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 <[email protected]>
---
Current issue:
* After reset with this quirk, ASPM settings don't get restored.
Below is the "sudo lspci -nnvvv" diff before/after fw reset on Surface Book 1:
#
# 03:00.0 Ethernet controller [0200]: Marvell Technology Group Ltd. 88W8897 [AVASTAR] 802.11ac Wireless [11ab:2b38]
#
@@ -574,9 +574,9 @@
Capabilities: [168 v1] L1 PM Substates
L1SubCap: PCI-PM_L1.2+ PCI-PM_L1.1+ ASPM_L1.2+ ASPM_L1.1+ L1_PM_Substates+
PortCommonModeRestoreTime=70us PortTPowerOnTime=10us
- L1SubCtl1: PCI-PM_L1.2+ PCI-PM_L1.1+ ASPM_L1.2+ ASPM_L1.1+
- T_CommonMode=0us LTR1.2_Threshold=163840ns
- L1SubCtl2: T_PwrOn=44us
+ L1SubCtl1: PCI-PM_L1.2- PCI-PM_L1.1- ASPM_L1.2- ASPM_L1.1-
+ T_CommonMode=0us LTR1.2_Threshold=0ns
+ L1SubCtl2: T_PwrOn=10us
Kernel driver in use: mwifiex_pcie
Kernel modules: mwifiex_pcie
#
# no changes on root port of wifi regarding ASPM
#
As you see, all of the L1 substates are disabled after fw reset. LTR
value is also changed.
drivers/net/wireless/marvell/mwifiex/pcie.c | 7 ++
.../wireless/marvell/mwifiex/pcie_quirks.c | 73 +++++++++++++++++--
.../wireless/marvell/mwifiex/pcie_quirks.h | 3 +-
3 files changed, 74 insertions(+), 9 deletions(-)
diff --git a/drivers/net/wireless/marvell/mwifiex/pcie.c b/drivers/net/wireless/marvell/mwifiex/pcie.c
index 362cf10debfa0..c0c4b5a9149ab 100644
--- a/drivers/net/wireless/marvell/mwifiex/pcie.c
+++ b/drivers/net/wireless/marvell/mwifiex/pcie.c
@@ -529,6 +529,13 @@ 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__);
}
diff --git a/drivers/net/wireless/marvell/mwifiex/pcie_quirks.c b/drivers/net/wireless/marvell/mwifiex/pcie_quirks.c
index 929aee2b0a60a..edc739c542fea 100644
--- a/drivers/net/wireless/marvell/mwifiex/pcie_quirks.c
+++ b/drivers/net/wireless/marvell/mwifiex/pcie_quirks.c
@@ -21,7 +21,7 @@ static const struct dmi_system_id mwifiex_quirk_table[] = {
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface Pro 4"),
},
- .driver_data = 0,
+ .driver_data = (void *)QUIRK_FW_RST_D3COLD,
},
{
.ident = "Surface Pro 5",
@@ -30,7 +30,7 @@ static const struct dmi_system_id mwifiex_quirk_table[] = {
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
DMI_EXACT_MATCH(DMI_PRODUCT_SKU, "Surface_Pro_1796"),
},
- .driver_data = 0,
+ .driver_data = (void *)QUIRK_FW_RST_D3COLD,
},
{
.ident = "Surface Pro 5 (LTE)",
@@ -39,7 +39,7 @@ static const struct dmi_system_id mwifiex_quirk_table[] = {
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
DMI_EXACT_MATCH(DMI_PRODUCT_SKU, "Surface_Pro_1807"),
},
- .driver_data = 0,
+ .driver_data = (void *)QUIRK_FW_RST_D3COLD,
},
{
.ident = "Surface Pro 6",
@@ -47,7 +47,7 @@ static const struct dmi_system_id mwifiex_quirk_table[] = {
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface Pro 6"),
},
- .driver_data = 0,
+ .driver_data = (void *)QUIRK_FW_RST_D3COLD,
},
{
.ident = "Surface Book 1",
@@ -55,7 +55,7 @@ static const struct dmi_system_id mwifiex_quirk_table[] = {
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface Book"),
},
- .driver_data = 0,
+ .driver_data = (void *)QUIRK_FW_RST_D3COLD,
},
{
.ident = "Surface Book 2",
@@ -63,7 +63,7 @@ static const struct dmi_system_id mwifiex_quirk_table[] = {
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface Book 2"),
},
- .driver_data = 0,
+ .driver_data = (void *)QUIRK_FW_RST_D3COLD,
},
{
.ident = "Surface Laptop 1",
@@ -71,7 +71,7 @@ static const struct dmi_system_id mwifiex_quirk_table[] = {
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface Laptop"),
