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 #define QDIO_MAX_QUEUES_PER_IRQ         32
  17 #define QDIO_MAX_BUFFERS_PER_Q          128
  18 #define QDIO_MAX_BUFFERS_MASK           (QDIO_MAX_BUFFERS_PER_Q - 1)
  19 #define QDIO_MAX_ELEMENTS_PER_BUFFER    16
  20 #define QDIO_SBAL_SIZE                  256
  21
  22 #define QDIO_QETH_QFMT                  0
  23 #define QDIO_ZFCP_QFMT                  1
  24 #define QDIO_IQDIO_QFMT                 2
  25
  26 /**
  27  * struct qdesfmt0 - queue descriptor, format 0
  28  * @sliba: storage list information block address
  29  * @sla: storage list address
  30  * @slsba: storage list state block address
  31  * @akey: access key for DLIB
  32  * @bkey: access key for SL
  33  * @ckey: access key for SBALs
  34  * @dkey: access key for SLSB
  35  */
  36 struct qdesfmt0 {
  37         u64 sliba;
  38         u64 sla;
  39         u64 slsba;
  40         u32      : 32;
  41         u32 akey : 4;
  42         u32 bkey : 4;
  43         u32 ckey : 4;
  44         u32 dkey : 4;
  45         u32      : 16;
  46 } __attribute__ ((packed));
  47
  48 /**
  49  * struct qdr - queue description record (QDR)
  50  * @qfmt: queue format
  51  * @pfmt: implementation dependent parameter format
  52  * @ac: adapter characteristics
  53  * @iqdcnt: input queue descriptor count
  54  * @oqdcnt: output queue descriptor count
  55  * @iqdsz: inpout queue descriptor size
  56  * @oqdsz: output queue descriptor size
  57  * @qiba: queue information block address
  58  * @qkey: queue information block key
  59  * @qdf0: queue descriptions
  60  */
  61 struct qdr {
  62         u32 qfmt   : 8;
  63         u32 pfmt   : 8;
  64         u32        : 8;
  65         u32 ac     : 8;
  66         u32        : 8;
  67         u32 iqdcnt : 8;
  68         u32        : 8;
  69         u32 oqdcnt : 8;
  70         u32        : 8;
  71         u32 iqdsz  : 8;
  72         u32        : 8;
  73         u32 oqdsz  : 8;
  74         /* private: */
  75         u32 res[9];
  76         /* public: */
  77         u64 qiba;
  78         u32        : 32;
  79         u32 qkey   : 4;
  80         u32        : 28;
  81         struct qdesfmt0 qdf0[126];
  82 } __attribute__ ((packed, aligned(4096)));
  83
  84 #define QIB_AC_OUTBOUND_PCI_SUPPORTED   0x40
  85 #define QIB_RFLAGS_ENABLE_QEBSM         0x80
  86
  87 /**
  88  * struct qib - queue information block (QIB)
  89  * @qfmt: queue format
  90  * @pfmt: implementation dependent parameter format
  91  * @rflags: QEBSM
  92  * @ac: adapter characteristics
  93  * @isliba: absolute address of first input SLIB
  94  * @osliba: absolute address of first output SLIB
  95  * @ebcnam: adapter identifier in EBCDIC
  96  * @parm: implementation dependent parameters
  97  */
  98 struct qib {
  99         u32 qfmt   : 8;
 100         u32 pfmt   : 8;
 101         u32 rflags : 8;
 102         u32 ac     : 8;
 103         u32        : 32;
 104         u64 isliba;
 105         u64 osliba;
 106         u32        : 32;
 107         u32        : 32;
 108         u8 ebcnam[8];
 109         /* private: */
 110         u8 res[88];
 111         /* public: */
 112         u8 parm[QDIO_MAX_BUFFERS_PER_Q];
 113 } __attribute__ ((packed, aligned(256)));
 114
 115 /**
 116  * struct slibe - storage list information block element (SLIBE)
 117  * @parms: implementation dependent parameters
 118  */
 119 struct slibe {
 120         u64 parms;
 121 };
 122
 123 /**
 124  * struct slib - storage list information block (SLIB)
 125  * @nsliba: next SLIB address (if any)
 126  * @sla: SL address
 127  * @slsba: SLSB address
 128  * @slibe: SLIB elements
 129  */
 130 struct slib {
 131         u64 nsliba;
 132         u64 sla;
 133         u64 slsba;
 134         /* private: */
 135         u8 res[1000];
 136         /* public: */
 137         struct slibe slibe[QDIO_MAX_BUFFERS_PER_Q];
 138 } __attribute__ ((packed, aligned(2048)));
 139
 140 /**
 141  * struct sbal_flags - storage block address list flags
 142  * @last: last entry
 143  * @cont: contiguous storage
 144  * @frag: fragmentation
