From db2f38c22ea3f545be3b5772e5f9dc5861b74536 Mon Sep 17 00:00:00 2001 From: David Brownell Date: Wed, 22 Apr 2009 20:33:40 +0200 Subject: palm_bk3710: UDMA performance fix Fix UDMA throughput bug: tCYC averages t2CYCTYP/2, but the code previously assumed it was the same as t2CYCTYP. (That is, it was using just one clock edge, not both.) Move the table's type declaration so it's adjacent to the table, making it more clear what those numbers mean. On one system this change increased throughput by almost 4x: UDMA/66 sometimes topped 23 MB/sec (on a drive known to do much better). On another system it was around a 10% win (UDMA/66 up to 7+ MB/sec). The difference might be caused by the ratio between memory and IDE clocks. In the system with large speedup, this was exactly 2 (as a workaround for a rev 1.1 silicon bug). The other system used a more standard ratio of 1.63 (and rev 2.1 silicon) ... clock domain synch might have some issues, they're not unheard-of. Signed-off-by: David Brownell Acked-by: Sergei Shtylyov Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/palm_bk3710.c | 26 ++++++++++++-------------- 1 file changed, 12 insertions(+), 14 deletions(-) (limited to 'drivers/ide') diff --git a/drivers/ide/palm_bk3710.c b/drivers/ide/palm_bk3710.c index c7acca0b873..d1513b4a457 100644 --- a/drivers/ide/palm_bk3710.c +++ b/drivers/ide/palm_bk3710.c @@ -39,14 +39,6 @@ /* Primary Control Offset */ #define IDE_PALM_ATA_PRI_CTL_OFFSET 0x3F6 -/* - * PalmChip 3710 IDE Controller UDMA timing structure Definition - */ -struct palm_bk3710_udmatiming { - unsigned int rptime; /* Ready to pause time */ - unsigned int cycletime; /* Cycle Time */ -}; - #define BK3710_BMICP 0x00 #define BK3710_BMISP 0x02 #define BK3710_BMIDTP 0x04 @@ -75,13 +67,19 @@ struct palm_bk3710_udmatiming { static unsigned ideclk_period; /* in nanoseconds */ +struct palm_bk3710_udmatiming { + unsigned int rptime; /* tRP -- Ready to pause time (nsec) */ + unsigned int cycletime; /* tCYCTYP2/2 -- avg Cycle Time (nsec) */ + /* tENV is always a minimum of 20 nsec */ +}; + static const struct palm_bk3710_udmatiming palm_bk3710_udmatimings[6] = { - {160, 240}, /* UDMA Mode 0 */ - {125, 160}, /* UDMA Mode 1 */ - {100, 120}, /* UDMA Mode 2 */ - {100, 90}, /* UDMA Mode 3 */ - {100, 60}, /* UDMA Mode 4 */ - {85, 40}, /* UDMA Mode 5 */ + {160, 240 / 2,}, /* UDMA Mode 0 */ + {125, 160 / 2,}, /* UDMA Mode 1 */ + {100, 120 / 2,}, /* UDMA Mode 2 */ + {100, 90 / 2,}, /* UDMA Mode 3 */ + {100, 60 / 2,}, /* UDMA Mode 4 */ + {85, 40 / 2,}, /* UDMA Mode 5 */ }; static void palm_bk3710_setudmamode(void __iomem *base, unsigned int dev, -- cgit v1.2.3 From a1f9a89c90b4ac143c5b6054c2a157572b272cd2 Mon Sep 17 00:00:00 2001 From: Helge Deller Date: Wed, 22 Apr 2009 20:33:40 +0200 Subject: ide-cd: fix kernel crash on hppa regression With 2.6.30-rc2 I face a kernel crash on the 32bit hppa architecture due to ide-cd when udev creates the device nodes at startup: Kernel Fault: Code=26 regs=8ed34c40 (Addr=00000024) IASQ: 00000000 00000000 IAOQ: 1034b5ac 1034b5b0 IIR: 4ab30048 ISR: 00000000 IOR: 00000024 CPU: 0 CR30: 8ed34000 CR31: ffff55ff ORIG_R28: 00000000 IAOQ[0]: ide_complete_rq+0x2c/0x70 IAOQ[1]: ide_complete_rq+0x30/0x70 RP(r2): cdrom_newpc_intr+0x178/0x46c Backtrace: [<1035c608>] cdrom_newpc_intr+0x178/0x46c [<1034c494>] ide_intr+0x1b0/0x214 [<1016d284>] handle_IRQ_event+0x70/0x150 [<1016d4b0>] __do_IRQ+0x14c/0x1cc [<102f7864>] superio_interrupt+0x88/0xbc [<1016d284>] handle_IRQ_event+0x70/0x150 [<1016d4b0>] __do_IRQ+0x14c/0x1cc [<10112efc>] do_cpu_irq_mask+0x9c/0xd0 [<10116068>] intr_return+0x0/0x4 This crash seems to happen due to an uninitialized variable "rc". The compiler even warns about that: CC drivers/ide/ide-cd.o /mnt/sda4/home/cvs/parisc/git-kernel/linus-linux-2.6/drivers/ide/ide-cd.c: In function `cdrom_newpc_intr': /mnt/sda4/home/cvs/parisc/git-kernel/linus-linux-2.6/drivers/ide/ide-cd.c:612: warning: `rc' might be used uninitialized in this function After applying the trivial patch below, which just initializes the variable to zero, the kernel doesn't crash any longer: Starting the hotplug events dispatcher: udevd. Synthesizing the initial hotplug events... hda: command error: status=0x51 { DriveReady SeekComplete Error } hda: command error: error=0x54 <3>{ AbortedCommand LastFailedSense=0x05 } ide: failed opcode was: unknown done. Signed-off-by: Helge Deller Acked-by: Borislav Petkov Cc: Linus Cc: Kyle McMartin Cc: "Rafael J. Wysocki" Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/ide-cd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/ide') diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c index 3aec19d1fdf..3d4e0996976 100644 --- a/drivers/ide/ide-cd.c +++ b/drivers/ide/ide-cd.c @@ -609,7 +609,7 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive) struct request *rq = hwif->rq; ide_expiry_t *expiry = NULL; int dma_error = 0, dma, thislen, uptodate = 0; - int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc, nsectors; + int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0, nsectors; int sense = blk_sense_request(rq); unsigned int timeout; u16 len; -- cgit v1.2.3 From b0aedb04eae79372fbe101d98513773d6b89935d Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bruno=20Pr=C3=A9mont?= Date: Wed, 22 Apr 2009 20:33:41 +0200 Subject: ide: Stop disks on reboot for laptop which cuts power MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit My laptop (Acer Travelmate 660) always cuts the power when rebooting which causes the disk to emergency-park it's head. Add a dmi check to stop disk as for shutdown on this laptop. Signed-off-by: Bruno Prémont Cc: Jeff Garzik Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/ide-gd.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) (limited to 'drivers/ide') diff --git a/drivers/ide/ide-gd.c b/drivers/ide/ide-gd.c index 1aebdf1a4f5..4b6b71e2cdf 100644 --- a/drivers/ide/ide-gd.c +++ b/drivers/ide/ide-gd.c @@ -7,6 +7,7 @@ #include #include #include +#include #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT) #define IDE_DISK_MINORS (1 << PARTN_BITS) @@ -99,6 +100,19 @@ static void ide_gd_resume(ide_drive_t *drive) (void)drive->disk_ops->get_capacity(drive); } +static const struct dmi_system_id ide_coldreboot_table[] = { + { + /* Acer TravelMate 66x cuts power during reboot */ + .ident = "Acer TravelMate 660", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 660"), + }, + }, + + { } /* terminate list */ +}; + static void ide_gd_shutdown(ide_drive_t *drive) { #ifdef CONFIG_ALPHA @@ -115,7 +129,8 @@ static void ide_gd_shutdown(ide_drive_t *drive) the disk to expire its write cache. */ if (system_state != SYSTEM_POWER_OFF) { #else - if (system_state == SYSTEM_RESTART) { + if (system_state == SYSTEM_RESTART && + !dmi_check_system(ide_coldreboot_table)) { #endif drive->disk_ops->flush(drive); return; -- cgit v1.2.3