- 23 7月, 2008 4 次提交
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由 Roland Dreier 提交于
Add support for the following operations to mlx4 when device firmware supports them: - Send with invalidate and local invalidate send queue work requests; - Allocate/free fast register MRs; - Allocate/free fast register MR page lists; - Fast register MR send queue work requests; - Local DMA L_Key. Signed-off-by: NRoland Dreier <rolandd@cisco.com>
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由 Roland Dreier 提交于
MTT entries are allocated with a buddy allocator, which just keeps bitmaps for each level of the buddy table. However, all free space starts out at the highest order, and small allocations start scanning from the lowest order. When the lowest order tables have no free space, this can lead to scanning potentially millions of bits before finding a free entry at a higher order. We can avoid this by just keeping a count of how many free entries each order has, and skipping the bitmap scan when an order is completely empty. This provides a nice performance boost for a negligible increase in memory usage. Signed-off-by: NRoland Dreier <rolandd@cisco.com>
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由 Jack Morgenstein 提交于
Add ICM_ERROR firmware status code. In mapping to errnos, -ENFILE seems closest. This is in preparation for providing more detailed log info using mlx4_err() in low-level driver when a non-zero status is returned. Signed-off-by: NJack Morgenstein <jackm@dev.mellanox.co.il> Signed-off-by: NRoland Dreier <rolandd@cisco.com>
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由 Jack Morgenstein 提交于
Add a module parameter "enable_qos" to mlx4_core. If this param is set, enable support for QoS in the INIT_HCA command. By default, the parameter is set to 0 (disabled). Signed-off-by: NJack Morgenstein <jackm@dev.mellanox.co.il> Signed-off-by: NRoland Dreier <rolandd@cisco.com>
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- 22 7月, 2008 1 次提交
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由 Micah Dowty 提交于
This is a trivial patch against the hdlcdrv module that fixes its CRC calculation. The finished CRC was overwriting the first two bytes of each packet rather than being appended to the end. I've tested this with 2.6.8 and 2.6.10-rc1, but hdlcdrv hasn't changed much recently so it should work with many other kernel versions. Signed-off-by: NMicah Dowty <micah@navi.cx> Acked-by: NThomas Sailer <t.sailer@alumni.ethz.ch> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 21 7月, 2008 8 次提交
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由 David S. Miller 提交于
Based upon a bug report by Alexander Beregalov and commentary from Ben Hutchings. These are totally unnecessary, in particular because this driver's ->hard_start_xmit() handler takes the same driver spinlock that the set-multicast-list handler uses. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Anton Vorontsov 提交于
If the net queue has not been started, we'll get this nice oops and non-working ethernet: ------------[ cut here ]------------ Kernel BUG at c01f4648 [verbose debug info unavailable] Oops: Exception in kernel mode, sig: 5 [#1] MPC836x RDK Modules linked in: NIP: c01f4648 LR: c01c0a10 CTR: c01c08e4 REGS: cf839e40 TRAP: 0700 Not tainted (2.6.26-05254-gc7b9969) MSR: 00021032 <ME,IR,DR> CR: 22042044 XER: 00000000 TASK = cf828c30[4] 'events/0' THREAD: cf838000 GPR00: c01c0a10 cf839ef0 cf828c30 c035ceb0 cf8469a0 00000064 00000000 00000000 GPR08: c035ceb0 00000001 00000001 cf99c280 22044044 7ca81020 0fffc000 00000000 GPR16: 0fff2544 0fff63c0 00000000 0fff78e0 0ffa5580 00000004 00000000 00000000 GPR24: 02082000 cf9d0000 d1068000 00009032 cf846800 cf846b80 00000001 00000014 NIP [c01f4648] __netif_schedule+0x28/0x8c LR [c01c0a10] adjust_link+0x12c/0x1e4 Call Trace: [cf839ef0] [c0380f50] 0xc0380f50 (unreliable) [cf839f10] [c01c0a10] adjust_link+0x12c/0x1e4 [cf839f40] [c01c2628] phy_state_machine+0x2e0/0x448 [cf839f60] [c00425e8] run_workqueue+0xc8/0x168 [cf839f90] [c0042c6c] worker_thread+0x70/0xd0 [cf839fd0] [c0046954] kthread+0x48/0x84 [cf839ff0] [c0012488] kernel_thread+0x44/0x60 Instruction dump: 7c0803a6 4e800020 3d20c036 9421ffe0 7c0802a6 7c681b78 3929ceb0 7c694a78 7d290034 90010024 bfa10014 5529d97e <0f090000> 39600002 38030024 7d200028 ---[ end trace a57d367843bd2904 ]--- Since the driver is using phylib (which is doing netif_carrier_on/off()), we should simply remove netif_tx_schedule_all() from adjust_link(). Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Anton Vorontsov 提交于
