aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/apm821xx/patches-4.19/010-dmaengine-dw-dmac-implement-dma-prot.patch
diff options
context:
space:
mode:
authorDaniel Golle <daniel@makrotopia.org>2019-06-12 01:14:25 +0200
committerDaniel Golle <daniel@makrotopia.org>2019-06-12 01:18:52 +0200
commit000d400baa0af2e42c9a462e42df7dc9abde1ec7 (patch)
treea11c2dd570e8f02c4a141f135fc8db1e1d391ef2 /target/linux/apm821xx/patches-4.19/010-dmaengine-dw-dmac-implement-dma-prot.patch
parentc4e727f01cc40bd57274d0b885b0f75cde9c4683 (diff)
downloadupstream-000d400baa0af2e42c9a462e42df7dc9abde1ec7.tar.gz
upstream-000d400baa0af2e42c9a462e42df7dc9abde1ec7.tar.bz2
upstream-000d400baa0af2e42c9a462e42df7dc9abde1ec7.zip
kernel: drop everything not on kernel version 4.14
* Remove testing patches for kernel version 4.19 * remove targets ar7, ixp4xx, orion Those targets are still on kernel 4.9, patches for 4.14 were not ready in time. They may be readded once people prepare and test patches for kernel 4.14. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Diffstat (limited to 'target/linux/apm821xx/patches-4.19/010-dmaengine-dw-dmac-implement-dma-prot.patch')
-rw-r--r--target/linux/apm821xx/patches-4.19/010-dmaengine-dw-dmac-implement-dma-prot.patch141
1 files changed, 0 insertions, 141 deletions
diff --git a/target/linux/apm821xx/patches-4.19/010-dmaengine-dw-dmac-implement-dma-prot.patch b/target/linux/apm821xx/patches-4.19/010-dmaengine-dw-dmac-implement-dma-prot.patch
deleted file mode 100644
index 86da6fcd89..0000000000
--- a/target/linux/apm821xx/patches-4.19/010-dmaengine-dw-dmac-implement-dma-prot.patch
+++ /dev/null
@@ -1,141 +0,0 @@
-From 7b0c03ecc42fb223baf015877fee9d517c2c8af1 Mon Sep 17 00:00:00 2001
-From: Christian Lamparter <chunkeey@gmail.com>
-Date: Sat, 17 Nov 2018 17:17:21 +0100
-Subject: dmaengine: dw-dmac: implement dma protection control setting
-
-This patch adds a new device-tree property that allows to
-specify the dma protection control bits for the all of the
-DMA controller's channel uniformly.
-
-Setting the "correct" bits can have a huge impact on the
-PPC460EX and APM82181 that use this DMA engine in combination
-with a DesignWare' SATA-II core (sata_dwc_460ex driver).
-
-In the OpenWrt Forum, the user takimata reported that:
-|It seems your patch unleashed the full power of the SATA port.
-|Where I was previously hitting a really hard limit at around
-|82 MB/s for reading and 27 MB/s for writing, I am now getting this:
-|
-|root@OpenWrt:/mnt# time dd if=/dev/zero of=tempfile bs=1M count=1024
-|1024+0 records in
-|1024+0 records out
-|real 0m 13.65s
-|user 0m 0.01s
-|sys 0m 11.89s
-|
-|root@OpenWrt:/mnt# time dd if=tempfile of=/dev/null bs=1M count=1024
-|1024+0 records in
-|1024+0 records out
-|real 0m 8.41s
-|user 0m 0.01s
-|sys 0m 4.70s
-|
-|This means: 121 MB/s reading and 75 MB/s writing!
-|
-|The drive is a WD Green WD10EARX taken from an older MBL Single.
-|I repeated the test a few times with even larger files to rule out
-|any caching, I'm still seeing the same great performance. OpenWrt is
-|now completely on par with the original MBL firmware's performance.
-
-Another user And.short reported:
-|I can report that your fix worked! Boots up fine with two
-|drives even with more partitions, and no more reboot on
-|concurrent disk access!
-
-A closer look into the sata_dwc_460ex code revealed that
-the driver did initally set the correct protection control
-bits. However, this feature was lost when the sata_dwc_460ex
-driver was converted to the generic DMA driver framework.
