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📄 device_if.m(10.41 KB)
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📄 genoffset.sh(3.58 KB)
📄 imgact_aout.c(9.45 KB)
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📄 imgact_elf.c(76.32 KB)
📄 imgact_elf32.c(1.47 KB)
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📄 imgact_shell.c(8.41 KB)
📄 init_main.c(24.31 KB)
📄 init_sysent.c(95.3 KB)
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📄 kern_condvar.c(11.28 KB)
📄 kern_conf.c(36.14 KB)
📄 kern_cons.c(15.75 KB)
📄 kern_context.c(3.59 KB)
📄 kern_cpu.c(30.77 KB)
📄 kern_cpuset.c(59.78 KB)
📄 kern_ctf.c(8.73 KB)
📄 kern_descrip.c(112.87 KB)
📄 kern_dtrace.c(2.94 KB)
📄 kern_dump.c(8.51 KB)
📄 kern_environment.c(22.75 KB)
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📄 kern_event.c(62.49 KB)
📄 kern_exec.c(46.67 KB)
📄 kern_exit.c(34.61 KB)
📄 kern_fail.c(29.32 KB)
📄 kern_ffclock.c(12.66 KB)
📄 kern_fork.c(28.29 KB)
📄 kern_hhook.c(13.58 KB)
📄 kern_idle.c(2.74 KB)
📄 kern_intr.c(40.44 KB)
📄 kern_jail.c(112.67 KB)
📄 kern_kcov.c(15.32 KB)
📄 kern_khelp.c(9.45 KB)
📄 kern_kthread.c(11.8 KB)
📄 kern_ktr.c(11.93 KB)
📄 kern_ktrace.c(31.41 KB)
📄 kern_linker.c(54.3 KB)
📄 kern_lock.c(46.99 KB)
📄 kern_lockf.c(64.46 KB)
📄 kern_lockstat.c(3.8 KB)
📄 kern_loginclass.c(6.69 KB)
📄 kern_malloc.c(37.09 KB)
📄 kern_mbuf.c(43.16 KB)
📄 kern_mib.c(24.26 KB)
📄 kern_module.c(11.05 KB)
📄 kern_mtxpool.c(5.82 KB)
📄 kern_mutex.c(33.62 KB)
📄 kern_ntptime.c(32.49 KB)
📄 kern_osd.c(12.37 KB)
📄 kern_physio.c(5.74 KB)
📄 kern_pmc.c(8.89 KB)
📄 kern_poll.c(15.86 KB)
📄 kern_priv.c(9.14 KB)
📄 kern_proc.c(80.01 KB)
📄 kern_procctl.c(19.48 KB)
📄 kern_prot.c(57.94 KB)
📄 kern_racct.c(34.01 KB)
📄 kern_rangelock.c(8.67 KB)
📄 kern_rctl.c(53.87 KB)
📄 kern_resource.c(36.66 KB)
📄 kern_rmlock.c(28.27 KB)
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📄 kern_sdt.c(2.05 KB)
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📄 kern_sendfile.c(33.97 KB)
📄 kern_sharedpage.c(10.37 KB)
📄 kern_shutdown.c(43.34 KB)
📄 kern_sig.c(101.89 KB)
📄 kern_switch.c(13.85 KB)
📄 kern_sx.c(40.27 KB)
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📄 kern_syscalls.c(6.74 KB)
📄 kern_sysctl.c(67.24 KB)
📄 kern_tc.c(55.73 KB)
📄 kern_thr.c(14.14 KB)
📄 kern_thread.c(41.75 KB)
📄 kern_time.c(40.89 KB)
📄 kern_timeout.c(43.08 KB)
📄 kern_tslog.c(3.44 KB)
📄 kern_ubsan.c(50.74 KB)
📄 kern_umtx.c(107.14 KB)
📄 kern_uuid.c(11.68 KB)
📄 kern_xxx.c(10.44 KB)
📄 ksched.c(6.56 KB)
📄 link_elf.c(47.99 KB)
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📄 makesyscalls.sh(23.57 KB)
📄 md4c.c(7.89 KB)
📄 md5c.c(9.56 KB)
📄 msi_if.m(2.48 KB)
📄 p1003_1b.c(8.84 KB)
📄 pic_if.m(3.9 KB)
📄 posix4_mib.c(5.59 KB)
📄 sched_4bsd.c(45.03 KB)
📄 sched_ule.c(82.65 KB)
📄 serdev_if.m(3.49 KB)
📄 stack_protector.c(613 B)
📄 subr_acl_nfs4.c(37.42 KB)
📄 subr_acl_posix1e.c(17.71 KB)
📄 subr_atomic64.c(3.97 KB)
📄 subr_autoconf.c(7.7 KB)
📄 subr_blist.c(31.88 KB)
