drivers/scsi/hisi_sas/hisi_sas.h

   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/clk.h>
  17 #include <linux/dmapool.h>
  18 #include <linux/iopoll.h>
  19 #include <linux/mfd/syscon.h>
  20 #include <linux/module.h>
  21 #include <linux/of_address.h>
  22 #include <linux/pci.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/property.h>
  25 #include <linux/regmap.h>
  26 #include <scsi/sas_ata.h>
  27 #include <scsi/libsas.h>
  28
  29 #define HISI_SAS_MAX_PHYS       9
  30 #define HISI_SAS_MAX_QUEUES     32
  31 #define HISI_SAS_QUEUE_SLOTS 512
  32 #define HISI_SAS_MAX_ITCT_ENTRIES 1024
  33 #define HISI_SAS_MAX_DEVICES HISI_SAS_MAX_ITCT_ENTRIES
  34 #define HISI_SAS_RESET_BIT      0
  35 #define HISI_SAS_REJECT_CMD_BIT 1
  36
  37 #define HISI_SAS_STATUS_BUF_SZ (sizeof(struct hisi_sas_status_buffer))
  38 #define HISI_SAS_COMMAND_TABLE_SZ (sizeof(union hisi_sas_command_table))
  39
  40 #define hisi_sas_status_buf_addr(buf) \
  41         (buf + offsetof(struct hisi_sas_slot_buf_table, status_buffer))
  42 #define hisi_sas_status_buf_addr_mem(slot) hisi_sas_status_buf_addr(slot->buf)
  43 #define hisi_sas_status_buf_addr_dma(slot) \
  44         hisi_sas_status_buf_addr(slot->buf_dma)
  45
  46 #define hisi_sas_cmd_hdr_addr(buf) \
  47         (buf + offsetof(struct hisi_sas_slot_buf_table, command_header))
  48 #define hisi_sas_cmd_hdr_addr_mem(slot) hisi_sas_cmd_hdr_addr(slot->buf)
  49 #define hisi_sas_cmd_hdr_addr_dma(slot) hisi_sas_cmd_hdr_addr(slot->buf_dma)
  50
  51 #define hisi_sas_sge_addr(buf) \
  52         (buf + offsetof(struct hisi_sas_slot_buf_table, sge_page))
  53 #define hisi_sas_sge_addr_mem(slot) hisi_sas_sge_addr(slot->buf)
  54 #define hisi_sas_sge_addr_dma(slot) hisi_sas_sge_addr(slot->buf_dma)
  55
  56 #define HISI_SAS_MAX_SSP_RESP_SZ (sizeof(struct ssp_frame_hdr) + 1024)
  57 #define HISI_SAS_MAX_SMP_RESP_SZ 1028
  58 #define HISI_SAS_MAX_STP_RESP_SZ 28
  59
  60 #define DEV_IS_EXPANDER(type) \
  61         ((type == SAS_EDGE_EXPANDER_DEVICE) || \
  62         (type == SAS_FANOUT_EXPANDER_DEVICE))
  63
  64 #define HISI_SAS_SATA_PROTOCOL_NONDATA          0x1
  65 #define HISI_SAS_SATA_PROTOCOL_PIO                      0x2
  66 #define HISI_SAS_SATA_PROTOCOL_DMA                      0x4
  67 #define HISI_SAS_SATA_PROTOCOL_FPDMA            0x8
  68 #define HISI_SAS_SATA_PROTOCOL_ATAPI            0x10
  69
  70 struct hisi_hba;
  71
  72 enum {
  73         PORT_TYPE_SAS = (1U << 1),
  74         PORT_TYPE_SATA = (1U << 0),
  75 };
  76
  77 enum dev_status {
  78         HISI_SAS_DEV_NORMAL,
  79         HISI_SAS_DEV_EH,
  80 };
  81
  82 enum {
  83         HISI_SAS_INT_ABT_CMD = 0,
  84         HISI_SAS_INT_ABT_DEV = 1,
  85 };
  86
  87 enum hisi_sas_dev_type {
  88         HISI_SAS_DEV_TYPE_STP = 0,
  89         HISI_SAS_DEV_TYPE_SSP,
  90         HISI_SAS_DEV_TYPE_SATA,
  91 };
  92
  93 struct hisi_sas_hw_error {
  94         u32 irq_msk;
  95         u32 msk;
  96         int shift;
  97         const char *msg;
  98         int reg;
  99         const struct hisi_sas_hw_error *sub;
 100 };
 101
 102 struct hisi_sas_rst {
 103         struct hisi_hba *hisi_hba;
 104         struct completion *completion;
 105         struct work_struct work;
 106         bool done;
 107 };
 108
 109 #define HISI_SAS_RST_WORK_INIT(r, c) \
 110         {       .hisi_hba = hisi_hba, \
 111                 .completion = &c, \
 112                 .work = __WORK_INITIALIZER(r.work, \
 113                                 hisi_sas_sync_rst_work_handler), \
 114                 .done = false, \
 115                 }
 116
 117 #define HISI_SAS_DECLARE_RST_WORK_ON_STACK(r) \
 118         DECLARE_COMPLETION_ONSTACK(c); \
 119         DECLARE_WORK(w, hisi_sas_sync_rst_work_handler); \
 120         struct hisi_sas_rst r = HISI_SAS_RST_WORK_INIT(r, c)
 121
 122 enum hisi_sas_bit_err_type {
 123         HISI_SAS_ERR_SINGLE_BIT_ECC = 0x0,
 124         HISI_SAS_ERR_MULTI_BIT_ECC = 0x1,
 125 };
 126
 127 enum hisi_sas_phy_event {
 128         HISI_PHYE_PHY_UP   = 0U,
 129         HISI_PHYE_LINK_RESET,
 130         HISI_PHYES_NUM,
 131 };
 132
 133 struct hisi_sas_phy {
 134         struct work_struct      works[HISI_PHYES_NUM];
 135         struct hisi_hba *hisi_hba;
 136         struct hisi_sas_port    *port;
 137         struct asd_sas_phy      sas_phy;
 138         struct sas_identify     identify;
 139         struct completion *reset_completion;
 140         spinlock_t lock;
 141         u64             port_id; /* from hw */
 142         u64             dev_sas_addr;
 143         u64             frame_rcvd_size;
 144         u8              frame_rcvd[32];
 145         u8              phy_attached;
 146         u8              in_reset;
 147         u8              reserved[2];
 148         u32             phy_type;
 149         enum sas_linkrate       minimum_linkrate;
 150         enum sas_linkrate       maximum_linkrate;
 151 };
 152
 153 struct hisi_sas_port {
 154         struct asd_sas_port     sas_port;
 155         u8      port_attached;
 156         u8      id; /* from hw */
 157 };
 158
 159 struct hisi_sas_cq {
 160         struct hisi_hba *hisi_hba;
 161         struct tasklet_struct tasklet;
 162         int     rd_point;
 163         int     id;
 164 };
 165
 166 struct hisi_sas_dq {
 167         struct hisi_hba *hisi_hba;
 168         struct list_head list;
 169         spinlock_t lock;
 170         int     wr_point;
 171         int     id;
 172 };
 173
 174 struct hisi_sas_device {
 175         struct hisi_hba         *hisi_hba;
 176         struct domain_device    *sas_device;
 177         struct completion *completion;
 178         struct hisi_sas_dq      *dq;
 179         struct list_head        list;
 180         u64 attached_phy;
 181         enum sas_device_type    dev_type;
 182         int device_id;
 183         int sata_idx;
 184         u8 dev_status;
 185 };
 186
 187 struct hisi_sas_tmf_task {
 188         int force_phy;
 189         int phy_id;
 190         u8 tmf;
 191         u16 tag_of_task_to_be_managed;
 192 };
 193
 194 struct hisi_sas_slot {
 195         struct list_head entry;
 196         struct list_head delivery;
 197         struct sas_task *task;
 198         struct hisi_sas_port    *port;
 199         u64     n_elem;
 200         int     dlvry_queue;
 201         int     dlvry_queue_slot;
 202         int     cmplt_queue;
 203         int     cmplt_queue_slot;
 204         int     idx;
 205         int     abort;
 206         int     ready;
 207         void    *buf;
 208         dma_addr_t buf_dma;
 209         void    *cmd_hdr;
 210         dma_addr_t cmd_hdr_dma;
 211         struct work_struct abort_slot;
 212         struct timer_list internal_abort_timer;
 213         bool is_internal;
 214         struct hisi_sas_tmf_task *tmf;
 215 };
 216
 217 struct hisi_sas_hw {
 218         int (*hw_init)(struct hisi_hba *hisi_hba);
 219         void (*setup_itct)(struct hisi_hba *hisi_hba,