If the net queue has not been started, we'll get this nice oops and non-working ethernet: PHY: 0:01 - Link is Up - 1000/Full ------------[ cut here ]------------ kernel BUG at net/core/dev.c:1328! Oops: Exception in kernel mode, sig: 5 [#1] MPC837x RDB Modules linked in: NIP: c02544a0 LR: c01a17d0 CTR: c01a16ac REGS: cf837e40 TRAP: 0700 Not tainted (2.6.26-05253-g14b395e3) MSR: 00021032 <ME,IR,DR> CR: 22042044 XER: 00000000 TASK = cf819400[5] 'events/0' THREAD: cf836000 GPR00: c01a17d0 cf837ef0 cf819400 c03d8d08 cf8469a0 00000064 00000000 00000000 GPR08: c03d8d08 00000001 00000001 cf899ba0 22044044 00000000 0fffd000 00000000 GPR16: 0fff3028 0fff6cf0 00000000 0fff8390 0ff494a0 00000004 00000000 00000000 GPR24: c0361a00 00001058 cf9f6600 00009032 cf846800 cf846b80 00000001 00000014 NIP [c02544a0] __netif_schedule+0x28/0x8c LR [c01a17d0] adjust_link+0x124/0x1cc Call Trace: [cf837ef0] [c03fb3a0] 0xc03fb3a0 (unreliable) [cf837f10] [c01a17d0] adjust_link+0x124/0x1cc [cf837f40] [c01a8e28] phy_state_machine+0x2e0/0x448 [cf837f60] [c0040254] run_workqueue+0xc8/0x168 [cf837f90] [c00408d8] worker_thread+0x70/0xd0 [cf837fd0] [c0044630] kthread+0x48/0x84 [cf837ff0] [c0012610] kernel_thread+0x44/0x60 Instruction dump: 7c0803a6 4e800020 3d20c03e 9421ffe0 7c0802a6 7c681b78 39298d08 7c694a78 7d290034 90010024 bfa10014 5529d97e <0f090000> 39600002 38030024 7d200028 ---[ end trace 13dfd73ee42d0c30 ]--- Since the driver is using phylib (which is doing netif_carrier_on/off()), we should simply remove netif_tx_schedule_all() from adjust_link(). Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
Based upon a bug report by Alexey Dobriyan, the patch is also tested by him and confirmed to fix the problem. Packet flow during link state events should not be done by waking and stopping the TX queue anyways, that is handled transparently by netif_carrier_{on,off}(). So, remove the netif_{wake,stop}_queue() calls in the link check code, and add the necessary netif_start_queue() call to atl1_up(). Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Geert Uytterhoeven 提交于
Looking at older kernel sources the APOLLO_ELPLUS option was added somewhere during kernel 2.1, but even kernel 2.2.0 does not contain any driver that would be enabled through it... Reported-by: NRobert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: NAdrian Bunk <bunk@kernel.org> Signed-off-by: NGeert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Paulius Zaleckas 提交于
Use net_device_stats from net_device structure instead of local. Signed-off-by: NPaulius Zaleckas <paulius.zaleckas@teltonika.lt> Signed-off-by: NGeert Uytterhoeven <geert@linux-m68k.org> Acked-by: NJeff Garzik <jgarzik@redhat.com> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Alan Cox 提交于
Signed-off-by: NAlan Cox <alan@redhat.com> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Alan Cox 提交于
Move the line disciplines towards a conventional ->ops arrangement. For the moment the actual 'tty_ldisc' struct in the tty is kept as part of the tty struct but this can then be changed if it turns out that when it all settles down we want to refcount ldiscs separately to the tty. Pull the ldisc code out of /proc and put it with our ldisc code. Signed-off-by: NAlan Cox <alan@redhat.com> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 19 7月, 2008 5 次提交
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由 Benjamin Li 提交于
Signed-off-by: NBenjamin Li <benli@broadcom.com> Signed-off-by: NMichael Chan <mchan@broadcom.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Benjamin Li 提交于
This patch will fix the following sparse warnings: /home/benli/sparse/bnx2.c:297:8: warning: symbol 'val' shadows an earlier one /home/benli/sparse/bnx2.c:286:60: originally declared here /home/benli/sparse/bnx2.c:7461:7: warning: symbol 'i' shadows an earlier one /home/benli/sparse/bnx2.c:7265:10: originally declared here Signed-off-by: NBenjamin Li <benli@broadcom.com> Signed-off-by: NMichael Chan <mchan@broadcom.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Benjamin Li 提交于
Signed-off-by: NBenjamin Li <benli@broadcom.com> Signed-off-by: NMichael Chan <mchan@broadcom.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Benjamin Li 提交于