📄 subr_boot.c(5.8 KB)
📄 subr_bufring.c(2.21 KB)
📄 subr_bus.c(145.4 KB)
📄 subr_bus_dma.c(19.67 KB)
📄 subr_busdma_bufalloc.c(5.24 KB)
📄 subr_capability.c(11.93 KB)
📄 subr_clock.c(10.61 KB)
📄 subr_compressor.c(13.11 KB)
📄 subr_counter.c(4.44 KB)
📄 subr_coverage.c(6.17 KB)
📄 subr_csan.c(25.39 KB)
📄 subr_devmap.c(9.8 KB)
📄 subr_devstat.c(16.21 KB)
📄 subr_disk.c(8.54 KB)
📄 subr_dummy_vdso_tc.c(1.7 KB)
📄 subr_early.c(2.26 KB)
📄 subr_epoch.c(25.02 KB)
📄 subr_eventhandler.c(9.17 KB)
📄 subr_fattime.c(9.98 KB)
📄 subr_filter.c(12.2 KB)
📄 subr_firmware.c(13.88 KB)
📄 subr_gtaskqueue.c(20.19 KB)
📄 subr_hash.c(4.8 KB)
📄 subr_hints.c(12.87 KB)
📄 subr_intr.c(40.61 KB)
📄 subr_kdb.c(16.13 KB)
📄 subr_kobj.c(7.1 KB)
📄 subr_lock.c(18.81 KB)
📄 subr_log.c(7.64 KB)
📄 subr_mchain.c(11.06 KB)
📄 subr_module.c(12.98 KB)
📄 subr_msgbuf.c(10.6 KB)
📄 subr_param.c(10.93 KB)
📄 subr_pcpu.c(10.18 KB)
📄 subr_pctrie.c(20.99 KB)
📄 subr_physmem.c(11.52 KB)
📄 subr_pidctrl.c(5.43 KB)
📄 subr_power.c(3.13 KB)
📄 subr_prf.c(27.42 KB)
📄 subr_prng.c(3.36 KB)
📄 subr_prof.c(15.43 KB)
📄 subr_rangeset.c(8.5 KB)
📄 subr_rman.c(27.61 KB)
📄 subr_rtc.c(11.42 KB)
📄 subr_sbuf.c(20.53 KB)
📄 subr_scanf.c(15.59 KB)
📄 subr_sfbuf.c(6.17 KB)
📄 subr_sglist.c(22.83 KB)
📄 subr_sleepqueue.c(39.43 KB)
📄 subr_smp.c(31.62 KB)
📄 subr_smr.c(20.17 KB)
📄 subr_stack.c(6.47 KB)
📄 subr_stats.c(103.01 KB)
📄 subr_syscall.c(7.98 KB)
📄 subr_taskqueue.c(21.1 KB)
📄 subr_terminal.c(15.52 KB)
📄 subr_trap.c(10.87 KB)
📄 subr_turnstile.c(35.58 KB)
📄 subr_uio.c(11.38 KB)
📄 subr_unit.c(22.97 KB)
📄 subr_vmem.c(43.25 KB)
📄 subr_witness.c(84.59 KB)
📄 sys_capability.c(15.06 KB)
📄 sys_eventfd.c(8.42 KB)
📄 sys_generic.c(44.22 KB)
📄 sys_getrandom.c(4.21 KB)
📄 sys_pipe.c(45.14 KB)
📄 sys_procdesc.c(14.57 KB)
📄 sys_process.c(30.73 KB)
📄 sys_socket.c(20.11 KB)
📄 syscalls.c(22.73 KB)
📄 syscalls.master(60.26 KB)
📄 systrace_args.c(178.49 KB)
📄 sysv_ipc.c(6.53 KB)
📄 sysv_msg.c(48.65 KB)
📄 sysv_sem.c(49.85 KB)
📄 sysv_shm.c(43.93 KB)
📄 tty.c(55.14 KB)
📄 tty_compat.c(11.46 KB)
📄 tty_info.c(9.93 KB)
📄 tty_inq.c(12.22 KB)
📄 tty_outq.c(8.74 KB)
📄 tty_pts.c(19.74 KB)
📄 tty_tty.c(2.83 KB)
📄 tty_ttydisc.c(28.6 KB)
📄 uipc_accf.c(8.07 KB)
📄 uipc_debug.c(12.42 KB)
📄 uipc_domain.c(13.13 KB)
📄 uipc_ktls.c(55.7 KB)
📄 uipc_mbuf.c(52.45 KB)
📄 uipc_mbuf2.c(12.64 KB)
📄 uipc_mbufhash.c(4.9 KB)
📄 uipc_mqueue.c(64.64 KB)
📄 uipc_sem.c(25.18 KB)
📄 uipc_shm.c(50.47 KB)
📄 uipc_sockbuf.c(42.9 KB)
📄 uipc_socket.c(110.61 KB)
📄 uipc_syscalls.c(35.94 KB)
📄 uipc_usrreq.c(75.11 KB)
📄 vfs_acl.c(14.5 KB)
📄 vfs_aio.c(76.32 KB)
📄 vfs_bio.c(145.39 KB)
📄 vfs_cache.c(143.09 KB)
📄 vfs_cluster.c(28.36 KB)
📄 vfs_default.c(33.16 KB)
📄 vfs_export.c(14.55 KB)
📄 vfs_extattr.c(17.91 KB)
📄 vfs_hash.c(6 KB)
📄 vfs_init.c(15.86 KB)
📄 vfs_lookup.c(45.48 KB)
📄 vfs_mount.c(62.58 KB)
📄 vfs_mountroot.c(26.23 KB)
📄 vfs_subr.c(167.52 KB)
📄 vfs_syscalls.c(106.86 KB)
📄 vfs_vnops.c(86.28 KB)
📄 vnode_if.src(13.66 KB)

