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 */ 221