- 01 Jun, 2021 34 commits
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Vladimir Oltean authored
The SJA1105 has a static configuration comprised of a number of tables with entries. Some of these can be read and modified at runtime as well, through the dynamic configuration interface. As a careful reader can notice from the comments in this file, the software interface for accessing a table entry through the dynamic reconfiguration is a bit of a no man's land, and varies wildly across switch generations and even from one kind of table to another. I have tried my best to come up with a software representation of a 'common denominator' SPI command to access a table entry through the dynamic configuration interface: struct sja1105_dyn_cmd { bool search; u64 valid; /* must be set to 1 */ u64 rdwrset; /* 0 to read, 1 to write */ u64 errors; u64 valident; /* 0 if entry is invalid, 1 if valid */ u64 index; }; Relevant to this patch is the VALIDENT bit, which for READ commands is populated by the switch and lets us know if we're looking at junk or at a real table entry. In SJA1105, the dynamic reconfiguration interface for management routes has notably not implemented the VALIDENT bit, leading to a workaround to ignore this field in sja1105_dynamic_config_read(), as it will be set to zero, but the data is valid nonetheless. In SJA1110, this pattern has sadly been abused to death, and while there are many more tables which can be read back over the dynamic config interface compared to SJA1105, their handling isn't in any way more uniform. Generally speaking, if there is a single possible entry in a given table, and loading that table in the static config is mandatory as per the documentation, then the VALIDENT bit is deemed as redundant and more than likely not implemented. So it is time to make the workaround more official, and add a bit to the flags implemented by dynamic config tables. It will be used by more tables when SJA1110 support arrives. Signed-off-by:Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by:
Jakub Kicinski <kuba@kernel.org>
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Vladimir Oltean authored
In SJA1105, the xMII Mode Parameters Table field called PHY_MAC denotes the 'role' of the port, be it a PHY or a MAC. This makes a difference in the MII and RMII protocols, but RGMII is symmetric, so either PHY or MAC settings result in the same hardware behavior. The SJA1110 is different, and the RGMII ports only work when configured in MAC mode, so keep the port roles in MAC mode unconditionally. Why we had an RGMII port in the PHY role in the first place was because we wanted to have a way in the driver to denote whether RGMII delays should be applied based on the phy-mode property or not. This is already done in sja1105_parse_rgmii_delays() based on an intermediary struct sja1105_dt_port (which contains the port role). So it is a logical fallacy to use the hardware configuration as a scratchpad for driver data, it isn't necessary. We can also remove the gating condition for applying RGMII delays only for ports in the PHY role. The .setup_rgmii_delay() method looks at the priv->rgmii_rx_delay[port] and priv->rgmii_tx_delay[port] properties which are already populated properly (in the case of a port in the MAC role they are false). Removing this condition generates a few more SPI writes for these ports (clearing the RGMII delays) which are perhaps useless for SJA1105P/Q/R/S, where we know that the delays are disabled by default. But for SJA1110, the firmware on the embedded microcontroller might have done something funny, so it's always a good idea to clear the RGMII delays if that's what Linux expects. Signed-off-by:
Florian Fainelli <f.fainelli@gmail.com> Signed-off-by:
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Vladimir Oltean authored
In order to support the new speed of 2500Mbps, the SJA1110 has achieved the great performance of changing the encoding in the MAC Configuration Table for the port speeds of 10, 100, 1000 compared to SJA1105. Because this is a common driver, we need a layer of indirection in order to program the hardware with the right values irrespective of switch generation. Signed-off-by:
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Vladimir Oltean authored
On the SJA1105, all ports support the parallel "xMII" protocols (MII, RMII, RGMII) except for port 4 on SJA1105R/S which supports only SGMII. This was relatively easy to model, by special-casing the SGMII port. On the SJA1110, certain ports can be pinmuxed between SGMII and xMII, or between SGMII and an internal 100base-TX PHY. This creates problems, because the driver's assumption so far was that if a port supports SGMII, it uses SGMII. We allow the device tree to tell us how the port pinmuxing is done, and check that against a PHY interface type compatibility matrix for plausibility. The other big change is that instead of doing SGMII configuration based on what the port supports, we do it based on what is the configured phy_mode of the port. The 2500base-x support added in this patch is not complete. Signed-off-by:
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Vladimir Oltean authored
So far we've succeeded in operating without keeping a copy of the phy-mode in the driver, since we already have the static config and we can look at the xMII Mode Parameters Table which already holds that information. But with the SJA1110, we cannot make the distinction between sgmii and 2500base-x, because to the hardware's static config, it's all SGMII. So add a phy_mode property per port inside struct sja1105_private. Signed-off-by:
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Vladimir Oltean authored
Looking at the SGMII PCS from SJA1110, which is accessed indirectly through a different base address as can be seen in the next patch, it appears odd that the address accessed through indirection still references the base address from the SJA1105S register map (first MDIO register is at 0x1f0000), when it could index the SGMII registers starting from zero. Except that the 0x1f0000 is not a base address at all, it seems. It is 0x1f << 16 | 0x0000, and 0x1f is coding for the vendor-specific MMD2. So, it turns out, the Synopsys PCS implements all its registers inside the vendor-specific MMDs 1 and 2 (0x1e and 0x1f). This explains why the PCS has no overlaps (for the other MMDs) with other register regions of the switch (because no other MMDs are implemented). Change the code to remove the SGMII "base address" and explicitly encode the MMD for reads/writes. This will become necessary for SJA1110 support. Cc: Russell King <linux@armlinux.org.uk> Cc: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by:
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Vladimir Oltean authored
The SJA1105 R and S switches have 1 SGMII port (port 4). Because there is only one such port, there is no "port" parameter in the configuration code for the SGMII PCS. However, the SJA1110 can have up to 4 SGMII ports, each with its own SGMII register map. So we need to generalize the logic. Signed-off-by:
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Vladimir Oltean authored
Since commit f2f3e09396be ("net: dsa: sja1105: be compatible with "ethernet-ports" OF node name"), DSA supports the "ethernet-ports" name for the container node of the ports, but the sja1105 driver doesn't, because it handles some device tree parsing of its own. Add the second node name as a fallback. Signed-off-by: -
Shaokun Zhang authored
Function 'bnx2x_vfpf_release' is declared twice, so remove the repeated declaration. Cc: Ariel Elior <aelior@marvell.com> Cc: GR-everest-linux-l2@marvell.com Signed-off-by:
Shaokun Zhang <zhangshaokun@hisilicon.com> Acked-by:
Sudarsana Reddy Kalluru <skalluru@marvell.com> Link: https://lore.kernel.org/r/1622449756-2627-1-git-send-email-zhangshaokun@hisilicon.comSigned-off-by:
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Rocco Yue authored
The Tab key is used three times, causing the code block to be out of alignment with the context. Signed-off-by:
Rocco Yue <rocco.yue@mediatek.com> Link: https://lore.kernel.org/r/20210530113811.8817-1-rocco.yue@mediatek.comSigned-off-by:
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Jakub Kicinski authored
Guangbin Huang says: ==================== net: sealevel: clean up some code style issues This patchset clean up some code style issues. ==================== Link: https://lore.kernel.org/r/1622355874-18933-1-git-send-email-huangguangbin2@huawei.comSigned-off-by:
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Peng Li authored
Alignment should match open parenthesis. Signed-off-by:
Peng Li <lipeng321@huawei.com> Signed-off-by:
Guangbin Huang <huangguangbin2@huawei.com> Signed-off-by:
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Peng Li authored
Networking block comments don't use an empty /* line, use /* Comment... Block comments use * on subsequent lines. Block comments use a trailing */ on a separate line. This patch fixes the comments style issues. Signed-off-by:
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Peng Li authored
Remove the meaningless stylistically wrong comment. Signed-off-by:
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Peng Li authored
According to the chackpatch.pl, switch and case should be at the same indent. Signed-off-by:
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Peng Li authored
Should not initialise statics to false. Signed-off-by:
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Peng Li authored
Add spaces required around that '='. Signed-off-by:
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Peng Li authored
Fix the checkpatch error as open brace '{' following struct should go on the same line. Signed-off-by: -
Peng Li authored
Fix the checkpatch error as "(foo*)" should be "(foo *)". Signed-off-by:
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Peng Li authored
This patch fixes the checkpatch error about missing a blank line after declarations. Signed-off-by:
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Peng Li authored
This patch removes some redundant blank lines. Signed-off-by:
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Willy Tarreau authored
This is a complement to commit aa6dd211 ("inet: use bigger hash table for IP ID generation"), but focusing on some specific aspects of IPv6. Contary to IPv4, IPv6 only uses packet IDs with fragments, and with a minimum MTU of 1280, it's much less easy to force a remote peer to produce many fragments to explore its ID sequence. In addition packet IDs are 32-bit in IPv6, which further complicates their analysis. On the other hand, it is often easier to choose among plenty of possible source addresses and partially work around the bigger hash table the commit above permits, which leaves IPv6 partially exposed to some possibilities of remote analysis at the risk of weakening some protocols like DNS if some IDs can be predicted with a good enough probability. Given the wide range of permitted IDs, the risk of collision is extremely low so there's no need to rely on the positive increment algorithm that is shared with the IPv4 code via ip_idents_reserve(). We have a fast PRNG, so let's simply call prandom_u32() and be done with it. Performance measurements at 10 Gbps couldn't show any difference with the previous code, even when using a single core, because due to the large fragments, we're limited to only ~930 kpps at 10 Gbps and the cost of the random generation is completely offset by other operations and by the network transfer time. In addition, this change removes the need to update a shared entry in the idents table so it may even end up being slightly faster on large scale systems where this matters. The risk of at least one collision here is about 1/80 million among 10 IDs, 1/850k among 100 IDs, and still only 1/8.5k among 1000 IDs, which remains very low compared to IPv4 where all IDs are reused every 4 to 80ms on a 10 Gbps flow depending on packet sizes. Reported-by:
Amit Klein <aksecurity@gmail.com> Signed-off-by:
Willy Tarreau <w@1wt.eu> Reviewed-by:
Eric Dumazet <edumazet@google.com> Link: https://lore.kernel.org/r/20210529110746.6796-1-w@1wt.euSigned-off-by:
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Xie Yongji authored
This adds validation for used length (might come from an untrusted device) to avoid data corruption or loss. Signed-off-by:
Xie Yongji <xieyongji@bytedance.com> Acked-by:
Jason Wang <jasowang@redhat.com> Link: https://lore.kernel.org/r/20210531135852.113-1-xieyongji@bytedance.comSigned-off-by:
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Krzysztof Kozlowski authored
Use tabs to indent instead of spaces. No functional change. Signed-off-by:
Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> Link: https://lore.kernel.org/r/20210531073902.7111-7-krzysztof.kozlowski@canonical.comSigned-off-by:
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Krzysztof Kozlowski authored
Now that the kernel has ftrace, any debugging calls that just do "made it to this function!" and "leaving this function!" can be removed. Better to use standard debugging tools. Signed-off-by:
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Krzysztof Kozlowski authored
Now that the kernel has ftrace, any debugging calls that just do "made it to this function!" and "leaving this function!" can be removed. Better to use standard debugging tools. Signed-off-by:
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Krzysztof Kozlowski authored
Now that the kernel has ftrace, any debugging calls that just do "made it to this function!" and "leaving this function!" can be removed. Better to use standard debugging tools. Signed-off-by:
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Krzysztof Kozlowski authored
{} braces are not needed over single if-statement. Signed-off-by: -
Krzysztof Kozlowski authored
Now that the kernel has ftrace, any debugging calls that just do "made it to this function!" and "leaving this function!" can be removed. Better to use standard debugging tools. Signed-off-by:
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Krzysztof Kozlowski authored
Remove standard module init/exit boilerplate with module_driver() which also annotates the functions with __init. Signed-off-by:
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Krzysztof Kozlowski authored
Correct block comments and usage of tab in function definition. No functional change. Signed-off-by:
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Krzysztof Kozlowski authored
Use SPDX-License-Identifier: GPL-2.0-only, instead of hand writing it. Signed-off-by:
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Krzysztof Kozlowski authored
Now that the kernel has ftrace, any debugging calls that just do "made it to this function!" and "leaving this function!" can be removed. Better to use standard debugging tools. Signed-off-by:
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Krzysztof Kozlowski authored
Now that the kernel has ftrace, any debugging calls that just do "made it to this function!" and "leaving this function!" can be removed. Better to use standard debugging tools. This allows also to remove several local variables and entire fdp_nci_recv_frame() function (whose purpose was only to log). Signed-off-by:
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- 30 May, 2021 6 commits
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Jakub Kicinski authored
Peter Geis says: ==================== fixes for yt8511 phy driver The Intel clang bot caught a few uninitialized variables in the new Motorcomm driver. While investigating the issue, it was found that the driver would have unintended effects when used in an unsupported mode. Fixed the uninitialized ret variable and abort loading the driver in unsupported modes. ==================== Link: https://lore.kernel.org/r/20210529110556.202531-1-pgwipeout@gmail.comSigned-off-by:
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Peter Geis authored
While investigating the clang `ge` uninitialized variable report, it was discovered the default switch would have unintended consequences. Due to the switch to __phy_modify, the driver would modify the ID values in the default scenario. Fix this by promoting the interface mode switch and aborting when the mode is not a supported RGMII mode. This prevents the `ge` and `fe` variables from ever being used uninitialized. Fixes: 48e8c6f1 ("net: phy: add driver for Motorcomm yt8511 phy") Reported-by:
kernel test robot <lkp@intel.com> Reviewed-by:
Andrew Lunn <andrew@lunn.ch> Signed-off-by:
Peter Geis <pgwipeout@gmail.com> Signed-off-by:
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Peter Geis authored
clang doesn't preinitialize variables. If phy_select_page failed and returned an error, phy_restore_page would be called with `ret` being uninitialized. Even though phy_restore_page won't use `ret` in this scenario, initialize `ret` to silence the warning. Fixes: 48e8c6f1 ("net: phy: add driver for Motorcomm yt8511 phy") Reported-by:
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Jakub Kicinski authored
Yang Yingliang says: ==================== net: dsa: qca8k: check return value of read functions correctly patch #1 - Change return type and add output parameter to make check return value of read functions correctly. patch #2 - Add missing check return value in qca8k_phylink_mac_config(). ==================== Link: https://lore.kernel.org/r/20210529030439.1723306-1-yangyingliang@huawei.comSigned-off-by:
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Yang Yingliang authored
Now we can check qca8k_read() return value correctly, so if it fails, we need return directly. Signed-off-by:
Yang Yingliang <yangyingliang@huawei.com> Signed-off-by:
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Yang Yingliang authored
Current return type of qca8k_mii_read32() and qca8k_read() are unsigned, it can't be negative, so the return value check is unuseful. For check the return value correctly, change return type of the read functions and add a output parameter to store the read value. Signed-off-by:
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