Editing: subr_bus_dma.c

/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 2012 EMC Corp.
 * All rights reserved.
 *
 * Copyright (c) 1997, 1998 Justin T. Gibbs.
 * 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 THE AUTHOR AND CONTRIBUTORS ``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 THE AUTHOR OR CONTRIBUTORS 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.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include "opt_bus.h"
#include "opt_iommu.h"

#include <sys/param.h>
#include <sys/conf.h>
#include <sys/systm.h>
#include <sys/bio.h>
#include <sys/bus.h>
#include <sys/callout.h>
#include <sys/ktr.h>
#include <sys/mbuf.h>
#include <sys/memdesc.h>
#include <sys/proc.h>
#include <sys/uio.h>

#include <vm/vm.h>
#include <vm/vm_page.h>
#include <vm/vm_map.h>
#include <vm/pmap.h>

#include <cam/cam.h>
#include <cam/cam_ccb.h>

#include <opencrypto/cryptodev.h>

#include <machine/bus.h>

/*
 * Load up data starting at offset within a region specified by a
 * list of virtual address ranges until either length or the region
 * are exhausted.
 */
static int
_bus_dmamap_load_vlist(bus_dma_tag_t dmat, bus_dmamap_t map,
    bus_dma_segment_t *list, int sglist_cnt, struct pmap *pmap, int *nsegs,
    int flags, size_t offset, size_t length)
{
	int error;

error = 0;
	for (; sglist_cnt > 0 && length != 0; sglist_cnt--, list++) {
		char *addr;
		size_t ds_len;

KASSERT((offset < list->ds_len),
		    ("Invalid mid-segment offset"));
		addr = (char *)(uintptr_t)list->ds_addr + offset;
		ds_len = list->ds_len - offset;
		offset = 0;
		if (ds_len > length)
			ds_len = length;
		length -= ds_len;
		KASSERT((ds_len != 0), ("Segment length is zero"));
		error = _bus_dmamap_load_buffer(dmat, map, addr, ds_len, pmap,
		    flags, NULL, nsegs);
		if (error)
			break;
	}
	return (error);
}

/*
 * Load a list of physical addresses.
 */
static int
_bus_dmamap_load_plist(bus_dma_tag_t dmat, bus_dmamap_t map,
    bus_dma_segment_t *list, int sglist_cnt, int *nsegs, int flags)
{
	int error;

error = 0;
	for (; sglist_cnt > 0; sglist_cnt--, list++) {
		error = _bus_dmamap_load_phys(dmat, map,
		    (vm_paddr_t)list->ds_addr, list->ds_len, flags, NULL,
		    nsegs);
		if (error)
			break;
	}
	return (error);
}

/*
 * Load an unmapped mbuf
 */
static int
_bus_dmamap_load_mbuf_epg(bus_dma_tag_t dmat, bus_dmamap_t map,
    struct mbuf *m, bus_dma_segment_t *segs, int *nsegs, int flags)
{
	int error, i, off, len, pglen, pgoff, seglen, segoff;

M_ASSERTEXTPG(m);

len = m->m_len;
	error = 0;

