lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Thu, 28 Mar 2019 15:36:22 +0300 From: Mika Westerberg <mika.westerberg@...ux.intel.com> To: linux-kernel@...r.kernel.org Cc: Michael Jamet <michael.jamet@...el.com>, Yehezkel Bernat <YehezkelShB@...il.com>, Andreas Noever <andreas.noever@...il.com>, Lukas Wunner <lukas@...ner.de>, "David S . Miller" <davem@...emloft.net>, Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, Christian Kellner <ckellner@...hat.com>, Mario.Limonciello@...l.com, Mika Westerberg <mika.westerberg@...ux.intel.com>, netdev@...r.kernel.org Subject: [PATCH v3 25/36] thunderbolt: Rework NFC credits handling NFC (non flow control) credits is actually 20-bit field so update tb_port_add_nfc_credits() to handle this properly. This allows us to set NFC credits for Display Port path in subsequent patches. Also make sure the function does not update the hardware if the underlying switch is already unplugged. Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com> --- drivers/thunderbolt/switch.c | 20 +++++++++++++------- drivers/thunderbolt/tb_regs.h | 3 +++ 2 files changed, 16 insertions(+), 7 deletions(-) diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c index 028e9a293382..9462e6982061 100644 --- a/drivers/thunderbolt/switch.c +++ b/drivers/thunderbolt/switch.c @@ -537,14 +537,20 @@ int tb_wait_for_port(struct tb_port *port, bool wait_if_unplugged) */ int tb_port_add_nfc_credits(struct tb_port *port, int credits) { - if (credits == 0) + u32 nfc_credits; + + if (credits == 0 || port->sw->is_unplugged) return 0; - tb_port_info(port, - "adding %#x NFC credits (%#x -> %#x)", - credits, - port->config.nfc_credits, - port->config.nfc_credits + credits); - port->config.nfc_credits += credits; + + nfc_credits = port->config.nfc_credits & TB_PORT_NFC_CREDITS_MASK; + nfc_credits += credits; + + tb_port_dbg(port, "adding %d NFC credits to %lu", + credits, port->config.nfc_credits & TB_PORT_NFC_CREDITS_MASK); + + port->config.nfc_credits &= ~TB_PORT_NFC_CREDITS_MASK; + port->config.nfc_credits |= nfc_credits; + return tb_port_write(port, &port->config.nfc_credits, TB_CFG_PORT, 4, 1); } diff --git a/drivers/thunderbolt/tb_regs.h b/drivers/thunderbolt/tb_regs.h index 75e935acade5..74c0f4a5606d 100644 --- a/drivers/thunderbolt/tb_regs.h +++ b/drivers/thunderbolt/tb_regs.h @@ -211,6 +211,9 @@ struct tb_regs_port_header { } __packed; +/* DWORD 4 */ +#define TB_PORT_NFC_CREDITS_MASK GENMASK(19, 0) + /* PCIe adapter registers */ #define TB_PCI_EN BIT(31) -- 2.20.1
Powered by blists - more mailing lists