1 files changed, 175 insertions, 107 deletions

diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c
index b32d7eb3d81a..33bff8fec7d1 100644
--- a/drivers/s390/cio/cio.c
+++ b/drivers/s390/cio/cio.c
@@ -2,7 +2,7 @@
  *  drivers/s390/cio/cio.c
  *   S/390 common I/O routines -- low level i/o calls
  *
- *    Copyright (C) IBM Corp. 1999,2006
+ *    Copyright IBM Corp. 1999,2008
  *    Author(s): Ingo Adlung (adlung@de.ibm.com)
  *               Cornelia Huck (cornelia.huck@de.ibm.com)
  *               Arnd Bergmann (arndb@de.ibm.com)
@@ -24,7 +24,9 @@
 #include <asm/ipl.h>
 #include <asm/chpid.h>
 #include <asm/airq.h>
+#include <asm/isc.h>
 #include <asm/cpu.h>
+#include <asm/fcx.h>
 #include "cio.h"
 #include "css.h"
 #include "chsc.h"
@@ -72,7 +74,6 @@ out_unregister:
                 debug_unregister(cio_debug_trace_id);
         if (cio_debug_crw_id)
                 debug_unregister(cio_debug_crw_id);
-        printk(KERN_WARNING"cio: could not initialize debugging\n");
         return -1;
 }
 
@@ -128,7 +129,7 @@ cio_tpi(void)
         local_bh_disable();
         irq_enter ();
         spin_lock(sch->lock);
-        memcpy (&sch->schib.scsw, &irb->scsw, sizeof (struct scsw));
+        memcpy(&sch->schib.scsw, &irb->scsw, sizeof(union scsw));
         if (sch->driver && sch->driver->irq)
                 sch->driver->irq(sch);
         spin_unlock(sch->lock);
@@ -167,30 +168,30 @@ cio_start_key (struct subchannel *sch,	/* subchannel structure */
 {
         char dbf_txt[15];
         int ccode;
-        struct orb *orb;
+        union orb *orb;
 
         CIO_TRACE_EVENT(4, "stIO");
         CIO_TRACE_EVENT(4, sch->dev.bus_id);
 
         orb = &to_io_private(sch)->orb;
         /* sch is always under 2G. */
-        orb->intparm = (u32)(addr_t)sch;
-        orb->fmt = 1;
+        orb->cmd.intparm = (u32)(addr_t)sch;
+        orb->cmd.fmt = 1;
 
-        orb->pfch = sch->options.prefetch == 0;
-        orb->spnd = sch->options.suspend;
-        orb->ssic = sch->options.suspend && sch->options.inter;
-        orb->lpm = (lpm != 0) ? lpm : sch->lpm;
+        orb->cmd.pfch = sch->options.prefetch == 0;
+        orb->cmd.spnd = sch->options.suspend;
+        orb->cmd.ssic = sch->options.suspend && sch->options.inter;
+        orb->cmd.lpm = (lpm != 0) ? lpm : sch->lpm;
 #ifdef CONFIG_64BIT
         /*
          * for 64 bit we always support 64 bit IDAWs with 4k page size only
          */
-        orb->c64 = 1;
-        orb->i2k = 0;
+        orb->cmd.c64 = 1;
+        orb->cmd.i2k = 0;
 #endif
-        orb->key = key >> 4;
+        orb->cmd.key = key >> 4;
         /* issue "Start Subchannel" */
-        orb->cpa = (__u32) __pa(cpa);
+        orb->cmd.cpa = (__u32) __pa(cpa);
         ccode = ssch(sch->schid, orb);
 
         /* process condition code */
@@ -202,7 +203,7 @@ cio_start_key (struct subchannel *sch,	/* subchannel structure */
                 /*
                  * initialize device status information
                  */
-                sch->schib.scsw.actl |= SCSW_ACTL_START_PEND;
+                sch->schib.scsw.cmd.actl |= SCSW_ACTL_START_PEND;
                 return 0;
         case 1:         /* status pending */
         case 2:         /* busy */
@@ -237,7 +238,7 @@ cio_resume (struct subchannel *sch)
 
         switch (ccode) {
         case 0:
-                sch->schib.scsw.actl |= SCSW_ACTL_RESUME_PEND;
+                sch->schib.scsw.cmd.actl |= SCSW_ACTL_RESUME_PEND;
                 return 0;
         case 1:
                 return -EBUSY;
@@ -277,7 +278,7 @@ cio_halt(struct subchannel *sch)
 
         switch (ccode) {
         case 0:
-                sch->schib.scsw.actl |= SCSW_ACTL_HALT_PEND;
+                sch->schib.scsw.cmd.actl |= SCSW_ACTL_HALT_PEND;
                 return 0;
         case 1:         /* status pending */
         case 2:         /* busy */
@@ -312,7 +313,7 @@ cio_clear(struct subchannel *sch)
 
         switch (ccode) {
         case 0:
-                sch->schib.scsw.actl |= SCSW_ACTL_CLEAR_PEND;
+                sch->schib.scsw.cmd.actl |= SCSW_ACTL_CLEAR_PEND;
                 return 0;
         default:                /* device not operational */
                 return -ENODEV;
@@ -387,8 +388,10 @@ cio_modify (struct subchannel *sch)
         return ret;
 }
 
-/*
- * Enable subchannel.
+/**
+ * cio_enable_subchannel - enable a subchannel.
+ * @sch: subchannel to be enabled
+ * @intparm: interruption parameter to set
  */
 int cio_enable_subchannel(struct subchannel *sch, u32 intparm)
 {
@@ -434,12 +437,13 @@ int cio_enable_subchannel(struct subchannel *sch, u32 intparm)
         CIO_TRACE_EVENT (2, dbf_txt);
         return ret;
 }
+EXPORT_SYMBOL_GPL(cio_enable_subchannel);
 
-/*
- * Disable subchannel.
+/**
+ * cio_disable_subchannel - disable a subchannel.
+ * @sch: subchannel to disable
  */
-int
-cio_disable_subchannel (struct subchannel *sch)
+int cio_disable_subchannel(struct subchannel *sch)
 {
         char dbf_txt[15];
         int ccode;
@@ -455,7 +459,7 @@ cio_disable_subchannel (struct subchannel *sch)
         if (ccode == 3)         /* Not operational. */
                 return -ENODEV;
 
-        if (sch->schib.scsw.actl != 0)
+        if (scsw_actl(&sch->schib.scsw) != 0)
                 /*
                  * the disable function must not be called while there are
                  *  requests pending for completion !
@@ -484,6 +488,7 @@ cio_disable_subchannel (struct subchannel *sch)
         CIO_TRACE_EVENT (2, dbf_txt);
         return ret;
 }
+EXPORT_SYMBOL_GPL(cio_disable_subchannel);
 
 int cio_create_sch_lock(struct subchannel *sch)
 {
@@ -494,27 +499,61 @@ int cio_create_sch_lock(struct subchannel *sch)
         return 0;
 }
 
-/*
- * cio_validate_subchannel()
+static int cio_check_devno_blacklisted(struct subchannel *sch)
+{
+        if (is_blacklisted(sch->schid.ssid, sch->schib.pmcw.dev)) {
+                /*
+                 * This device must not be known to Linux. So we simply
+                 * say that there is no device and return ENODEV.
+                 */
+                CIO_MSG_EVENT(6, "Blacklisted device detected "
+                              "at devno %04X, subchannel set %x\n",
+                              sch->schib.pmcw.dev, sch->schid.ssid);
+                return -ENODEV;
+        }
+        return 0;
+}
+
+static int cio_validate_io_subchannel(struct subchannel *sch)
+{
+        /* Initialization for io subchannels. */
+        if (!css_sch_is_valid(&sch->schib))
+                return -ENODEV;
+
+        /* Devno is valid. */
+        return cio_check_devno_blacklisted(sch);
+}
+
+static int cio_validate_msg_subchannel(struct subchannel *sch)
+{
+        /* Initialization for message subchannels. */
+        if (!css_sch_is_valid(&sch->schib))
+                return -ENODEV;
+
+        /* Devno is valid. */
+        return cio_check_devno_blacklisted(sch);
+}
+
+/**
+ * cio_validate_subchannel - basic validation of subchannel
+ * @sch: subchannel structure to be filled out
+ * @schid: subchannel id
  *
  * Find out subchannel type and initialize struct subchannel.
  * Return codes:
- *   SUBCHANNEL_TYPE_IO for a normal io subchannel
- *   SUBCHANNEL_TYPE_CHSC for a chsc subchannel
- *   SUBCHANNEL_TYPE_MESSAGE for a messaging subchannel
- *   SUBCHANNEL_TYPE_ADM for a adm(?) subchannel
+ *   0 on success
  *   -ENXIO for non-defined subchannels
- *   -ENODEV for subchannels with invalid device number or blacklisted devices
+ *   -ENODEV for invalid subchannels or blacklisted devices
+ *   -EIO for subchannels in an invalid subchannel set
  */
-int
-cio_validate_subchannel (struct subchannel *sch, struct subchannel_id schid)
+int cio_validate_subchannel(struct subchannel *sch, struct subchannel_id schid)
 {
         char dbf_txt[15];
         int ccode;
         int err;
 
-        sprintf (dbf_txt, "valsch%x", schid.sch_no);
-        CIO_TRACE_EVENT (4, dbf_txt);
+        sprintf(dbf_txt, "valsch%x", schid.sch_no);
+        CIO_TRACE_EVENT(4, dbf_txt);
 
         /* Nuke all fields. */
         memset(sch, 0, sizeof(struct subchannel));
@@ -546,67 +585,21 @@ cio_validate_subchannel (struct subchannel *sch, struct subchannel_id schid)
         /* Copy subchannel type from path management control word. */
         sch->st = sch->schib.pmcw.st;
 
-        /*
-         * ... just being curious we check for non I/O subchannels
-         */
-        if (sch->st != 0) {
-                CIO_MSG_EVENT(4, "Subchannel 0.%x.%04x reports "
-                              "non-I/O subchannel type %04X\n",
-                              sch->schid.ssid, sch->schid.sch_no, sch->st);
-                /* We stop here for non-io subchannels. */
-                err = sch->st;
-                goto out;
-        }
-
-        /* Initialization for io subchannels. */
-        if (!css_sch_is_valid(&sch->schib)) {
-                err = -ENODEV;
-                goto out;
+        switch (sch->st) {
+        case SUBCHANNEL_TYPE_IO:
+                err = cio_validate_io_subchannel(sch);
+                break;
+        case SUBCHANNEL_TYPE_MSG:
+                err = cio_validate_msg_subchannel(sch);
+                break;
+        default:
+                err = 0;
         }
-
-        /* Devno is valid. */
-        if (is_blacklisted (sch->schid.ssid, sch->schib.pmcw.dev)) {
-                /*
-                 * This device must not be known to Linux. So we simply
-                 * say that there is no device and return ENODEV.
-                 */
-                CIO_MSG_EVENT(6, "Blacklisted device detected "
-                              "at devno %04X, subchannel set %x\n",
-                              sch->schib.pmcw.dev, sch->schid.ssid);
-                err = -ENODEV;
+        if (err)
                 goto out;
-        }
-        if (cio_is_console(sch->schid)) {
-                sch->opm = 0xff;
-                sch->isc = 1;
-        } else {
-                sch->opm = chp_get_sch_opm(sch);
-                sch->isc = 3;
-        }
-        sch->lpm = sch->schib.pmcw.pam & sch->opm;
-
-        CIO_MSG_EVENT(6, "Detected device %04x on subchannel 0.%x.%04X "
-                      "- PIM = %02X, PAM = %02X, POM = %02X\n",
-                      sch->schib.pmcw.dev, sch->schid.ssid,
-                      sch->schid.sch_no, sch->schib.pmcw.pim,
-                      sch->schib.pmcw.pam, sch->schib.pmcw.pom);
 
