linux-kernel - [PATCH 4/8] lspci: Decode PCIe DevCtl2 End-to-End TLP Prefix Blocking

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Message-Id: <20231018160836.1361510-5-helgaas@kernel.org>
Date:   Wed, 18 Oct 2023 11:08:32 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Martin Mares <mj@....cz>
Cc:     Pali Rohár <pali@...nel.org>,
        Gustavo Pimentel <Gustavo.Pimentel@...opsys.com>,
        Mateusz Nowicki <mateusz.nowicki@...idigm.com>,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        Bjorn Helgaas <bhelgaas@...gle.com>
Subject: [PATCH 4/8] lspci: Decode PCIe DevCtl2 End-to-End TLP Prefix Blocking

From: Bjorn Helgaas <bhelgaas@...gle.com>

Decode the PCIe DevCtl2 End-to-End TLP Prefix Blocking bit.  The
"EETLPPrefixBlk" format is analogous to the existing "EETLPPrefix" format
used for the corresponding DevCap2 bit.

Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
---
 lib/header.h | 1 +
 ls-caps.c    | 5 +++--
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/header.h b/lib/header.h
index c3a720f716b7..4869617641f1 100644
--- a/lib/header.h
+++ b/lib/header.h
@@ -909,6 +909,7 @@
 #define  PCI_EXP_DEVCTL2_EPR_REQ	0x0800	/* Emergency Power Reduction Request */
 #define  PCI_EXP_DEVCTL2_10BIT_TAG_REQ	0x1000 /* 10 Bit Tag Requester enabled */
 #define  PCI_EXP_DEVCTL2_OBFF(x)		(((x) >> 13) & 3) /* OBFF enabled */
+#define  PCI_EXP_DEVCTL2_EE_TLP_BLK	0x8000	/* End-End TLP Prefix Blocking */
 #define PCI_EXP_DEVSTA2			0x2a	/* Device Status */
 #define PCI_EXP_LNKCAP2			0x2c	/* Link Capabilities */
 #define  PCI_EXP_LNKCAP2_SPEED(x)	(((x) >> 1) & 0x7f)
diff --git a/ls-caps.c b/ls-caps.c
index 19c59536f948..0d333d578407 100644
--- a/ls-caps.c
+++ b/ls-caps.c
@@ -1178,9 +1178,10 @@ static void cap_express_dev2(struct device *d, int where, int type)
 	FLAG(w, PCI_EXP_DEVCTL2_IDO_CMP_EN),
 	FLAG(w, PCI_EXP_DEVCTL2_LTR),
 	FLAG(w, PCI_EXP_DEVCTL2_EPR_REQ));
-  printf("\t\t\t 10BitTagReq%c OBFF %s\n",
+  printf("\t\t\t 10BitTagReq%c OBFF %s, EETLPPrefixBlk%c\n",
 	FLAG(w, PCI_EXP_DEVCTL2_10BIT_TAG_REQ),
-	cap_express_devctl2_obff(PCI_EXP_DEVCTL2_OBFF(w)));
+	cap_express_devctl2_obff(PCI_EXP_DEVCTL2_OBFF(w)),
+	FLAG(w, PCI_EXP_DEVCTL2_EE_TLP_BLK));
 }
 
 static const char *cap_express_link2_speed_cap(int vector)
-- 
2.34.1