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 | |
Paolo Bonzini | 9c17d61 | 2012-12-17 18:20:04 +0100 | [diff] [blame] | 10 | #include "sysemu/dma.h" |
Kevin Wolf | c57c465 | 2011-11-24 06:15:28 -0500 | [diff] [blame] | 11 | #include "trace.h" |
Paolo Bonzini | 1de7afc | 2012-12-17 18:20:00 +0100 | [diff] [blame] | 12 | #include "qemu/range.h" |
| 13 | #include "qemu/thread.h" |
Alex Bligh | 6a1751b | 2013-08-21 16:02:47 +0100 | [diff] [blame] | 14 | #include "qemu/main-loop.h" |
aliguori | 244ab90 | 2009-02-05 21:23:50 +0000 | [diff] [blame] | 15 | |
David Gibson | e5332e6 | 2012-06-27 14:50:43 +1000 | [diff] [blame] | 16 | /* #define DEBUG_IOMMU */ |
| 17 | |
Paolo Bonzini | df32fd1 | 2013-04-10 18:15:49 +0200 | [diff] [blame] | 18 | 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] | 19 | { |
Paolo Bonzini | df32fd1 | 2013-04-10 18:15:49 +0200 | [diff] [blame] | 20 | dma_barrier(as, DMA_DIRECTION_FROM_DEVICE); |
Paolo Bonzini | 24addbc | 2013-04-10 17:49:04 +0200 | [diff] [blame] | 21 | |
David Gibson | d86a77f | 2012-06-27 14:50:38 +1000 | [diff] [blame] | 22 | #define FILLBUF_SIZE 512 |
| 23 | uint8_t fillbuf[FILLBUF_SIZE]; |
| 24 | int l; |
Paolo Bonzini | 24addbc | 2013-04-10 17:49:04 +0200 | [diff] [blame] | 25 | bool error = false; |
David Gibson | d86a77f | 2012-06-27 14:50:38 +1000 | [diff] [blame] | 26 | |
| 27 | memset(fillbuf, c, FILLBUF_SIZE); |
| 28 | while (len > 0) { |
| 29 | l = len < FILLBUF_SIZE ? len : FILLBUF_SIZE; |
Paolo Bonzini | 24addbc | 2013-04-10 17:49:04 +0200 | [diff] [blame] | 30 | error |= address_space_rw(as, addr, fillbuf, l, true); |
Benjamin Herrenschmidt | bc9b78d | 2012-08-14 17:41:47 +1000 | [diff] [blame] | 31 | len -= l; |
| 32 | addr += l; |
David Gibson | d86a77f | 2012-06-27 14:50:38 +1000 | [diff] [blame] | 33 | } |
David Gibson | e5332e6 | 2012-06-27 14:50:43 +1000 | [diff] [blame] | 34 | |
Paolo Bonzini | 24addbc | 2013-04-10 17:49:04 +0200 | [diff] [blame] | 35 | return error; |
David Gibson | d86a77f | 2012-06-27 14:50:38 +1000 | [diff] [blame] | 36 | } |
| 37 | |
Paolo Bonzini | f487b67 | 2013-06-03 14:17:19 +0200 | [diff] [blame] | 38 | void qemu_sglist_init(QEMUSGList *qsg, DeviceState *dev, int alloc_hint, |
| 39 | AddressSpace *as) |
aliguori | 244ab90 | 2009-02-05 21:23:50 +0000 | [diff] [blame] | 40 | { |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 41 | qsg->sg = g_malloc(alloc_hint * sizeof(ScatterGatherEntry)); |
aliguori | 244ab90 | 2009-02-05 21:23:50 +0000 | [diff] [blame] | 42 | qsg->nsg = 0; |
| 43 | qsg->nalloc = alloc_hint; |
| 44 | qsg->size = 0; |
Paolo Bonzini | df32fd1 | 2013-04-10 18:15:49 +0200 | [diff] [blame] | 45 | qsg->as = as; |
Paolo Bonzini | f487b67 | 2013-06-03 14:17:19 +0200 | [diff] [blame] | 46 | qsg->dev = dev; |
| 47 | object_ref(OBJECT(dev)); |
aliguori | 244ab90 | 2009-02-05 21:23:50 +0000 | [diff] [blame] | 48 | } |
| 49 | |
David Gibson | d323118 | 2011-10-31 17:06:46 +1100 | [diff] [blame] | 50 | 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] | 51 | { |
| 52 | if (qsg->nsg == qsg->nalloc) { |
| 53 | qsg->nalloc = 2 * qsg->nalloc + 1; |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 54 | qsg->sg = g_realloc(qsg->sg, qsg->nalloc * sizeof(ScatterGatherEntry)); |
aliguori | 244ab90 | 2009-02-05 21:23:50 +0000 | [diff] [blame] | 55 | } |
| 56 | qsg->sg[qsg->nsg].base = base; |
| 57 | qsg->sg[qsg->nsg].len = len; |
| 58 | qsg->size += len; |
| 59 | ++qsg->nsg; |
| 60 | } |
| 61 | |
| 62 | void qemu_sglist_destroy(QEMUSGList *qsg) |
| 63 | { |
Paolo Bonzini | f487b67 | 2013-06-03 14:17:19 +0200 | [diff] [blame] | 64 | object_unref(OBJECT(qsg->dev)); |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 65 | g_free(qsg->sg); |
Jason Baron | ea8d82a | 2012-08-03 15:57:10 -0400 | [diff] [blame] | 66 | memset(qsg, 0, sizeof(*qsg)); |
aliguori | 244ab90 | 2009-02-05 21:23:50 +0000 | [diff] [blame] | 67 | } |
| 68 | |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 69 | typedef struct { |
aliguori | 37b7842 | 2009-03-20 18:26:16 +0000 | [diff] [blame] | 70 | BlockDriverAIOCB common; |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 71 | BlockDriverState *bs; |
| 72 | BlockDriverAIOCB *acb; |
| 73 | QEMUSGList *sg; |
| 74 | uint64_t sector_num; |
David Gibson | 43cf8ae | 2012-03-27 13:42:23 +1100 | [diff] [blame] | 75 | DMADirection dir; |
Paolo Bonzini | c3adb5b | 2011-09-16 16:40:02 +0200 | [diff] [blame] | 76 | bool in_cancel; |
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 | |
| 84 | static void dma_bdrv_cb(void *opaque, int ret); |
| 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; |
Paolo Bonzini | c3adb5b | 2011-09-16 16:40:02 +0200 | [diff] [blame] | 92 | dma_bdrv_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 | |
aliguori | 7403b14 | 2009-03-28 16:11:25 +0000 | [diff] [blame] | 103 | static void dma_bdrv_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 | |
Paolo Bonzini | c3adb5b | 2011-09-16 16:40:02 +0200 | [diff] [blame] | 119 | dma_bdrv_unmap(dbs); |
| 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 | } |
| 128 | if (!dbs->in_cancel) { |
| 129 | /* Requests may complete while dma_aio_cancel is in progress. In |
| 130 | * this case, the AIOCB should not be released because it is still |
| 131 | * referenced by dma_aio_cancel. */ |
| 132 | qemu_aio_release(dbs); |
| 133 | } |
aliguori | 7403b14 | 2009-03-28 16:11:25 +0000 | [diff] [blame] | 134 | } |
| 135 | |
blueswir1 | 856ae5c | 2009-04-07 17:57:09 +0000 | [diff] [blame] | 136 | static void dma_bdrv_cb(void *opaque, int ret) |
aliguori | 7403b14 | 2009-03-28 16:11:25 +0000 | [diff] [blame] | 137 | { |
| 138 | DMAAIOCB *dbs = (DMAAIOCB *)opaque; |
David Gibson | c65bcef | 2012-06-27 14:50:40 +1000 | [diff] [blame] | 139 | dma_addr_t cur_addr, cur_len; |
aliguori | 7403b14 | 2009-03-28 16:11:25 +0000 | [diff] [blame] | 140 | void *mem; |
| 141 | |
Kevin Wolf | c57c465 | 2011-11-24 06:15:28 -0500 | [diff] [blame] | 142 | trace_dma_bdrv_cb(dbs, ret); |
| 143 | |
aliguori | 7403b14 | 2009-03-28 16:11:25 +0000 | [diff] [blame] | 144 | dbs->acb = NULL; |
| 145 | dbs->sector_num += dbs->iov.size / 512; |
| 146 | dma_bdrv_unmap(dbs); |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 147 | |
| 148 | if (dbs->sg_cur_index == dbs->sg->nsg || ret < 0) { |
Paolo Bonzini | c3adb5b | 2011-09-16 16:40:02 +0200 | [diff] [blame] | 149 | dma_complete(dbs, ret); |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 150 | return; |
| 151 | } |
| 152 | |
| 153 | while (dbs->sg_cur_index < dbs->sg->nsg) { |
| 154 | cur_addr = dbs->sg->sg[dbs->sg_cur_index].base + dbs->sg_cur_byte; |
| 155 | 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] | 156 | mem = dma_memory_map(dbs->sg->as, cur_addr, &cur_len, dbs->dir); |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 157 | if (!mem) |
