Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 607 insertions, 0 deletions

diff --git a/drivers/s390/block/dasd_fba.c b/drivers/s390/block/dasd_fba.c
new file mode 100644
index 000000000000..7963ae343eef
--- /dev/null
+++ b/drivers/s390/block/dasd_fba.c
@@ -0,0 +1,607 @@
+/* 
+ * File...........: linux/drivers/s390/block/dasd_fba.c
+ * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
+ * Bugreports.to..: <Linux390@de.ibm.com>
+ * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
+ *
+ * $Revision: 1.39 $
+ */
+
+#include <linux/config.h>
+#include <linux/stddef.h>
+#include <linux/kernel.h>
+#include <asm/debug.h>
+
+#include <linux/slab.h>
+#include <linux/hdreg.h>        /* HDIO_GETGEO                      */
+#include <linux/bio.h>
+#include <linux/module.h>
+#include <linux/init.h>
+
+#include <asm/idals.h>
+#include <asm/ebcdic.h>
+#include <asm/io.h>
+#include <asm/todclk.h>
+#include <asm/ccwdev.h>
+
+#include "dasd_int.h"
+#include "dasd_fba.h"
+
+#ifdef PRINTK_HEADER
+#undef PRINTK_HEADER
+#endif                          /* PRINTK_HEADER */
+#define PRINTK_HEADER "dasd(fba):"
+
+#define DASD_FBA_CCW_WRITE 0x41
+#define DASD_FBA_CCW_READ 0x42
+#define DASD_FBA_CCW_LOCATE 0x43
+#define DASD_FBA_CCW_DEFINE_EXTENT 0x63
+
+MODULE_LICENSE("GPL");
+
+static struct dasd_discipline dasd_fba_discipline;
+
+struct dasd_fba_private {
+        struct dasd_fba_characteristics rdc_data;
+};
+
+static struct ccw_device_id dasd_fba_ids[] = {
+        { CCW_DEVICE_DEVTYPE (0x6310, 0, 0x9336, 0), driver_info: 0x1},
+        { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3370, 0), driver_info: 0x2},
+        { /* end of list */ },
+};
+
+MODULE_DEVICE_TABLE(ccw, dasd_fba_ids);
+
+static struct ccw_driver dasd_fba_driver; /* see below */
+static int
+dasd_fba_probe(struct ccw_device *cdev)
+{
+        int ret;
+
+        ret = dasd_generic_probe (cdev, &dasd_fba_discipline);
+        if (ret)
+                return ret;
+        ccw_device_set_options(cdev, CCWDEV_DO_PATHGROUP);
+        return 0;
+}
+
+static int
+dasd_fba_set_online(struct ccw_device *cdev)
+{
+        return dasd_generic_set_online (cdev, &dasd_fba_discipline);
+}
+
+static struct ccw_driver dasd_fba_driver = {
+        .name        = "dasd-fba",
+        .owner       = THIS_MODULE,
+        .ids         = dasd_fba_ids,
+        .probe       = dasd_fba_probe,
+        .remove      = dasd_generic_remove,
+        .set_offline = dasd_generic_set_offline,
+        .set_online  = dasd_fba_set_online,
+        .notify      = dasd_generic_notify,
+};
+
+static inline void
+define_extent(struct ccw1 * ccw, struct DE_fba_data *data, int rw,
+              int blksize, int beg, int nr)
+{
+        ccw->cmd_code = DASD_FBA_CCW_DEFINE_EXTENT;
+        ccw->flags = 0;
+        ccw->count = 16;
+        ccw->cda = (__u32) __pa(data);
+        memset(data, 0, sizeof (struct DE_fba_data));
+        if (rw == WRITE)
+                (data->mask).perm = 0x0;
+        else if (rw == READ)
+                (data->mask).perm = 0x1;
+        else
+                data->mask.perm = 0x2;
+        data->blk_size = blksize;
+        data->ext_loc = beg;
+        data->ext_end = nr - 1;
+}
+
+static inline void
+locate_record(struct ccw1 * ccw, struct LO_fba_data *data, int rw,
+              int block_nr, int block_ct)
+{
+        ccw->cmd_code = DASD_FBA_CCW_LOCATE;
+        ccw->flags = 0;
+        ccw->count = 8;
+        ccw->cda = (__u32) __pa(data);
+        memset(data, 0, sizeof (struct LO_fba_data));
+        if (rw == WRITE)
+                data->operation.cmd = 0x5;
+        else if (rw == READ)
+                data->operation.cmd = 0x6;
+        else
+                data->operation.cmd = 0x8;
+        data->blk_nr = block_nr;
+        data->blk_ct = block_ct;
+}
+
+static int
+dasd_fba_check_characteristics(struct dasd_device *device)
+{
+        struct dasd_fba_private *private;
+        struct ccw_device *cdev = device->cdev; 
+        void *rdc_data;
+        int rc;
+
+        private = (struct dasd_fba_private *) device->private;
+        if (private == NULL) {
+                private = kmalloc(sizeof(struct dasd_fba_private), GFP_KERNEL);
+                if (private == NULL) {
+                        DEV_MESSAGE(KERN_WARNING, device, "%s",
+                                    "memory allocation failed for private "
+                                    "data");
+                        return -ENOMEM;
+                }
