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[src/trunk]: src/sys/dev/sdmmc Use DMA bounce buffer, if DMA buffer is making...
details: https://anonhg.NetBSD.org/src/rev/f85c24c4a2c0
branches: trunk
changeset: 757875:f85c24c4a2c0
user: kiyohara <kiyohara%NetBSD.org@localhost>
date: Fri Oct 01 09:50:42 2010 +0000
description:
Use DMA bounce buffer, if DMA buffer is making by multiple segments. A lot
of host controllers do not support to two or more segments.
diffstat:
sys/dev/sdmmc/sdmmc.c | 52 ++++++++++++++++++-
sys/dev/sdmmc/sdmmc_mem.c | 123 +++++++++++++++++++++++++++++++++++++++++++--
sys/dev/sdmmc/sdmmcvar.h | 7 ++-
3 files changed, 173 insertions(+), 9 deletions(-)
diffs (truncated from 338 to 300 lines):
diff -r 9b9cb4bb5a8c -r f85c24c4a2c0 sys/dev/sdmmc/sdmmc.c
--- a/sys/dev/sdmmc/sdmmc.c Thu Sep 30 19:45:24 2010 +0000
+++ b/sys/dev/sdmmc/sdmmc.c Fri Oct 01 09:50:42 2010 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: sdmmc.c,v 1.3 2010/09/20 09:06:03 kiyohara Exp $ */
+/* $NetBSD: sdmmc.c,v 1.4 2010/10/01 09:50:42 kiyohara Exp $ */
/* $OpenBSD: sdmmc.c,v 1.18 2009/01/09 10:58:38 jsg Exp $ */
/*
@@ -50,7 +50,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: sdmmc.c,v 1.3 2010/09/20 09:06:03 kiyohara Exp $");
+__KERNEL_RCSID(0, "$NetBSD: sdmmc.c,v 1.4 2010/10/01 09:50:42 kiyohara Exp $");
#include <sys/param.h>
#include <sys/device.h>
@@ -61,6 +61,8 @@
#include <sys/systm.h>
#include <sys/callout.h>
+#include <machine/vmparam.h>
+
#include <dev/sdmmc/sdmmc_ioreg.h>
#include <dev/sdmmc/sdmmcchip.h>
#include <dev/sdmmc/sdmmcreg.h>
@@ -587,12 +589,58 @@
sf->cis.product = SDMMC_PRODUCT_INVALID;
sf->cis.function = SDMMC_FUNCTION_INVALID;
+ if (ISSET(sc->sc_flags, SMF_MEM_MODE) &&
+ ISSET(sc->sc_caps, SMC_CAPS_DMA) &&
+ !ISSET(sc->sc_caps, SMC_CAPS_MULTI_SEG_DMA)) {
+ bus_dma_segment_t ds;
+ int rseg, error;
+
+ error = bus_dmamap_create(sc->sc_dmat, SDMMC_SECTOR_SIZE, 1,
+ SDMMC_SECTOR_SIZE, 0, BUS_DMA_WAITOK, &sf->bbuf_dmap);
+ if (error)
+ goto fail1;
+ error = bus_dmamem_alloc(sc->sc_dmat, SDMMC_SECTOR_SIZE,
+ PAGE_SIZE, 0, &ds, 1, &rseg, BUS_DMA_WAITOK);
+ if (error)
+ goto fail2;
+ error = bus_dmamem_map(sc->sc_dmat, &ds, 1, SDMMC_SECTOR_SIZE,
+ &sf->bbuf, BUS_DMA_WAITOK);
+ if (error)
