Commit d1038467 authored by Matthew Rosato's avatar Matthew Rosato Committed by Christian Borntraeger
Browse files

s390/pci: stash dtsm and maxstbl 



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: default avatarNiklas Schnelle <schnelle@linux.ibm.com>
Reviewed-by: default avatarPierre Morel <pmorel@linux.ibm.com>
Reviewed-by: default avatarChristian Borntraeger <borntraeger@linux.ibm.com>
Signed-off-by: default avatarMatthew Rosato <mjrosato@linux.ibm.com>
Link: https://lore.kernel.org/r/20220606203325.110625-10-mjrosato@linux.ibm.com


Signed-off-by: default avatarChristian Borntraeger <borntraeger@linux.ibm.com>
parent c68468ed

arch/s390/include/asm/pci.h

+2 −0
Original line number Diff line number Diff line
@@ -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;

arch/s390/include/asm/pci_clp.h

+4 −2
Original line number Diff line number Diff line
@@ -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;

arch/s390/pci/pci_clp.c

+2 −0
Original line number Diff line number Diff line
@@ -106,6 +106,8 @@ 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: