drivers/scsi/aic94xx/aic94xx_hwi.h

   1 /*
   2  * Aic94xx SAS/SATA driver hardware interface header file.
   3  *
   4  * Copyright (C) 2005 Adaptec, Inc.  All rights reserved.
   5  * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
   6  *
   7  * This file is licensed under GPLv2.
   8  *
   9  * This file is part of the aic94xx driver.
  10  *
  11  * The aic94xx driver is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License as
  13  * published by the Free Software Foundation; version 2 of the
  14  * License.
  15  *
  16  * The aic94xx driver is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with the aic94xx driver; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  24  *
  25  */
  26
  27 #ifndef _AIC94XX_HWI_H_
  28 #define _AIC94XX_HWI_H_
  29
  30 #include <linux/interrupt.h>
  31 #include <linux/pci.h>
  32 #include <linux/dma-mapping.h>
  33
  34 #include <scsi/libsas.h>
  35
  36 #include "aic94xx.h"
  37 #include "aic94xx_sas.h"
  38
  39 /* Define ASD_MAX_PHYS to the maximum phys ever. Currently 8. */
  40 #define ASD_MAX_PHYS       8
  41 #define ASD_PCBA_SN_SIZE   12
  42
  43 struct asd_ha_addrspace {
  44         void __iomem  *addr;
  45         unsigned long  start;       /* pci resource start */
  46         unsigned long  len;         /* pci resource len */
  47         unsigned long  flags;       /* pci resource flags */
  48
  49         /* addresses internal to the host adapter */
  50         u32 swa_base; /* mmspace 1 (MBAR1) uses this only */
  51         u32 swb_base;
  52         u32 swc_base;
  53 };
  54
  55 struct bios_struct {
  56         int    present;
  57         u8     maj;
  58         u8     min;
  59         u32    bld;
  60 };
  61
  62 struct unit_element_struct {
  63         u16    num;
  64         u16    size;
  65         void   *area;
  66 };
  67
  68 struct flash_struct {
  69         u32    bar;
  70         int    present;
  71         int    wide;
  72         u8     manuf;
  73         u8     dev_id;
  74         u8     sec_prot;
  75         u8     method;
  76
  77         u32    dir_offs;
  78 };
  79
  80 struct asd_phy_desc {
  81         /* From CTRL-A settings, then set to what is appropriate */
  82         u8     sas_addr[SAS_ADDR_SIZE];
  83         u8     max_sas_lrate;
  84         u8     min_sas_lrate;
  85         u8     max_sata_lrate;
  86         u8     min_sata_lrate;
  87         u8     flags;
  88 #define ASD_CRC_DIS  1
  89 #define ASD_SATA_SPINUP_HOLD 2
  90
  91         u8     phy_control_0; /* mode 5 reg 0x160 */
  92         u8     phy_control_1; /* mode 5 reg 0x161 */
  93         u8     phy_control_2; /* mode 5 reg 0x162 */
  94         u8     phy_control_3; /* mode 5 reg 0x163 */
  95 };
  96
  97 struct asd_dma_tok {
  98         void *vaddr;
  99         dma_addr_t dma_handle;
 100         size_t size;
 101 };
 102
 103 struct hw_profile {
 104         struct bios_struct bios;
 105         struct unit_element_struct ue;
 106         struct flash_struct flash;
 107
 108         u8     sas_addr[SAS_ADDR_SIZE];
 109         char   pcba_sn[ASD_PCBA_SN_SIZE+1];
 110
 111         u8     enabled_phys;      /* mask of enabled phys */
 112         struct asd_phy_desc phy_desc[ASD_MAX_PHYS];
 113         u32    max_scbs;          /* absolute sequencer scb queue size */
 114         struct asd_dma_tok *scb_ext;
 115         u32    max_ddbs;
 116         struct asd_dma_tok *ddb_ext;
 117
 118         spinlock_t ddb_lock;
 119         void  *ddb_bitmap;
 120
 121         int    num_phys;          /* ENABLEABLE */
 122         int    max_phys;          /* REPORTED + ENABLEABLE */
 123
 124         unsigned addr_range;      /* max # of addrs; max # of possible ports */
 125         unsigned port_name_base;
 126         unsigned dev_name_base;
 127         unsigned sata_name_base;
 128 };
 129
 130 struct asd_ascb {
 131         struct list_head list;
 132         struct asd_ha_struct *ha;
 133
 134         struct scb *scb;          /* equals dma_scb->vaddr */
 135         struct asd_dma_tok dma_scb;
 136         struct asd_dma_tok *sg_arr;
 137
 138         void (*tasklet_complete)(struct asd_ascb *, struct done_list_struct *);
 139         u8     uldd_timer:1;
 140
 141         /* internally generated command */
 142         struct timer_list timer;
 143         struct completion *completion;
 144         u8        tag_valid:1;
 145         __be16    tag;            /* error recovery only */
 146
 147         /* If this is an Empty SCB, index of first edb in seq->edb_arr. */
 148         int    edb_index;
 149
 150         /* Used by the timer timeout function. */
 151         int    tc_index;
 152
 153         void   *uldd_task;
 154 };
 155
 156 #define ASD_DL_SIZE_BITS   0x8
 157 #define ASD_DL_SIZE        (1<<(2+ASD_DL_SIZE_BITS))
 158 #define ASD_DEF_DL_TOGGLE  0x01
 159
 160 struct asd_seq_data {
 161         spinlock_t pend_q_lock;
 162         u16    scbpro;
 163         int    pending;
 164         struct list_head pend_q;
 165         int    can_queue;         /* per adapter */
 166         struct asd_dma_tok next_scb; /* next scb to be delivered to CSEQ */
 167
 168         spinlock_t tc_index_lock;
 169         void **tc_index_array;
 170         void *tc_index_bitmap;
 171         int   tc_index_bitmap_bits;
 172
 173         struct tasklet_struct dl_tasklet;
 174         struct done_list_struct *dl; /* array of done list entries, equals */
 175         struct asd_dma_tok *actual_dl; /* actual_dl->vaddr */
 176         int    dl_toggle;
 177         int    dl_next;
 178
 179         int    num_edbs;
 180         struct asd_dma_tok **edb_arr;
 181         int    num_escbs;
 182         struct asd_ascb **escb_arr; /* array of pointers to escbs */
 183 };
 184
 185 /* This is an internal port structure. These are used to get accurate
 186  * phy_mask for updating DDB 0.
 187  */
 188 struct asd_port {
 189         u8  sas_addr[SAS_ADDR_SIZE];
 190         u8  attached_sas_addr[SAS_ADDR_SIZE];
 191         u32 phy_mask;
 192         int num_phys;
 193 };
 194
 195 /* This is the Host Adapter structure.  It describes the hardware
 196  * SAS adapter.
 197  */
 198 struct asd_ha_struct {
 199         struct pci_dev   *pcidev;
 200         const char       *name;
 201
 202         struct sas_ha_struct sas_ha;
 203
 204         u8                revision_id;
 205
 206         int               iospace;
 207         spinlock_t        iolock;
 208         struct asd_ha_addrspace io_handle[2];
 209
 210         struct hw_profile hw_prof;
 211
 212         struct asd_phy    phys[ASD_MAX_PHYS];
 213         spinlock_t        asd_ports_lock;
 214         struct asd_port   asd_ports[ASD_MAX_PHYS];
 215         struct asd_sas_port   ports[ASD_MAX_PHYS];
 216
 217         struct dma_pool  *scb_pool;
 218
 219         struct asd_seq_data  seq; /* sequencer related */
 220         u32    bios_status;
 221         const struct firmware *bios_image;
 222 };
 223
 224 /* ---------- Common macros ---------- */
 225
 226 #define ASD_BUSADDR_LO(__dma_handle) ((u32)(__dma_handle))
 227 #define ASD_BUSADDR_HI(__dma_handle) (((sizeof(dma_addr_t))==8)     \
 228                                     ? ((u32)((__dma_handle) >> 32)) \
 229                                     : ((u32)0))
 230
 231 #define dev_to_asd_ha(__dev)  pci_get_drvdata(to_pci_dev(__dev))
 232 #define SCB_SITE_VALID(__site_no) (((__site_no) & 0xF0FF) != 0x00FF   \
 233                                  && ((__site_no) & 0xF0FF) > 0x001F)
 234 /* For each bit set in __lseq_mask, set __lseq to equal the bit
 235  * position of the set bit and execute the statement following.
