- 06 Jun, 2016 7 commits
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David S. Miller authored
Vitaly Kuznetsov says: ==================== hv_netvsc: cleanup after untangling the pointer mess Changes since v1: - resend when net-next is open [David Miller] - rebased to current net-next. After we made traveling through our internal structures explicit it became obvious that some functions take arguments they don't need just to do redundant pointer travel and get to what they really need while their callers already have the required information. This is just a cleanup series with no functional changes intended. It doesn't pretend to be complete, additional cleanup of other functions may follow. ==================== Signed-off-by:David S. Miller <davem@davemloft.net>
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Vitaly Kuznetsov authored
The only caller rndis_filter_device_add() has 'struct net_device' pointer already. Signed-off-by:
Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by:
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Vitaly Kuznetsov authored
We unpack 'struct net_device' in netvsc_set_mac_addr() to get to 'struct hv_device' pointer which we use in rndis_filter_set_device_mac() to get back to 'struct net_device'. Signed-off-by:
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Vitaly Kuznetsov authored
Both rndis_filter_open()/rndis_filter_close() use struct hv_device to reach to struct netvsc_device only and all callers have it already. While on it, rename net_device to nvdev in rndis_filter_open() as net_device is misleading. Signed-off-by:
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Vitaly Kuznetsov authored
Make it easier to get 'struct netvsc_device' from 'struct net_device' and 'struct hv_device' by introducing inline helpers. Signed-off-by:
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Vitaly Kuznetsov authored
net_device_ctx is assigned in the very beginning of the function and 'net' pointer doesn't change. Signed-off-by:
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Michal Kubeček authored
Before commit 6d7b857d ("net: use lib/percpu_counter API for fragmentation mem accounting"), setting the reassembly high threshold to 0 prevented fragment reassembly as first fragment would be always evicted before second could be added to the queue. While inefficient, some users apparently relied on this method. Since the commit mentioned above, a percpu counter is used for reassembly memory accounting and high batch size avoids taking slow path in most common scenarios. As a result, a whole full sized packet can be reassembled without the percpu counter's main counter changing its value so that even with high_thresh set to 0, fragmented packets can be still reassembled and processed. Add explicit check preventing reassembly if high threshold is zero. Signed-off-by:
Michal Kubecek <mkubecek@suse.cz> Signed-off-by:
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- 05 Jun, 2016 14 commits
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David S. Miller authored
Kejian Yan says: ==================== net: hns: add support of ACPI This series adds HNS support of acpi. The routine will call some ACPI helper functions, like acpi_dev_found() and acpi_evaluate_dsm(), which are not included in other cases. In order to make system compile successfully in other cases except ACPI, it needs to add relative stub functions to linux/acpi.h. And we use device property functions instead of serial helper functions to suport both DT and ACPI cases. And then add the supports of ACPI for HNS. change log: v3->v4: mii-id gets from dev-name instead of address v2->v3: 1. add Review-by: Andy Shevchenko 2. fix the potential memory leak v1 -> v2: 1. use acpi_dev_found() instead of acpi_match_device_ids() to check if it is a acpi node. 2. use is_of_node() instead of IS_ENABLED() to check if it is a DT node. 3. split the patch("add support of acpi for hns-mdio") into two patches: 3.1 Move to use fwnode_handle 3.2 Add ACPI 4. add the patch which subject is dsaf misc operation method 5. fix the comments by Andy Shevchenko ==================== Signed-off-by: -
Kejian Yan authored
