linux-kernel - [PATCH 3/8] lspci: Decode PCIe DevCtl2 Emergency Power Reduction Request

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Message-Id: <20231018160836.1361510-4-helgaas@kernel.org>
Date:   Wed, 18 Oct 2023 11:08:31 -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 3/8] lspci: Decode PCIe DevCtl2 Emergency Power Reduction Request

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

Decode the PCIe DevCtl2 Emergency Power Reduction Request bit.

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

diff --git a/lib/header.h b/lib/header.h
index 5065465c33db..c3a720f716b7 100644
--- a/lib/header.h
+++ b/lib/header.h
@@ -906,6 +906,7 @@
 #define  PCI_EXP_DEVCTL2_IDO_REQ_EN	0x0100	/* Allow IDO for requests */
 #define  PCI_EXP_DEVCTL2_IDO_CMP_EN	0x0200	/* Allow IDO for completions */
 #define  PCI_EXP_DEVCTL2_LTR		0x0400	/* LTR enabled */
+#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_DEVSTA2			0x2a	/* Device Status */
diff --git a/ls-caps.c b/ls-caps.c
index 0c7bef976144..19c59536f948 100644
--- a/ls-caps.c
+++ b/ls-caps.c
@@ -1173,10 +1173,12 @@ static void cap_express_dev2(struct device *d, int where, int type)
         printf(" EgressBlck%c", FLAG(w, PCI_EXP_DEVCTL2_ATOMICOP_EGRESS_BLOCK));
       printf("\n");
     }
-  printf("\t\t\t IDOReq%c IDOCompl%c LTR%c 10BitTagReq%c OBFF %s\n",
+  printf("\t\t\t IDOReq%c IDOCompl%c LTR%c EmergencyPowerReductionReq%c\n",
 	FLAG(w, PCI_EXP_DEVCTL2_IDO_REQ_EN),
 	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",
 	FLAG(w, PCI_EXP_DEVCTL2_10BIT_TAG_REQ),
 	cap_express_devctl2_obff(PCI_EXP_DEVCTL2_OBFF(w)));
 }
-- 
2.34.1