 236  * __mc is the temporary mask, used as a mask "counter".
 237  */
 238 #define for_each_sequencer(__lseq_mask, __mc, __lseq)                        \
 239         for ((__mc)=(__lseq_mask),(__lseq)=0;(__mc)!=0;(__lseq++),(__mc)>>=1)\
 240                 if (((__mc) & 1))
 241 #define for_each_phy(__lseq_mask, __mc, __lseq)                              \
 242         for ((__mc)=(__lseq_mask),(__lseq)=0;(__mc)!=0;(__lseq++),(__mc)>>=1)\
 243                 if (((__mc) & 1))
 244
 245 #define PHY_ENABLED(_HA, _I) ((_HA)->hw_prof.enabled_phys & (1<<(_I)))
 246
 247 /* ---------- DMA allocs ---------- */
 248
 249 static inline struct asd_dma_tok *asd_dmatok_alloc(gfp_t flags)
 250 {
 251         return kmem_cache_alloc(asd_dma_token_cache, flags);
 252 }
 253
 254 static inline void asd_dmatok_free(struct asd_dma_tok *token)
 255 {
 256         kmem_cache_free(asd_dma_token_cache, token);
 257 }
 258
 259 static inline struct asd_dma_tok *asd_alloc_coherent(struct asd_ha_struct *
 260                                                      asd_ha, size_t size,
 261                                                      gfp_t flags)
 262 {
 263         struct asd_dma_tok *token = asd_dmatok_alloc(flags);
 264         if (token) {
 265                 token->size = size;
 266                 token->vaddr = dma_alloc_coherent(&asd_ha->pcidev->dev,
 267                                                   token->size,
 268                                                   &token->dma_handle,
 269                                                   flags);
 270                 if (!token->vaddr) {
 271                         asd_dmatok_free(token);
 272                         token = NULL;
 273                 }
 274         }
 275         return token;
 276 }
 277
 278 static inline void asd_free_coherent(struct asd_ha_struct *asd_ha,
 279                                      struct asd_dma_tok *token)
 280 {
 281         if (token) {
 282                 dma_free_coherent(&asd_ha->pcidev->dev, token->size,
 283                                   token->vaddr, token->dma_handle);
 284                 asd_dmatok_free(token);
 285         }
 286 }
 287
 288 static inline void asd_init_ascb(struct asd_ha_struct *asd_ha,
 289                                  struct asd_ascb *ascb)
 290 {
 291         INIT_LIST_HEAD(&ascb->list);
 292         ascb->scb = ascb->dma_scb.vaddr;
 293         ascb->ha = asd_ha;
 294         timer_setup(&ascb->timer, NULL, 0);
 295         ascb->tc_index = -1;
 296 }
 297
 298 /* Must be called with the tc_index_lock held!
 299  */
 300 static inline void asd_tc_index_release(struct asd_seq_data *seq, int index)
 301 {
 302         seq->tc_index_array[index] = NULL;
 303         clear_bit(index, seq->tc_index_bitmap);
 304 }
 305
 306 /* Must be called with the tc_index_lock held!
 307  */
 308 static inline int asd_tc_index_get(struct asd_seq_data *seq, void *ptr)
 309 {
 310         int index;
 311
 312         index = find_first_zero_bit(seq->tc_index_bitmap,
 313                                     seq->tc_index_bitmap_bits);
 314         if (index == seq->tc_index_bitmap_bits)
 315                 return -1;
 316
 317         seq->tc_index_array[index] = ptr;
 318         set_bit(index, seq->tc_index_bitmap);
 319
 320         return index;
 321 }
 322
 323 /* Must be called with the tc_index_lock held!
 324  */
 325 static inline void *asd_tc_index_find(struct asd_seq_data *seq, int index)
 326 {
 327         return seq->tc_index_array[index];
 328 }
 329
 330 /**
 331  * asd_ascb_free -- free a single aSCB after is has completed
 332  * @ascb: pointer to the aSCB of interest
 333  *
 334  * This frees an aSCB after it has been executed/completed by
 335  * the sequencer.
 336  */
 337 static inline void asd_ascb_free(struct asd_ascb *ascb)
 338 {
 339         if (ascb) {
 340                 struct asd_ha_struct *asd_ha = ascb->ha;
 341                 unsigned long flags;
 342
 343                 BUG_ON(!list_empty(&ascb->list));
 344                 spin_lock_irqsave(&ascb->ha->seq.tc_index_lock, flags);
 345                 asd_tc_index_release(&ascb->ha->seq, ascb->tc_index);
 346                 spin_unlock_irqrestore(&ascb->ha->seq.tc_index_lock, flags);
 347                 dma_pool_free(asd_ha->scb_pool, ascb->dma_scb.vaddr,
 348                               ascb->dma_scb.dma_handle);
 349                 kmem_cache_free(asd_ascb_cache, ascb);
 350         }
 351 }
 352
 353 /**
 354  * asd_ascb_list_free -- free a list of ascbs
 355  * @ascb_list: a list of ascbs
 356  *
 357  * This function will free a list of ascbs allocated by asd_ascb_alloc_list.
 358  * It is used when say the scb queueing function returned QUEUE_FULL,
 359  * and we do not need the ascbs any more.
 360  */
 361 static inline void asd_ascb_free_list(struct asd_ascb *ascb_list)
 362 {
 363         LIST_HEAD(list);
 364         struct list_head *n, *pos;
 365
 366         __list_add(&list, ascb_list->list.prev, &ascb_list->list);
 367         list_for_each_safe(pos, n, &list) {
 368                 list_del_init(pos);
 369                 asd_ascb_free(list_entry(pos, struct asd_ascb, list));
 370         }
 371 }
 372
 373 /* ---------- Function declarations ---------- */
 374
 375 int  asd_init_hw(struct asd_ha_struct *asd_ha);
 376 irqreturn_t asd_hw_isr(int irq, void *dev_id);
 377
 378
 379 struct asd_ascb *asd_ascb_alloc_list(struct asd_ha_struct
 380                                      *asd_ha, int *num,
 381                                      gfp_t gfp_mask);
 382
 383 int  asd_post_ascb_list(struct asd_ha_struct *asd_ha, struct asd_ascb *ascb,
 384                         int num);
 385 int  asd_post_escb_list(struct asd_ha_struct *asd_ha, struct asd_ascb *ascb,
 386                         int num);
 387
 388 int  asd_init_post_escbs(struct asd_ha_struct *asd_ha);
 389 void asd_build_control_phy(struct asd_ascb *ascb, int phy_id, u8 subfunc);
 390 void asd_control_led(struct asd_ha_struct *asd_ha, int phy_id, int op);
 391 void asd_turn_led(struct asd_ha_struct *asd_ha, int phy_id, int op);
 392 int  asd_enable_phys(struct asd_ha_struct *asd_ha, const u8 phy_mask);
 393
 394 void asd_ascb_timedout(struct timer_list *t);
 395 int  asd_chip_hardrst(struct asd_ha_struct *asd_ha);
 396
 397 #endif