PCI/AER: Print TLP Log for errors introduced since PCIe r1.1

When reporting an error, the AER driver prints the TLP Header / Prefix Log
only for errors enumerated in the AER_LOG_TLP_MASKS macro.

The macro was never amended since its introduction in 2006 with commit
6c2b374d7485 ("PCI-Express AER implemetation: AER core and aerdriver").
At the time, PCIe r1.1 was the latest spec revision.

Amend the macro with errors defined since then to avoid omitting the TLP
Header / Prefix Log for newer errors.

The order of the errors in AER_LOG_TLP_MASKS follows PCIe r1.1 sec 6.2.7
rather than 7.10.2, because only the former documents for which errors a
TLP Header / Prefix is logged.  Retain this order.  The section number is
still 6.2.7 in today's PCIe r7.0.

For Completion Timeouts, the TLP Header / Prefix is only logged if the
Completion Timeout Prefix / Header Log Capable bit is set in the AER
Capabilities and Control register.  Introduce a tlp_header_logged() helper
to check whether the TLP Header / Prefix Log is populated and use it in
the two places which currently match against AER_LOG_TLP_MASKS directly.

For Uncorrectable Internal Errors, logging of the TLP Header / Prefix is
optional per PCIe r7.0 sec 6.2.7.  If needed, drivers could indicate
through a flag whether devices are capable and tlp_header_logged() could
then check that flag.

pcitools introduced macros for newer errors with commit 144b0911cc0b
("ls-ecaps: extend decode support for more fields for AER CE and UE
status"):
  https://git.kernel.org/pub/scm/utils/pciutils/pciutils.git/commit/?id=144b0911cc0b

Unfortunately some of those macros are overly long:
  PCI_ERR_UNC_POISONED_TLP_EGRESS
  PCI_ERR_UNC_DMWR_REQ_EGRESS_BLOCKED
  PCI_ERR_UNC_IDE_CHECK
  PCI_ERR_UNC_MISR_IDE_TLP
  PCI_ERR_UNC_PCRC_CHECK
  PCI_ERR_UNC_TLP_XLAT_EGRESS_BLOCKED

This seems unsuitable for <linux/pci_regs.h>, so shorten to:
  PCI_ERR_UNC_POISON_BLK
  PCI_ERR_UNC_DMWR_BLK
  PCI_ERR_UNC_IDE_CHECK
  PCI_ERR_UNC_MISR_IDE
  PCI_ERR_UNC_PCRC_CHECK
  PCI_ERR_UNC_XLAT_BLK

Note that some of the existing macros in <linux/pci_regs.h> do not match
exactly with pcitools (e.g. PCI_ERR_UNC_SDES versus PCI_ERR_UNC_SURPDN),
so it does not seem mandatory for them to be identical.

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/5f707caf1260bd8f15012bb032f7da9a9b898aba.1756712066.git.lukas@wunner.de

1 files changed, 7 insertions, 0 deletions

diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h
index f5b17745de60..ae1f52e8d515 100644
--- a/include/uapi/linux/pci_regs.h
+++ b/include/uapi/linux/pci_regs.h
@@ -776,6 +776,12 @@
 #define  PCI_ERR_UNC_MCBTLP	0x00800000	/* MC blocked TLP */
 #define  PCI_ERR_UNC_ATOMEG	0x01000000	/* Atomic egress blocked */
 #define  PCI_ERR_UNC_TLPPRE	0x02000000	/* TLP prefix blocked */
+#define  PCI_ERR_UNC_POISON_BLK	0x04000000	/* Poisoned TLP Egress Blocked */
+#define  PCI_ERR_UNC_DMWR_BLK	0x08000000	/* DMWr Request Egress Blocked */
+#define  PCI_ERR_UNC_IDE_CHECK	0x10000000	/* IDE Check Failed */
+#define  PCI_ERR_UNC_MISR_IDE	0x20000000	/* Misrouted IDE TLP */
+#define  PCI_ERR_UNC_PCRC_CHECK	0x40000000	/* PCRC Check Failed */
+#define  PCI_ERR_UNC_XLAT_BLK	0x80000000	/* TLP Translation Egress Blocked */
 #define PCI_ERR_UNCOR_MASK	0x08	/* Uncorrectable Error Mask */
 	/* Same bits as above */
 #define PCI_ERR_UNCOR_SEVER	0x0c	/* Uncorrectable Error Severity */
@@ -798,6 +804,7 @@
 #define  PCI_ERR_CAP_ECRC_CHKC		0x00000080 /* ECRC Check Capable */
 #define  PCI_ERR_CAP_ECRC_CHKE		0x00000100 /* ECRC Check Enable */
 #define  PCI_ERR_CAP_PREFIX_LOG_PRESENT	0x00000800 /* TLP Prefix Log Present */
+#define  PCI_ERR_CAP_COMP_TIME_LOG	0x00001000 /* Completion Timeout Prefix/Header Log Capable */
 #define  PCI_ERR_CAP_TLP_LOG_FLIT	0x00040000 /* TLP was logged in Flit Mode */
 #define  PCI_ERR_CAP_TLP_LOG_SIZE	0x00f80000 /* Logged TLP Size (only in Flit mode) */
 #define PCI_ERR_HEADER_LOG	0x1c	/* Header Log Register (16 bytes) */