1 /* 2 * Copyright (c) 2015 Linaro Ltd. 3 * Copyright (c) 2015 Hisilicon Limited. 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 */ 11 12 #ifndef _HISI_SAS_H_ 13 #define _HISI_SAS_H_ 14 15 #include <linux/acpi.h> 16 #include <linux/dmapool.h> 17 #include <linux/mfd/syscon.h> 18 #include <linux/module.h> 19 #include <linux/of_address.h> 20 #include <linux/platform_device.h> 21 #include <linux/property.h> 22 #include <linux/regmap.h> 23 #include <scsi/sas_ata.h> 24 #include <scsi/libsas.h> 25 26 #define DRV_VERSION "v1.5" 27 28 #define HISI_SAS_MAX_PHYS 9 29 #define HISI_SAS_MAX_QUEUES 32 30 #define HISI_SAS_QUEUE_SLOTS 512 31 #define HISI_SAS_MAX_ITCT_ENTRIES 2048 32 #define HISI_SAS_MAX_DEVICES HISI_SAS_MAX_ITCT_ENTRIES 33 34 #define HISI_SAS_STATUS_BUF_SZ \ 35 (sizeof(struct hisi_sas_err_record) + 1024) 36 #define HISI_SAS_COMMAND_TABLE_SZ \ 37 (((sizeof(union hisi_sas_command_table)+3)/4)*4) 38 39 #define HISI_SAS_MAX_SSP_RESP_SZ (sizeof(struct ssp_frame_hdr) + 1024) 40 #define HISI_SAS_MAX_SMP_RESP_SZ 1028 41 #define HISI_SAS_MAX_STP_RESP_SZ 28 42 43 #define DEV_IS_EXPANDER(type) \ 44 ((type == SAS_EDGE_EXPANDER_DEVICE) || \ 45 (type == SAS_FANOUT_EXPANDER_DEVICE)) 46 47 struct hisi_hba; 48 49 enum { 50 PORT_TYPE_SAS = (1U << 1), 51 PORT_TYPE_SATA = (1U << 0), 52 }; 53 54 enum dev_status { 55 HISI_SAS_DEV_NORMAL, 56 HISI_SAS_DEV_EH, 57 }; 58 59 enum hisi_sas_dev_type { 60 HISI_SAS_DEV_TYPE_STP = 0, 61 HISI_SAS_DEV_TYPE_SSP, 62 HISI_SAS_DEV_TYPE_SATA, 63 }; 64 65 struct hisi_sas_phy { 66 struct hisi_hba *hisi_hba; 67 struct hisi_sas_port *port; 68 struct asd_sas_phy sas_phy; 69 struct sas_identify identify; 70 struct timer_list timer; 71 struct work_struct phyup_ws; 72 u64 port_id; /* from hw */ 73 u64 dev_sas_addr; 74 u64 phy_type; 75 u64 frame_rcvd_size; 76 u8 frame_rcvd[32]; 77 u8 phy_attached; 78 u8 reserved[3]; 79 enum sas_linkrate minimum_linkrate; 80 enum sas_linkrate maximum_linkrate; 81 }; 82 83 struct hisi_sas_port { 84 struct asd_sas_port sas_port; 85 u8 port_attached; 86 u8 id; /* from hw */ 87 struct list_head list; 88 }; 89 90 struct hisi_sas_cq { 91 struct hisi_hba *hisi_hba; 92 int id; 93 }; 94 95 struct hisi_sas_device { 96 enum sas_device_type dev_type; 97 struct hisi_hba *hisi_hba; 98 struct domain_device *sas_device; 99 u64 attached_phy; 100 u64 device_id; 101 u64 running_req; 102 u8 dev_status; 103 }; 104 105 struct hisi_sas_slot { 106 struct list_head entry; 107 struct sas_task *task; 108 struct hisi_sas_port *port; 109 u64 n_elem; 110 int dlvry_queue; 111 int dlvry_queue_slot; 112 int cmplt_queue; 113 int cmplt_queue_slot; 114 int idx; 115 int abort; 116 void *cmd_hdr; 117 dma_addr_t cmd_hdr_dma; 118 void *status_buffer; 119 dma_addr_t status_buffer_dma; 120 void *command_table; 121 dma_addr_t command_table_dma; 122 struct hisi_sas_sge_page *sge_page; 123 dma_addr_t sge_page_dma; 124 struct work_struct abort_slot; 125 }; 126 127 struct hisi_sas_tmf_task { 128 u8 tmf; 129 u16 tag_of_task_to_be_managed; 130 }; 131 132 struct hisi_sas_hw { 133 int (*hw_init)(struct hisi_hba *hisi_hba); 134 void (*setup_itct)(struct hisi_hba *hisi_hba, 135 struct hisi_sas_device *device); 136 int (*slot_index_alloc)(struct hisi_hba *hisi_hba, int *slot_idx, 137 struct domain_device *device); 138 struct hisi_sas_device *(*alloc_dev)(struct domain_device *device); 139 void (*sl_notify)(struct hisi_hba *hisi_hba, int phy_no); 140 int (*get_free_slot)(struct hisi_hba *hisi_hba, int *q, int *s); 141 void (*start_delivery)(struct hisi_hba *hisi_hba); 142 int (*prep_ssp)(struct hisi_hba *hisi_hba, 143 struct hisi_sas_slot *slot, int is_tmf, 144 struct hisi_sas_tmf_task *tmf); 145 int (*prep_smp)(struct hisi_hba *hisi_hba, 146 struct hisi_sas_slot *slot); 147 int (*prep_stp)(struct hisi_hba *hisi_hba, 148 struct hisi_sas_slot *slot); 149 int (*slot_complete)(struct hisi_hba *hisi_hba, 150 struct hisi_sas_slot *slot, int abort); 151 void (*phy_enable)(struct hisi_hba *hisi_hba, int phy_no); 152 void (*phy_disable)(struct hisi_hba *hisi_hba, int phy_no); 153 void (*phy_hard_reset)(struct hisi_hba *hisi_hba, int phy_no); 154 void (*free_device)(struct hisi_hba *hisi_hba, 155 struct hisi_sas_device *dev); 156 int (*get_wideport_bitmap)(struct hisi_hba *hisi_hba, int port_id); 157 int max_command_entries; 158 int complete_hdr_size; 159 }; 160 161 struct hisi_hba { 162 /* This must be the first element, used by SHOST_TO_SAS_HA */ 163 struct sas_ha_struct *p; 164 165 struct platform_device *pdev; 166 void __iomem *regs; 167 struct regmap *ctrl; 168 u32 ctrl_reset_reg; 169 u32 ctrl_reset_sts_reg; 170 u32 ctrl_clock_ena_reg; 171 u8 sas_addr[SAS_ADDR_SIZE]; 172 173 int n_phy; 174 int scan_finished; 175 spinlock_t lock; 176 177 struct timer_list timer; 178 struct workqueue_struct *wq; 179 180 int slot_index_count; 181 unsigned long *slot_index_tags; 182 183 /* SCSI/SAS glue */ 184 struct sas_ha_struct sha; 185 struct Scsi_Host *shost; 186 187 struct hisi_sas_cq cq[HISI_SAS_MAX_QUEUES]; 188 struct hisi_sas_phy phy[HISI_SAS_MAX_PHYS]; 189 struct hisi_sas_port port[HISI_SAS_MAX_PHYS]; 190 191 int queue_count; 192 int queue; 193 struct hisi_sas_slot *slot_prep; 194 195 struct dma_pool *sge_page_pool; 196 struct hisi_sas_device devices[HISI_SAS_MAX_DEVICES]; 197 struct dma_pool *command_table_pool; 198 struct dma_pool *status_buffer_pool; 199 struct hisi_sas_cmd_hdr *cmd_hdr[HISI_SAS_MAX_QUEUES]; 200 dma_addr_t cmd_hdr_dma[HISI_SAS_MAX_QUEUES]; 201 void *complete_hdr[HISI_SAS_MAX_QUEUES]; 202 dma_addr_t complete_hdr_dma[HISI_SAS_MAX_QUEUES]; 203 struct hisi_sas_initial_fis *initial_fis; 204 dma_addr_t initial_fis_dma; 205 struct hisi_sas_itct *itct; 206 dma_addr_t itct_dma; 207 struct hisi_sas_iost *iost; 208 dma_addr_t iost_dma; 209 struct hisi_sas_breakpoint *breakpoint; 210 dma_addr_t breakpoint_dma; 211 struct hisi_sas_breakpoint *sata_breakpoint; 212 dma_addr_t sata_breakpoint_dma; 213 struct hisi_sas_slot *slot_info; 214 const struct hisi_sas_hw *hw; /* Low level hw interface */ 215 }; 216 217 /* Generic HW DMA host memory structures */ 218 /* Delivery queue header */ 219 struct hisi_sas_cmd_hdr { 220 /* dw0 */ 221 __le32 dw0; 222 223 /* dw1 */ 224 __le32 dw1; 225 226 /* dw2 */ 227 __le32 dw2; 228 229 /* dw3 */ 230 __le32 transfer_tags; 231 232 /* dw4 */ 233 __le32 data_transfer_len; 234 235 /* dw5 */ 236 __le32 first_burst_num; 237 238 /* dw6 */ 239 __le32 sg_len; 240 241 /* dw7 */ 242 __le32 dw7; 243 244 /* dw8-9 */ 245 __le64 cmd_table_addr; 246 247 /* dw10-11 */ 248 __le64 sts_buffer_addr; 249 250 /* dw12-13 */ 251 __le64 prd_table_addr; 252 253 /* dw14-15 */ 254 __le64 dif_prd_table_addr; 255 }; 256 257 struct hisi_sas_itct { 258 __le64 qw0; 259 __le64 sas_addr; 260 __le64 qw2; 261 __le64 qw3; 262 __le64 qw4_15[12]; 263 }; 264 265 struct hisi_sas_iost { 266 __le64 qw0; 267 __le64 qw1; 268 __le64 qw2; 269 __le64 qw3; 270 }; 271 272 struct hisi_sas_err_record { 273 u32 data[4]; 274 }; 275 276 struct hisi_sas_initial_fis { 277 struct hisi_sas_err_record err_record; 278 struct dev_to_host_fis fis; 279 u32 rsvd[3]; 280 }; 281 282 struct hisi_sas_breakpoint { 283 u8 data[128]; /*io128 byte*/ 284 }; 285 286 struct hisi_sas_sge { 287 __le64 addr; 288 __le32 page_ctrl_0; 289 __le32 page_ctrl_1; 290 __le32 data_len; 291 __le32 data_off; 292 }; 293 294 struct hisi_sas_command_table_smp { 295 u8 bytes[44]; 296 }; 297 298 struct hisi_sas_command_table_stp { 299 struct host_to_dev_fis command_fis; 300 u8 dummy[12]; 301 u8 atapi_cdb[ATAPI_CDB_LEN]; 302 }; 303 304 #define HISI_SAS_SGE_PAGE_CNT SG_CHUNK_SIZE 305 struct hisi_sas_sge_page { 306 struct hisi_sas_sge sge[HISI_SAS_SGE_PAGE_CNT]; 307 }; 308 309 struct hisi_sas_command_table_ssp { 310 struct ssp_frame_hdr hdr; 311 union { 312 struct { 313 struct ssp_command_iu task; 314 u32 prot[6]; 315 }; 316 struct ssp_tmf_iu ssp_task; 317 struct xfer_rdy_iu xfer_rdy; 318 struct ssp_response_iu ssp_res; 319 } u; 320 }; 321 322 union hisi_sas_command_table { 323 struct hisi_sas_command_table_ssp ssp; 324 struct hisi_sas_command_table_smp smp; 325 struct hisi_sas_command_table_stp stp; 326 }; 327 extern int hisi_sas_probe(struct platform_device *pdev, 328 const struct hisi_sas_hw *ops); 329 extern int hisi_sas_remove(struct platform_device *pdev); 330 331 extern void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy); 332 extern void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, 333 struct sas_task *task, 334 struct hisi_sas_slot *slot); 335 #endif 336