-        /*
-         * We now have to initially ...
-         *  ... enable "concurrent sense"
-         *  ... enable "multipath mode" if more than one
-         *        CHPID is available. This is done regardless
-         *        whether multiple paths are available for us.
-         */
-        sch->schib.pmcw.csense = 1;     /* concurrent sense */
-        sch->schib.pmcw.ena = 0;
-        if ((sch->lpm & (sch->lpm - 1)) != 0)
-                sch->schib.pmcw.mp = 1; /* multipath mode */
-        /* clean up possible residual cmf stuff */
-        sch->schib.pmcw.mme = 0;
-        sch->schib.pmcw.mbfc = 0;
-        sch->schib.pmcw.mbi = 0;
-        sch->schib.mba = 0;
+        CIO_MSG_EVENT(4, "Subchannel 0.%x.%04x reports subchannel type %04X\n",
+                      sch->schid.ssid, sch->schid.sch_no, sch->st);
         return 0;
 out:
         if (!cio_is_console(schid))
@@ -647,7 +640,7 @@ do_IRQ (struct pt_regs *regs)
                  */
                 if (tpi_info->adapter_IO == 1 &&
                     tpi_info->int_type == IO_INTERRUPT_TYPE) {
-                        do_adapter_IO();
+                        do_adapter_IO(tpi_info->isc);
                         continue;
                 }
                 sch = (struct subchannel *)(unsigned long)tpi_info->intparm;
@@ -706,9 +699,9 @@ void wait_cons_dev(void)
         if (!console_subchannel_in_use)
                 return;
 
-        /* disable all but isc 1 (console device) */
+        /* disable all but the console isc */
         __ctl_store (save_cr6, 6, 6);
-        cr6 = 0x40000000;
+        cr6 = 1UL << (31 - CONSOLE_ISC);
         __ctl_load (cr6, 6, 6);
 
         do {
@@ -716,7 +709,7 @@ void wait_cons_dev(void)
                 if (!cio_tpi())
                         cpu_relax();
                 spin_lock(console_subchannel.lock);
-        } while (console_subchannel.schib.scsw.actl != 0);
+        } while (console_subchannel.schib.scsw.cmd.actl != 0);
         /*
          * restore previous isc value
          */
@@ -761,7 +754,6 @@ cio_get_console_sch_no(void)
                 /* unlike in 2.4, we cannot autoprobe here, since
                  * the channel subsystem is not fully initialized.
                  * With some luck, the HWC console can take over */
-                printk(KERN_WARNING "cio: No ccw console found!\n");
                 return -1;
         }
         return console_irq;
@@ -778,6 +770,7 @@ cio_probe_console(void)
         sch_no = cio_get_console_sch_no();
         if (sch_no == -1) {
                 console_subchannel_in_use = 0;
+                printk(KERN_WARNING "cio: No ccw console found!\n");
                 return ERR_PTR(-ENODEV);
         }
         memset(&console_subchannel, 0, sizeof(struct subchannel));
@@ -790,15 +783,15 @@ cio_probe_console(void)
         }
 
         /*
-         * enable console I/O-interrupt subclass 1
+         * enable console I/O-interrupt subclass
          */
-        ctl_set_bit(6, 30);
-        console_subchannel.isc = 1;
-        console_subchannel.schib.pmcw.isc = 1;
+        isc_register(CONSOLE_ISC);
+        console_subchannel.schib.pmcw.isc = CONSOLE_ISC;
         console_subchannel.schib.pmcw.intparm =
                 (u32)(addr_t)&console_subchannel;
         ret = cio_modify(&console_subchannel);
         if (ret) {
+                isc_unregister(CONSOLE_ISC);
                 console_subchannel_in_use = 0;
                 return ERR_PTR(ret);
         }
@@ -810,7 +803,7 @@ cio_release_console(void)
 {
         console_subchannel.schib.pmcw.intparm = 0;
         cio_modify(&console_subchannel);
-        ctl_clear_bit(6, 24);
+        isc_unregister(CONSOLE_ISC);
         console_subchannel_in_use = 0;
 }
 
