linux/arch/s390/include/asm/qdio.h
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   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * Copyright IBM Corp. 2000, 2008
   4 * Author(s): Utz Bacher <utz.bacher@de.ibm.com>
   5 *            Jan Glauber <jang@linux.vnet.ibm.com>
   6 *
   7 */
   8#ifndef __QDIO_H__
   9#define __QDIO_H__
  10
  11#include <linux/interrupt.h>
  12#include <asm/cio.h>
  13#include <asm/ccwdev.h>
  14
  15/* only use 4 queues to save some cachelines */
  16#define QDIO_MAX_QUEUES_PER_IRQ         4
  17#define QDIO_MAX_BUFFERS_PER_Q          128
  18#define QDIO_MAX_BUFFERS_MASK           (QDIO_MAX_BUFFERS_PER_Q - 1)
  19#define QDIO_BUFNR(num)                 ((num) & QDIO_MAX_BUFFERS_MASK)
  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: absolute address of storage list information block
  30 * @sla: absolute address of storage list
  31 * @slsba: absolute address of storage list state block
  32 * @akey: access key for SLIB
  33 * @bkey: access key for SL
  34 * @ckey: access key for SBALs
  35 * @dkey: access key for SLSB
  36 */
  37struct 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#define QDR_AC_MULTI_BUFFER_ENABLE 0x01
  50
  51/**
  52 * struct qdr - queue description record (QDR)
  53 * @qfmt: queue format
  54 * @ac: adapter characteristics
  55 * @iqdcnt: input queue descriptor count
  56 * @oqdcnt: output queue descriptor count
  57 * @iqdsz: input queue descriptor size
  58 * @oqdsz: output queue descriptor size
  59 * @qiba: absolute address of queue information block
  60 * @qkey: queue information block key
  61 * @qdf0: queue descriptions
  62 */
  63struct qdr {
  64        u32 qfmt   : 8;
  65        u32        : 16;
  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} __packed __aligned(PAGE_SIZE);
  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 */
 100struct 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[128];
 115} __attribute__ ((packed, aligned(256)));
 116
 117/**
 118 * struct slibe - storage list information block element (SLIBE)
 119 * @parms: implementation dependent parameters
 120 */
 121struct slibe {
 122        u64 parms;
 123};
 124
 125/**
 126 * struct qaob - queue asynchronous operation block
 127 * @res0: reserved parameters
 128 * @res1: reserved parameter
 129 * @res2: reserved parameter
 130 * @res3: reserved parameter
 131 * @aorc: asynchronous operation return code
 132 * @flags: internal flags
 133 * @cbtbs: control block type
 134 * @sb_count: number of storage blocks
 135 * @sba: storage block element addresses
 136 * @dcount: size of storage block elements
 137 * @user0: user defineable value
 138 * @res4: reserved paramater
 139 * @user1: user defineable value
 140 */
 141struct qaob {
 142        u64 res0[6];
 143        u8 res1;
 144        u8 res2;
 145        u8 res3;
 146        u8 aorc;
 147        u8 flags;
 148        u16 cbtbs;
 149        u8 sb_count;
 150        u64 sba[QDIO_MAX_ELEMENTS_PER_BUFFER];
 151        u16 dcount[QDIO_MAX_ELEMENTS_PER_BUFFER];
 152        u64 user0;
 153        u64 res4[2];
 154        u8 user1[16];
 155} __attribute__ ((packed, aligned(256)));
 156
 157/**
 158 * struct slib - storage list information block (SLIB)
 159 * @nsliba: next SLIB address (if any)
 160 * @sla: SL address
 161 * @slsba: SLSB address
 162 * @slibe: SLIB elements
 163 */
 164struct slib {
 165        u64 nsliba;
 166        u64 sla;
 167        u64 slsba;
 168        /* private: */
 169        u8 res[1000];
 170        /* public: */
 171        struct slibe slibe[QDIO_MAX_BUFFERS_PER_Q];
 172} __attribute__ ((packed, aligned(2048)));
 173
 174#define SBAL_EFLAGS_LAST_ENTRY          0x40
 175#define SBAL_EFLAGS_CONTIGUOUS          0x20
 176#define SBAL_EFLAGS_FIRST_FRAG          0x04
 177#define SBAL_EFLAGS_MIDDLE_FRAG         0x08
 178#define SBAL_EFLAGS_LAST_FRAG           0x0c
 179#define SBAL_EFLAGS_MASK                0x6f
 180
 181#define SBAL_SFLAGS0_PCI_REQ            0x40
 182#define SBAL_SFLAGS0_DATA_CONTINUATION  0x20
 183
 184/* Awesome OpenFCP extensions */
 185#define SBAL_SFLAGS0_TYPE_STATUS        0x00
 186#define SBAL_SFLAGS0_TYPE_WRITE         0x08
 187#define SBAL_SFLAGS0_TYPE_READ          0x10
 188#define SBAL_SFLAGS0_TYPE_WRITE_READ    0x18
 189#define SBAL_SFLAGS0_MORE_SBALS         0x04
 190#define SBAL_SFLAGS0_COMMAND            0x02
 191#define SBAL_SFLAGS0_LAST_SBAL          0x00
 192#define SBAL_SFLAGS0_ONLY_SBAL          SBAL_SFLAGS0_COMMAND
 193#define SBAL_SFLAGS0_MIDDLE_SBAL        SBAL_SFLAGS0_MORE_SBALS
 194#define SBAL_SFLAGS0_FIRST_SBAL (SBAL_SFLAGS0_MORE_SBALS | SBAL_SFLAGS0_COMMAND)
 195
 196/**
 197 * struct qdio_buffer_element - SBAL entry
 198 * @eflags: SBAL entry flags
 199 * @scount: SBAL count
 200 * @sflags: whole SBAL flags
 201 * @length: length
 202 * @addr: absolute data address
 203*/
 204struct qdio_buffer_element {
 205        u8 eflags;
 206        /* private: */
 207        u8 res1;
 208        /* public: */
 209        u8 scount;
 210        u8 sflags;
 211        u32 length;
 212        u64 addr;
 213} __attribute__ ((packed, aligned(16)));
 214
 215/**
 216 * struct qdio_buffer - storage block address list (SBAL)
 217 * @element: SBAL entries
 218 */
 219struct qdio_buffer {
 220        struct qdio_buffer_element element[QDIO_MAX_ELEMENTS_PER_BUFFER];
 221} __attribute__ ((packed, aligned(256)));
 222
 223/**
 224 * struct sl_element - storage list entry
 225 * @sbal: absolute SBAL address
 226 */
 227struct sl_element {
 228        u64 sbal;
 229} __attribute__ ((packed));
 230
 231/**
 232 * struct sl - storage list (SL)
 233 * @element: SL entries
 234 */
 235struct sl {
 236        struct sl_element element[QDIO_MAX_BUFFERS_PER_Q];
 237} __attribute__ ((packed, aligned(1024)));
 238
 239/**
 240 * struct slsb - storage list state block (SLSB)
 241 * @val: state per buffer
 242 */
 243struct slsb {
 244        u8 val[QDIO_MAX_BUFFERS_PER_Q];
 245} __attribute__ ((packed, aligned(256)));
 246
 247/* qdio adapter-characteristics-1 flag */
 248#define CHSC_AC1_INITIATE_INPUTQ        0x80
 249#define AC1_SIGA_INPUT_NEEDED           0x40    /* process input queues */
 250#define AC1_SIGA_OUTPUT_NEEDED          0x20    /* process output queues */
 251#define AC1_SIGA_SYNC_NEEDED            0x10    /* ask hypervisor to sync */
 252#define AC1_AUTOMATIC_SYNC_ON_THININT   0x08    /* set by hypervisor */
 253#define AC1_AUTOMATIC_SYNC_ON_OUT_PCI   0x04    /* set by hypervisor */
 254#define AC1_SC_QEBSM_AVAILABLE          0x02    /* available for subchannel */
 255#define AC1_SC_QEBSM_ENABLED            0x01    /* enabled for subchannel */
 256
 257#define CHSC_AC2_MULTI_BUFFER_AVAILABLE 0x0080
 258#define CHSC_AC2_MULTI_BUFFER_ENABLED   0x0040
 259#define CHSC_AC2_DATA_DIV_AVAILABLE     0x0010
 260#define CHSC_AC2_SNIFFER_AVAILABLE      0x0008
 261#define CHSC_AC2_DATA_DIV_ENABLED       0x0002
 262
 263#define CHSC_AC3_FORMAT2_CQ_AVAILABLE   0x8000
 264
 265struct qdio_ssqd_desc {
 266        u8 flags;
 267        u8:8;
 268        u16 sch;
 269        u8 qfmt;
 270        u8 parm;
 271        u8 qdioac1;
 272        u8 sch_class;
 273        u8 pcnt;
 274        u8 icnt;
 275        u8:8;
 276        u8 ocnt;
 277        u8:8;
 278        u8 mbccnt;
 279        u16 qdioac2;
 280        u64 sch_token;
 281        u8 mro;
 282        u8 mri;
 283        u16 qdioac3;
 284        u16:16;
 285        u8:8;
 286        u8 mmwc;
 287} __attribute__ ((packed));
 288
 289/* params are: ccw_device, qdio_error, queue_number,
 290   first element processed, number of elements processed, int_parm */
 291typedef void qdio_handler_t(struct ccw_device *, unsigned int, int,
 292                            int, int, unsigned long);
 293
 294/* qdio errors reported to the upper-layer program */
 295#define QDIO_ERROR_ACTIVATE                     0x0001
 296#define QDIO_ERROR_GET_BUF_STATE                0x0002
 297#define QDIO_ERROR_SET_BUF_STATE                0x0004
 298#define QDIO_ERROR_SLSB_STATE                   0x0100
 299#define QDIO_ERROR_SLSB_PENDING                 0x0200
 300
 301#define QDIO_ERROR_FATAL                        0x00ff
 302#define QDIO_ERROR_TEMPORARY                    0xff00
 303
 304/* for qdio_cleanup */
 305#define QDIO_FLAG_CLEANUP_USING_CLEAR           0x01
 306#define QDIO_FLAG_CLEANUP_USING_HALT            0x02
 307
 308/**
 309 * struct qdio_initialize - qdio initialization data
 310 * @q_format: queue format
 311 * @qdr_ac: feature flags to set
 312 * @qib_param_field_format: format for qib_parm_field
 313 * @qib_param_field: pointer to 128 bytes or NULL, if no param field
 314 * @qib_rflags: rflags to set
 315 * @input_slib_elements: pointer to no_input_qs * 128 words of data or NULL
 316 * @output_slib_elements: pointer to no_output_qs * 128 words of data or NULL
 317 * @no_input_qs: number of input queues
 318 * @no_output_qs: number of output queues
 319 * @input_handler: handler to be called for input queues
 320 * @output_handler: handler to be called for output queues
 321 * @irq_poll: Data IRQ polling handler
 322 * @scan_threshold: # of in-use buffers that triggers scan on output queue
 323 * @int_parm: interruption parameter
 324 * @input_sbal_addr_array:  per-queue array, each element points to 128 SBALs
 325 * @output_sbal_addr_array: per-queue array, each element points to 128 SBALs
 326 */
 327struct qdio_initialize {
 328        unsigned char q_format;
 329        unsigned char qdr_ac;
 330        unsigned int qib_param_field_format;
 331        unsigned char *qib_param_field;
 332        unsigned char qib_rflags;
 333        unsigned long *input_slib_elements;
 334        unsigned long *output_slib_elements;
 335        unsigned int no_input_qs;
 336        unsigned int no_output_qs;
 337        qdio_handler_t *input_handler;
 338        qdio_handler_t *output_handler;
 339        void (*irq_poll)(struct ccw_device *cdev, unsigned long data);
 340        unsigned int scan_threshold;
 341        unsigned long int_parm;
 342        struct qdio_buffer ***input_sbal_addr_array;
 343        struct qdio_buffer ***output_sbal_addr_array;
 344};
 345
 346#define QDIO_STATE_INACTIVE             0x00000002 /* after qdio_cleanup */
 347#define QDIO_STATE_ESTABLISHED          0x00000004 /* after qdio_establish */
 348#define QDIO_STATE_ACTIVE               0x00000008 /* after qdio_activate */
 349#define QDIO_STATE_STOPPED              0x00000010 /* after queues went down */
 350
 351#define QDIO_FLAG_SYNC_INPUT            0x01
 352#define QDIO_FLAG_SYNC_OUTPUT           0x02
 353#define QDIO_FLAG_PCI_OUT               0x10
 354
 355int qdio_alloc_buffers(struct qdio_buffer **buf, unsigned int count);
 356void qdio_free_buffers(struct qdio_buffer **buf, unsigned int count);
 357void qdio_reset_buffers(struct qdio_buffer **buf, unsigned int count);
 358
 359extern int qdio_allocate(struct ccw_device *cdev, unsigned int no_input_qs,
 360                         unsigned int no_output_qs);
 361extern int qdio_establish(struct ccw_device *cdev,
 362                          struct qdio_initialize *init_data);
 363extern int qdio_activate(struct ccw_device *);
 364extern struct qaob *qdio_allocate_aob(void);
 365extern void qdio_release_aob(struct qaob *);
 366extern int do_QDIO(struct ccw_device *cdev, unsigned int callflags, int q_nr,
 367                   unsigned int bufnr, unsigned int count, struct qaob *aob);
 368extern int qdio_start_irq(struct ccw_device *cdev);
 369extern int qdio_stop_irq(struct ccw_device *cdev);
 370extern int qdio_get_next_buffers(struct ccw_device *, int, int *, int *);
 371extern int qdio_inspect_queue(struct ccw_device *cdev, unsigned int nr,
 372                              bool is_input, unsigned int *bufnr,
 373                              unsigned int *error);
 374extern int qdio_shutdown(struct ccw_device *, int);
 375extern int qdio_free(struct ccw_device *);
 376extern int qdio_get_ssqd_desc(struct ccw_device *, struct qdio_ssqd_desc *);
 377
 378#endif /* __QDIO_H__ */
 379
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