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If the driver reset fails, it may not work properly.
Therefore, the ndo.open() operation should be rejected.
In this patch, the driver calls netif_device_detach()
before the reset and calls netif_device_attach()
after the reset succeeds. If the reset fails,
netif_device_attach() is not called. Therefore,
netdev does not present and cannot be opened.
If reset fails, only the PCI reset (via sysfs)
can be used to attempt recovery.
Fixes: 3f5a61f6d504 ("net: hibmcge: Add reset supported in this module")
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250517095828.1763126-3-shaojijie@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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When the user dumps statistics, the hibmcge driver automatically
updates all statistics. If the driver is performing the reset operation,
the error data of 0xFFFFFFFF is updated.
Therefore, if the driver is resetting, the hbg_update_stats_by_info()
needs to return directly.
Fixes: c0bf9bf31e79 ("net: hibmcge: Add support for dump statistics")
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250517095828.1763126-2-shaojijie@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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After detecting the np_link_fail exception,
the driver attempts to fix the exception by
using phy_stop() and phy_start() in the scheduled task.
However, hbg_fix_np_link_fail() and .ndo_stop()
may be concurrently executed. As a result,
phy_stop() is executed twice, and the following Calltrace occurs:
hibmcge 0000:84:00.2 enp132s0f2: Link is Down
hibmcge 0000:84:00.2: failed to link between MAC and PHY, try to fix...
------------[ cut here ]------------
called from state HALTED
WARNING: CPU: 71 PID: 23391 at drivers/net/phy/phy.c:1503 phy_stop...
...
pc : phy_stop+0x138/0x180
lr : phy_stop+0x138/0x180
sp : ffff8000c76bbd40
x29: ffff8000c76bbd40 x28: 0000000000000000 x27: 0000000000000000
x26: ffff2020047358c0 x25: ffff202004735940 x24: ffff20200000e405
x23: ffff2020060e5178 x22: ffff2020060e4000 x21: ffff2020060e49c0
x20: ffff2020060e5170 x19: ffff20202538e000 x18: 0000000000000020
x17: 0000000000000000 x16: ffffcede02e28f40 x15: ffffffffffffffff
x14: 0000000000000000 x13: 205d313933333254 x12: 5b5d393430303233
x11: ffffcede04555958 x10: ffffcede04495918 x9 : ffffcede0274fee0
x8 : 00000000000bffe8 x7 : c0000000ffff7fff x6 : 0000000000000001
x5 : 00000000002bffa8 x4 : 0000000000000000 x3 : 0000000000000000
x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff20202e429480
Call trace:
phy_stop+0x138/0x180
hbg_fix_np_link_fail+0x4c/0x90 [hibmcge]
hbg_service_task+0xfc/0x148 [hibmcge]
process_one_work+0x180/0x398
worker_thread+0x210/0x328
kthread+0xe0/0xf0
ret_from_fork+0x10/0x20
---[ end trace 0000000000000000 ]---
This patch adds the rtnl_lock to hbg_fix_np_link_fail()
to ensure that other operations are not performed concurrently.
In addition, np_link_fail exception can be fixed
only when the PHY is link.
Fixes: e0306637e85d ("net: hibmcge: Add support for mac link exception handling feature")
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250410021327.590362-8-shaojijie@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The MAC hardware supports receiving two types of
pause frames from link partner.
One is a pause frame with a destination address
of 01:80:C2:00:00:01.
The other is a pause frame whose destination address
is the address of the hibmcge driver.
01:80:C2:00:00:01 is supported by default.
In .ndo_set_mac_address(), the hibmcge driver calls
.hbg_hw_set_rx_pause_mac_addr() to set its mac address as the
destination address of the rx puase frame.
Therefore, pause frames with two types of MAC addresses can be received.
Currently, the rx pause addr does not restored after reset.
As a result, pause frames whose destination address is
the hibmcge driver address cannot be correctly received.
This patch restores the configuration by calling
.hbg_hw_set_rx_pause_mac_addr() after reset is complete.
Fixes: 3f5a61f6d504 ("net: hibmcge: Add reset supported in this module")
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250410021327.590362-7-shaojijie@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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In the debugfs file, the driver displays the np_link fail state
based on the HBG_NIC_STATE_NP_LINK_FAIL.
However, HBG_NIC_STATE_NP_LINK_FAIL is cleared in hbg_service_task()
So, this value of np_link fail is always false.
This patch directly reads the related register to display the real state.
Fixes: e0306637e85d ("net: hibmcge: Add support for mac link exception handling feature")
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250410021327.590362-6-shaojijie@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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A dbg log is generated when the driver modifies the MTU,
which is expected to trace the change of the MTU.
However, the log is recorded after WRITE_ONCE().
At this time, netdev->mtu has been changed to the new value.
As a result, netdev->mtu is the same as new_mtu.
This patch modifies the log location and records logs before WRITE_ONCE().
Fixes: ff4edac6e9bd ("net: hibmcge: Implement some .ndo functions")
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250410021327.590362-5-shaojijie@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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issue
hbg_irqs is a global array which contains irq statistics.
However, the irq statistics of different network ports
point to the same global array. As a result, the statistics are incorrect.
This patch allocates a statistics array for each network port
to prevent the statistics of different network ports
from affecting each other.
irq statistics are removed from hbg_irq_info. Therefore,
all data in hbg_irq_info remains unchanged. Therefore,
the input parameter of some functions is changed to const.
Fixes: 4d089035fa19 ("net: hibmcge: Add interrupt supported in this module")
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250410021327.590362-4-shaojijie@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The driver does not support multicast filtering,
the mask must be set to 0xFFFFFFFF. Otherwise,
incorrect filtering occurs.
This patch fixes this problem.
Fixes: 37b367d60d0f ("net: hibmcge: Add unicast frame filter supported in this module")
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250410021327.590362-3-shaojijie@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The driver supports pause frames,
but does not pass pause frames based on rx pause enable configuration,
resulting in incorrect pause frame statistics.
like this:
mz eno3 '01 80 c2 00 00 01 00 18 2d 04 00 9c 88 08 00 01 ff ff' \
-p 64 -c 100
ethtool -S enp132s0f2 | grep -v ": 0"
NIC statistics:
rx_octets_total_filt_cnt: 6800
rx_filt_pkt_cnt: 100
The rx pause frames are filtered by the MAC hardware.
This patch configures pass pause frames based on the
rx puase enable status to ensure that
rx pause frames are not filtered.
mz eno3 '01 80 c2 00 00 01 00 18 2d 04 00 9c 88 08 00 01 ff ff' \
-p 64 -c 100
ethtool --include-statistics -a enp132s0f2
Pause parameters for enp132s0f2:
Autonegotiate: on
RX: on
TX: on
RX negotiated: on
TX negotiated: on
Statistics:
tx_pause_frames: 0
rx_pause_frames: 100
Fixes: 3a03763f3876 ("net: hibmcge: Add pauseparam supported in this module")
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250410021327.590362-2-shaojijie@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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This patch implements the .ndo_eth_ioctl() to
read and write the PHY register.
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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The MAC hardware is on the BMC side, and the driver is on the host side.
When the driver is abnormal, the BMC cannot directly detect the
exception cause.
Therefore, this patch implements the BMC diagnosis feature.
When users query driver diagnosis information on the BMC, the driver
detects the query request in the scheduled task and reports
driver statistics and link status to the BMC through the bar space.
The BMC collects logs to analyze exception causes.
Currently, the scheduled task is executed every 30 seconds
To quickly respond to user query requests,
this patch changes the scheduled task to once every second.
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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If the rate changed frequently, the PHY link ok,
but the MAC link maybe fails.
As a result, the network port is unavailable.
According to the documents of the chip,
core_reset needs to do to fix the fault.
In hw_adjus_link(), the core_reset is added to try to
ensure that MAC link status is normal.
In addition, MAC link failure detection is added.
If the MAC link fails after core_reset, driver invokes
the phy_stop() and phy_start() to re-link.
Due to phydev->lock, re-link cannot be triggered
in adjust_link(). Therefore, this operation
is invoked in a scheduled task.
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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the hardware error was reported by interrupt,
and need be fixed by doing function reset,
but the whole reset flow takes a long time,
should not do it in irq handler,
so do it in scheduled task.
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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This patch implements the rx checksum offload feature.
The tx checksum offload processing in .ndo_start_xmit()
has been accepted. This patch also adds the tx checksum
feature, including NETIF_F_IP_CSUM and NETIF_F_IPV6_CSUM
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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The driver supports many hw statistics. This patch supports
dump statistics through ethtool_ops and ndo.get_stats64().
