arch/s390/include/asm/qdio.h

   1 /*
   2  * linux/include/asm-s390/qdio.h
   3  *
   4  * Copyright 2000,2008 IBM Corp.
   5  * Author(s): Utz Bacher <utz.bacher@de.ibm.com>
   6  *            Jan Glauber <jang@linux.vnet.ibm.com>
   7  *
   8  */
   9 #ifndef __QDIO_H__
  10 #define __QDIO_H__
  11
  12 #include <linux/interrupt.h>
  13 #include <asm/cio.h>
  14 #include <asm/ccwdev.h>
  15
  16 /* only use 4 queues to save some cachelines */
  17 #define QDIO_MAX_QUEUES_PER_IRQ         4
  18 #define QDIO_MAX_BUFFERS_PER_Q          128
  19 #define QDIO_MAX_BUFFERS_MASK           (QDIO_MAX_BUFFERS_PER_Q - 1)
  20 #define QDIO_MAX_ELEMENTS_PER_BUFFER    16
  21 #define QDIO_SBAL_SIZE                  256
  22
  23 #define QDIO_QETH_QFMT                  0
  24 #define QDIO_ZFCP_QFMT                  1
  25 #define QDIO_IQDIO_QFMT                 2
  26
  27 /**
  28  * struct qdesfmt0 - queue descriptor, format 0
  29  * @sliba: storage list information block address
  30  * @sla: storage list address
  31  * @slsba: storage list state block address
  32  * @akey: access key for DLIB
  33  * @bkey: access key for SL
  34  * @ckey: access key for SBALs
  35  * @dkey: access key for SLSB
  36  */
  37 struct qdesfmt0 {
  38         u64 sliba;
  39         u64 sla;
  40         u64 slsba;
  41         u32      : 32;
  42         u32 akey : 4;
  43         u32 bkey : 4;
  44         u32 ckey : 4;
  45         u32 dkey : 4;
  46         u32      : 16;
  47 } __attribute__ ((packed));
  48
  49 /**
  50  * struct qdr - queue description record (QDR)
  51  * @qfmt: queue format
  52  * @pfmt: implementation dependent parameter format
  53  * @ac: adapter characteristics
  54  * @iqdcnt: input queue descriptor count
  55  * @oqdcnt: output queue descriptor count
  56  * @iqdsz: inpout queue descriptor size
  57  * @oqdsz: output queue descriptor size
  58  * @qiba: queue information block address
  59  * @qkey: queue information block key
  60  * @qdf0: queue descriptions
  61  */
  62 struct qdr {
  63         u32 qfmt   : 8;
  64         u32 pfmt   : 8;
  65         u32        : 8;
  66         u32 ac     : 8;
  67         u32        : 8;
  68         u32 iqdcnt : 8;
  69         u32        : 8;
  70         u32 oqdcnt : 8;
  71         u32        : 8;
  72         u32 iqdsz  : 8;
  73         u32        : 8;
  74         u32 oqdsz  : 8;
  75         /* private: */
  76         u32 res[9];
  77         /* public: */
  78         u64 qiba;
  79         u32        : 32;
  80         u32 qkey   : 4;
  81         u32        : 28;
  82         struct qdesfmt0 qdf0[126];
  83 } __attribute__ ((packed, aligned(4096)));
  84
  85 #define QIB_AC_OUTBOUND_PCI_SUPPORTED   0x40
  86 #define QIB_RFLAGS_ENABLE_QEBSM         0x80
  87 #define QIB_RFLAGS_ENABLE_DATA_DIV      0x02
  88
  89 /**
  90  * struct qib - queue information block (QIB)
  91  * @qfmt: queue format
  92  * @pfmt: implementation dependent parameter format
  93  * @rflags: QEBSM
  94  * @ac: adapter characteristics
  95  * @isliba: absolute address of first input SLIB
  96  * @osliba: absolute address of first output SLIB
  97  * @ebcnam: adapter identifier in EBCDIC
  98  * @parm: implementation dependent parameters
  99  */
 100 struct qib {
