Re: [PATCH v2] cxl: Refine slice error debug messages
From: Ian Munsie <hidden>
Date: 2016-07-05 04:06:39
I agree with Mikey - this needs a description. But otherwise it looks good to me, and I'll be happy if it stops any more AFU developers from reporting their bugs to us, so happy to add this now: Acked-by: Ian Munsie <redacted> Excerpts from Philippe Bergheaud's message of 2016-07-04 17:07:36 +0200:
quoted hunk ↗ jump to hunk
Signed-off-by: Philippe Bergheaud <redacted> --- Changes since v1: - Rebased on Ian's patch "cxl: Abstract the differences between the PSL and XSL" drivers/misc/cxl/cxl.h | 15 +++++++++++++++ drivers/misc/cxl/guest.c | 9 ++++++--- drivers/misc/cxl/irq.c | 29 +++++++++++++++++++++++++++++ drivers/misc/cxl/native.c | 12 +++++++----- 4 files changed, 57 insertions(+), 8 deletions(-)diff --git a/drivers/misc/cxl/cxl.h b/drivers/misc/cxl/cxl.h index 7745252..d928a8c 100644 --- a/drivers/misc/cxl/cxl.h +++ b/drivers/misc/cxl/cxl.h@@ -188,6 +188,18 @@ static const cxl_p2n_reg_t CXL_PSL_WED_An = {0x0A0}; #define CXL_PSL_ID_An_F (1ull << (63-31)) #define CXL_PSL_ID_An_L (1ull << (63-30)) +/****** CXL_PSL_SERR_An ****************************************************/ +#define CXL_PSL_SERR_An_afuto (1ull << (63-0)) +#define CXL_PSL_SERR_An_afudis (1ull << (63-1)) +#define CXL_PSL_SERR_An_afuov (1ull << (63-2)) +#define CXL_PSL_SERR_An_badsrc (1ull << (63-3)) +#define CXL_PSL_SERR_An_badctx (1ull << (63-4)) +#define CXL_PSL_SERR_An_llcmdis (1ull << (63-5)) +#define CXL_PSL_SERR_An_llcmdto (1ull << (63-6)) +#define CXL_PSL_SERR_An_afupar (1ull << (63-7)) +#define CXL_PSL_SERR_An_afudup (1ull << (63-8)) +#define CXL_PSL_SERR_An_AE (1ull << (63-30)) + /****** CXL_PSL_SCNTL_An ****************************************************/ #define CXL_PSL_SCNTL_An_CR (0x1ull << (63-15)) /* Programming Modes: */@@ -905,4 +917,7 @@ extern const struct cxl_backend_ops *cxl_ops; /* check if the given pci_dev is on the the cxl vphb bus */ bool cxl_pci_is_vphb_device(struct pci_dev *dev); + +/* decode AFU error bits in the PSL register PSL_SERR_An */ +void cxl_afu_decode_psl_serr(struct cxl_afu *afu, u64 serr); #endifdiff --git a/drivers/misc/cxl/guest.c b/drivers/misc/cxl/guest.c index bc8d0b9..d516d0a 100644 --- a/drivers/misc/cxl/guest.c +++ b/drivers/misc/cxl/guest.c@@ -196,15 +196,18 @@ static irqreturn_t guest_slice_irq_err(int irq, void *data) { struct cxl_afu *afu = data; int rc; - u64 serr; + u64 serr, afu_error, dsisr; - WARN(irq, "CXL SLICE ERROR interrupt %i\n", irq); rc = cxl_h_get_fn_error_interrupt(afu->guest->handle, &serr); if (rc) { dev_crit(&afu->dev, "Couldn't read PSL_SERR_An: %d\n", rc); return IRQ_HANDLED; } - dev_crit(&afu->dev, "PSL_SERR_An: 0x%.16llx\n", serr); + afu_error = cxl_p2n_read(afu, CXL_AFU_ERR_An); + dsisr = cxl_p2n_read(afu, CXL_PSL_DSISR_An); + cxl_afu_decode_psl_serr(afu, serr); + dev_crit(&afu->dev, "AFU_ERR_An: 0x%.16llx\n", afu_error); + dev_crit(&afu->dev, "PSL_DSISR_An: 0x%.16llx\n", dsisr); rc = cxl_h_ack_fn_error_interrupt(afu->guest->handle, serr); if (rc)diff --git a/drivers/misc/cxl/irq.c b/drivers/misc/cxl/irq.c index 8def455..40fffe4 100644 --- a/drivers/misc/cxl/irq.c +++ b/drivers/misc/cxl/irq.c@@ -374,3 +374,32 @@ void afu_release_irqs(struct cxl_context *ctx, void *cookie) ctx->irq_count = 0; } + +void cxl_afu_decode_psl_serr(struct cxl_afu *afu, u64 serr) +{ + dev_crit(&afu->dev, + "PSL Slice error received. Check AFU for root cause.