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
prev 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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