- 02 Jan, 2015 10 commits
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Rickard Strandqvist authored
Removes some functions that are not used anywhere: Read_hfc32() Write_hfc32() Write_hfc16() This was partially found by using a static code analysis program called cppcheck. Signed-off-by:
Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Rickard Strandqvist authored
Remove the function smt_ifconfig() that is not used anywhere. This was partially found by using a static code analysis program called cppcheck. Signed-off-by:
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Rickard Strandqvist authored
Removes some functions that are not used anywhere: dbgi_rd_rsp3() dbgi_wr_addr3() This was partially found by using a static code analysis program called cppcheck. Signed-off-by:
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Florian Westphal authored
Not needed, only four cases: - kfree_skb (or one of its aliases). Don't need to zero, memory will be freed. - kfree_skb_partial and head was stolen: memory will be freed. - skb_morph: The skb header fields (including tc ones) will be copied over from the 'to-be-morphed' skb right after skb_release_head_state returns. - skb_segment: Same as before, all the skb header fields are copied over from the original skb right away. Signed-off-by:
Florian Westphal <fw@strlen.de> Signed-off-by:
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David S. Miller authored
Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next Johan Hedberg say: ==================== pull request: bluetooth-next 2014-12-31 Here's the first batch of bluetooth patches for 3.20. - Cleanups & fixes to ieee802154 drivers - Fix synchronization of mgmt commands with respective HCI commands - Add self-tests for LE pairing crypto functionality - Remove 'BlueFritz!' specific handling from core using a new quirk flag - Public address configuration support for ath3012 - Refactor debugfs support into a dedicated file - Initial support for LE Data Length Extension feature from Bluetooth 4.2 Please let me know if there are any issues pulling. Thanks. ==================== Signed-off-by:
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Joe Stringer authored
This results in an approximately 30% increase in throughput when handling encapsulated bulk traffic. Signed-off-by:
Joe Stringer <joestringer@nicira.com> Signed-off-by:
Jesse Gross <jesse@nicira.com> Signed-off-by:
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Jesse Gross authored
Currently the only tunnel protocol that supports GRO with encapsulated Ethernet is VXLAN. This pulls out the Ethernet code into a proper layer so that it can be used by other tunnel protocols such as GRE and Geneve. Signed-off-by:
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Shaohui Xie authored
There is no need to set the clock speed in read/write which will be performed unnecessarily for each mdio access. Init it during probe is enough. Also, the hardcoded clock value is not a proper way for all SoCs. Signed-off-by:
Shaohui Xie <Shaohui.Xie@freescale.com> Signed-off-by:
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Shaohui Xie authored
Which is wrong and not used, so no extra space needed by mdiobus_alloc_size(), use mdiobus_alloc() instead. Signed-off-by:
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Shaohui Xie authored
Since the reset is just clock setting, individual mdio reset is not available. Signed-off-by:
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- 01 Jan, 2015 7 commits
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David S. Miller authored
Roger Chen says: ==================== support GMAC driver for RK3288 Roger Chen (6): patch1: add driver for Rockchip RK3288 SoCs integrated GMAC patch2: define clock ID used for GMAC patch3: modify CRU config for Rockchip RK3288 SoCs integrated GMAC patch4: dts: rockchip: add gmac info for rk3288 patch5: dts: rockchip: enable gmac on RK3288 evb board patch6: add document for Rockchip RK3288 GMAC Tested on rk3288 evb board: Execute the following command to enable ethernet, set local IP and ping a remote host. busybox ifconfig eth0 up busybox ifconfig eth0 192.168.1.111 ping 192.168.1.1 ==================== Signed-off-by: -
Roger Chen authored
The document descripts how to add properties for GMAC in device tree. change since v2: 1. remove power-gpio, reset-gpio, phyirq-gpio, pmu_regulator setting 2. add "snps,reset-gpio", "snps,reset-active-low;" "snps,reset-delays-us" Signed-off-by:
Roger Chen <roger.chen@rock-chips.com> Signed-off-by:
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Roger Chen authored
enable gmac in rk3288-evb-rk808.dts changes since v2: 1. add fixed regulator for PHY 2. remove power-gpio, reset-gpio, phyirq-gpio, pmu_regulator setting 3. add "snps,reset-gpio", "snps,reset-active-low;" "snps,reset-delays-us" Signed-off-by:
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Roger Chen authored
add gmac info in rk3288.dtsi for GMAC driver changes since v2: 1. add drive-strength in the pinctrl settings Signed-off-by:
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Roger Chen authored
