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Date: Wed, 8 Jan 2020 19:03:29 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc: Darren Hart <dvhart@...radead.org>,
Lee Jones <lee.jones@...aro.org>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
"H . Peter Anvin" <hpa@...or.com>, x86@...nel.org,
Zha Qipeng <qipeng.zha@...el.com>,
Rajneesh Bhardwaj <rajneesh.bhardwaj@...ux.intel.com>,
"David E . Box" <david.e.box@...ux.intel.com>,
Guenter Roeck <linux@...ck-us.net>,
Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Wim Van Sebroeck <wim@...ux-watchdog.org>,
platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 32/36] platform/x86: intel_pmc_ipc: Move PCI IDs to
intel_scu_pcidrv.c
On Wed, Jan 08, 2020 at 02:41:57PM +0300, Mika Westerberg wrote:
> The PCI probe driver in intel_pmc_ipc.c is a duplicate of what we
> already have in intel_scu_pcidrv.c with the exception that the later also
> creates SCU specific devices. Move the PCI IDs from the intel_pmc_ipc.c
> to intel_scu.c and use driver_data to detect whether SCU devices need to
> be created or not.
>
> Also update Kconfig entry to mention all platforms supported by the
> Intel SCU PCI driver.
One comment below. After addressing,
Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
>
> Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
> ---
> drivers/platform/x86/Kconfig | 13 +++--
> drivers/platform/x86/intel_pmc_ipc.c | 73 +------------------------
> drivers/platform/x86/intel_scu_pcidrv.c | 21 +++++--
> 3 files changed, 27 insertions(+), 80 deletions(-)
>
> diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
> index 797683c5d005..1c5afb9e4965 100644
> --- a/drivers/platform/x86/Kconfig
> +++ b/drivers/platform/x86/Kconfig
> @@ -994,13 +994,18 @@ config INTEL_SCU
>
> config INTEL_SCU_PCI
> bool "Intel SCU PCI driver"
> - depends on X86_INTEL_MID
> + depends on X86_INTEL_MID || PCI
Dependency on PCI is much more generic than Intel MID one. I think we may drop
X86_INTEL_MID here completely -- less users of it better.
> select INTEL_SCU
> help
> SCU is used to bridge the communications between kernel and
> SCU on some embedded Intel x86 platforms. It also creates
> - devices that are connected to the SoC through the SCU. This is
> - not needed for PC-type machines.
> + devices that are connected to the SoC through the SCU.
> + Platforms supported:
> + Medfield
> + Clovertrail
> + Merrifield
> + Broxton
> + Apollo Lake
>
> config INTEL_SCU_IPC_UTIL
> tristate "Intel SCU IPC utility driver"
> @@ -1192,7 +1197,7 @@ config INTEL_SMARTCONNECT
>
> config INTEL_PMC_IPC
> tristate "Intel PMC IPC Driver"
> - depends on ACPI && PCI
> + depends on ACPI
> select INTEL_SCU_IPC
> ---help---
> This driver provides support for PMC control on some Intel platforms.
> diff --git a/drivers/platform/x86/intel_pmc_ipc.c b/drivers/platform/x86/intel_pmc_ipc.c
> index 241bce603183..acec1c6d2069 100644
> --- a/drivers/platform/x86/intel_pmc_ipc.c
> +++ b/drivers/platform/x86/intel_pmc_ipc.c
> @@ -17,7 +17,6 @@
> #include <linux/interrupt.h>
> #include <linux/io-64-nonatomic-lo-hi.h>
> #include <linux/module.h>
> -#include <linux/pci.h>
> #include <linux/platform_device.h>
>
> #include <asm/intel_pmc_ipc.h>
> @@ -194,62 +193,6 @@ static int update_no_reboot_bit(void *priv, bool set)
> PMC_CFG_NO_REBOOT_MASK, value);
> }
>
> -static int ipc_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
> -{
> - struct intel_pmc_ipc_dev *pmc = &ipcdev;
