Revision 5ea47691bd99e1100707ec63364aff72324e2af4 authored by Daniel Drake on 20 March 2019, 06:36:53 UTC, committed by Ulf Hansson on 21 March 2019, 10:19:06 UTC
Setting max_blk_count to 1 here was causing the mmc block layer
to always use the MMC_READ_SINGLE_BLOCK command here, which the
driver does not DMA-accelerate.
Drop the max_blk_ settings here. The mmc host defaults suffice,
along with the max_segs and max_seg_size settings, which I have
now documented in more detail.
Now each MMC command reads 4 512-byte blocks, using DMA instead of
PIO. On my SD card, this increases read performance (measured with dd)
from 167kb/sec to 4.6mb/sec.
Link: http://lkml.kernel.org/r/CAD8Lp47L5T3jnAjBiPs1cQ+yFA3L6LJtgFvMETnBrY63-Zdi2g@mail.gmail.com
Signed-off-by: Daniel Drake <drake@endlessm.com>
Reviewed-by: Oleksij Rempel <linux@rempel-privat.de>
Fixes: c5413ad815a6 ("mmc: add new Alcor Micro Cardreader SD/MMC driver")
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
1 parent 031d2cc
system_certificates.S
/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/export.h>
#include <linux/init.h>
__INITRODATA
.align 8
.globl system_certificate_list
system_certificate_list:
__cert_list_start:
#ifdef CONFIG_MODULE_SIG
.incbin "certs/signing_key.x509"
#endif
.incbin "certs/x509_certificate_list"
__cert_list_end:
#ifdef CONFIG_SYSTEM_EXTRA_CERTIFICATE
.globl system_extra_cert
.size system_extra_cert, CONFIG_SYSTEM_EXTRA_CERTIFICATE_SIZE
system_extra_cert:
.fill CONFIG_SYSTEM_EXTRA_CERTIFICATE_SIZE, 1, 0
.align 4
.globl system_extra_cert_used
system_extra_cert_used:
.int 0
#endif /* CONFIG_SYSTEM_EXTRA_CERTIFICATE */
.align 8
.globl system_certificate_list_size
system_certificate_list_size:
#ifdef CONFIG_64BIT
.quad __cert_list_end - __cert_list_start
#else
.long __cert_list_end - __cert_list_start
#endif
Computing file changes ...
