diff options
| author | Niklas Schnelle <schnelle@linux.ibm.com> | 2023-09-28 17:31:37 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2023-10-02 09:43:00 +0300 |
| commit | c76c067e488ccd55734c3e750799caf2c5956db6 (patch) | |
| tree | c4489302a1c2a119afcba4b54535cb4d8c65cbee /arch/s390/include/asm/pci.h | |
| parent | b6f888709a155b4e748aded93afc9fa43aaa28dd (diff) | |
| download | linux-c76c067e488ccd55734c3e750799caf2c5956db6.tar.xz | |
s390/pci: Use dma-iommu layer
While s390 already has a standard IOMMU driver and previous changes have
added I/O TLB flushing operations this driver is currently only used for
user-space PCI access such as vfio-pci. For the DMA API s390 instead
utilizes its own implementation in arch/s390/pci/pci_dma.c which drives
the same hardware and shares some code but requires a complex and
fragile hand over between DMA API and IOMMU API use of a device and
despite code sharing still leads to significant duplication and
maintenance effort. Let's utilize the common code DMAP API
implementation from drivers/iommu/dma-iommu.c instead allowing us to
get rid of arch/s390/pci/pci_dma.c.
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Link: https://lore.kernel.org/r/20230928-dma_iommu-v13-3-9e5fc4dacc36@linux.ibm.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'arch/s390/include/asm/pci.h')
| -rw-r--r-- | arch/s390/include/asm/pci.h | 7 |
1 files changed, 0 insertions, 7 deletions
diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h index b248694e0024..3f74f1cf37df 100644 --- a/arch/s390/include/asm/pci.h +++ b/arch/s390/include/asm/pci.h @@ -159,13 +159,6 @@ struct zpci_dev { unsigned long *dma_table; int tlb_refresh; - spinlock_t iommu_bitmap_lock; - unsigned long *iommu_bitmap; - unsigned long *lazy_bitmap; - unsigned long iommu_size; - unsigned long iommu_pages; - unsigned int next_bit; - struct iommu_device iommu_dev; /* IOMMU core handle */ char res_name[16]; |