/* Skip over any data removed from the front. */
	off = mtod(m, vm_offset_t);

if (m->m_epg_hdrlen != 0) {
		if (off >= m->m_epg_hdrlen) {
			off -= m->m_epg_hdrlen;
		} else {
			seglen = m->m_epg_hdrlen - off;
			segoff = off;
			seglen = min(seglen, len);
			off = 0;
			len -= seglen;
			error = _bus_dmamap_load_buffer(dmat, map,
			    &m->m_epg_hdr[segoff], seglen, kernel_pmap,
			    flags, segs, nsegs);
		}
	}
	pgoff = m->m_epg_1st_off;
	for (i = 0; i < m->m_epg_npgs && error == 0 && len > 0; i++) {
		pglen = m_epg_pagelen(m, i, pgoff);
		if (off >= pglen) {
			off -= pglen;
			pgoff = 0;
			continue;
		}
		seglen = pglen - off;
		segoff = pgoff + off;
		off = 0;
		seglen = min(seglen, len);
		len -= seglen;
		error = _bus_dmamap_load_phys(dmat, map,
		    m->m_epg_pa[i] + segoff, seglen, flags, segs, nsegs);
		pgoff = 0;
	};
	if (len != 0 && error == 0) {
		KASSERT((off + len) <= m->m_epg_trllen,
		    ("off + len > trail (%d + %d > %d)", off, len,
		    m->m_epg_trllen));
		error = _bus_dmamap_load_buffer(dmat, map,
		    &m->m_epg_trail[off], len, kernel_pmap, flags, segs,
		    nsegs);
	}
	return (error);
}

/*
 * Load an mbuf chain.
 */
static int
_bus_dmamap_load_mbuf_sg(bus_dma_tag_t dmat, bus_dmamap_t map,
    struct mbuf *m0, bus_dma_segment_t *segs, int *nsegs, int flags)
{
	struct mbuf *m;
	int error;

error = 0;
	for (m = m0; m != NULL && error == 0; m = m->m_next) {
		if (m->m_len > 0) {
			if ((m->m_flags & M_EXTPG) != 0)
				error = _bus_dmamap_load_mbuf_epg(dmat,
				    map, m, segs, nsegs, flags);
			else
				error = _bus_dmamap_load_buffer(dmat, map,
				    m->m_data, m->m_len, kernel_pmap,
				    flags | BUS_DMA_LOAD_MBUF, segs, nsegs);
		}
	}
	CTR5(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d nsegs %d",
	    __func__, dmat, flags, error, *nsegs);
	return (error);
}

/*
 * Load from block io.
 */
static int
_bus_dmamap_load_bio(bus_dma_tag_t dmat, bus_dmamap_t map, struct bio *bio,
    int *nsegs, int flags)
{

if ((bio->bio_flags & BIO_VLIST) != 0) {
		bus_dma_segment_t *segs = (bus_dma_segment_t *)bio->bio_data;
		return (_bus_dmamap_load_vlist(dmat, map, segs, bio->bio_ma_n,
		    kernel_pmap, nsegs, flags, bio->bio_ma_offset,
		    bio->bio_bcount));
	}

if ((bio->bio_flags & BIO_UNMAPPED) != 0)
		return (_bus_dmamap_load_ma(dmat, map, bio->bio_ma,
		    bio->bio_bcount, bio->bio_ma_offset, flags, NULL, nsegs));

return (_bus_dmamap_load_buffer(dmat, map, bio->bio_data,
	    bio->bio_bcount, kernel_pmap, flags, NULL, nsegs));
}

int
bus_dmamap_load_ma_triv(bus_dma_tag_t dmat, bus_dmamap_t map,
    struct vm_page **ma, bus_size_t tlen, int ma_offs, int flags,
    bus_dma_segment_t *segs, int *segp)
{
	vm_paddr_t paddr;
	bus_size_t len;
	int error, i;

error = 0;
	for (i = 0; tlen > 0; i++, tlen -= len) {
		len = min(PAGE_SIZE - ma_offs, tlen);
		paddr = VM_PAGE_TO_PHYS(ma[i]) + ma_offs;
		error = _bus_dmamap_load_phys(dmat, map, paddr, len,
		    flags, segs, segp);
		if (error != 0)
			break;
		ma_offs = 0;
	}
	return (error);
}

/*
 * Load a cam control block.
 */
static int
_bus_dmamap_load_ccb(bus_dma_tag_t dmat, bus_dmamap_t map, union ccb *ccb,
		    int *nsegs, int flags)
{
	struct ccb_hdr *ccb_h;
	void *data_ptr;
	int error;
	uint32_t dxfer_len;
	uint16_t sglist_cnt;

error = 0;
	ccb_h = &ccb->ccb_h;
	switch (ccb_h->func_code) {
	case XPT_SCSI_IO: {
		struct ccb_scsiio *csio;

csio = &ccb->csio;
		data_ptr = csio->data_ptr;
		dxfer_len = csio->dxfer_len;
		sglist_cnt = csio->sglist_cnt;
		break;
	}
	case XPT_CONT_TARGET_IO: {
		struct ccb_scsiio *ctio;

ctio = &ccb->ctio;
		data_ptr = ctio->data_ptr;
		dxfer_len = ctio->dxfer_len;
		sglist_cnt = ctio->sglist_cnt;
		break;
	}
	case XPT_ATA_IO: {
		struct ccb_ataio *ataio;

ataio = &ccb->ataio;
		data_ptr = ataio->data_ptr;
		dxfer_len = ataio->dxfer_len;
		sglist_cnt = 0;
		break;
	}
	case XPT_NVME_IO:
	case XPT_NVME_ADMIN: {
		struct ccb_nvmeio *nvmeio;

nvmeio = &ccb->nvmeio;
		data_ptr = nvmeio->data_ptr;
		dxfer_len = nvmeio->dxfer_len;
		sglist_cnt = nvmeio->sglist_cnt;
		break;
	}
	default:
		panic("_bus_dmamap_load_ccb: Unsupported func code %d",
		    ccb_h->func_code);
	}

switch ((ccb_h->flags & CAM_DATA_MASK)) {
	case CAM_DATA_VADDR:
		error = _bus_dmamap_load_buffer(dmat, map, data_ptr, dxfer_len,
		    kernel_pmap, flags, NULL, nsegs);
		break;
	case CAM_DATA_PADDR:
		error = _bus_dmamap_load_phys(dmat, map,
		    (vm_paddr_t)(uintptr_t)data_ptr, dxfer_len, flags, NULL,
		    nsegs);
		break;
	case CAM_DATA_SG:
		error = _bus_dmamap_load_vlist(dmat, map,
		    (bus_dma_segment_t *)data_ptr, sglist_cnt, kernel_pmap,
		    nsegs, flags, 0, dxfer_len);
		break;
	case CAM_DATA_SG_PADDR:
		error = _bus_dmamap_load_plist(dmat, map,
		    (bus_dma_segment_t *)data_ptr, sglist_cnt, nsegs, flags);
		break;
	case CAM_DATA_BIO:
		error = _bus_dmamap_load_bio(dmat, map, (struct bio *)data_ptr,
		    nsegs, flags);
		break;
	default:
		panic("_bus_dmamap_load_ccb: flags 0x%X unimplemented",
		    ccb_h->flags);
	}
	return (error);
}

/*
 * Load a uio.
 */
static int
_bus_dmamap_load_uio(bus_dma_tag_t dmat, bus_dmamap_t map, struct uio *uio,
    int *nsegs, int flags)
{
	bus_size_t resid;
	bus_size_t minlen;
	struct iovec *iov;
	pmap_t pmap;
	caddr_t addr;
	int error, i;

if (uio->uio_segflg == UIO_USERSPACE) {
		KASSERT(uio->uio_td != NULL,
			("bus_dmamap_load_uio: USERSPACE but no proc"));
		pmap = vmspace_pmap(uio->uio_td->td_proc->p_vmspace);
	} else
		pmap = kernel_pmap;
	resid = uio->uio_resid;
	iov = uio->uio_iov;
	error = 0;

for (i = 0; i < uio->uio_iovcnt && resid != 0 && !error; i++) {
		/*
		 * Now at the first iovec to load.  Load each iovec
		 * until we have exhausted the residual count.
		 */

addr = (caddr_t) iov[i].iov_base;
		minlen = resid < iov[i].iov_len ? resid : iov[i].iov_len;
		if (minlen > 0) {
			error = _bus_dmamap_load_buffer(dmat, map, addr,
			    minlen, pmap, flags, NULL, nsegs);
			resid -= minlen;
		}
	}

return (error);
}

/*
 * Map the buffer buf into bus space using the dmamap map.
 */
int
bus_dmamap_load(bus_dma_tag_t dmat, bus_dmamap_t map, void *buf,
    bus_size_t buflen, bus_dmamap_callback_t *callback,
    void *callback_arg, int flags)
{
	bus_dma_segment_t *segs;
	struct memdesc mem;
	int error;
	int nsegs;

if ((flags & BUS_DMA_NOWAIT) == 0) {
		mem = memdesc_vaddr(buf, buflen);
		_bus_dmamap_waitok(dmat, map, &mem, callback, callback_arg);
	}

nsegs = -1;
	error = _bus_dmamap_load_buffer(dmat, map, buf, buflen, kernel_pmap,
	    flags, NULL, &nsegs);
	nsegs++;

CTR5(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d nsegs %d",
	    __func__, dmat, flags, error, nsegs);

if (error == EINPROGRESS)
		return (error);

segs = _bus_dmamap_complete(dmat, map, NULL, nsegs, error);
	if (error)
		(*callback)(callback_arg, segs, 0, error);
	else
		(*callback)(callback_arg, segs, nsegs, 0);

/*
	 * Return ENOMEM to the caller so that it can pass it up the stack.
	 * This error only happens when NOWAIT is set, so deferral is disabled.
	 */
	if (error == ENOMEM)
		return (error);

return (0);
}

int
bus_dmamap_load_mbuf(bus_dma_tag_t dmat, bus_dmamap_t map, struct mbuf *m0,
    bus_dmamap_callback2_t *callback, void *callback_arg, int flags)
{
	bus_dma_segment_t *segs;
	int nsegs, error;

M_ASSERTPKTHDR(m0);

flags |= BUS_DMA_NOWAIT;
	nsegs = -1;
	error = _bus_dmamap_load_mbuf_sg(dmat, map, m0, NULL, &nsegs, flags);
	++nsegs;

segs = _bus_dmamap_complete(dmat, map, NULL, nsegs, error);
	if (error)
		(*callback)(callback_arg, segs, 0, 0, error);
	else
		(*callback)(callback_arg, segs, nsegs, m0->m_pkthdr.len, error);

CTR5(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d nsegs %d",
	    __func__, dmat, flags, error, nsegs);
	return (error);
}

int
bus_dmamap_load_mbuf_sg(bus_dma_tag_t dmat, bus_dmamap_t map, struct mbuf *m0,
    bus_dma_segment_t *segs, int *nsegs, int flags)
{
	int error;

flags |= BUS_DMA_NOWAIT;
	*nsegs = -1;
	error = _bus_dmamap_load_mbuf_sg(dmat, map, m0, segs, nsegs, flags);
	++*nsegs;
	_bus_dmamap_complete(dmat, map, segs, *nsegs, error);
	return (error);
}

int
bus_dmamap_load_uio(bus_dma_tag_t dmat, bus_dmamap_t map, struct uio *uio,
    bus_dmamap_callback2_t *callback, void *callback_arg, int flags)
{
	bus_dma_segment_t *segs;
	int nsegs, error;

flags |= BUS_DMA_NOWAIT;
	nsegs = -1;
	error = _bus_dmamap_load_uio(dmat, map, uio, &nsegs, flags);
	nsegs++;

segs = _bus_dmamap_complete(dmat, map, NULL, nsegs, error);
	if (error)
		(*callback)(callback_arg, segs, 0, 0, error);
	else
		(*callback)(callback_arg, segs, nsegs, uio->uio_resid, error);

CTR5(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d nsegs %d",
	    __func__, dmat, flags, error, nsegs);
	return (error);
}

int
bus_dmamap_load_ccb(bus_dma_tag_t dmat, bus_dmamap_t map, union ccb *ccb,
		    bus_dmamap_callback_t *callback, void *callback_arg,
		    int flags)
{
	bus_dma_segment_t *segs;
	struct ccb_hdr *ccb_h;
	struct memdesc mem;
	int error;
	int nsegs;

ccb_h = &ccb->ccb_h;
	if ((ccb_h->flags & CAM_DIR_MASK) == CAM_DIR_NONE) {
		callback(callback_arg, NULL, 0, 0);
		return (0);
	}
	if ((flags & BUS_DMA_NOWAIT) == 0) {
		mem = memdesc_ccb(ccb);
		_bus_dmamap_waitok(dmat, map, &mem, callback, callback_arg);
	}
	nsegs = -1;
	error = _bus_dmamap_load_ccb(dmat, map, ccb, &nsegs, flags);
	nsegs++;