 220                            struct hisi_sas_device *device);
 221         int (*slot_index_alloc)(struct hisi_hba *hisi_hba, int *slot_idx,
 222                                 struct domain_device *device);
 223         struct hisi_sas_device *(*alloc_dev)(struct domain_device *device);
 224         void (*sl_notify)(struct hisi_hba *hisi_hba, int phy_no);
 225         int (*get_free_slot)(struct hisi_hba *hisi_hba, struct hisi_sas_dq *dq);
 226         void (*start_delivery)(struct hisi_sas_dq *dq);
 227         void (*prep_ssp)(struct hisi_hba *hisi_hba,
 228                         struct hisi_sas_slot *slot);
 229         void (*prep_smp)(struct hisi_hba *hisi_hba,
 230                         struct hisi_sas_slot *slot);
 231         void (*prep_stp)(struct hisi_hba *hisi_hba,
 232                         struct hisi_sas_slot *slot);
 233         void (*prep_abort)(struct hisi_hba *hisi_hba,
 234                           struct hisi_sas_slot *slot,
 235                           int device_id, int abort_flag, int tag_to_abort);
 236         int (*slot_complete)(struct hisi_hba *hisi_hba,
 237                              struct hisi_sas_slot *slot);
 238         void (*phys_init)(struct hisi_hba *hisi_hba);
 239         void (*phy_start)(struct hisi_hba *hisi_hba, int phy_no);
 240         void (*phy_disable)(struct hisi_hba *hisi_hba, int phy_no);
 241         void (*phy_hard_reset)(struct hisi_hba *hisi_hba, int phy_no);
 242         void (*get_events)(struct hisi_hba *hisi_hba, int phy_no);
 243         void (*phy_set_linkrate)(struct hisi_hba *hisi_hba, int phy_no,
 244                         struct sas_phy_linkrates *linkrates);
 245         enum sas_linkrate (*phy_get_max_linkrate)(void);
 246         void (*clear_itct)(struct hisi_hba *hisi_hba,
 247                             struct hisi_sas_device *dev);
 248         void (*free_device)(struct hisi_sas_device *sas_dev);
 249         int (*get_wideport_bitmap)(struct hisi_hba *hisi_hba, int port_id);
 250         void (*dereg_device)(struct hisi_hba *hisi_hba,
 251                                 struct domain_device *device);
 252         int (*soft_reset)(struct hisi_hba *hisi_hba);
 253         u32 (*get_phys_state)(struct hisi_hba *hisi_hba);
 254         int (*write_gpio)(struct hisi_hba *hisi_hba, u8 reg_type,
 255                                 u8 reg_index, u8 reg_count, u8 *write_data);
 256         void (*wait_cmds_complete_timeout)(struct hisi_hba *hisi_hba,
 257                                            int delay_ms, int timeout_ms);
 258         int max_command_entries;
 259         int complete_hdr_size;
 260         struct scsi_host_template *sht;
 261 };
 262
 263 struct hisi_hba {
 264         /* This must be the first element, used by SHOST_TO_SAS_HA */
 265         struct sas_ha_struct *p;
 266
 267         struct platform_device *platform_dev;
 268         struct pci_dev *pci_dev;
 269         struct device *dev;
 270
 271         void __iomem *regs;
 272         void __iomem *sgpio_regs;
 273         struct regmap *ctrl;
 274         u32 ctrl_reset_reg;
 275         u32 ctrl_reset_sts_reg;
 276         u32 ctrl_clock_ena_reg;
 277         u32 refclk_frequency_mhz;
 278         u8 sas_addr[SAS_ADDR_SIZE];
 279
 280         int n_phy;
 281         spinlock_t lock;
 282         struct semaphore sem;
 283
 284         struct timer_list timer;
 285         struct workqueue_struct *wq;
 286
 287         int slot_index_count;
 288         int last_slot_index;
 289         int last_dev_id;
 290         unsigned long *slot_index_tags;
 291         unsigned long reject_stp_links_msk;
 292
 293         /* SCSI/SAS glue */
 294         struct sas_ha_struct sha;
 295         struct Scsi_Host *shost;
 296
 297         struct hisi_sas_cq cq[HISI_SAS_MAX_QUEUES];
 298         struct hisi_sas_dq dq[HISI_SAS_MAX_QUEUES];
 299         struct hisi_sas_phy phy[HISI_SAS_MAX_PHYS];
 300         struct hisi_sas_port port[HISI_SAS_MAX_PHYS];
 301
 302         int     queue_count;
 303
 304         struct dma_pool *buffer_pool;
 305         struct hisi_sas_device  devices[HISI_SAS_MAX_DEVICES];
 306         struct hisi_sas_cmd_hdr *cmd_hdr[HISI_SAS_MAX_QUEUES];
 307         dma_addr_t cmd_hdr_dma[HISI_SAS_MAX_QUEUES];
 308         void *complete_hdr[HISI_SAS_MAX_QUEUES];
 309         dma_addr_t complete_hdr_dma[HISI_SAS_MAX_QUEUES];
 310         struct hisi_sas_initial_fis *initial_fis;
 311         dma_addr_t initial_fis_dma;
 312         struct hisi_sas_itct *itct;
 313         dma_addr_t itct_dma;
 314         struct hisi_sas_iost *iost;
 315         dma_addr_t iost_dma;
 316         struct hisi_sas_breakpoint *breakpoint;
 317         dma_addr_t breakpoint_dma;
 318         struct hisi_sas_breakpoint *sata_breakpoint;
 319         dma_addr_t sata_breakpoint_dma;
 320         struct hisi_sas_slot    *slot_info;
 321         unsigned long flags;
 322         const struct hisi_sas_hw *hw;   /* Low level hw interface */
 323         unsigned long sata_dev_bitmap[BITS_TO_LONGS(HISI_SAS_MAX_DEVICES)];
 324         struct work_struct rst_work;
 325 };
 326
 327 /* Generic HW DMA host memory structures */
 328 /* Delivery queue header */
 329 struct hisi_sas_cmd_hdr {
 330         /* dw0 */
 331         __le32 dw0;
 332
 333         /* dw1 */
 334         __le32 dw1;
 335
 336         /* dw2 */
 337         __le32 dw2;
 338
 339         /* dw3 */
 340         __le32 transfer_tags;
 341
 342         /* dw4 */
 343         __le32 data_transfer_len;
 344
 345         /* dw5 */
 346         __le32 first_burst_num;
 347
 348         /* dw6 */
 349         __le32 sg_len;
 350
 351         /* dw7 */
 352         __le32 dw7;
 353
 354         /* dw8-9 */
 355         __le64 cmd_table_addr;
 356
 357         /* dw10-11 */
 358         __le64 sts_buffer_addr;
 359
 360         /* dw12-13 */
 361         __le64 prd_table_addr;
 362
 363         /* dw14-15 */
 364         __le64 dif_prd_table_addr;
 365 };
 366
 367 struct hisi_sas_itct {
 368         __le64 qw0;
 369         __le64 sas_addr;
 370         __le64 qw2;
 371         __le64 qw3;
 372         __le64 qw4_15[12];
 373 };
 374
 375 struct hisi_sas_iost {
 376         __le64 qw0;
 377         __le64 qw1;
 378         __le64 qw2;
 379         __le64 qw3;
 380 };
 381
 382 struct hisi_sas_err_record {
 383         u32     data[4];
 384 };
 385
 386 struct hisi_sas_initial_fis {
 387         struct hisi_sas_err_record err_record;
 388         struct dev_to_host_fis fis;
 389         u32 rsvd[3];
 390 };
 391
 392 struct hisi_sas_breakpoint {
 393         u8      data[128];
 394 };
 395
 396 struct hisi_sas_sata_breakpoint {
 397         struct hisi_sas_breakpoint tag[32];
 398 };
 399
 400 struct hisi_sas_sge {
 401         __le64 addr;
 402         __le32 page_ctrl_0;
 403         __le32 page_ctrl_1;
 404         __le32 data_len;
 405         __le32 data_off;
 406 };
 407
 408 struct hisi_sas_command_table_smp {
 409         u8 bytes[44];
 410 };
 411
 412 struct hisi_sas_command_table_stp {
