[PATCH] s390: 64 bit diag250 support
authorHorst Hummel <horst.hummel@de.ibm.com>
Sat, 3 Sep 2005 22:58:00 +0000 (15:58 -0700)
committerLinus Torvalds <torvalds@evo.osdl.org>
Mon, 5 Sep 2005 07:06:27 +0000 (00:06 -0700)
Add support for diag 250 access to dasd devices for 64 bit kernels.  In
addition fix detach/attach for diag disks.  The VM control block needs to get
recreated by a call to mdsk_init_io.

Signed-off-by: Horst Hummel <horst.hummel@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
drivers/s390/block/Kconfig
drivers/s390/block/dasd_diag.c
drivers/s390/block/dasd_diag.h

index dc1c89dbdb8f57a470cd1bb811ac889654087231..6e7d7b06421d233f1521568656bd193a6b9f7bee 100644 (file)
@@ -49,7 +49,7 @@ config DASD_FBA
 
 config DASD_DIAG
        tristate "Support for DIAG access to Disks"
-       depends on DASD && ARCH_S390X = 'n'
+       depends on DASD && ( ARCH_S390X = 'n' || EXPERIMENTAL)
        help
          Select this option if you want to use Diagnose250 command to access
          Disks under VM.  If you are not running under VM or unsure what it is,
index 127699830fa18a46ee98836af72ebdbf16d89f1e..7478423b53bb2e6b1ae09f4296466c0998344e08 100644 (file)
@@ -6,17 +6,18 @@
  * Bugreports.to..: <Linux390@de.ibm.com>
  * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
  *
- * $Revision: 1.42 $
+ * $Revision: 1.49 $
  */
 
 #include <linux/config.h>
 #include <linux/stddef.h>
 #include <linux/kernel.h>
 #include <linux/slab.h>
-#include <linux/hdreg.h>       /* HDIO_GETGEO                      */
+#include <linux/hdreg.h>
 #include <linux/bio.h>
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/jiffies.h>
 
 #include <asm/dasd.h>
 #include <asm/debug.h>
 #include "dasd_int.h"
 #include "dasd_diag.h"
 
-#ifdef PRINTK_HEADER
-#undef PRINTK_HEADER
-#endif                         /* PRINTK_HEADER */
 #define PRINTK_HEADER "dasd(diag):"
 
 MODULE_LICENSE("GPL");
 
+/* The maximum number of blocks per request (max_blocks) is dependent on the
+ * amount of storage that is available in the static I/O buffer for each
+ * device. Currently each device gets 2 pages. We want to fit two requests
+ * into the available memory so that we can immediately start the next if one
+ * finishes. */
+#define DIAG_MAX_BLOCKS        (((2 * PAGE_SIZE - sizeof(struct dasd_ccw_req) - \
+                          sizeof(struct dasd_diag_req)) / \
+                          sizeof(struct dasd_diag_bio)) / 2)
+#define DIAG_MAX_RETRIES       32
+#define DIAG_TIMEOUT           50 * HZ
+
 struct dasd_discipline dasd_diag_discipline;
 
 struct dasd_diag_private {
        struct dasd_diag_characteristics rdc_data;
        struct dasd_diag_rw_io iob;
        struct dasd_diag_init_io iib;
-       unsigned int pt_block;
+       blocknum_t pt_block;
 };
 
 struct dasd_diag_req {
-       int block_count;
+       unsigned int block_count;
        struct dasd_diag_bio bio[0];
 };
 
+static const u8 DASD_DIAG_CMS1[] = { 0xc3, 0xd4, 0xe2, 0xf1 };/* EBCDIC CMS1 */
+
+/* Perform DIAG250 call with block I/O parameter list iob (input and output)
+ * and function code cmd.
+ * In case of an exception return 3. Otherwise return result of bitwise OR of
+ * resulting condition code and DIAG return code. */
 static __inline__ int
 dia250(void *iob, int cmd)
 {
+       typedef struct {
+               char _[max(sizeof (struct dasd_diag_init_io),
+                          sizeof (struct dasd_diag_rw_io))];
+       } addr_type;
        int rc;
 
