From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christopher Covington Subject: [PATCHv2] PCI: QDF2432 32 bit config space accessors Date: Wed, 21 Sep 2016 18:38:05 -0400 Message-ID: <20160921223805.21652-1-cov@codeaurora.org> References: <20160921173129.GA20006@localhost> Return-path: Received: from smtp.codeaurora.org ([198.145.29.96]:47949 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755762AbcIUWiX (ORCPT ); Wed, 21 Sep 2016 18:38:23 -0400 In-Reply-To: <20160921173129.GA20006@localhost> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Bjorn Helgaas Cc: Sinan Kaya , Tomasz Nowicki , will.deacon@arm.com, catalin.marinas@arm.com, rafael@kernel.org, Lorenzo.Pieralisi@arm.com, arnd@arndb.de, hanjun.guo@linaro.org, jchandra@broadcom.com, dhdang@apm.com, ard.biesheuvel@linaro.org, robert.richter@caviumnetworks.com, mw@semihalf.com, Liviu.Dudau@arm.com, ddaney@caviumnetworks.com, wangyijing@huawei.com, msalter@redhat.com, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linaro-acpi@lists.linaro.org, jcm@redhat.com, andrea.gallo@linaro.org, jeremy.linton@arm.com, liudongdong3@huawei.com, gabriele.paoloni@huawei.com, jhugo@codeaurora.org, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, Christopher Covington The Qualcomm Technologies QDF2432 SoC does not support accesses smaller than 32 bits to the PCI configuration space. Register the appropriate quirk. Signed-off-by: Christopher Covington --- drivers/acpi/pci_mcfg.c | 8 ++++++++ drivers/pci/ecam.c | 10 ++++++++++ include/linux/pci-ecam.h | 1 + 3 files changed, 19 insertions(+) diff --git a/drivers/acpi/pci_mcfg.c b/drivers/acpi/pci_mcfg.c index 245b79f..212334f 100644 --- a/drivers/acpi/pci_mcfg.c +++ b/drivers/acpi/pci_mcfg.c @@ -96,6 +96,14 @@ static struct mcfg_fixup mcfg_quirks[] = { THUNDER_ECAM_MCFG(2, 12), THUNDER_ECAM_MCFG(2, 13), #endif + { "QCOM ", "QDF2432 ", 1, 0, MCFG_BUS_ANY, &pci_32b_ops }, + { "QCOM ", "QDF2432 ", 1, 1, MCFG_BUS_ANY, &pci_32b_ops }, + { "QCOM ", "QDF2432 ", 1, 2, MCFG_BUS_ANY, &pci_32b_ops }, + { "QCOM ", "QDF2432 ", 1, 3, MCFG_BUS_ANY, &pci_32b_ops }, + { "QCOM ", "QDF2432 ", 1, 4, MCFG_BUS_ANY, &pci_32b_ops }, + { "QCOM ", "QDF2432 ", 1, 5, MCFG_BUS_ANY, &pci_32b_ops }, + { "QCOM ", "QDF2432 ", 1, 6, MCFG_BUS_ANY, &pci_32b_ops }, + { "QCOM ", "QDF2432 ", 1, 7, MCFG_BUS_ANY, &pci_32b_ops }, }; static char mcfg_oem_id[ACPI_OEM_ID_SIZE]; diff --git a/drivers/pci/ecam.c b/drivers/pci/ecam.c index 43ed08d..c3b3063 100644 --- a/drivers/pci/ecam.c +++ b/drivers/pci/ecam.c @@ -162,3 +162,13 @@ struct pci_ecam_ops pci_generic_ecam_ops = { .write = pci_generic_config_write, } }; + +/* ops for 32 bit config space access quirk */ +struct pci_ecam_ops pci_32b_ops = { + .bus_shift = 20, + .pci_ops = { + .map_bus = pci_ecam_map_bus, + .read = pci_generic_config_read32, + .write = pci_generic_config_write32, + } +}; diff --git a/include/linux/pci-ecam.h b/include/linux/pci-ecam.h index 35f0e81..a6cffb8 100644 --- a/include/linux/pci-ecam.h +++ b/include/linux/pci-ecam.h @@ -65,6 +65,7 @@ extern struct pci_ecam_ops pci_thunder_pem_ops; #ifdef CONFIG_PCI_HOST_THUNDER_ECAM extern struct pci_ecam_ops pci_thunder_ecam_ops; #endif +extern struct pci_ecam_ops pci_32b_ops; #ifdef CONFIG_PCI_HOST_GENERIC /* for DT-based PCI controllers that support ECAM */ -- Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc. Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.