 145  */
 146 struct sbal_flags {
 147         u8      : 1;
 148         u8 last : 1;
 149         u8 cont : 1;
 150         u8      : 1;
 151         u8 frag : 2;
 152         u8      : 2;
 153 } __attribute__ ((packed));
 154
 155 #define SBAL_FLAGS_FIRST_FRAG           0x04000000UL
 156 #define SBAL_FLAGS_MIDDLE_FRAG          0x08000000UL
 157 #define SBAL_FLAGS_LAST_FRAG            0x0c000000UL
 158 #define SBAL_FLAGS_LAST_ENTRY           0x40000000UL
 159 #define SBAL_FLAGS_CONTIGUOUS           0x20000000UL
 160
 161 #define SBAL_FLAGS0_DATA_CONTINUATION   0x20UL
 162
 163 /* Awesome OpenFCP extensions */
 164 #define SBAL_FLAGS0_TYPE_STATUS         0x00UL
 165 #define SBAL_FLAGS0_TYPE_WRITE          0x08UL
 166 #define SBAL_FLAGS0_TYPE_READ           0x10UL
 167 #define SBAL_FLAGS0_TYPE_WRITE_READ     0x18UL
 168 #define SBAL_FLAGS0_MORE_SBALS          0x04UL
 169 #define SBAL_FLAGS0_COMMAND             0x02UL
 170 #define SBAL_FLAGS0_LAST_SBAL           0x00UL
 171 #define SBAL_FLAGS0_ONLY_SBAL           SBAL_FLAGS0_COMMAND
 172 #define SBAL_FLAGS0_MIDDLE_SBAL         SBAL_FLAGS0_MORE_SBALS
 173 #define SBAL_FLAGS0_FIRST_SBAL SBAL_FLAGS0_MORE_SBALS | SBAL_FLAGS0_COMMAND
 174 #define SBAL_FLAGS0_PCI                 0x40
 175
 176 /**
 177  * struct sbal_sbalf_0 - sbal flags for sbale 0
 178  * @pci: PCI indicator
 179  * @cont: data continuation
 180  * @sbtype: storage-block type (FCP)
 181  */
 182 struct sbal_sbalf_0 {
 183         u8        : 1;
 184         u8 pci    : 1;
 185         u8 cont   : 1;
 186         u8 sbtype : 2;
 187         u8        : 3;
 188 } __attribute__ ((packed));
 189
 190 /**
 191  * struct sbal_sbalf_1 - sbal flags for sbale 1
 192  * @key: storage key
 193  */
 194 struct sbal_sbalf_1 {
 195         u8     : 4;
 196         u8 key : 4;
 197 } __attribute__ ((packed));
 198
 199 /**
 200  * struct sbal_sbalf_14 - sbal flags for sbale 14
 201  * @erridx: error index
 202  */
 203 struct sbal_sbalf_14 {
 204         u8        : 4;
 205         u8 erridx : 4;
 206 } __attribute__ ((packed));
 207
 208 /**
 209  * struct sbal_sbalf_15 - sbal flags for sbale 15
 210  * @reason: reason for error state
 211  */
 212 struct sbal_sbalf_15 {
 213         u8 reason;
 214 } __attribute__ ((packed));
 215
 216 /**
 217  * union sbal_sbalf - storage block address list flags
 218  * @i0: sbalf0
 219  * @i1: sbalf1
 220  * @i14: sbalf14
 221  * @i15: sblaf15
 222  * @value: raw value
 223  */
 224 union sbal_sbalf {
 225         struct sbal_sbalf_0  i0;
 226         struct sbal_sbalf_1  i1;
 227         struct sbal_sbalf_14 i14;
 228         struct sbal_sbalf_15 i15;
 229         u8 value;
 230 };
 231
 232 /**
 233  * struct qdio_buffer_element - SBAL entry
 234  * @flags: flags
 235  * @length: length
 236  * @addr: address
 237 */
 238 struct qdio_buffer_element {
 239         u32 flags;
 240         u32 length;
 241 #ifdef CONFIG_32BIT
 242         /* private: */
 243         void *reserved;
 244         /* public: */
 245 #endif
 246         void *addr;
 247 } __attribute__ ((packed, aligned(16)));
 248
 249 /**
 250  * struct qdio_buffer - storage block address list (SBAL)
 251  * @element: SBAL entries
 252  */
 253 struct qdio_buffer {
 254         struct qdio_buffer_element element[QDIO_MAX_ELEMENTS_PER_BUFFER];
 255 } __attribute__ ((packed, aligned(256)));
 256
 257 /**
 258  * struct sl_element - storage list entry
 259  * @sbal: absolute SBAL address
 260  */
 261 struct sl_element {
 262 #ifdef CONFIG_32BIT
 263         /* private: */
 264         unsigned long reserved;
 265         /* public: */
 266 #endif
 267         unsigned long sbal;
 268 } __attribute__ ((packed));
 269
 270 /**
 271  * struct sl - storage list (SL)
 272  * @element: SL entries
 273  */
 274 struct sl {
 275         struct sl_element element[QDIO_MAX_BUFFERS_PER_Q];
 276 } __attribute__ ((packed, aligned(1024)));
 277
 278 /**
 279  * struct slsb - storage list state block (SLSB)
 280  * @val: state per buffer
 281  */
 282 struct slsb {
 283         u8 val[QDIO_MAX_BUFFERS_PER_Q];
 284 } __attribute__ ((packed, aligned(256)));
 285
