linux/net
FUJITA Tomonori 8d8bb39b9e dma-mapping: add the device argument to dma_mapping_error()
Add per-device dma_mapping_ops support for CONFIG_X86_64 as POWER
architecture does:

This enables us to cleanly fix the Calgary IOMMU issue that some devices
are not behind the IOMMU (http://lkml.org/lkml/2008/5/8/423).

I think that per-device dma_mapping_ops support would be also helpful for
KVM people to support PCI passthrough but Andi thinks that this makes it
difficult to support the PCI passthrough (see the above thread).  So I
CC'ed this to KVM camp.  Comments are appreciated.

A pointer to dma_mapping_ops to struct dev_archdata is added.  If the
pointer is non NULL, DMA operations in asm/dma-mapping.h use it.  If it's
NULL, the system-wide dma_ops pointer is used as before.

If it's useful for KVM people, I plan to implement a mechanism to register
a hook called when a new pci (or dma capable) device is created (it works
with hot plugging).  It enables IOMMUs to set up an appropriate
dma_mapping_ops per device.

The major obstacle is that dma_mapping_error doesn't take a pointer to the
device unlike other DMA operations.  So x86 can't have dma_mapping_ops per
device.  Note all the POWER IOMMUs use the same dma_mapping_error function
so this is not a problem for POWER but x86 IOMMUs use different
dma_mapping_error functions.

The first patch adds the device argument to dma_mapping_error.  The patch
is trivial but large since it touches lots of drivers and dma-mapping.h in
all the architecture.

This patch:

dma_mapping_error() doesn't take a pointer to the device unlike other DMA
operations.  So we can't have dma_mapping_ops per device.

Note that POWER already has dma_mapping_ops per device but all the POWER
IOMMUs use the same dma_mapping_error function.  x86 IOMMUs use device
argument.

[akpm@linux-foundation.org: fix sge]
[akpm@linux-foundation.org: fix svc_rdma]
[akpm@linux-foundation.org: build fix]
[akpm@linux-foundation.org: fix bnx2x]
[akpm@linux-foundation.org: fix s2io]
[akpm@linux-foundation.org: fix pasemi_mac]
[akpm@linux-foundation.org: fix sdhci]
[akpm@linux-foundation.org: build fix]
[akpm@linux-foundation.org: fix sparc]
[akpm@linux-foundation.org: fix ibmvscsi]
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Muli Ben-Yehuda <muli@il.ibm.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Avi Kivity <avi@qumranet.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-26 12:00:03 -07:00
..
9p flag parameters: socket and socketpair 2008-07-24 10:47:27 -07:00
802 list_for_each_rcu must die: networking 2008-07-25 10:53:27 -07:00
8021q netdev: Handle ->addr_list_lock just like ->_xmit_lock for lockdep. 2008-07-22 14:16:42 -07:00
appletalk netns: Use net_eq() to compare net-namespaces for optimization. 2008-07-19 22:34:43 -07:00
atm netns: Use net_eq() to compare net-namespaces for optimization. 2008-07-19 22:34:43 -07:00
ax25 netns: Use net_eq() to compare net-namespaces for optimization. 2008-07-19 22:34:43 -07:00
bluetooth bluetooth: remove improper bluetooth class symlinks. 2008-07-21 21:54:51 -07:00
bridge netns: Use net_eq() to compare net-namespaces for optimization. 2008-07-19 22:34:43 -07:00
can netns: Use net_eq() to compare net-namespaces for optimization. 2008-07-19 22:34:43 -07:00
core printk ratelimiting rewrite 2008-07-25 10:53:29 -07:00
dccp mib: add net to NET_INC_STATS_BH 2008-07-16 20:31:16 -07:00
decnet netns: Use net_eq() to compare net-namespaces for optimization. 2008-07-19 22:34:43 -07:00
econet netns: Use net_eq() to compare net-namespaces for optimization. 2008-07-19 22:34:43 -07:00
ethernet [NET]: Return more appropriate error from eth_validate_addr(). 2008-04-13 22:45:40 -07:00
ieee80211 wext: Emit event stream entries correctly when compat. 2008-06-16 18:50:49 -07:00
ipv4 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-07-25 17:40:16 -07:00
ipv6 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-07-25 17:40:16 -07:00
ipx netns: Use net_eq() to compare net-namespaces for optimization. 2008-07-19 22:34:43 -07:00
irda Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-07-20 17:43:29 -07:00
iucv Merge branch 'linus' into cpus4096-for-linus 2008-07-21 17:19:50 +02:00
key Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2008-06-13 20:52:39 -07:00
lapb [LAPB] net/lapb/lapb_iface.c: use LIST_HEAD instead of LIST_HEAD_INIT 2008-01-28 14:56:52 -08:00
llc netns: Use net_eq() to compare net-namespaces for optimization. 2008-07-19 22:34:43 -07:00
mac80211 net_sched: Add qdisc_enqueue wrapper 2008-07-20 00:08:04 -07:00
netfilter netfilter: nf_conntrack_sctp: fix sparse warnings 2008-07-21 10:11:02 -07:00
netlabel netns: Use net_eq() to compare net-namespaces for optimization. 2008-07-19 22:34:43 -07:00
netlink Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2008-07-05 23:08:07 -07:00
netrom netdev: Handle ->addr_list_lock just like ->_xmit_lock for lockdep. 2008-07-22 14:16:42 -07:00
packet netns: Use net_eq() to compare net-namespaces for optimization. 2008-07-19 22:34:43 -07:00
rfkill rfkill: ignore errors from rfkill_toggle_radio in rfkill_add_switch 2008-07-08 14:16:03 -04:00
rose netdev: Handle ->addr_list_lock just like ->_xmit_lock for lockdep. 2008-07-22 14:16:42 -07:00
rxrpc MIB: add struct net to UDP_INC_STATS_BH 2008-07-05 21:18:48 -07:00
sched pkt_sched: Fix locking in shutdown_scheduler_queue() 2008-07-25 01:25:04 -07:00
sctp flag parameters: socket and socketpair 2008-07-24 10:47:27 -07:00
sunrpc dma-mapping: add the device argument to dma_mapping_error() 2008-07-26 12:00:03 -07:00
tipc netns: Use net_eq() to compare net-namespaces for optimization. 2008-07-19 22:34:43 -07:00
unix Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2008-06-28 01:19:40 -07:00
wanrouter net: Remove references to wan-router.txt in Kconfigs 2008-07-14 22:22:29 -07:00
wireless netns: Use net_eq() to compare net-namespaces for optimization. 2008-07-19 22:34:43 -07:00
x25 netns: Use net_eq() to compare net-namespaces for optimization. 2008-07-19 22:34:43 -07:00
xfrm ipsec: ipcomp - Decompress into frags if necessary 2008-07-25 02:55:33 -07:00
compat.c flag parameters: paccept 2008-07-24 10:47:27 -07:00
Kconfig net: Add STP demux layer 2008-07-05 21:25:39 -07:00
Makefile vlan: uninline __vlan_hwaccel_rx 2008-07-08 03:23:36 -07:00
nonet.c
socket.c flag parameters: check magic constants 2008-07-24 10:47:29 -07:00
sysctl_net.c sysctl: allow override of /proc/sys/net with CAP_NET_ADMIN 2008-07-25 10:53:45 -07:00
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