From: Matthew Rosato <mjrosato@linux.ibm.com>
To: linux-s390@vger.kernel.org
Cc: alex.williamson@redhat.com, cohuck@redhat.com,
schnelle@linux.ibm.com, farman@linux.ibm.com,
pmorel@linux.ibm.com, borntraeger@linux.ibm.com,
hca@linux.ibm.com, gor@linux.ibm.com,
gerald.schaefer@linux.ibm.com, agordeev@linux.ibm.com,
frankja@linux.ibm.com, david@redhat.com, imbrenda@linux.ibm.com,
vneethv@linux.ibm.com, oberpar@linux.ibm.com,
freude@linux.ibm.com, thuth@redhat.com, pasic@linux.ibm.com,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v3 13/30] s390/pci: return status from zpci_refresh_trans
Date: Fri, 4 Feb 2022 16:15:19 -0500 [thread overview]
Message-ID: <20220204211536.321475-14-mjrosato@linux.ibm.com> (raw)
In-Reply-To: <20220204211536.321475-1-mjrosato@linux.ibm.com>
Current callers of zpci_refresh_trans don't need to interrogate the status
returned from the underlying instructions. However, a subsequent patch
will add a KVM caller that needs this information. Add a new argument to
zpci_refresh_trans to pass the address of a status byte and update
existing call sites to provide it.
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
---
arch/s390/include/asm/pci_insn.h | 2 +-
arch/s390/pci/pci_dma.c | 6 ++++--
arch/s390/pci/pci_insn.c | 10 +++++-----
drivers/iommu/s390-iommu.c | 4 +++-
4 files changed, 13 insertions(+), 9 deletions(-)
diff --git a/arch/s390/include/asm/pci_insn.h b/arch/s390/include/asm/pci_insn.h
index 5331082fa516..32759c407b8f 100644
--- a/arch/s390/include/asm/pci_insn.h
+++ b/arch/s390/include/asm/pci_insn.h
@@ -135,7 +135,7 @@ union zpci_sic_iib {
DECLARE_STATIC_KEY_FALSE(have_mio);
u8 zpci_mod_fc(u64 req, struct zpci_fib *fib, u8 *status);
-int zpci_refresh_trans(u64 fn, u64 addr, u64 range);
+int zpci_refresh_trans(u64 fn, u64 addr, u64 range, u8 *status);
int __zpci_load(u64 *data, u64 req, u64 offset);
int zpci_load(u64 *data, const volatile void __iomem *addr, unsigned long len);
int __zpci_store(u64 data, u64 req, u64 offset);
diff --git a/arch/s390/pci/pci_dma.c b/arch/s390/pci/pci_dma.c
index a81de48d5ea7..b0a2380bcad8 100644
--- a/arch/s390/pci/pci_dma.c
+++ b/arch/s390/pci/pci_dma.c
@@ -23,8 +23,9 @@ static u32 s390_iommu_aperture_factor = 1;
static int zpci_refresh_global(struct zpci_dev *zdev)
{
+ u8 status;
return zpci_refresh_trans((u64) zdev->fh << 32, zdev->start_dma,
- zdev->iommu_pages * PAGE_SIZE);
+ zdev->iommu_pages * PAGE_SIZE, &status);
}
unsigned long *dma_alloc_cpu_table(void)
@@ -183,6 +184,7 @@ static int __dma_purge_tlb(struct zpci_dev *zdev, dma_addr_t dma_addr,
size_t size, int flags)
{
unsigned long irqflags;
+ u8 status;
int ret;
/*
@@ -201,7 +203,7 @@ static int __dma_purge_tlb(struct zpci_dev *zdev, dma_addr_t dma_addr,
}
ret = zpci_refresh_trans((u64) zdev->fh << 32, dma_addr,
- PAGE_ALIGN(size));
+ PAGE_ALIGN(size), &status);
if (ret == -ENOMEM && !s390_iommu_strict) {
/* enable the hypervisor to free some resources */
if (zpci_refresh_global(zdev))
diff --git a/arch/s390/pci/pci_insn.c b/arch/s390/pci/pci_insn.c
index 0509554301c7..ca6399d52767 100644
--- a/arch/s390/pci/pci_insn.c
+++ b/arch/s390/pci/pci_insn.c
@@ -77,20 +77,20 @@ static inline u8 __rpcit(u64 fn, u64 addr, u64 range, u8 *status)
return cc;
}
-int zpci_refresh_trans(u64 fn, u64 addr, u64 range)
+int zpci_refresh_trans(u64 fn, u64 addr, u64 range, u8 *status)
{
- u8 cc, status;
+ u8 cc;
do {
- cc = __rpcit(fn, addr, range, &status);
+ cc = __rpcit(fn, addr, range, status);
if (cc == 2)
udelay(ZPCI_INSN_BUSY_DELAY);
} while (cc == 2);
if (cc)
- zpci_err_insn(cc, status, addr, range);
+ zpci_err_insn(cc, *status, addr, range);
- if (cc == 1 && (status == 4 || status == 16))
+ if (cc == 1 && (*status == 4 || *status == 16))
return -ENOMEM;
return (cc) ? -EIO : 0;
diff --git a/drivers/iommu/s390-iommu.c b/drivers/iommu/s390-iommu.c
index 50860ebdd087..845bb99c183e 100644
--- a/drivers/iommu/s390-iommu.c
+++ b/drivers/iommu/s390-iommu.c
@@ -214,6 +214,7 @@ static int s390_iommu_update_trans(struct s390_domain *s390_domain,
unsigned long irq_flags, nr_pages, i;
unsigned long *entry;
int rc = 0;
+ u8 status;
if (dma_addr < s390_domain->domain.geometry.aperture_start ||
dma_addr + size > s390_domain->domain.geometry.aperture_end)
@@ -238,7 +239,8 @@ static int s390_iommu_update_trans(struct s390_domain *s390_domain,
spin_lock(&s390_domain->list_lock);
list_for_each_entry(domain_device, &s390_domain->devices, list) {
rc = zpci_refresh_trans((u64) domain_device->zdev->fh << 32,
- start_dma_addr, nr_pages * PAGE_SIZE);
+ start_dma_addr, nr_pages * PAGE_SIZE,
+ &status);
if (rc)
break;
}
--
2.27.0
next prev parent reply other threads:[~2022-02-04 21:16 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-04 21:15 [PATCH v3 00/30] KVM: s390: enable zPCI for interpretive execution Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 01/30] s390/sclp: detect the zPCI load/store interpretation facility Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 02/30] s390/sclp: detect the AISII facility Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 03/30] s390/sclp: detect the AENI facility Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 04/30] s390/sclp: detect the AISI facility Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 05/30] s390/airq: pass more TPI info to airq handlers Matthew Rosato
2022-02-07 8:28 ` Cornelia Huck
2022-02-04 21:15 ` [PATCH v3 06/30] s390/airq: allow for airq structure that uses an input vector Matthew Rosato
2022-02-07 8:29 ` Cornelia Huck
2022-02-07 8:42 ` Claudio Imbrenda
2022-02-04 21:15 ` [PATCH v3 07/30] s390/pci: externalize the SIC operation controls and routine Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 08/30] s390/pci: stash associated GISA designation Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 09/30] s390/pci: export some routines related to RPCIT processing Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 10/30] s390/pci: stash dtsm and maxstbl Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 11/30] s390/pci: add helper function to find device by handle Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 12/30] s390/pci: get SHM information from list pci Matthew Rosato
2022-02-07 10:08 ` Pierre Morel
2022-02-04 21:15 ` Matthew Rosato [this message]
2022-02-04 21:15 ` [PATCH v3 14/30] vfio/pci: re-introduce CONFIG_VFIO_PCI_ZDEV Matthew Rosato
2022-02-07 8:35 ` Cornelia Huck
2022-02-07 15:43 ` Matthew Rosato
2022-02-07 17:59 ` Cornelia Huck
2022-02-07 20:09 ` Matthew Rosato
2022-02-10 10:07 ` Cornelia Huck
2022-02-04 21:15 ` [PATCH v3 15/30] KVM: s390: pci: add basic kvm_zdev structure Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 16/30] KVM: s390: pci: do initial setup for AEN interpretation Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 17/30] KVM: s390: pci: enable host forwarding of Adapter Event Notifications Matthew Rosato
2022-02-14 12:59 ` Pierre Morel
2022-02-14 20:35 ` Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 18/30] KVM: s390: mechanism to enable guest zPCI Interpretation Matthew Rosato
2022-02-14 13:06 ` Pierre Morel
2022-02-04 21:15 ` [PATCH v3 19/30] KVM: s390: pci: provide routines for enabling/disabling interpretation Matthew Rosato
2022-02-14 13:22 ` Pierre Morel
2022-02-04 21:15 ` [PATCH v3 20/30] KVM: s390: pci: provide routines for enabling/disabling interrupt forwarding Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 21/30] KVM: s390: pci: provide routines for enabling/disabling IOAT assist Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 22/30] KVM: s390: pci: handle refresh of PCI translations Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 23/30] KVM: s390: intercept the rpcit instruction Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 24/30] vfio-pci/zdev: wire up group notifier Matthew Rosato
2022-02-08 17:43 ` Alex Williamson
2022-02-08 18:51 ` Jason Gunthorpe
2022-02-08 19:26 ` Alex Williamson
2022-02-08 19:51 ` Jason Gunthorpe
2022-02-08 20:33 ` Matthew Rosato
2022-02-08 20:40 ` Jason Gunthorpe
2022-02-08 21:37 ` Matthew Rosato
2022-02-10 11:15 ` Niklas Schnelle
2022-02-10 13:01 ` Jason Gunthorpe
2022-02-10 14:06 ` Niklas Schnelle
2022-02-10 15:23 ` Jason Gunthorpe
2022-02-10 18:59 ` Matthew Rosato
2022-02-10 23:45 ` Jason Gunthorpe
2022-02-04 21:15 ` [PATCH v3 25/30] vfio-pci/zdev: wire up zPCI interpretive execution support Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 26/30] vfio-pci/zdev: wire up zPCI adapter interrupt forwarding support Matthew Rosato
2022-02-07 16:38 ` Pierre Morel
2022-02-04 21:15 ` [PATCH v3 27/30] vfio-pci/zdev: wire up zPCI IOAT assist support Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 28/30] vfio-pci/zdev: add DTSM to clp group capability Matthew Rosato
2022-02-04 21:15 ` [PATCH v3 29/30] KVM: s390: introduce CPU feature for zPCI Interpretation Matthew Rosato
2022-02-07 16:36 ` Pierre Morel
2022-02-04 21:15 ` [PATCH v3 30/30] MAINTAINERS: additional files related kvm s390 pci passthrough Matthew Rosato
2022-02-07 13:04 ` Christian Borntraeger
2022-02-07 15:44 ` Matthew Rosato
2022-02-04 21:33 ` [PATCH v3 00/30] KVM: s390: enable zPCI for interpretive execution Matthew Rosato
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