| 158 | break; |
| 159 | qemu_iovec_add(&dbs->iov, mem, cur_len); |
| 160 | dbs->sg_cur_byte += cur_len; |
| 161 | if (dbs->sg_cur_byte == dbs->sg->sg[dbs->sg_cur_index].len) { |
| 162 | dbs->sg_cur_byte = 0; |
| 163 | ++dbs->sg_cur_index; |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | if (dbs->iov.size == 0) { |
Kevin Wolf | c57c465 | 2011-11-24 06:15:28 -0500 | [diff] [blame] | 168 | trace_dma_map_wait(dbs); |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 169 | cpu_register_map_client(dbs, continue_after_map_failure); |
| 170 | return; |
| 171 | } |
| 172 | |
Christoph Hellwig | cb144cc | 2011-05-19 10:57:59 +0200 | [diff] [blame] | 173 | dbs->acb = dbs->io_func(dbs->bs, dbs->sector_num, &dbs->iov, |
| 174 | dbs->iov.size / 512, dma_bdrv_cb, dbs); |
Paolo Bonzini | 6bee44e | 2011-11-14 17:50:52 +0100 | [diff] [blame] | 175 | assert(dbs->acb); |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 176 | } |
| 177 | |
Christoph Hellwig | c16b5a2 | 2009-05-25 12:37:32 +0200 | [diff] [blame] | 178 | static void dma_aio_cancel(BlockDriverAIOCB *acb) |
| 179 | { |
| 180 | DMAAIOCB *dbs = container_of(acb, DMAAIOCB, common); |
| 181 | |
Kevin Wolf | c57c465 | 2011-11-24 06:15:28 -0500 | [diff] [blame] | 182 | trace_dma_aio_cancel(dbs); |
| 183 | |
Christoph Hellwig | c16b5a2 | 2009-05-25 12:37:32 +0200 | [diff] [blame] | 184 | if (dbs->acb) { |
Paolo Bonzini | c3adb5b | 2011-09-16 16:40:02 +0200 | [diff] [blame] | 185 | BlockDriverAIOCB *acb = dbs->acb; |
| 186 | dbs->acb = NULL; |
| 187 | dbs->in_cancel = true; |
| 188 | bdrv_aio_cancel(acb); |
| 189 | dbs->in_cancel = false; |
Christoph Hellwig | c16b5a2 | 2009-05-25 12:37:32 +0200 | [diff] [blame] | 190 | } |
Paolo Bonzini | c3adb5b | 2011-09-16 16:40:02 +0200 | [diff] [blame] | 191 | dbs->common.cb = NULL; |
| 192 | dma_complete(dbs, 0); |
Christoph Hellwig | c16b5a2 | 2009-05-25 12:37:32 +0200 | [diff] [blame] | 193 | } |
| 194 | |
Stefan Hajnoczi | d7331be | 2012-10-31 16:34:37 +0100 | [diff] [blame] | 195 | static const AIOCBInfo dma_aiocb_info = { |
Christoph Hellwig | c16b5a2 | 2009-05-25 12:37:32 +0200 | [diff] [blame] | 196 | .aiocb_size = sizeof(DMAAIOCB), |
| 197 | .cancel = dma_aio_cancel, |
| 198 | }; |
| 199 | |
Christoph Hellwig | cb144cc | 2011-05-19 10:57:59 +0200 | [diff] [blame] | 200 | BlockDriverAIOCB *dma_bdrv_io( |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 201 | BlockDriverState *bs, QEMUSGList *sg, uint64_t sector_num, |
Christoph Hellwig | cb144cc | 2011-05-19 10:57:59 +0200 | [diff] [blame] | 202 | DMAIOFunc *io_func, BlockDriverCompletionFunc *cb, |
David Gibson | 43cf8ae | 2012-03-27 13:42:23 +1100 | [diff] [blame] | 203 | void *opaque, DMADirection dir) |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 204 | { |
Stefan Hajnoczi | d7331be | 2012-10-31 16:34:37 +0100 | [diff] [blame] | 205 | DMAAIOCB *dbs = qemu_aio_get(&dma_aiocb_info, bs, cb, opaque); |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 206 | |
David Gibson | 43cf8ae | 2012-03-27 13:42:23 +1100 | [diff] [blame] | 207 | trace_dma_bdrv_io(dbs, bs, sector_num, (dir == DMA_DIRECTION_TO_DEVICE)); |
Kevin Wolf | c57c465 | 2011-11-24 06:15:28 -0500 | [diff] [blame] | 208 | |
aliguori | 37b7842 | 2009-03-20 18:26:16 +0000 | [diff] [blame] | 209 | dbs->acb = NULL; |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 210 | dbs->bs = bs; |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 211 | dbs->sg = sg; |
| 212 | dbs->sector_num = sector_num; |
| 213 | dbs->sg_cur_index = 0; |
| 214 | dbs->sg_cur_byte = 0; |
David Gibson | 43cf8ae | 2012-03-27 13:42:23 +1100 | [diff] [blame] | 215 | dbs->dir = dir; |
Christoph Hellwig | cb144cc | 2011-05-19 10:57:59 +0200 | [diff] [blame] | 216 | dbs->io_func = io_func; |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 217 | dbs->bh = NULL; |
| 218 | qemu_iovec_init(&dbs->iov, sg->nsg); |
| 219 | dma_bdrv_cb(dbs, 0); |
aliguori | 37b7842 | 2009-03-20 18:26:16 +0000 | [diff] [blame] | 220 | return &dbs->common; |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 221 | } |
| 222 | |
| 223 | |
| 224 | BlockDriverAIOCB *dma_bdrv_read(BlockDriverState *bs, |
| 225 | QEMUSGList *sg, uint64_t sector, |
| 226 | void (*cb)(void *opaque, int ret), void *opaque) |
| 227 | { |
David Gibson | 43cf8ae | 2012-03-27 13:42:23 +1100 | [diff] [blame] | 228 | return dma_bdrv_io(bs, sg, sector, bdrv_aio_readv, cb, opaque, |
| 229 | DMA_DIRECTION_FROM_DEVICE); |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 230 | } |
| 231 | |
| 232 | BlockDriverAIOCB *dma_bdrv_write(BlockDriverState *bs, |
| 233 | QEMUSGList *sg, uint64_t sector, |
| 234 | void (*cb)(void *opaque, int ret), void *opaque) |
| 235 | { |
David Gibson | 43cf8ae | 2012-03-27 13:42:23 +1100 | [diff] [blame] | 236 | return dma_bdrv_io(bs, sg, sector, bdrv_aio_writev, cb, opaque, |
| 237 | DMA_DIRECTION_TO_DEVICE); |
aliguori | 59a703e | 2009-02-05 21:23:58 +0000 | [diff] [blame] | 238 | } |
Paolo Bonzini | 8171ee3 | 2011-07-06 08:02:14 +0200 | [diff] [blame] | 239 | |
| 240 | |
David Gibson | c65bcef | 2012-06-27 14:50:40 +1000 | [diff] [blame] | 241 | static uint64_t dma_buf_rw(uint8_t *ptr, int32_t len, QEMUSGList *sg, |
| 242 | DMADirection dir) |
Paolo Bonzini | 8171ee3 | 2011-07-06 08:02:14 +0200 | [diff] [blame] | 243 | { |
| 244 | uint64_t resid; |
| 245 | int sg_cur_index; |
| 246 | |
| 247 | resid = sg->size; |
| 248 | sg_cur_index = 0; |
| 249 | len = MIN(len, resid); |
| 250 | while (len > 0) { |
| 251 | ScatterGatherEntry entry = sg->sg[sg_cur_index++]; |
| 252 | int32_t xfer = MIN(len, entry.len); |
Paolo Bonzini | df32fd1 | 2013-04-10 18:15:49 +0200 | [diff] [blame] | 253 | dma_memory_rw(sg->as, entry.base, ptr, xfer, dir); |
Paolo Bonzini | 8171ee3 | 2011-07-06 08:02:14 +0200 | [diff] [blame] | 254 | ptr += xfer; |
| 255 | len -= xfer; |
| 256 | resid -= xfer; |
| 257 | } |
| 258 | |
| 259 | return resid; |
| 260 | } |
| 261 | |
| 262 | uint64_t dma_buf_read(uint8_t *ptr, int32_t len, QEMUSGList *sg) |
| 263 | { |
David Gibson | c65bcef | 2012-06-27 14:50:40 +1000 | [diff] [blame] | 264 | return dma_buf_rw(ptr, len, sg, DMA_DIRECTION_FROM_DEVICE); |
Paolo Bonzini | 8171ee3 | 2011-07-06 08:02:14 +0200 | [diff] [blame] | 265 | } |
| 266 | |
| 267 | uint64_t dma_buf_write(uint8_t *ptr, int32_t len, QEMUSGList *sg) |
| 268 | { |
David Gibson | c65bcef | 2012-06-27 14:50:40 +1000 | [diff] [blame] | 269 | return dma_buf_rw(ptr, len, sg, DMA_DIRECTION_TO_DEVICE); |
Paolo Bonzini | 8171ee3 | 2011-07-06 08:02:14 +0200 | [diff] [blame] | 270 | } |
Paolo Bonzini | 84a6935 | 2011-09-05 14:20:29 +0200 | [diff] [blame] | 271 | |
| 272 | void dma_acct_start(BlockDriverState *bs, BlockAcctCookie *cookie, |
| 273 | QEMUSGList *sg, enum BlockAcctType type) |
| 274 | { |
| 275 | bdrv_acct_start(bs, cookie, sg->size, type); |
| 276 | } |