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author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-18 09:24:01 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-18 09:24:01 -0800 |
commit | 53861af9a17022898619a2ae4ead0dfc601b7c13 (patch) | |
tree | dc11088d9e86fa1d8d8479974864153a8f976897 /arch/s390 | |
parent | 5c2770079fb9b8c5bfb7113d9e76de66e77a0e24 (diff) | |
parent | 5b40a7daf51812b35cf05d1601a779a7043f8414 (diff) | |
download | linux-stable-53861af9a17022898619a2ae4ead0dfc601b7c13.tar.gz linux-stable-53861af9a17022898619a2ae4ead0dfc601b7c13.tar.bz2 linux-stable-53861af9a17022898619a2ae4ead0dfc601b7c13.zip |
Merge tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux
Pull virtio updates from Rusty Russell:
"OK, this has the big virtio 1.0 implementation, as specified by OASIS.
On top of tht is the major rework of lguest, to use PCI and virtio
1.0, to double-check the implementation.
Then comes the inevitable fixes and cleanups from that work"
* tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: (80 commits)
virtio: don't set VIRTIO_CONFIG_S_DRIVER_OK twice.
virtio_net: unconditionally define struct virtio_net_hdr_v1.
tools/lguest: don't use legacy definitions for net device in example launcher.
virtio: Don't expose legacy net features when VIRTIO_NET_NO_LEGACY defined.
tools/lguest: use common error macros in the example launcher.
tools/lguest: give virtqueues names for better error messages
tools/lguest: more documentation and checking of virtio 1.0 compliance.
lguest: don't look in console features to find emerg_wr.
tools/lguest: don't start devices until DRIVER_OK status set.
tools/lguest: handle indirect partway through chain.
tools/lguest: insert driver references from the 1.0 spec (4.1 Virtio Over PCI)
tools/lguest: insert device references from the 1.0 spec (4.1 Virtio Over PCI)
tools/lguest: rename virtio_pci_cfg_cap field to match spec.
tools/lguest: fix features_accepted logic in example launcher.
tools/lguest: handle device reset correctly in example launcher.
virtual: Documentation: simplify and generalize paravirt_ops.txt
lguest: remove NOTIFY call and eventfd facility.
lguest: remove NOTIFY facility from demonstration launcher.
lguest: use the PCI console device's emerg_wr for early boot messages.
lguest: always put console in PCI slot #1.
...
Diffstat (limited to 'arch/s390')
-rw-r--r-- | arch/s390/include/asm/pci_io.h | 1 | ||||
-rw-r--r-- | arch/s390/pci/pci.c | 34 |
2 files changed, 28 insertions, 7 deletions
diff --git a/arch/s390/include/asm/pci_io.h b/arch/s390/include/asm/pci_io.h index f664e96f48c7..1a9a98de5bde 100644 --- a/arch/s390/include/asm/pci_io.h +++ b/arch/s390/include/asm/pci_io.h @@ -16,6 +16,7 @@ struct zpci_iomap_entry { u32 fh; u8 bar; + u16 count; }; extern struct zpci_iomap_entry *zpci_iomap_start; diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c index 3290f11ae1d9..753a56731951 100644 --- a/arch/s390/pci/pci.c +++ b/arch/s390/pci/pci.c @@ -259,7 +259,10 @@ void __iowrite64_copy(void __iomem *to, const void *from, size_t count) } /* Create a virtual mapping cookie for a PCI BAR */ -void __iomem *pci_iomap(struct pci_dev *pdev, int bar, unsigned long max) +void __iomem *pci_iomap_range(struct pci_dev *pdev, + int bar, + unsigned long offset, + unsigned long max) { struct zpci_dev *zdev = get_zdev(pdev); u64 addr; @@ -270,14 +273,27 @@ void __iomem *pci_iomap(struct pci_dev *pdev, int bar, unsigned long max) idx = zdev->bars[bar].map_idx; spin_lock(&zpci_iomap_lock); - zpci_iomap_start[idx].fh = zdev->fh; - zpci_iomap_start[idx].bar = bar; + if (zpci_iomap_start[idx].count++) { + BUG_ON(zpci_iomap_start[idx].fh != zdev->fh || + zpci_iomap_start[idx].bar != bar); + } else { + zpci_iomap_start[idx].fh = zdev->fh; + zpci_iomap_start[idx].bar = bar; + } + /* Detect overrun */ + BUG_ON(!zpci_iomap_start[idx].count); spin_unlock(&zpci_iomap_lock); addr = ZPCI_IOMAP_ADDR_BASE | ((u64) idx << 48); - return (void __iomem *) addr; + return (void __iomem *) addr + offset; } -EXPORT_SYMBOL_GPL(pci_iomap); +EXPORT_SYMBOL_GPL(pci_iomap_range); + +void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) +{ + return pci_iomap_range(dev, bar, 0, maxlen); +} +EXPORT_SYMBOL(pci_iomap); void pci_iounmap(struct pci_dev *pdev, void __iomem *addr) { @@ -285,8 +301,12 @@ void pci_iounmap(struct pci_dev *pdev, void __iomem *addr) idx = (((__force u64) addr) & ~ZPCI_IOMAP_ADDR_BASE) >> 48; spin_lock(&zpci_iomap_lock); - zpci_iomap_start[idx].fh = 0; - zpci_iomap_start[idx].bar = 0; + /* Detect underrun */ + BUG_ON(!zpci_iomap_start[idx].count); + if (!--zpci_iomap_start[idx].count) { + zpci_iomap_start[idx].fh = 0; + zpci_iomap_start[idx].bar = 0; + } spin_unlock(&zpci_iomap_lock); } EXPORT_SYMBOL_GPL(pci_iounmap); |