/*- * Copyright (C) 2000 Benno Rice. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * Disk I/O routines using Open Firmware */ #include #include #include #include #include #include "disk.h" #include "libofw.h" static int ofwd_init(void); static int ofwd_strategy(void *devdata, int flag, daddr_t dblk, size_t size, char *buf, size_t *rsize); static int ofwd_open(struct open_file *f, ...); static int ofwd_close(struct open_file *f); static int ofwd_ioctl(struct open_file *f, u_long cmd, void *data); static int ofwd_print(int verbose); static char * ofwd_fmtdev(struct devdesc *); static int ofwd_parsedev(struct devdesc **, const char *, const char **); static bool ofwd_match(struct devsw *, const char *); struct devsw ofwdisk = { .dv_name = "block", .dv_type = DEVT_OFDISK, .dv_init = ofwd_init, .dv_strategy = ofwd_strategy, .dv_open = ofwd_open, .dv_close = ofwd_close, .dv_ioctl = ofwd_ioctl, .dv_print = ofwd_print, .dv_cleanup = nullsys, .dv_match = ofwd_match, .dv_fmtdev = ofwd_fmtdev, .dv_parsedev = ofwd_parsedev, }; /* * We're not guaranteed to be able to open a device more than once and there * is no OFW standard method to determine whether a device is already opened. * Opening a device multiple times simultaneously happens to work with most * OFW block device drivers but triggers a trap with at least the driver for * the on-board controllers of Sun Fire V100 and Ultra 1. Upper layers and MI * code expect to be able to open a device more than once however. Given that * different partitions of the same device might be opened at the same time as * done by ZFS, we can't generally just keep track of the opened devices and * reuse the instance handle when asked to open an already opened device. So * the best we can do is to cache the lastly used device path and close and * open devices in ofwd_strategy() as needed. */ static struct ofw_devdesc *kdp; static int ofwd_init(void) { return (0); } static int ofwd_strategy(void *devdata, int flag __unused, daddr_t dblk, size_t size, char *buf, size_t *rsize) { struct ofw_devdesc *dp = (struct ofw_devdesc *)devdata; daddr_t pos; int n; if (dp != kdp) { if (kdp != NULL) { #if !defined(__powerpc__) OF_close(kdp->d_handle); #endif kdp = NULL; } if ((dp->d_handle = OF_open(dp->d_path)) == -1) return (ENOENT); kdp = dp; } pos = dblk * 512; do { if (OF_seek(dp->d_handle, pos) < 0) return (EIO); n = OF_read(dp->d_handle, buf, size); if (n < 0 && n != -2) return (EIO); } while (n == -2); *rsize = size; return (0); } static int ofwd_open(struct open_file *f, ...) { struct ofw_devdesc *dp; va_list vl; va_start(vl, f); dp = va_arg(vl, struct ofw_devdesc *); va_end(vl); if (dp != kdp) { if (kdp != NULL) { OF_close(kdp->d_handle); kdp = NULL; } if ((dp->d_handle = OF_open(dp->d_path)) == -1) { printf("%s: Could not open %s\n", __func__, dp->d_path); return (ENOENT); } kdp = dp; } return (0); } static int ofwd_close(struct open_file *f) { struct ofw_devdesc *dev = f->f_devdata; if (dev == kdp) { #if !defined(__powerpc__) OF_close(dev->d_handle); #endif kdp = NULL; } return (0); } static int ofwd_ioctl(struct open_file *f, u_long cmd, void *data) { struct ofw_devdesc *dev = f->f_devdata; int block_size; unsigned int n; switch (cmd) { case DIOCGSECTORSIZE: block_size = OF_block_size(dev->d_handle); *(u_int *)data = block_size; break; case DIOCGMEDIASIZE: block_size = OF_block_size(dev->d_handle); n = OF_blocks(dev->d_handle); *(uint64_t *)data = ((uint64_t)n * block_size); break; default: return (ENOTTY); } return (0); } static int ofwd_print(int verbose __unused) { uintmax_t block_size, n; int ret; char line[80]; /* * We don't have a list of devices since we don't parse the whole OFW * tree to find them. Instead, if we have an open device print info * about it. Otherwise say we can't. Makes lsdev nicer. */ if ((ret = pager_output("block devices:\n")) != 0) return (ret); if (kdp != NULL) { block_size = OF_block_size(kdp->d_handle); n = OF_blocks(kdp->d_handle); snprintf(line, sizeof(line), " %s: OFW block device (%ju X %ju): %ju bytes\n", kdp->d_path, n, block_size, n * block_size); if ((ret = pager_output(line)) != 0) return (ret); } else { if ((ret = pager_output(" none are open, so no info\n")) != 0) return (ret); } return (0); } static bool ofwd_match(struct devsw *devsw, const char *devspec) { const char *path; return (ofw_path_to_handle(devspec, devsw->dv_name, &path) != -1); } static char * ofwd_fmtdev(struct devdesc *idev) { struct ofw_devdesc *dev = (struct ofw_devdesc *)idev; return (dev->d_path); } static int ofwd_parsedev(struct devdesc **dev, const char *devspec, const char **path) { return (ofw_common_parsedev(dev, devspec, path, ofwdisk.dv_name)); }