diff mbox series

[v3] pciutils: Add decode support for RCECs

Message ID 20200624223940.240463-1-sean.v.kelley@linux.intel.com (mailing list archive)
State Not Applicable, archived
Headers show
Series [v3] pciutils: Add decode support for RCECs | expand

Commit Message

Sean V Kelley June 24, 2020, 10:39 p.m. UTC 
Root Complex Event Collectors provide support for terminating error
and PME messages from RCiEPs.  This patch provides basic decoding for
the lspci RCEC Endpoint Association Extended Capability. See PCIe 5.0-1,
sec 7.9.10 for further details.

Suggested-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Sean V Kelley <sean.v.kelley@linux.intel.com>
---
Changes since v2 [1]:

- Incorporated suggested improvement to RCiEP bitmap generation.
- Extended to support hyphenating adjacent devices in bitmap.
- Added verbose granularity on "none" cases for bitmap and BUSN reporting.
- Corrected use of "first" with "next" as found in the Spec.
- Reported "AssociatedBusNumbers" as a single hyphenated field.
- Regenerated test output with new formatting.
i.e.,

"-vvv" case
Capabilities: [160 v2] Root Complex Event Collector Endpoint Association
        RCiEPBitmap: 00000000 [none]
        AssociatedBusNumbers: ff-00 [none]

"-vv" case
Capabilities: [160 v2] Root Complex Event Collector Endpoint Association
        RCiEPBitmap: [none]
        AssociatedBusNumbers: [none]

(Bjorn Helgaas)

[1] https://lore.kernel.org/linux-pci/20200624040024.895996-1-sean.v.kelley@linux.intel.com/

Thanks,

Sean
---
 lib/header.h   |   8 +-
 ls-ecaps.c     |  59 +++++++++-
 setpci.c       |   2 +-
 tests/cap-rcec | 299 +++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 364 insertions(+), 4 deletions(-)
 create mode 100644 tests/cap-rcec

--
2.27.0

Comments

Martin Mareš Sept. 2, 2020, 8:41 a.m. UTC | #1 
Hello!

> Root Complex Event Collectors provide support for terminating error
> and PME messages from RCiEPs.  This patch provides basic decoding for
> the lspci RCEC Endpoint Association Extended Capability. See PCIe 5.0-1,
> sec 7.9.10 for further details.

Applied.

Thanks and sorry for the delay.

				Have a nice fortnight
Sean V Kelley Sept. 4, 2020, 1:01 a.m. UTC | #2 
On 2 Sep 2020, at 1:41, Martin Mareš wrote:

> Hello!
>
>> Root Complex Event Collectors provide support for terminating error
>> and PME messages from RCiEPs.  This patch provides basic decoding for
>> the lspci RCEC Endpoint Association Extended Capability. See PCIe 5.0-1,
>> sec 7.9.10 for further details.
>
> Applied.
>
> Thanks and sorry for the delay.
>
> 				Have a nice fortnight

Many thanks Martin.

Cheers,

Sean
> -- 
> Martin `MJ' Mareš                        <mj@ucw.cz>   http://mj.ucw.cz/
> United Computer Wizards, Prague, Czech Republic, Europe, Earth, Universe
> A Bash poem: time for echo in canyon; do echo $echo $echo; done
diff mbox series

Patch

diff --git a/lib/header.h b/lib/header.h
index 472816e..57a9343 100644
--- a/lib/header.h
+++ b/lib/header.h
@@ -219,7 +219,7 @@ 
 #define PCI_EXT_CAP_ID_PB	0x04	/* Power Budgeting */
 #define PCI_EXT_CAP_ID_RCLINK	0x05	/* Root Complex Link Declaration */
 #define PCI_EXT_CAP_ID_RCILINK	0x06	/* Root Complex Internal Link Declaration */
-#define PCI_EXT_CAP_ID_RCECOLL	0x07	/* Root Complex Event Collector */
+#define PCI_EXT_CAP_ID_RCEC	0x07	/* Root Complex Event Collector */
 #define PCI_EXT_CAP_ID_MFVC	0x08	/* Multi-Function Virtual Channel */
 #define PCI_EXT_CAP_ID_VC2	0x09	/* Virtual Channel (2nd ID) */
 #define PCI_EXT_CAP_ID_RCRB	0x0a	/* Root Complex Register Block */
@@ -1048,6 +1048,12 @@ 
 #define  PCI_RCLINK_LINK_ADDR	8	/* Link Entry: Address (64-bit) */
 #define  PCI_RCLINK_LINK_SIZE	16	/* Link Entry: sizeof */

+/* Root Complex Event Collector Endpoint Association */
+#define  PCI_RCEC_EP_CAP_VER(reg)	(((reg) >> 16) & 0xf)
+#define  PCI_RCEC_BUSN_REG_VER	0x02	/* as per PCIe sec 7.9.10.1 */
+#define  PCI_RCEC_RCIEP_BMAP	0x0004	/* as per PCIe sec 7.9.10.2 */
+#define  PCI_RCEC_BUSN_REG	0x0008	/* as per PCIe sec 7.9.10.3 */
+
 /* PCIe Vendor-Specific Capability */
 #define PCI_EVNDR_HEADER	4	/* Vendor-Specific Header */
 #define PCI_EVNDR_REGISTERS	8	/* Vendor-Specific Registers */
diff --git a/ls-ecaps.c b/ls-ecaps.c
index e71209e..99c55ff 100644
--- a/ls-ecaps.c
+++ b/ls-ecaps.c
@@ -634,6 +634,61 @@  cap_rclink(struct device *d, int where)
     }
 }

+static void
+cap_rcec(struct device *d, int where)
+{
+  printf("Root Complex Event Collector Endpoint Association\n");
+  if (verbose < 2)
+    return;
+
+  if (!config_fetch(d, where, 12))
+    return;
+
+  u32 hdr = get_conf_long(d, where);
+  byte cap_ver = PCI_RCEC_EP_CAP_VER(hdr);
+  u32 bmap = get_conf_long(d, where + PCI_RCEC_RCIEP_BMAP);
+  printf("\t\tRCiEPBitmap: ");
+  if (bmap)
+    {
+      int prevmatched=0;
+      int adjcount=0;
+      int prevdev=0;
+      printf("RCiEP at Device(s):");
+      for (int dev=0; dev < 32; dev++)
+        {
+	  if (BITS(bmap, dev, 1))
+	    {
+	      if (!adjcount)
+	        printf("%s %u", (prevmatched) ? "," : "", dev);
+	      adjcount++;
+	      prevdev=dev;
+	      prevmatched=1;
+            }
+	  else
+	    {
+	      if (adjcount > 1)
+	        printf("-%u", prevdev);
+	      adjcount=0;
+            }
+        }
+   }
+  else
+    printf("%s", (verbose > 2) ? "00000000 [none]" : "[none]");
+  printf("\n");
+
+  if (cap_ver < PCI_RCEC_BUSN_REG_VER)
+    return;
+
+  u32 busn = get_conf_long(d, where + PCI_RCEC_BUSN_REG);
+  u8 lastbusn = BITS(busn, 16, 8);
+  u8 nextbusn = BITS(busn, 8, 8);
+
+  if ((lastbusn == 0x00) && (nextbusn == 0xff))
+    printf("\t\tAssociatedBusNumbers: %s\n", (verbose > 2) ? "ff-00 [none]" : "[none]");
+  else
+    printf("\t\tAssociatedBusNumbers: %02x-%02x\n", nextbusn, lastbusn );
+}
+
 static void
 cap_dvsec_cxl(struct device *d, int where)
 {
@@ -991,8 +1046,8 @@  show_ext_caps(struct device *d, int type)
 	  case PCI_EXT_CAP_ID_RCILINK:
 	    printf("Root Complex Internal Link <?>\n");
 	    break;
-	  case PCI_EXT_CAP_ID_RCECOLL:
-	    printf("Root Complex Event Collector <?>\n");
+	  case PCI_EXT_CAP_ID_RCEC:
+	    cap_rcec(d, where);
 	    break;
 	  case PCI_EXT_CAP_ID_MFVC:
 	    printf("Multi-Function Virtual Channel <?>\n");
diff --git a/setpci.c b/setpci.c
index 90ca726..2cb70fa 100644
--- a/setpci.c
+++ b/setpci.c
@@ -350,7 +350,7 @@  static const struct reg_name pci_reg_names[] = {
   { 0x20004,	0, 0, "ECAP_PB" },
   { 0x20005,	0, 0, "ECAP_RCLINK" },
   { 0x20006,	0, 0, "ECAP_RCILINK" },
-  { 0x20007,	0, 0, "ECAP_RCECOLL" },
+  { 0x20007,	0, 0, "ECAP_RCEC" },
   { 0x20008,	0, 0, "ECAP_MFVC" },
   { 0x20009,	0, 0, "ECAP_VC2" },
   { 0x2000a,	0, 0, "ECAP_RBCB" },
diff --git a/tests/cap-rcec b/tests/cap-rcec
new file mode 100644
index 0000000..836d9a1
--- /dev/null
+++ b/tests/cap-rcec
@@ -0,0 +1,299 @@ 