-       __asm__ __volatile__("    lhi   %0,3\n"
-                            "    lr    0,%2\n"
-                            "    diag  0,%1,0x250\n"
-                            "0:  ipm   %0\n"
-                            "    srl   %0,28\n"
-                            "    or    %0,1\n"
-                            "1:\n"
-#ifndef CONFIG_ARCH_S390X
-                            ".section __ex_table,\"a\"\n"
-                            "    .align 4\n"
-                            "    .long 0b,1b\n"
-                            ".previous\n"
+       __asm__ __volatile__(
+#ifdef CONFIG_ARCH_S390X
+               "       lghi    %0,3\n"
+               "       lgr     0,%3\n"
+               "       diag    0,%2,0x250\n"
+               "0:     ipm     %0\n"
+               "       srl     %0,28\n"
+               "       or      %0,1\n"
+               "1:\n"
+               ".section __ex_table,\"a\"\n"
+               "       .align 8\n"
+               "       .quad  0b,1b\n"
+               ".previous\n"
 #else
-                            ".section __ex_table,\"a\"\n"
-                            "    .align 8\n"
-                            "    .quad  0b,1b\n"
-                            ".previous\n"
+               "       lhi     %0,3\n"
+               "       lr      0,%3\n"
+               "       diag    0,%2,0x250\n"
+               "0:     ipm     %0\n"
+               "       srl     %0,28\n"
+               "       or      %0,1\n"
+               "1:\n"
+               ".section __ex_table,\"a\"\n"
+               "       .align 4\n"
+               "       .long 0b,1b\n"
+               ".previous\n"
 #endif
-                            : "=&d" (rc)
-                            : "d" (cmd), "d" ((void *) __pa(iob))
-                            : "0", "1", "cc");
+               : "=&d" (rc), "=m" (*(addr_type *) iob)
+               : "d" (cmd), "d" (iob), "m" (*(addr_type *) iob)
+               : "0", "1", "cc");
        return rc;
 }
 
+/* Initialize block I/O to DIAG device using the specified blocksize and
+ * block offset. On success, return zero and set end_block to contain the
+ * number of blocks on the device minus the specified offset. Return non-zero
+ * otherwise. */
 static __inline__ int
-mdsk_init_io(struct dasd_device * device, int blocksize, int offset, int size)
+mdsk_init_io(struct dasd_device *device, unsigned int blocksize,
+            blocknum_t offset, blocknum_t *end_block)
 {
        struct dasd_diag_private *private;
        struct dasd_diag_init_io *iib;
@@ -92,14 +124,18 @@ mdsk_init_io(struct dasd_device * device, int blocksize, int offset, int size)
        iib->dev_nr = _ccw_device_get_device_number(device->cdev);
        iib->block_size = blocksize;
        iib->offset = offset;
-       iib->start_block = 0;
-       iib->end_block = size;
+       iib->flaga = DASD_DIAG_FLAGA_DEFAULT;
 
        rc = dia250(iib, INIT_BIO);
 
-       return rc & 3;
+       if ((rc & 3) == 0 && end_block)
+               *end_block = iib->end_block;
+
+       return rc;
 }
 
+/* Remove block I/O environment for device. Return zero on success, non-zero
+ * otherwise. */
 static __inline__ int
 mdsk_term_io(struct dasd_device * device)
 {
@@ -112,9 +148,25 @@ mdsk_term_io(struct dasd_device * device)
        memset(iib, 0, sizeof (struct dasd_diag_init_io));
        iib->dev_nr = _ccw_device_get_device_number(device->cdev);
        rc = dia250(iib, TERM_BIO);
-       return rc & 3;
+       return rc;
+}
+
+/* Error recovery for failed DIAG requests - try to reestablish the DIAG
+ * environment. */
+static void
+dasd_diag_erp(struct dasd_device *device)
+{
+       int rc;
+
+       mdsk_term_io(device);
+       rc = mdsk_init_io(device, device->bp_block, 0, NULL);
+       if (rc)
+               DEV_MESSAGE(KERN_WARNING, device, "DIAG ERP unsuccessful, "
+                           "rc=%d", rc);
 }
 