The type of hw statistics register is u32,
To prevent the statistics register from overflowing,
the driver dump the statistics every 30 seconds.
in a scheduled task.
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Add nway_reset supported in this module
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20241216040532.1566229-8-shaojijie@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Sometimes, if the port doesn't work, we can try to fix it by resetting it.
This patch supports reset triggered by ethtool or FLR of PCIe, For example:
ethtool --reset eth0 dedicated
echo 1 > /sys/bus/pci/devices/0000\:83\:00.1/reset
We hope that the reset can be performed only when the port is down,
and the port cannot be up during the reset.
Therefore, the entire reset process is protected by the rtnl lock.
After the reset is complete, the hardware registers are restored
to their default values. Therefore, some rebuild operations are
required to rewrite the user configuration to the registers.
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20241216040532.1566229-7-shaojijie@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The MAC can automatically send or respond to pause frames.
This patch supports the function of enabling pause frames
by using ethtool.
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20241216040532.1566229-6-shaojijie@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The dump register is an effective way to analyze problems.
To ensure code flexibility, each register contains the type,
offset, and value information. The ethtool does the pretty print
based on these information.
The driver can dynamically add or delete registers that need to be dumped
in the future because information such as type and offset is contained.
ethtool always can do pretty print.
With the ethtool of a specific version,
the following effects are achieved:
[root@localhost sjj]# ./ethtool -d enp131s0f1
[SPEC] VALID [0x0000]: 0x00000001
[SPEC] EVENT_REQ [0x0004]: 0x00000000
[SPEC] MAC_ID [0x0008]: 0x00000002
[SPEC] PHY_ADDR [0x000c]: 0x00000002
[SPEC] MAC_ADDR_L [0x0010]: 0x00000808
[SPEC] MAC_ADDR_H [0x0014]: 0x08080802
[SPEC] UC_MAX_NUM [0x0018]: 0x00000004
[SPEC] MAX_MTU [0x0028]: 0x00000fc2
[SPEC] MIN_MTU [0x002c]: 0x00000100
[SPEC] TX_FIFO_NUM [0x0030]: 0x00000040
[SPEC] RX_FIFO_NUM [0x0034]: 0x0000007f
[SPEC] VLAN_LAYERS [0x0038]: 0x00000002
[MDIO] COMMAND_REG [0x0000]: 0x0000185f
[MDIO] ADDR_REG [0x0004]: 0x00000000
[MDIO] WDATA_REG [0x0008]: 0x0000a000
[MDIO] RDATA_REG [0x000c]: 0x00000000
[MDIO] STA_REG [0x0010]: 0x00000000
[GMAC] DUPLEX_TYPE [0x0008]: 0x00000001
[GMAC] FD_FC_TYPE [0x000c]: 0x00008808
[GMAC] FC_TX_TIMER [0x001c]: 0x000000ff
[GMAC] FD_FC_ADDR_LOW [0x0020]: 0xc2000001
[GMAC] FD_FC_ADDR_HIGH [0x0024]: 0x00000180
[GMAC] MAX_FRM_SIZE [0x003c]: 0x000005f6
[GMAC] PORT_MODE [0x0040]: 0x00000002
[GMAC] PORT_EN [0x0044]: 0x00000006
...
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20241216040532.1566229-5-shaojijie@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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MAC supports filtering unmatched unicast packets according to
the MAC address table. This patch adds the support for
unicast frame filtering.
To support automatic restoration of MAC entries
after reset, the driver saves a copy of MAC entries in the driver.
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Hariprasad Kelam <hkelam@marvell.com>
Link: https://patch.msgid.link/20241216040532.1566229-4-shaojijie@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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the driver requested three interrupts: "tx", "rx", "err".
The err interrupt is a summary interrupt. We distinguish
different errors based on the status register and mask.