-
-BugLink: https://forum.openwrt.org/t/wd-mybook-live-duo-two-disks/16195/55
-BugLink: https://forum.openwrt.org/t/wd-mybook-live-duo-two-disks/16195/50
-Fixes: 8b3444852a2b ("sata_dwc_460ex: move to generic DMA driver")
-Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
-Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
-Signed-off-by: Vinod Koul <vkoul@kernel.org>
----
-
---- a/drivers/dma/dw/core.c
-+++ b/drivers/dma/dw/core.c
-@@ -160,12 +160,14 @@ static void dwc_initialize_chan_idma32(s
-
- static void dwc_initialize_chan_dw(struct dw_dma_chan *dwc)
- {
-+ struct dw_dma *dw = to_dw_dma(dwc->chan.device);
- u32 cfghi = DWC_CFGH_FIFO_MODE;
- u32 cfglo = DWC_CFGL_CH_PRIOR(dwc->priority);
- bool hs_polarity = dwc->dws.hs_polarity;
-
- cfghi |= DWC_CFGH_DST_PER(dwc->dws.dst_id);
- cfghi |= DWC_CFGH_SRC_PER(dwc->dws.src_id);
-+ cfghi |= DWC_CFGH_PROTCTL(dw->pdata->protctl);
-
- /* Set polarity of handshake interface */
- cfglo |= hs_polarity ? DWC_CFGL_HS_DST_POL | DWC_CFGL_HS_SRC_POL : 0;
---- a/drivers/dma/dw/platform.c
-+++ b/drivers/dma/dw/platform.c
-@@ -162,6 +162,12 @@ dw_dma_parse_dt(struct platform_device *
- pdata->multi_block[tmp] = 1;
- }
-
-+ if (!of_property_read_u32(np, "snps,dma-protection-control", &tmp)) {
-+ if (tmp > CHAN_PROTCTL_MASK)
-+ return NULL;
-+ pdata->protctl = tmp;
-+ }
-+
- return pdata;
- }
- #else
---- a/drivers/dma/dw/regs.h
-+++ b/drivers/dma/dw/regs.h
-@@ -200,6 +200,10 @@ enum dw_dma_msize {
- #define DWC_CFGH_FCMODE (1 << 0)
- #define DWC_CFGH_FIFO_MODE (1 << 1)
- #define DWC_CFGH_PROTCTL(x) ((x) << 2)
-+#define DWC_CFGH_PROTCTL_DATA (0 << 2) /* data access - always set */
-+#define DWC_CFGH_PROTCTL_PRIV (1 << 2) /* privileged -> AHB HPROT[1] */
-+#define DWC_CFGH_PROTCTL_BUFFER (2 << 2) /* bufferable -> AHB HPROT[2] */
-+#define DWC_CFGH_PROTCTL_CACHE (4 << 2) /* cacheable -> AHB HPROT[3] */
- #define DWC_CFGH_DS_UPD_EN (1 << 5)
- #define DWC_CFGH_SS_UPD_EN (1 << 6)
- #define DWC_CFGH_SRC_PER(x) ((x) << 7)
---- a/include/linux/platform_data/dma-dw.h
-+++ b/include/linux/platform_data/dma-dw.h
-@@ -49,6 +49,7 @@ struct dw_dma_slave {
- * @data_width: Maximum data width supported by hardware per AHB master
- * (in bytes, power of 2)
- * @multi_block: Multi block transfers supported by hardware per channel.
-+ * @protctl: Protection control signals setting per channel.
- */
- struct dw_dma_platform_data {
- unsigned int nr_channels;
-@@ -65,6 +66,11 @@ struct dw_dma_platform_data {
- unsigned char nr_masters;
- unsigned char data_width[DW_DMA_MAX_NR_MASTERS];
- unsigned char multi_block[DW_DMA_MAX_NR_CHANNELS];
-+#define CHAN_PROTCTL_PRIVILEGED BIT(0)
-+#define CHAN_PROTCTL_BUFFERABLE BIT(1)
-+#define CHAN_PROTCTL_CACHEABLE BIT(2)
-+#define CHAN_PROTCTL_MASK GENMASK(2, 0)
-+ unsigned char protctl;
- };
-
- #endif /* _PLATFORM_DATA_DMA_DW_H */
---- /dev/null
-+++ b/include/dt-bindings/dma/dw-dmac.h
-@@ -0,0 +1,14 @@
-+/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
-+
-+#ifndef __DT_BINDINGS_DMA_DW_DMAC_H__
-+#define __DT_BINDINGS_DMA_DW_DMAC_H__
-+
-+/*
-+ * Protection Control bits provide protection against illegal transactions.
-+ * The protection bits[0:2] are one-to-one mapped to AHB HPROT[3:1] signals.
-+ */
-+#define DW_DMAC_HPROT1_PRIVILEGED_MODE (1 << 0) /* Privileged Mode */
-+#define DW_DMAC_HPROT2_BUFFERABLE (1 << 1) /* DMA is bufferable */
-+#define DW_DMAC_HPROT3_CACHEABLE (1 << 2) /* DMA is cacheable */
-+
-+#endif /* __DT_BINDINGS_DMA_DW_DMAC_H__ */