+6a:00.4 Generic system peripheral [0807]: Intel Corporation Device 0b23
+        Subsystem: Intel Corporation Device 0000
+        Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
+        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
+        Interrupt: pin A routed to IRQ 255
+        NUMA node: 0
+        Capabilities: [40] Express (v2) Root Complex Event Collector, MSI 00
+                DevCap: MaxPayload 512 bytes, PhantFunc 0
+                        ExtTag- RBE-
+                DevCtl: CorrErr+ NonFatalErr+ FatalErr+ UnsupReq-
+                        RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop-
+                        MaxPayload 128 bytes, MaxReadReq 128 bytes
+                DevSta: CorrErr- NonFatalErr- FatalErr- UnsupReq- AuxPwr- TransPend-
+                RootCap: CRSVisible-
+                RootCtl: ErrCorrectable+ ErrNon-Fatal+ ErrFatal+ PMEIntEna- CRSVisible-
+                RootSta: PME ReqID 0000, PMEStatus- PMEPending-
+                DevCap2: Completion Timeout: Not Supported, TimeoutDis- NROPrPrP- LTR-
+                         10BitTagComp- 10BitTagReq- OBFF Not Supported, ExtFmt- EETLPPrefix-
+                         EmergencyPowerReduction Not Supported, EmergencyPowerReductionInit-
+                         FRS-
+                DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis- LTR- OBFF Disabled,
+        Capabilities: [80] Power Management version 3
+                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
+                Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
+        Capabilities: [90] MSI: Enable- Count=1/1 Maskable+ 64bit-
+                Address: 00000000  Data: 0000
+                Masking: 00000000  Pending: 00000000
+        Capabilities: [100 v1] Advanced Error Reporting
+                UESta:  DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
+                UEMsk:  DLP- SDES+ TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq+ ACSViol-
+                UESvrt: DLP+ SDES- TLP+ FCP+ CmpltTO- CmpltAbrt- UnxCmplt- RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol-
+                CESta:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- AdvNonFatalErr-
+                CEMsk:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- AdvNonFatalErr+
+                AERCap: First Error Pointer: 00, ECRCGenCap- ECRCGenEn- ECRCChkCap- ECRCChkEn-
+                        MultHdrRecCap- MultHdrRecEn- TLPPfxPres- HdrLogCap-
+                HeaderLog: 00000000 00000000 00000000 00000000
+                RootCmd: CERptEn- NFERptEn- FERptEn-
+                RootSta: CERcvd- MultCERcvd- UERcvd- MultUERcvd-
+                         FirstFatal- NonFatalMsg- FatalMsg- IntMsg 0
+                ErrorSrc: ERR_COR: 0000 ERR_FATAL/NONFATAL: 0000
+        Capabilities: [160 v2] Root Complex Event Collector Endpoint Association
+                RCiEPBitmap: RCiEP at Device(s): 1, 6, 8-10, 12, 15
+                AssociatedBusNumbers: 02-08
+00: 86 80 23 0b 00 01 10 00 00 00 07 08 00 00 00 00
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