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dmaengine: ioatdma: add error strings to chanerr output 

Provide a mechanism to translate CHANERR bits to English strings in order
to allow user to report more concise errors.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Dave Jiang 2016-07-20 13:14:01 -07:00 committed by Vinod Koul
parent 9546d4cdc8
commit aed681d1dc
1 changed files with 61 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

65
drivers/dma/ioat/dma.c
View File

@ -38,8 +38,54 @@
#include "../dmaengine.h"
static char *chanerr_str[] = {
"DMA Transfer Destination Address Error",
"Next Descriptor Address Error",
"Descriptor Error",
"Chan Address Value Error",
"CHANCMD Error",
"Chipset Uncorrectable Data Integrity Error",
"DMA Uncorrectable Data Integrity Error",
"Read Data Error",
"Write Data Error",
"Descriptor Control Error",
"Descriptor Transfer Size Error",
"Completion Address Error",
"Interrupt Configuration Error",
"Super extended descriptor Address Error",
"Unaffiliated Error",
"CRC or XOR P Error",
"XOR Q Error",
"Descriptor Count Error",
"DIF All F detect Error",
"Guard Tag verification Error",
"Application Tag verification Error",
"Reference Tag verification Error",
"Bundle Bit Error",
"Result DIF All F detect Error",
"Result Guard Tag verification Error",
"Result Application Tag verification Error",
"Result Reference Tag verification Error",
NULL
};
static void ioat_eh(struct ioatdma_chan *ioat_chan);
static void ioat_print_chanerrs(struct ioatdma_chan *ioat_chan, u32 chanerr)
{
int i;
for (i = 0; i < 32; i++) {
if ((chanerr >> i) & 1) {
if (chanerr_str[i]) {
dev_err(to_dev(ioat_chan), "Err(%d): %s\n",
i, chanerr_str[i]);
} else
break;
}
}
}
/**
* ioat_dma_do_interrupt - handler used for single vector interrupt mode
* @irq: interrupt id
@ -774,6 +820,11 @@ static void ioat_eh(struct ioatdma_chan *ioat_chan)
if (chanerr ^ err_handled || chanerr == 0) {
dev_err(to_dev(ioat_chan), "%s: fatal error (%x:%x)\n",
__func__, chanerr, err_handled);
dev_err(to_dev(ioat_chan), "Errors handled:\n");
ioat_print_chanerrs(ioat_chan, err_handled);
dev_err(to_dev(ioat_chan), "Errors not handled:\n");
ioat_print_chanerrs(ioat_chan, (chanerr & ~err_handled));
BUG();
}
@ -833,6 +884,9 @@ void ioat_timer_event(unsigned long data)
chanerr = readl(ioat_chan->reg_base + IOAT_CHANERR_OFFSET);
dev_err(to_dev(ioat_chan), "%s: Channel halted (%x)\n",
__func__, chanerr);
dev_err(to_dev(ioat_chan), "Errors:\n");
ioat_print_chanerrs(ioat_chan, chanerr);
if (test_bit(IOAT_RUN, &ioat_chan->state)) {
spin_lock_bh(&ioat_chan->cleanup_lock);
spin_lock_bh(&ioat_chan->prep_lock);
@ -875,10 +929,13 @@ void ioat_timer_event(unsigned long data)
u32 chanerr;
chanerr = readl(ioat_chan->reg_base + IOAT_CHANERR_OFFSET);
dev_warn(to_dev(ioat_chan), "CHANSTS: %#Lx CHANERR: %#x\n",
status, chanerr);
dev_warn(to_dev(ioat_chan), "Active descriptors: %d\n",
ioat_ring_active(ioat_chan));
dev_err(to_dev(ioat_chan), "CHANSTS: %#Lx CHANERR: %#x\n",
status, chanerr);
dev_err(to_dev(ioat_chan), "Errors:\n");
ioat_print_chanerrs(ioat_chan, chanerr);
dev_dbg(to_dev(ioat_chan), "Active descriptors: %d\n",
ioat_ring_active(ioat_chan));
spin_lock_bh(&ioat_chan->prep_lock);
set_bit(IOAT_CHAN_DOWN, &ioat_chan->state);