diff mbox series

[v2] pciutils: Add decode support for RCECs

Message ID 20200624040024.895996-1-sean.v.kelley@linux.intel.com (mailing list archive)
State Superseded, archived
Headers show
Series [v2] pciutils: Add decode support for RCECs | expand

Commit Message

Sean V Kelley June 24, 2020, 4 a.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.

Signed-off-by: Sean V Kelley <sean.v.kelley@linux.intel.com>
---
Changes since v1 [1]:

- Corrections to commit log wording/abbreviation.
- Added mention of Endpoint Association for clarity.
- Removed "Desc:" from output as not necessary.
- Removed "cap_ver" from output as redundant.
- Broke out RCiEP device numbers as a comma separated list.
(Bjorn Helgaas)

[1] https://lore.kernel.org/linux-pci/20200622230330.799259-1-sean.v.kelley@linux.intel.com/

Thanks,

Sean
---
 lib/header.h   |   8 +-
 ls-ecaps.c     |  50 ++++++++-
 setpci.c       |   2 +-
 tests/cap-rcec | 299 +++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 355 insertions(+), 4 deletions(-)
 create mode 100644 tests/cap-rcec

--
2.27.0

Comments

Bjorn Helgaas June 24, 2020, 3:57 p.m. UTC | #1 
On Tue, Jun 23, 2020 at 09:00:24PM -0700, Sean V Kelley wrote:
> 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.
> 
> Signed-off-by: Sean V Kelley <sean.v.kelley@linux.intel.com>

Looks good to me.  Minor comments below, but either way:

Reviewed-by: Bjorn Helgaas <bhelgaas@google.com>

> ---
> Changes since v1 [1]:
> 
> - Corrections to commit log wording/abbreviation.
> - Added mention of Endpoint Association for clarity.
> - Removed "Desc:" from output as not necessary.
> - Removed "cap_ver" from output as redundant.
> - Broke out RCiEP device numbers as a comma separated list.
> (Bjorn Helgaas)
> 
> [1] https://lore.kernel.org/linux-pci/20200622230330.799259-1-sean.v.kelley@linux.intel.com/
> 
> Thanks,
> 
> Sean
> ---
>  lib/header.h   |   8 +-
>  ls-ecaps.c     |  50 ++++++++-
>  setpci.c       |   2 +-
>  tests/cap-rcec | 299 +++++++++++++++++++++++++++++++++++++++++++++++++
>  4 files changed, 355 insertions(+), 4 deletions(-)
>  create mode 100644 tests/cap-rcec
> 
> 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..ae26393 100644
> --- a/ls-ecaps.c
> +++ b/ls-ecaps.c
> @@ -634,6 +634,52 @@ 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 dev=0;
> +      int prevmatched=0;
> +      printf("RCiEP at Device(s):");
> +      while (bmap)
> +        {
> +	  if (BITS(bmap, 0, 1))
> +	      if (!prevmatched)
> +	        {
> +		  prevmatched=1;
> +		  printf(" %u", dev);
> +	        }
> +	      else
> +	          printf("%s %u", (prevmatched) ? "," : "", dev);

Maybe this could be done in one printf?

  if (bmap)
    {
      int prevmatched = 0;

      for (dev = 0; dev < 32; dev++)
	if (BITS(bmap, dev, 1))
	  {
	    printf("%s%u", prevmatched ? ", " : "", dev);
	    prevmatched = 1;
	  }
    }

> +	  bmap >>= 1;
> +	  dev += 1;
> +        }
> +    }
> +  else
> +    printf("00000000");

Or "[none]", with "00000000 [none]" for the "-vvv" case?  Seems like an
RCEC with no associated devices wouldn't be very useful.  Although I
guess it could have devices on other buses.

> +  printf("\n");
> +
> +  if (cap_ver < PCI_RCEC_BUSN_REG_VER)
> +    return;
> +
> +  u32 busn = get_conf_long(d, where + PCI_RCEC_BUSN_REG);
> +  printf("\t\tRCECLastBus=%02x RCECFirstBus=%02x\n",
> +    BITS(busn, 16, 8),
> +    BITS(busn, 8, 8));

The spec term is "RCEC *Next* Bus", not "RCEC First Bus".

Maybe print these in the "Next Last" order so it comes out like a bus
number range when enabled?

The example below ("RCECLastBus=00 RCECFirstBus=ff") is actually the
case when there are no additional bus numbers associated with this
RCEC.  show_range() handles a similar case by printing "[disabled]"
(as well as the raw numbers in the "enabled" or "verbose > 2" cases).
"[disabled]" wouldn't be quite right here, but maybe "[none]"?

