When CONFIG_DEBUG_ATOMIC_SLEEP on, calling kzalloc with
GFP_KERNEL in hclge_mac_update_stats() will get below warning:

[   52.514677] BUG: sleeping function called from invalid context at mm/slab.h:501
[   52.522051] in_atomic(): 0, irqs_disabled(): 0, pid: 1015, name: ifconfig
[   52.528827] 2 locks held by ifconfig/1015:
[   52.532921]  #0: (____ptrval____) (&p->lock){....}, at: seq_read+0x54/0x748
[   52.539878]  #1: (____ptrval____) (rcu_read_lock){....}, at: dev_seq_start+0x0/0x140
[   52.547610] CPU: 16 PID: 1015 Comm: ifconfig Not tainted 5.3.0-rc3-00697-g20b80be #98
[   52.555408] Hardware name: Huawei TaiShan 2280 V2/BC82AMDC, BIOS 2280-V2 CS V3.B050.01 08/08/2019
[   52.564242] Call trace:
[   52.566687]  dump_backtrace+0x0/0x1f8
[   52.570338]  show_stack+0x14/0x20
[   52.573646]  dump_stack+0xb4/0xec
[   52.576950]  ___might_sleep+0x178/0x198
[   52.580773]  __might_sleep+0x74/0xe0
[   52.584338]  __kmalloc+0x244/0x2d8
[   52.587744]  hclge_mac_update_stats+0xc8/0x1f8 [hclge]
[   52.592870]  hclge_update_stats+0xe0/0x170 [hclge]
[   52.597651]  hns3_nic_get_stats64+0xa0/0x458 [hns3]
[   52.602514]  dev_get_stats+0x58/0x138
[   52.606165]  dev_seq_printf_stats+0x8c/0x280
[   52.610420]  dev_seq_show+0x14/0x40
[   52.613898]  seq_read+0x574/0x748
[   52.617205]  proc_reg_read+0xb4/0x108
[   52.620857]  __vfs_read+0x54/0xa8
[   52.624162]  vfs_read+0xa0/0x190
[   52.627380]  ksys_read+0xc8/0x178
[   52.630685]  __arm64_sys_read+0x40/0x50
[   52.634509]  el0_svc_common.constprop.0+0x120/0x1e0
[   52.639369]  el0_svc_handler+0x50/0x90
[   52.643106]  el0_svc+0x8/0xc

So this patch uses GFP_ATOMIC instead of GFP_KERNEL to fix it.

Fixes: d174ea75 ("net: hns3: add statistics for PFC frames and MAC control frames")
Signed-off-by: NZhongzhu Liu <liuzhongzhu@huawei.com>
Reviewed-by: NYunsheng Lin <linyunsheng@huawei.com>
Reviewed-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When calling hclge_reset_event() within HCLGE_RESET_INTERVAL,
it returns directly now. If no one call it again, then the
error which needs a reset to fix it can not be fixed.

So this patch activates the reset timer for this case, and
adds checking in the end of the reset procedure to make this
error fixed earlier.
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Reviewed-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Currently, the reset interrupt is cleared in the reset task, which
is too late. Since, when the hardware finish the previous reset,
it can begin to do a new global/IMP reset, if this new coming reset
type is same as the previous one, the driver will clear them together,
then driver can not get that there is another reset, but the hardware
still wait for the driver to deal with the second one.

So this patch clears PF's reset interrupt status in the
hclge_irq_handle(), the hardware waits for handshaking from
driver before doing reset, so the driver and hardware deal with reset
one by one.

BTW, when VF doing global/IMP reset, it reads PF's reset interrupt
register to get that whether PF driver's re-initialization is done,
since VF's re-initialization should be done after PF's. So we add
a new command and a register bit to do that. When VF receive reset
interrupt, it sets up this bit, and PF finishes re-initialization
send command to clear this bit, then VF do re-initialization.

Fixes: 4ed340ab ("net: hns3: Add reset process in hclge_main")
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Reviewed-by: NYunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Currently, the driver sets handshake status to tell the hardware
that the driver have downed the netdev and it can continue with
reset process. The driver will clear the handshake status when
re-initializing the CMDQ, and does not recover this status
when reset fail, which may cause the hardware to wait for
the handshake status to be set and not being able to continue
with reset process.

So this patch delays clearing handshake status just before UP,
and recovers this status when reset fail.

BTW, this patch adds a new function hclge(vf)_reset_handshake() to
deal with the reset handshake issue, and renames
HCLGE(VF)_NIC_CMQ_ENABLE to HCLGE(VF)_NIC_SW_RST_RDY which
represents this register bit more accurately.

Fixes: ada13ee3 ("net: hns3: add handshake with hardware while doing reset")
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Reviewed-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The member 'mac_add' defined in hclge_mac_ethertype_idx_rd_cmd
means MAC address, so 'mac_addr' is a better name for it.
Signed-off-by: NGuojia Liao <liaoguojia@huawei.com>
Signed-off-by: NGuangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The 4th and 5th parameter of hclge_cmd_query_error is useless, so this
patch removes them.
Signed-off-by: NWeihang Li <liweihang@hisilicon.com>
Reviewed-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When hclge_tm_schd_info_update calls hclge_tm_schd_info_init to
initialize the schedule info, hdev->tm_info.num_pg and
hdev->tx_sch_mode is not changed, which makes the checking in
hclge_tm_schd_info_init unnecessary.

So this patch moves the hdev->tm_info.num_pg and hdev->tx_sch_mode
checking into hclge_tm_schd_init and changes the return type of
hclge_tm_schd_info_init from int to void.
Signed-off-by: NYunsheng Lin <linyunsheng@huawei.com>
Reviewed-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The unused_count variable is used to indicate how many
RX BD need attaching new buffer in hns3_clean_rx_ring,
and the clean_count variable has the similar meaning.

This patch removes the clean_count variable and use
unused_count to uniformly indicate the RX BD that need
attaching new buffer.

This patch also clean up some coding style related to
variable assignment in hns3_clean_rx_ring.
Signed-off-by: NYunsheng Lin <linyunsheng@huawei.com>
Reviewed-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The local variable return_status in hclge_get_mac_val_cmd_status()
is useless. So this patch returns the error code directly, instead of
using this variable. Also, replace some '%d' with '%u' in
hclge_get_mac_val_cmd_status().
Signed-off-by: NJian Shen <shenjian15@huawei.com>
Reviewed-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Previously, when changing the ring parameters, we free the old
ring resources firstly, and then setup the new ring resources.
In some case of an memory allocation fail, there will be no
resources to use. This patch refines it by setup new ring
resources and free the old ring resources in order.

Also reduce the max ring BD number to 32760 according to UM.
Signed-off-by: NJian Shen <shenjian15@huawei.com>
Reviewed-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Some commands are not supported on DCB-unsupported ports.
This patch distinguishes these commands and does not query
unsupported commands in debugfs.

This patch also fix an error in the dump "qos buf cfg"
command in debugfs.

Fixes: 2849d4e7 ("net: hns3: Add "tc config" info query function")
Fixes: 7d9d7f88 ("net: hns3: Add "qos buffer" config info query function")
Signed-off-by: NYufeng Mo <moyufeng@huawei.com>
Reviewed-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When NCSI has HW error, the IMP will report this error to the driver
by sending a mailbox. After received this message, the driver should
assert a global reset to fix this kind of HW error.
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Reviewed-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Previously, PF updates link status per second. For some scenario,
it requires link down event being reported more quickly.
To solve it, firmware pushes the link change event to PF with
CMDQ message, and driver updates the link status directly.
Signed-off-by: NJian Shen <shenjian15@huawei.com>
Reviewed-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

dev_info() is more appropriate for printing messages when driver
initialization done, so switch to dev_info().
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Hardware supports 0.5K, 1K, 2K, 4K RX buffer size, the
RX buffer can not be reused because the hns3_page_order
return 0 when page size and RX buffer size are both 4096.

So this patch changes the hns3_page_order to return 1 when
RX buffer is greater than half of the page size and page size
is less the 8192, and dev_alloc_pages has already been used
to allocate the compound page for RX buffer.

This patch also changes hnae3_* to hns3_* for page order
and RX buffer size calculation because they are used in
hns3 module.
Signed-off-by: NYunsheng Lin <linyunsheng@huawei.com>
Reviewed-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The misc interrupt is used to schedule the reset and mailbox
subtask, and service_task delayed_work is used to do periodic
management work each second.

This patch sets the above three subtask's affinity using the
misc interrupt' affinity.

Also this patch setups a affinity notify for misc interrupt to
allow user to change the above three subtask's affinity.
Signed-off-by: NYunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Use delayed work instead of using timers to trigger the
hclge_serive.

Simplify the code with one less middle function and in order
to support misc irq affinity.
Signed-off-by: NYunsheng Lin <linyunsheng@huawei.com>
Reviewed-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Some times just see the eth interface have been down/up via
dmesg, but can not know why the eth down. So adds some debug
messages to identify the cause for this.
Signed-off-by: NYonglong Liu <liuyonglong@huawei.com>
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch modifies firmware version display format in
hclge(vf)_cmd_init() and hns3_get_drvinfo(). Also, adds
some optimizations for firmware version display format.
Signed-off-by: NYufeng Mo <moyufeng@huawei.com>
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When allocating memory, the GFP_KERNEL cannot be used during the
spin_lock period. This is because it may cause scheduling when holding
spin_lock. This patch changes GFP flag to GFP_ATOMIC in this case.

Fixes: dd74f815 ("net: hns3: Add support for rule add/delete for flow director")
Signed-off-by: NYufeng Mo <moyufeng@huawei.com>
Signed-off-by: Nlipeng 00277521 <lipeng321@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Currently, hclge_reset_err_handle() will assert a global reset
when the failing count is smaller than MAX_RESET_FAIL_CNT, which
will affect other running functions.

So this patch removes this upgrading, and uses re-scheduling reset
task to do it.
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Reviewed-by: NYunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

For some cases, ops->get_reset_level may not be implemented, so we
should check whether it is NULL before calling get_reset_level.
Signed-off-by: NGuangbin Huang <huangguangbin@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

hns3_set_channels() should check the resetting status firstly,
since the device will reinitialize when resetting. If the
reset has not completed, the hns3_set_channels() may access
invalid memory.
Signed-off-by: NJian Shen <shenjian15@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

In preparation for unifying the skb_frag and bio_vec, use the fine
accessors which already exist and use skb_frag_t instead of
struct skb_frag_struct.
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

All constant in 'enum HCLGE_MBX_OPCODE' start with HCLGE, except
'HLCGE_MBX_PUSH_VLAN_INFO' (C and L switched)

s/HLC/HCL/
Signed-off-by: NChristophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

If HCLGE_MBX_MAX_RESP_DATA_SIZE > HCLGE_MBX_MAX_RESP_DATA_SIZE,
the memcpy will cause out of memory. So this patch just set
resp_data_len to the maximum length for this case.
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

There are some bitwise operator used signed type, this patch fixes
them with unsigned type.
Signed-off-by: NYonglong Liu <liuyonglong@huawei.com>
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch adds default value for tc_size and tc_offset, or it may
get random value and used later.
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The value of msg_data may be NULL in some cases, which will cause
errors reported by some compiler.

So this patch adds a check to fix it.
Signed-off-by: NWeihang Li <liweihang@hisilicon.com>
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The value of param type is always not changed in
hclgevf_bind_ring_to_vector, move the assignment to
front of "for {}" can reduce the redundant assignment.
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Currently, the HNS3 driver just defines part of IMP return code,
This patch supplements all the remaining IMP return code, and adds
a function to convert this code to the error number.
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Currently, the driver queries the media port information, and
updates the port capability periodically. But it sets an error
mac->speed_type value, which stops update port capability.

Fixes: 88d10bd6 ("net: hns3: add support for multiple media type")
Signed-off-by: NJian Shen <shenjian15@huawei.com>
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Flow control autoneg is unsupported for fibre port. It takes no
effect for flow control when restart autoneg. This patch fixes
it, return -EOPNOTSUPP when user tries to enable flow control
autoneg.
Signed-off-by: NJian Shen <shenjian15@huawei.com>
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

For revision 0x20, the broadcast promisc is enabled by firmware,
it's unnecessary to enable it when initializing VF.

For revision 0x21, it's necessary to enable broadcast promisc mode
when initializing or re-initializing VF, otherwise, it will be
unable to send and receive promisc packets.

Fixes: f01f5559 ("net: hns3: don't allow vf to enable promisc mode")
Signed-off-by: NJian Shen <shenjian15@huawei.com>
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

If CMDQ ring is full, hclge_cmd_send may return directly, but IMP still
working and HW pointer changed, SW ring pointer do not match the HW
pointer. This patch update the SW pointer every time when the space is
full, so it can work normally next time if IMP and HW still working.
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The HNS3_RXD_VLD_B bit has already been checked in hns3_add_frag
or hns3_handle_rx_bd before calling hns3_handle_bdinfo, so when
hns3_handle_bdinfo is called, the HNS3_RXD_VLD_B bit is always
set, which makes the checking in hns3_handle_bdinfo unnecessary.

This patch removes the RXD_VLD_B checking in hns3_handle_bdinfo.
Signed-off-by: NYunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch removes unused linkmode definition.
Signed-off-by: NJian Shen <shenjian15@huawei.com>
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The frame column is based on rx_crc_errors and rx_frame_errors. So
l3l4 checksum error should not be counted by rx_crc_errors. Instead,
l3l4 checksum error should be counted in ifconfig error column.

Fixes: d3ec4ef6 ("net: hns3: refactor the statistics updating for netdev")
Signed-off-by: NYufeng Mo <moyufeng@huawei.com>
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Since some MSI-X interrupt's status may be cleared by hardware,
so when the driver receives the interrupt, reading
HCLGE_VECTOR0_PF_OTHER_INT_STS_REG register will get an empty
unknown interrupt. For this case, the irq handler should enable
vector0 interrupt. This patch also use dev_info() instead of
dev_dbg() in the hclge_check_event_cause(), since this information
will be useful for normal usage.
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The VF reset may fail for some probabilistic reasons,
such as wait for hardware reset timeout, wait for mailbox
response timeout, so this patch tries to re-schedule the
reset task when the number of reset failing is under
HCLGEVF_RESET_MAX_FAIL_CNT. This patch also add a function
hclgevf_reset_err_handle() to handle the reset failing.
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>