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s390/pci: stash dtsm and maxstbl

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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>
Link: https://lore.kernel.org/r/20220606203325.110625-10-mjrosato@linux.ibm.com
Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>
This commit is contained in:
Matthew Rosato 2022-06-06 16:33:13 -04:00 committed by Christian Borntraeger
parent c68468ed34
commit d103846776
3 changed files with 8 additions and 2 deletions
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2
arch/s390/include/asm/pci.h
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@ -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;

6
arch/s390/include/asm/pci_clp.h
View file

@ -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;

2
arch/s390/pci/pci_clp.c
View file

@ -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: