| Message ID | 20231029110442.347448-3-mirsad.todorovac@alu.unizg.hr (mailing list archive) |
|---|---|
| State | Changes Requested |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | [v4,1/5] r8169: Coalesce r8169_mac_ocp_write/modify calls to reduce spinlock stalls | expand |
On 10/29/2023 4:04 AM, Mirsad Goran Todorovac wrote: > Repeated calls to r8168_mac_ocp_write() and r8168_mac_ocp_modify() in > the startup of 8168H involve implicit spin_lock_irqsave() and spin_unlock_irqrestore() > on each invocation. > > Coalesced with the corresponding helpers, r8168_mac_ocp_write_seq() and > r8168_mac_ocp_modify_seq() with a sinqle lock/unlock, these calls reduce overall > lock contention. > > Fixes: ef712ede3541d ("r8169: add helper r8168_mac_ocp_modify") > Fixes: 6e1d0b8988188 ("r8169:add support for RTL8168H and RTL8107E") > Cc: Heiner Kallweit <hkallweit1@gmail.com> > Cc: Marco Elver <elver@google.com> > Cc: nic_swsd@realtek.com > Cc: "David S. Miller" <davem@davemloft.net> > Cc: Eric Dumazet <edumazet@google.com> > Cc: Jakub Kicinski <kuba@kernel.org> > Cc: Paolo Abeni <pabeni@redhat.com> > Cc: netdev@vger.kernel.org > Cc: linux-kernel@vger.kernel.org > Link: https://lore.kernel.org/lkml/20231028005153.2180411-1-mirsad.todorovac@alu.unizg.hr/ > Link: https://lore.kernel.org/lkml/20231028110459.2644926-1-mirsad.todorovac@alu.unizg.hr/ > Signed-off-by: Mirsad Goran Todorovac <mirsad.todorovac@alu.unizg.hr> > --- Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c index 3dae924a6ca3..cbaac4675bd2 100644 --- a/drivers/net/ethernet/realtek/r8169_main.c +++ b/drivers/net/ethernet/realtek/r8169_main.c @@ -3227,6 +3227,21 @@ static void rtl_hw_start_8168h_1(struct rtl8169_private *tp) { 0x04, 0xffff, 0x854a }, { 0x01, 0xffff, 0x068b } }; + + static const struct e_info_regmaskset e_info_regmaskset_8168h_1[] = { + { 0xe056, 0x00f0, 0x0070 }, + { 0xe052, 0x6000, 0x8008 }, + { 0xe0d6, 0x01ff, 0x017f }, + { 0xd420, 0x0fff, 0x047f }, + }; + + static const struct e_info_regdata e_info_regdata_8168h_1[] = { + { 0xe63e, 0x0001 }, + { 0xe63e, 0x0000 }, + { 0xc094, 0x0000 }, + { 0xc09e, 0x0000 }, + }; + int rg_saw_cnt; rtl_ephy_init(tp, e_info_8168h_1); @@ -3267,15 +3282,8 @@ static void rtl_hw_start_8168h_1(struct rtl8169_private *tp) r8168_mac_ocp_modify(tp, 0xd412, 0x0fff, sw_cnt_1ms_ini); } - r8168_mac_ocp_modify(tp, 0xe056, 0x00f0, 0x0070); - r8168_mac_ocp_modify(tp, 0xe052, 0x6000, 0x8008); - r8168_mac_ocp_modify(tp, 0xe0d6, 0x01ff, 0x017f); - r8168_mac_ocp_modify(tp, 0xd420, 0x0fff, 0x047f); - - r8168_mac_ocp_write(tp, 0xe63e, 0x0001); - r8168_mac_ocp_write(tp, 0xe63e, 0x0000); - r8168_mac_ocp_write(tp, 0xc094, 0x0000); - r8168_mac_ocp_write(tp, 0xc09e, 0x0000); + r8168_mac_ocp_modify_seq(tp, e_info_regmaskset_8168h_1); + r8168_mac_ocp_write_seq(tp, e_info_regdata_8168h_1); } static void rtl_hw_start_8168ep(struct rtl8169_private *tp)
Repeated calls to r8168_mac_ocp_write() and r8168_mac_ocp_modify() in the startup of 8168H involve implicit spin_lock_irqsave() and spin_unlock_irqrestore() on each invocation. Coalesced with the corresponding helpers, r8168_mac_ocp_write_seq() and r8168_mac_ocp_modify_seq() with a sinqle lock/unlock, these calls reduce overall lock contention. Fixes: ef712ede3541d ("r8169: add helper r8168_mac_ocp_modify") Fixes: 6e1d0b8988188 ("r8169:add support for RTL8168H and RTL8107E") Cc: Heiner Kallweit <hkallweit1@gmail.com> Cc: Marco Elver <elver@google.com> Cc: nic_swsd@realtek.com Cc: "David S. Miller" <davem@davemloft.net> Cc: Eric Dumazet <edumazet@google.com> Cc: Jakub Kicinski <kuba@kernel.org> Cc: Paolo Abeni <pabeni@redhat.com> Cc: netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org Link: https://lore.kernel.org/lkml/20231028005153.2180411-1-mirsad.todorovac@alu.unizg.hr/ Link: https://lore.kernel.org/lkml/20231028110459.2644926-1-mirsad.todorovac@alu.unizg.hr/ Signed-off-by: Mirsad Goran Todorovac <mirsad.todorovac@alu.unizg.hr> --- v4: fixed complaints as advised by Heiner and checkpatch.pl. split the patch into five sections to be more easily manipulated and reviewed introduced r8168_mac_ocp_write_seq() applied coalescing of mac ocp writes/modifies for 8168H, 8125 and 8125B v3: removed register/mask pair array sentinels, so using ARRAY_SIZE(). avoided duplication of RTL_W32() call code as advised by Heiner. drivers/net/ethernet/realtek/r8169_main.c | 26 +++++++++++++++-------- 1 file changed, 17 insertions(+), 9 deletions(-)