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charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20240330041928.1555578-1-dlemoal@kernel.org> On Sat, Mar 30, 2024 at 01:19:10PM +0900, Damien Le Moal wrote: > This series introduces the new functions pci_epc_map_align(), > pci_epc_mem_map() and pci_epc_mem_unmap() to improve handling of the > PCI address mapping alignment constraints of endpoint controllers in a > controller independent manner. > > The issue fixed is that the fixed alignment defined by the "align" field > of struct pci_epc_features assumes that the alignment of the endpoint > memory used to map a RC PCI address range is independent of the PCI > address being mapped. But that is not the case for the rk3399 SoC > controller: in endpoint mode, this controller uses the lower bits of the > local endpoint memory address as the lower bits for the PCI addresses > for data transfers. That is, when mapping local memory, one must take > into account the number of bits of the RC PCI address that change from > the start address of the mapping. > > To fix this, the new endpoint controller method .map_align is introduced > and called from pci_epc_map_align(). This method is optional and for > controllers that do not define it, the mapping information returned > is based of the fixed alignment constraint as defined by the align > feature. > > The functions pci_epc_mem_map() is a helper function which obtains > mapping information, allocates endpoint controller memory according to > the mapping size obtained and maps the memory. pci_epc_mem_map() unmaps > and frees the endpoint memory. > > This series is organized as follows: > - Patch 1 tidy up the epc core code > - Patch 2 and 3 introduce the new map_align endpoint controller method > and related epc functions. > - Patch 4 to 6 modify the test endpoint driver to use these new > functions and improve the code of this driver. While posting the next version, please split the endpoint patches into a separate series. It helps in code review and can be applied separately. - Mani > - Finally, Patch 7 to 18 fix the rk3399 endpoint driver, defining a > .map_align method for it and improving its overall code readability > and features. > > Changes from v1: > - Changed pci_epc_check_func() to pci_epc_function_is_valid() in patch > 1. > - Removed patch "PCI: endpoint: Improve pci_epc_mem_alloc_addr()" > (former patch 2 of v1) > - Various typos cleanups all over. Also fixed some blank space > indentation. > - Added review tags > > Damien Le Moal (17): > PCI: endpoint: Introduce pci_epc_function_is_valid() > PCI: endpoint: Introduce pci_epc_map_align() > PCI: endpoint: Introduce pci_epc_mem_map()/unmap() > PCI: endpoint: test: Use pci_epc_mem_map/unmap() > PCI: endpoint: test: Synchronously cancel command handler work > PCI: endpoint: test: Implement link_down event operation > PCI: rockchip-ep: Fix address translation unit programming > PCI: rockchip-ep: Use a macro to define EP controller .align feature > PCI: rockchip-ep: Improve rockchip_pcie_ep_unmap_addr() > PCI: rockchip-ep: Improve rockchip_pcie_ep_map_addr() > PCI: rockchip-ep: Implement the map_align endpoint controller operation > PCI: rockchip-ep: Refactor rockchip_pcie_ep_probe() memory allocations > PCI: rockchip-ep: Refactor rockchip_pcie_ep_probe() MSI-X hiding > PCI: rockchip-ep: Refactor endpoint link training enable > PCI: rockship-ep: Introduce rockchip_pcie_ep_stop() > PCI: rockchip-ep: Improve link training > PCI: rockchip-ep: Handle PERST# signal in endpoint mode > > Wilfred Mallawa (1): > dt-bindings: pci: rockchip,rk3399-pcie-ep: Add ep-gpios property > > .../bindings/pci/rockchip,rk3399-pcie-ep.yaml | 3 + > drivers/pci/controller/pcie-rockchip-ep.c | 393 ++++++++++++++---- > drivers/pci/controller/pcie-rockchip.c | 17 +- > drivers/pci/controller/pcie-rockchip.h | 22 + > drivers/pci/endpoint/functions/pci-epf-test.c | 390 +++++++++-------- > drivers/pci/endpoint/pci-epc-core.c | 213 +++++++--- > include/linux/pci-epc.h | 39 ++ > 7 files changed, 768 insertions(+), 309 deletions(-) > > -- > 2.44.0 > -- மணிவண்ணன் சதாசிவம் From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate 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=?utf-8?Q?Wilczy=C5=84ski?= , Bjorn Helgaas , Heiko Stuebner , linux-pci@vger.kernel.org, Rob Herring , Krzysztof Kozlowski , Conor Dooley , devicetree@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Rick Wertenbroek , Wilfred Mallawa , Niklas Cassel Subject: Re: [PATCH v2 00/18] Improve PCI memory mapping API Message-ID: <20240403075034.GF25309@thinkpad> References: <20240330041928.1555578-1-dlemoal@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20240330041928.1555578-1-dlemoal@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240403_005042_696703_F7415B72 X-CRM114-Status: GOOD ( 27.05 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" 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(version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Apr 2024 00:50:39 -0700 (PDT) Date: Wed, 3 Apr 2024 13:20:34 +0530 From: Manivannan Sadhasivam To: Damien Le Moal Cc: Lorenzo Pieralisi , Kishon Vijay Abraham I , Shawn Lin , Krzysztof =?utf-8?Q?Wilczy=C5=84ski?= , Bjorn Helgaas , Heiko Stuebner , linux-pci@vger.kernel.org, Rob Herring , Krzysztof Kozlowski , Conor Dooley , devicetree@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Rick Wertenbroek , Wilfred Mallawa , Niklas Cassel Subject: Re: [PATCH v2 00/18] Improve PCI memory mapping API Message-ID: <20240403075034.GF25309@thinkpad> References: <20240330041928.1555578-1-dlemoal@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20240330041928.1555578-1-dlemoal@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240403_005042_720677_784779EE X-CRM114-Status: GOOD ( 28.30 ) X-BeenThere: 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