@@ -864,7 +857,7 @@ static void udelay_reset(unsigned long usecs)
 }
 
 static int
-__clear_subchannel_easy(struct subchannel_id schid)
+__clear_io_subchannel_easy(struct subchannel_id schid)
 {
         int retry;
 
@@ -883,6 +876,12 @@ __clear_subchannel_easy(struct subchannel_id schid)
         return -EBUSY;
 }
 
+static void __clear_chsc_subchannel_easy(void)
+{
+        /* It seems we can only wait for a bit here :/ */
+        udelay_reset(100);
+}
+
 static int pgm_check_occured;
 
 static void cio_reset_pgm_check_handler(void)
@@ -921,11 +920,22 @@ static int __shutdown_subchannel_easy(struct subchannel_id schid, void *data)
         case -ENODEV:
                 break;
         default: /* -EBUSY */
-                if (__clear_subchannel_easy(schid))
-                        break; /* give up... */
+                switch (schib.pmcw.st) {
+                case SUBCHANNEL_TYPE_IO:
+                        if (__clear_io_subchannel_easy(schid))
+                                goto out; /* give up... */
+                        break;
+                case SUBCHANNEL_TYPE_CHSC:
+                        __clear_chsc_subchannel_easy();
+                        break;
+                default:
+                        /* No default clear strategy */
+                        break;
+                }
                 stsch(schid, &schib);
                 __disable_subchannel_easy(schid, &schib);
         }
+out:
         return 0;
 }
 
@@ -1068,3 +1078,61 @@ int __init cio_get_iplinfo(struct cio_iplinfo *iplinfo)
         iplinfo->is_qdio = schib.pmcw.qf;
         return 0;
 }
+
+/**
+ * cio_tm_start_key - perform start function
+ * @sch: subchannel on which to perform the start function
+ * @tcw: transport-command word to be started
+ * @lpm: mask of paths to use
+ * @key: storage key to use for storage access
+ *
+ * Start the tcw on the given subchannel. Return zero on success, non-zero
+ * otherwise.
+ */
+int cio_tm_start_key(struct subchannel *sch, struct tcw *tcw, u8 lpm, u8 key)
+{
+        int cc;
+        union orb *orb = &to_io_private(sch)->orb;
+
+        memset(orb, 0, sizeof(union orb));
+        orb->tm.intparm = (u32) (addr_t) sch;
+        orb->tm.key = key >> 4;
+        orb->tm.b = 1;
+        orb->tm.lpm = lpm ? lpm : sch->lpm;
+        orb->tm.tcw = (u32) (addr_t) tcw;
+        cc = ssch(sch->schid, orb);
+        switch (cc) {
+        case 0:
+                return 0;
+        case 1:
+        case 2:
+                return -EBUSY;
+        default:
+                return cio_start_handle_notoper(sch, lpm);
+        }
+}
+
+/**
+ * cio_tm_intrg - perform interrogate function
+ * @sch - subchannel on which to perform the interrogate function
+ *
+ * If the specified subchannel is running in transport-mode, perform the
+ * interrogate function. Return zero on success, non-zero otherwie.
+ */
+int cio_tm_intrg(struct subchannel *sch)
+{
+        int cc;
+
+        if (!to_io_private(sch)->orb.tm.b)
+                return -EINVAL;
+        cc = xsch(sch->schid);
+        switch (cc) {
+        case 0:
+        case 2:
+                return 0;
+        case 1:
+                return -EBUSY;
+        default:
+                return -ENODEV;
+        }
+}