+/* Start a given request at the device. Return zero on success, non-zero
+ * otherwise. */
 static int
 dasd_start_diag(struct dasd_ccw_req * cqr)
 {
@@ -124,32 +176,66 @@ dasd_start_diag(struct dasd_ccw_req * cqr)
        int rc;
 
        device = cqr->device;
+       if (cqr->retries < 0) {
+               DEV_MESSAGE(KERN_WARNING, device, "DIAG start_IO: request %p "
+                           "- no retry left)", cqr);
+               cqr->status = DASD_CQR_FAILED;
+               return -EIO;
+       }
        private = (struct dasd_diag_private *) device->private;
        dreq = (struct dasd_diag_req *) cqr->data;
 
        private->iob.dev_nr = _ccw_device_get_device_number(device->cdev);
        private->iob.key = 0;
-       private->iob.flags = 2; /* do asynchronous io */
+       private->iob.flags = DASD_DIAG_RWFLAG_ASYNC;
        private->iob.block_count = dreq->block_count;
-       private->iob.interrupt_params = (u32)(addr_t) cqr;
+       private->iob.interrupt_params = (addr_t) cqr;
        private->iob.bio_list = __pa(dreq->bio);
+       private->iob.flaga = DASD_DIAG_FLAGA_DEFAULT;
 
        cqr->startclk = get_clock();
+       cqr->starttime = jiffies;
+       cqr->retries--;
 
        rc = dia250(&private->iob, RW_BIO);
-       if (rc > 8) {
-               DEV_MESSAGE(KERN_WARNING, device, "dia250 returned CC %d", rc);
-               cqr->status = DASD_CQR_ERROR;
-       } else if (rc == 0) {
+       switch (rc) {
+       case 0: /* Synchronous I/O finished successfully */
+               cqr->stopclk = get_clock();
                cqr->status = DASD_CQR_DONE;
-               dasd_schedule_bh(device);
-       } else {
+               /* Indicate to calling function that only a dasd_schedule_bh()
+                  and no timer is needed */
+                rc = -EACCES;
+               break;
+       case 8: /* Asynchronous I/O was started */
                cqr->status = DASD_CQR_IN_IO;
                rc = 0;
+               break;
+       default: /* Error condition */
+               cqr->status = DASD_CQR_QUEUED;
+               DEV_MESSAGE(KERN_WARNING, device, "dia250 returned rc=%d", rc);
+               dasd_diag_erp(device);
+               rc = -EIO;
+               break;
        }
        return rc;
 }
 
+/* Terminate given request at the device. */
+static int
+dasd_diag_term_IO(struct dasd_ccw_req * cqr)
+{
+       struct dasd_device *device;
+
+       device = cqr->device;
+       mdsk_term_io(device);
+       mdsk_init_io(device, device->bp_block, 0, NULL);
+       cqr->status = DASD_CQR_CLEAR;
+       cqr->stopclk = get_clock();
+       dasd_schedule_bh(device);
+       return 0;
+}
+
+/* Handle external interruption. */
 static void
 dasd_ext_handler(struct pt_regs *regs, __u16 code)
 {
@@ -157,25 +243,27 @@ dasd_ext_handler(struct pt_regs *regs, __u16 code)
        struct dasd_device *device;
        unsigned long long expires;
        unsigned long flags;
-       char status;
-       int ip;
-
-       /*
-        * Get the external interruption subcode. VM stores
-        * this in the 'cpu address' field associated with
-        * the external interrupt. For diag 250 the subcode
-        * needs to be 3.
-        */
-       if ((S390_lowcore.cpu_addr & 0xff00) != 0x0300)
-               return;
-       status = *((char *) &S390_lowcore.ext_params + 5);
-       ip = S390_lowcore.ext_params;
+       u8 int_code, status;
+       addr_t ip;
+       int rc;
 
+       int_code = *((u8 *) DASD_DIAG_LC_INT_CODE);
+       status = *((u8 *) DASD_DIAG_LC_INT_STATUS);
+       switch (int_code) {
+       case DASD_DIAG_CODE_31BIT:
+               ip = (addr_t) *((u32 *) DASD_DIAG_LC_INT_PARM_31BIT);
+               break;
+       case DASD_DIAG_CODE_64BIT:
+               ip = (addr_t) *((u64 *) DASD_DIAG_LC_INT_PARM_64BIT);
+               break;
+       default:
+               return;
+       }
        if (!ip) {              /* no intparm: unsolicited interrupt */
                MESSAGE(KERN_DEBUG, "%s", "caught unsolicited interrupt");
                return;
        }
-       cqr = (struct dasd_ccw_req *)(addr_t) ip;
+       cqr = (struct dasd_ccw_req *) ip;
        device = (struct dasd_device *) cqr->device;
        if (strncmp(device->discipline->ebcname, (char *) &cqr->magic, 4)) {
                DEV_MESSAGE(KERN_WARNING, device,
@@ -188,6 +276,15 @@ dasd_ext_handler(struct pt_regs *regs, __u16 code)
        /* get irq lock to modify request queue */
        spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
 
