diff options
| author | Keshavamurthy, Anil S <anil.s.keshavamurthy@intel.com> | 2007-10-21 16:41:55 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-22 08:13:19 -0700 |
| commit | e820482cd2621dba60e403af1c54502daa54b220 (patch) | |
| tree | 3498401c7154e14008ab80b2f0cbca539ce7ffbc /drivers/pci | |
| parent | 3460a6d9cef9ac2aa997da7eff7ff1c8291b361c (diff) | |
| download | lwn-e820482cd2621dba60e403af1c54502daa54b220.tar.gz lwn-e820482cd2621dba60e403af1c54502daa54b220.zip | |
Intel IOMMU: Iommu Gfx workaround
When we fix all the opensource gfx drivers to use the DMA api's, at that time
we can yank this config options out.
[jengelh@computergmbh.de: Kconfig fixes]
Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Muli Ben-Yehuda <muli@il.ibm.com>
Cc: "Siddha, Suresh B" <suresh.b.siddha@intel.com>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Jan Engelhardt <jengelh@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/intel-iommu.c | 33 | ||||
| -rw-r--r-- | drivers/pci/intel-iommu.h | 7 |
2 files changed, 40 insertions, 0 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c index 358dd406fe21..4905e0e3a644 100644 --- a/drivers/pci/intel-iommu.c +++ b/drivers/pci/intel-iommu.c @@ -1602,6 +1602,36 @@ static inline int iommu_prepare_rmrr_dev(struct dmar_rmrr_unit *rmrr, rmrr->end_address + 1); } +#ifdef CONFIG_DMAR_GFX_WA +extern int arch_get_ram_range(int slot, u64 *addr, u64 *size); +static void __init iommu_prepare_gfx_mapping(void) +{ + struct pci_dev *pdev = NULL; + u64 base, size; + int slot; + int ret; + + for_each_pci_dev(pdev) { + if (pdev->sysdata == DUMMY_DEVICE_DOMAIN_INFO || + !IS_GFX_DEVICE(pdev)) + continue; + printk(KERN_INFO "IOMMU: gfx device %s 1-1 mapping\n", + pci_name(pdev)); + slot = arch_get_ram_range(0, &base, &size); + while (slot >= 0) { + ret = iommu_prepare_identity_map(pdev, + base, base + size); + if (ret) + goto error; + slot = arch_get_ram_range(slot, &base, &size); + } + continue; +error: + printk(KERN_ERR "IOMMU: mapping reserved region failed\n"); + } +} +#endif + int __init init_dmars(void) { struct dmar_drhd_unit *drhd; @@ -1665,6 +1695,8 @@ int __init init_dmars(void) } } + iommu_prepare_gfx_mapping(); + /* * for each drhd * enable fault log @@ -2176,3 +2208,4 @@ int __init intel_iommu_init(void) dma_ops = &intel_dma_ops; return 0; } + diff --git a/drivers/pci/intel-iommu.h b/drivers/pci/intel-iommu.h index 71dda6b56ffa..ee88dd2400cb 100644 --- a/drivers/pci/intel-iommu.h +++ b/drivers/pci/intel-iommu.h @@ -315,4 +315,11 @@ struct intel_iommu { struct sys_device sysdev; }; +#ifndef CONFIG_DMAR_GFX_WA +static inline void iommu_prepare_gfx_mapping(void) +{ + return; +} +#endif /* !CONFIG_DMAR_GFX_WA */ + #endif |