From: Zhu Donghong <zhudonghong@wxiat.com> Sunway inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I5GFPA -------------------------------- On SW64 platform, JMicron 585 SATA card directly connected to Root Complex may raise DMA failure when reboot, so we force a hot reset to Root Complex to fix can not access JMicron 585 SATA card. Signed-off-by: Zhu Donghong <zhudonghong@wxiat.com> Signed-off-by: Gu Zitao <guzitao@wxiat.com> --- arch/sw_64/platform/platform_xuelang.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/arch/sw_64/platform/platform_xuelang.c b/arch/sw_64/platform/platform_xuelang.c index 63a4b163e43e..ae8179b53b4c 100644 --- a/arch/sw_64/platform/platform_xuelang.c +++ b/arch/sw_64/platform/platform_xuelang.c @@ -26,9 +26,25 @@ extern void cpld_write(uint8_t slave_addr, uint8_t reg, uint8_t data); static void xuelang_kill_arch(int mode) { + struct pci_dev *pdev; + struct pci_controller *hose; + int val; + if (is_in_host()) { switch (mode) { case LINUX_REBOOT_CMD_RESTART: + pdev = pci_get_device(PCI_VENDOR_ID_JMICRON, + 0x0585, NULL); + if (pdev) { + hose = (struct pci_controller *)pdev->sysdata; + val = read_rc_conf(hose->node, hose->index, + RC_PORT_LINK_CTL); + write_rc_conf(hose->node, hose->index, + RC_PORT_LINK_CTL, val | 0x8); + write_rc_conf(hose->node, hose->index, + RC_PORT_LINK_CTL, val); + } + cpld_write(0x64, 0x00, 0xc3); mb(); break; -- 2.17.1