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 #define SBAL_EFLAGS_LAST_ENTRY          0x40
 143 #define SBAL_EFLAGS_CONTIGUOUS          0x20
 144 #define SBAL_EFLAGS_FIRST_FRAG          0x04
 145 #define SBAL_EFLAGS_MIDDLE_FRAG         0x08
 146 #define SBAL_EFLAGS_LAST_FRAG           0x0c
 147 #define SBAL_EFLAGS_MASK                0x6f
 148
 149 #define SBAL_SFLAGS0_PCI_REQ            0x40
 150 #define SBAL_SFLAGS0_DATA_CONTINUATION  0x20
 151
 152 /* Awesome OpenFCP extensions */
 153 #define SBAL_SFLAGS0_TYPE_STATUS        0x00
 154 #define SBAL_SFLAGS0_TYPE_WRITE         0x08
 155 #define SBAL_SFLAGS0_TYPE_READ          0x10
 156 #define SBAL_SFLAGS0_TYPE_WRITE_READ    0x18
 157 #define SBAL_SFLAGS0_MORE_SBALS         0x04
 158 #define SBAL_SFLAGS0_COMMAND            0x02
 159 #define SBAL_SFLAGS0_LAST_SBAL          0x00
 160 #define SBAL_SFLAGS0_ONLY_SBAL          SBAL_SFLAGS0_COMMAND
 161 #define SBAL_SFLAGS0_MIDDLE_SBAL        SBAL_SFLAGS0_MORE_SBALS
 162 #define SBAL_SFLAGS0_FIRST_SBAL (SBAL_SFLAGS0_MORE_SBALS | SBAL_SFLAGS0_COMMAND)
 163
 164 /**
 165  * struct qdio_buffer_element - SBAL entry
 166  * @eflags: SBAL entry flags
 167  * @scount: SBAL count
 168  * @sflags: whole SBAL flags
 169  * @length: length
 170  * @addr: address
 171 */
 172 struct qdio_buffer_element {
 173         u8 eflags;
 174         /* private: */
 175         u8 res1;
 176         /* public: */
 177         u8 scount;
 178         u8 sflags;
 179         u32 length;
 180 #ifdef CONFIG_32BIT
 181         /* private: */
 182         void *res2;
 183         /* public: */
 184 #endif
 185         void *addr;
 186 } __attribute__ ((packed, aligned(16)));
 187
 188 /**
 189  * struct qdio_buffer - storage block address list (SBAL)
 190  * @element: SBAL entries
 191  */
 192 struct qdio_buffer {
 193         struct qdio_buffer_element element[QDIO_MAX_ELEMENTS_PER_BUFFER];
 194 } __attribute__ ((packed, aligned(256)));
 195
 196 /**
 197  * struct sl_element - storage list entry
 198  * @sbal: absolute SBAL address
 199  */
 200 struct sl_element {
 201 #ifdef CONFIG_32BIT
 202         /* private: */
 203         unsigned long reserved;
 204         /* public: */
 205 #endif
 206         unsigned long sbal;
 207 } __attribute__ ((packed));
 208
 209 /**
 210  * struct sl - storage list (SL)
 211  * @element: SL entries
 212  */
 213 struct sl {
 214         struct sl_element element[QDIO_MAX_BUFFERS_PER_Q];
 215 } __attribute__ ((packed, aligned(1024)));
 216
 217 /**
 218  * struct slsb - storage list state block (SLSB)
 219  * @val: state per buffer
 220  */
 221 struct slsb {
 222         u8 val[QDIO_MAX_BUFFERS_PER_Q];
 223 } __attribute__ ((packed, aligned(256)));
 224
 225 #define CHSC_AC2_DATA_DIV_AVAILABLE     0x0010
 226 #define CHSC_AC2_DATA_DIV_ENABLED       0x0002
 227
 228 struct qdio_ssqd_desc {
 229         u8 flags;
 230         u8:8;
 231         u16 sch;
 232         u8 qfmt;
 233         u8 parm;
 234         u8 qdioac1;
 235         u8 sch_class;
 236         u8 pcnt;
 237         u8 icnt;
 238         u8:8;
 239         u8 ocnt;
 240         u8:8;
 241         u8 mbccnt;
 242         u16 qdioac2;
 243         u64 sch_token;
 244         u8 mro;
 245         u8 mri;
 246         u8:8;
 247         u8 sbalic;
 248         u16:16;
 249         u8:8;
 250         u8 mmwc;
 251 } __attribute__ ((packed));
 252
 253 /* params are: ccw_device, qdio_error, queue_number,
 254    first element processed, number of elements processed, int_parm */