> - struct intel_scu_ipc_pdata pdata;
> - struct intel_scu_ipc_dev *scu;
> - int ret;
> -
> - /* Only one PMC is supported */
> - if (pmc->dev)
> - return -EBUSY;
> -
> - memset(&pdata, 0, sizeof(pdata));
> - spin_lock_init(&ipcdev.gcr_lock);
> -
> - ret = pcim_enable_device(pdev);
> - if (ret)
> - return ret;
> -
> - ret = pcim_iomap_regions(pdev, 1 << 0, pci_name(pdev));
> - if (ret)
> - return ret;
> -
> - pdata.ipc_regs = pcim_iomap_table(pdev)[0];
> -
> - scu = intel_scu_ipc_probe(&pdev->dev, &pdata);
> - if (IS_ERR(scu))
> - return PTR_ERR(scu);
> -
> - pmc->dev = &pdev->dev;
> -
> - pci_set_drvdata(pdev, scu);
> -
> - return 0;
> -}
> -
> -static void ipc_pci_remove(struct pci_dev *pdev)
> -{
> - intel_scu_ipc_remove(pci_get_drvdata(pdev));
> - ipcdev.dev = NULL;
> -}
> -
> -static const struct pci_device_id ipc_pci_ids[] = {
> - {PCI_VDEVICE(INTEL, 0x0a94), 0},
> - {PCI_VDEVICE(INTEL, 0x1a94), 0},
> - {PCI_VDEVICE(INTEL, 0x5a94), 0},
> - { 0,}
> -};
> -MODULE_DEVICE_TABLE(pci, ipc_pci_ids);
> -
> -static struct pci_driver ipc_pci_driver = {
> - .name = "intel_pmc_ipc",
> - .id_table = ipc_pci_ids,
> - .probe = ipc_pci_probe,
> - .remove = ipc_pci_remove,
> -};
> -
> static ssize_t intel_pmc_ipc_simple_cmd_store(struct device *dev,
> struct device_attribute *attr,
> const char *buf, size_t count)
> @@ -697,25 +640,11 @@ static struct platform_driver ipc_plat_driver = {
>
> static int __init intel_pmc_ipc_init(void)
> {
> - int ret;
> -
> - ret = platform_driver_register(&ipc_plat_driver);
> - if (ret) {
> - pr_err("Failed to register PMC ipc platform driver\n");
> - return ret;
> - }
> - ret = pci_register_driver(&ipc_pci_driver);
> - if (ret) {
> - pr_err("Failed to register PMC ipc pci driver\n");
> - platform_driver_unregister(&ipc_plat_driver);
> - return ret;
> - }
> - return ret;
> + return platform_driver_register(&ipc_plat_driver);
> }
>
> static void __exit intel_pmc_ipc_exit(void)
> {
> - pci_unregister_driver(&ipc_pci_driver);
> platform_driver_unregister(&ipc_plat_driver);
> }
>
> diff --git a/drivers/platform/x86/intel_scu_pcidrv.c b/drivers/platform/x86/intel_scu_pcidrv.c
> index 42030bdb3e08..4f2a7ca5c5f7 100644
> --- a/drivers/platform/x86/intel_scu_pcidrv.c
> +++ b/drivers/platform/x86/intel_scu_pcidrv.c
> @@ -17,6 +17,7 @@
> static int intel_scu_pci_probe(struct pci_dev *pdev,
> const struct pci_device_id *id)
> {
> + void (*setup_fn)(void) = (void (*)(void))id->driver_data;
> struct intel_scu_ipc_pdata *pdata;
> struct intel_scu_ipc_dev *scu;
> int ret;
> @@ -40,14 +41,26 @@ static int intel_scu_pci_probe(struct pci_dev *pdev,
> if (IS_ERR(scu))
> return PTR_ERR(scu);
>
> - intel_scu_devices_create();
> + if (setup_fn)
> + setup_fn();
> return 0;
> }
>
> +static void intel_mid_scu_setup(void)
> +{
> + intel_scu_devices_create();
> +}
> +
> static const struct pci_device_id pci_ids[] = {
> - { PCI_VDEVICE(INTEL, 0x080e) },
> - { PCI_VDEVICE(INTEL, 0x08ea) },
> - { PCI_VDEVICE(INTEL, 0x11a0) },
> + { PCI_VDEVICE(INTEL, 0x080e),
> + .driver_data = (kernel_ulong_t)intel_mid_scu_setup },
> + { PCI_VDEVICE(INTEL, 0x08ea),
> + .driver_data = (kernel_ulong_t)intel_mid_scu_setup },
> + { PCI_VDEVICE(INTEL, 0x0a94) },
> + { PCI_VDEVICE(INTEL, 0x11a0),
> + .driver_data = (kernel_ulong_t)intel_mid_scu_setup },
> + { PCI_VDEVICE(INTEL, 0x1a94) },
> + { PCI_VDEVICE(INTEL, 0x5a94) },
> {}
> };
>
> --
> 2.24.1
>
--
With Best Regards,
Andy Shevchenko
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