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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 | |
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 | 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 | |
119 | struct 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 | |
140 | struct 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 | |
160 | struct 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 */ |
166 | struct 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 | |
177 | void sas_remove_children(struct device *); |
178 | extern void sas_remove_host(struct Scsi_Host *); |
179 | |
180 | extern struct sas_phy *sas_phy_alloc(struct device *, int); |
181 | extern void sas_phy_free(struct sas_phy *); |
182 | extern int sas_phy_add(struct sas_phy *); |
183 | extern void sas_phy_delete(struct sas_phy *); |
184 | extern int scsi_is_sas_phy(const struct device *); |
185 | |
186 | unsigned int sas_tlr_supported(struct scsi_device *); |
187 | unsigned int sas_is_tlr_enabled(struct scsi_device *); |
188 | void sas_disable_tlr(struct scsi_device *); |
189 | void sas_enable_tlr(struct scsi_device *); |
190 | |
191 | extern struct sas_rphy *sas_end_device_alloc(struct sas_port *); |
192 | extern struct sas_rphy *sas_expander_alloc(struct sas_port *, enum sas_device_type); |
193 | void sas_rphy_free(struct sas_rphy *); |
194 | extern int sas_rphy_add(struct sas_rphy *); |
195 | extern void sas_rphy_remove(struct sas_rphy *); |
196 | extern void sas_rphy_delete(struct sas_rphy *); |
197 | extern int scsi_is_sas_rphy(const struct device *); |
198 | |
199 | struct sas_port *sas_port_alloc(struct device *, int); |
200 | struct sas_port *sas_port_alloc_num(struct device *); |
201 | int sas_port_add(struct sas_port *); |
202 | void sas_port_free(struct sas_port *); |
203 | void sas_port_delete(struct sas_port *); |
204 | void sas_port_add_phy(struct sas_port *, struct sas_phy *); |
205 | void sas_port_delete_phy(struct sas_port *, struct sas_phy *); |
206 | void sas_port_mark_backlink(struct sas_port *); |
207 | int scsi_is_sas_port(const struct device *); |
208 | |
209 | extern struct scsi_transport_template * |
210 | sas_attach_transport(struct sas_function_template *); |
211 | extern void sas_release_transport(struct scsi_transport_template *); |
212 | int sas_read_port_mode_page(struct scsi_device *); |
213 | |
214 | static inline int |
215 | scsi_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 |
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