Could be

  AssociatedBusNumbers: 01-07
  AssociatedBusNumbers: [none]              # -vv case
  AssociatedBusNumbers: ff-00 [none]        # -vvv case

But maybe that's applying too much interpretation.  We don't do
anything so fancy for bridge secondary/subordinate bus numbers, for
example.

> +}
> +
>  static void
>  cap_dvsec_cxl(struct device *d, int where)
>  {
> @@ -991,8 +1037,8 @@ 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..4196228
> --- /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): 0, 1, 4, 7, 8, 9, 10, 12, 13
> +                RCECLastBus=00 RCECFirstBus=ff
> +00: 86 80 23 0b 00 01 10 00 00 00 07 08 00 00 00 00
> +10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +20: 00 00 00 00 00 00 00 00 00 00 00 00 86 80 00 00
> +30: 00 00 00 00 40 00 00 00 00 00 00 00 ff 01 00 00
> +40: 10 80 a2 00 02 00 00 00 07 00 00 00 00 00 00 00
> +50: 00 00 00 00 00 00 00 00 00 00 00 00 07 00 00 00
> +60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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> +90: 05 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00
> +a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +d0: 31 6a 08 00 00 00 00 00 00 00 00 00 00 00 00 00
> +e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +100: 01 00 01 16 00 00 00 00 20 00 10 00 10 30 46 00
> +110: 00 00 00 00 00 20 00 00 00 00 00 00 00 00 00 00
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> +a90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +aa0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +ab0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +ac0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +ad0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +ae0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +af0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +b10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +b20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +b30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +b40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +b50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +b60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +b70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +b90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +ba0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +bb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +bc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +bd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +be0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +bf0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +c10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +c20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +c30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +c40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +c50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +c60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +c70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +c90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +ca0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +cb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +cc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +cd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +ce0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +cf0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +d10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +d20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +d30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +d40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +d50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +d60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +d70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +d80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +d90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +da0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +db0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +dc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +dd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +de0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +df0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +e10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +e20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +e30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +e40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +e50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +e60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +e70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +e90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +ea0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +eb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +ec0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +ed0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +ee0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +ef0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +f10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +f20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +f30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +f40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +f50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +f60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +f70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +f90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +fa0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +fb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +fc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> +ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> --
> 2.27.0
>
Sean V Kelley June 24, 2020, 7:44 p.m. UTC | #2 
On Wed, 2020-06-24 at 10:57 -0500, Bjorn Helgaas wrote:
> On Tue, Jun 23, 2020 at 09:00:24PM -0700, Sean V Kelley wrote:
> > 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.
> > 
> > Signed-off-by: Sean V Kelley <sean.v.kelley@linux.intel.com>
> 
> Looks good to me.  Minor comments below, but either way:
> 
> Reviewed-by: Bjorn Helgaas <bhelgaas@google.com>
> 
> > ---
> > Changes since v1 [1]:
> > 
> > - Corrections to commit log wording/abbreviation.
> > - Added mention of Endpoint Association for clarity.
> > - Removed "Desc:" from output as not necessary.
> > - Removed "cap_ver" from output as redundant.
> > - Broke out RCiEP device numbers as a comma separated list.
> > (Bjorn Helgaas)
> > 
> > [1] 
> > https://lore.kernel.org/linux-pci/20200622230330.799259-1-sean.v.kelley@linux.intel.com/
> > 
> > Thanks,
> > 
> > Sean
> > ---
> >  lib/header.h   |   8 +-
> >  ls-ecaps.c     |  50 ++++++++-
> >  setpci.c       |   2 +-
> >  tests/cap-rcec | 299
> > +++++++++++++++++++++++++++++++++++++++++++++++++
> >  4 files changed, 355 insertions(+), 4 deletions(-)
> >  create mode 100644 tests/cap-rcec
> > 
> > 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..ae26393 100644
> > --- a/ls-ecaps.c
> > +++ b/ls-ecaps.c
> > @@ -634,6 +634,52 @@ 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 dev=0;
> > +      int prevmatched=0;
> > +      printf("RCiEP at Device(s):");
> > +      while (bmap)
> > +        {
> > +	  if (BITS(bmap, 0, 1))
> > +	      if (!prevmatched)
> > +	        {
> > +		  prevmatched=1;
> > +		  printf(" %u", dev);
> > +	        }
> > +	      else
> > +	          printf("%s %u", (prevmatched) ? "," : "", dev);
> 
> Maybe this could be done in one printf?
> 
>   if (bmap)
>     {
>       int prevmatched = 0;
> 
>       for (dev = 0; dev < 32; dev++)
> 	if (BITS(bmap, dev, 1))
> 	  {
> 	    printf("%s%u", prevmatched ? ", " : "", dev);
> 	    prevmatched = 1;
> 	  }
>     }


That works well, I can also add the hyphen if it is adjacent with this,
I think:

for (int dev=0; dev < 32; dev++)
   {
     if (BITS(bmap, dev, 1))
       {
         if (!adjcount)
           printf("%s %u", (prevmatched) ? "," : "", dev);
         prevmatched=1;
         adjcount++;
         prevdev=dev;
       }
     else
       {
         if (adjcount > 1)
           printf("-%u", prevdev);
         adjacent=0;
       }
   }



> > +	  bmap >>= 1;
> > +	  dev += 1;
> > +        }
> > +    }
> > +  else
> > +    printf("00000000");
> 
> Or "[none]", with "00000000 [none]" for the "-vvv" case?  Seems like
> an
> RCEC with no associated devices wouldn't be very useful.  Although I
> guess it could have devices on other buses.
> 

It's more informative to note that it really means "none".  Will do.

> > +  printf("\n");
> > +
> > +  if (cap_ver < PCI_RCEC_BUSN_REG_VER)
> > +    return;
> > +
> > +  u32 busn = get_conf_long(d, where + PCI_RCEC_BUSN_REG);
> > +  printf("\t\tRCECLastBus=%02x RCECFirstBus=%02x\n",
> > +    BITS(busn, 16, 8),
> > +    BITS(busn, 8, 8));
> 
> The spec term is "RCEC *Next* Bus", not "RCEC First Bus".
> 
> Maybe print these in the "Next Last" order so it comes out like a bus
> number range when enabled?

Good catch, I'm not sure where I was getting First...

And I think the bus number range with Next Last order makes sense.
> 
> The example below ("RCECLastBus=00 RCECFirstBus=ff") is actually the
> case when there are no additional bus numbers associated with this
> RCEC.  show_range() handles a similar case by printing "[disabled]"
> (as well as the raw numbers in the "enabled" or "verbose > 2" cases).
> "[disabled]" wouldn't be quite right here, but maybe "[none]"?
> 
> Could be
> 
>   AssociatedBusNumbers: 01-07
>   AssociatedBusNumbers: [none]              # -vv case
>   AssociatedBusNumbers: ff-00 [none]        # -vvv case

No one seems to use 'verbose' very effectively for individual caps in
ls-ecaps, afaict.  It's either on/off so to speak.  I really like this
granularity, however.  I'll have a look.

Thanks,

Sean

> 
> But maybe that's applying too much interpretation.  We don't do
> anything so fancy for bridge secondary/subordinate bus numbers, for
> example.
> 
> > +}
> > +
> >  static void
> >  cap_dvsec_cxl(struct device *d, int where)
> >  {
> > @@ -991,8 +1037,8 @@ 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..4196228
> > --- /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): 0, 1, 4, 7, 8, 9,
> > 10, 12, 13
> > +                RCECLastBus=00 RCECFirstBus=ff
> > +00: 86 80 23 0b 00 01 10 00 00 00 07 08 00 00 00 00
> > +10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +20: 00 00 00 00 00 00 00 00 00 00 00 00 86 80 00 00
> > +30: 00 00 00 00 40 00 00 00 00 00 00 00 ff 01 00 00
> > +40: 10 80 a2 00 02 00 00 00 07 00 00 00 00 00 00 00
> > +50: 00 00 00 00 00 00 00 00 00 00 00 00 07 00 00 00
> > +60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +80: 01 90 03 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +90: 05 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00
> > +a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +d0: 31 6a 08 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +100: 01 00 01 16 00 00 00 00 20 00 10 00 10 30 46 00
> > +110: 00 00 00 00 00 20 00 00 00 00 00 00 00 00 00 00
> > +120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +160: 07 00 02 00 00 00 00 00 00 ff 00 00 00 00 00 00
> > +170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +190: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +1a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +1b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +1c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +1d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +1e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +1f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +210: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +220: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +230: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +240: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +250: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +260: 00 00 00 00 07 00 00 00 00 00 00 00 00 00 00 00
> > +270: 00 00 00 00 00 00 00 00 07 00 00 00 00 00 00 00
> > +280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +290: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +2a0: 00 00 00 00 00 00 00 00 20 00 18 00 20 00 18 00
> > +2b0: 20 00 18 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +2c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +2d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +2e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +2f0: 00 20 00 00 00 20 00 00 00 20 00 00 00 e0 00 00
> > +300: 00 e0 00 00 00 e0 00 00 00 e0 00 00 00 e0 00 00
> > +310: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +320: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +330: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +340: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +350: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +360: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +370: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +390: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +3a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +3b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +3c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +3d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +3e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +3f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +410: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +420: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +430: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +440: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +450: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +460: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +470: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +490: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +4a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +4b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +4c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +4d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +4e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +4f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +510: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +520: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +530: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +540: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +550: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +560: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +570: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +590: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +5a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +5b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +5c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +5d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +5e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +5f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +600: 44 00 00 00 91 00 00 00 00 00 00 00 00 00 00 00
> > +610: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +620: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +630: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +640: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +650: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +660: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +670: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +680: 90 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +690: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +6a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +6b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +6c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +6d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +6e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +6f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +710: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +720: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +730: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +740: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +750: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +770: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +7a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +7b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +7c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +7d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +7e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +7f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +810: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +820: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +830: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +840: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +850: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +860: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +870: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +890: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +8a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +8b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +8c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +8d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +8e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +8f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +910: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +920: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +930: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +940: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +950: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +960: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +970: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +990: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +9a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +9b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +9c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +9d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +9e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +9f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +a10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +a20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +a30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +a40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +a50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +a60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +a70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +a90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +aa0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +ab0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +ac0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +ad0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +ae0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +af0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +b10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +b20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +b30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +b40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +b50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +b60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +b70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +b90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +ba0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +bb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +bc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +bd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +be0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +bf0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +c10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +c20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +c30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +c40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +c50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +c60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +c70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +c90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +ca0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +cb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +cc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +cd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +ce0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +cf0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +d10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +d20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +d30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +d40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +d50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +d60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +d70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +d80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +d90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +da0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +db0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +dc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +dd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +de0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +df0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +e10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +e20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +e30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +e40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +e50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +e60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +e70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +e90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +ea0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +eb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +ec0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +ed0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +ee0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +ef0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +f10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +f20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +f30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +f40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +f50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +f60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +f70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +f90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +fa0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +fb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +fc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > +ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > --
> > 2.27.0
> >
Sean V Kelley June 24, 2020, 7:51 p.m. UTC | #3 
On Wed, 2020-06-24 at 12:44 -0700, Sean V Kelley wrote:
> That works well, I can also add the hyphen if it is adjacent with
> this,
> I think:
> 
> for (int dev=0; dev < 32; dev++)
>    {
>      if (BITS(bmap, dev, 1))
>        {
>          if (!adjcount)
>            printf("%s %u", (prevmatched) ? "," : "", dev);
>          prevmatched=1;
>          adjcount++;
>          prevdev=dev;
>        }
>      else
>        {
>          if (adjcount > 1)
>            printf("-%u", prevdev);
>          adjacent=0;

Rather, I meant:
adjcount=0; 

>        }
>    }
> 
>
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..ae26393 100644
--- a/ls-ecaps.c
+++ b/ls-ecaps.c
@@ -634,6 +634,52 @@  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 dev=0;
+      int prevmatched=0;
+      printf("RCiEP at Device(s):");
+      while (bmap)
+        {
+	  if (BITS(bmap, 0, 1))
+	      if (!prevmatched)
+	        {
+		  prevmatched=1;
+		  printf(" %u", dev);
+	        }
+	      else
+	          printf("%s %u", (prevmatched) ? "," : "", dev);
+	  bmap >>= 1;
+	  dev += 1;
+        }
+    }
+  else
+    printf("00000000");
+  printf("\n");
+
+  if (cap_ver < PCI_RCEC_BUSN_REG_VER)
+    return;
+
+  u32 busn = get_conf_long(d, where + PCI_RCEC_BUSN_REG);
+  printf("\t\tRCECLastBus=%02x RCECFirstBus=%02x\n",
+    BITS(busn, 16, 8),
+    BITS(busn, 8, 8));
+}
+
 static void
 cap_dvsec_cxl(struct device *d, int where)
 {
@@ -991,8 +1037,8 @@  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..4196228
--- /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): 0, 1, 4, 7, 8, 9, 10, 12, 13
+                RCECLastBus=00 RCECFirstBus=ff
+00: 86 80 23 0b 00 01 10 00 00 00 07 08 00 00 00 00
+10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+20: 00 00 00 00 00 00 00 00 00 00 00 00 86 80 00 00
+30: 00 00 00 00 40 00 00 00 00 00 00 00 ff 01 00 00
+40: 10 80 a2 00 02 00 00 00 07 00 00 00 00 00 00 00
+50: 00 00 00 00 00 00 00 00 00 00 00 00 07 00 00 00
+60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+80: 01 90 03 00 00 00 00 00 00 00 00 00 00 00 00 00
+90: 05 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00
+a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+d0: 31 6a 08 00 00 00 00 00 00 00 00 00 00 00 00 00
+e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+100: 01 00 01 16 00 00 00 00 20 00 10 00 10 30 46 00
+110: 00 00 00 00 00 20 00 00 00 00 00 00 00 00 00 00
+120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+160: 07 00 02 00 00 00 00 00 00 ff 00 00 00 00 00 00
+170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+190: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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