE_12_0_GBPS = 11,
  43         /* These are virtual to the transport class and may never
  44          * be signalled normally since the standard defined field
  45          * is only 4 bits */
  46         SAS_LINK_RATE_FAILED = 0x10,
  47         SAS_PHY_VIRTUAL = 0x11,
  48 };
  49
  50 struct sas_identify {
  51         enum sas_device_type    device_type;
  52         enum sas_protocol       initiator_port_protocols;
  53         enum sas_protocol       target_port_protocols;
  54         u64                     sas_address;
  55         u8                      phy_identifier;
  56 };
  57
  58 struct sas_phy {
  59         struct device           dev;
  60         int                     number;
  61         int                     enabled;
  62
  63         /* phy identification */
  64         struct sas_identify     identify;
  65
  66         /* phy attributes */
  67         enum sas_linkrate       negotiated_linkrate;
  68         enum sas_linkrate       minimum_linkrate_hw;
  69         enum sas_linkrate       minimum_linkrate;
  70         enum sas_linkrate       maximum_linkrate_hw;
  71         enum sas_linkrate       maximum_linkrate;
  72
  73         /* link error statistics */
  74         u32                     invalid_dword_count;
  75         u32                     running_disparity_error_count;
  76         u32                     loss_of_dword_sync_count;
  77         u32                     phy_reset_problem_count;
  78
  79         /* for the list of phys belonging to a port */
  80         struct list_head        port_siblings;
  81
  82         /* available to the lldd */
  83         void                    *hostdata;
  84 };
  85
  86 #define dev_to_phy(d) \
  87         container_of((d), struct sas_phy, dev)
  88 #define transport_class_to_phy(dev) \
  89         dev_to_phy((dev)->parent)
  90 #define phy_to_shost(phy) \
  91         dev_to_shost((phy)->dev.parent)
  92
  93 struct request_queue;
  94 struct sas_rphy {
  95         struct device           dev;
  96         struct sas_identify     identify;
  97         struct list_head        list;
  98         struct request_queue    *q;
  99         u32                     scsi_target_id;
 100 };
 101
 102 #define dev_to_rphy(d) \
 103         container_of((d), struct sas_rphy, dev)
 104 #define transport_class_to_rphy(dev) \
 105         dev_to_rphy((dev)->parent)
 106 #define rphy_to_shost(rphy) \
 107         dev_to_shost((rphy)->dev.parent)
 108 #define target_to_rphy(targ) \
 109         dev_to_rphy((targ)->dev.parent)
 110
 111 struct sas_end_device {
 112         struct sas_rphy         rphy;
 113         /* flags */
 114         unsigned                ready_led_meaning:1;
 115         unsigned                tlr_supported:1;
 116         unsigned                tlr_enabled:1;
 117         /* parameters */
 118         u16                     I_T_nexus_loss_timeout;
 119         u16                     initiator_response_timeout;
 120 };
 121 #define rphy_to_end_device(r) \
 122         container_of((r), struct sas_end_device, rphy)
 123
 124 struct sas_expander_device {
 125         int    level;
 126         int    next_port_id;
 127
 128         #define SAS_EXPANDER_VENDOR_ID_LEN      8
 129         char   vendor_id[SAS_EXPANDER_VENDOR_ID_LEN+1];
 130         #define SAS_EXPANDER_PRODUCT_ID_LEN     16
 131         char   product_id[SAS_EXPANDER_PRODUCT_ID_LEN+1];
 132         #define SAS_EXPANDER_PRODUCT_REV_LEN    4
 133         char   product_rev[SAS_EXPANDER_PRODUCT_REV_LEN+1];
 134         #define SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN    8
 135         char   component_vendor_id[SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN+1];
 136         u16    component_id;
 137         u8     component_revision_id;
 138
 139         struct sas_rphy         rphy;
 140
 141 };
 142 #define rphy_to_expander_device(r) \
 143         container_of((r), struct sas_expander_device, rphy)
 144
 145 struct sas_port {
 146         struct device           dev;
 147
 148         int                     port_identifier;
 149         int                     num_phys;
 150         /* port flags */
 151         unsigned int            is_backlink:1;
 152
 153         /* the other end of the link */
 154         struct sas_rphy         *rphy;
 155
 156         struct mutex            phy_list_mutex;
 157         struct list_head        phy_list;
 158 };
 159
 160 #define dev_to_sas_port(d) \
 161         container_of((d), struct sas_port, dev)
 162 #define transport_class_to_sas_port(dev) \
 163         dev_to_sas_port((dev)->parent)
 164
 165 struct sas_phy_linkrates {
 166         enum sas_linkrate maximum_linkrate;
 167         enum sas_linkrate minimum_linkrate;
 168 };
 169
 170 /* The functions by which the transport class and the driver communicate */
 171 struct sas_function_template {
 172         int (*get_linkerrors)(struct sas_phy *);
 173         int (*get_enclosure_identifier)(struct sas_rphy *, u64 *);
 174         int (*get_bay_identifier)(struct sas_rphy *);
 175         int (*phy_reset)(struct sas_phy *, int);
 176         int (*phy_enable)(struct sas_phy *, int);
 177         int (*phy_setup)(struct sas_phy *);
 178         void (*phy_release)(struct sas_phy *);
 179         int (*set_phy_speed)(struct sas_phy *, struct sas_phy_linkrates *);
 180         void (*smp_handler)(struct bsg_job *, struct Scsi_Host *,
 181                         struct sas_rphy *);
 182 };
 183
 184
 185 void sas_remove_children(struct device *);
 186 extern void sas_remove_host(struct Scsi_Host *);
 187
 188 extern struct sas_phy *sas_phy_alloc(struct device *, int);
 189 extern void sas_phy_free(struct sas_phy *);
 190 extern int sas_phy_add(struct sas_phy *);
 191 extern void sas_phy_delete(struct sas_phy *);
 192 extern int scsi_is_sas_phy(const struct device *);
 193
 194 u64 sas_get_address(struct scsi_device *);
 195 unsigned int sas_tlr_supported(struct scsi_device *);
 196 unsigned int sas_is_tlr_enabled(struct scsi_device *);
 197 void sas_disable_tlr(struct scsi_device *);
 198 void sas_enable_tlr(struct scsi_device *);
 199
 200 extern struct sas_rphy *sas_end_device_alloc(struct sas_port *);
 201 extern struct sas_rphy *sas_expander_alloc(struct sas_port *, enum sas_device_type);
 202 void sas_rphy_free(struct sas_rphy *);
 203 extern int sas_rphy_add(struct sas_rphy *);
 204 extern void sas_rphy_remove(struct sas_rphy *);
 205 extern void sas_rphy_delete(struct sas_rphy *);
 206 extern void sas_rphy_unlink(struct sas_rphy *);
 207
 208 struct sas_port *sas_port_alloc(struct device *, int);
 209 struct sas_port *sas_port_alloc_num(struct device *);
 210 int sas_port_add(struct sas_port *);
 211 void sas_port_free(struct sas_port *);
 212 void sas_port_delete(struct sas_port *);
 213 void sas_port_add_phy(struct sas_port *, struct sas_phy *);
 214 void sas_port_delete_phy(struct sas_port *, struct sas_phy *);
 215 void sas_port_mark_backlink(struct sas_port *);
 216 int scsi_is_sas_port(const struct device *);
 217 struct sas_phy *sas_port_get_phy(struct sas_port *port);
 218 static inline void sas_port_put_phy(struct sas_phy *phy)
 219 {
 220         if (phy)
 221                 put_device(&phy->dev);
 222 }
 223
 224 extern struct scsi_transport_template *
 225 sas_attach_transport(struct sas_function_template *);
 226 extern void sas_release_transport(struct scsi_transport_template *);
 227 int sas_read_port_mode_page(struct scsi_device *);
 228
 229 static inline int
 230 scsi_is_sas_expander_device(struct device *dev)
 231 {
 232         struct sas_rphy *rphy;
 233         if (!scsi_is_sas_rphy(dev))
 234                 return 0;
 235         rphy = dev_to_rphy(dev);
 236         return rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE ||
 237                 rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE;
 238 }
 239
 240 #define scsi_is_sas_phy_local(phy)      scsi_is_host_device((phy)->dev.parent)
 241
 242 #endif /* SCSI_TRANSPORT_SAS_H */