Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933310AbaD1WG0 (ORCPT ); Mon, 28 Apr 2014 18:06:26 -0400 Received: from mga02.intel.com ([134.134.136.20]:43858 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933195AbaD1WFY (ORCPT ); Mon, 28 Apr 2014 18:05:24 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.97,946,1389772800"; d="scan'208";a="502535821" From: Jacob Pan To: Linux PM , Rafael Wysocki , LKML Cc: "David E. Box" , Alan Cox , Durgadoss R , Kristen Carlson Accardi , "H. Peter Anvin" Subject: [PATCH 3/5] x86, iosf: Add dummy functions for loadable modules Date: Mon, 28 Apr 2014 07:04:38 -0700 Message-Id: <1398693880-13428-4-git-send-email-jacob.jun.pan@linux.intel.com> X-Mailer: git-send-email 1.8.1.2 In-Reply-To: <1398693880-13428-1-git-send-email-jacob.jun.pan@linux.intel.com> References: <1398693880-13428-1-git-send-email-jacob.jun.pan@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "David E. Box" Some loadable modules only need IOSF access on the platforms where it exists. Provide dummy functions to allow these modules to compile and load on the platforms where it doesn't exist. Signed-off-by: David E. Box Link: http://lkml.kernel.org/r/1393641652-7222-2-git-send-email-david.e.box@linux.intel.com Signed-off-by: H. Peter Anvin --- arch/x86/include/asm/iosf_mbi.h | 33 +++++++++++++++++++++++++++++++++ arch/x86/kernel/iosf_mbi.c | 6 ++++++ 2 files changed, 39 insertions(+) diff --git a/arch/x86/include/asm/iosf_mbi.h b/arch/x86/include/asm/iosf_mbi.h index 8e71c79..9fc5402 100644 --- a/arch/x86/include/asm/iosf_mbi.h +++ b/arch/x86/include/asm/iosf_mbi.h @@ -5,6 +5,8 @@ #ifndef IOSF_MBI_SYMS_H #define IOSF_MBI_SYMS_H +#ifdef CONFIG_IOSF_MBI + #define MBI_MCR_OFFSET 0xD0 #define MBI_MDR_OFFSET 0xD4 #define MBI_MCRX_OFFSET 0xD8 @@ -50,6 +52,8 @@ #define BT_MBI_PCIE_READ 0x00 #define BT_MBI_PCIE_WRITE 0x01 +bool iosf_mbi_available(void); + /** * iosf_mbi_read() - MailBox Interface read command * @port: port indicating subunit being accessed @@ -87,4 +91,33 @@ int iosf_mbi_write(u8 port, u8 opcode, u32 offset, u32 mdr); */ int iosf_mbi_modify(u8 port, u8 opcode, u32 offset, u32 mdr, u32 mask); +#else /* CONFIG_IOSF_MBI is not enabled */ +static inline +bool iosf_mbi_available(void) +{ + return false; +} + +static inline +int iosf_mbi_read(u8 port, u8 opcode, u32 offset, u32 *mdr) +{ + WARN(); + return -EPERM; +} + +static inline +int iosf_mbi_write(u8 port, u8 opcode, u32 offset, u32 mdr) +{ + WARN(); + return -EPERM; +} + +static inline +int iosf_mbi_modify(u8 port, u8 opcode, u32 offset, u32 mdr, u32 mask) +{ + WARN(); + return -EPERM; +} +#endif /* CONFIG_IOSF_MBI */ + #endif /* IOSF_MBI_SYMS_H */ diff --git a/arch/x86/kernel/iosf_mbi.c b/arch/x86/kernel/iosf_mbi.c index c3aae66..d3803c6 100644 --- a/arch/x86/kernel/iosf_mbi.c +++ b/arch/x86/kernel/iosf_mbi.c @@ -177,6 +177,12 @@ int iosf_mbi_modify(u8 port, u8 opcode, u32 offset, u32 mdr, u32 mask) } EXPORT_SYMBOL(iosf_mbi_modify); +bool iosf_mbi_available(void) +{ + return mbi_pdev; +} +EXPORT_SYMBOL(iosf_mbi_available); + static int iosf_mbi_probe(struct pci_dev *pdev, const struct pci_device_id *unused) { -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/