This change allows the first TX ring (CID 16) and the first TSS TX ring (CID 32) to be used concurrently. Before this change, we could get TSO errors when both TX rings were used concurrently. Signed-off-by: NBenjamin Li <benli@broadcom.com> Signed-off-by: NMichael Chan <mchan@broadcom.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Ben Hutchings 提交于
With the recent changes to tx mutiqueue, e1000 was not calling netif_start_queue() before calling netif_wake_queue(). This causes an oops during loading of the driver. (Based on commit d55b53ff ("igb/ixgbe/e1000e: resolve tx multiqueue bug").) Signed-off-by: NBen Hutchings <bhutchings@solarflare.com> Acked-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 18 7月, 2008 12 次提交
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由 Jeff Kirsher 提交于
With the recent changes to tx mutiqueue, igb/ixgbe/e1000e was not calling netif_tx_start_all_queues() before calling netif_tx_wake_all_queues(). This causes an issue during loading of the driver. In addition, updated e1000e to use the updated tx mutliqueue api. Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
This reverts commit 94d98424. Alan says it's not appropriate to remove this driver, Adrian Bunk also agrees with this revert. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
We can simply use the qdisc->q.lock for all of the qdisc tree synchronization. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
They logically all want to trigger a schedule for all device TX queues. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
The private area of a netdev is now at a fixed offset once more. Unfortunately, some assumptions that netdev_priv() == netdev->priv crept back into the tree. In particular this happened in the loopback driver. Make it use netdev->ml_priv. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
This effectively "flips the switch" by making the core networking and multiqueue-aware drivers use the new TX multiqueue structures. Non-multiqueue drivers need no changes. The interfaces they use such as netif_stop_queue() degenerate into an operation on TX queue zero. So everything "just works" for them. Code that really wants to do "X" to all TX queues now invokes a routine that does so, such as netif_tx_wake_all_queues(), netif_tx_stop_all_queues(), etc. pktgen and netpoll required a little bit more surgery than the others. In particular the pktgen changes, whilst functional, could be largely improved. The initial check in pktgen_xmit() will sometimes check the wrong queue, which is mostly harmless. The thing to do is probably to invoke fill_packet() earlier. The bulk of the netpoll changes is to make the code operate solely on the TX queue indicated by by the SKB queue mapping. Setting of the SKB queue mapping is entirely confined inside of net/core/dev.c:dev_pick_tx(). If we end up needing any kind of special semantics (drops, for example) it will be implemented here. Finally, we now have a "real_num_tx_queues" which is where the driver indicates how many TX queues are actually active. With IGB changes from Jeff Kirsher. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
There is no need for a feature bit for something that can be tested by simply checking the TX queue count. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
alloc_netdev_mq() now allocates an array of netdev_queue structures for TX, based upon the queue_count argument. Furthermore, all accesses to the TX queues are now vectored through the netdev_get_tx_queue() and netdev_for_each_tx_queue() interfaces. This makes it easy to grep the tree for all things that want to get to a TX queue of a net device. Problem spots which are not really multiqueue aware yet, and only work with one queue, can easily be spotted by grepping for all netdev_get_tx_queue() calls that pass in a zero index. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Joel Becker 提交于
The configfs operations ->make_item() and ->make_group() currently return a new item/group. A return of NULL signifies an error. Because of this, -ENOMEM is the only return code bubbled up the stack. Multiple folks have requested the ability to return specific error codes when these operations fail. This patch adds that ability by changing the ->make_item/group() ops to return ERR_PTR() values. These errors are bubbled up appropriately. NULL returns are changed to -ENOMEM for compatibility. Also updated are the in-kernel users of configfs. This is a rework of reverted commit 11c3b792. Signed-off-by: NJoel Becker <joel.becker@oracle.com>
