LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Tomasz Nowicki <tomasz.nowicki@linaro.org>
To: bhelgaas@google.com, wangyijing@huawei.com, arnd@arndb.de,
	hanjun.guo@linaro.org, Liviu.Dudau@arm.com, tglx@linutronix.de,
	mingo@redhat.com, hpa@zytor.com, rjw@rjwysocki.net,
	al.stone@linaro.org
Cc: linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, x86@kernel.org,
	linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org,
	linaro-acpi@lists.linaro.org,
	Tomasz Nowicki <tomasz.nowicki@linaro.org>
Subject: [PATCH v3 8/9] pci, acpi, mcfg: Share ACPI PCI config space accessors.
Date: Tue, 10 Mar 2015 12:35:19 +0100	[thread overview]
Message-ID: <1425987320-15020-9-git-send-email-tomasz.nowicki@linaro.org> (raw)
In-Reply-To: <1425987320-15020-1-git-send-email-tomasz.nowicki@linaro.org>

MCFG can be used perfectly for all architectures which support ACPI.
ACPI mandates MCFG to describe PCI config space ranges which means
we should use MMCONFIG accessors by default.

Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org>
---
 drivers/acpi/mcfg.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/acpi/mcfg.c b/drivers/acpi/mcfg.c
index 1e646fc..e285f62 100644
--- a/drivers/acpi/mcfg.c
+++ b/drivers/acpi/mcfg.c
@@ -13,6 +13,26 @@
 
 #define	PREFIX	"MCFG: "
 
+/*
+ * raw_pci_read/write - ACPI PCI config space accessors.
+ *
+ * ACPI spec defines MCFG table as the way we can describe access to PCI config
+ * space, so let MCFG be default (__weak).
+ *
+ * If platform needs more fancy stuff, should provides its own implementation.
+ */
+int __weak raw_pci_read(unsigned int domain, unsigned int bus,
+			unsigned int devfn, int reg, int len, u32 *val)
+{
+	return pci_mmcfg_read(domain, bus, devfn, reg, len, val);
+}
+
+int __weak raw_pci_write(unsigned int domain, unsigned int bus,
+			 unsigned int devfn, int reg, int len, u32 val)
+{
+	return pci_mmcfg_write(domain, bus, devfn, reg, len, val);
+}
+
 static int __init acpi_mcfg_check_entry(struct acpi_table_mcfg *mcfg,
 					struct acpi_mcfg_allocation *cfg)
 {
-- 
1.9.1


  parent reply	other threads:[~2015-03-10 11:35 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-10 11:35 [PATCH v3 0/9] PCI: MMCONFIG clean up Tomasz Nowicki
2015-03-10 11:35 ` [PATCH v3 1/9] x86, pci: Clean up comment about buggy MMIO config space access for AMD Fam10h CPUs Tomasz Nowicki
2015-03-10 11:35 ` [PATCH v3 2/9] x86, pci: Abstract PCI config accessors and use AMD Fam10h workaround exclusively Tomasz Nowicki
2015-03-10 11:35 ` [PATCH v3 3/9] x86, pci: Reorder logic of pci_mmconfig_insert() function Tomasz Nowicki
2015-03-10 11:35 ` [PATCH v3 4/9] x86, pci, acpi: Move arch-agnostic MMCONFIG (aka ECAM) and ACPI code out of arch/x86/ directory Tomasz Nowicki
2015-03-13 16:35   ` Mark Salter
2015-03-16 14:38     ` Tomasz Nowicki
2015-03-10 11:35 ` [PATCH v3 5/9] pci, acpi, mcfg: Provide generic implementation of MCFG code initialization Tomasz Nowicki
2015-03-10 11:35 ` [PATCH v3 6/9] x86, pci: mmconfig_{32,64}.c code refactoring - remove code duplication Tomasz Nowicki
2015-03-10 11:35 ` [PATCH v3 7/9] x86, pci, ecam: mmconfig_64.c becomes default implementation for ECAM driver Tomasz Nowicki
2015-03-10 11:35 ` Tomasz Nowicki [this message]
2015-03-10 11:35 ` [PATCH v3 9/9] pci, ecam: Improve naming for ecam.c content and areas where it is used Tomasz Nowicki
2015-03-10 12:22   ` Tomasz Nowicki
2015-03-10 12:25   ` Tomasz Nowicki

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1425987320-15020-9-git-send-email-tomasz.nowicki@linaro.org \
    --to=tomasz.nowicki@linaro.org \
    --cc=Liviu.Dudau@arm.com \
    --cc=al.stone@linaro.org \
    --cc=arnd@arndb.de \
    --cc=bhelgaas@google.com \
    --cc=hanjun.guo@linaro.org \
    --cc=hpa@zytor.com \
    --cc=linaro-acpi@lists.linaro.org \
    --cc=linux-acpi@vger.kernel.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-pci@vger.kernel.org \
    --cc=mingo@redhat.com \
    --cc=rjw@rjwysocki.net \
    --cc=tglx@linutronix.de \
    --cc=wangyijing@huawei.com \
    --cc=x86@kernel.org \
    --subject='Re: [PATCH v3 8/9] pci, acpi, mcfg: Share ACPI PCI config space accessors.' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).