---

yaml
---
r: 256630
b: refs/heads/master
c: 951cc93
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 415b3334a21aa67806c52d1acf4e72e14f7f402f
+refs/heads/master: 951cc93a7493a81a47e20231441bc6cf17c98a37

trunk/Documentation/filesystems/ubifs.txt

@@ -111,34 +111,6 @@ The following is an example of the kernel boot arguments to attach mtd0
 to UBI and mount volume "rootfs":
 ubi.mtd=0 root=ubi0:rootfs rootfstype=ubifs
 
-
-Module Parameters for Debugging
-===============================
-
-When UBIFS has been compiled with debugging enabled, there are 2 module
-parameters that are available to control aspects of testing and debugging.
-
-debug_chks	Selects extra checks that UBIFS can do while running:
-
-		Check					Flag value
-
-		General checks				1
-		Check Tree Node Cache (TNC)		2
-		Check indexing tree size		4
-		Check orphan area			8
-		Check old indexing tree			16
-		Check LEB properties (lprops)		32
-		Check leaf nodes and inodes		64
-
-debug_tsts	Selects a mode of testing, as follows:
-
-		Test mode				Flag value
-
-		Failure mode for recovery testing	4
-
-For example, set debug_chks to 3 to enable general and TNC checks.
-
-
 References
 ==========
 

trunk/Documentation/mmc/00-INDEX

@@ -4,3 +4,5 @@ mmc-dev-attrs.txt
         - info on SD and MMC device attributes
 mmc-dev-parts.txt
         - info on SD and MMC device partitions
+mmc-async-req.txt
+        - info on mmc asynchronous requests

trunk/Documentation/mmc/mmc-async-req.txt

@@ -0,0 +1,87 @@
+Rationale
+=========
+
+How significant is the cache maintenance overhead?
+It depends. Fast eMMC and multiple cache levels with speculative cache
+pre-fetch makes the cache overhead relatively significant. If the DMA
+preparations for the next request are done in parallel with the current
+transfer, the DMA preparation overhead would not affect the MMC performance.
+The intention of non-blocking (asynchronous) MMC requests is to minimize the
+time between when an MMC request ends and another MMC request begins.
+Using mmc_wait_for_req(), the MMC controller is idle while dma_map_sg and
+dma_unmap_sg are processing. Using non-blocking MMC requests makes it
+possible to prepare the caches for next job in parallel with an active
+MMC request.
+
+MMC block driver
+================
+
+The mmc_blk_issue_rw_rq() in the MMC block driver is made non-blocking.
+The increase in throughput is proportional to the time it takes to
+prepare (major part of preparations are dma_map_sg() and dma_unmap_sg())
+a request and how fast the memory is. The faster the MMC/SD is the
+more significant the prepare request time becomes. Roughly the expected
+performance gain is 5% for large writes and 10% on large reads on a L2 cache
+platform. In power save mode, when clocks run on a lower frequency, the DMA
+preparation may cost even more. As long as these slower preparations are run
+in parallel with the transfer performance won't be affected.
+
+Details on measurements from IOZone and mmc_test
+================================================
+
+https://wiki.linaro.org/WorkingGroups/Kernel/Specs/StoragePerfMMC-async-req
+
+MMC core API extension
+======================
+
+There is one new public function mmc_start_req().
+It starts a new MMC command request for a host. The function isn't
+truly non-blocking. If there is an ongoing async request it waits
+for completion of that request and starts the new one and returns. It
+doesn't wait for the new request to complete. If there is no ongoing
+request it starts the new request and returns immediately.
+
+MMC host extensions
+===================
+
+There are two optional members in the mmc_host_ops -- pre_req() and
+post_req() -- that the host driver may implement in order to move work
+to before and after the actual mmc_host_ops.request() function is called.
+In the DMA case pre_req() may do dma_map_sg() and prepare the DMA
+descriptor, and post_req() runs the dma_unmap_sg().
+
+Optimize for the first request
+==============================
+
+The first request in a series of requests can't be prepared in parallel
+with the previous transfer, since there is no previous request.
+The argument is_first_req in pre_req() indicates that there is no previous
+request. The host driver may optimize for this scenario to minimize
+the performance loss. A way to optimize for this is to split the current
+request in two chunks, prepare the first chunk and start the request,
+and finally prepare the second chunk and start the transfer.
+
+Pseudocode to handle is_first_req scenario with minimal prepare overhead:
+
+if (is_first_req && req->size > threshold)
+   /* start MMC transfer for the complete transfer size */
+   mmc_start_command(MMC_CMD_TRANSFER_FULL_SIZE);
+
+   /*
+    * Begin to prepare DMA while cmd is being processed by MMC.
+    * The first chunk of the request should take the same time
+    * to prepare as the "MMC process command time".
+    * If prepare time exceeds MMC cmd time
+    * the transfer is delayed, guesstimate max 4k as first chunk size.
+    */
+    prepare_1st_chunk_for_dma(req);
+    /* flush pending desc to the DMAC (dmaengine.h) */
+    dma_issue_pending(req->dma_desc);
+
+    prepare_2nd_chunk_for_dma(req);
+    /*
+     * The second issue_pending should be called before MMC runs out
+     * of the first chunk. If the MMC runs out of the first data chunk
+     * before this call, the transfer is delayed.
+     */
+    dma_issue_pending(req->dma_desc);