 101         u32 qfmt   : 8;
 102         u32 pfmt   : 8;
 103         u32 rflags : 8;
 104         u32 ac     : 8;
 105         u32        : 32;
 106         u64 isliba;
 107         u64 osliba;
 108         u32        : 32;
 109         u32        : 32;
 110         u8 ebcnam[8];
 111         /* private: */
 112         u8 res[88];
 113         /* public: */
 114         u8 parm[QDIO_MAX_BUFFERS_PER_Q];
 115 } __attribute__ ((packed, aligned(256)));
 116
 117 /**
 118  * struct slibe - storage list information block element (SLIBE)
 119  * @parms: implementation dependent parameters
 120  */
 121 struct slibe {
 122         u64 parms;
 123 };
 124
 125 /**
 126  * struct slib - storage list information block (SLIB)
 127  * @nsliba: next SLIB address (if any)
 128  * @sla: SL address
 129  * @slsba: SLSB address
 130  * @slibe: SLIB elements
 131  */
 132 struct slib {
 133         u64 nsliba;
 134         u64 sla;
 135         u64 slsba;
 136         /* private: */
 137         u8 res[1000];
 138         /* public: */
 139         struct slibe slibe[QDIO_MAX_BUFFERS_PER_Q];
 140 } __attribute__ ((packed, aligned(2048)));
 141
 142 /**
 143  * struct sbal_flags - storage block address list flags
 144  * @last: last entry
 145  * @cont: contiguous storage
 146  * @frag: fragmentation
 147  */
 148 struct sbal_flags {
 149         u8      : 1;
 150         u8 last : 1;
 151         u8 cont : 1;
 152         u8      : 1;
 153         u8 frag : 2;
 154         u8      : 2;
 155 } __attribute__ ((packed));
 156
 157 #define SBAL_FLAGS_FIRST_FRAG           0x04000000UL
 158 #define SBAL_FLAGS_MIDDLE_FRAG          0x08000000UL
 159 #define SBAL_FLAGS_LAST_FRAG            0x0c000000UL
 160 #define SBAL_FLAGS_LAST_ENTRY           0x40000000UL
 161 #define SBAL_FLAGS_CONTIGUOUS           0x20000000UL
 162
 163 #define SBAL_FLAGS0_DATA_CONTINUATION   0x20UL
 164
 165 /* Awesome OpenFCP extensions */
 166 #define SBAL_FLAGS0_TYPE_STATUS         0x00UL
 167 #define SBAL_FLAGS0_TYPE_WRITE          0x08UL
 168 #define SBAL_FLAGS0_TYPE_READ           0x10UL
 169 #define SBAL_FLAGS0_TYPE_WRITE_READ     0x18UL
 170 #define SBAL_FLAGS0_MORE_SBALS          0x04UL
 171 #define SBAL_FLAGS0_COMMAND             0x02UL
 172 #define SBAL_FLAGS0_LAST_SBAL           0x00UL
 173 #define SBAL_FLAGS0_ONLY_SBAL           SBAL_FLAGS0_COMMAND
 174 #define SBAL_FLAGS0_MIDDLE_SBAL         SBAL_FLAGS0_MORE_SBALS
 175 #define SBAL_FLAGS0_FIRST_SBAL SBAL_FLAGS0_MORE_SBALS | SBAL_FLAGS0_COMMAND
 176 #define SBAL_FLAGS0_PCI                 0x40
 177
 178 /**
 179  * struct sbal_sbalf_0 - sbal flags for sbale 0
 180  * @pci: PCI indicator
 181  * @cont: data continuation
 182  * @sbtype: storage-block type (FCP)
 183  */
 184 struct sbal_sbalf_0 {
 185         u8        : 1;
 186         u8 pci    : 1;
 187         u8 cont   : 1;
 188         u8 sbtype : 2;
 189         u8        : 3;
 190 } __attribute__ ((packed));
 191
 192 /**
 193  * struct sbal_sbalf_1 - sbal flags for sbale 1
 194  * @key: storage key
 195  */
 196 struct sbal_sbalf_1 {
 197         u8     : 4;
 198         u8 key : 4;
 199 } __attribute__ ((packed));
 200
 201 /**
 202  * struct sbal_sbalf_14 - sbal flags for sbale 14
 203  * @erridx: error index
 204  */
 205 struct sbal_sbalf_14 {
 206         u8        : 4;
 207         u8 erridx : 4;
 208 } __attribute__ ((packed));
 209
 210 /**
 211  * struct sbal_sbalf_15 - sbal flags for sbale 15
 212  * @reason: reason for error state
 213  */
 214 struct sbal_sbalf_15 {
 215         u8 reason;
 216 } __attribute__ ((packed));
 217
 218 /**
 219  * union sbal_sbalf - storage block address list flags
 220  * @i0: sbalf0
 221  * @i1: sbalf1
 222  * @i14: sbalf14
 223  * @i15: sblaf15
 224  * @value: raw value
 225  */
 226 union sbal_sbalf {
 227         struct sbal_sbalf_0  i0;
 228         struct sbal_sbalf_1  i1;
 229         struct sbal_sbalf_14 i14;
 230         struct sbal_sbalf_15 i15;
 231         u8 value;
 232 };
 233
 234 /**
 235  * struct qdio_buffer_element - SBAL entry
 236  * @flags: flags
 237  * @length: length
 238  * @addr: address
 239 */
 240 struct qdio_buffer_element {
 241         u32 flags;
 242         u32 length;
 243 #ifdef CONFIG_32BIT
 244         /* private: */
 245         void *reserved;
 246         /* public: */
 247 #endif
 248         void *addr;
 249 } __attribute__ ((packed, aligned(16)));
 250
 251 /**
 252  * struct qdio_buffer - storage block address list (SBAL)
 253  * @element: SBAL entries
 254  */
 255 struct qdio_buffer {
 256         struct qdio_buffer_element element[QDIO_MAX_ELEMENTS_PER_BUFFER];
 257 } __attribute__ ((packed, aligned(256)));
 258
 259 /**
 260  * struct sl_element - storage list entry
 261  * @sbal: absolute SBAL address
 262  */
 263 struct sl_element {
 264 #ifdef CONFIG_32BIT
 265         /* private: */
 266         unsigned long reserved;
 267         /* public: */
 268 #endif
 269         unsigned long sbal;
 270 } __attribute__ ((packed));
 271
 272 /**
 273  * struct sl - storage list (SL)
 274  * @element: SL entries
 275  */
 276 struct sl {
 277         struct sl_element element[QDIO_MAX_BUFFERS_PER_Q];
 278 } __attribute__ ((packed, aligned(1024)));
 279
 280 /**
 281  * struct slsb - storage list state block (SLSB)
 282  * @val: state per buffer
 283  */
 284 struct slsb {
 285         u8 val[QDIO_MAX_BUFFERS_PER_Q];
 286 } __attribute__ ((packed, aligned(256)));
 287
 288 #define CHSC_AC2_DATA_DIV_AVAILABLE     0x0010
 289 #define CHSC_AC2_DATA_DIV_ENABLED       0x0002
 290
 291 struct qdio_ssqd_desc {
 292         u8 flags;
 293         u8:8;
 294         u16 sch;
 295         u8 qfmt;
 296         u8 parm;
 297         u8 qdioac1;
 298         u8 sch_class;
 299         u8 pcnt;
 300         u8 icnt;
 301         u8:8;
 302         u8 ocnt;
 303         u8:8;
 304         u8 mbccnt;
 305         u16 qdioac2;
 306         u64 sch_token;
 307         u8 mro;
 308         u8 mri;
 309         u8:8;
 310         u8 sbalic;
 311         u16:16;
 312         u8:8;
 313         u8 mmwc;
 314 } __attribute__ ((packed));
 315
 316 /* params are: ccw_device, qdio_error, queue_number,
 317    first element processed, number of elements processed, int_parm */
 318 typedef void qdio_handler_t(struct ccw_device *, unsigned int, int,
 319                             int, int, unsigned long);
 320
 321 /* qdio errors reported to the upper-layer program */
 322 #define QDIO_ERROR_SIGA_TARGET                  0x02