},
- .driver_data = 0,
+ .driver_data = (void *)QUIRK_FW_RST_D3COLD,
},
{
.ident = "Surface Laptop 2",
@@ -79,7 +79,7 @@ static const struct dmi_system_id mwifiex_quirk_table[] = {
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface Laptop 2"),
},
- .driver_data = 0,
+ .driver_data = (void *)QUIRK_FW_RST_D3COLD,
},
{
.ident = "Surface 3",
@@ -111,4 +111,61 @@ 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 5326ae7e56713..8b9dcb5070d87 100644
--- a/drivers/net/wireless/marvell/mwifiex/pcie_quirks.h
+++ b/drivers/net/wireless/marvell/mwifiex/pcie_quirks.h
@@ -6,6 +6,7 @@
#include "pcie.h"
/* quirks */
-// quirk flags can be added here
+#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);
--
2.29.1
On 21/05/22 03:18PM, Jonas Dre?ler wrote:
> From: Tsuchiya Yuto <[email protected]>
>
> 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)
>
May I know how did you reset only the wifi device when you encountered
this error?
> Signed-off-by: Tsuchiya Yuto <[email protected]>
> Signed-off-by: Jonas Dre?ler <[email protected]>
> ---
> 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);
> +}
pci_set_power_state with PCI_D3cold state calls
pci_bus_set_current_state(dev->subordinate, PCI_D3cold).
Maybe this was the reason for the earlier problem you had?
Not 100% sure about this though CCing: Alex
> +
> +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);
On the side note just save and restore is enough in this case?
What would be the device <-> driver state after the reset as you
are calling this on parent_pdev below so that affects other
devices on bus?
Thanks,
Amey
> +
> + 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
>
On 5/22/21 8:44 PM, Amey Narkhede wrote:
> On 21/05/22 03:18PM, Jonas Dreßler wrote:
>> From: Tsuchiya Yuto <[email protected]>
>>
>> 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)
>>
> May I know how did you reset only the wifi device when you encountered
> this error?
Not exactly sure what you mean by that, the trick was to put the parent
bridge into D3cold and then into D0 before transitioning the card into
D0.
That "Cannot transition to power state" warning is just the kernel
enforcing ACPI specs afaik, and that prevents us from putting the device
into ACPI state D0. This in turn means the device still has no power and
we can't set the PCI power state to D0, which is the second error.
>
>> Signed-off-by: Tsuchiya Yuto <[email protected]>
>> Signed-off-by: Jonas Dreßler <[email protected]>
>> ---
>> 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);
>> +}
> pci_set_power_state with PCI_D3cold state calls
> pci_bus_set_current_state(dev->subordinate, PCI_D3cold).
> Maybe this was the reason for the earlier problem you had?
> Not 100% sure about this though CCing: Alex
Hmm, so we'd only have to put the bridge into D3cold and that takes care
of the device going to D3cold automatically?
>
>> +
>> +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);
> On the side note just save and restore is enough in this case?
> What would be the device <-> driver state after the reset as you
> are calling this on parent_pdev below so that affects other
> devices on bus?
Not sure we can do anything more than save and restore, can we? I don't
think it will affect other devices on the bus, the parent bridge is only
connected to the wifi card, nothing else.
>
> Thanks,
> Amey
>
>> +
>> + 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
>>
Thanks for the review,
Jonas