+       /* Check for a pending clear operation */
+       if (cqr->status == DASD_CQR_CLEAR) {
+               cqr->status = DASD_CQR_QUEUED;
+               dasd_clear_timer(device);
+               dasd_schedule_bh(device);
+               spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
+               return;
+       }
+
        cqr->stopclk = get_clock();
 
        expires = 0;
@@ -198,16 +295,22 @@ dasd_ext_handler(struct pt_regs *regs, __u16 code)
                        next = list_entry(device->ccw_queue.next,
                                          struct dasd_ccw_req, list);
                        if (next->status == DASD_CQR_QUEUED) {
-                               if (dasd_start_diag(next) == 0)
+                               rc = dasd_start_diag(next);
+                               if (rc == 0)
                                        expires = next->expires;
-                               else
+                               else if (rc != -EACCES)
                                        DEV_MESSAGE(KERN_WARNING, device, "%s",
                                                    "Interrupt fastpath "
                                                    "failed!");
                        }
                }
-       } else 
-               cqr->status = DASD_CQR_FAILED;
+       } else {
+               cqr->status = DASD_CQR_QUEUED;
+               DEV_MESSAGE(KERN_WARNING, device, "interrupt status for "
+                           "request %p was %d (%d retries left)", cqr, status,
+                           cqr->retries);
+               dasd_diag_erp(device);
+       }
 
        if (expires != 0)
                dasd_set_timer(device, expires);
@@ -218,14 +321,17 @@ dasd_ext_handler(struct pt_regs *regs, __u16 code)
        spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
 }
 
+/* Check whether device can be controlled by DIAG discipline. Return zero on
+ * success, non-zero otherwise. */
 static int
 dasd_diag_check_device(struct dasd_device *device)
 {
        struct dasd_diag_private *private;
        struct dasd_diag_characteristics *rdc_data;
        struct dasd_diag_bio bio;
-       long *label;
-       int sb, bsize;
+       struct dasd_diag_cms_label *label;
+       blocknum_t end_block;
+       unsigned int sb, bsize;
        int rc;
 
        private = (struct dasd_diag_private *) device->private;
@@ -244,8 +350,11 @@ dasd_diag_check_device(struct dasd_device *device)
        rdc_data->rdc_len = sizeof (struct dasd_diag_characteristics);
 
        rc = diag210((struct diag210 *) rdc_data);
-       if (rc)
+       if (rc) {
+               DEV_MESSAGE(KERN_WARNING, device, "failed to retrieve device "
+                           "information (rc=%d)", rc);
                return -ENOTSUPP;
+       }
 
        /* Figure out position of label block */
        switch (private->rdc_data.vdev_class) {
@@ -256,6 +365,8 @@ dasd_diag_check_device(struct dasd_device *device)
                private->pt_block = 2;
                break;
        default:
+               DEV_MESSAGE(KERN_WARNING, device, "unsupported device class "
+                           "(class=%d)", private->rdc_data.vdev_class);
                return -ENOTSUPP;
        }
 
@@ -269,15 +380,17 @@ dasd_diag_check_device(struct dasd_device *device)
        mdsk_term_io(device);
 
        /* figure out blocksize of device */
-       label = (long *) get_zeroed_page(GFP_KERNEL);
+       label = (struct dasd_diag_cms_label *) get_zeroed_page(GFP_KERNEL);
        if (label == NULL)  {
                DEV_MESSAGE(KERN_WARNING, device, "%s",
                            "No memory to allocate initialization request");
                return -ENOMEM;
        }
+       rc = 0;
+       end_block = 0;
        /* try all sizes - needed for ECKD devices */
        for (bsize = 512; bsize <= PAGE_SIZE; bsize <<= 1) {
-               mdsk_init_io(device, bsize, 0, 64);
+               mdsk_init_io(device, bsize, 0, &end_block);
                memset(&bio, 0, sizeof (struct dasd_diag_bio));
                bio.type = MDSK_READ_REQ;
                bio.block_number = private->pt_block + 1;
@@ -289,37 +402,45 @@ dasd_diag_check_device(struct dasd_device *device)
                private->iob.block_count = 1;
                private->iob.interrupt_params = 0;
                private->iob.bio_list = __pa(&bio);
-               if (dia250(&private->iob, RW_BIO) == 0)
+               private->iob.flaga = DASD_DIAG_FLAGA_DEFAULT;
+               rc = dia250(&private->iob, RW_BIO);
+               if (rc == 0 || rc == 3)
                        break;
                mdsk_term_io(device);
        }
-       if (bsize <= PAGE_SIZE && label[0] == 0xc3d4e2f1) {
-               /* get formatted blocksize from label block */
-               bsize = (int) label[3];
-               device->blocks = label[7];
+       if (rc == 3) {
+               DEV_MESSAGE(KERN_WARNING, device, "%s", "DIAG call failed");
+               rc = -EOPNOTSUPP;
+       } else if (rc != 0) {
+               DEV_MESSAGE(KERN_WARNING, device, "device access failed "
+                           "(rc=%d)", rc);
+               rc = -EIO;
+       } else {
+               if (memcmp(label->label_id, DASD_DIAG_CMS1,
+                         sizeof(DASD_DIAG_CMS1)) == 0) {
+                       /* get formatted blocksize from label block */
+                       bsize = (unsigned int) label->block_size;
+                       device->blocks = (unsigned long) label->block_count;
+               } else
+                       device->blocks = end_block;
                device->bp_block = bsize;
                device->s2b_shift = 0;  /* bits to shift 512 to get a block */
                for (sb = 512; sb < bsize; sb = sb << 1)
                        device->s2b_shift++;
                
                DEV_MESSAGE(KERN_INFO, device,
-                           "capacity (%dkB blks): %ldkB",
-                           (device->bp_block >> 10),
-                           (device->blocks << device->s2b_shift) >> 1);
+                           "(%ld B/blk): %ldkB",
+                           (unsigned long) device->bp_block,
+                           (unsigned long) (device->blocks <<
+                               device->s2b_shift) >> 1);
                rc = 0;
-       } else {
-               if (bsize > PAGE_SIZE)
-                       DEV_MESSAGE(KERN_WARNING, device, "%s",
-                                   "DIAG access failed");
-               else
-                       DEV_MESSAGE(KERN_WARNING, device, "%s",
-                                   "volume is not CMS formatted");
-               rc = -EMEDIUMTYPE;
        }
        free_page((long) label);
        return rc;
 }
 
+/* Fill in virtual disk geometry for device. Return zero on success, non-zero
+ * otherwise. */
 static int
 dasd_diag_fill_geometry(struct dasd_device *device, struct hd_geometry *geo)
 {
@@ -349,6 +470,8 @@ dasd_diag_erp_postaction(struct dasd_ccw_req * cqr)
        return dasd_default_erp_postaction;
 }
 
+/* Create DASD request from block device request. Return pointer to new
+ * request on success, ERR_PTR otherwise. */
 static struct dasd_ccw_req *
 dasd_diag_build_cp(struct dasd_device * device, struct request *req)
 {
@@ -358,9 +481,9 @@ dasd_diag_build_cp(struct dasd_device * device, struct request *req)
        struct bio *bio;
        struct bio_vec *bv;
        char *dst;
-       int count, datasize;
+       unsigned int count, datasize;
        sector_t recid, first_rec, last_rec;
-       unsigned blksize, off;
+       unsigned int blksize, off;
        unsigned char rw_cmd;
        int i;
 
@@ -413,13 +536,16 @@ dasd_diag_build_cp(struct dasd_device * device, struct request *req)
                        }
                }
        }
+       cqr->retries = DIAG_MAX_RETRIES;
        cqr->buildclk = get_clock();
        cqr->device = device;
-       cqr->expires = 50 * HZ; /* 50 seconds */
+       cqr->expires = DIAG_TIMEOUT;
        cqr->status = DASD_CQR_FILLED;
        return cqr;
 }
 
