linux/include/scsi/scsi_transport_sas.h
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   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
   9struct scsi_transport_template;
  10struct sas_rphy;
  11struct request;
  12
  13enum 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
  20static 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
  26enum 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
  46struct 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
  54struct 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        /* available to the lldd */
  79        void                    *hostdata;
  80};
  81
  82#define dev_to_phy(d) \
  83        container_of((d), struct sas_phy, dev)
  84#define transport_class_to_phy(dev) \
  85        dev_to_phy((dev)->parent)
  86#define phy_to_shost(phy) \
  87        dev_to_shost((phy)->dev.parent)
  88
  89struct request_queue;
  90struct sas_rphy {
  91        struct device           dev;
  92        struct sas_identify     identify;
  93        struct list_head        list;
  94        struct request_queue    *q;
  95        u32                     scsi_target_id;
  96};
  97
  98#define dev_to_rphy(d) \
  99        container_of((d), struct sas_rphy, dev)
 100#define transport_class_to_rphy(dev) \
 101        dev_to_rphy((dev)->parent)
 102#define rphy_to_shost(rphy) \
 103        dev_to_shost((rphy)->dev.parent)
 104#define target_to_rphy(targ) \
 105        dev_to_rphy((targ)->dev.parent)
 106
 107struct sas_end_device {
 108        struct sas_rphy         rphy;
 109        /* flags */
 110        unsigned                ready_led_meaning:1;
 111        unsigned                tlr_supported:1;
 112        unsigned                tlr_enabled:1;
 113        /* parameters */
 114        u16                     I_T_nexus_loss_timeout;
 115        u16                     initiator_response_timeout;
 116};
 117#define rphy_to_end_device(r) \
 118        container_of((r), struct sas_end_device, rphy)
 119
 120struct sas_expander_device {
 121        int    level;
 122        int    next_port_id;
 123
 124        #define SAS_EXPANDER_VENDOR_ID_LEN      8
 125        char   vendor_id[SAS_EXPANDER_VENDOR_ID_LEN+1];
 126        #define SAS_EXPANDER_PRODUCT_ID_LEN     16
 127        char   product_id[SAS_EXPANDER_PRODUCT_ID_LEN+1];
 128        #define SAS_EXPANDER_PRODUCT_REV_LEN    4
 129        char   product_rev[SAS_EXPANDER_PRODUCT_REV_LEN+1];
 130        #define SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN    8
 131        char   component_vendor_id[SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN+1];
 132        u16    component_id;
 133        u8     component_revision_id;
 134
 135        struct sas_rphy         rphy;
 136
 137};
 138#define rphy_to_expander_device(r) \
 139        container_of((r), struct sas_expander_device, rphy)
 140
 141struct sas_port {
 142        struct device           dev;
 143
 144        int                     port_identifier;
 145        int                     num_phys;
 146        /* port flags */
 147        unsigned int            is_backlink:1;
 148
 149        /* the other end of the link */
 150        struct sas_rphy         *rphy;
 151
 152        struct mutex            phy_list_mutex;
 153        struct list_head        phy_list;
 154};
 155
 156#define dev_to_sas_port(d) \
 157        container_of((d), struct sas_port, dev)
 158#define transport_class_to_sas_port(dev) \
 159        dev_to_sas_port((dev)->parent)
 160
 161struct sas_phy_linkrates {
 162        enum sas_linkrate maximum_linkrate;
 163        enum sas_linkrate minimum_linkrate;
 164};
 165
 166/* The functions by which the transport class and the driver communicate */
 167struct sas_function_template {
 168        int (*get_linkerrors)(struct sas_phy *);
 169        int (*get_enclosure_identifier)(struct sas_rphy *, u64 *);
 170        int (*get_bay_identifier)(struct sas_rphy *);
 171        int (*phy_reset)(struct sas_phy *, int);
 172        int (*phy_enable)(struct sas_phy *, int);
 173        int (*phy_setup)(struct sas_phy *);
 174        void (*phy_release)(struct sas_phy *);
 175        int (*set_phy_speed)(struct sas_phy *, struct sas_phy_linkrates *);
 176        int (*smp_handler)(struct Scsi_Host *, struct sas_rphy *, struct request *);
 177};
 178
 179
 180void sas_remove_children(struct device *);
 181extern void sas_remove_host(struct Scsi_Host *);
 182
 183extern struct sas_phy *sas_phy_alloc(struct device *, int);
 184extern void sas_phy_free(struct sas_phy *);
 185extern int sas_phy_add(struct sas_phy *);
 186extern void sas_phy_delete(struct sas_phy *);
 187extern int scsi_is_sas_phy(const struct device *);
 188
 189unsigned int sas_tlr_supported(struct scsi_device *);
 190unsigned int sas_is_tlr_enabled(struct scsi_device *);
 191void sas_disable_tlr(struct scsi_device *);
 192void sas_enable_tlr(struct scsi_device *);
 193
 194extern struct sas_rphy *sas_end_device_alloc(struct sas_port *);
 195extern struct sas_rphy *sas_expander_alloc(struct sas_port *, enum sas_device_type);
 196void sas_rphy_free(struct sas_rphy *);
 197extern int sas_rphy_add(struct sas_rphy *);
 198extern void sas_rphy_remove(struct sas_rphy *);
 199extern void sas_rphy_delete(struct sas_rphy *);
 200extern void sas_rphy_unlink(struct sas_rphy *);
 201extern int scsi_is_sas_rphy(const struct device *);
 202
 203struct sas_port *sas_port_alloc(struct device *, int);
 204struct sas_port *sas_port_alloc_num(struct device *);
 205int sas_port_add(struct sas_port *);
 206void sas_port_free(struct sas_port *);
 207void sas_port_delete(struct sas_port *);
 208void sas_port_add_phy(struct sas_port *, struct sas_phy *);
 209void sas_port_delete_phy(struct sas_port *, struct sas_phy *);
 210void sas_port_mark_backlink(struct sas_port *);
 211int scsi_is_sas_port(const struct device *);
 212struct sas_phy *sas_port_get_phy(struct sas_port *port);
 213static inline void sas_port_put_phy(struct sas_phy *phy)
 214{
 215        if (phy)
 216                put_device(&phy->dev);
 217}
 218
 219extern struct scsi_transport_template *
 220sas_attach_transport(struct sas_function_template *);
 221extern void sas_release_transport(struct scsi_transport_template *);
 222int sas_read_port_mode_page(struct scsi_device *);
 223
 224static inline int
 225scsi_is_sas_expander_device(struct device *dev)
 226{
 227        struct sas_rphy *rphy;
 228        if (!scsi_is_sas_rphy(dev))
 229                return 0;
 230        rphy = dev_to_rphy(dev);
 231        return rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE ||
 232                rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE;
 233}
 234
 235#define scsi_is_sas_phy_local(phy)      scsi_is_host_device((phy)->dev.parent)
 236
 237#endif /* SCSI_TRANSPORT_SAS_H */
 238
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