 323 #define QDIO_ERROR_SIGA_ACCESS_EXCEPTION        0x10
 324 #define QDIO_ERROR_SIGA_BUSY                    0x20
 325 #define QDIO_ERROR_ACTIVATE_CHECK_CONDITION     0x40
 326 #define QDIO_ERROR_SLSB_STATE                   0x80
 327
 328 /* for qdio_cleanup */
 329 #define QDIO_FLAG_CLEANUP_USING_CLEAR           0x01
 330 #define QDIO_FLAG_CLEANUP_USING_HALT            0x02
 331
 332 /**
 333  * struct qdio_initialize - qdio initalization data
 334  * @cdev: associated ccw device
 335  * @q_format: queue format
 336  * @adapter_name: name for the adapter
 337  * @qib_param_field_format: format for qib_parm_field
 338  * @qib_param_field: pointer to 128 bytes or NULL, if no param field
 339  * @qib_rflags: rflags to set
 340  * @input_slib_elements: pointer to no_input_qs * 128 words of data or NULL
 341  * @output_slib_elements: pointer to no_output_qs * 128 words of data or NULL
 342  * @no_input_qs: number of input queues
 343  * @no_output_qs: number of output queues
 344  * @input_handler: handler to be called for input queues
 345  * @output_handler: handler to be called for output queues
 346  * @int_parm: interruption parameter
 347  * @input_sbal_addr_array:  address of no_input_qs * 128 pointers
 348  * @output_sbal_addr_array: address of no_output_qs * 128 pointers
 349  */
 350 struct qdio_initialize {
 351         struct ccw_device *cdev;
 352         unsigned char q_format;
 353         unsigned char adapter_name[8];
 354         unsigned int qib_param_field_format;
 355         unsigned char *qib_param_field;
 356         unsigned char qib_rflags;
 357         unsigned long *input_slib_elements;
 358         unsigned long *output_slib_elements;
 359         unsigned int no_input_qs;
 360         unsigned int no_output_qs;
 361         qdio_handler_t *input_handler;
 362         qdio_handler_t *output_handler;
 363         void (*queue_start_poll) (struct ccw_device *, int, unsigned long);
 364         unsigned long int_parm;
 365         void **input_sbal_addr_array;
 366         void **output_sbal_addr_array;
 367 };
 368
 369 #define QDIO_STATE_INACTIVE             0x00000002 /* after qdio_cleanup */
 370 #define QDIO_STATE_ESTABLISHED          0x00000004 /* after qdio_establish */
 371 #define QDIO_STATE_ACTIVE               0x00000008 /* after qdio_activate */
 372 #define QDIO_STATE_STOPPED              0x00000010 /* after queues went down */
 373
 374 #define QDIO_FLAG_SYNC_INPUT            0x01
 375 #define QDIO_FLAG_SYNC_OUTPUT           0x02
 376 #define QDIO_FLAG_PCI_OUT               0x10
 377
 378 extern int qdio_allocate(struct qdio_initialize *);
 379 extern int qdio_establish(struct qdio_initialize *);
 380 extern int qdio_activate(struct ccw_device *);
 381 extern int do_QDIO(struct ccw_device *, unsigned int, int, unsigned int,
 382                    unsigned int);
 383 extern int qdio_start_irq(struct ccw_device *, int);
 384 extern int qdio_stop_irq(struct ccw_device *, int);
 385 extern int qdio_get_next_buffers(struct ccw_device *, int, int *, int *);
 386 extern int qdio_shutdown(struct ccw_device *, int);
 387 extern int qdio_free(struct ccw_device *);
 388 extern int qdio_get_ssqd_desc(struct ccw_device *, struct qdio_ssqd_desc *);
 389
 390 #endif /* __QDIO_H__ */