Enet needs to get configration parameter by acpi. This patch adds support of ACPI for enet. The configuration parameter will be configed in BIOS. Signed-off-by:
Kejian Yan <yankejian@huawei.com> Signed-off-by:
Yisen Zhuang <Yisen.Zhuang@huawei.com> Signed-off-by:
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Kejian Yan authored
The miscellaneous operation is implemented in BIOS, the kernel can call _DSM method help to call the implementation in ACPI case. Here is a patch to do that. Signed-off-by:
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Kejian Yan authored
In ACPI case, there is no interface to register phy device to mdio-bus. Phy device has to be registered itself to mdio-bus, and then enet can get the phy device's info so that it can config the phy-device to help to trasmit and receive data. HNS hardware topology is as below. The MDIO controller may control several PHY-devices, and each PHY-device connects to a MAC device. PHY-devices will register when each mac find PHY device in initial sequence. cpu | | ------------------------------------------- | | | | | | | dsaf | MDIO | MDIO | --------------------------- | | | | | | | | | | | | | | MAC MAC MAC MAC | | | | | | | ---- |-------- |-------- | | -------- || || || || PHY PHY PHY PHY Signed-off-by: -
Kejian Yan authored
Dsaf needs to get configuration parameter by ACPI, so this patch add support of ACPI. Signed-off-by:
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Kejian Yan authored
The misc operation for different hw platform may be different, if using current implementation, it will add a new branch on each function for every new hw platform, so we add a method for this operation. Signed-off-by:
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Kejian Yan authored
As device_node is only used by DT case, HNS needs to treat the other cases including ACPI. It needs to use uniform ways to handle both of DT and ACPI. This patch chooses phy_device, and of_phy_connect and of_phy_attach are only used by DT case. It needs to use uniform interface to handle that sequence by both DT and ACPI. Signed-off-by:
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Kejian Yan authored
As device_node is only used by DT case, it is expected to find uniform ways. So fwnode_handle is the suitable method. Signed-off-by:
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Kejian Yan authored
As irq_of_parse_and_map is only used by DT case, it is excepted to use a uniform interface. So it is used platform_get_irq() instead. Signed-off-by:
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Kejian Yan authored
OF series functions can be used only for DT case. Use unified device property function instead to support both DT and ACPI. Signed-off-by:
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Kejian Yan authored
hns-mdio needs to register itself to mii-bus. The info of the device can be read by both DT and ACPI. HNS tries to call Linux PHY driver to help access PHY-devices, the HNS hardware topology is as below. The MDIO controller may control several PHY-devices, and each PHY-device connects to a MAC device. The MDIO will be registered to mdiobus, then PHY-devices will register when each mac find PHY device. cpu | | ------------------------------------------- | | | | | | | dsaf | MDIO | MDIO | --------------------------- | | | | | | | | | | | | | | MAC MAC MAC MAC | | | | | | | ---- |-------- |-------- | | -------- || || || || PHY PHY PHY PHY And the driver can handle reset sequence by _RST method in DSDT in ACPI case. Signed-off-by: -
Kejian Yan authored
Hns-mdio only supports DT case now. do some cleanup to prepare for introducing other cases later, no functional change. Signed-off-by:
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Kejian Yan authored
acpi_evaluate_dsm() will be used to handle the _DSM method in ACPI case. It will be compiled in non-ACPI case, but the function is in acpi_bus.h and acpi_bus.h can only be used in ACPI case, so this patch add the stub function to linux/acpi.h to make compiled successfully in non-ACPI cases. Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Signed-off-by:
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Kejian Yan authored
