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From: Jason Chien <jason.chien@sifive.com>
To: qemu-devel@nongnu.org,
qemu-riscv@nongnu.org
Cc: Peter Maydell <peter.maydell@linaro.org>,
Andrey Smirnov <andrew.smirnov@gmail.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Marcel Apfelbaum <marcel.apfelbaum@gmail.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Alistair Francis <alistair.francis@wdc.com>, Bin Meng <bmeng.cn@gmail.com>,
Weiwei Li <liwei1518@gmail.com>,
Daniel Henrique Barboza <dbarboza@ventanamicro.com>,
Liu Zhiwei <zhiwei_liu@linux.alibaba.com>,
qemu-arm@nongnu.org (open list:MCIMX7D SABRE / i...),
Jason Chien <jason.chien@sifive.com>
Subject: [RFC PATCH 6/6] include/hw/pci: Send PCI dma requests with memory
attributes containing BDF
Date: Mon, 16 Dec 2024 08:48:57 +0800
Message-ID: <20241216004857.9367-7-jason.chien@sifive.com>
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In order to distinguish which PCIe device sends the request over the IOMMU,
the requester_id must be set with the BDF of the device.
Signed-off-by: Jason Chien <jason.chien@sifive.com>
---
include/hw/pci/pci_device.h | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/include/hw/pci/pci_device.h b/include/hw/pci/pci_device.h
index 8eaf0d58bb..e22d05dae8 100644
--- a/include/hw/pci/pci_device.h
+++ b/include/hw/pci/pci_device.h
@@ -263,8 +263,11 @@ static inline MemTxResult pci_dma_rw(PCIDevice *dev, d=
ma_addr_t addr,
static inline MemTxResult pci_dma_read(PCIDevice *dev, dma_addr_t addr,
void *buf, dma_addr_t len)
{
+ MemTxAttrs attrs =3D {};
+ attrs.requester_id =3D pci_requester_id(dev);
+
return pci_dma_rw(dev, addr, buf, len,
- DMA_DIRECTION_TO_DEVICE, MEMTXATTRS_UNSPECIFIED);
+ DMA_DIRECTION_TO_DEVICE, attrs);
}
=20
/**
@@ -282,8 +285,11 @@ static inline MemTxResult pci_dma_read(PCIDevice *dev,=
dma_addr_t addr,
static inline MemTxResult pci_dma_write(PCIDevice *dev, dma_addr_t addr,
const void *buf, dma_addr_t len)
{
+ MemTxAttrs attrs =3D {};
+ attrs.requester_id =3D pci_requester_id(dev);
+
return pci_dma_rw(dev, addr, (void *) buf, len,
- DMA_DIRECTION_FROM_DEVICE, MEMTXATTRS_UNSPECIFIED);
+ DMA_DIRECTION_FROM_DEVICE, attrs);
}
=20
#define PCI_DMA_DEFINE_LDST(_l, _s, _bits) \
@@ -327,8 +333,11 @@ PCI_DMA_DEFINE_LDST(q_be, q_be, 64);
static inline void *pci_dma_map(PCIDevice *dev, dma_addr_t addr,
dma_addr_t *plen, DMADirection dir)
{
+ MemTxAttrs attrs =3D {};
+ attrs.requester_id =3D pci_requester_id(dev);
+
return dma_memory_map(pci_get_address_space(dev), addr, plen, dir,
- MEMTXATTRS_UNSPECIFIED);
+ attrs);
}
=20
static inline void pci_dma_unmap(PCIDevice *dev, void *buffer, dma_addr_t =
len,
--=20
2.43.2