From c42deffd5b53c9e583d83c7964854ede2f12410d Mon Sep 17 00:00:00 2001 From: Micky Ching Date: Mon, 17 Feb 2014 16:45:48 +0800 Subject: mmc: rtsx: add support for pre_req and post_req Add support for non-blocking request, pre_req() runs dma_map_sg() and post_req() runs dma_unmap_sg(). This patch can increase card read/write speed, especially for high speed card and slow CPU(for some embedded platform). Users can get a great benefit from this patch. if CPU frequency is 800MHz, SDR104 or DDR50 card read/write speed may increase more than 15%. test results: intel i3(800MHz - 2.3GHz), SD card clock 208MHz performance mode(2.3GHz): Before: dd if=/dev/mmcblk0p1 of=/dev/null bs=64k count=1024 67108864 bytes (67 MB) copied, 1.18191 s, 56.8 MB/s After: dd if=/dev/mmcblk0p1 of=/dev/null bs=64k count=1024 67108864 bytes (67 MB) copied, 1.09276 s, 61.4 MB/s powersave mode(800MHz): Before: dd if=/dev/mmcblk0p1 of=/dev/null bs=64k count=1024 67108864 bytes (67 MB) copied, 1.29569 s, 51.8 MB/s After: dd if=/dev/mmcblk0p1 of=/dev/null bs=64k count=1024 67108864 bytes (67 MB) copied, 1.11218 s, 60.3 MB/s Signed-off-by: Micky Ching Signed-off-by: Chris Ball --- include/linux/mfd/rtsx_common.h | 1 + include/linux/mfd/rtsx_pci.h | 6 ++++++ 2 files changed, 7 insertions(+) (limited to 'include/linux/mfd') diff --git a/include/linux/mfd/rtsx_common.h b/include/linux/mfd/rtsx_common.h index 443176ee1ab0..7c36cc55d2c7 100644 --- a/include/linux/mfd/rtsx_common.h +++ b/include/linux/mfd/rtsx_common.h @@ -45,6 +45,7 @@ struct platform_device; struct rtsx_slot { struct platform_device *p_dev; void (*card_event)(struct platform_device *p_dev); + void (*done_transfer)(struct platform_device *p_dev); }; #endif diff --git a/include/linux/mfd/rtsx_pci.h b/include/linux/mfd/rtsx_pci.h index a3835976f7c6..8d6bbd609ad9 100644 --- a/include/linux/mfd/rtsx_pci.h +++ b/include/linux/mfd/rtsx_pci.h @@ -943,6 +943,12 @@ void rtsx_pci_send_cmd_no_wait(struct rtsx_pcr *pcr); int rtsx_pci_send_cmd(struct rtsx_pcr *pcr, int timeout); int rtsx_pci_transfer_data(struct rtsx_pcr *pcr, struct scatterlist *sglist, int num_sg, bool read, int timeout); +int rtsx_pci_dma_map_sg(struct rtsx_pcr *pcr, struct scatterlist *sglist, + int num_sg, bool read); +int rtsx_pci_dma_unmap_sg(struct rtsx_pcr *pcr, struct scatterlist *sglist, + int num_sg, bool read); +int rtsx_pci_dma_transfer(struct rtsx_pcr *pcr, struct scatterlist *sglist, + int sg_count, bool read); int rtsx_pci_read_ppbuf(struct rtsx_pcr *pcr, u8 *buf, int buf_len); int rtsx_pci_write_ppbuf(struct rtsx_pcr *pcr, u8 *buf, int buf_len); int rtsx_pci_card_pull_ctl_enable(struct rtsx_pcr *pcr, int card); -- cgit v1.2.2