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From:   Matthew Rosato <mjrosato@linux.ibm.com>
To:     linux-s390@vger.kernel.org
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        schnelle@linux.ibm.com, farman@linux.ibm.com, pmorel@linux.ibm.com,
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Subject: [PATCH v4 10/32] s390/pci: stash dtsm and maxstbl
Date:   Mon, 14 Mar 2022 15:44:29 -0400
Message-Id: <20220314194451.58266-11-mjrosato@linux.ibm.com>
In-Reply-To: <20220314194451.58266-1-mjrosato@linux.ibm.com>
References: <20220314194451.58266-1-mjrosato@linux.ibm.com>
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Store information about what IOAT designation types are supported by
underlying hardware as well as the largest store block size allowed.
These values will be needed by passthrough.

Reviewed-by: Niklas Schnelle <schnelle@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
---
 arch/s390/include/asm/pci.h     | 2 ++
 arch/s390/include/asm/pci_clp.h | 6 ++++--
 arch/s390/pci/pci_clp.c         | 2 ++
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
index d07d7c3205de..7ee52a70a96f 100644
--- a/arch/s390/include/asm/pci.h
+++ b/arch/s390/include/asm/pci.h
@@ -126,9 +126,11 @@ struct zpci_dev {
 	u32		gisa;		/* GISA designation for passthrough */
 	u16		vfn;		/* virtual function number */
 	u16		pchid;		/* physical channel ID */
+	u16		maxstbl;	/* Maximum store block size */
 	u8		pfgid;		/* function group ID */
 	u8		pft;		/* pci function type */
 	u8		port;
+	u8		dtsm;		/* Supported DT mask */
 	u8		rid_available	: 1;
 	u8		has_hp_slot	: 1;
 	u8		has_resources	: 1;
diff --git a/arch/s390/include/asm/pci_clp.h b/arch/s390/include/asm/pci_clp.h
index f3286bc5ba6e..d6189ed14f84 100644
--- a/arch/s390/include/asm/pci_clp.h
+++ b/arch/s390/include/asm/pci_clp.h
@@ -153,9 +153,11 @@ struct clp_rsp_query_pci_grp {
 	u8			:  6;
 	u8 frame		:  1;
 	u8 refresh		:  1;	/* TLB refresh mode */
-	u16 reserved2;
+	u16			:  3;
+	u16 maxstbl		: 13;	/* Maximum store block size */
 	u16 mui;
-	u16			: 16;
+	u8 dtsm;			/* Supported DT mask */
+	u8 reserved3;
 	u16 maxfaal;
 	u16			:  4;
 	u16 dnoi		: 12;
diff --git a/arch/s390/pci/pci_clp.c b/arch/s390/pci/pci_clp.c
index 4dcc37ddeeaf..dc733b58e74f 100644
--- a/arch/s390/pci/pci_clp.c
+++ b/arch/s390/pci/pci_clp.c
@@ -103,6 +103,8 @@ static void clp_store_query_pci_fngrp(struct zpci_dev *zdev,
 	zdev->max_msi = response->noi;
 	zdev->fmb_update = response->mui;
 	zdev->version = response->version;
+	zdev->maxstbl = response->maxstbl;
+	zdev->dtsm = response->dtsm;
 
 	switch (response->version) {
 	case 1:
-- 
2.27.0