\n"); + dev_crit(&afu->dev, "PSL_SERR_An: 0x%016llx\n", serr); + if (serr & CXL_PSL_SERR_An_afuto) + dev_crit(&afu->dev, "AFU MMIO Timeout\n"); + if (serr & CXL_PSL_SERR_An_afudis) + dev_crit(&afu->dev, + "MMIO targeted Accelerator that was not enabled\n"); + if (serr & CXL_PSL_SERR_An_afuov) + dev_crit(&afu->dev, "AFU CTAG Overflow\n"); + if (serr & CXL_PSL_SERR_An_badsrc) + dev_crit(&afu->dev, "Bad Interrupt Source\n"); + if (serr & CXL_PSL_SERR_An_badctx) + dev_crit(&afu->dev, "Bad Context Handle\n"); + if (serr & CXL_PSL_SERR_An_llcmdis) + dev_crit(&afu->dev, "LLCMD to Disabled AFU\n"); + if (serr & CXL_PSL_SERR_An_llcmdto) + dev_crit(&afu->dev, "LLCMD Timeout to AFU\n"); + if (serr & CXL_PSL_SERR_An_afupar) + dev_crit(&afu->dev, "AFU MMIO Parity Error\n"); + if (serr & CXL_PSL_SERR_An_afudup) + dev_crit(&afu->dev, "AFU MMIO Duplicate CTAG Error\n"); + if (serr & CXL_PSL_SERR_An_AE) + dev_crit(&afu->dev, + "AFU asserted JDONE with JERROR in AFU Directed Mode\n"); +}diff --git a/drivers/misc/cxl/native.c b/drivers/misc/cxl/native.c index d867326..c4d8815 100644 --- a/drivers/misc/cxl/native.c +++ b/drivers/misc/cxl/native.c@@ -767,7 +767,7 @@ void cxl_native_psl_irq_dump_regs(struct cxl_context *ctx) dev_crit(&ctx->afu->dev, "PSL_FIR2: 0x%016llx\n", fir2); if (ctx->afu->adapter->native->sl_ops->register_serr_irq) { serr = cxl_p1n_read(ctx->afu, CXL_PSL_SERR_An); - dev_crit(&ctx->afu->dev, "PSL_SERR_An: 0x%016llx\n", serr); + cxl_afu_decode_psl_serr(ctx->afu, serr); } dev_crit(&ctx->afu->dev, "PSL_FIR_SLICE_An: 0x%016llx\n", fir_slice); dev_crit(&ctx->afu->dev, "CXL_PSL_AFU_DEBUG_An: 0x%016llx\n", afu_debug);@@ -861,21 +861,23 @@ void native_irq_wait(struct cxl_context *ctx) static irqreturn_t native_slice_irq_err(int irq, void *data) { struct cxl_afu *afu = data; - u64 fir_slice, errstat, serr, afu_debug; + u64 fir_slice, errstat, serr, afu_debug, afu_error, dsisr; /* * slice err interrupt is only used with full PSL (no XSL) */ - WARN(irq, "CXL SLICE ERROR interrupt %i\n", irq); - serr = cxl_p1n_read(afu, CXL_PSL_SERR_An); fir_slice = cxl_p1n_read(afu, CXL_PSL_FIR_SLICE_An); errstat = cxl_p2n_read(afu, CXL_PSL_ErrStat_An); afu_debug = cxl_p1n_read(afu, CXL_AFU_DEBUG_An); - dev_crit(&afu->dev, "PSL_SERR_An: 0x%016llx\n", serr); + afu_error = cxl_p2n_read(afu, CXL_AFU_ERR_An); + dsisr = cxl_p2n_read(afu, CXL_PSL_DSISR_An); + cxl_afu_decode_psl_serr(afu, serr); dev_crit(&afu->dev, "PSL_FIR_SLICE_An: 0x%016llx\n", fir_slice); dev_crit(&afu->dev, "CXL_PSL_ErrStat_An: 0x%016llx\n", errstat); dev_crit(&afu->dev, "CXL_PSL_AFU_DEBUG_An: 0x%016llx\n", afu_debug); + dev_crit(&afu->dev, "AFU_ERR_An: 0x%.16llx\n", afu_error); + dev_crit(&afu->dev, "PSL_DSISR_An: 0x%.16llx\n", dsisr); cxl_p1n_write(afu, CXL_PSL_SERR_An, serr);