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Message-Id: <20210522131827.67551-3-verdre@v0yd.nl>
Date: Sat, 22 May 2021 15:18:26 +0200
From: Jonas Dreßler <verdre@...d.nl>
To: Amitkumar Karwar <amitkarwar@...il.com>,
Ganapathi Bhat <ganapathi017@...il.com>,
Sharvari Harisangam <sharvari.harisangam@....com>,
Xinming Hu <huxinming820@...il.com>,
Kalle Valo <kvalo@...eaurora.org>,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>
Cc: Jonas Dreßler <verdre@...d.nl>,
Tsuchiya Yuto <kitakar@...il.com>,
linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
Maximilian Luz <luzmaximilian@...il.com>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Bjorn Helgaas <bhelgaas@...gle.com>,
Pali Rohár <pali@...nel.org>
Subject: [RFC PATCH 2/3] mwifiex: pcie: add reset_d3cold quirk for Surface gen4+ devices
From: Tsuchiya Yuto <kitakar@...il.com>
To reset mwifiex on Surface gen4+ (Pro 4 or later gen) devices, it
seems that putting the wifi device into D3cold is required according
to errata.inf file on Windows installation (Windows/INF/errata.inf).
This patch adds a function that performs power-cycle (put into D3cold
then D0) and call the function at the end of reset_prepare().
Note: Need to also reset the parent device (bridge) of wifi on SB1;
it might be because the bridge of wifi always reports it's in D3hot.
When I tried to reset only the wifi device (not touching parent), it gave
the following error and the reset failed:
acpi device:4b: Cannot transition to power state D0 for parent in D3hot
mwifiex_pcie 0000:03:00.0: can't change power state from D3cold to D0 (config space inaccessible)
Signed-off-by: Tsuchiya Yuto <kitakar@...il.com>
Signed-off-by: Jonas Dreßler <verdre@...d.nl>
---
drivers/net/wireless/marvell/mwifiex/pcie.c | 7 +
.../wireless/marvell/mwifiex/pcie_quirks.c | 123 ++++++++++++++++++
.../wireless/marvell/mwifiex/pcie_quirks.h | 3 +
3 files changed, 133 insertions(+)
diff --git a/drivers/net/wireless/marvell/mwifiex/pcie.c b/drivers/net/wireless/marvell/mwifiex/pcie.c
index 02fdce926de5..d9acfea395ad 100644
--- a/drivers/net/wireless/marvell/mwifiex/pcie.c
+++ b/drivers/net/wireless/marvell/mwifiex/pcie.c
@@ -528,6 +528,13 @@ static void mwifiex_pcie_reset_prepare(struct pci_dev *pdev)
mwifiex_shutdown_sw(adapter);
clear_bit(MWIFIEX_IFACE_WORK_DEVICE_DUMP, &card->work_flags);
clear_bit(MWIFIEX_IFACE_WORK_CARD_RESET, &card->work_flags);
+
+ /* For Surface gen4+ devices, we need to put wifi into D3cold right
+ * before performing FLR
+ */
+ if (card->quirks & QUIRK_FW_RST_D3COLD)
+ mwifiex_pcie_reset_d3cold_quirk(pdev);
+
mwifiex_dbg(adapter, INFO, "%s, successful\n", __func__);
card->pci_reset_ongoing = true;
diff --git a/drivers/net/wireless/marvell/mwifiex/pcie_quirks.c b/drivers/net/wireless/marvell/mwifiex/pcie_quirks.c
index 4064f99b36ba..b5f214fc1212 100644
--- a/drivers/net/wireless/marvell/mwifiex/pcie_quirks.c
+++ b/drivers/net/wireless/marvell/mwifiex/pcie_quirks.c
@@ -15,6 +15,72 @@
/* quirk table based on DMI matching */
static const struct dmi_system_id mwifiex_quirk_table[] = {
+ {
+ .ident = "Surface Pro 4",
+ .matches = {
+ DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
+ DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface Pro 4"),
+ },
+ .driver_data = (void *)QUIRK_FW_RST_D3COLD,
+ },
+ {
+ .ident = "Surface Pro 5",
+ .matches = {
+ /* match for SKU here due to generic product name "Surface Pro" */
+ DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
+ DMI_EXACT_MATCH(DMI_PRODUCT_SKU, "Surface_Pro_1796"),
+ },
+ .driver_data = (void *)QUIRK_FW_RST_D3COLD,
+ },
+ {
+ .ident = "Surface Pro 5 (LTE)",
+ .matches = {
+ /* match for SKU here due to generic product name "Surface Pro" */
+ DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
+ DMI_EXACT_MATCH(DMI_PRODUCT_SKU, "Surface_Pro_1807"),
+ },
+ .driver_data = (void *)QUIRK_FW_RST_D3COLD,
+ },
+ {
+ .ident = "Surface Pro 6",
+ .matches = {
+ DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
+ DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface Pro 6"),
+ },
+ .driver_data = (void *)QUIRK_FW_RST_D3COLD,
+ },
+ {
+ .ident = "Surface Book 1",
+ .matches = {
+ DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
+ DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface Book"),
+ },
+ .driver_data = (void *)QUIRK_FW_RST_D3COLD,
+ },
+ {
+ .ident = "Surface Book 2",
+ .matches = {
+ DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
+ DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface Book 2"),
+ },
+ .driver_data = (void *)QUIRK_FW_RST_D3COLD,
+ },
+ {
+ .ident = "Surface Laptop 1",
+ .matches = {
+ DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
+ DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface Laptop"),
+ },
+ .driver_data = (void *)QUIRK_FW_RST_D3COLD,
+ },
+ {
+ .ident = "Surface Laptop 2",
+ .matches = {
+ DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
+ DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface Laptop 2"),
+ },
+ .driver_data = (void *)QUIRK_FW_RST_D3COLD,
+ },
{}
};
@@ -29,4 +95,61 @@ void mwifiex_initialize_quirks(struct pcie_service_card *card)
if (!card->quirks)
dev_info(&pdev->dev, "no quirks enabled\n");
+ if (card->quirks & QUIRK_FW_RST_D3COLD)
+ dev_info(&pdev->dev, "quirk reset_d3cold enabled\n");
+}
+
+static void mwifiex_pcie_set_power_d3cold(struct pci_dev *pdev)
+{
+ dev_info(&pdev->dev, "putting into D3cold...\n");
+
+ pci_save_state(pdev);
+ if (pci_is_enabled(pdev))
+ pci_disable_device(pdev);
+ pci_set_power_state(pdev, PCI_D3cold);
+}
+
+static int mwifiex_pcie_set_power_d0(struct pci_dev *pdev)
+{
+ int ret;
+
+ dev_info(&pdev->dev, "putting into D0...\n");
+
+ pci_set_power_state(pdev, PCI_D0);
+ ret = pci_enable_device(pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "pci_enable_device failed\n");
+ return ret;
+ }
+ pci_restore_state(pdev);
+
+ return 0;
+}
+
+int mwifiex_pcie_reset_d3cold_quirk(struct pci_dev *pdev)
+{
+ struct pci_dev *parent_pdev = pci_upstream_bridge(pdev);
+ int ret;
+
+ /* Power-cycle (put into D3cold then D0) */
+ dev_info(&pdev->dev, "Using reset_d3cold quirk to perform FW reset\n");
+
+ /* We need to perform power-cycle also for bridge of wifi because
+ * on some devices (e.g. Surface Book 1), the OS for some reasons
+ * can't know the real power state of the bridge.
+ * When tried to power-cycle only wifi, the reset failed with the
+ * following dmesg log:
+ * "Cannot transition to power state D0 for parent in D3hot".
+ */
+ mwifiex_pcie_set_power_d3cold(pdev);
+ mwifiex_pcie_set_power_d3cold(parent_pdev);
+
+ ret = mwifiex_pcie_set_power_d0(parent_pdev);
+ if (ret)
+ return ret;
+ ret = mwifiex_pcie_set_power_d0(pdev);
+ if (ret)
+ return ret;
+
+ return 0;
}
diff --git a/drivers/net/wireless/marvell/mwifiex/pcie_quirks.h b/drivers/net/wireless/marvell/mwifiex/pcie_quirks.h
index 7a1fe3b3a61a..549093067813 100644
--- a/drivers/net/wireless/marvell/mwifiex/pcie_quirks.h
+++ b/drivers/net/wireless/marvell/mwifiex/pcie_quirks.h
@@ -5,4 +5,7 @@
#include "pcie.h"
+#define QUIRK_FW_RST_D3COLD BIT(0)
+
void mwifiex_initialize_quirks(struct pcie_service_card *card);
+int mwifiex_pcie_reset_d3cold_quirk(struct pci_dev *pdev);
--
2.31.1
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