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From: Dongdong Liu <liudongdong3@huawei.com>
To: <helgaas@kernel.org>, <arnd@arndb.de>, <will.deacon@arm.com>,
	<catalin.marinas@arm.com>, <rafael@kernel.org>,
	<hanjun.guo@linaro.org>, <Lorenzo.Pieralisi@arm.com>,
	<okaya@codeaurora.org>, <jchandra@broadcom.com>,
	<tn@semihalf.com>
Cc: <robert.richter@caviumnetworks.com>, <mw@semihalf.com>,
	<Liviu.Dudau@arm.com>, <ddaney@caviumnetworks.com>,
	<wangyijing@huawei.com>, <Suravee.Suthikulpanit@amd.com>,
	<msalter@redhat.com>, <linux-pci@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-acpi@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<linaro-acpi@lists.linaro.org>, <jcm@redhat.com>,
	<andrea.gallo@linaro.org>, <dhdang@apm.com>,
	<jeremy.linton@arm.com>, <liudongdong3@huawei.com>,
	<cov@codeaurora.org>, <gabriele.paoloni@huawei.com>,
	<charles.chenxin@huawei.com>, <linuxarm@huawei.com>
Subject: [RFC PATCH V2 2/2] ARM64/PCI: Start using quirks handling for ACPI based PCI host controller
Date: Mon, 13 Jun 2016 21:02:03 +0800	[thread overview]
Message-ID: <1465822923-33599-3-git-send-email-liudongdong3@huawei.com> (raw)
In-Reply-To: <1465822923-33599-1-git-send-email-liudongdong3@huawei.com>

From: Tomasz Nowicki <tn@semihalf.com>

pci_generic_ecam_ops is used by default. Since there are platforms
which have non-compliant ECAM space we need to overwrite these
accessors prior to PCI buses enumeration. In order to do that
we call pci_mcfg_get_ops to retrieve pci_ecam_ops structure so that
we can use proper PCI config space accessors and bus_shift.

pci_generic_ecam_ops is still used for platforms free from quirks.

Signed-off-by: Tomasz Nowicki <tn@semihalf.com>
---
 arch/arm64/kernel/pci.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c
index 94cd43c..a891bda 100644
--- a/arch/arm64/kernel/pci.c
+++ b/arch/arm64/kernel/pci.c
@@ -139,6 +139,7 @@ pci_acpi_setup_ecam_mapping(struct acpi_pci_root *root)
 	struct pci_config_window *cfg;
 	struct resource cfgres;
 	unsigned int bsz;
+	struct pci_ecam_ops *ops;
 
 	/* Use address from _CBA if present, otherwise lookup MCFG */
 	if (!root->mcfg_addr)
@@ -150,12 +151,12 @@ pci_acpi_setup_ecam_mapping(struct acpi_pci_root *root)
 		return NULL;
 	}
 
-	bsz = 1 << pci_generic_ecam_ops.bus_shift;
+	ops = pci_mcfg_get_ops(root);
+	bsz = 1 << ops->bus_shift;
 	cfgres.start = root->mcfg_addr + bus_res->start * bsz;
 	cfgres.end = cfgres.start + resource_size(bus_res) * bsz - 1;
 	cfgres.flags = IORESOURCE_MEM;
-	cfg = pci_ecam_create(&root->device->dev, &cfgres, bus_res,
-			      &pci_generic_ecam_ops);
+	cfg = pci_ecam_create(&root->device->dev, &cfgres, bus_res, ops);
 	if (IS_ERR(cfg)) {
 		dev_err(&root->device->dev, "%04x:%pR error %ld mapping ECAM\n",
 			seg, bus_res, PTR_ERR(cfg));
-- 
1.9.1

      parent reply	other threads:[~2016-06-13 12:50 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-13 13:02 [RFC PATCH V2 0/2] ECAM quirks handling for ARM64 platforms Dongdong Liu
2016-06-13 13:02 ` [RFC PATCH V2 1/2] ACPI/PCI: Match PCI config space accessors against platfrom specific ECAM quirks Dongdong Liu
2016-06-13 13:54   ` Gabriele Paoloni
2016-06-13 14:02     ` Sinan Kaya
2016-06-13 14:29       ` Gabriele Paoloni
2016-06-13 15:12         ` okaya
2016-06-13 15:59           ` Jeffrey Hugo
2016-06-13 21:07             ` Duc Dang
2016-06-16  6:31     ` [Linaro-acpi] " Jon Masters
2016-06-16  7:45       ` Duc Dang
2016-06-16  7:54         ` Jon Masters
2016-06-13 15:47   ` Christopher Covington
2016-06-13 20:57     ` Duc Dang
2016-06-14  5:51       ` Dongdong Liu
2016-06-14  9:00         ` Duc Dang
2016-06-14  9:45           ` Dongdong Liu
2016-06-14 11:52             ` Tomasz Nowicki
2016-06-14 17:43               ` Duc Dang
2016-06-13 13:02 ` Dongdong Liu [this message]

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