 413         struct  host_to_dev_fis command_fis;
 414         u8      dummy[12];
 415         u8      atapi_cdb[ATAPI_CDB_LEN];
 416 };
 417
 418 #define HISI_SAS_SGE_PAGE_CNT SG_CHUNK_SIZE
 419 struct hisi_sas_sge_page {
 420         struct hisi_sas_sge sge[HISI_SAS_SGE_PAGE_CNT];
 421 }  __aligned(16);
 422
 423 struct hisi_sas_command_table_ssp {
 424         struct ssp_frame_hdr hdr;
 425         union {
 426                 struct {
 427                         struct ssp_command_iu task;
 428                         u32 prot[7];
 429                 };
 430                 struct ssp_tmf_iu ssp_task;
 431                 struct xfer_rdy_iu xfer_rdy;
 432                 struct ssp_response_iu ssp_res;
 433         } u;
 434 };
 435
 436 union hisi_sas_command_table {
 437         struct hisi_sas_command_table_ssp ssp;
 438         struct hisi_sas_command_table_smp smp;
 439         struct hisi_sas_command_table_stp stp;
 440 }  __aligned(16);
 441
 442 struct hisi_sas_status_buffer {
 443         struct hisi_sas_err_record err;
 444         u8      iu[1024];
 445 }  __aligned(16);
 446
 447 struct hisi_sas_slot_buf_table {
 448         struct hisi_sas_status_buffer status_buffer;
 449         union hisi_sas_command_table command_header;
 450         struct hisi_sas_sge_page sge_page;
 451 };
 452
 453 extern struct scsi_transport_template *hisi_sas_stt;
 454 extern void hisi_sas_stop_phys(struct hisi_hba *hisi_hba);
 455 extern void hisi_sas_init_add(struct hisi_hba *hisi_hba);
 456 extern int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost);
 457 extern void hisi_sas_free(struct hisi_hba *hisi_hba);
 458 extern u8 hisi_sas_get_ata_protocol(struct host_to_dev_fis *fis,
 459                                 int direction);
 460 extern struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port);
 461 extern void hisi_sas_sata_done(struct sas_task *task,
 462                             struct hisi_sas_slot *slot);
 463 extern int hisi_sas_get_ncq_tag(struct sas_task *task, u32 *tag);
 464 extern int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba);
 465 extern int hisi_sas_probe(struct platform_device *pdev,
 466                           const struct hisi_sas_hw *ops);
 467 extern int hisi_sas_remove(struct platform_device *pdev);
 468
 469 extern int hisi_sas_slave_configure(struct scsi_device *sdev);
 470 extern int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time);
 471 extern void hisi_sas_scan_start(struct Scsi_Host *shost);
 472 extern struct device_attribute *host_attrs[];
 473 extern int hisi_sas_host_reset(struct Scsi_Host *shost, int reset_type);
 474 extern void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy);
 475 extern void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba,
 476                                     struct sas_task *task,
 477                                     struct hisi_sas_slot *slot);
 478 extern void hisi_sas_init_mem(struct hisi_hba *hisi_hba);
 479 extern void hisi_sas_rst_work_handler(struct work_struct *work);
 480 extern void hisi_sas_sync_rst_work_handler(struct work_struct *work);
 481 extern void hisi_sas_kill_tasklets(struct hisi_hba *hisi_hba);
 482 extern bool hisi_sas_notify_phy_event(struct hisi_sas_phy *phy,
 483                                 enum hisi_sas_phy_event event);
 484 extern void hisi_sas_release_tasks(struct hisi_hba *hisi_hba);
 485 extern u8 hisi_sas_get_prog_phy_linkrate_mask(enum sas_linkrate max);
 486 #endif