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由 Joel Becker 提交于
This reverts commit 11c3b792. The code will move to PTR_ERR(). Signed-off-by: NJoel Becker <joel.becker@oracle.com>
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- 17 7月, 2008 2 次提交
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由 Patrick McHardy 提交于
Currently VLAN filtering is enabled when the first VLAN is added. Obviously before that there's no point in receiving any VLAN packets. Now that we disable VLAN filtering in promiscous mode, we can keep the VLAN filters enabled the remaining time. Signed-off-by: NPatrick McHardy <kaber@trash.net> Acked-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com> Acked-by: NPeter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Patrick McHardy 提交于
As discussed in this thread: http://www.mail-archive.com/netdev@vger.kernel.org/msg53976.html promiscous mode means to disable *all* filters. Currently only unicast and multicast filtering is disabled. This patch changes all Intel drivers to also disable VLAN filtering. Signed-off-by: NPatrick McHardy <kaber@trash.net> Acked-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com> Acked-by: NPeter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 16 7月, 2008 1 次提交
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由 Isaku Yamahata 提交于
After restore on ia64 xen domain, kernel panics as follows. This patch fixes it. union skb_entry assumes sizeof(link->skb, pointer) == sizeof(list->link, unsigned). However this isn't true on ia64. So make link type unsigned long. And introduced two accesor. kernel unaligned access to 0xe0000000000000bd, ip=0xa0000001004c2ca0 xenwatch[14]: error during unaligned kernel access -1 [1] Modules linked in: Pid: 14, CPU 0, comm: xenwatch psr : 0000101008422010 ifs : 8000000000000307 ip : [<a0000001004c2ca0>] Not tainted (2.6.26-rc4xen-ia64-dirty) ip is at dev_kfree_skb_irq+0x20/0x1a0 unat: 0000000000000000 pfs : 400000000000040b rsc : 0000000000000007 rnat: 0000000000000000 bsps: 0000000000000000 pr : 000000000000a941 ldrs: 0000000000000000 ccv : 0000000000000000 fpsr: 0009804c8a70433f csd : 0000000000000000 ssd : 0000000000000000 b0 : a0000001003efb70 b6 : a000000100070e40 b7 : a000000100070e40 f6 : 1003e000000fcb75352b1 f7 : 1003e000000000014ff97 f8 : 1003e00fcb74fc3454d80 f9 : 1003e0000000080000000 f10 : 1003e0000000000001431 f11 : 1003e0000000000989680 r1 : a000000100bfcf80 r2 : e0000000000000bd r3 : 000000000000308c r8 : 0000000000000000 r9 : e00000000fc31310 r10 : a000000100a13b28 r11 : 0000000000000000 r12 : e00000000fd0fdf0 r13 : e00000000fd08000 r14 : 0000000000000000 r15 : e00000000fcc8000 r16 : 0000000000000009 r17 : e000010000104000 r18 : e000010000104000 r19 : a000000100a13b40 r20 : a0000001009c23f0 r21 : a0000001009fd4d0 r22 : 0000000000004000 r23 : 0000000000000000 r24 : fffffffffff04c10 r25 : 0000000000000002 r26 : 0000000000000000 r27 : 0000000000000000 r28 : e00000000fd08bd4 r29 : a0000001007570b8 r30 : a0000001009e5500 r31 : a0000001009e54a0 Call Trace: [<a000000100026000>] show_stack+0x40/0xa0 sp=e00000000fd0f670 bsp=e00000000fd08f68 [<a000000100026a60>] show_regs+0x9a0/0x9e0 sp=e00000000fd0f840 bsp=e00000000fd08f10 [<a000000100037680>] die+0x260/0x3a0 sp=e00000000fd0f840 bsp=e00000000fd08ec8 [<a000000100037810>] die_if_kernel+0x50/0x80 sp=e00000000fd0f840 bsp=e00000000fd08e98 [<a00000010003eb40>] ia64_handle_unaligned+0x2ea0/0x2fc0 sp=e00000000fd0f840 bsp=e00000000fd08df0 [<a00000010001ca30>] ia64_prepare_handle_unaligned+0x30/0x60 sp=e00000000fd0fa10 bsp=e00000000fd08df0 [<a00000010005d100>] paravirt_leave_kernel+0x0/0x40 sp=e00000000fd0fc20 bsp=e00000000fd08df0 [<a0000001004c2ca0>] dev_kfree_skb_irq+0x20/0x1a0 sp=e00000000fd0fdf0 bsp=e00000000fd08db8 [<a0000001003efb70>] xennet_release_tx_bufs+0xd0/0x120 sp=e00000000fd0fdf0 bsp=e00000000fd08d78 [<a0000001003f14c0>] backend_changed+0xc40/0xf80 sp=e00000000fd0fdf0 bsp=e00000000fd08d08 [<a00000010034bd50>] otherend_changed+0x190/0x1c0 sp=e00000000fd0fe00 bsp=e00000000fd08cc8 [<a000000100349530>] xenwatch_thread+0x310/0x3c0 sp=e00000000fd0fe00 bsp=e00000000fd08ca0 [<a0000001000cb040>] kthread+0xe0/0x160 sp=e00000000fd0fe30 bsp=e00000000fd08c68 [<a000000100024450>] kernel_thread_helper+0x30/0x60 sp=e00000000fd0fe30 bsp=e00000000fd08c40 [<a00000010001a8a0>] start_kernel_thread+0x20/0x40 sp=e00000000fd0fe30 bsp=e00000000fd08c40 Kernel panic - not syncing: Aiee, killing interrupt handler! Signed-off-by: NIsaku Yamahata <yamahata@valinux.co.jp> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 15 7月, 2008 7 次提交
