Re: [RFC PATCH 1/3] mwifiex: pcie: add DMI-based quirk impl for Surface devices

From: Tsuchiya Yuto
Date: Mon Nov 02 2020 - 05:31:23 EST

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On Wed, 2020-10-28 at 17:27 +0200, Andy Shevchenko wrote:
> On Wed, Oct 28, 2020 at 11:27:51PM +0900, Tsuchiya Yuto wrote:
>> This commit adds quirk implementation based on DMI matching with DMI
>> table for Microsoft Surface devices that uses mwifiex chip (currently,
>> all the devices that use mwifiex equip PCIe-88W8897 chip).
>>
>> This implementation can be used for quirks later.
>
> I guess you might need to resend this (and possible other PCI pm related)
> patches to linux-pci@ and Bjorn in Cc.
>
> They may advise possible other (better) solutions.

Thanks for the advice! I also feel it's better. And if I resend this to
the linux-pci mailing list, I feel that I should try to use
drivers/pci/quirks.c instead if possible. But if I do so with this quirk
implementation, it might be possible that it'll be too big change.

So, I'll just resend this series (with changes so that it can be used
for powr_save quirk as well like I said in the reply to another series)
to the linux-pci mailing list and Bjorn (and linux-wireless mailing list
as well) and see what they think.