+                device->private = (void *) private;
+        }
+        /* Read Device Characteristics */
+        rdc_data = (void *) &(private->rdc_data);
+        rc = read_dev_chars(device->cdev, &rdc_data, 32);
+        if (rc) {
+                DEV_MESSAGE(KERN_WARNING, device,
+                            "Read device characteristics returned error %d",
+                            rc);
+                return rc;
+        }
+
+        DEV_MESSAGE(KERN_INFO, device,
+                    "%04X/%02X(CU:%04X/%02X) %dMB at(%d B/blk)",
+                    cdev->id.dev_type,
+                    cdev->id.dev_model,
+                    cdev->id.cu_type,
+                    cdev->id.cu_model,
+                    ((private->rdc_data.blk_bdsa *
+                      (private->rdc_data.blk_size >> 9)) >> 11),
+                    private->rdc_data.blk_size);
+        return 0;
+}
+
+static int
+dasd_fba_do_analysis(struct dasd_device *device)
+{
+        struct dasd_fba_private *private;
+        int sb, rc;
+
+        private = (struct dasd_fba_private *) device->private;
+        rc = dasd_check_blocksize(private->rdc_data.blk_size);
+        if (rc) {
+                DEV_MESSAGE(KERN_INFO, device, "unknown blocksize %d",
+                            private->rdc_data.blk_size);
+                return rc;
+        }
+        device->blocks = private->rdc_data.blk_bdsa;
+        device->bp_block = private->rdc_data.blk_size;
+        device->s2b_shift = 0;  /* bits to shift 512 to get a block */
+        for (sb = 512; sb < private->rdc_data.blk_size; sb = sb << 1)
+                device->s2b_shift++;
+        return 0;
+}
+
+static int
+dasd_fba_fill_geometry(struct dasd_device *device, struct hd_geometry *geo)
+{
+        if (dasd_check_blocksize(device->bp_block) != 0)
+                return -EINVAL;
+        geo->cylinders = (device->blocks << device->s2b_shift) >> 10;
+        geo->heads = 16;
+        geo->sectors = 128 >> device->s2b_shift;
+        return 0;
+}
+
+static dasd_era_t
+dasd_fba_examine_error(struct dasd_ccw_req * cqr, struct irb * irb)
+{
+        struct dasd_device *device;
+        struct ccw_device *cdev;
+
+        device = (struct dasd_device *) cqr->device;
+        if (irb->scsw.cstat == 0x00 &&
+            irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END))
+                return dasd_era_none;
+        
+        cdev = device->cdev;
+        switch (cdev->id.dev_type) {
+        case 0x3370:
+                return dasd_3370_erp_examine(cqr, irb);
+        case 0x9336:
+                return dasd_9336_erp_examine(cqr, irb);
+        default:
+                return dasd_era_recover;
+        }
+}
+
+static dasd_erp_fn_t
+dasd_fba_erp_action(struct dasd_ccw_req * cqr)
+{
+        return dasd_default_erp_action;
+}
+
+static dasd_erp_fn_t
+dasd_fba_erp_postaction(struct dasd_ccw_req * cqr)
+{
+        if (cqr->function == dasd_default_erp_action)
+                return dasd_default_erp_postaction;
+
+        DEV_MESSAGE(KERN_WARNING, cqr->device, "unknown ERP action %p",
+                    cqr->function);
+        return NULL;
+}
+
+static struct dasd_ccw_req *
+dasd_fba_build_cp(struct dasd_device * device, struct request *req)
+{
+        struct dasd_fba_private *private;
+        unsigned long *idaws;
+        struct LO_fba_data *LO_data;
+        struct dasd_ccw_req *cqr;
+        struct ccw1 *ccw;
+        struct bio *bio;
+        struct bio_vec *bv;
+        char *dst;
+        int count, cidaw, cplength, datasize;
+        sector_t recid, first_rec, last_rec;
+        unsigned int blksize, off;
+        unsigned char cmd;
+        int i;
+
+        private = (struct dasd_fba_private *) device->private;
+        if (rq_data_dir(req) == READ) {
+                cmd = DASD_FBA_CCW_READ;
+        } else if (rq_data_dir(req) == WRITE) {
+                cmd = DASD_FBA_CCW_WRITE;
+        } else
+                return ERR_PTR(-EINVAL);
+        blksize = device->bp_block;
+        /* Calculate record id of first and last block. */
+        first_rec = req->sector >> device->s2b_shift;
+        last_rec = (req->sector + req->nr_sectors - 1) >> device->s2b_shift;
+        /* Check struct bio and count the number of blocks for the request. */
+        count = 0;
+        cidaw = 0;
+        rq_for_each_bio(bio, req) {
+                bio_for_each_segment(bv, bio, i) {
+                        if (bv->bv_len & (blksize - 1))
+                                /* Fba can only do full blocks. */
+                                return ERR_PTR(-EINVAL);
+                        count += bv->bv_len >> (device->s2b_shift + 9);
+#if defined(CONFIG_ARCH_S390X)
+                        if (idal_is_needed (page_address(bv->bv_page),
+                                            bv->bv_len))
+                                cidaw += bv->bv_len / blksize;
+#endif
+                }
+        }
+        /* Paranoia. */
+        if (count != last_rec - first_rec + 1)
+                return ERR_PTR(-EINVAL);
+        /* 1x define extent + 1x locate record + number of blocks */
+        cplength = 2 + count;
+        /* 1x define extent + 1x locate record */
+        datasize = sizeof(struct DE_fba_data) + sizeof(struct LO_fba_data) +
+                cidaw * sizeof(unsigned long);
+        /*
+         * Find out number of additional locate record ccws if the device
+         * can't do data chaining.
+         */
+        if (private->rdc_data.mode.bits.data_chain == 0) {
+                cplength += count - 1;
+                datasize += (count - 1)*sizeof(struct LO_fba_data);
+        }
+        /* Allocate the ccw request. */
+        cqr = dasd_smalloc_request(dasd_fba_discipline.name,
+                                   cplength, datasize, device);
+        if (IS_ERR(cqr))
+                return cqr;
+        ccw = cqr->cpaddr;
+        /* First ccw is define extent. */
+        define_extent(ccw++, cqr->data, rq_data_dir(req),
+                      device->bp_block, req->sector, req->nr_sectors);
+        /* Build locate_record + read/write ccws. */
+        idaws = (unsigned long *) (cqr->data + sizeof(struct DE_fba_data));
+        LO_data = (struct LO_fba_data *) (idaws + cidaw);
+        /* Locate record for all blocks for smart devices. */
+        if (private->rdc_data.mode.bits.data_chain != 0) {
+                ccw[-1].flags |= CCW_FLAG_CC;
+                locate_record(ccw++, LO_data++, rq_data_dir(req), 0, count);
+        }
+        recid = first_rec;
+        rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) {
+                dst = page_address(bv->bv_page) + bv->bv_offset;
+                if (dasd_page_cache) {
+                        char *copy = kmem_cache_alloc(dasd_page_cache,
+                                                      SLAB_DMA | __GFP_NOWARN);
+                        if (copy && rq_data_dir(req) == WRITE)
+                                memcpy(copy + bv->bv_offset, dst, bv->bv_len);
+                        if (copy)
+                                dst = copy + bv->bv_offset;
+                }
+                for (off = 0; off < bv->bv_len; off += blksize) {
+                        /* Locate record for stupid devices. */
+                        if (private->rdc_data.mode.bits.data_chain == 0) {
+                                ccw[-1].flags |= CCW_FLAG_CC;
+                                locate_record(ccw, LO_data++,
+                                              rq_data_dir(req),
+                                              recid - first_rec, 1);
+                                ccw->flags = CCW_FLAG_CC;
+                                ccw++;
+                        } else {
+                                if (recid > first_rec)
+                                        ccw[-1].flags |= CCW_FLAG_DC;
+                                else
+                                        ccw[-1].flags |= CCW_FLAG_CC;
+                        }
+                        ccw->cmd_code = cmd;
+                        ccw->count = device->bp_block;
+                        if (idal_is_needed(dst, blksize)) {
+                                ccw->cda = (__u32)(addr_t) idaws;
+                                ccw->flags = CCW_FLAG_IDA;
+                                idaws = idal_create_words(idaws, dst, blksize);
+                        } else {
+                                ccw->cda = (__u32)(addr_t) dst;
+                                ccw->flags = 0;
+                        }
+                        ccw++;
+                        dst += blksize;
+                        recid++;
+                }
+        }
+        cqr->device = device;
+        cqr->expires = 5 * 60 * HZ;     /* 5 minutes */
+        cqr->status = DASD_CQR_FILLED;
+        return cqr;
+}
+
+static int
+dasd_fba_free_cp(struct dasd_ccw_req *cqr, struct request *req)
+{
+        struct dasd_fba_private *private;
+        struct ccw1 *ccw;
+        struct bio *bio;
+        struct bio_vec *bv;
+        char *dst, *cda;
+        unsigned int blksize, off;
+        int i, status;
+
+        if (!dasd_page_cache)
+                goto out;
+        private = (struct dasd_fba_private *) cqr->device->private;
+        blksize = cqr->device->bp_block;
+        ccw = cqr->cpaddr;
+        /* Skip over define extent & locate record. */
+        ccw++;
+        if (private->rdc_data.mode.bits.data_chain != 0)
+                ccw++;
+        rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) {
+                dst = page_address(bv->bv_page) + bv->bv_offset;
+                for (off = 0; off < bv->bv_len; off += blksize) {
+                        /* Skip locate record. */
+                        if (private->rdc_data.mode.bits.data_chain == 0)
+                                ccw++;
+                        if (dst) {
+                                if (ccw->flags & CCW_FLAG_IDA)
+                                        cda = *((char **)((addr_t) ccw->cda));
+                                else
+                                        cda = (char *)((addr_t) ccw->cda);
+                                if (dst != cda) {
+                                        if (rq_data_dir(req) == READ)
+                                                memcpy(dst, cda, bv->bv_len);
+                                        kmem_cache_free(dasd_page_cache,
+                                            (void *)((addr_t)cda & PAGE_MASK));
+                                }
+                                dst = NULL;
+                        }
+                        ccw++;
+                }
+        }
+out:
+        status = cqr->status == DASD_CQR_DONE;
+        dasd_sfree_request(cqr, cqr->device);
+        return status;
+}
+
+static int
+dasd_fba_fill_info(struct dasd_device * device,
+                   struct dasd_information2_t * info)
+{
+        info->label_block = 1;
+        info->FBA_layout = 1;
+        info->format = DASD_FORMAT_LDL;
+        info->characteristics_size = sizeof(struct dasd_fba_characteristics);
+        memcpy(info->characteristics,
+               &((struct dasd_fba_private *) device->private)->rdc_data,
+               sizeof (struct dasd_fba_characteristics));
+        info->confdata_size = 0;
+        return 0;
+}
+
+static void
+dasd_fba_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req,
+                    struct irb *irb)
+{
+        char *page;
+        struct ccw1 *act, *end, *last;
+        int len, sl, sct, count;
+
+        page = (char *) get_zeroed_page(GFP_ATOMIC);
+        if (page == NULL) {
+                DEV_MESSAGE(KERN_ERR, device, " %s",
+                            "No memory to dump sense data");
+                return;
+        }
+        len = sprintf(page, KERN_ERR PRINTK_HEADER
+                      " I/O status report for device %s:\n",
+                      device->cdev->dev.bus_id);
+        len += sprintf(page + len, KERN_ERR PRINTK_HEADER
+                       " in req: %p CS: 0x%02X DS: 0x%02X\n", req,
+                       irb->scsw.cstat, irb->scsw.dstat);
+        len += sprintf(page + len, KERN_ERR PRINTK_HEADER
+                       " device %s: Failing CCW: %p\n",
+                       device->cdev->dev.bus_id,
+                       (void *) (addr_t) irb->scsw.cpa);
+        if (irb->esw.esw0.erw.cons) {
+                for (sl = 0; sl < 4; sl++) {
+                        len += sprintf(page + len, KERN_ERR PRINTK_HEADER
+                                       " Sense(hex) %2d-%2d:",
+                                       (8 * sl), ((8 * sl) + 7));
+
+                        for (sct = 0; sct < 8; sct++) {
+                                len += sprintf(page + len, " %02x",
+                                               irb->ecw[8 * sl + sct]);
+                        }
+                        len += sprintf(page + len, "\n");
+                }
+        } else {
+                len += sprintf(page + len, KERN_ERR PRINTK_HEADER
+                               " SORRY - NO VALID SENSE AVAILABLE\n");
+        }
+        MESSAGE_LOG(KERN_ERR, "%s",
+                    page + sizeof(KERN_ERR PRINTK_HEADER));
+
+        /* dump the Channel Program */
+        /* print first CCWs (maximum 8) */
+        act = req->cpaddr;
+        for (last = act; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);
+        end = min(act + 8, last);
+        len = sprintf(page, KERN_ERR PRINTK_HEADER
+                      " Related CP in req: %p\n", req);
+        while (act <= end) {
+                len += sprintf(page + len, KERN_ERR PRINTK_HEADER
+                               " CCW %p: %08X %08X DAT:",
+                               act, ((int *) act)[0], ((int *) act)[1]);
+                for (count = 0; count < 32 && count < act->count;
+                     count += sizeof(int))
+                        len += sprintf(page + len, " %08X",
+                                       ((int *) (addr_t) act->cda)
+                                       [(count>>2)]);
+                len += sprintf(page + len, "\n");
+                act++;
+        }
+        MESSAGE_LOG(KERN_ERR, "%s",
+                    page + sizeof(KERN_ERR PRINTK_HEADER));
+
+
+        /* print failing CCW area */
+        len = 0;
+        if (act <  ((struct ccw1 *)(addr_t) irb->scsw.cpa) - 2) {
+                act = ((struct ccw1 *)(addr_t) irb->scsw.cpa) - 2;
+                len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
+        }
+        end = min((struct ccw1 *)(addr_t) irb->scsw.cpa + 2, last);
+        while (act <= end) {
+                len += sprintf(page + len, KERN_ERR PRINTK_HEADER
+                               " CCW %p: %08X %08X DAT:",
+                               act, ((int *) act)[0], ((int *) act)[1]);
+                for (count = 0; count < 32 && count < act->count;
+                     count += sizeof(int))
+                        len += sprintf(page + len, " %08X",
+                                       ((int *) (addr_t) act->cda)
+                                       [(count>>2)]);
+                len += sprintf(page + len, "\n");
+                act++;
+        }
+
+        /* print last CCWs */
+        if (act <  last - 2) {
+                act = last - 2;
+                len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n");
+        }
+        while (act <= last) {
+                len += sprintf(page + len, KERN_ERR PRINTK_HEADER
+                               " CCW %p: %08X %08X DAT:",
+                               act, ((int *) act)[0], ((int *) act)[1]);
+                for (count = 0; count < 32 && count < act->count;
+                     count += sizeof(int))
+                        len += sprintf(page + len, " %08X",
+                                       ((int *) (addr_t) act->cda)
+                                       [(count>>2)]);
+                len += sprintf(page + len, "\n");
+                act++;
+        }
+        if (len > 0)
+                MESSAGE_LOG(KERN_ERR, "%s",
+                            page + sizeof(KERN_ERR PRINTK_HEADER));
+        free_page((unsigned long) page);
+}
+
+/*
+ * 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). For 64 bit one dasd_mchunkt_t structure has
+ * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use
+ * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In
+ * addition we have one define extent ccw + 16 bytes of data and a 
+ * locate record ccw for each block (stupid devices!) + 16 bytes of data.
+ * That makes:
+ * (8192 - 24 - 136 - 8 - 16) / 40 = 200.2 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 100.1 blocks
+ * for one request. Give a little safety and the result is 96.
+ */
+static struct dasd_discipline dasd_fba_discipline = {
+        .owner = THIS_MODULE,
+        .name = "FBA ",
+        .ebcname = "FBA ",
+        .max_blocks = 96,
+        .check_device = dasd_fba_check_characteristics,
+        .do_analysis = dasd_fba_do_analysis,
+        .fill_geometry = dasd_fba_fill_geometry,
+        .start_IO = dasd_start_IO,
+        .term_IO = dasd_term_IO,
+        .examine_error = dasd_fba_examine_error,
+        .erp_action = dasd_fba_erp_action,
+        .erp_postaction = dasd_fba_erp_postaction,
+        .build_cp = dasd_fba_build_cp,
+        .free_cp = dasd_fba_free_cp,
+        .dump_sense = dasd_fba_dump_sense,
+        .fill_info = dasd_fba_fill_info,
+};
+
+static int __init
+dasd_fba_init(void)
+{
+        int ret;
+
+        ASCEBC(dasd_fba_discipline.ebcname, 4);
+
+        ret = ccw_driver_register(&dasd_fba_driver);
+        if (ret)
+                return ret;
+
+        dasd_generic_auto_online(&dasd_fba_driver);
+        return 0;
+}
+
+static void __exit
+dasd_fba_cleanup(void)
+{
+        ccw_driver_unregister(&dasd_fba_driver);
+}
+
+module_init(dasd_fba_init);
+module_exit(dasd_fba_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:
+ */