CTR5(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d nsegs %d",
	    __func__, dmat, flags, error, nsegs);

if (error == EINPROGRESS)
		return (error);

segs = _bus_dmamap_complete(dmat, map, NULL, nsegs, error);
	if (error)
		(*callback)(callback_arg, segs, 0, error);
	else
		(*callback)(callback_arg, segs, nsegs, error);
	/*
	 * Return ENOMEM to the caller so that it can pass it up the stack.
	 * This error only happens when NOWAIT is set, so deferral is disabled.
	 */
	if (error == ENOMEM)
		return (error);

return (0);
}

int
bus_dmamap_load_bio(bus_dma_tag_t dmat, bus_dmamap_t map, struct bio *bio,
		    bus_dmamap_callback_t *callback, void *callback_arg,
		    int flags)
{
	bus_dma_segment_t *segs;
	struct memdesc mem;
	int error;
	int nsegs;

if ((flags & BUS_DMA_NOWAIT) == 0) {
		mem = memdesc_bio(bio);
		_bus_dmamap_waitok(dmat, map, &mem, callback, callback_arg);
	}
	nsegs = -1;
	error = _bus_dmamap_load_bio(dmat, map, bio, &nsegs, flags);
	nsegs++;

CTR5(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d nsegs %d",
	    __func__, dmat, flags, error, nsegs);

if (error == EINPROGRESS)
		return (error);

return (0);
}

int
bus_dmamap_load_mem(bus_dma_tag_t dmat, bus_dmamap_t map,
    struct memdesc *mem, bus_dmamap_callback_t *callback,
    void *callback_arg, int flags)
{
	bus_dma_segment_t *segs;
	int error;
	int nsegs;

if ((flags & BUS_DMA_NOWAIT) == 0)
		_bus_dmamap_waitok(dmat, map, mem, callback, callback_arg);

nsegs = -1;
	error = 0;
	switch (mem->md_type) {
	case MEMDESC_VADDR:
		error = _bus_dmamap_load_buffer(dmat, map, mem->u.md_vaddr,
		    mem->md_opaque, kernel_pmap, flags, NULL, &nsegs);
		break;
	case MEMDESC_PADDR:
		error = _bus_dmamap_load_phys(dmat, map, mem->u.md_paddr,
		    mem->md_opaque, flags, NULL, &nsegs);
		break;
	case MEMDESC_VLIST:
		error = _bus_dmamap_load_vlist(dmat, map, mem->u.md_list,
		    mem->md_opaque, kernel_pmap, &nsegs, flags, 0, SIZE_T_MAX);
		break;
	case MEMDESC_PLIST:
		error = _bus_dmamap_load_plist(dmat, map, mem->u.md_list,
		    mem->md_opaque, &nsegs, flags);
		break;
	case MEMDESC_BIO:
		error = _bus_dmamap_load_bio(dmat, map, mem->u.md_bio,
		    &nsegs, flags);
		break;
	case MEMDESC_UIO:
		error = _bus_dmamap_load_uio(dmat, map, mem->u.md_uio,
		    &nsegs, flags);
		break;
	case MEMDESC_MBUF:
		error = _bus_dmamap_load_mbuf_sg(dmat, map, mem->u.md_mbuf,
		    NULL, &nsegs, flags);
		break;
	case MEMDESC_CCB:
		error = _bus_dmamap_load_ccb(dmat, map, mem->u.md_ccb, &nsegs,
		    flags);
		break;
	}
	nsegs++;

CTR5(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d nsegs %d",
	    __func__, dmat, flags, error, nsegs);

if (error == EINPROGRESS)
		return (error);

segs = _bus_dmamap_complete(dmat, map, NULL, nsegs, error);
	if (error)
		(*callback)(callback_arg, segs, 0, error);
	else
		(*callback)(callback_arg, segs, nsegs, 0);

/*
	 * Return ENOMEM to the caller so that it can pass it up the stack.
	 * This error only happens when NOWAIT is set, so deferral is disabled.
	 */
	if (error == ENOMEM)
		return (error);

return (0);
}

int
bus_dmamap_load_crp_buffer(bus_dma_tag_t dmat, bus_dmamap_t map,
    struct crypto_buffer *cb, bus_dmamap_callback_t *callback,
    void *callback_arg, int flags)
{
	bus_dma_segment_t *segs;
	int error;
	int nsegs;

flags |= BUS_DMA_NOWAIT;
	nsegs = -1;
	error = 0;
	switch (cb->cb_type) {
	case CRYPTO_BUF_CONTIG:
		error = _bus_dmamap_load_buffer(dmat, map, cb->cb_buf,
		    cb->cb_buf_len, kernel_pmap, flags, NULL, &nsegs);
		break;
	case CRYPTO_BUF_MBUF:
		error = _bus_dmamap_load_mbuf_sg(dmat, map, cb->cb_mbuf,
		    NULL, &nsegs, flags);
		break;
	case CRYPTO_BUF_UIO:
		error = _bus_dmamap_load_uio(dmat, map, cb->cb_uio, &nsegs,
		    flags);
		break;
	case CRYPTO_BUF_VMPAGE:
		error = _bus_dmamap_load_ma(dmat, map, cb->cb_vm_page,
		    cb->cb_vm_page_len, cb->cb_vm_page_offset, flags, NULL,
		    &nsegs);
		break;
	default:
		error = EINVAL;
	}
	nsegs++;

CTR5(KTR_BUSDMA, "%s: tag %p tag flags 0x%x error %d nsegs %d",
	    __func__, dmat, flags, error, nsegs);

if (error == EINPROGRESS)
		return (error);

segs = _bus_dmamap_complete(dmat, map, NULL, nsegs, error);
	if (error)
		(*callback)(callback_arg, segs, 0, error);
	else
		(*callback)(callback_arg, segs, nsegs, 0);

/*
	 * Return ENOMEM to the caller so that it can pass it up the stack.
	 * This error only happens when NOWAIT is set, so deferral is disabled.
	 */
	if (error == ENOMEM)
		return (error);

return (0);
}

int
bus_dmamap_load_crp(bus_dma_tag_t dmat, bus_dmamap_t map, struct cryptop *crp,
    bus_dmamap_callback_t *callback, void *callback_arg, int flags)
{
	return (bus_dmamap_load_crp_buffer(dmat, map, &crp->crp_buf, callback,
	    callback_arg, flags));
}

void
bus_dma_template_init(bus_dma_template_t *t, bus_dma_tag_t parent)
{

if (t == NULL)
		return;

t->parent = parent;
	t->alignment = 1;
	t->boundary = 0;
	t->lowaddr = t->highaddr = BUS_SPACE_MAXADDR;
	t->maxsize = t->maxsegsize = BUS_SPACE_MAXSIZE;
	t->nsegments = BUS_SPACE_UNRESTRICTED;
	t->lockfunc = NULL;
	t->lockfuncarg = NULL;
	t->flags = 0;
}

int
bus_dma_template_tag(bus_dma_template_t *t, bus_dma_tag_t *dmat)
{

if (t == NULL || dmat == NULL)
		return (EINVAL);

return (bus_dma_tag_create(t->parent, t->alignment, t->boundary,
	    t->lowaddr, t->highaddr, NULL, NULL, t->maxsize,
	    t->nsegments, t->maxsegsize, t->flags, t->lockfunc, t->lockfuncarg,
	    dmat));
}

void
bus_dma_template_fill(bus_dma_template_t *t, bus_dma_param_t *kv, u_int count)
{
	bus_dma_param_t *pkv;

while (count) {
		pkv = &kv[--count];
		switch (pkv->key) {
		case BD_PARAM_PARENT:
			t->parent = pkv->ptr;
			break;
		case BD_PARAM_ALIGNMENT:
			t->alignment = pkv->num;
			break;
		case BD_PARAM_BOUNDARY:
			t->boundary = pkv->num;
			break;
		case BD_PARAM_LOWADDR:
			t->lowaddr = pkv->pa;
			break;
		case BD_PARAM_HIGHADDR:
			t->highaddr = pkv->pa;
			break;
		case BD_PARAM_MAXSIZE:
			t->maxsize = pkv->num;
			break;
		case BD_PARAM_NSEGMENTS:
			t->nsegments = pkv->num;
			break;
		case BD_PARAM_MAXSEGSIZE:
			t->maxsegsize = pkv->num;
			break;
		case BD_PARAM_FLAGS:
			t->flags = pkv->num;
			break;
		case BD_PARAM_LOCKFUNC:
			t->lockfunc = pkv->ptr;
			break;
		case BD_PARAM_LOCKFUNCARG:
			t->lockfuncarg = pkv->ptr;
			break;
		case BD_PARAM_NAME:
			t->name = pkv->ptr;
			break;
		case BD_PARAM_INVALID:
		default:
			KASSERT(0, ("Invalid key %d\n", pkv->key));
			break;
		}
	}
	return;
}

#ifndef IOMMU
bool bus_dma_iommu_set_buswide(device_t dev);
int bus_dma_iommu_load_ident(bus_dma_tag_t dmat, bus_dmamap_t map,
    vm_paddr_t start, vm_size_t length, int flags);

bool
bus_dma_iommu_set_buswide(device_t dev)
{
	return (false);
}

int
bus_dma_iommu_load_ident(bus_dma_tag_t dmat, bus_dmamap_t map,
    vm_paddr_t start, vm_size_t length, int flags)
{
	return (0);
}
#endif

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