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(cdev) \
84 dev_to_phy((cdev)->dev)
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(cdev) \
100 dev_to_rphy((cdev)->dev)
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(cdev) \
156 dev_to_sas_port((cdev)->dev)
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
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