+/* Release DASD request. Return non-zero if request was successful, zero
+ * otherwise. */
 static int
 dasd_diag_free_cp(struct dasd_ccw_req *cqr, struct request *req)
 {
@@ -430,6 +556,7 @@ dasd_diag_free_cp(struct dasd_ccw_req *cqr, struct request *req)
        return status;
 }
 
+/* Fill in IOCTL data for device. */
 static int
 dasd_diag_fill_info(struct dasd_device * device,
                    struct dasd_information2_t * info)
@@ -437,7 +564,7 @@ dasd_diag_fill_info(struct dasd_device * device,
        struct dasd_diag_private *private;
 
        private = (struct dasd_diag_private *) device->private;
-       info->label_block = private->pt_block;
+       info->label_block = (unsigned int) private->pt_block;
        info->FBA_layout = 1;
        info->format = DASD_FORMAT_LDL;
        info->characteristics_size = sizeof (struct dasd_diag_characteristics);
@@ -456,26 +583,15 @@ dasd_diag_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req,
                    "dump sense not available for DIAG data");
 }
 
-/*
- * max_blocks is dependent on the amount of storage that is available
- * in the static io buffer for each device. Currently each device has
- * 8192 bytes (=2 pages). dasd diag is only relevant for 31 bit.
- * The struct dasd_ccw_req has 96 bytes, the struct dasd_diag_req has
- * 8 bytes and the struct dasd_diag_bio for each block has 16 bytes. 
- * That makes:
- * (8192 - 96 - 8) / 16 = 505.5 blocks at maximum.
- * We want to fit two into the available memory so that we can immediately
- * start the next request if one finishes off. That makes 252.75 blocks
- * for one request. Give a little safety and the result is 240.
- */
 struct dasd_discipline dasd_diag_discipline = {
        .owner = THIS_MODULE,
        .name = "DIAG",
        .ebcname = "DIAG",
-       .max_blocks = 240,
+       .max_blocks = DIAG_MAX_BLOCKS,
        .check_device = dasd_diag_check_device,
        .fill_geometry = dasd_diag_fill_geometry,
        .start_IO = dasd_start_diag,
+       .term_IO = dasd_diag_term_IO,
        .examine_error = dasd_diag_examine_error,
        .erp_action = dasd_diag_erp_action,
        .erp_postaction = dasd_diag_erp_postaction,
@@ -493,7 +609,7 @@ dasd_diag_init(void)
                            "Machine is not VM: %s "
                            "discipline not initializing",
                            dasd_diag_discipline.name);
-               return -EINVAL;
+               return -ENODEV;
        }
        ASCEBC(dasd_diag_discipline.ebcname, 4);
 
@@ -506,13 +622,6 @@ dasd_diag_init(void)
 static void __exit
 dasd_diag_cleanup(void)
 {
-       if (!MACHINE_IS_VM) {
-               MESSAGE_LOG(KERN_INFO,
-                           "Machine is not VM: %s "
-                           "discipline not cleaned",
-                           dasd_diag_discipline.name);
-               return;
-       }
        unregister_external_interrupt(0x2603, dasd_ext_handler);
        ctl_clear_bit(0, 9);
        dasd_diag_discipline_pointer = NULL;
@@ -520,22 +629,3 @@ dasd_diag_cleanup(void)
 
 module_init(dasd_diag_init);
 module_exit(dasd_diag_cleanup);
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-indent-level: 4 
- * c-brace-imaginary-offset: 0
- * c-brace-offset: -4
- * c-argdecl-indent: 4
- * c-label-offset: -4
- * c-continued-statement-offset: 4
- * c-continued-brace-offset: 0
- * indent-tabs-mode: 1
- * tab-width: 8
- * End:
- */
index a0c38e3039798527cc5ffbf13065af9a2c555b67..b26eb28df4bf093e4b6816275ba46d91d4236896 100644 (file)
@@ -6,7 +6,7 @@
  * Bugreports.to..: <Linux390@de.ibm.com>
  * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
  *
- * $Revision: 1.6 $
+ * $Revision: 1.7 $
  */
 
 #define MDSK_WRITE_REQ 0x01
 #define DEV_CLASS_FBA  0x01
 #define DEV_CLASS_ECKD 0x04
 
