- 15 Nov, 2019 1 commit
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Chuhong Yuan authored
The driver calls release_resource in remove to match request_mem_region in probe, which is incorrect. Fix it by using the right one, release_mem_region. Signed-off-by:
Chuhong Yuan <hslester96@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 30 May, 2019 1 commit
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Thomas Gleixner authored
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Reviewed-by:
Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 29 Apr, 2019 1 commit
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Arnd Bergmann authored
The header file is the only thing preventing us from building the driver in a cross-platform configuration, so move the structure we are interested in to the global platform_data location and enable compile testing. Acked-by:
Alexander Sverdlin <alexander.sverdlin@gmail.com> Acked-by:
H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Signed-off-by:
Olof Johansson <olof@lixom.net>
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- 22 Sep, 2018 1 commit
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YueHaibing authored
The method ndo_start_xmit() is defined as returning an 'netdev_tx_t', which is a typedef for an enum type, so make sure the implementation in this driver has returns 'netdev_tx_t' value, and change the function return type to netdev_tx_t. Found by coccinelle. Signed-off-by:
YueHaibing <yuehaibing@huawei.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 05 Jun, 2017 1 commit
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yuval.shaia@oracle.com authored
Make return value void since functions never returns meaningfull value. Signed-off-by:
Yuval Shaia <yuval.shaia@oracle.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 05 Feb, 2017 1 commit
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Eric Dumazet authored
Use napi_complete_done() instead of __napi_complete() to : 1) Get support of gro_flush_timeout if opt-in 2) Not rearm interrupts for busy-polling users. 3) use standard NAPI API. 4) get rid of baroque code and ease maintenance. Signed-off-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 18 Dec, 2016 1 commit
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Philippe Reynes authored
The ethtool api {get|set}_settings is deprecated. We move this driver to new api {get|set}_link_ksettings. Signed-off-by:
Philippe Reynes <tremyfr@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 05 Dec, 2016 1 commit
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Florian Fainelli authored
When we unload the ep93xx_eth, whether we have opened the network interface or not, we will either hit a kernel paging request error, or a simple NULL pointer de-reference because: - if ep93xx_open has been called, we have created a valid DMA mapping for ep->descs, when we call ep93xx_stop, we also call ep93xx_free_buffers, ep->descs now has a stale value - if ep93xx_open has not been called, we have a NULL pointer for ep->descs, so performing any operation against that address just won't work Fix this by adding a NULL pointer check for ep->descs which means that ep93xx_free_buffers() was able to successfully tear down the descriptors and free the DMA cookie as well. Fixes: 1d22e05d ("[PATCH] Cirrus Logic ep93xx ethernet driver") Signed-off-by:
Florian Fainelli <f.fainelli@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 13 Oct, 2016 1 commit
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Jarod Wilson authored
With centralized MTU checking, there's nothing productive done by eth_change_mtu that isn't already done in dev_set_mtu, so mark it as deprecated and remove all usage of it in the kernel. All callers have been audited for calls to alloc_etherdev* or ether_setup directly, which means they all have a valid dev->min_mtu and dev->max_mtu. Now eth_change_mtu prints out a netdev_warn about being deprecated, for the benefit of out-of-tree drivers that might be utilizing it. Of note, dvb_net.c actually had dev->mtu = 4096, while using eth_change_mtu, meaning that if you ever tried changing it's mtu, you couldn't set it above 1500 anymore. It's now getting dev->max_mtu also set to 4096 to remedy that. v2: fix up lantiq_etop, missed breakage due to drive not compiling on x86 CC: netdev@vger.kernel.org Signed-off-by:
Jarod Wilson <jarod@redhat.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 05 Feb, 2015 1 commit
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Markus Elfring authored
The kfree() function tests whether its argument is NULL and then returns immediately. Thus the test around the call is not needed. This issue was detected by using the Coccinelle software. Signed-off-by:
Markus Elfring <elfring@users.sourceforge.net> Signed-off-by:
H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 20 Oct, 2014 1 commit
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Wolfram Sang authored
A platform_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by:
Wolfram Sang <wsa@the-dreams.de>
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- 16 Jan, 2014 1 commit
