[v1] First batch of misc (i386, kernel-doc, memory, vl.c) changes for QEMU 6.0

[PULL 014/113] pci: Let pci_dma_write() propagate MemTxResult

Paolo Bonzini posted 113 patches 5 years, 2 months ago

Diff against v2 v2
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Maintainers: Radoslaw Biernacki <rad@semihalf.com>, Igor Mammedov <imammedo@redhat.com>, Richard Henderson <richard.henderson@linaro.org>, Michael Rolnik <mrolnik@gmail.com>, Tyrone Ting <kfting@nuvoton.com>, "Daniel P. Berrangé" <berrange@redhat.com>, "Cédric Le Goater" <clg@kaod.org>, Sunil Muthuswamy <sunilmut@microsoft.com>, Aurelien Jarno <aurelien@aurel32.net>, Halil Pasic <pasic@linux.ibm.com>, Rob Herring <robh@kernel.org>, Alexander Bulekov <alxndr@bu.edu>, Sarah Harris <S.E.Harris@kent.ac.uk>, Sagar Karandikar <sagark@eecs.berkeley.edu>, Alistair Francis <alistair@alistair23.me>, David Hildenbrand <david@redhat.com>, BALATON Zoltan <balaton@eik.bme.hu>, Andrew Jeffery <andrew@aj.id.au>, "Michael S. Tsirkin" <mst@redhat.com>, Antony Pavlov <antonynpavlov@gmail.com>, Stefano Stabellini <sstabellini@kernel.org>, Laszlo Ersek <lersek@redhat.com>, Leif Lindholm <leif@nuviainc.com>, Juan Quintela <quintela@redhat.com>, Cornelia Huck <cohuck@redhat.com>, David Gibson <david@gibson.dropbear.id.au>, "Edgar E. Iglesias" <edgar.iglesias@gmail.com>, Stefan Hajnoczi <stefanha@redhat.com>, Laurent Vivier <laurent@vivier.eu>, Jiaxun Yang <jiaxun.yang@flygoat.com>, Bandan Das <bsd@redhat.com>, "Dr. David Alan Gilbert" <dgilbert@redhat.com>, Michael Walle <michael@walle.cc>, Artyom Tarasenko <atar4qemu@gmail.com>, Markus Armbruster <armbru@redhat.com>, Havard Skinnemoen <hskinnemoen@google.com>, Gerd Hoffmann <kraxel@redhat.com>, Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>, Peter Maydell <peter.maydell@linaro.org>, Cleber Rosa <crosa@redhat.com>, "Philippe Mathieu-Daudé" <f4bug@amsat.org>, Palmer Dabbelt <palmer@dabbelt.com>, Anthony Perard <anthony.perard@citrix.com>, "Hervé Poussineau" <hpoussin@reactos.org>, Fabien Chouteau <chouteau@adacore.com>, Paul Durrant <paul@xen.org>, Joel Stanley <joel@jms.id.au>, Bastian Koppelmann <kbastian@mail.uni-paderborn.de>, Helge Deller <deller@gmx.de>, Paolo Bonzini <pbonzini@redhat.com>, Thomas Huth <thuth@redhat.com>, Marcelo Tosatti <mtosatti@redhat.com>, Chris Wulff <crwulff@gmail.com>, Thomas Huth <huth@tuxfamily.org>, Marek Vasut <marex@denx.de>, Huacai Chen <chenhc@lemote.com>, Alistair Francis <Alistair.Francis@wdc.com>, John Snow <jsnow@redhat.com>, Eduardo Habkost <ehabkost@redhat.com>, Laurent Vivier <lvivier@redhat.com>, Andrzej Zaborowski <balrogg@gmail.com>, Aleksandar Rikalo <aleksandar.rikalo@syrmia.com>, Christian Borntraeger <borntraeger@de.ibm.com>, KONRAD Frederic <frederic.konrad@adacore.com>

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[PULL 014/113] pci: Let pci_dma_write() propagate MemTxResult

Posted by Paolo Bonzini 5 years, 2 months ago

From: Philippe Mathieu-Daudé <philmd@redhat.com>

pci_dma_rw() returns a MemTxResult type.
Do not discard it, return it to the caller.

Reviewed-by: Li Qiang <liq3ea@gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20201023151923.3243652-11-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 include/hw/pci/pci.h | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index a2de236eeb..259f9c992d 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -819,8 +819,20 @@ static inline MemTxResult pci_dma_read(PCIDevice *dev, dma_addr_t addr,
     return pci_dma_rw(dev, addr, buf, len, DMA_DIRECTION_TO_DEVICE);
 }
 
-static inline int pci_dma_write(PCIDevice *dev, dma_addr_t addr,
-                                const void *buf, dma_addr_t len)
+/**
+ * pci_dma_write: Write to address space from PCI device.
+ *
+ * Return a MemTxResult indicating whether the operation succeeded
+ * or failed (eg unassigned memory, device rejected the transaction,
+ * IOMMU fault).
+ *
+ * @dev: #PCIDevice doing the memory access
+ * @addr: address within the #PCIDevice address space
+ * @buf: buffer with the data transferred
+ * @len: the number of bytes to write
+ */
+static inline MemTxResult pci_dma_write(PCIDevice *dev, dma_addr_t addr,
+                                        const void *buf, dma_addr_t len)
 {
     return pci_dma_rw(dev, addr, (void *) buf, len, DMA_DIRECTION_FROM_DEVICE);
 }
-- 
2.26.2