release/src-rt-6.x/linux/linux-2.6/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 /* Those are to be further named properly, the "RAZORx" part, and
  44  * subsequently included in include/linux/pci_ids.h.
  45  */
  46 #define PCI_DEVICE_ID_ADAPTEC2_RAZOR10 0x410
  47 #define PCI_DEVICE_ID_ADAPTEC2_RAZOR12 0x412
  48 #define PCI_DEVICE_ID_ADAPTEC2_RAZOR1E 0x41E
  49 #define PCI_DEVICE_ID_ADAPTEC2_RAZOR1F 0x41F
  50 #define PCI_DEVICE_ID_ADAPTEC2_RAZOR30 0x430
  51 #define PCI_DEVICE_ID_ADAPTEC2_RAZOR32 0x432
  52 #define PCI_DEVICE_ID_ADAPTEC2_RAZOR3E 0x43E
  53 #define PCI_DEVICE_ID_ADAPTEC2_RAZOR3F 0x43F
  54
  55 struct asd_ha_addrspace {
  56         void __iomem  *addr;
  57         unsigned long  start;       /* pci resource start */
  58         unsigned long  len;         /* pci resource len */
  59         unsigned long  flags;       /* pci resource flags */
  60
  61         /* addresses internal to the host adapter */
  62         u32 swa_base; /* mmspace 1 (MBAR1) uses this only */
  63         u32 swb_base;
  64         u32 swc_base;
  65 };
  66
  67 struct bios_struct {
  68         int    present;
  69         u8     maj;
  70         u8     min;
  71         u32    bld;
  72 };
  73
  74 struct unit_element_struct {
  75         u16    num;
  76         u16    size;
  77         void   *area;
  78 };
  79
  80 struct flash_struct {
  81         u32    bar;
  82         int    present;
  83         int    wide;
  84         u8     manuf;
  85         u8     dev_id;
  86         u8     sec_prot;
  87
  88         u32    dir_offs;
  89 };
  90
  91 struct asd_phy_desc {
  92         /* From CTRL-A settings, then set to what is appropriate */
  93         u8     sas_addr[SAS_ADDR_SIZE];
  94         u8     max_sas_lrate;
  95         u8     min_sas_lrate;
  96         u8     max_sata_lrate;
  97         u8     min_sata_lrate;
  98         u8     flags;
  99 #define ASD_CRC_DIS  1
 100 #define ASD_SATA_SPINUP_HOLD 2
 101
 102         u8     phy_control_0; /* mode 5 reg 0x160 */
 103         u8     phy_control_1; /* mode 5 reg 0x161 */
 104         u8     phy_control_2; /* mode 5 reg 0x162 */
 105         u8     phy_control_3; /* mode 5 reg 0x163 */
 106 };
 107
 108 struct asd_dma_tok {
 109         void *vaddr;
 110         dma_addr_t dma_handle;
 111         size_t size;
 112 };
 113
 114 struct hw_profile {
 115         struct bios_struct bios;
 116         struct unit_element_struct ue;
 117         struct flash_struct flash;
 118
 119         u8     sas_addr[SAS_ADDR_SIZE];
 120         char   pcba_sn[ASD_PCBA_SN_SIZE+1];
 121
 122         u8     enabled_phys;      /* mask of enabled phys */
 123         struct asd_phy_desc phy_desc[ASD_MAX_PHYS];
 124         u32    max_scbs;          /* absolute sequencer scb queue size */
 125         struct asd_dma_tok *scb_ext;
 126         u32    max_ddbs;
 127         struct asd_dma_tok *ddb_ext;
 128
 129         spinlock_t ddb_lock;
 130         void  *ddb_bitmap;
 131
 132         int    num_phys;          /* ENABLEABLE */
 133         int    max_phys;          /* REPORTED + ENABLEABLE */
 134
 135         unsigned addr_range;      /* max # of addrs; max # of possible ports */
 136         unsigned port_name_base;
 137         unsigned dev_name_base;
 138         unsigned sata_name_base;
 139 };
 140
 141 struct asd_ascb {
 142         struct list_head list;
 143         struct asd_ha_struct *ha;
 144
 145         struct scb *scb;          /* equals dma_scb->vaddr */
 146         struct asd_dma_tok dma_scb;
 147         struct asd_dma_tok *sg_arr;
 148
 149         void (*tasklet_complete)(struct asd_ascb *, struct done_list_struct *);
 150         u8     uldd_timer:1;
 151
 152         /* internally generated command */
 153         struct timer_list timer;
 154         struct completion completion;
 155         u8        tag_valid:1;
 156         __be16    tag;            /* error recovery only */
 157
 158         /* If this is an Empty SCB, index of first edb in seq->edb_arr. */
 159         int    edb_index;
 160
 161         /* Used by the timer timeout function. */
 162         int    tc_index;
 163
 164         void   *uldd_task;
 165 };
 166
 167 #define ASD_DL_SIZE_BITS   0x8
 168 #define ASD_DL_SIZE        (1<<(2+ASD_DL_SIZE_BITS))
 169 #define ASD_DEF_DL_TOGGLE  0x01
 170
 171 struct asd_seq_data {
 172         spinlock_t pend_q_lock;
 173         u16    scbpro;
 174         int    pending;
 175         struct list_head pend_q;
 176         int    can_queue;         /* per adapter */
 177         struct asd_dma_tok next_scb; /* next scb to be delivered to CSEQ */
 178
 179         spinlock_t tc_index_lock;
 180         void **tc_index_array;
 181         void *tc_index_bitmap;
 182         int   tc_index_bitmap_bits;
 183
 184         struct tasklet_struct dl_tasklet;
 185         struct done_list_struct *dl; /* array of done list entries, equals */
 186         struct asd_dma_tok *actual_dl; /* actual_dl->vaddr */
 187         int    dl_toggle;
 188         int    dl_next;
 189
 190         int    num_edbs;
 191         struct asd_dma_tok **edb_arr;
 192         int    num_escbs;
 193         struct asd_ascb **escb_arr; /* array of pointers to escbs */
 194 };
 195
 196 /* This is an internal port structure. These are used to get accurate
 197  * phy_mask for updating DDB 0.
 198  */
 199 struct asd_port {
 200         u8  sas_addr[SAS_ADDR_SIZE];
 201         u8  attached_sas_addr[SAS_ADDR_SIZE];
 202         u32 phy_mask;
 203         int num_phys;
 204 };
 205
 206 /* This is the Host Adapter structure.  It describes the hardware
 207  * SAS adapter.
 208  */
 209 struct asd_ha_struct {
 210         struct pci_dev   *pcidev;
 211         const char       *name;
 212
 213         struct sas_ha_struct sas_ha;
 214
 215         u8                revision_id;
 216
 217         int               iospace;
 218         spinlock_t        iolock;
 219         struct asd_ha_addrspace io_handle[2];
 220
 221         struct hw_profile hw_prof;
 222
 223         struct asd_phy    phys[ASD_MAX_PHYS];
 224         spinlock_t        asd_ports_lock;
 225         struct asd_port   asd_ports[ASD_MAX_PHYS];
 226         struct asd_sas_port   ports[ASD_MAX_PHYS];
 227
 228         struct dma_pool  *scb_pool;
 229
 230         struct asd_seq_data  seq; /* sequencer related */
 231 };
 232
 233 /* ---------- Common macros ---------- */
 234
 235 #define ASD_BUSADDR_LO(__dma_handle) ((u32)(__dma_handle))
 236 #define ASD_BUSADDR_HI(__dma_handle) (((sizeof(dma_addr_t))==8)     \
 237                                     ? ((u32)((__dma_handle) >> 32)) \
 238                                     : ((u32)0))
 239
 240 #define dev_to_asd_ha(__dev)  pci_get_drvdata(to_pci_dev(__dev))
 241 #define SCB_SITE_VALID(__site_no) (((__site_no) & 0xF0FF) != 0x00FF   \
 242                                  && ((__site_no) & 0xF0FF) > 0x001F)
 243 /* For each bit set in __lseq_mask, set __lseq to equal the bit
 244  * position of the set bit and execute the statement following.
 245  * __mc is the temporary mask, used as a mask "counter".
 246  */
 247 #define for_each_sequencer(__lseq_mask, __mc, __lseq)                        \
 248         for ((__mc)=(__lseq_mask),(__lseq)=0;(__mc)!=0;(__lseq++),(__mc)>>=1)\
 249                 if (((__mc) & 1))
 250 #define for_each_phy(__lseq_mask, __mc, __lseq)                              \
 251         for ((__mc)=(__lseq_mask),(__lseq)=0;(__mc)!=0;(__lseq++),(__mc)>>=1)\
 252                 if (((__mc) & 1))
 253
 254 #define PHY_ENABLED(_HA, _I) ((_HA)->hw_prof.enabled_phys & (1<<(_I)))
 255
 256 /* ---------- DMA allocs ---------- */
 257
 258 static inline struct asd_dma_tok *asd_dmatok_alloc(gfp_t flags)
 259 {
 260         return kmem_cache_alloc(asd_dma_token_cache, flags);
 261 }
 262
 263 static inline void asd_dmatok_free(struct asd_dma_tok *token)
 264 {
 265         kmem_cache_free(asd_dma_token_cache, token);
 266 }
 267
 268 static inline struct asd_dma_tok *asd_alloc_coherent(struct asd_ha_struct *
 269                                                      asd_ha, size_t size,
 270                                                      gfp_t flags)
 271 {
 272         struct asd_dma_tok *token = asd_dmatok_alloc(flags);
 273         if (token) {
 274                 token->size = size;
 275                 token->vaddr = dma_alloc_coherent(&asd_ha->pcidev->dev,
 276                                                   token->size,
 277                                                   &token->dma_handle,
 278                                                   flags);
 279                 if (!token->vaddr) {
 280                         asd_dmatok_free(token);
 281                         token = NULL;
 282                 }
 283         }
 284         return token;
 285 }
 286
 287 static inline void asd_free_coherent(struct asd_ha_struct *asd_ha,
 288                                      struct asd_dma_tok *token)
 289 {
 290         if (token) {
 291                 dma_free_coherent(&asd_ha->pcidev->dev, token->size,
 292                                   token->vaddr, token->dma_handle);
 293                 asd_dmatok_free(token);
 294         }
 295 }
 296
 297 static inline void asd_init_ascb(struct asd_ha_struct *asd_ha,
 298                                  struct asd_ascb *ascb)
 299 {
 300         INIT_LIST_HEAD(&ascb->list);
 301         ascb->scb = ascb->dma_scb.vaddr;
 302         ascb->ha = asd_ha;
 303         ascb->timer.function = NULL;
 304         init_timer(&ascb->timer);
 305         ascb->tc_index = -1;
 306         init_completion(&ascb->completion);
 307 }
 308
 309 /* Must be called with the tc_index_lock held!
 310  */
 311 static inline void asd_tc_index_release(struct asd_seq_data *seq, int index)
 312 {
 313         seq->tc_index_array[index] = NULL;
 314         clear_bit(index, seq->tc_index_bitmap);
 315 }
 316
 317 /* Must be called with the tc_index_lock held!
 318  */
 319 static inline int asd_tc_index_get(struct asd_seq_data *seq, void *ptr)
 320 {
 321         int index;
 322
 323         index = find_first_zero_bit(seq->tc_index_bitmap,
 324                                     seq->tc_index_bitmap_bits);
 325         if (index == seq->tc_index_bitmap_bits)
 326                 return -1;
 327
 328         seq->tc_index_array[index] = ptr;
 329         set_bit(index, seq->tc_index_bitmap);
 330
 331         return index;
 332 }
 333
 334 /* Must be called with the tc_index_lock held!
 335  */
 336 static inline void *asd_tc_index_find(struct asd_seq_data *seq, int index)
 337 {
 338         return seq->tc_index_array[index];
 339 }
 340
 341 /**
 342  * asd_ascb_free -- free a single aSCB after is has completed
 343  * @ascb: pointer to the aSCB of interest
 344  *
 345  * This frees an aSCB after it has been executed/completed by
 346  * the sequencer.
 347  */
 348 static inline void asd_ascb_free(struct asd_ascb *ascb)
 349 {
 350         if (ascb) {
 351                 struct asd_ha_struct *asd_ha = ascb->ha;
 352                 unsigned long flags;
 353
 354                 BUG_ON(!list_empty(&ascb->list));
 355                 spin_lock_irqsave(&ascb->ha->seq.tc_index_lock, flags);
 356                 asd_tc_index_release(&ascb->ha->seq, ascb->tc_index);
 357                 spin_unlock_irqrestore(&ascb->ha->seq.tc_index_lock, flags);
 358                 dma_pool_free(asd_ha->scb_pool, ascb->dma_scb.vaddr,
 359                               ascb->dma_scb.dma_handle);
 360                 kmem_cache_free(asd_ascb_cache, ascb);
 361         }
 362 }
 363
 364 /**
 365  * asd_ascb_list_free -- free a list of ascbs
 366  * @ascb_list: a list of ascbs
 367  *
 368  * This function will free a list of ascbs allocated by asd_ascb_alloc_list.
 369  * It is used when say the scb queueing function returned QUEUE_FULL,
 370  * and we do not need the ascbs any more.
 371  */
 372 static inline void asd_ascb_free_list(struct asd_ascb *ascb_list)
 373 {
 374         LIST_HEAD(list);
 375         struct list_head *n, *pos;
 376
 377         __list_add(&list, ascb_list->list.prev, &ascb_list->list);
 378         list_for_each_safe(pos, n, &list) {
 379                 list_del_init(pos);
 380                 asd_ascb_free(list_entry(pos, struct asd_ascb, list));
 381         }
 382 }
 383
 384 /* ---------- Function declarations ---------- */
 385
 386 int  asd_init_hw(struct asd_ha_struct *asd_ha);
 387 irqreturn_t asd_hw_isr(int irq, void *dev_id);
 388
 389
 390 struct asd_ascb *asd_ascb_alloc_list(struct asd_ha_struct
 391                                      *asd_ha, int *num,
 392                                      gfp_t gfp_mask);
 393
 394 int  asd_post_ascb_list(struct asd_ha_struct *asd_ha, struct asd_ascb *ascb,
 395                         int num);
 396 int  asd_post_escb_list(struct asd_ha_struct *asd_ha, struct asd_ascb *ascb,
 397                         int num);
 398
 399 int  asd_init_post_escbs(struct asd_ha_struct *asd_ha);
 400 void asd_build_control_phy(struct asd_ascb *ascb, int phy_id, u8 subfunc);
 401 void asd_control_led(struct asd_ha_struct *asd_ha, int phy_id, int op);
 402 void asd_turn_led(struct asd_ha_struct *asd_ha, int phy_id, int op);
 403 int  asd_enable_phys(struct asd_ha_struct *asd_ha, const u8 phy_mask);
 404 void asd_build_initiate_link_adm_task(struct asd_ascb *ascb, int phy_id,
 405                                       u8 subfunc);
 406
 407 void asd_ascb_timedout(unsigned long data);
 408 int  asd_chip_hardrst(struct asd_ha_struct *asd_ha);
 409
 410 #endif