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 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 88struct request_queue; 89struct 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 106struct sas_end_device { 107 struct sas_rphy rphy; 108 /* flags */ 109 unsigned ready_led_meaning:1; 110 unsigned tlr_supported:1; 111 unsigned tlr_enabled:1; 112 /* parameters */ 113 u16 I_T_nexus_loss_timeout; 114 u16 initiator_response_timeout; 115}; 116#define rphy_to_end_device(r) \ 117 container_of((r), struct sas_end_device, rphy) 118 119struct sas_expander_device { 120 int level; 121 int next_port_id; 122 123 #define SAS_EXPANDER_VENDOR_ID_LEN 8 124 char vendor_id[SAS_EXPANDER_VENDOR_ID_LEN+1]; 125 #define SAS_EXPANDER_PRODUCT_ID_LEN 16 126 char product_id[SAS_EXPANDER_PRODUCT_ID_LEN+1]; 127 #define SAS_EXPANDER_PRODUCT_REV_LEN 4 128 char product_rev[SAS_EXPANDER_PRODUCT_REV_LEN+1]; 129 #define SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN 8 130 char component_vendor_id[SAS_EXPANDER_COMPONENT_VENDOR_ID_LEN+1]; 131 u16 component_id; 132 u8 component_revision_id; 133 134 struct sas_rphy rphy; 135 136}; 137#define rphy_to_expander_device(r) \ 138 container_of((r), struct sas_expander_device, rphy) 139 140struct sas_port { 141 struct device dev; 142 143 int port_identifier; 144 int num_phys; 145 /* port flags */ 146 unsigned int is_backlink:1; 147 148 /* the other end of the link */ 149 struct sas_rphy *rphy; 150 151 struct mutex phy_list_mutex; 152 struct list_head phy_list; 153}; 154 155#define dev_to_sas_port(d) \ 156 container_of((d), struct sas_port, dev) 157#define transport_class_to_sas_port(dev) \ 158 dev_to_sas_port((dev)->parent) 159 160struct sas_phy_linkrates { 161 enum sas_linkrate maximum_linkrate; 162 enum sas_linkrate minimum_linkrate; 163}; 164 165/* The functions by which the transport class and the driver communicate */ 166struct sas_function_template { 167 int (*get_linkerrors)(struct sas_phy *); 168 int (*get_enclosure_identifier)(struct sas_rphy *, u64 *); 169 int (*get_bay_identifier)(struct sas_rphy *); 170 int (*phy_reset)(struct sas_phy *, int); 171 int (*phy_enable)(struct sas_phy *, int); 172 int (*set_phy_speed)(struct sas_phy *, struct sas_phy_linkrates *); 173 int (*smp_handler)(struct Scsi_Host *, struct sas_rphy *, struct request *); 174}; 175 176 177void sas_remove_children(struct device *); 178extern void sas_remove_host(struct Scsi_Host *); 179 180extern struct sas_phy *sas_phy_alloc(struct device *, int); 181extern void sas_phy_free(struct sas_phy *); 182extern int sas_phy_add(struct sas_phy *); 183extern void sas_phy_delete(struct sas_phy *); 184extern int scsi_is_sas_phy(const struct device *); 185 186unsigned int sas_tlr_supported(struct scsi_device *); 187unsigned int sas_is_tlr_enabled(struct scsi_device *); 188void sas_disable_tlr(struct scsi_device *); 189void sas_enable_tlr(struct scsi_device *); 190 191extern struct sas_rphy *sas_end_device_alloc(struct sas_port *); 192extern struct sas_rphy *sas_expander_alloc(struct sas_port *, enum sas_device_type); 193void sas_rphy_free(struct sas_rphy *); 194extern int sas_rphy_add(struct sas_rphy *); 195extern void sas_rphy_remove(struct sas_rphy *); 196extern void sas_rphy_delete(struct sas_rphy *); 197extern int scsi_is_sas_rphy(const struct device *); 198 199struct sas_port *sas_port_alloc(struct device *, int); 200struct sas_port *sas_port_alloc_num(struct device *); 201int sas_port_add(struct sas_port *); 202void sas_port_free(struct sas_port *); 203void sas_port_delete(struct sas_port *); 204void sas_port_add_phy(struct sas_port *, struct sas_phy *); 205void sas_port_delete_phy(struct sas_port *, struct sas_phy *); 206void sas_port_mark_backlink(struct sas_port *); 207int scsi_is_sas_port(const struct device *); 208 209extern struct scsi_transport_template * 210sas_attach_transport(struct sas_function_template *); 211extern void sas_release_transport(struct scsi_transport_template *); 212int sas_read_port_mode_page(struct scsi_device *); 213 214static inline int 215scsi_is_sas_expander_device(struct device *dev) 216{ 217 struct sas_rphy *rphy; 218 if (!scsi_is_sas_rphy(dev)) 219 return 0; 220 rphy = dev_to_rphy(dev); 221 return rphy->identify.device_type == SAS_FANOUT_EXPANDER_DEVICE || 222 rphy->identify.device_type == SAS_EDGE_EXPANDER_DEVICE; 223} 224 225#define scsi_is_sas_phy_local(phy) scsi_is_host_device((phy)->dev.parent) 226 227#endif /* SCSI_TRANSPORT_SAS_H */ 228