aliguori | 244ab90 | 2009-02-05 21:23:50 +0000 | [diff] [blame] | 1 | /* |
| 2 | * DMA helper functions |
| 3 | * |
| 4 | * Copyright (c) 2009 Red Hat |
| 5 | * |
| 6 | * This work is licensed under the terms of the GNU General Public License |
| 7 | * (GNU GPL), version 2 or later. |
| 8 | */ |
| 9 | |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 10 | #include "sysemu/block-backend.h" |
Paolo Bonzini | 9c17d61 | 2012-12-17 18:20:04 +0100 | [diff] [blame] | 11 | #include "sysemu/dma.h" |
Kevin Wolf | c57c465 | 2011-11-24 06:15:28 -0500 | [diff] [blame] | 12 | #include "trace.h" |
Paolo Bonzini | 1de7afc | 2012-12-17 18:20:00 +0100 | [diff] [blame] | 13 | #include "qemu/range.h" |
| 14 | #include "qemu/thread.h" |
Alex Bligh | 6a1751b | 2013-08-21 16:02:47 +0100 | [diff] [blame] | 15 | #include "qemu/main-loop.h" |
aliguori | 244ab90 | 2009-02-05 21:23:50 +0000 | [diff] [blame] | 16 | |
David Gibson | e5332e6 | 2012-06-27 14:50:43 +1000 | [diff] [blame] | 17 | /* #define DEBUG_IOMMU */ |
| 18 | |
Paolo Bonzini | df32fd1 | 2013-04-10 18:15:49 +0200 | [diff] [blame] | 19 | int dma_memory_set(AddressSpace *as, dma_addr_t addr, uint8_t c, dma_addr_t len) |
David Gibson | d86a77f | 2012-06-27 14:50:38 +1000 | [diff] [blame] | 20 | { |
Paolo Bonzini | df32fd1 | 2013-04-10 18:15:49 +0200 | [diff] [blame] | 21 | dma_barrier(as, DMA_DIRECTION_FROM_DEVICE); |
Paolo Bonzini | 24addbc | 2013-04-10 17:49:04 +0200 | [diff] [blame] | 22 | |
David Gibson | d86a77f | 2012-06-27 14:50:38 +1000 | [diff] [blame] | 23 | #define FILLBUF_SIZE 512 |
| 24 | uint8_t fillbuf[FILLBUF_SIZE]; |
| 25 | int l; |
Paolo Bonzini | 24addbc | 2013-04-10 17:49:04 +0200 | [diff] [blame] | 26 | bool error = false; |
David Gibson | d86a77f | 2012-06-27 14:50:38 +1000 | [diff] [blame] | 27 | |
| 28 | memset(fillbuf, c, FILLBUF_SIZE); |
| 29 | while (len > 0) { |
| 30 | l = len < FILLBUF_SIZE ? len : FILLBUF_SIZE; |
Paolo Bonzini | 24addbc | 2013-04-10 17:49:04 +0200 | [diff] [blame] | 31 | error |= address_space_rw(as, addr, fillbuf, l, true); |
Benjamin Herrenschmidt | bc9b78d | 2012-08-14 17:41:47 +1000 | [diff] [blame] | 32 | len -= l; |
| 33 | addr += l; |
David Gibson | d86a77f | 2012-06-27 14:50:38 +1000 | [diff] [blame] | 34 | } |
David Gibson | e5332e6 | 2012-06-27 14:50:43 +1000 | [diff] [blame] | 35 | |
Paolo Bonzini | 24addbc | 2013-04-10 17:49:04 +0200 | [diff] [blame] | 36 | return error; |
David Gibson | d86a77f | 2012-06-27 14:50:38 +1000 | [diff] [blame] | 37 | } |
| 38 | |
Paolo Bonzini | f487b67 | 2013-06-03 14:17:19 +0200 | [diff] [blame] | 39 | void qemu_sglist_init(QEMUSGList *qsg, DeviceState *dev, int alloc_hint, |
| 40 | AddressSpace *as) |
aliguori | 244ab90 | 2009-02-05 21:23:50 +0000 | [diff] [blame] | 41 | { |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 42 | qsg->sg = g_malloc(alloc_hint * sizeof(ScatterGatherEntry)); |
aliguori | 244ab90 | 2009-02-05 21:23:50 +0000 | [diff] [blame] | 43 | qsg->nsg = 0; |
| 44 | qsg->nalloc = alloc_hint; |
| 45 | qsg->size = 0; |
Paolo Bonzini | df32fd1 | 2013-04-10 18:15:49 +0200 | [diff] [blame] | 46 | qsg->as = as; |
Paolo Bonzini | f487b67 | 2013-06-03 14:17:19 +0200 | [diff] [blame] | 47 | qsg->dev = dev; |
| 48 | object_ref(OBJECT(dev)); |
aliguori | 244ab90 | 2009-02-05 21:23:50 +0000 | [diff] [blame] | 49 | } |
| 50 | |
David Gibson | d323118 | 2011-10-31 17:06:46 +1100 | [diff] [blame] | 51 | void qemu_sglist_add(QEMUSGList *qsg, dma_addr_t base, dma_addr_t len) |
aliguori | 244ab90 | 2009-02-05 21:23:50 +0000 | [diff] [blame] | 52 | { |
| 53 | if (qsg->nsg == qsg->nalloc) { |
| 54 | qsg->nalloc = 2 * qsg->nalloc + 1; |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 55 | qsg->sg = g_realloc(qsg->sg, qsg->nalloc * sizeof(ScatterGatherEntry)); |
aliguori | 244ab90 | 2009-02-05 21:23:50 +0000 | [diff] [blame] | 56 | } |
| 57 | qsg->sg[qsg->nsg].base = base; |
| 58 | qsg->sg[qsg->nsg].len = len; |
| 59 | qsg->size += len; |
| 60 | ++qsg->nsg; |
| 61 | } |
| 62 | |
| 63 | void qemu_sglist_destroy(QEMUSGList *qsg) |
| 64 | { |
Paolo Bonzini | f487b67 | 2013-06-03 14:17:19 +0200 | [diff] [blame] | 65 | object_unref(OBJECT(qsg->dev)); |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 66 | g_free(qsg->sg); |
Jason Baron | ea8d82a | 2012-08-03 15:57:10 -0400 | [diff] [blame] | 67 | memset(qsg, 0, sizeof(*qsg)); |
aliguori | 244ab90 | 2009-02-05 21:23:50 +0000 | [diff] [blame] | 68 | } |
| 69 | |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 70 | typedef struct { |
Markus Armbruster | 7c84b1b | 2014-10-07 13:59:14 +0200 | [diff] [blame] | 71 | BlockAIOCB common; |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 72 | BlockBackend *blk; |
Markus Armbruster | 7c84b1b | 2014-10-07 13:59:14 +0200 | [diff] [blame] | 73 | BlockAIOCB *acb; |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 74 | QEMUSGList *sg; |
| 75 | uint64_t sector_num; |
David Gibson | 43cf8ae | 2012-03-27 13:42:23 +1100 | [diff] [blame] | 76 | DMADirection dir; |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 77 | int sg_cur_index; |
David Gibson | d323118 | 2011-10-31 17:06:46 +1100 | [diff] [blame] | 78 | dma_addr_t sg_cur_byte; |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 79 | QEMUIOVector iov; |
| 80 | QEMUBH *bh; |
Christoph Hellwig | cb144cc | 2011-05-19 10:57:59 +0200 | [diff] [blame] | 81 | DMAIOFunc *io_func; |
aliguori | 37b7842 | 2009-03-20 18:26:16 +0000 | [diff] [blame] | 82 | } DMAAIOCB; |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 83 | |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 84 | static void dma_blk_cb(void *opaque, int ret); |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 85 | |
| 86 | static void reschedule_dma(void *opaque) |
| 87 | { |
aliguori | 37b7842 | 2009-03-20 18:26:16 +0000 | [diff] [blame] | 88 | DMAAIOCB *dbs = (DMAAIOCB *)opaque; |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 89 | |
| 90 | qemu_bh_delete(dbs->bh); |
| 91 | dbs->bh = NULL; |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 92 | dma_blk_cb(dbs, 0); |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 93 | } |
| 94 | |
| 95 | static void continue_after_map_failure(void *opaque) |
| 96 | { |
aliguori | 37b7842 | 2009-03-20 18:26:16 +0000 | [diff] [blame] | 97 | DMAAIOCB *dbs = (DMAAIOCB *)opaque; |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 98 | |
| 99 | dbs->bh = qemu_bh_new(reschedule_dma, dbs); |
| 100 | qemu_bh_schedule(dbs->bh); |
| 101 | } |
| 102 | |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 103 | static void dma_blk_unmap(DMAAIOCB *dbs) |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 104 | { |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 105 | int i; |
| 106 | |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 107 | for (i = 0; i < dbs->iov.niov; ++i) { |
Paolo Bonzini | df32fd1 | 2013-04-10 18:15:49 +0200 | [diff] [blame] | 108 | dma_memory_unmap(dbs->sg->as, dbs->iov.iov[i].iov_base, |
David Gibson | c65bcef | 2012-06-27 14:50:40 +1000 | [diff] [blame] | 109 | dbs->iov.iov[i].iov_len, dbs->dir, |
| 110 | dbs->iov.iov[i].iov_len); |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 111 | } |
Paolo Bonzini | c3adb5b | 2011-09-16 16:40:02 +0200 | [diff] [blame] | 112 | qemu_iovec_reset(&dbs->iov); |
| 113 | } |
| 114 | |
| 115 | static void dma_complete(DMAAIOCB *dbs, int ret) |
| 116 | { |
Kevin Wolf | c57c465 | 2011-11-24 06:15:28 -0500 | [diff] [blame] | 117 | trace_dma_complete(dbs, ret, dbs->common.cb); |
| 118 | |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 119 | dma_blk_unmap(dbs); |
Paolo Bonzini | c3adb5b | 2011-09-16 16:40:02 +0200 | [diff] [blame] | 120 | if (dbs->common.cb) { |
| 121 | dbs->common.cb(dbs->common.opaque, ret); |
| 122 | } |
| 123 | qemu_iovec_destroy(&dbs->iov); |
| 124 | if (dbs->bh) { |
| 125 | qemu_bh_delete(dbs->bh); |
| 126 | dbs->bh = NULL; |
| 127 | } |
Fam Zheng | 8007429 | 2014-09-11 13:41:28 +0800 | [diff] [blame] | 128 | qemu_aio_unref(dbs); |
aliguori | 7403b14 | 2009-03-28 16:11:25 +0000 | [diff] [blame] | 129 | } |
| 130 | |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 131 | static void dma_blk_cb(void *opaque, int ret) |
aliguori | 7403b14 | 2009-03-28 16:11:25 +0000 | [diff] [blame] | 132 | { |
| 133 | DMAAIOCB *dbs = (DMAAIOCB *)opaque; |
David Gibson | c65bcef | 2012-06-27 14:50:40 +1000 | [diff] [blame] | 134 | dma_addr_t cur_addr, cur_len; |
aliguori | 7403b14 | 2009-03-28 16:11:25 +0000 | [diff] [blame] | 135 | void *mem; |
| 136 | |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 137 | trace_dma_blk_cb(dbs, ret); |
Kevin Wolf | c57c465 | 2011-11-24 06:15:28 -0500 | [diff] [blame] | 138 | |
aliguori | 7403b14 | 2009-03-28 16:11:25 +0000 | [diff] [blame] | 139 | dbs->acb = NULL; |
| 140 | dbs->sector_num += dbs->iov.size / 512; |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 141 | |
| 142 | if (dbs->sg_cur_index == dbs->sg->nsg || ret < 0) { |
Paolo Bonzini | c3adb5b | 2011-09-16 16:40:02 +0200 | [diff] [blame] | 143 | dma_complete(dbs, ret); |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 144 | return; |
| 145 | } |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 146 | dma_blk_unmap(dbs); |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 147 | |
| 148 | while (dbs->sg_cur_index < dbs->sg->nsg) { |
| 149 | cur_addr = dbs->sg->sg[dbs->sg_cur_index].base + dbs->sg_cur_byte; |
| 150 | cur_len = dbs->sg->sg[dbs->sg_cur_index].len - dbs->sg_cur_byte; |
Paolo Bonzini | df32fd1 | 2013-04-10 18:15:49 +0200 | [diff] [blame] | 151 | mem = dma_memory_map(dbs->sg->as, cur_addr, &cur_len, dbs->dir); |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 152 | if (!mem) |
| 153 | break; |
| 154 | qemu_iovec_add(&dbs->iov, mem, cur_len); |
| 155 | dbs->sg_cur_byte += cur_len; |
| 156 | if (dbs->sg_cur_byte == dbs->sg->sg[dbs->sg_cur_index].len) { |
| 157 | dbs->sg_cur_byte = 0; |
| 158 | ++dbs->sg_cur_index; |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | if (dbs->iov.size == 0) { |
