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: 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>

diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
index 42a4a312a6ddff8eb344d91082b5be2ee8c703a5..4c5b8fbc207921e938b8be6ef5d56af3f30e3953 100644 (file)
--- 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 f3286bc5ba6e01183faf8aea31781def176d43ca..d6189ed14f84874ac1f135d1480377d64f6f7383 100644 (file)
--- 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 d058c83467ef2f97e05e0da30913eecc76340ab2..ee367798e388e6d62bc75c5ab6b7233afe216c60 100644 (file)
--- a/arch/s390/pci/pci_clp.c
+++ b/arch/s390/pci/pci_clp.c
@@ -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: