root/arch/s390/include/asm/qdio.h

INCLUDED FROM

   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: storage list information block address
  30  * @sla: storage list address
  31  * @slsba: storage list state block address
  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  */
  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 #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: queue information block address
  60  * @qkey: queue information block key
  61  * @qdf0: queue descriptions
  62  */
  63 struct 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  */
 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[128];
 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 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  * @user2: user defineable value
 141  */
 142 struct qaob {
 143         u64 res0[6];
 144         u8 res1;
 145         u8 res2;
 146         u8 res3;
 147         u8 aorc;
 148         u8 flags;
 149         u16 cbtbs;
 150         u8 sb_count;
 151         u64 sba[QDIO_MAX_ELEMENTS_PER_BUFFER];
 152         u16 dcount[QDIO_MAX_ELEMENTS_PER_BUFFER];
 153         u64 user0;
 154         u64 res4[2];
 155         u64 user1;
 156         u64 user2;
 157 } __attribute__ ((packed, aligned(256)));
 158 
 159 /**
 160  * struct slib - storage list information block (SLIB)
 161  * @nsliba: next SLIB address (if any)
 162  * @sla: SL address
 163  * @slsba: SLSB address
 164  * @slibe: SLIB elements
 165  */
 166 struct slib {
 167         u64 nsliba;
 168         u64 sla;
 169         u64 slsba;
 170         /* private: */
 171         u8 res[1000];
 172         /* public: */
 173         struct slibe slibe[QDIO_MAX_BUFFERS_PER_Q];
 174 } __attribute__ ((packed, aligned(2048)));
 175 
 176 #define SBAL_EFLAGS_LAST_ENTRY          0x40
 177 #define SBAL_EFLAGS_CONTIGUOUS          0x20
 178 #define SBAL_EFLAGS_FIRST_FRAG          0x04
 179 #define SBAL_EFLAGS_MIDDLE_FRAG         0x08
 180 #define SBAL_EFLAGS_LAST_FRAG           0x0c
 181 #define SBAL_EFLAGS_MASK                0x6f
 182 
 183 #define SBAL_SFLAGS0_PCI_REQ            0x40
 184 #define SBAL_SFLAGS0_DATA_CONTINUATION  0x20
 185 
 186 /* Awesome OpenFCP extensions */
 187 #define SBAL_SFLAGS0_TYPE_STATUS        0x00
 188 #define SBAL_SFLAGS0_TYPE_WRITE         0x08
 189 #define SBAL_SFLAGS0_TYPE_READ          0x10
 190 #define SBAL_SFLAGS0_TYPE_WRITE_READ    0x18
 191 #define SBAL_SFLAGS0_MORE_SBALS         0x04
 192 #define SBAL_SFLAGS0_COMMAND            0x02
 193 #define SBAL_SFLAGS0_LAST_SBAL          0x00
 194 #define SBAL_SFLAGS0_ONLY_SBAL          SBAL_SFLAGS0_COMMAND
 195 #define SBAL_SFLAGS0_MIDDLE_SBAL        SBAL_SFLAGS0_MORE_SBALS
 196 #define SBAL_SFLAGS0_FIRST_SBAL (SBAL_SFLAGS0_MORE_SBALS | SBAL_SFLAGS0_COMMAND)
 197 
 198 /**
 199  * struct qdio_buffer_element - SBAL entry
 200  * @eflags: SBAL entry flags
 201  * @scount: SBAL count
 202  * @sflags: whole SBAL flags
 203  * @length: length
 204  * @addr: address
 205 */
 206 struct qdio_buffer_element {
 207         u8 eflags;
 208         /* private: */
 209         u8 res1;
 210         /* public: */
 211         u8 scount;
 212         u8 sflags;
 213         u32 length;
 214         void *addr;
 215 } __attribute__ ((packed, aligned(16)));
 216 
 217 /**
 218  * struct qdio_buffer - storage block address list (SBAL)
 219  * @element: SBAL entries
 220  */
 221 struct qdio_buffer {
 222         struct qdio_buffer_element element[QDIO_MAX_ELEMENTS_PER_BUFFER];
 223 } __attribute__ ((packed, aligned(256)));
 224 
 225 /**
 226  * struct sl_element - storage list entry
 227  * @sbal: absolute SBAL address
 228  */
 229 struct sl_element {
 230         u64 sbal;
 231 } __attribute__ ((packed));
 232 
 233 /**
 234  * struct sl - storage list (SL)
 235  * @element: SL entries
 236  */
 237 struct sl {
 238         struct sl_element element[QDIO_MAX_BUFFERS_PER_Q];
 239 } __attribute__ ((packed, aligned(1024)));
 240 
 241 /**
 242  * struct slsb - storage list state block (SLSB)
 243  * @val: state per buffer
 244  */
 245 struct slsb {
 246         u8 val[QDIO_MAX_BUFFERS_PER_Q];
 247 } __attribute__ ((packed, aligned(256)));
 248 
 249 /**
 250  * struct qdio_outbuf_state - SBAL related asynchronous operation information
 251  *   (for communication with upper layer programs)
 252  *   (only required for use with completion queues)
 253  * @flags: flags indicating state of buffer
 254  * @user: pointer to upper layer program's state information related to SBAL
 255  *        (stored in user1 data of QAOB)
 256  */
 257 struct qdio_outbuf_state {
 258         u8 flags;
 259         void *user;
 260 };
 261 
 262 #define QDIO_OUTBUF_STATE_FLAG_PENDING  0x01
 263 
 264 #define CHSC_AC1_INITIATE_INPUTQ        0x80
 265 
 266 
 267 /* qdio adapter-characteristics-1 flag */
 268 #define AC1_SIGA_INPUT_NEEDED           0x40    /* process input queues */
 269 #define AC1_SIGA_OUTPUT_NEEDED          0x20    /* process output queues */
 270 #define AC1_SIGA_SYNC_NEEDED            0x10    /* ask hypervisor to sync */
 271 #define AC1_AUTOMATIC_SYNC_ON_THININT   0x08    /* set by hypervisor */
 272 #define AC1_AUTOMATIC_SYNC_ON_OUT_PCI   0x04    /* set by hypervisor */
 273 #define AC1_SC_QEBSM_AVAILABLE          0x02    /* available for subchannel */
 274 #define AC1_SC_QEBSM_ENABLED            0x01    /* enabled for subchannel */
 275 
 276 #define CHSC_AC2_MULTI_BUFFER_AVAILABLE 0x0080
 277 #define CHSC_AC2_MULTI_BUFFER_ENABLED   0x0040
 278 #define CHSC_AC2_DATA_DIV_AVAILABLE     0x0010
 279 #define CHSC_AC2_DATA_DIV_ENABLED       0x0002
 280 
 281 #define CHSC_AC3_FORMAT2_CQ_AVAILABLE   0x8000
 282 
 283 struct qdio_ssqd_desc {
 284         u8 flags;
 285         u8:8;
 286         u16 sch;
 287         u8 qfmt;
 288         u8 parm;
 289         u8 qdioac1;
 290         u8 sch_class;
 291         u8 pcnt;
 292         u8 icnt;
 293         u8:8;
 294         u8 ocnt;
 295         u8:8;
 296         u8 mbccnt;
 297         u16 qdioac2;
 298         u64 sch_token;
 299         u8 mro;
 300         u8 mri;
 301         u16 qdioac3;
 302         u16:16;
 303         u8:8;
 304         u8 mmwc;
 305 } __attribute__ ((packed));
 306 
 307 /* params are: ccw_device, qdio_error, queue_number,
 308    first element processed, number of elements processed, int_parm */
 309 typedef void qdio_handler_t(struct ccw_device *, unsigned int, int,
 310                             int, int, unsigned long);
 311 
 312 /* qdio errors reported to the upper-layer program */
 313 #define QDIO_ERROR_ACTIVATE                     0x0001
 314 #define QDIO_ERROR_GET_BUF_STATE                0x0002
 315 #define QDIO_ERROR_SET_BUF_STATE                0x0004
 316 #define QDIO_ERROR_SLSB_STATE                   0x0100
 317 
 318 #define QDIO_ERROR_FATAL                        0x00ff
 319 #define QDIO_ERROR_TEMPORARY                    0xff00
 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 initialization data
 327  * @cdev: associated ccw device
 328  * @q_format: queue format
 329  * @qdr_ac: feature flags to set
 330  * @adapter_name: name for the adapter
 331  * @qib_param_field_format: format for qib_parm_field
 332  * @qib_param_field: pointer to 128 bytes or NULL, if no param field
 333  * @qib_rflags: rflags to set
 334  * @input_slib_elements: pointer to no_input_qs * 128 words of data or NULL
 335  * @output_slib_elements: pointer to no_output_qs * 128 words of data or NULL
 336  * @no_input_qs: number of input queues
 337  * @no_output_qs: number of output queues
 338  * @input_handler: handler to be called for input queues
 339  * @output_handler: handler to be called for output queues
 340  * @queue_start_poll_array: polling handlers (one per input queue or NULL)
 341  * @scan_threshold: # of in-use buffers that triggers scan on output queue
 342  * @int_parm: interruption parameter
 343  * @input_sbal_addr_array:  address of no_input_qs * 128 pointers
 344  * @output_sbal_addr_array: address of no_output_qs * 128 pointers