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由 Pierre Ossman 提交于
There are a lot of crappy controllers out there that cannot handle all the request sizes that the MMC/SD/SDIO specifications require. In case the card driver can pad the data to overcome the problems, this commit adds a helper that calculates how much that padding should be. A corresponding helper is also added for SDIO, but it can also deal with all the complexities of splitting up a large transfer efficiently. Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>
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由 Johannes Berg 提交于
When I removed the special "default" meaning from the QoS parameters, I forgot to update drivers and this lead to warnings because some drivers were checking for the special values and putting in defaults. This fixes that by removing the default special-casing completely. Signed-off-by: NJohannes Berg <johannes@sipsolutions.net> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
Now that we have a specific lock to protect the network device unicast and multicast lists, remove extraneous grabs of the TX lock in cases where the code only needs address list protection. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 David S. Miller 提交于
Add netif_addr_{lock,unlock}{,_bh}() helpers. Use them to protect operations that operate on or read the network device unicast and multicast address lists. Also use them in cases where the code simply wants to block calls into the driver's ->set_rx_mode() and ->set_multicast_list() methods. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Vladimir Sokolovsky 提交于
There was a bug in some versions of the mlx4 driver in mlx4_alloc_fmr(), which hardcoded the minimum acceptable page_shift to be 12. However, new ConnectX firmware can support a minimum page_shift of 9 (log_pg_sz of 9 returned by QUERY_DEV_LIM) -- so with old drivers, ib_fmr_alloc() would fail for ULPs using the device minimum when creating FMRs. To preserve firmware compatibility with released mlx4 drivers, the firmware will continue to return 12 as before for log_page_sz in QUERY_DEV_CAP for these drivers. However, to enable new drivers to take advantage of the available smaller page size, the mlx4 driver now first sets the log_pg_sz to the device minimum by setting a log_page_sz value to 0 via the MOD_STAT_CFG command and then reading the real minimum via QUERY_DEV_CAP. Signed-off-by: NJack Morgenstein <jackm@mellanox.co.il> Signed-off-by: NVladimir Sokolovsky <vlad@mellanox.co.il> Signed-off-by: NRoland Dreier <rolandd@cisco.com>
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由 Steve Wise 提交于
Handling the zero STag in receive work request requires some extra logic in the driver: - Only set the QP_PRIV bit for kernel mode QPs. - Add a zero STag build function for recv wrs. The uP needs a PBL allocated and passed down in the recv WR so it can construct a HW PBL for the zero STag S/G entries. Note: we need to place a few restrictions on zero STag usage because of this: 1) all SGEs in a recv WR must either be zero STag or not. No mixing. 2) an individual SGE length cannot exceed 128MB for a zero-stag SGE. This should be OK since it's not really practical to allocate such a large chunk of pinned contiguous DMA mapped memory. - Add an optimized non-zero-STag recv wr format for kernel users. This is needed to optimize both zero and non-zero STag cracking in the recv path for kernel users. - Remove the iwch_ prefix from the static build functions. - Bump required FW version. Signed-off-by: NSteve Wise <swise@opengridcomputing.com>
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由 Ron Livne 提交于
Add support for handling the IB_QP_CREATE_MULTICAST_BLOCK_LOOPBACK flag by using the per-multicast group loopback blocking feature of mlx4 hardware. Signed-off-by: NRon Livne <ronli@voltaire.com> Signed-off-by: NRoland Dreier <rolandd@cisco.com>
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