+ goto fail3;
+ error = bus_dmamap_load(sc->sc_dmat, sf->bbuf_dmap,
+ sf->bbuf, SDMMC_SECTOR_SIZE, NULL,
+ BUS_DMA_WAITOK|BUS_DMA_READ|BUS_DMA_WRITE);
+ if (!error)
+ goto out;
+
+ bus_dmamem_unmap(sc->sc_dmat, sf->bbuf, SDMMC_SECTOR_SIZE);
+fail3:
+ bus_dmamem_free(sc->sc_dmat, &ds, 1);
+fail2:
+ bus_dmamap_destroy(sc->sc_dmat, sf->bbuf_dmap);
+fail1:
+ free(sf, M_DEVBUF);
+ sf = NULL;
+ }
+out:
+
return sf;
}
void
sdmmc_function_free(struct sdmmc_function *sf)
{
+ struct sdmmc_softc *sc = sf->sc;
+
+ if (ISSET(sc->sc_flags, SMF_MEM_MODE) &&
+ ISSET(sc->sc_caps, SMC_CAPS_DMA) &&
+ !ISSET(sc->sc_caps, SMC_CAPS_MULTI_SEG_DMA)) {
+ bus_dmamap_unload(sc->sc_dmat, sf->bbuf_dmap);
+ bus_dmamem_unmap(sc->sc_dmat, sf->bbuf, SDMMC_SECTOR_SIZE);
+ bus_dmamem_free(sc->sc_dmat,
+ sf->bbuf_dmap->dm_segs, sf->bbuf_dmap->dm_nsegs);
+ bus_dmamap_destroy(sc->sc_dmat, sf->bbuf_dmap);
+ }
free(sf, M_DEVBUF);
}
diff -r 9b9cb4bb5a8c -r f85c24c4a2c0 sys/dev/sdmmc/sdmmc_mem.c
--- a/sys/dev/sdmmc/sdmmc_mem.c Thu Sep 30 19:45:24 2010 +0000
+++ b/sys/dev/sdmmc/sdmmc_mem.c Fri Oct 01 09:50:42 2010 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: sdmmc_mem.c,v 1.11 2010/09/23 12:03:27 kiyohara Exp $ */
+/* $NetBSD: sdmmc_mem.c,v 1.12 2010/10/01 09:50:42 kiyohara Exp $ */
/* $OpenBSD: sdmmc_mem.c,v 1.10 2009/01/09 10:55:22 jsg Exp $ */
/*
@@ -46,7 +46,7 @@
/* Routines for SD/MMC memory cards. */
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: sdmmc_mem.c,v 1.11 2010/09/23 12:03:27 kiyohara Exp $");
+__KERNEL_RCSID(0, "$NetBSD: sdmmc_mem.c,v 1.12 2010/10/01 09:50:42 kiyohara Exp $");
#include <sys/param.h>
#include <sys/kernel.h>
@@ -934,10 +934,12 @@
sdmmc_mem_single_read_block(struct sdmmc_function *sf, uint32_t blkno,
u_char *data, size_t datalen)
{
+ struct sdmmc_softc *sc __unused = sf->sc;
int error = 0;
int i;
KASSERT((datalen % SDMMC_SECTOR_SIZE) == 0);
+ KASSERT(!ISSET(sc->sc_caps, SMC_CAPS_DMA));
for (i = 0; i < datalen / SDMMC_SECTOR_SIZE; i++) {
error = sdmmc_mem_read_block_subr(sf, blkno + i,
@@ -954,7 +956,7 @@
{
struct sdmmc_softc *sc = sf->sc;
struct sdmmc_command cmd;
- int error;
+ int error, bbuf, seg, off, len, num;
if (!ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE)) {
error = sdmmc_select_card(sc, sf);
@@ -962,6 +964,10 @@
goto out;
}
+ bbuf = 0;
+ num = 0;
+ seg = off = len = 0;
+retry:
memset(&cmd, 0, sizeof(cmd));
cmd.c_data = data;
cmd.c_datalen = datalen;
@@ -972,8 +978,30 @@
if (!ISSET(sf->flags, SFF_SDHC))
cmd.c_arg <<= SDMMC_SECTOR_SIZE_SB;
cmd.c_flags = SCF_CMD_ADTC | SCF_CMD_READ | SCF_RSP_R1 | SCF_RSP_SPI_R1;
- if (ISSET(sc->sc_caps, SMC_CAPS_DMA))
+ if (ISSET(sc->sc_caps, SMC_CAPS_DMA)) {
cmd.c_dmamap = sc->sc_dmap;
+ if (!ISSET(sc->sc_caps, SMC_CAPS_MULTI_SEG_DMA)) {
+ len = sc->sc_dmap->dm_segs[seg].ds_len - off;
+ len &= ~(SDMMC_SECTOR_SIZE - 1);
+ cmd.c_datalen = len;
+ cmd.c_dmaseg = seg;
+ cmd.c_dmaoff = off;
+ bbuf = 0;
+ if (len == 0) {
+ /* Use bounce buffer */
+ bus_dmamap_sync(sc->sc_dmat, sf->bbuf_dmap,
+ 0, SDMMC_SECTOR_SIZE, BUS_DMASYNC_PREREAD);
+ cmd.c_datalen = SDMMC_SECTOR_SIZE;
+ cmd.c_dmamap = sf->bbuf_dmap;
+ cmd.c_dmaseg = 0;
+ cmd.c_dmaoff = 0;
+ bbuf = 1;
+ len = SDMMC_SECTOR_SIZE;
+ }
+ cmd.c_opcode = (cmd.c_datalen / cmd.c_blklen) > 1 ?
+ MMC_READ_BLOCK_MULTIPLE : MMC_READ_BLOCK_SINGLE;
+ }
+ }
error = sdmmc_mmc_command(sc, &cmd);
if (error)
@@ -1005,6 +1033,34 @@
} while (!ISSET(MMC_R1(cmd.c_resp), MMC_R1_READY_FOR_DATA));
}
+ if (ISSET(sc->sc_caps, SMC_CAPS_DMA) &&
+ !ISSET(sc->sc_caps, SMC_CAPS_MULTI_SEG_DMA)) {
+ bus_dma_segment_t *dm_segs = sc->sc_dmap->dm_segs;
+
+ if (bbuf) {
+ bus_dmamap_sync(sc->sc_dmat, sf->bbuf_dmap,
+ 0, SDMMC_SECTOR_SIZE, BUS_DMASYNC_POSTREAD);
+ bus_dmamap_sync(sc->sc_dmat, sc->sc_dmap, num,
+ SDMMC_SECTOR_SIZE, BUS_DMASYNC_POSTREAD);
+ memcpy(data, sf->bbuf, SDMMC_SECTOR_SIZE);
+ bus_dmamap_sync(sc->sc_dmat, sc->sc_dmap, num,
+ SDMMC_SECTOR_SIZE, BUS_DMASYNC_PREREAD);
+ }
+ num += len;
+ data += len;
+ datalen -= len;
+ blkno += (len / SDMMC_SECTOR_SIZE);
+
+ while (off + len >= dm_segs[seg].ds_len) {
+ len -= dm_segs[seg++].ds_len;
+ off = 0;
+ }
+ off += len;
+
+ if (seg < sc->sc_dmap->dm_nsegs)
+ goto retry;
+ }
+
out:
return error;
}
@@ -1065,10 +1121,12 @@
sdmmc_mem_single_write_block(struct sdmmc_function *sf, uint32_t blkno,
u_char *data, size_t datalen)
{
+ struct sdmmc_softc *sc __unused = sf->sc;
int error = 0;
int i;
KASSERT((datalen % SDMMC_SECTOR_SIZE) == 0);
+ KASSERT(!ISSET(sc->sc_caps, SMC_CAPS_DMA));
for (i = 0; i < datalen / SDMMC_SECTOR_SIZE; i++) {
