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* qca-nss-dp: fix oops in nss_dp_probePetr Štetiar2023-06-121-2/+3
| | | | | | | | | | | | | | | | | | | | Currently kernel crashes when of_phy_connect has issues: Unable to handle kernel access to user memory outside uaccess routines at virtual address 0000000000000308 ... pc : phy_attached_print+0x28/0x1b0 lr : phy_attached_info+0x14/0x20 ... Call trace: phy_attached_print+0x28/0x1b0 phy_attached_info+0x14/0x20 nss_dp_adjust_link+0x544/0x6c4 [qca_nss_dp] of_phy_connect returns either pointer or NULL, so can't be checked with IS_ERR macro. Signed-off-by: Petr Štetiar <ynezz@true.cz> (cherry picked from commit 38c7cf0e69aeefdec44d513307732e4daf7d9794)
* kernel: add Qualcomm NSS dataplane ethernet driverRobert Marko2023-01-1616-0/+917
Qualcomm NSS-DP is as its name says Qualcomms ethernet driver for the NSS subsystem (Networking subsystem) built-into various Qualcomm SoCs. It has 2 modes of operation: * Without NSS FW and rest of code required for offloading This is the one that we will use as the amount of kernel patching required for NSS offloading and the fact that its not upstreamable at all makes it unusable for us. Driver in this mode is rather basic, it currently only offers NAPI GRO (Added by us as part of the fixup) and basically relies on the powerfull CPU to get good throughput. * With NSS FW and rest of code required for offloading In this mode, driver just registers the interfaces and hooks them into NSS-ECM to allow offloading. This mode is not viable for use in OpenWrt due to reasons already described above. This driver is required for ipq807x to have wired networking until a better one is available, so lets add the fixed-up version for 5.15 for now. Signed-off-by: Robert Marko <robimarko@gmail.com>