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@xxxxxxxxx> --- drivers/dma/ioat/dma.c | 65 +++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 61 insertions(+), 4 deletions(-) diff --git a/drivers/dma/ioat/dma.c b/drivers/dma/ioat/dma.c index 1bbc005..68e0cad 100644 --- a/drivers/dma/ioat/dma.c +++ b/drivers/dma/ioat/dma.c @@ -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 @@ -769,6 +815,11 @@ 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(); } @@ -829,6 +880,9 @@ 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); @@ -871,10 +925,13 @@ 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); -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html