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_phy {
 103         struct hisi_hba *hisi_hba;
 104         struct hisi_sas_port    *port;
 105         struct asd_sas_phy      sas_phy;
 106         struct sas_identify     identify;
 107         struct timer_list       timer;
 108         struct work_struct      phyup_ws;
 109         u64             port_id; /* from hw */
 110         u64             dev_sas_addr;
 111         u64             frame_rcvd_size;
 112         u8              frame_rcvd[32];
 113         u8              phy_attached;
 114         u8              reserved[3];
 115         u32             phy_type;
 116         enum sas_linkrate       minimum_linkrate;
 117         enum sas_linkrate       maximum_linkrate;
 118 };
 119
 120 struct hisi_sas_port {
 121         struct asd_sas_port     sas_port;
 122         u8      port_attached;
 123         u8      id; /* from hw */
 124 };
 125
 126 struct hisi_sas_cq {
 127         struct hisi_hba *hisi_hba;
 128         struct tasklet_struct tasklet;
 129         int     rd_point;
 130         int     id;
 131 };
 132
 133 struct hisi_sas_dq {
 134         struct hisi_hba *hisi_hba;
 135         struct hisi_sas_slot    *slot_prep;
 136         spinlock_t lock;
 137         int     wr_point;
 138         int     id;
 139 };
 140
 141 struct hisi_sas_device {
 142         struct hisi_hba         *hisi_hba;
 143         struct domain_device    *sas_device;
 144         struct completion *completion;
 145         struct hisi_sas_dq      *dq;
 146         struct list_head        list;
 147         u64 attached_phy;
 148         atomic64_t running_req;
 149         enum sas_device_type    dev_type;
 150         int device_id;
 151         int sata_idx;
 152         u8 dev_status;
 153 };
 154
 155 struct hisi_sas_slot {
 156         struct list_head entry;
 157         struct sas_task *task;
 158         struct hisi_sas_port    *port;
 159         u64     n_elem;
 160         int     dlvry_queue;
 161         int     dlvry_queue_slot;
 162         int     cmplt_queue;
 163         int     cmplt_queue_slot;
 164         int     idx;
 165         int     abort;
 166         void    *buf;
 167         dma_addr_t buf_dma;
 168         void    *cmd_hdr;
 169         dma_addr_t cmd_hdr_dma;
 170         struct work_struct abort_slot;
 171         struct timer_list internal_abort_timer;
 172 };
 173
 174 struct hisi_sas_tmf_task {
 175         u8 tmf;
 176         u16 tag_of_task_to_be_managed;
 177 };
 178
 179 struct hisi_sas_hw {
 180         int (*hw_init)(struct hisi_hba *hisi_hba);
 181         void (*setup_itct)(struct hisi_hba *hisi_hba,
 182                            struct hisi_sas_device *device);
 183         int (*slot_index_alloc)(struct hisi_hba *hisi_hba, int *slot_idx,
 184                                 struct domain_device *device);
 185         struct hisi_sas_device *(*alloc_dev)(struct domain_device *device);
 186         void (*sl_notify)(struct hisi_hba *hisi_hba, int phy_no);
 187         int (*get_free_slot)(struct hisi_hba *hisi_hba, struct hisi_sas_dq *dq);
 188         void (*start_delivery)(struct hisi_sas_dq *dq);
 189         int (*prep_ssp)(struct hisi_hba *hisi_hba,
 190                         struct hisi_sas_slot *slot, int is_tmf,
 191                         struct hisi_sas_tmf_task *tmf);
 192         int (*prep_smp)(struct hisi_hba *hisi_hba,
 193                         struct hisi_sas_slot *slot);
 194         int (*prep_stp)(struct hisi_hba *hisi_hba,
 195                         struct hisi_sas_slot *slot);
 196         int (*prep_abort)(struct hisi_hba *hisi_hba,
 197                           struct hisi_sas_slot *slot,
 198                           int device_id, int abort_flag, int tag_to_abort);
 199         int (*slot_complete)(struct hisi_hba *hisi_hba,
 200                              struct hisi_sas_slot *slot);
 201         void (*phys_init)(struct hisi_hba *hisi_hba);
 202         void (*phy_start)(struct hisi_hba *hisi_hba, int phy_no);
 203         void (*phy_disable)(struct hisi_hba *hisi_hba, int phy_no);
 204         void (*phy_hard_reset)(struct hisi_hba *hisi_hba, int phy_no);
 205         void (*get_events)(struct hisi_hba *hisi_hba, int phy_no);
 206         void (*phy_set_linkrate)(struct hisi_hba *hisi_hba, int phy_no,
 207                         struct sas_phy_linkrates *linkrates);
 208         enum sas_linkrate (*phy_get_max_linkrate)(void);
 209         void (*free_device)(struct hisi_hba *hisi_hba,
 210                             struct hisi_sas_device *dev);
 211         int (*get_wideport_bitmap)(struct hisi_hba *hisi_hba, int port_id);
 212         void (*dereg_device)(struct hisi_hba *hisi_hba,
 213                                 struct domain_device *device);
 214         int (*soft_reset)(struct hisi_hba *hisi_hba);
 215         u32 (*get_phys_state)(struct hisi_hba *hisi_hba);
 216         int max_command_entries;
 217         int complete_hdr_size;
 218 };
 219
 220 struct hisi_hba {
 221         /* This must be the first element, used by SHOST_TO_SAS_HA */
 222         struct sas_ha_struct *p;
 223
 224         struct platform_device *platform_dev;
 225         struct pci_dev *pci_dev;
 226         struct device *dev;
 227
 228         void __iomem *regs;
 229         struct regmap *ctrl;
 230         u32 ctrl_reset_reg;
 231         u32 ctrl_reset_sts_reg;
 232         u32 ctrl_clock_ena_reg;
 233         u32 refclk_frequency_mhz;
 234         u8 sas_addr[SAS_ADDR_SIZE];
 235
 236         int n_phy;
 237         spinlock_t lock;
 238
 239         struct timer_list timer;
 240         struct workqueue_struct *wq;
 241
 242         int slot_index_count;
 243         unsigned long *slot_index_tags;
 244         unsigned long reject_stp_links_msk;
 245
 246         /* SCSI/SAS glue */
 247         struct sas_ha_struct sha;
 248         struct Scsi_Host *shost;
 249
 250         struct hisi_sas_cq cq[HISI_SAS_MAX_QUEUES];
 251         struct hisi_sas_dq dq[HISI_SAS_MAX_QUEUES];
 252         struct hisi_sas_phy phy[HISI_SAS_MAX_PHYS];
 253         struct hisi_sas_port port[HISI_SAS_MAX_PHYS];
 254
 255         int     queue_count;
 256
 257         struct dma_pool *buffer_pool;
 258         struct hisi_sas_device  devices[HISI_SAS_MAX_DEVICES];
 259         struct hisi_sas_cmd_hdr *cmd_hdr[HISI_SAS_MAX_QUEUES];
 260         dma_addr_t cmd_hdr_dma[HISI_SAS_MAX_QUEUES];
 261         void *complete_hdr[HISI_SAS_MAX_QUEUES];
 262         dma_addr_t complete_hdr_dma[HISI_SAS_MAX_QUEUES];
 263         struct hisi_sas_initial_fis *initial_fis;
 264         dma_addr_t initial_fis_dma;
 265         struct hisi_sas_itct *itct;
 266         dma_addr_t itct_dma;
 267         struct hisi_sas_iost *iost;
 268         dma_addr_t iost_dma;
 269         struct hisi_sas_breakpoint *breakpoint;
 270         dma_addr_t breakpoint_dma;
 271         struct hisi_sas_breakpoint *sata_breakpoint;
 272         dma_addr_t sata_breakpoint_dma;
 273         struct hisi_sas_slot    *slot_info;
 274         unsigned long flags;
 275         const struct hisi_sas_hw *hw;   /* Low level hw interface */
 276         unsigned long sata_dev_bitmap[BITS_TO_LONGS(HISI_SAS_MAX_DEVICES)];
 277         struct work_struct rst_work;
 278 };
 279
 280 /* Generic HW DMA host memory structures */
 281 /* Delivery queue header */
 282 struct hisi_sas_cmd_hdr {
 283         /* dw0 */
 284         __le32 dw0;
 285
 286         /* dw1 */
 287         __le32 dw1;
 288
 289         /* dw2 */
 290         __le32 dw2;
 291
 292         /* dw3 */
 293         __le32 transfer_tags;
 294
 295         /* dw4 */
 296         __le32 data_transfer_len;
 297
 298         /* dw5 */
 299         __le32 first_burst_num;
 300
 301         /* dw6 */
 302         __le32 sg_len;
 303
 304         /* dw7 */
 305         __le32 dw7;
 306
 307         /* dw8-9 */
 308         __le64 cmd_table_addr;
 309
 310         /* dw10-11 */
 311         __le64 sts_buffer_addr;
 312
 313         /* dw12-13 */
 314         __le64 prd_table_addr;
 315
 316         /* dw14-15 */
 317         __le64 dif_prd_table_addr;
 318 };
 319
 320 struct hisi_sas_itct {
 321         __le64 qw0;
 322         __le64 sas_addr;
 323         __le64 qw2;
 324         __le64 qw3;
 325         __le64 qw4_15[12];
 326 };
 327
 328 struct hisi_sas_iost {
 329         __le64 qw0;
 330         __le64 qw1;
 331         __le64 qw2;
 332         __le64 qw3;
 333 };
 334
 335 struct hisi_sas_err_record {
 336         u32     data[4];
 337 };
 338
 339 struct hisi_sas_initial_fis {
 340         struct hisi_sas_err_record err_record;
 341         struct dev_to_host_fis fis;
 342         u32 rsvd[3];
 343 };
 344
 345 struct hisi_sas_breakpoint {
 346         u8      data[128];
 347 };
 348
 349 struct hisi_sas_sata_breakpoint {
 350         struct hisi_sas_breakpoint tag[32];
 351 };
 352
 353 struct hisi_sas_sge {
 354         __le64 addr;
 355         __le32 page_ctrl_0;
 356         __le32 page_ctrl_1;
 357         __le32 data_len;
 358         __le32 data_off;
 359 };
 360
 361 struct hisi_sas_command_table_smp {
 362         u8 bytes[44];
 363 };
 364
 365 struct hisi_sas_command_table_stp {
 366         struct  host_to_dev_fis command_fis;
 367         u8      dummy[12];
 368         u8      atapi_cdb[ATAPI_CDB_LEN];
 369 };
 370
 371 #define HISI_SAS_SGE_PAGE_CNT SG_CHUNK_SIZE
 372 struct hisi_sas_sge_page {
 373         struct hisi_sas_sge sge[HISI_SAS_SGE_PAGE_CNT];
 374 }  __aligned(16);
 375
 376 struct hisi_sas_command_table_ssp {
 377         struct ssp_frame_hdr hdr;
 378         union {
 379                 struct {
 380                         struct ssp_command_iu task;
 381                         u32 prot[6];
 382                 };
 383                 struct ssp_tmf_iu ssp_task;
 384                 struct xfer_rdy_iu xfer_rdy;
 385                 struct ssp_response_iu ssp_res;
 386         } u;
 387 };
 388
 389 union hisi_sas_command_table {
 390         struct hisi_sas_command_table_ssp ssp;
 391         struct hisi_sas_command_table_smp smp;
 392         struct hisi_sas_command_table_stp stp;
 393 }  __aligned(16);
 394
 395 struct hisi_sas_status_buffer {
 396         struct hisi_sas_err_record err;
 397         u8      iu[1024];
 398 }  __aligned(16);
 399
 400 struct hisi_sas_slot_buf_table {
 401         struct hisi_sas_status_buffer status_buffer;
 402         union hisi_sas_command_table command_header;
 403         struct hisi_sas_sge_page sge_page;
 404 };
 405
 406 extern struct scsi_transport_template *hisi_sas_stt;
 407 extern struct scsi_host_template *hisi_sas_sht;
 408
 409 extern void hisi_sas_stop_phys(struct hisi_hba *hisi_hba);
 410 extern void hisi_sas_init_add(struct hisi_hba *hisi_hba);
 411 extern int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost);
 412 extern void hisi_sas_free(struct hisi_hba *hisi_hba);
 413 extern u8 hisi_sas_get_ata_protocol(u8 cmd, int direction);
 414 extern struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port);
 415 extern void hisi_sas_sata_done(struct sas_task *task,
 416                             struct hisi_sas_slot *slot);
 417 extern int hisi_sas_get_ncq_tag(struct sas_task *task, u32 *tag);
 418 extern int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba);
 419 extern int hisi_sas_probe(struct platform_device *pdev,
 420                           const struct hisi_sas_hw *ops);
 421 extern int hisi_sas_remove(struct platform_device *pdev);
 422
 423 extern void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy);
 424 extern void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba,
 425                                     struct sas_task *task,
 426                                     struct hisi_sas_slot *slot);
 427 extern void hisi_sas_init_mem(struct hisi_hba *hisi_hba);
 428 #endif