X-Git-Url: https://git.proxmox.com/?p=mirror_qemu.git;a=blobdiff_plain;f=dma-helpers.c;h=2d7e02d35e57613b3921e5621829f3ba1a736bdc;hp=499b52bc5a35293d89a81004334c1dfa29b09e2c;hb=HEAD;hpb=0a9934eef166836c8100fce72f7f837cb8b2ed2b

diff --git a/dma-helpers.c b/dma-helpers.c
deleted file mode 100644
index 499b52bc5a..0000000000
--- a/dma-helpers.c
+++ /dev/null
@@ -1,281 +0,0 @@
-/*
- * DMA helper functions
- *
- * Copyright (c) 2009 Red Hat
- *
- * This work is licensed under the terms of the GNU General Public License
- * (GNU GPL), version 2 or later.
- */
-
-#include "sysemu/dma.h"
-#include "trace.h"
-#include "qemu/range.h"
-#include "qemu/thread.h"
-#include "qemu/main-loop.h"
-
-/* #define DEBUG_IOMMU */
-
-int dma_memory_set(AddressSpace *as, dma_addr_t addr, uint8_t c, dma_addr_t len)
-{
-    dma_barrier(as, DMA_DIRECTION_FROM_DEVICE);
-
-#define FILLBUF_SIZE 512
-    uint8_t fillbuf[FILLBUF_SIZE];
-    int l;
-    bool error = false;
-
-    memset(fillbuf, c, FILLBUF_SIZE);
-    while (len > 0) {
-        l = len < FILLBUF_SIZE ? len : FILLBUF_SIZE;
-        error |= address_space_rw(as, addr, fillbuf, l, true);
-        len -= l;
-        addr += l;
-    }
-
-    return error;
-}
-
-void qemu_sglist_init(QEMUSGList *qsg, DeviceState *dev, int alloc_hint,
-                      AddressSpace *as)
-{
-    qsg->sg = g_malloc(alloc_hint * sizeof(ScatterGatherEntry));
-    qsg->nsg = 0;
-    qsg->nalloc = alloc_hint;
-    qsg->size = 0;
-    qsg->as = as;
-    qsg->dev = dev;
-    object_ref(OBJECT(dev));
-}
-
-void qemu_sglist_add(QEMUSGList *qsg, dma_addr_t base, dma_addr_t len)
-{
-    if (qsg->nsg == qsg->nalloc) {
-        qsg->nalloc = 2 * qsg->nalloc + 1;
-        qsg->sg = g_realloc(qsg->sg, qsg->nalloc * sizeof(ScatterGatherEntry));
-    }
-    qsg->sg[qsg->nsg].base = base;
-    qsg->sg[qsg->nsg].len = len;
-    qsg->size += len;
-    ++qsg->nsg;
-}
-
-void qemu_sglist_destroy(QEMUSGList *qsg)
-{
-    object_unref(OBJECT(qsg->dev));
-    g_free(qsg->sg);
-    memset(qsg, 0, sizeof(*qsg));
-}
-
-typedef struct {
-    BlockDriverAIOCB common;
-    BlockDriverState *bs;
-    BlockDriverAIOCB *acb;
-    QEMUSGList *sg;
-    uint64_t sector_num;
-    DMADirection dir;
-    bool in_cancel;
-    int sg_cur_index;
-    dma_addr_t sg_cur_byte;
-    QEMUIOVector iov;
-    QEMUBH *bh;
-    DMAIOFunc *io_func;
-} DMAAIOCB;
-
-static void dma_bdrv_cb(void *opaque, int ret);
-
-static void reschedule_dma(void *opaque)
-{
-    DMAAIOCB *dbs = (DMAAIOCB *)opaque;
-
-    qemu_bh_delete(dbs->bh);
-    dbs->bh = NULL;
-    dma_bdrv_cb(dbs, 0);
-}
-
-static void continue_after_map_failure(void *opaque)
-{
-    DMAAIOCB *dbs = (DMAAIOCB *)opaque;
-
-    dbs->bh = qemu_bh_new(reschedule_dma, dbs);
-    qemu_bh_schedule(dbs->bh);
-}
-
-static void dma_bdrv_unmap(DMAAIOCB *dbs)
-{
-    int i;
-
-    for (i = 0; i < dbs->iov.niov; ++i) {
-        dma_memory_unmap(dbs->sg->as, dbs->iov.iov[i].iov_base,
-                         dbs->iov.iov[i].iov_len, dbs->dir,
-                         dbs->iov.iov[i].iov_len);
-    }
-    qemu_iovec_reset(&dbs->iov);
-}
-
-static void dma_complete(DMAAIOCB *dbs, int ret)
-{
-    trace_dma_complete(dbs, ret, dbs->common.cb);
-
-    dma_bdrv_unmap(dbs);
-    if (dbs->common.cb) {
-        dbs->common.cb(dbs->common.opaque, ret);
-    }
-    qemu_iovec_destroy(&dbs->iov);
-    if (dbs->bh) {
-        qemu_bh_delete(dbs->bh);
-        dbs->bh = NULL;
-    }
-    if (!dbs->in_cancel) {
-        /* Requests may complete while dma_aio_cancel is in progress.  In
-         * this case, the AIOCB should not be released because it is still
-         * referenced by dma_aio_cancel.  */
-        qemu_aio_release(dbs);
-    }
-}
-
-static void dma_bdrv_cb(void *opaque, int ret)
-{
-    DMAAIOCB *dbs = (DMAAIOCB *)opaque;
-    dma_addr_t cur_addr, cur_len;
-    void *mem;
-
-    trace_dma_bdrv_cb(dbs, ret);
-
-    dbs->acb = NULL;
-    dbs->sector_num += dbs->iov.size / 512;
-
-    if (dbs->sg_cur_index == dbs->sg->nsg || ret < 0) {