error = sdmmc_mem_write_block_subr(sf, blkno + i,
@@ -1085,7 +1143,7 @@
{
struct sdmmc_softc *sc = sf->sc;
struct sdmmc_command cmd;
- int error;
+ int error, bbuf, seg, off, len, num;
if (!ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE)) {
error = sdmmc_select_card(sc, sf);
@@ -1093,6 +1151,10 @@
goto out;
}
+ bbuf = 0;
+ num = 0;
+ seg = off = len = 0;
+retry:
memset(&cmd, 0, sizeof(cmd));
cmd.c_data = data;
cmd.c_datalen = datalen;
@@ -1103,8 +1165,35 @@
if (!ISSET(sf->flags, SFF_SDHC))
cmd.c_arg <<= SDMMC_SECTOR_SIZE_SB;
cmd.c_flags = SCF_CMD_ADTC | SCF_RSP_R1;
- if (ISSET(sc->sc_caps, SMC_CAPS_DMA))
+ if (ISSET(sc->sc_caps, SMC_CAPS_DMA)) {
cmd.c_dmamap = sc->sc_dmap;
+ if (!ISSET(sc->sc_caps, SMC_CAPS_MULTI_SEG_DMA)) {
+ len = sc->sc_dmap->dm_segs[seg].ds_len - off;
+ len &= ~(SDMMC_SECTOR_SIZE - 1);
+ cmd.c_datalen = len;
+ cmd.c_dmaseg = seg;
+ cmd.c_dmaoff = off;
+ bbuf = 0;
+ if (len == 0) {
+ /* Use bounce buffer */
+ bus_dmamap_sync(sc->sc_dmat, sc->sc_dmap, num,
+ SDMMC_SECTOR_SIZE, BUS_DMASYNC_POSTWRITE);
+ memcpy(sf->bbuf, data, SDMMC_SECTOR_SIZE);
+ bus_dmamap_sync(sc->sc_dmat, sc->sc_dmap, num,
+ SDMMC_SECTOR_SIZE, BUS_DMASYNC_PREWRITE);
+ bus_dmamap_sync(sc->sc_dmat, sf->bbuf_dmap, 0,
+ SDMMC_SECTOR_SIZE, BUS_DMASYNC_PREWRITE);
+ cmd.c_datalen = SDMMC_SECTOR_SIZE;
+ cmd.c_dmamap = sf->bbuf_dmap;
+ cmd.c_dmaseg = 0;
+ cmd.c_dmaoff = 0;
+ bbuf = 1;
+ len = SDMMC_SECTOR_SIZE;
+ }
+ cmd.c_opcode = (cmd.c_datalen / cmd.c_blklen) > 1 ?
+ MMC_WRITE_BLOCK_MULTIPLE : MMC_WRITE_BLOCK_SINGLE;
+ }
+ }
error = sdmmc_mmc_command(sc, &cmd);
if (error)
@@ -1135,6 +1224,28 @@
} while (!ISSET(MMC_R1(cmd.c_resp), MMC_R1_READY_FOR_DATA));
}
+ if (ISSET(sc->sc_caps, SMC_CAPS_DMA) &&
+ !ISSET(sc->sc_caps, SMC_CAPS_MULTI_SEG_DMA)) {
+ bus_dma_segment_t *dm_segs = sc->sc_dmap->dm_segs;
+
+ if (bbuf)
+ bus_dmamap_sync(sc->sc_dmat, sf->bbuf_dmap,
+ 0, SDMMC_SECTOR_SIZE, BUS_DMASYNC_POSTWRITE);
+ num += len;
+ data += len;
+ datalen -= len;
+ blkno += (len / SDMMC_SECTOR_SIZE);
+
+ while (off + len >= dm_segs[seg].ds_len) {
+ len -= dm_segs[seg++].ds_len;
+ off = 0;
+ }
+ off += len;
+
+ if (seg < sc->sc_dmap->dm_nsegs)
+ goto retry;
+ }
+
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