With "cat /proc/interrupts | grep hibmcge",
we can't distinguish the detailed cause of the error,
so we added this file to debugfs.
the following effects are achieved:
[root@localhost sjj]# cat /sys/kernel/debug/hibmcge/0000\:83\:00.1/irq_info
RX : enabled: true , logged: false, count: 0
TX : enabled: true , logged: false, count: 0
MAC_MII_FIFO_ERR : enabled: false, logged: true , count: 0
MAC_PCS_RX_FIFO_ERR : enabled: false, logged: true , count: 0
MAC_PCS_TX_FIFO_ERR : enabled: false, logged: true , count: 0
MAC_APP_RX_FIFO_ERR : enabled: false, logged: true , count: 0
MAC_APP_TX_FIFO_ERR : enabled: false, logged: true , count: 0
SRAM_PARITY_ERR : enabled: true , logged: true , count: 0
TX_AHB_ERR : enabled: true , logged: true , count: 0
RX_BUF_AVL : enabled: true , logged: false, count: 0
REL_BUF_ERR : enabled: true , logged: true , count: 0
TXCFG_AVL : enabled: true , logged: false, count: 0
TX_DROP : enabled: true , logged: false, count: 0
RX_DROP : enabled: true , logged: false, count: 0
RX_AHB_ERR : enabled: true , logged: true , count: 0
MAC_FIFO_ERR : enabled: true , logged: false, count: 0
RBREQ_ERR : enabled: true , logged: false, count: 0
WE_ERR : enabled: true , logged: false, count: 0
The irq framework of hibmcge driver also includes tx/rx interrupts.
Therefore, TX and RX are not moved separately form this file.
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20241216040532.1566229-3-shaojijie@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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This patch initializes debugfs and creates root directory
for each device. The tx_ring and rx_ring debugfs files
are implemented together.
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20241216040532.1566229-2-shaojijie@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Add a Makefile and update Kconfig to build hibmcge driver.
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Implement the .get_drvinfo .get_link .get_link_ksettings to get
the basic information and working status of the driver.
Implement the .set_link_ksettings to modify the rate, duplex,
and auto-negotiation status.
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Implement rx_poll function to read the rx descriptor after
receiving the rx interrupt. Adjust the skb based on the
descriptor to complete the reception of the packet.
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Implement .ndo_start_xmit function to fill the information of the packet
to be transmitted into the tx descriptor, and then the hardware will
transmit the packet using the information in the tx descriptor.
In addition, we also implemented the tx_handler function to enable the
tx descriptor to be reused, and .ndo_tx_timeout function to print some
information when the hardware is busy.
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Implement the .ndo_open() .ndo_stop() .ndo_set_mac_address()
and .ndo_change_mtu functions().
And .ndo_validate_addr calls the eth_validate_addr function directly
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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The driver supports four interrupts: TX interrupt, RX interrupt,
mdio interrupt, and error interrupt.
Actually, the driver does not use the mdio interrupt.
Therefore, the driver does not request the mdio interrupt.
The error interrupt distinguishes different error information
by using different masks. To distinguish different errors,
the statistics count is added for each error.
To ensure the consistency of the code process, masks are added for the
TX interrupt and RX interrupt.
This patch implements interrupt request, and provides a
unified entry for the interrupt handler function. However,
the specific interrupt handler function of each interrupt
is not implemented currently.
Because of pcim_enable_device(), the interrupt vector
is already device managed and does not need to be free actively.
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Implements the C22 read and write PHY registers interfaces.
Some hardware interfaces related to the PHY are also implemented
in this patch.
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Add support for to read and write registers through the pic bar space.
Some driver parameters, such as mac_id, are determined by the
board form. Therefore, these parameters are initialized
from the register as device specifications.
the device specifications register are initialized and written by bmc.
driver will read these registers when loading.
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Add pci table supported in this module, and implement pci_driver function
to initialize this driver.
hibmcge is a passthrough network device. Its software runs
on the host side, and the MAC hardware runs on the BMC side
to reduce the host CPU area. The software interacts with the
MAC hardware through the PCIe.
┌─────────────────────────┐
│ HOST CPU network device │
│ ┌──────────────┐ │
│ │hibmcge driver│ │
│ └─────┬─┬──────┘ │
│ │ │ │
│HOST ┌───┴─┴───┐ │
│ │ PCIE RC │ │
└──────┴───┬─┬───┴────────┘
│ │
PCIE
│ │
┌──────┬───┴─┴───┬────────┐
│ │ PCIE EP │ │
│BMC └───┬─┬───┘ │
│ │ │ │
│ ┌────────┴─┴──────────┐ │
│ │ GE │ │
│ │ ┌─────┐ ┌─────┐ │ │
│ │ │ MAC │ │ MAC │ │ │
└─┴─┼─────┼────┼─────┼──┴─┘
│ PHY │ │ PHY │
└─────┘ └─────┘
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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