+#define DASD_DIAG_LC_INT_CODE          132
+#define DASD_DIAG_LC_INT_STATUS                133
+#define DASD_DIAG_LC_INT_PARM_31BIT    128
+#define DASD_DIAG_LC_INT_PARM_64BIT    4536
+#define DASD_DIAG_CODE_31BIT           0x03
+#define DASD_DIAG_CODE_64BIT           0x07
+
+#define DASD_DIAG_RWFLAG_ASYNC         0x02
+#define DASD_DIAG_RWFLAG_NOCACHE       0x01
+
+#define DASD_DIAG_FLAGA_FORMAT_64BIT   0x80
+
 struct dasd_diag_characteristics {
        u16 dev_nr;
        u16 rdc_len;
@@ -32,35 +44,106 @@ struct dasd_diag_characteristics {
        u8 rdev_features;
 } __attribute__ ((packed, aligned(4)));
 
+struct dasd_diag_cms_label {
+       u8 label_id[4];
+       u8 vol_id[6];
+       u16 version_id;
+       u32 block_size;
+       u32 origin_ptr;
+       u32 usable_count;
+       u32 formatted_count;
+       u32 block_count;
+       u32 used_count;
+       u32 fst_size;
+       u32 fst_count;
+       u8 format_date[6];
+       u8 reserved1[2];
+       u32 disk_offset;
+       u32 map_block;
+       u32 hblk_disp;
+       u32 user_disp;
+       u8 reserved2[4];
+       u8 segment_name[8];
+} __attribute__ ((packed));
+
+#ifdef CONFIG_ARCH_S390X
+#define DASD_DIAG_FLAGA_DEFAULT                DASD_DIAG_FLAGA_FORMAT_64BIT
+
+typedef u64 blocknum_t;
+typedef s64 sblocknum_t;
+
+struct dasd_diag_bio {
+       u8 type;
+       u8 status;
+       u8 spare1[2];
+       u32 alet;
+       blocknum_t block_number;
+       u64 buffer;
+} __attribute__ ((packed, aligned(8)));
+
+struct dasd_diag_init_io {
+       u16 dev_nr;
+       u8 flaga;
+       u8 spare1[21];
+       u32 block_size;
+       u8 spare2[4];
+       blocknum_t offset;
+       sblocknum_t start_block;
+       blocknum_t end_block;
+       u8  spare3[8];
+} __attribute__ ((packed, aligned(8)));
+
+struct dasd_diag_rw_io {
+       u16 dev_nr;
+       u8  flaga;
+       u8  spare1[21];
+       u8  key;
+       u8  flags;
+       u8  spare2[2];
+       u32 block_count;
+       u32 alet;
+       u8  spare3[4];
+       u64 interrupt_params;
+       u64 bio_list;
+       u8  spare4[8];
+} __attribute__ ((packed, aligned(8)));
+#else /* CONFIG_ARCH_S390X */
+#define DASD_DIAG_FLAGA_DEFAULT                0x0
+
+typedef u32 blocknum_t;
+typedef s32 sblocknum_t;
+
 struct dasd_diag_bio {
        u8 type;
        u8 status;
        u16 spare1;
-       u32 block_number;
+       blocknum_t block_number;
        u32 alet;
        u32 buffer;
 } __attribute__ ((packed, aligned(8)));
 
 struct dasd_diag_init_io {
        u16 dev_nr;
-       u16 spare1[11];
+       u8 flaga;
+       u8 spare1[21];
        u32 block_size;
-       u32 offset;
-       u32 start_block;
-       u32 end_block;
-       u32 spare2[6];
+       blocknum_t offset;
+       sblocknum_t start_block;
+       blocknum_t end_block;
+       u8 spare2[24];
 } __attribute__ ((packed, aligned(8)));
 
 struct dasd_diag_rw_io {
        u16 dev_nr;
-       u16 spare1[11];
+       u8 flaga;
+       u8 spare1[21];
        u8 key;
        u8 flags;
-       u16 spare2;
+       u8 spare2[2];
        u32 block_count;
        u32 alet;
        u32 bio_list;
        u32 interrupt_params;
-       u32 spare3[5];
+       u8 spare3[20];
 } __attribute__ ((packed, aligned(8)));
-
+#endif /* CONFIG_ARCH_S390X */