trunk/Documentation/virtual/lguest/lguest.c

@@ -51,7 +51,7 @@
 #include <asm/bootparam.h>
 #include "../../../include/linux/lguest_launcher.h"
 /*L:110
- * We can ignore the 42 include files we need for this program, but I do want
+ * We can ignore the 43 include files we need for this program, but I do want
  * to draw attention to the use of kernel-style types.
  *
  * As Linus said, "C is a Spartan language, and so should your naming be."  I
@@ -65,7 +65,6 @@ typedef uint16_t u16;
 typedef uint8_t u8;
 /*:*/
 
-#define PAGE_PRESENT 0x7 	/* Present, RW, Execute */
 #define BRIDGE_PFX "bridge:"
 #ifndef SIOCBRADDIF
 #define SIOCBRADDIF	0x89a2		/* add interface to bridge      */
@@ -861,8 +860,10 @@ static void console_output(struct virtqueue *vq)
 	/* writev can return a partial write, so we loop here. */
 	while (!iov_empty(iov, out)) {
 		int len = writev(STDOUT_FILENO, iov, out);
-		if (len <= 0)
-			err(1, "Write to stdout gave %i", len);
+		if (len <= 0) {
+			warn("Write to stdout gave %i (%d)", len, errno);
+			break;
+		}
 		iov_consume(iov, out, len);
 	}
 
@@ -898,7 +899,7 @@ static void net_output(struct virtqueue *vq)
 	 * same format: what a coincidence!
 	 */
 	if (writev(net_info->tunfd, iov, out) < 0)
-		errx(1, "Write to tun failed?");
+		warnx("Write to tun failed (%d)?", errno);
 
 	/*
 	 * Done with that one; wait_for_vq_desc() will send the interrupt if
@@ -955,7 +956,7 @@ static void net_input(struct virtqueue *vq)
 	 */
 	len = readv(net_info->tunfd, iov, in);
 	if (len <= 0)
-		err(1, "Failed to read from tun.");
+		warn("Failed to read from tun (%d).", errno);
 
 	/*
 	 * Mark that packet buffer as used, but don't interrupt here.  We want
@@ -1093,9 +1094,10 @@ static void update_device_status(struct device *dev)
 		warnx("Device %s configuration FAILED", dev->name);
 		if (dev->running)
 			reset_device(dev);
-	} else if (dev->desc->status & VIRTIO_CONFIG_S_DRIVER_OK) {
-		if (!dev->running)
-			start_device(dev);
+	} else {
+		if (dev->running)
+			err(1, "Device %s features finalized twice", dev->name);
+		start_device(dev);
 	}
 }
 
@@ -1120,25 +1122,11 @@ static void handle_output(unsigned long addr)
 			return;
 		}
 
-		/*
-		 * Devices *can* be used before status is set to DRIVER_OK.
-		 * The original plan was that they would never do this: they
-		 * would always finish setting up their status bits before
-		 * actually touching the virtqueues.  In practice, we allowed
-		 * them to, and they do (eg. the disk probes for partition
-		 * tables as part of initialization).
-		 *
-		 * If we see this, we start the device: once it's running, we
-		 * expect the device to catch all the notifications.
-		 */
+		/* Devices should not be used before features are finalized. */
 		for (vq = i->vq; vq; vq = vq->next) {
 			if (addr != vq->config.pfn*getpagesize())
 				continue;
-			if (i->running)
-				errx(1, "Notification on running %s", i->name);
-			/* This just calls create_thread() for each virtqueue */
-			start_device(i);
-			return;
+			errx(1, "Notification on %s before setup!", i->name);
 		}
 	}
 
@@ -1370,7 +1358,7 @@ static void setup_console(void)
  * --sharenet=<name> option which opens or creates a named pipe.  This can be
  * used to send packets to another guest in a 1:1 manner.
  *
- * More sopisticated is to use one of the tools developed for project like UML
+ * More sophisticated is to use one of the tools developed for project like UML
  * to do networking.
  *
  * Faster is to do virtio bonding in kernel.  Doing this 1:1 would be
@@ -1380,7 +1368,7 @@ static void setup_console(void)
  * multiple inter-guest channels behind one interface, although it would
  * require some manner of hotplugging new virtio channels.
  *
- * Finally, we could implement a virtio network switch in the kernel.
+ * Finally, we could use a virtio network switch in the kernel, ie. vhost.
 :*/
 
 static u32 str2ip(const char *ipaddr)
@@ -2017,10 +2005,7 @@ int main(int argc, char *argv[])
 	/* Tell the entry path not to try to reload segment registers. */
 	boot->hdr.loadflags |= KEEP_SEGMENTS;
 
-	/*
-	 * We tell the kernel to initialize the Guest: this returns the open
-	 * /dev/lguest file descriptor.
-	 */
+	/* We tell the kernel to initialize the Guest. */
 	tell_kernel(start);
 
 	/* Ensure that we terminate if a device-servicing child dies. */

trunk/Documentation/x86/boot.txt

@@ -674,7 +674,7 @@ Protocol:	2.10+
 
 Field name:	init_size
 Type:		read
-Offset/size:	0x25c/4
+Offset/size:	0x260/4
 
   This field indicates the amount of linear contiguous memory starting
   at the kernel runtime start address that the kernel needs before it

trunk/MAINTAINERS

@@ -1,4 +1,5 @@
 
+
 	List of maintainers and how to submit kernel changes
 
 Please try to follow the guidelines below.  This will make things
@@ -4584,9 +4585,8 @@ S:	Maintained
 F:	drivers/mmc/host/omap.c
 
 OMAP HS MMC SUPPORT
-M:	Madhusudhan Chikkature <madhu.cr@ti.com>
 L:	linux-omap@vger.kernel.org
-S:	Maintained
+S:	Orphan
 F:	drivers/mmc/host/omap_hsmmc.c
 
 OMAP RANDOM NUMBER GENERATOR SUPPORT
@@ -6242,9 +6242,14 @@ F:	drivers/char/toshiba.c
 F:	include/linux/toshiba.h
 
 TMIO MMC DRIVER
+M:	Guennadi Liakhovetski <g.liakhovetski@gmx.de>
 M:	Ian Molton <ian@mnementh.co.uk>
+L:	linux-mmc@vger.kernel.org
 S:	Maintained
-F:	drivers/mmc/host/tmio_mmc.*
+F:	drivers/mmc/host/tmio_mmc*
+F:	drivers/mmc/host/sh_mobile_sdhi.c
+F:	include/linux/mmc/tmio.h
+F:	include/linux/mmc/sh_mobile_sdhi.h
 
 TMPFS (SHMEM FILESYSTEM)
 M:	Hugh Dickins <hughd@google.com>
@@ -6321,7 +6326,7 @@ F:	drivers/scsi/u14-34f.c
 
