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/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 "v1.4"
  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