 286 struct qdio_ssqd_desc {
 287         u8 flags;
 288         u8:8;
 289         u16 sch;
 290         u8 qfmt;
 291         u8 parm;
 292         u8 qdioac1;
 293         u8 sch_class;
 294         u8 pcnt;
 295         u8 icnt;
 296         u8:8;
 297         u8 ocnt;
 298         u8:8;
 299         u8 mbccnt;
 300         u16 qdioac2;
 301         u64 sch_token;
 302         u64:64;
 303 } __attribute__ ((packed));
 304
 305 /* params are: ccw_device, qdio_error, queue_number,
 306    first element processed, number of elements processed, int_parm */
 307 typedef void qdio_handler_t(struct ccw_device *, unsigned int, int,
 308                             int, int, unsigned long);
 309
 310 /* qdio errors reported to the upper-layer program */
 311 #define QDIO_ERROR_SIGA_ACCESS_EXCEPTION        0x10
 312 #define QDIO_ERROR_SIGA_BUSY                    0x20
 313 #define QDIO_ERROR_ACTIVATE_CHECK_CONDITION     0x40
 314 #define QDIO_ERROR_SLSB_STATE                   0x80
 315
 316 /* for qdio_initialize */
 317 #define QDIO_INBOUND_0COPY_SBALS                0x01
 318 #define QDIO_OUTBOUND_0COPY_SBALS               0x02
 319 #define QDIO_USE_OUTBOUND_PCIS                  0x04
 320
 321 /* for qdio_cleanup */
 322 #define QDIO_FLAG_CLEANUP_USING_CLEAR           0x01
 323 #define QDIO_FLAG_CLEANUP_USING_HALT            0x02
 324
 325 /**
 326  * struct qdio_initialize - qdio initalization data
 327  * @cdev: associated ccw device
 328  * @q_format: queue format
 329  * @adapter_name: name for the adapter
 330  * @qib_param_field_format: format for qib_parm_field
 331  * @qib_param_field: pointer to 128 bytes or NULL, if no param field
 332  * @input_slib_elements: pointer to no_input_qs * 128 words of data or NULL
 333  * @output_slib_elements: pointer to no_output_qs * 128 words of data or NULL
 334  * @no_input_qs: number of input queues
 335  * @no_output_qs: number of output queues
 336  * @input_handler: handler to be called for input queues
 337  * @output_handler: handler to be called for output queues
 338  * @int_parm: interruption parameter
 339  * @flags: initialization flags
 340  * @input_sbal_addr_array:  address of no_input_qs * 128 pointers
 341  * @output_sbal_addr_array: address of no_output_qs * 128 pointers
 342  */
 343 struct qdio_initialize {
 344         struct ccw_device *cdev;
 345         unsigned char q_format;
 346         unsigned char adapter_name[8];
 347         unsigned int qib_param_field_format;
 348         unsigned char *qib_param_field;
 349         unsigned long *input_slib_elements;
 350         unsigned long *output_slib_elements;
 351         unsigned int no_input_qs;
 352         unsigned int no_output_qs;
 353         qdio_handler_t *input_handler;
 354         qdio_handler_t *output_handler;
 355         unsigned long int_parm;
 356         unsigned long flags;
 357         void **input_sbal_addr_array;
 358         void **output_sbal_addr_array;
 359 };
 360
 361 #define QDIO_STATE_INACTIVE             0x00000002 /* after qdio_cleanup */
 362 #define QDIO_STATE_ESTABLISHED          0x00000004 /* after qdio_establish */
 363 #define QDIO_STATE_ACTIVE               0x00000008 /* after qdio_activate */
 364 #define QDIO_STATE_STOPPED              0x00000010 /* after queues went down */
 365
 366 #define QDIO_FLAG_SYNC_INPUT            0x01
 367 #define QDIO_FLAG_SYNC_OUTPUT           0x02
 368 #define QDIO_FLAG_PCI_OUT               0x10
 369
 370 extern int qdio_initialize(struct qdio_initialize *init_data);
 371 extern int qdio_allocate(struct qdio_initialize *init_data);
 372 extern int qdio_establish(struct qdio_initialize *init_data);
 373 extern int qdio_activate(struct ccw_device *);
 374
 375 extern int do_QDIO(struct ccw_device*, unsigned int flags,
 376                    int q_nr, int qidx, int count);
 377 extern int qdio_cleanup(struct ccw_device*, int how);
 378 extern int qdio_shutdown(struct ccw_device*, int how);
 379 extern int qdio_free(struct ccw_device *);
 380 extern struct qdio_ssqd_desc *qdio_get_ssqd_desc(struct ccw_device *cdev);
 381
 382 #endif /* __QDIO_H__ */