 UBI FILE SYSTEM (UBIFS)
 M:	Artem Bityutskiy <dedekind1@gmail.com>
-M:	Adrian Hunter <adrian.hunter@nokia.com>
+M:	Adrian Hunter <adrian.hunter@intel.com>
 L:	linux-mtd@lists.infradead.org
 T:	git git://git.infradead.org/ubifs-2.6.git
 W:	http://www.linux-mtd.infradead.org/doc/ubifs.html

trunk/Makefile

@@ -1,7 +1,7 @@
 VERSION = 3
 PATCHLEVEL = 0
 SUBLEVEL = 0
-EXTRAVERSION = -rc7
+EXTRAVERSION =
 NAME = Sneaky Weasel
 
 # *DOCUMENTATION*

trunk/arch/arm/configs/mmp2_defconfig

@@ -8,6 +8,7 @@ CONFIG_MODULE_UNLOAD=y
 CONFIG_MODULE_FORCE_UNLOAD=y
 # CONFIG_BLK_DEV_BSG is not set
 CONFIG_ARCH_MMP=y
+CONFIG_MACH_BROWNSTONE=y
 CONFIG_MACH_FLINT=y
 CONFIG_MACH_MARVELL_JASPER=y
 CONFIG_HIGH_RES_TIMERS=y
@@ -63,10 +64,16 @@ CONFIG_BACKLIGHT_MAX8925=y
 # CONFIG_USB_SUPPORT is not set
 CONFIG_RTC_CLASS=y
 CONFIG_RTC_DRV_MAX8925=y
+CONFIG_MMC=y
 # CONFIG_DNOTIFY is not set
 CONFIG_INOTIFY=y
 CONFIG_TMPFS=y
 CONFIG_TMPFS_POSIX_ACL=y
+CONFIG_EXT2_FS=y
+CONFIG_EXT3_FS=y
+CONFIG_EXT4_FS=y
+CONFIG_MSDOS_FS=y
+CONFIG_FAT_DEFAULT_CODEPAGE=437
 CONFIG_JFFS2_FS=y
 CONFIG_CRAMFS=y
 CONFIG_NFS_FS=y
@@ -81,7 +88,7 @@ CONFIG_DEBUG_KERNEL=y
 # CONFIG_DEBUG_PREEMPT is not set
 CONFIG_DEBUG_INFO=y
 # CONFIG_RCU_CPU_STALL_DETECTOR is not set
-CONFIG_DYNAMIC_DEBUG=y
+# CONFIG_DYNAMIC_DEBUG is not set
 CONFIG_DEBUG_USER=y
 CONFIG_DEBUG_ERRORS=y
 # CONFIG_CRYPTO_ANSI_CPRNG is not set

trunk/arch/arm/mach-mmp/brownstone.c

@@ -177,9 +177,16 @@ static struct i2c_board_info brownstone_twsi1_info[] = {
 };
 
 static struct sdhci_pxa_platdata mmp2_sdh_platdata_mmc0 = {
-	.max_speed	= 25000000,
+	.clk_delay_cycles = 0x1f,
 };
 
+static struct sdhci_pxa_platdata mmp2_sdh_platdata_mmc2 = {
+	.clk_delay_cycles = 0x1f,
+	.flags = PXA_FLAG_CARD_PERMANENT
+		| PXA_FLAG_SD_8_BIT_CAPABLE_SLOT,
+};
+
+
 static void __init brownstone_init(void)
 {
 	mfp_config(ARRAY_AND_SIZE(brownstone_pin_config));
@@ -189,6 +196,7 @@ static void __init brownstone_init(void)
 	mmp2_add_uart(3);
 	mmp2_add_twsi(1, NULL, ARRAY_AND_SIZE(brownstone_twsi1_info));
 	mmp2_add_sdhost(0, &mmp2_sdh_platdata_mmc0); /* SD/MMC */
+	mmp2_add_sdhost(2, &mmp2_sdh_platdata_mmc2); /* eMMC */
 
 	/* enable 5v regulator */
 	platform_device_register(&brownstone_v_5vp_device);

trunk/arch/arm/mach-mmp/include/mach/mmp2.h

@@ -1,7 +1,7 @@
 #ifndef __ASM_MACH_MMP2_H
 #define __ASM_MACH_MMP2_H
 
-#include <plat/sdhci.h>
+#include <linux/platform_data/pxa_sdhci.h>
 
 struct sys_timer;
 

trunk/arch/arm/mach-mmp/jasper.c

@@ -154,7 +154,7 @@ static struct i2c_board_info jasper_twsi1_info[] = {
 };
 
 static struct sdhci_pxa_platdata mmp2_sdh_platdata_mmc0 = {
-	.max_speed	= 25000000,
+	.clk_delay_cycles = 0x1f,
 };
 
 static void __init jasper_init(void)