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Paul Gortmaker authored
None of these files are actually using any __init type directives and hence don't need to include <linux/init.h>. Most are just a left over from __devinit and __cpuinit removal, or simply due to code getting copied from one driver to the next. This covers everything under drivers/net except for wireless, which has been submitted separately. Signed-off-by:
Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 30 Aug, 2013 1 commit
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Jingoo Han authored
Use the wrapper function for retrieving the platform data instead of accessing dev->platform_data directly. This is a cosmetic change to make the code simpler and enhance the readability. Signed-off-by:
Jingoo Han <jg1.han@samsung.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 28 May, 2013 1 commit
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Jingoo Han authored
The driver core clears the driver data to NULL after device_release or on probe failure, since commit 0998d063 (device-core: Ensure drvdata = NULL when no driver is bound). Thus, it is not needed to manually clear the device driver data to NULL. Signed-off-by:
Jingoo Han <jg1.han@samsung.com> Acked-by:
Nicolas Ferre <nicolas.ferre@atmel.com> Acked-by:
Rob Herring <rob.herring@calxeda.com> Acked-by:
Roland Stigge <stigge@antcom.de> Acked-by:
Mugunthan V N <mugunthanvnm@ti.com> Reviewed-by:
H Hartley Sweeten <hsweeten@visionengravers.com> Tested-by:
Roland Stigge <stigge@antcom.de> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 18 Mar, 2013 1 commit
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Sachin Kamat authored
module_platform_driver macro removes some boilerplate and makes the code simpler. Signed-off-by:
Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 07 Jan, 2013 1 commit
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Jiri Pirko authored
Use strlcpy where possible to ensure the string is \0 terminated. Use always sizeof(string) instead of 32, ETHTOOL_BUSINFO_LEN and custom defines. Use snprintf instead of sprint. Remove unnecessary inits of ->fw_version Remove unnecessary inits of drvinfo struct. Signed-off-by:
Jiri Pirko <jiri@resnulli.us> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 15 Feb, 2012 1 commit
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Danny Kukawka authored
Replace usage of random_ether_addr() with eth_hw_addr_random() to set addr_assign_type correctly to NET_ADDR_RANDOM. Change the trivial cases. v2: adapt to renamed eth_hw_addr_random() Signed-off-by:
Danny Kukawka <danny.kukawka@bisect.de> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 06 Feb, 2012 1 commit
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Pradeep A Dalvi authored
Replaced deprecating dev_alloc_skb with netdev_alloc_skb in drivers/net/ethernet - Removed extra skb->dev = dev after netdev_alloc_skb Signed-off-by:
Pradeep A Dalvi <netdev@pradeepdalvi.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 12 Aug, 2011 1 commit
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Jeff Kirsher authored
Move the Cirrus Ethernet driver into drivers/net/ethernet/cirrus/ and make the necessary Kconfig and Makefile changes CC: Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by:
Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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- 11 Jun, 2011 4 commits
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Mika Westerberg authored
Russell King said: > > So, to summarize what its doing: > > 1. It allocates buffers for rx and tx. > 2. It maps them with dma_map_single(). > This transfers ownership of the buffer to the DMA device. > 3. In ep93xx_xmit, > 3a. It copies the data into the buffer with skb_copy_and_csum_dev() > This violates the DMA buffer ownership rules - the CPU should > not be writing to this buffer while it is (in principle) owned > by the DMA device. > 3b. It then calls dma_sync_single_for_cpu() for the buffer. > This transfers ownership of the buffer to the CPU, which surely > is the wrong direction. > 4. In ep93xx_rx, > 4a. It calls dma_sync_single_for_cpu() for the buffer. > This at least transfers the DMA buffer ownership to the CPU > before the CPU reads the buffer > 4b. It then uses skb_copy_to_linear_data() to copy the data out. > At no point does it transfer ownership back to the DMA device. > 5. When the driver is removed, it dma_unmap_single()'s the buffer. > This transfers ownership of the buffer to the CPU. > 6. It frees the buffer. > > While it may work on ep93xx, it's not respecting the DMA API rules, > and with DMA debugging enabled it will probably encounter quite a few > warnings. This patch fixes these violations. Signed-off-by:
Mika Westerberg <mika.westerberg@iki.fi> Acked-by:
Russell King <rmk+kernel@arm.linux.org.uk> Acked-by:
H Hartley Sweeten <hsweeten@visionengravers.com> Tested-by:
Petr Stetiar <ynezz@true.cz> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Mika Westerberg authored