>> Signed-off-by: Tsuchiya Yuto <kitakar@xxxxxxxxx>
>> ---
>> drivers/net/wireless/marvell/mwifiex/Makefile | 1 +
>> drivers/net/wireless/marvell/mwifiex/pcie.c | 4 +
>> drivers/net/wireless/marvell/mwifiex/pcie.h | 2 +
>> .../wireless/marvell/mwifiex/pcie_quirks.c | 114 ++++++++++++++++++
>> .../wireless/marvell/mwifiex/pcie_quirks.h | 11 ++
>> 5 files changed, 132 insertions(+)
>> create mode 100644 drivers/net/wireless/marvell/mwifiex/pcie_quirks.c
>> create mode 100644 drivers/net/wireless/marvell/mwifiex/pcie_quirks.h
>>
>> diff --git a/drivers/net/wireless/marvell/mwifiex/Makefile b/drivers/net/wireless/marvell/mwifiex/Makefile
>> index fdfd9bf15ed46..8a1e7c5b9c6e2 100644
>> --- a/drivers/net/wireless/marvell/mwifiex/Makefile
>> +++ b/drivers/net/wireless/marvell/mwifiex/Makefile
>> @@ -49,6 +49,7 @@ mwifiex_sdio-y += sdio.o
>> obj-$(CONFIG_MWIFIEX_SDIO) += mwifiex_sdio.o
>>
>> mwifiex_pcie-y += pcie.o
>> +mwifiex_pcie-y += pcie_quirks.o
>> obj-$(CONFIG_MWIFIEX_PCIE) += mwifiex_pcie.o
>>
>> mwifiex_usb-y += usb.o
>> diff --git a/drivers/net/wireless/marvell/mwifiex/pcie.c b/drivers/net/wireless/marvell/mwifiex/pcie.c
>> index 6a10ff0377a24..362cf10debfa0 100644
>> --- a/drivers/net/wireless/marvell/mwifiex/pcie.c
>> +++ b/drivers/net/wireless/marvell/mwifiex/pcie.c
>> @@ -27,6 +27,7 @@
>> #include "wmm.h"
>> #include "11n.h"
>> #include "pcie.h"
>> +#include "pcie_quirks.h"
>>
>> #define PCIE_VERSION "1.0"
>> #define DRV_NAME "Marvell mwifiex PCIe"
>> @@ -410,6 +411,9 @@ static int mwifiex_pcie_probe(struct pci_dev *pdev,
>> return ret;
>> }
>>
>> + /* check quirks */
>> + mwifiex_initialize_quirks(card);
>> +
>> if (mwifiex_add_card(card, &card->fw_done, &pcie_ops,
>> MWIFIEX_PCIE, &pdev->dev)) {
>> pr_err("%s failed\n", __func__);
>> diff --git a/drivers/net/wireless/marvell/mwifiex/pcie.h b/drivers/net/wireless/marvell/mwifiex/pcie.h
>> index 843d57eda8201..09839a3bd1753 100644
>> --- a/drivers/net/wireless/marvell/mwifiex/pcie.h
>> +++ b/drivers/net/wireless/marvell/mwifiex/pcie.h
>> @@ -242,6 +242,8 @@ struct pcie_service_card {
>> struct mwifiex_msix_context share_irq_ctx;
>> struct work_struct work;
>> unsigned long work_flags;
>> +
>> + unsigned long quirks;
>> };
>>
>> static inline int
>> diff --git a/drivers/net/wireless/marvell/mwifiex/pcie_quirks.c b/drivers/net/wireless/marvell/mwifiex/pcie_quirks.c
>> new file mode 100644
>> index 0000000000000..929aee2b0a60a
>> --- /dev/null
>> +++ b/drivers/net/wireless/marvell/mwifiex/pcie_quirks.c
>> @@ -0,0 +1,114 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/*
>> + * File for PCIe quirks.
>> + */
>> +
>> +/* The low-level PCI operations will be performed in this file. Therefore,
>> + * let's use dev_*() instead of mwifiex_dbg() here to avoid troubles (e.g.
>> + * to avoid using mwifiex_adapter struct before init or wifi is powered
>> + * down, or causes NULL ptr deref).
>> + */
>> +
>> +#include <linux/dmi.h>
>> +
>> +#include "pcie_quirks.h"
>> +
>> +/* 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 = 0,
>> + },
>> + {
>> + .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 = 0,
>> + },
>> + {
>> + .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 = 0,
>> + },
>> + {
>> + .ident = "Surface Pro 6",
>> + .matches = {
>> + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
>> + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface Pro 6"),
>> + },
>> + .driver_data = 0,
>> + },
>> + {
>> + .ident = "Surface Book 1",
>> + .matches = {
>> + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
>> + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface Book"),
>> + },
>> + .driver_data = 0,
>> + },
>> + {
>> + .ident = "Surface Book 2",
>> + .matches = {
>> + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
>> + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface Book 2"),
>> + },
>> + .driver_data = 0,
>> + },
>> + {
>> + .ident = "Surface Laptop 1",
>> + .matches = {
>> + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
>> + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface Laptop"),
>> + },
>> + .driver_data = 0,
>> + },
>> + {
>> + .ident = "Surface Laptop 2",
>> + .matches = {
>> + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
>> + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface Laptop 2"),
>> + },
>> + .driver_data = 0,
>> + },
>> + {
>> + .ident = "Surface 3",
>> + .matches = {
>> + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
>> + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface 3"),
>> + },
>> + .driver_data = 0,
>> + },
>> + {
>> + .ident = "Surface Pro 3",
>> + .matches = {
>> + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),
>> + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface Pro 3"),
>> + },
>> + .driver_data = 0,
>> + },
>> + {}
>> +};
>> +
>> +void mwifiex_initialize_quirks(struct pcie_service_card *card)
>> +{
>> + struct pci_dev *pdev = card->dev;
>> + const struct dmi_system_id *dmi_id;
>> +
>> + dmi_id = dmi_first_match(mwifiex_quirk_table);
>> + if (dmi_id)
>> + card->quirks = (uintptr_t)dmi_id->driver_data;
>> +
>> + if (!card->quirks)
>> + dev_info(&pdev->dev, "no quirks enabled\n");
>> +}
>> diff --git a/drivers/net/wireless/marvell/mwifiex/pcie_quirks.h b/drivers/net/wireless/marvell/mwifiex/pcie_quirks.h
>> new file mode 100644
>> index 0000000000000..5326ae7e56713
>> --- /dev/null
>> +++ b/drivers/net/wireless/marvell/mwifiex/pcie_quirks.h
>> @@ -0,0 +1,11 @@
>> +/* SPDX-License-Identifier: GPL-2.0 */
>> +/*
>> + * Header file for PCIe quirks.
>> + */
>> +
>> +#include "pcie.h"
>> +
>> +/* quirks */
>> +// quirk flags can be added here
>> +
>> +void mwifiex_initialize_quirks(struct pcie_service_card *card);
>> --
>> 2.29.1
>>
>

Next message: Mansur Alisha Shaik: "[RESEND] venus: fix calculating mbps in calculate_inst_freq()"
Previous message: Valentin Schneider: "Re: [PATCH 0/2] arm64: Allow the rescheduling IPI to bypass irq_enter/exit"
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