/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 * Copyright (c) 2016 by Delphix. All rights reserved.
 */

#pragma ident   "%Z%%M% %I%     %E% SMI"

#include <sys/types.h>
#include <sys/kmem.h>
#include <sys/systm.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/sunndi.h>
#include <sys/ddidmareq.h>
#include <sys/ddi_impldefs.h>
#include <sys/ndi_impldefs.h>
#include <sys/fcode.h>

/*
 * We want to call the attachment point's dma ctl op, not its parent's
 * dma ctl op, so we have to code this ourselves.
 */

int
fc_ddi_dma_alloc_handle(dev_info_t *dip, ddi_dma_attr_t *attr,
    int (*waitfp)(caddr_t), caddr_t arg, ddi_dma_handle_t *handlep)
{
        int (*funcp)(dev_info_t *, dev_info_t *, ddi_dma_attr_t *,
            int (*)(caddr_t), caddr_t, ddi_dma_handle_t *);

        funcp = DEVI(dip)->devi_ops->devo_bus_ops->bus_dma_allochdl;
        return ((*funcp)(dip, dip, attr, waitfp, arg, handlep));
}

int
fc_ddi_dma_buf_bind_handle(ddi_dma_handle_t handle, struct buf *bp,
    uint_t flags, int (*waitfp)(caddr_t), caddr_t arg,
    ddi_dma_cookie_t *cookiep, uint_t *ccountp)
{
        struct ddi_dma_req dmareq;
        ddi_dma_impl_t *hp;
        dev_info_t *dip;
        int (*funcp)(dev_info_t *, dev_info_t *, ddi_dma_handle_t,
            struct ddi_dma_req *, ddi_dma_cookie_t *, uint_t *);

        hp = (ddi_dma_impl_t *)handle;
        dip = hp->dmai_rdip;

        dmareq.dmar_flags = flags;
        dmareq.dmar_fp = waitfp;
        dmareq.dmar_arg = arg;
        dmareq.dmar_object.dmao_size = (uint_t)bp->b_bcount;

        if ((bp->b_flags & (B_PAGEIO|B_REMAPPED)) == B_PAGEIO) {
                dmareq.dmar_object.dmao_type = DMA_OTYP_PAGES;
                dmareq.dmar_object.dmao_obj.pp_obj.pp_pp = bp->b_pages;
                dmareq.dmar_object.dmao_obj.pp_obj.pp_offset =
                    (uint_t)(((uintptr_t)bp->b_un.b_addr) & MMU_PAGEOFFSET);
        } else {
                dmareq.dmar_object.dmao_obj.virt_obj.v_addr = bp->b_un.b_addr;
                if ((bp->b_flags & (B_SHADOW|B_REMAPPED)) == B_SHADOW) {
                        dmareq.dmar_object.dmao_obj.virt_obj.v_priv =
                                                        bp->b_shadow;
                        dmareq.dmar_object.dmao_type = DMA_OTYP_BUFVADDR;
                } else {
                        dmareq.dmar_object.dmao_type =
                                (bp->b_flags & (B_PHYS | B_REMAPPED))?
                                DMA_OTYP_BUFVADDR : DMA_OTYP_VADDR;
                        dmareq.dmar_object.dmao_obj.virt_obj.v_priv = NULL;
                }

                /*
                 * If the buffer has no proc pointer, or the proc
                 * struct has the kernel address space, or the buffer has
                 * been marked B_REMAPPED (meaning that it is now
                 * mapped into the kernel's address space), then
                 * the address space is kas (kernel address space).
                 */
                if (bp->b_proc == NULL || bp->b_proc->p_as == &kas ||
                    (bp->b_flags & B_REMAPPED) != 0) {
                        dmareq.dmar_object.dmao_obj.virt_obj.v_as = 0;
                } else {
                        dmareq.dmar_object.dmao_obj.virt_obj.v_as =
                            bp->b_proc->p_as;
                }
        }

        funcp = DEVI(dip)->devi_ops->devo_bus_ops->bus_dma_bindhdl;
        return ((*funcp)(dip, dip, handle, &dmareq, cookiep, ccountp));
}

int
fc_ddi_dma_unbind_handle(ddi_dma_handle_t handle)
{
        int (*funcp)(dev_info_t *, dev_info_t *, ddi_dma_handle_t);
        ddi_dma_impl_t *hp;
        dev_info_t *dip;

        hp = (ddi_dma_impl_t *)handle;
        dip = hp->dmai_rdip;
        funcp = DEVI(dip)->devi_ops->devo_bus_ops->bus_dma_unbindhdl;
        return ((*funcp)(dip, dip, handle));
}

void
fc_ddi_dma_free_handle(ddi_dma_handle_t *handlep)
{
        int (*funcp)(dev_info_t *, dev_info_t *, ddi_dma_handle_t);
        ddi_dma_impl_t *hp;
        dev_info_t *dip;

        hp = (ddi_dma_impl_t *)*handlep;
        dip = hp->dmai_rdip;
        funcp = DEVI(dip)->devi_ops->devo_bus_ops->bus_dma_freehdl;
        (void) (*funcp)(dip, dip, *handlep);
}

int
fc_ddi_dma_sync(ddi_dma_handle_t h, off_t o, size_t l, uint_t whom)
{
        ddi_dma_impl_t *hp = (ddi_dma_impl_t *)h;
        dev_info_t *dip;
        int (*funcp)(dev_info_t *, dev_info_t *, ddi_dma_handle_t, off_t,
                size_t, uint_t);

        /*
         * the DMA nexus driver will set DMP_NOSYNC if the
         * platform does not require any sync operation. For
         * example if the memory is uncached or consistent
         * and without any I/O write buffers involved.
         */
        if ((hp->dmai_rflags & DMP_NOSYNC) == DMP_NOSYNC)
                return (DDI_SUCCESS);

        dip = hp->dmai_rdip;
        funcp = DEVI(dip)->devi_ops->devo_bus_ops->bus_dma_flush;
        return ((*funcp)(dip, dip, h, o, l, whom));
}

/*
 * Create untyped properties, just like 1275 properties.
 * XXX: Assumes property encoding is the natural byte order.
 */
int
fc_ndi_prop_update(dev_t match_dev, dev_info_t *dip,
    char *name, uchar_t *data, uint_t nelements)
{
        return (ddi_prop_update_common(match_dev, dip,
            DDI_PROP_HW_DEF | DDI_PROP_TYPE_ANY,
            name, data, nelements, ddi_prop_fm_encode_bytes));
}