Commit a197b59a (mm: fail GFP_DMA allocations when ZONE_DMA is not configured) made page allocator to return NULL if GFP_DMA is set but CONFIG_ZONE_DMA is disabled. This causes ep93xx_eth to fail: WARNING: at mm/page_alloc.c:2251 __alloc_pages_nodemask+0x11c/0x638() Modules linked in: [<c0035498>] (unwind_backtrace+0x0/0xf4) from [<c0043da4>] (warn_slowpath_common+0x48/0x60) [<c0043da4>] (warn_slowpath_common+0x48/0x60) from [<c0043dd8>] (warn_slowpath_null+0x1c/0x24) [<c0043dd8>] (warn_slowpath_null+0x1c/0x24) from [<c0083b6c>] (__alloc_pages_nodemask+0x11c/0x638) [<c0083b6c>] (__alloc_pages_nodemask+0x11c/0x638) from [<c00366fc>] (__dma_alloc+0x8c/0x3ec) [<c00366fc>] (__dma_alloc+0x8c/0x3ec) from [<c0036adc>] (dma_alloc_coherent+0x54/0x60) [<c0036adc>] (dma_alloc_coherent+0x54/0x60) from [<c0227808>] (ep93xx_open+0x20/0x864) [<c0227808>] (ep93xx_open+0x20/0x864) from [<c0283144>] (__dev_open+0xb8/0x108) [<c0283144>] (__dev_open+0xb8/0x108) from [<c0280528>] (__dev_change_flags+0x70/0x128) [<c0280528>] (__dev_change_flags+0x70/0x128) from [<c0283054>] (dev_change_flags+0x10/0x48) [<c0283054>] (dev_change_flags+0x10/0x48) from [<c001a720>] (ip_auto_config+0x190/0xf68) [<c001a720>] (ip_auto_config+0x190/0xf68) from [<c00233b0>] (do_one_initcall+0x34/0x18c) [<c00233b0>] (do_one_initcall+0x34/0x18c) from [<c0008400>] (kernel_init+0x94/0x134) [<c0008400>] (kernel_init+0x94/0x134) from [<c0030858>] (kernel_thread_exit+0x0/0x8) Since there is no restrictions for DMA on ep93xx, we can fix this by just removing the GFP_DMA flag from the call. Signed-off-by:
Mika Westerberg <mika.westerberg@iki.fi> Acked-by:
Russell King <rmk+kernel@arm.linux.org.uk> Acked-by:
H Hartley Sweeten <hsweeten@visionengravers.com> Tested-by:
Petr Stetiar <ynezz@true.cz> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Mika Westerberg authored
We can use simply kmalloc() to allocate the buffers. This also simplifies the code and allows us to perform DMA sync operations more easily. Memory is allocated with only GFP_KERNEL since there are no DMA allocation restrictions on this platform. Signed-off-by:
Mika Westerberg <mika.westerberg@iki.fi> Acked-by:
Russell King <rmk+kernel@arm.linux.org.uk> Acked-by:
H Hartley Sweeten <hsweeten@visionengravers.com> Tested-by:
Petr Stetiar <ynezz@true.cz> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Mika Westerberg authored
We shouldn't use NULL for any DMA API functions, unless we are dealing with ISA or EISA device. So pass correct struct dev pointer to these functions. Signed-off-by:
Mika Westerberg <mika.westerberg@iki.fi> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 07 Jun, 2011 1 commit
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Alexey Dobriyan authored
* remove interrupt.g inclusion from netdevice.h -- not needed * fixup fallout, add interrupt.h and hardirq.h back where needed. Signed-off-by:
Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 20 Aug, 2010 1 commit
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Tobias Klauser authored
struct net_device has its own struct net_device_stats member, so use this one instead of a private copy in the ep93xx_priv struct. As the new ndo_get_stats function would just return dev->stats we can omit it. Signed-off-by:
Tobias Klauser <tklauser@distanz.ch> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 10 May, 2010 1 commit
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Eric Dumazet authored
Now that core network takes care of trans_start updates, dont do it in drivers themselves, if possible. Drivers can avoid one cache miss (on dev->trans_start) in their start_xmit() handler. Exceptions are NETIF_F_LLTX drivers Signed-off-by:
Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 04 May, 2010 1 commit
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David S. Miller authored
Receiving small packet(s) in a fast pace leads to not receiving any packets at all after some time. After ethernet packet(s) arrived the receive descriptor is incremented by the number of frames processed. If another packet arrives while processing, this is processed in another call of ep93xx_rx. This second call leads that too many receive descriptors getting released. This fix increments, even in these case, the right number of processed receive descriptors. Signed-off-by:
Stefan Agner <stefan@agner.ch> Acked-by:
Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 30 Mar, 2010 1 commit
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Tejun Heo authored
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by:
Tejun Heo <tj@kernel.org> Guess-its-ok-by:
Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
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- 08 Jan, 2010 1 commit
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H Hartley Sweeten authored
General cleanup of the ep93xx_eth driver. 1) Use pr_fmt() to prefix the module name and __func__ to the error messages. 2) <linux/io.h> instead of <asm/io.h> 3) <mach/hardware.h> instead of <mach/ep93xx-regs.h> and <mach/platform.h> 4) Move the ep93xx_mdio_read (and ep93xx_mdio_write) function to eliminate the function prototype. 5) Change all the printk(<level> messages to pr_<level> and remove the __func__ argument. 6) Use platform_get_{resource/irq} to get the platform resources and add an error check. 7) Use resource_size() for request_mem_region() and ioremap(). 8) Use %pM to print the MAC address at the end of the probe. 9) Use dev->dev_addr not data->dev_addr for the MAC argument because a random address could be used if the platform does not supply one. The message at the end of the probe is left as a printk since it displays cleaner without the function name that would be displayed with pr_info(). Signed-off-by:
H Hartley Sweeten <hsweeten@visionengravers.com> Acked-by:
Lennert Buytenhek <kernel@wantstofly.org> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 30 Nov, 2009 1 commit
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Florian Fainelli authored
If we happen to have registered the driver without passing a MAC address, we will print a zero MAC address and register the interface with this invalid address, this is confusin. This patch moves the checking of a valid ethernet address and the generation of a random one down from the open function to the probe function. Signed-off-by:
Florian Fainelli <florian@openwrt.org> Acked-by:
Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 02 Sep, 2009 1 commit
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Stephen Hemminger authored
No need to put ethtool_ops in data, they should be const. Signed-off-by:
Stephen Hemminger <shemminger@vyatta.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 29 May, 2009 1 commit
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FUJITA Tomonori authored
This replaces dma_sync_single() with dma_sync_single_for_cpu() because dma_sync_single() is an obsolete API; include/linux/dma-mapping.h says: /* Backwards compat, remove in 2.7.x */ #define dma_sync_single dma_sync_single_for_cpu #define dma_sync_sg dma_sync_sg_for_cpu Signed-off-by:
FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 16 Apr, 2009 1 commit
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Hartley Sweeten authored
Fix 50+ sparse warnings in the ep93xx ethernet driver. warning: incorrect type in argument 1 (different address spaces) Signed-off-by:
H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by:
Russell King <rmk+kernel@arm.linux.org.uk>
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- 11 Apr, 2009 1 commit
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Alexander Beregalov authored
Also make ep93xx_dev_alloc static. Signed-off-by:
Alexander Beregalov <a.beregalov@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 21 Jan, 2009 1 commit
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Ben Hutchings authored
Following the removal of the unused struct net_device * parameter from the NAPI functions named *netif_rx_* in commit 908a7a16 , they are exactly equivalent to the corresponding *napi_* functions and are therefore redundant. Signed-off-by:
Ben Hutchings <bhutchings@solarflare.com> Acked-by:
Neil Horman <nhorman@tuxdriver.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 30 Dec, 2008 1 commit
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Kamalesh Babulal authored
I hit similar build failure due to the change in the netif_rx_reschedule() drivers/net/ehea/ehea_main.c: In function 'ehea_poll': drivers/net/ehea/ehea_main.c:844: warning: passing argument 1 of 'netif_rx_reschedule' from incompatible pointer type drivers/net/ehea/ehea_main.c:844: error: too many arguments to function 'netif_rx_reschedule' make[3]: *** [drivers/net/ehea/ehea_main.o] Error 1 greping through the sources for the changes missed out, we have ./drivers/net/arm/ixp4xx_eth.c:507: netif_rx_reschedule(dev, napi)) { ./drivers/net/arm/ep93xx_eth.c:310: if (more && netif_rx_reschedule(dev, napi)) ./drivers/net/wan/ixp4xx_hss.c:657: netif_rx_reschedule(dev, napi)) { Signed-off-by:
Kamalesh Babulal <kamalesh@linux.vnet.ibm.com> Acked-by:
Neil Horman <nhorman@tuxdriver.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 23 Dec, 2008 1 commit
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Neil Horman authored
When the napi api was changed to separate its 1:1 binding to the net_device struct, the netif_rx_[prep|schedule|complete] api failed to remove the now vestigual net_device structure parameter. This patch cleans up that api by properly removing it.. Signed-off-by:
Neil Horman <nhorman@tuxdriver.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 04 Nov, 2008 1 commit
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David S. Miller authored
The generic packet receive code takes care of setting netdev->last_rx when necessary, for the sake of the bonding ARP monitor. Drivers need not do it any more. Some cases had to be skipped over because the drivers were making use of the ->last_rx value themselves. Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 07 Aug, 2008 1 commit
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Russell King authored
This just leaves include/asm-arm/plat-* to deal with. Signed-off-by:
Russell King <rmk+kernel@arm.linux.org.uk>
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- 26 Jul, 2008 1 commit
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FUJITA Tomonori authored
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>
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