 255 typedef void qdio_handler_t(struct ccw_device *, unsigned int, int,
 256                             int, int, unsigned long);
 257
 258 /* qdio errors reported to the upper-layer program */
 259 #define QDIO_ERROR_SIGA_TARGET                  0x02
 260 #define QDIO_ERROR_SIGA_ACCESS_EXCEPTION        0x10
 261 #define QDIO_ERROR_SIGA_BUSY                    0x20
 262 #define QDIO_ERROR_ACTIVATE_CHECK_CONDITION     0x40
 263 #define QDIO_ERROR_SLSB_STATE                   0x80
 264
 265 /* for qdio_cleanup */
 266 #define QDIO_FLAG_CLEANUP_USING_CLEAR           0x01
 267 #define QDIO_FLAG_CLEANUP_USING_HALT            0x02
 268
 269 /**
 270  * struct qdio_initialize - qdio initalization data
 271  * @cdev: associated ccw device
 272  * @q_format: queue format
 273  * @adapter_name: name for the adapter
 274  * @qib_param_field_format: format for qib_parm_field
 275  * @qib_param_field: pointer to 128 bytes or NULL, if no param field
 276  * @qib_rflags: rflags to set
 277  * @input_slib_elements: pointer to no_input_qs * 128 words of data or NULL
 278  * @output_slib_elements: pointer to no_output_qs * 128 words of data or NULL
 279  * @no_input_qs: number of input queues
 280  * @no_output_qs: number of output queues
 281  * @input_handler: handler to be called for input queues
 282  * @output_handler: handler to be called for output queues
 283  * @int_parm: interruption parameter
 284  * @input_sbal_addr_array:  address of no_input_qs * 128 pointers
 285  * @output_sbal_addr_array: address of no_output_qs * 128 pointers
 286  */
 287 struct qdio_initialize {
 288         struct ccw_device *cdev;
 289         unsigned char q_format;
 290         unsigned char adapter_name[8];
 291         unsigned int qib_param_field_format;
 292         unsigned char *qib_param_field;
 293         unsigned char qib_rflags;
 294         unsigned long *input_slib_elements;
 295         unsigned long *output_slib_elements;
 296         unsigned int no_input_qs;
 297         unsigned int no_output_qs;
 298         qdio_handler_t *input_handler;
 299         qdio_handler_t *output_handler;
 300         void (*queue_start_poll) (struct ccw_device *, int, unsigned long);
 301         int scan_threshold;
 302         unsigned long int_parm;
 303         void **input_sbal_addr_array;
 304         void **output_sbal_addr_array;
 305 };
 306
 307 #define QDIO_STATE_INACTIVE             0x00000002 /* after qdio_cleanup */
 308 #define QDIO_STATE_ESTABLISHED          0x00000004 /* after qdio_establish */
 309 #define QDIO_STATE_ACTIVE               0x00000008 /* after qdio_activate */
 310 #define QDIO_STATE_STOPPED              0x00000010 /* after queues went down */
 311
 312 #define QDIO_FLAG_SYNC_INPUT            0x01
 313 #define QDIO_FLAG_SYNC_OUTPUT           0x02
 314 #define QDIO_FLAG_PCI_OUT               0x10
 315
 316 extern int qdio_allocate(struct qdio_initialize *);
 317 extern int qdio_establish(struct qdio_initialize *);
 318 extern int qdio_activate(struct ccw_device *);
 319 extern int do_QDIO(struct ccw_device *, unsigned int, int, unsigned int,
 320                    unsigned int);
 321 extern int qdio_start_irq(struct ccw_device *, int);
 322 extern int qdio_stop_irq(struct ccw_device *, int);
 323 extern int qdio_get_next_buffers(struct ccw_device *, int, int *, int *);
 324 extern int qdio_shutdown(struct ccw_device *, int);
 325 extern int qdio_free(struct ccw_device *);
 326 extern int qdio_get_ssqd_desc(struct ccw_device *, struct qdio_ssqd_desc *);
 327
 328 #endif /* __QDIO_H__ */