Kevin Wolf | c57c465 | 2011-11-24 06:15:28 -0500 | [diff] [blame] | 163 | trace_dma_map_wait(dbs); |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 164 | cpu_register_map_client(dbs, continue_after_map_failure); |
| 165 | return; |
| 166 | } |
| 167 | |
Kevin Wolf | 58f423f | 2014-07-09 19:17:30 +0200 | [diff] [blame] | 168 | if (dbs->iov.size & ~BDRV_SECTOR_MASK) { |
| 169 | qemu_iovec_discard_back(&dbs->iov, dbs->iov.size & ~BDRV_SECTOR_MASK); |
| 170 | } |
| 171 | |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 172 | dbs->acb = dbs->io_func(dbs->blk, dbs->sector_num, &dbs->iov, |
| 173 | dbs->iov.size / 512, dma_blk_cb, dbs); |
Paolo Bonzini | 6bee44e | 2011-11-14 17:50:52 +0100 | [diff] [blame] | 174 | assert(dbs->acb); |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 175 | } |
| 176 | |
Markus Armbruster | 7c84b1b | 2014-10-07 13:59:14 +0200 | [diff] [blame] | 177 | static void dma_aio_cancel(BlockAIOCB *acb) |
Christoph Hellwig | c16b5a2 | 2009-05-25 12:37:32 +0200 | [diff] [blame] | 178 | { |
| 179 | DMAAIOCB *dbs = container_of(acb, DMAAIOCB, common); |
| 180 | |
Kevin Wolf | c57c465 | 2011-11-24 06:15:28 -0500 | [diff] [blame] | 181 | trace_dma_aio_cancel(dbs); |
| 182 | |
Christoph Hellwig | c16b5a2 | 2009-05-25 12:37:32 +0200 | [diff] [blame] | 183 | if (dbs->acb) { |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 184 | blk_aio_cancel_async(dbs->acb); |
Christoph Hellwig | c16b5a2 | 2009-05-25 12:37:32 +0200 | [diff] [blame] | 185 | } |
| 186 | } |
| 187 | |
Fam Zheng | 9bb9da4 | 2014-09-11 13:41:14 +0800 | [diff] [blame] | 188 | |
Stefan Hajnoczi | d7331be | 2012-10-31 16:34:37 +0100 | [diff] [blame] | 189 | static const AIOCBInfo dma_aiocb_info = { |
Christoph Hellwig | c16b5a2 | 2009-05-25 12:37:32 +0200 | [diff] [blame] | 190 | .aiocb_size = sizeof(DMAAIOCB), |
Fam Zheng | 9bb9da4 | 2014-09-11 13:41:14 +0800 | [diff] [blame] | 191 | .cancel_async = dma_aio_cancel, |
Christoph Hellwig | c16b5a2 | 2009-05-25 12:37:32 +0200 | [diff] [blame] | 192 | }; |
| 193 | |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 194 | BlockAIOCB *dma_blk_io( |
| 195 | BlockBackend *blk, QEMUSGList *sg, uint64_t sector_num, |
Markus Armbruster | 097310b | 2014-10-07 13:59:15 +0200 | [diff] [blame] | 196 | DMAIOFunc *io_func, BlockCompletionFunc *cb, |
David Gibson | 43cf8ae | 2012-03-27 13:42:23 +1100 | [diff] [blame] | 197 | void *opaque, DMADirection dir) |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 198 | { |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 199 | DMAAIOCB *dbs = blk_aio_get(&dma_aiocb_info, blk, cb, opaque); |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 200 | |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 201 | trace_dma_blk_io(dbs, blk, sector_num, (dir == DMA_DIRECTION_TO_DEVICE)); |
Kevin Wolf | c57c465 | 2011-11-24 06:15:28 -0500 | [diff] [blame] | 202 | |
aliguori | 37b7842 | 2009-03-20 18:26:16 +0000 | [diff] [blame] | 203 | dbs->acb = NULL; |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 204 | dbs->blk = blk; |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 205 | dbs->sg = sg; |
| 206 | dbs->sector_num = sector_num; |
| 207 | dbs->sg_cur_index = 0; |
| 208 | dbs->sg_cur_byte = 0; |
David Gibson | 43cf8ae | 2012-03-27 13:42:23 +1100 | [diff] [blame] | 209 | dbs->dir = dir; |
Christoph Hellwig | cb144cc | 2011-05-19 10:57:59 +0200 | [diff] [blame] | 210 | dbs->io_func = io_func; |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 211 | dbs->bh = NULL; |
| 212 | qemu_iovec_init(&dbs->iov, sg->nsg); |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 213 | dma_blk_cb(dbs, 0); |
aliguori | 37b7842 | 2009-03-20 18:26:16 +0000 | [diff] [blame] | 214 | return &dbs->common; |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 215 | } |
| 216 | |
| 217 | |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 218 | BlockAIOCB *dma_blk_read(BlockBackend *blk, |
| 219 | QEMUSGList *sg, uint64_t sector, |
| 220 | void (*cb)(void *opaque, int ret), void *opaque) |
| 221 | { |
| 222 | return dma_blk_io(blk, sg, sector, blk_aio_readv, cb, opaque, |
| 223 | DMA_DIRECTION_FROM_DEVICE); |
| 224 | } |
| 225 | |
| 226 | BlockAIOCB *dma_blk_write(BlockBackend *blk, |
Markus Armbruster | 7c84b1b | 2014-10-07 13:59:14 +0200 | [diff] [blame] | 227 | QEMUSGList *sg, uint64_t sector, |
| 228 | void (*cb)(void *opaque, int ret), void *opaque) |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 229 | { |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 230 | return dma_blk_io(blk, sg, sector, blk_aio_writev, cb, opaque, |
| 231 | DMA_DIRECTION_TO_DEVICE); |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 232 | } |
Paolo Bonzini | 8171ee3 | 2011-07-06 08:02:14 +0200 | [diff] [blame] | 233 | |
| 234 | |
David Gibson | c65bcef | 2012-06-27 14:50:40 +1000 | [diff] [blame] | 235 | static uint64_t dma_buf_rw(uint8_t *ptr, int32_t len, QEMUSGList *sg, |
| 236 | DMADirection dir) |
Paolo Bonzini | 8171ee3 | 2011-07-06 08:02:14 +0200 | [diff] [blame] | 237 | { |
| 238 | uint64_t resid; |
| 239 | int sg_cur_index; |
| 240 | |
| 241 | resid = sg->size; |
| 242 | sg_cur_index = 0; |
| 243 | len = MIN(len, resid); |
| 244 | while (len > 0) { |
| 245 | ScatterGatherEntry entry = sg->sg[sg_cur_index++]; |
| 246 | int32_t xfer = MIN(len, entry.len); |
Paolo Bonzini | df32fd1 | 2013-04-10 18:15:49 +0200 | [diff] [blame] | 247 | dma_memory_rw(sg->as, entry.base, ptr, xfer, dir); |
Paolo Bonzini | 8171ee3 | 2011-07-06 08:02:14 +0200 | [diff] [blame] | 248 | ptr += xfer; |
| 249 | len -= xfer; |
| 250 | resid -= xfer; |
| 251 | } |
| 252 | |
| 253 | return resid; |
| 254 | } |
| 255 | |
| 256 | uint64_t dma_buf_read(uint8_t *ptr, int32_t len, QEMUSGList *sg) |
| 257 | { |
David Gibson | c65bcef | 2012-06-27 14:50:40 +1000 | [diff] [blame] | 258 | return dma_buf_rw(ptr, len, sg, DMA_DIRECTION_FROM_DEVICE); |
Paolo Bonzini | 8171ee3 | 2011-07-06 08:02:14 +0200 | [diff] [blame] | 259 | } |
| 260 | |
| 261 | uint64_t dma_buf_write(uint8_t *ptr, int32_t len, QEMUSGList *sg) |
| 262 | { |
David Gibson | c65bcef | 2012-06-27 14:50:40 +1000 | [diff] [blame] | 263 | return dma_buf_rw(ptr, len, sg, DMA_DIRECTION_TO_DEVICE); |
Paolo Bonzini | 8171ee3 | 2011-07-06 08:02:14 +0200 | [diff] [blame] | 264 | } |
Paolo Bonzini | 84a6935 | 2011-09-05 14:20:29 +0200 | [diff] [blame] | 265 | |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 266 | void dma_acct_start(BlockBackend *blk, BlockAcctCookie *cookie, |
Paolo Bonzini | 84a6935 | 2011-09-05 14:20:29 +0200 | [diff] [blame] | 267 | QEMUSGList *sg, enum BlockAcctType type) |
| 268 | { |
Markus Armbruster | 4be7463 | 2014-10-07 13:59:18 +0200 | [diff] [blame] | 269 | block_acct_start(blk_get_stats(blk), cookie, sg->size, type); |
Paolo Bonzini | 84a6935 | 2011-09-05 14:20:29 +0200 | [diff] [blame] | 270 | } |