 345  * @output_sbal_state_array: no_output_qs * 128 state info (for CQ or NULL)
 346  */
 347 struct qdio_initialize {
 348         struct ccw_device *cdev;
 349         unsigned char q_format;
 350         unsigned char qdr_ac;
 351         unsigned char adapter_name[8];
 352         unsigned int qib_param_field_format;
 353         unsigned char *qib_param_field;
 354         unsigned char qib_rflags;
 355         unsigned long *input_slib_elements;
 356         unsigned long *output_slib_elements;
 357         unsigned int no_input_qs;
 358         unsigned int no_output_qs;
 359         qdio_handler_t *input_handler;
 360         qdio_handler_t *output_handler;
 361         void (**queue_start_poll_array) (struct ccw_device *, int,
 362                                           unsigned long);
 363         unsigned int scan_threshold;
 364         unsigned long int_parm;
 365         struct qdio_buffer **input_sbal_addr_array;
 366         struct qdio_buffer **output_sbal_addr_array;
 367         struct qdio_outbuf_state *output_sbal_state_array;
 368 };
 369 
 370 /**
 371  * enum qdio_brinfo_entry_type - type of address entry for qdio_brinfo_desc()
 372  * @l3_ipv6_addr: entry contains IPv6 address
 373  * @l3_ipv4_addr: entry contains IPv4 address
 374  * @l2_addr_lnid: entry contains MAC address and VLAN ID
 375  */
 376 enum qdio_brinfo_entry_type {l3_ipv6_addr, l3_ipv4_addr, l2_addr_lnid};
 377 
 378 /**
 379  * struct qdio_brinfo_entry_XXX - Address entry for qdio_brinfo_desc()
 380  * @nit:  Network interface token
 381  * @addr: Address of one of the three types
 382  *
 383  * The struct is passed to the callback function by qdio_brinfo_desc()
 384  */
 385 struct qdio_brinfo_entry_l3_ipv6 {
 386         u64 nit;
 387         struct { unsigned char _s6_addr[16]; } addr;
 388 } __packed;
 389 struct qdio_brinfo_entry_l3_ipv4 {
 390         u64 nit;
 391         struct { uint32_t _s_addr; } addr;
 392 } __packed;
 393 struct qdio_brinfo_entry_l2 {
 394         u64 nit;
 395         struct { u8 mac[6]; u16 lnid; } addr_lnid;
 396 } __packed;
 397 
 398 #define QDIO_STATE_INACTIVE             0x00000002 /* after qdio_cleanup */
 399 #define QDIO_STATE_ESTABLISHED          0x00000004 /* after qdio_establish */
 400 #define QDIO_STATE_ACTIVE               0x00000008 /* after qdio_activate */
 401 #define QDIO_STATE_STOPPED              0x00000010 /* after queues went down */
 402 
 403 #define QDIO_FLAG_SYNC_INPUT            0x01
 404 #define QDIO_FLAG_SYNC_OUTPUT           0x02
 405 #define QDIO_FLAG_PCI_OUT               0x10
 406 
 407 int qdio_alloc_buffers(struct qdio_buffer **buf, unsigned int count);
 408 void qdio_free_buffers(struct qdio_buffer **buf, unsigned int count);
 409 void qdio_reset_buffers(struct qdio_buffer **buf, unsigned int count);
 410 
 411 extern int qdio_allocate(struct qdio_initialize *);
 412 extern int qdio_establish(struct qdio_initialize *);
 413 extern int qdio_activate(struct ccw_device *);
 414 extern void qdio_release_aob(struct qaob *);
 415 extern int do_QDIO(struct ccw_device *, unsigned int, int, unsigned int,
 416                    unsigned int);
 417 extern int qdio_start_irq(struct ccw_device *, int);
 418 extern int qdio_stop_irq(struct ccw_device *, int);
 419 extern int qdio_get_next_buffers(struct ccw_device *, int, int *, int *);
 420 extern int qdio_inspect_queue(struct ccw_device *cdev, unsigned int nr,
 421                               bool is_input, unsigned int *bufnr,
 422                               unsigned int *error);
 423 extern int qdio_shutdown(struct ccw_device *, int);
 424 extern int qdio_free(struct ccw_device *);
 425 extern int qdio_get_ssqd_desc(struct ccw_device *, struct qdio_ssqd_desc *);
 426 extern int qdio_pnso_brinfo(struct subchannel_id schid,
 427                 int cnc, u16 *response,
 428                 void (*cb)(void *priv, enum qdio_brinfo_entry_type type,
 429                                 void *entry),
 430                 void *priv);
 431 
 432 #endif /* __QDIO_H__ */