-        dma_complete(dbs, ret);
-        return;
-    }
-    dma_bdrv_unmap(dbs);
-
-    while (dbs->sg_cur_index < dbs->sg->nsg) {
-        cur_addr = dbs->sg->sg[dbs->sg_cur_index].base + dbs->sg_cur_byte;
-        cur_len = dbs->sg->sg[dbs->sg_cur_index].len - dbs->sg_cur_byte;
-        mem = dma_memory_map(dbs->sg->as, cur_addr, &cur_len, dbs->dir);
-        if (!mem)
-            break;
-        qemu_iovec_add(&dbs->iov, mem, cur_len);
-        dbs->sg_cur_byte += cur_len;
-        if (dbs->sg_cur_byte == dbs->sg->sg[dbs->sg_cur_index].len) {
-            dbs->sg_cur_byte = 0;
-            ++dbs->sg_cur_index;
-        }
-    }
-
-    if (dbs->iov.size == 0) {
-        trace_dma_map_wait(dbs);
-        cpu_register_map_client(dbs, continue_after_map_failure);
-        return;
-    }
-
-    if (dbs->iov.size & ~BDRV_SECTOR_MASK) {
-        qemu_iovec_discard_back(&dbs->iov, dbs->iov.size & ~BDRV_SECTOR_MASK);
-    }
-
-    dbs->acb = dbs->io_func(dbs->bs, dbs->sector_num, &dbs->iov,
-                            dbs->iov.size / 512, dma_bdrv_cb, dbs);
-    assert(dbs->acb);
-}
-
-static void dma_aio_cancel(BlockDriverAIOCB *acb)
-{
-    DMAAIOCB *dbs = container_of(acb, DMAAIOCB, common);
-
-    trace_dma_aio_cancel(dbs);
-
-    if (dbs->acb) {
-        BlockDriverAIOCB *acb = dbs->acb;
-        dbs->acb = NULL;
-        dbs->in_cancel = true;
-        bdrv_aio_cancel(acb);
-        dbs->in_cancel = false;
-    }
-    dbs->common.cb = NULL;
-    dma_complete(dbs, 0);
-}
-
-static const AIOCBInfo dma_aiocb_info = {
-    .aiocb_size         = sizeof(DMAAIOCB),
-    .cancel             = dma_aio_cancel,
-};
-
-BlockDriverAIOCB *dma_bdrv_io(
-    BlockDriverState *bs, QEMUSGList *sg, uint64_t sector_num,
-    DMAIOFunc *io_func, BlockDriverCompletionFunc *cb,
-    void *opaque, DMADirection dir)
-{
-    DMAAIOCB *dbs = qemu_aio_get(&dma_aiocb_info, bs, cb, opaque);
-
-    trace_dma_bdrv_io(dbs, bs, sector_num, (dir == DMA_DIRECTION_TO_DEVICE));
-
-    dbs->acb = NULL;
-    dbs->bs = bs;
-    dbs->sg = sg;
-    dbs->sector_num = sector_num;
-    dbs->sg_cur_index = 0;
-    dbs->sg_cur_byte = 0;
-    dbs->dir = dir;
-    dbs->in_cancel = false;
-    dbs->io_func = io_func;
-    dbs->bh = NULL;
-    qemu_iovec_init(&dbs->iov, sg->nsg);
-    dma_bdrv_cb(dbs, 0);
-    return &dbs->common;
-}
-
-
-BlockDriverAIOCB *dma_bdrv_read(BlockDriverState *bs,
-                                QEMUSGList *sg, uint64_t sector,
-                                void (*cb)(void *opaque, int ret), void *opaque)
-{
-    return dma_bdrv_io(bs, sg, sector, bdrv_aio_readv, cb, opaque,
-                       DMA_DIRECTION_FROM_DEVICE);
-}
-
-BlockDriverAIOCB *dma_bdrv_write(BlockDriverState *bs,
-                                 QEMUSGList *sg, uint64_t sector,
-                                 void (*cb)(void *opaque, int ret), void *opaque)
-{
-    return dma_bdrv_io(bs, sg, sector, bdrv_aio_writev, cb, opaque,
-                       DMA_DIRECTION_TO_DEVICE);
-}
-
-
-static uint64_t dma_buf_rw(uint8_t *ptr, int32_t len, QEMUSGList *sg,
-                           DMADirection dir)
-{
-    uint64_t resid;
-    int sg_cur_index;
-
-    resid = sg->size;
-    sg_cur_index = 0;
-    len = MIN(len, resid);
-    while (len > 0) {
-        ScatterGatherEntry entry = sg->sg[sg_cur_index++];
-        int32_t xfer = MIN(len, entry.len);
-        dma_memory_rw(sg->as, entry.base, ptr, xfer, dir);
-        ptr += xfer;
-        len -= xfer;
-        resid -= xfer;
-    }
-
-    return resid;
-}
-
-uint64_t dma_buf_read(uint8_t *ptr, int32_t len, QEMUSGList *sg)
-{
-    return dma_buf_rw(ptr, len, sg, DMA_DIRECTION_FROM_DEVICE);
-}
-
-uint64_t dma_buf_write(uint8_t *ptr, int32_t len, QEMUSGList *sg)
-{
-    return dma_buf_rw(ptr, len, sg, DMA_DIRECTION_TO_DEVICE);
-}
-
-void dma_acct_start(BlockDriverState *bs, BlockAcctCookie *cookie,
-                    QEMUSGList *sg, enum BlockAcctType type)
-{
-    bdrv_acct_start(bs, cookie, sg->size, type);
-}