acpi_dev_found() will be used to detect if a given ACPI device is in the system. It will be compiled in non-ACPI case, but the function is in acpi_bus.h and acpi_bus.h can only be used in ACPI case, so this patch add the stub function to linux/acpi.h to make compiled successfully in non-ACPI cases. Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Signed-off-by:
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- 04 Jun, 2016 19 commits
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David S. Miller authored
Andrew Lunn says: ==================== New DSA bind, switches as devices The interesting patches here are the last three. They implement a new binding for DSA, which removes a few limitations of the current DSA binding. In particular, it allows switches to be true Linux devices. These devices can be on any type of bus, unlike the old DSA binding which assumes MDIO. See the commit log for more details. The second to last patch modifies an existing boards device tree to use the new binding, giving a good example of how switches can be true MDIO devices. The last patch documents the new binding. Thanks go to Florian and Vivien for reviewing, testing and bug fixing these patches. Tested-by:
Vivien Didelot <vivien.didelot@savoirfairelinux.com> Tested-by:
Florian Fainelli <f.fainelli@gmail.com> Since V1: * Add lots of reviewed-by's * Fix rtable comment * dsa2: Clear cpu port mask in dsa_cpu_port_unapply() * dsa2: Only set dsa_port_mask when port successfully configured * dsa: clear {dsa|cpu}_port_mask on destroy Since RFC: * Split the mv88e6xxx MDIO refactor into a rename patch and a refactor patch. * Extend commit message with comment about wrong of_node_put() * Fix destroy of cpu and dsa ports. * Rename _DSA_TAG_LAST to DSA_TAG_LAST and add a comment. ==================== Signed-off-by:
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Andrew Lunn authored
Add the new binding to the documentation of the existing binding. Mark the old binding as deprecated. Signed-off-by:
Andrew Lunn <andrew@lunn.ch> Signed-off-by:
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Andrew Lunn authored
Hang the three switches of the three MDIO busses using the new DSA binding. Also, make use of the mdio-bus and explicitly list the phys on one device. This is not required, but good for testing. Signed-off-by:
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Andrew Lunn authored
The existing DSA binding has a number of limitations and problems. The main problem is that it cannot represent a switch as a linux device, hanging off some bus. It is limited to one CPU port. The DSA platform device is artificial, and does not really represent hardware. Implement a new binding which can be embedded into any type of node on a bus to represent one switch device, and its links to other switches. Signed-off-by:
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Andrew Lunn authored
Have the switch driver register its own MDIO bus. This allows for an mdio property in the device tree, with child nodes for phys, which can be referenced via phandles, etc. Signed-off-by:
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Andrew Lunn authored
The switch implements a generic MDIO bus, which could host more than PHYs. It is conventional to use _mdio_ or _mii_ in the function name, so rename them. Also postfix make the historically first read/write function with _direct, to help distinguish it from _indirect and _ppu. While touching these functions, remove some of the _ prefixes, which we are deprecating. Signed-off-by:
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Andrew Lunn authored
The switch may want to instantiate its own MDIO bus. Only do it centrally if the switch has not already created one, and the read op is implemented. Signed-off-by:
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Andrew Lunn authored
Replace the two switch statements with an array lookup, and store the result in the dsa tree structure. The drivers no longer need to know the selected tag protocol, so remove it from the dsa switch structure. Signed-off-by:
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Andrew Lunn authored
The merged driver no longer offers the option to use DSA tagging. So remove the code to setup the switch to do DSA tagging and hard code the use of EDSA. Signed-off-by:
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Andrew Lunn authored
Refactor the code to setup a single DSA/CPU port into a function of its own, and export it, so it can be used by the new binding. Similarly, refactor the destroy code into a function. When destroying the ports, don't put the of node. They should be released at the end along with the normal ports. Signed-off-by:
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Andrew Lunn authored
The new binding will not have a chip data structure, it will place the routing directly into the switch structure. To enable backwards compatibility, copy the routing from the chip data into the switch structure. Signed-off-by:
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Andrew Lunn authored
With a maximum of four switches, the size of the routing table is the same as the pointer to it. Removing it makes the code simpler. Signed-off-by:
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Andrew Lunn authored
Move the port device node structure into the port structure, from the chip data. This information is needed in the next step of implementing the new binding. The chip data structure is used while parsing the whole old binding, before the individual switch structures exist. With the new bindings, this is reversed, the switches exist first, and the interconnections between the switches is derived from the individual switch bindings. Thus this chip data structure becomes unneeded. Signed-off-by:
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Andrew Lunn authored
There are going to be more per-port members added to the switch structure. So add a port structure and move the netdev into it. Signed-off-by:
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Andrew Lunn authored
The platform data nr_chips is used when validating a received packet, to ensure it comes from a know switch chip. The number of possible switches is limited to DSA_MAX_SWITCHES, so use this as the first validation step. The new binding allows holes in the dst->ds[] array, so also ensure ensure there is a valid dsa_switch for this packet. Signed-off-by:
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Andrew Lunn authored
The DSA layer should no longer assume the switch is connected to an MDIO bus. As a result, we cannot use the address on the MDIO bus when forming the name of the switches internal MDIO bus for its builtin and possibly external PHYs. The switch index is sufficient to make the name unique, so drop the MDIO address. Signed-off-by:
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Vivien Didelot authored
Lock debugging shows that there is a possible circular lock in the PPU work code. Switch the lock order of smi_mutex and ppu_mutex to fix this. Here's the full trace: [ 4.341325] ====================================================== [ 4.347519] [ INFO: possible circular locking dependency detected ] [ 4.353800] 4.6.0 #4 Not tainted [ 4.357039] ------------------------------------------------------- [ 4.363315] kworker/0:1/328 is trying to acquire lock: [ 4.368463] (&ps->smi_mutex){+.+.+.}, at: [<8049c758>] mv88e6xxx_reg_read+0x30/0x54 [ 4.376313] [ 4.376313] but task is already holding lock: [ 4.382160] (&ps->ppu_mutex){+.+...}, at: [<8049cac0>] mv88e6xxx_ppu_reenable_work+0x28/0xd4 [ 4.390772] [ 4.390772] which lock already depends on the new lock. [ 4.390772] [ 4.398963] [ 4.398963] the existing dependency chain (in reverse order) is: [ 4.406461] [ 4.406461] -> #1 (&ps->ppu_mutex){+.+...}: [ 4.410897] [<806d86bc>] mutex_lock_nested+0x54/0x360 [ 4.416606] [<8049a800>] mv88e6xxx_ppu_access_get+0x28/0x100 [ 4.422906] [<8049b778>] mv88e6xxx_phy_read+0x90/0xdc [ 4.428599] [<806a4534>] dsa_slave_phy_read+0x3c/0x40 [ 4.434300] [<804943ec>] mdiobus_read+0x68/0x80 [ 4.439481] [<804939d4>] get_phy_device+0x58/0x1d8 [ 4.444914] [<80493ed0>] mdiobus_scan+0x24/0xf4 [ 4.450078] [<8049409c>] __mdiobus_register+0xfc/0x1ac [ 4.455857] [<806a40b0>] dsa_probe+0x860/0xca8 [ 4.460934] [<8043246c>] platform_drv_probe+0x5c/0xc0 [ 4.466627] [<804305a0>] driver_probe_device+0x118/0x450 [ 4.472589] [<80430b00>] __device_attach_driver+0xac/0x128 [ 4.478724] [<8042e350>] bus_for_each_drv+0x74/0xa8 [ 4.484235] [<804302d8>] __device_attach+0xc4/0x154 [ 4.489755] [<80430cec>] device_initial_probe+0x1c/0x20 [ 4.495612] [<8042f620>] bus_probe_device+0x98/0xa0 [ 4.501123] [<8042fbd0>] deferred_probe_work_func+0x4c/0xd4 [ 4.507328] [<8013a794>] process_one_work+0x1a8/0x604 [ 4.513030] [<8013ac54>] worker_thread+0x64/0x528 [ 4.518367] [<801409e8>] kthread+0xec/0x100 [ 4.523201] [<80108f30>] ret_from_fork+0x14/0x24 [ 4.528462] [ 4.528462] -> #0 (&ps->smi_mutex){+.+.+.}: [ 4.532895] [<8015ad5c>] lock_acquire+0xb4/0x1dc [ 4.538154] [<806d86bc>] mutex_lock_nested+0x54/0x360 [ 4.543856] [<8049c758>] mv88e6xxx_reg_read+0x30/0x54 [ 4.549549] [<8049cad8>] mv88e6xxx_ppu_reenable_work+0x40/0xd4 [ 4.556022] [<8013a794>] process_one_work+0x1a8/0x604 [ 4.561707] [<8013ac54>] worker_thread+0x64/0x528 [ 4.567053] [<801409e8>] kthread+0xec/0x100 [ 4.571878] [<80108f30>] ret_from_fork+0x14/0x24 [ 4.577139] [ 4.577139] other info that might help us debug this: [ 4.577139] [ 4.585159] Possible unsafe locking scenario: [ 4.585159] [ 4.591093] CPU0 CPU1 [ 4.595631] ---- ---- [ 4.600169] lock(&ps->ppu_mutex); [ 4.603693] lock(&ps->smi_mutex); [ 4.609742] lock(&ps->ppu_mutex); [ 4.615790] lock(&ps->smi_mutex); [ 4.619314] [ 4.619314] *** DEADLOCK *** [ 4.619314] [ 4.625256] 3 locks held by kworker/0:1/328: [ 4.629537] #0: ("events"){.+.+..}, at: [<8013a704>] process_one_work+0x118/0x604 [ 4.637288] #1: ((&ps->ppu_work)){+.+...}, at: [<8013a704>] process_one_work+0x118/0x604 [ 4.645653] #2: (&ps->ppu_mutex){+.+...}, at: [<8049cac0>] mv88e6xxx_ppu_reenable_work+0x28/0xd4 [ 4.654714] [ 4.654714] stack backtrace: [ 4.659098] CPU: 0 PID: 328 Comm: kworker/0:1 Not tainted 4.6.0 #4 [ 4.665286] Hardware name: Freescale Vybrid VF5xx/VF6xx (Device Tree) [ 4.671748] Workqueue: events mv88e6xxx_ppu_reenable_work [ 4.677174] Backtrace: [ 4.679674] [<8010d354>] (dump_backtrace) from [<8010d5a0>] (show_stack+0x20/0x24) [ 4.687252] r6:80fb3c88 r5:80fb3c88 r4:80fb4728 r3:00000002 [ 4.693003] [<8010d580>] (show_stack) from [<803b45e8>] (dump_stack+0x24/0x28) [ 4.700246] [<803b45c4>] (dump_stack) from [<80157398>] (print_circular_bug+0x208/0x32c) [ 4.708361] [<80157190>] (print_circular_bug) from [<8015a630>] (__lock_acquire+0x185c/0x1b80) [ 4.716982] r10:9ec22a00 r9:00000060 r8:8164b6bc r7:00000040 r6:00000003 r5:8163a5b4 [ 4.724905] r4:00000003 r3:9ec22de8 [ 4.728537] [<80158dd4>] (__lock_acquire) from [<8015ad5c>] (lock_acquire+0xb4/0x1dc) [ 4.736378] r10:60000013 r9:00000000 r8:00000000 r7:00000000 r6:9e5e9c50 r5:80e618e0 [ 4.744301] r4:00000000 [ 4.746879] [<8015aca8>] (lock_acquire) from [<806d86bc>] (mutex_lock_nested+0x54/0x360) [ 4.754976] r10:9e5e9c1c r9:80e616c4 r8:9f685ea0 r7:0000001b r6:9ec22a00 r5:8163a5b4 [ 4.762899] r4:9e5e9c1c [ 4.765477] [<806d8668>] (mutex_lock_nested) from [<8049c758>] (mv88e6xxx_reg_read+0x30/0x54) [ 4.774008] r10:80e60c5b r9:80e616c4 r8:9f685ea0 r7:0000001b r6:00000004 r5:9e5e9c10 [ 4.781930] r4:9e5e9c1c [ 4.784507] [<8049c728>] (mv88e6xxx_reg_read) from [<8049cad8>] (mv88e6xxx_ppu_reenable_work+0x40/0xd4) [ 4.793907] r7:9ffd5400 r6:9e5e9c68 r5:9e5e9cb0 r4:9e5e9c10 [ 4.799659] [<8049ca98>] (mv88e6xxx_ppu_reenable_work) from [<8013a794>] (process_one_work+0x1a8/0x604) [ 4.809059] r9:80e616c4 r8:9f685ea0 r7:9ffd5400 r6:80e0a1c8 r5:9f5f2e80 r4:9e5e9cb0 [ 4.816910] [<8013a5ec>] (process_one_work) from [<8013ac54>] (worker_thread+0x64/0x528) [ 4.825010] r10:9f5f2e80 r9:00000008 r8:80e0dc80 r7:80e0a1fc r6:80e0a1c8 r5:9f5f2e98 [ 4.832933] r4:80e0a1c8 [ 4.835510] [<8013abf0>] (worker_thread) from [<801409e8>] (kthread+0xec/0x100) [ 4.842827] r10:00000000 r9:00000000 r8:00000000 r7:8013abf0 r6:9f5f2e80 r5:9ec15740 [ 4.850749] r4:00000000 [ 4.853327] [<801408fc>] (kthread) from [<80108f30>] (ret_from_fork+0x14/0x24) [ 4.860557] r7:00000000 r6:00000000 r5:801408fc r4:9ec15740 Signed-off-by: -
Andrew Lunn authored
The new binding does not make use of dsa_chip_data, a.k.a cd. When retrieving the size of the EEPROM attached to a switch, don't assume there is a cd attached to the switch structure. Signed-off-by:
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David S. Miller authored
Signed-off-by:
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