modify CRU config for GMAC driver changes since v2: 1. remove SCLK_MAC_PLL Signed-off-by:
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Roger Chen authored
changes since v2: 1. remove SCLK_MAC_PLL Signed-off-by:
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Roger Chen authored
This driver is based on stmmac driver. changes since v2: - use tab instead of space for macros - use HIWORD_UPDATE macro for GMAC_CLK_RX_DL_CFG and GMAC_CLK_TX_DL_CFG - remove drive-strength setting in the driver and set it in the pinctrl settings - use dev_err instead of pr_err - remove clock names's macros, just use the real name of the clock - use devm_clk_get() instead of clk_get() - remove clk_set_parent(bsp_priv->clk_mac, bsp_priv->clk_mac_pll) - remove gpio setting for LDO, just use regulator API - remove phy reset using gpio in the glue layer, it has been handled in the stmmac driver - remove handling phy interrupt (mii interrupt) changes since v1: - use BIT() to set register - combine two remap_write() operations into one for the same register - use macros for register value setting - remove grf fail check in rk_gmac_setup() and save all the check in set_rgmii_speed() - remove .tx_coe=1 in rk_gmac_data Signed-off-by:
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- 31 Dec, 2014 23 commits
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David S. Miller authored
Signed-off-by: -
David S. Miller authored
Signed-off-by: -
David S. Miller authored
Alexander Duyck says: ==================== fib_trie: Reduce time spent in fib_table_lookup by 35 to 75% These patches are meant to address several performance issues I have seen in the fib_trie implementation, and fib_table_lookup specifically. With these changes in place I have seen a reduction of up to 35 to 75% for the total time spent in fib_table_lookup depending on the type of search being performed. On a VM running in my Corei7-4930K system with a trie of maximum depth of 7 this resulted in a reduction of over 370ns per packet in the total time to process packets received from an ixgbe interface and route them to a dummy interface. This represents a failed lookup in the local trie followed by a successful search in the main trie. Baseline Refactor ixgbe->dummy routing 1.20Mpps 2.21Mpps ------------------------------------------------------------ processing time per packet 835ns 453ns fib_table_lookup 50.1% 418ns 25.0% 113ns check_leaf.isra.9 7.9% 66ns -- -- ixgbe_clean_rx_irq 5.3% 44ns 9.8% 44ns ip_route_input_noref 2.9% 25ns 4.6% 21ns pvclock_clocksource_read 2.6% 21ns 4.6% 21ns ip_rcv 2.6% 22ns 4.0% 18ns In the simple case of receiving a frame and dropping it before it can reach the socket layer I saw a reduction of 40ns per packet. This represents a trip through the local trie with the correct leaf found with no need for any backtracing. Baseline Refactor ixgbe->local receive 2.65Mpps 2.96Mpps ------------------------------------------------------------ processing time per packet 377ns 337ns fib_table_lookup 25.1% 95ns 25.8% 87ns ixgbe_clean_rx_irq 8.7% 33ns 9.0% 30ns check_leaf.isra.9 7.2% 27ns -- -- ip_rcv 5.7% 21ns 6.5% 22ns These changes have resulted in several functions being inlined such as check_leaf and fib_find_node, but due to the code simplification the overall size of the code has been reduced. text data bss dec hex filename 16932 376 16 17324 43ac net/ipv4/fib_trie.o - before 15259 376 8 15643 3d1b net/ipv4/fib_trie.o - after Changes since RFC: Replaced this_cpu_ptr with correct call to this_cpu_inc in patch 1 Changed test for leaf_info mismatch to (key ^ n->key) & li->mask_plen in patch 10 ==================== Signed-off-by: -
Alexander Duyck authored
This change adds a tracking value for the maximum suffix length of all prefixes stored in any given tnode. With this value we can determine if we need to backtrace or not based on if the suffix is greater than the pos value. By doing this we can reduce the CPU overhead for lookups in the local table as many of the prefixes there are 32b long and have a suffix length of 0 meaning we can immediately backtrace to the root node without needing to test any of the nodes between it and where we ended up. Signed-off-by:
Alexander Duyck <alexander.h.duyck@redhat.com> Signed-off-by:
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Alexander Duyck authored
For some reason the compiler doesn't seem to understand that when we are in a loop that runs from tnode_child_length - 1 to 0 we don't expect the value of tn->bits to change. As such every call to tnode_get_child was rerunning tnode_chile_length which ended up consuming quite a bit of space in the resultant assembly code. I have gone though and verified that in all cases where tnode_get_child is used we are either winding though a fixed loop from tnode_child_length - 1 to 0, or are in a fastpath case where we are verifying the value by either checking for any remaining bits after shifting index by bits and testing for leaf, or by using tnode_child_length. size net/ipv4/fib_trie.o Before: text data bss dec hex filename 15506 376 8 15890 3e12 net/ipv4/fib_trie.o After: text data bss dec hex filename 14827 376 8 15211 3b6b net/ipv4/fib_trie.o Signed-off-by:
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Alexander Duyck authored
This change pulls the node_set_parent functionality out of put_child_reorg and instead leaves that to the function to take care of as well. By doing this we can fully construct the new cluster of tnodes and all of the pointers out of it before we start routing pointers into it. I am suspecting this will likely fix some concurency issues though I don't have a good test to show as such. Signed-off-by:
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Alexander Duyck authored
This change pushes the tnode freeing down into the inflate and halve functions. It makes more sense here as we have a better grasp of what is going on and when a given cluster of nodes is ready to be freed. I believe this may address a bug in the freeing logic as well. For some reason if the freelist got to a certain size we would call synchronize_rcu(). I'm assuming that what they meant to do is call synchronize_rcu() after they had handed off that much memory via call_rcu(). As such that is what I have updated the behavior to be. Signed-off-by:
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Alexander Duyck authored
This change makes it so that the assignment of the tnode to the parent is handled directly within whatever function is currently handling the node be it inflate, halve, or resize. By doing this we can avoid some of the need to set NULL pointers in the tree while we are resizing the subnodes. Signed-off-by:
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Alexander Duyck authored
This change pulls the logic for if we should inflate/halve the nodes out into separate functions. It also addresses what I believe is a bug where 1 full node is all that is needed to keep a node from ever being halved. Simple script to reproduce the issue: modprobe dummy; ifconfig dummy0 up for i in `seq 0 255`; do ifconfig dummy0:$i 10.0.${i}.1/24 up; done ifconfig dummy0:256 10.0.255.33/16 up for i in `seq 0 254`; do ifconfig dummy0:$i down; done Results from /proc/net/fib_triestat Before: Local: Aver depth: 3.00 Max depth: 4 Leaves: 17 Prefixes: 18 Internal nodes: 11 1: 8 2: 2 10: 1 Pointers: 1048 Null ptrs: 1021 Total size: 11 kB After: Local: Aver depth: 3.41 Max depth: 5 Leaves: 17 Prefixes: 18 Internal nodes: 12 1: 8 2: 3 3: 1 Pointers: 36 Null ptrs: 8 Total size: 3 kB Signed-off-by: -
Alexander Duyck authored
This change consists of a cut/paste of resize to behind inflate and halve so that I could remove the two function prototypes. Signed-off-by:
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Alexander Duyck authored
This change is to start cleaning up some of the rcu_read_lock/unlock handling. I realized while reviewing the code there are several spots that I don't believe are being handled correctly or are masking warnings by locally calling rcu_read_lock/unlock instead of calling them at the correct level. A common example is a call to fib_get_table followed by fib_table_lookup. The rcu_read_lock/unlock ought to wrap both but there are several spots where they were not wrapped. Signed-off-by:
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Alexander Duyck authored
This change makes it so that anything that can be shifted by, or compared to a value shifted by bits is updated to be an unsigned long. This is mostly a precaution against an insanely huge address space that somehow starts coming close to the 2^32 root node size which would require something like 1.5 billion addresses. I chose unsigned long instead of unsigned long long since I do not believe it is possible to allocate a 32 bit tnode on a 32 bit system as the memory consumed would be 16GB + 28B which exceeds the addressible space for any one process. Signed-off-by:
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Alexander Duyck authored
This change moves the pos value to the other side of the "bits" field. By doing this it actually simplifies a significant amount of code in the trie. For example when halving a tree we know that the bit lost exists at oldnode->pos, and if we inflate the tree the new bit being add is at tn->pos. Previously to find those bits you would have to subtract pos and bits from the keylength or start with a value of (1 << 31) and then shift that. There are a number of spots throughout the code that benefit from this. In the case of the hot-path searches the main advantage is that we can drop 2 or more operations from the search path as we no longer need to compute the value for the index to be shifted by and can instead just use the raw pos value. In addition the tkey_extract_bits is now defunct and can be replaced by get_index since the two operations were doing the same thing, but now get_index does it much more quickly as it is only an xor and shift versus a pair of shifts and a subtraction. Signed-off-by:
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Alexander Duyck authored
This patch updates the fib_table_insert function to take advantage of the changes made to improve the performance of fib_table_lookup. As a result the code should be smaller and run faster then the original. Signed-off-by:
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Alexander Duyck authored
This patch makes use of the same features I made use of for fib_table_lookup to streamline fib_find_node. The resultant code should be smaller and run faster than the original. Signed-off-by:
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Alexander Duyck authored
This patch is meant to reduce the complexity of fib_table_lookup by reducing the number of variables to the bare minimum while still keeping the same if not improved functionality versus the original. Most of this change was started off by the desire to rid the function of chopped_off and current_prefix_length as they actually added very little to the function since they only applied when computing the cindex. I was able to replace them mostly with just a check for the prefix match. As long as the prefix between the key and the node being tested was the same we know we can search the tnode fully versus just testing cindex 0. The second portion of the change ended up being a massive reordering. Originally the calls to check_leaf were up near the start of the loop, and the backtracing and descending into lower levels of tnodes was later. This didn't make much sense as the structure of the tree means the leaves are always the last thing to be tested. As such I reordered things so that we instead have a loop that will delve into the tree and only exit when we have either found a leaf or we have exhausted the tree. The advantage of rearranging things like this is that we can fully inline check_leaf since there is now only one reference to it in the function. Signed-off-by:
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Alexander Duyck authored
This change makes it so that leaf and tnode are the same struct. As a result there is no need for rt_trie_node anymore since everyting can be merged into tnode. On 32b systems this results in the leaf being 4 bytes larger, however I don't know if that is really an issue as this and an eariler patch that added bits & pos have increased the size from 20 to 28. If I am not mistaken slub/slab allocate on power of 2 sizes so 20 was likely being rounded up to 32 anyway. Signed-off-by:
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Alexander Duyck authored
Both the leaf and the tnode had an rcu_head in them, but they had them in slightly different places. Since we now have them in the same spot and know that any node with bits == 0 is a leaf and the rest are either vmalloc or kmalloc tnodes depending on the value of bits it makes it easy to combine the functions and reduce overhead. In addition I have taken advantage of the rcu_head pointer to go ahead and put together a simple linked list instead of using the tnode pointer as this way we can merge either type of structure for freeing. Signed-off-by:
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Alexander Duyck authored
This change makes some fundamental changes to the way leaves and tnodes are constructed. The big differences are: 1. Leaves now populate pos and bits indicating their full key size. 2. Trie nodes now mask out their lower bits to be consistent with the leaf 3. Both structures have been reordered so that rt_trie_node now consisists of a much larger region including the pos, bits, and rcu portions of the tnode structure. On 32b systems this will result in the leaf being 4B larger as the pos and bits values were added to a hole created by the key as it was only 4B in length. Signed-off-by: -
Alexander Duyck authored
The trie usage stats were currently being shared by all threads that were calling fib_table_lookup. As a result when multiple threads were performing lookups simultaneously the trie would begin to cache bounce between those threads. In order to prevent this I have updated the usage stats to use a set of percpu variables. By doing this we should be able to avoid the cache bouncing and still make use of these stats. Signed-off-by:
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stephen hemminger authored
The GRE tap device supports Ethernet over GRE, but doesn't care about the source address of the tunnel, therefore it can be changed without bring device down. Signed-off-by:
Stephen Hemminger <stephen@networkplumber.org> Signed-off-by:
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Bill Hong authored
Previously l2tp module did not provide any means for the user space to get notified when tunnels/sessions are added/modified/deleted. This change contains the following - create a multicast group for the listeners to register. - notify the registered listeners when the tunnels/sessions are created/modified/deleted. Signed-off-by:
Bill Hong <bhong@brocade.com> Reviewed-by:
Sven-Thorsten Dietrich <sven@brocade.com> Signed-off-by:
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Alex Gartrell authored
Instead of -1 with EAGAIN, read on a O_NONBLOCK tun fd will return 0. This fixes this by properly returning the error code from __skb_recv_datagram. Signed-off-by:
Alex Gartrell <agartrell@fb.com> Signed-off-by:
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