From patchwork Fri Mar 29 09:09:26 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 13610376 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 requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8C044CD128E for ; Fri, 29 Mar 2024 09:10:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=0VqnfwXEaS7kRYhjF1NyuooZFKZg39txS528dvQicj0=; b=pv99gWwu1WONW0 EgDJNaWI3cMbFojZnPsxjkXcU9pdEcKnApZpjI0q7W4PqtmzQ5ofvP2bSvf9TOnDneIfgvdhXuuMx qWR+sJtDzSyWN5qeguj8quACcjOILLTQ30SSp3kprDSPzqAD4oVrhwVosxe02/pQ+5VezS7LgtZWn tzLeXPJEaxzVaiR96PVDbOdKZn6k6OZd9cDF4rE1pzyWXcJnlA3eeEkWAkplzMWaLef4BTAWyeuPh rocWnxTYMbTw68GUnYKuRrTGzGetOxDLC9No/NtxPcqEBT5GNluOUXKnb6NPXOViamYmynUdmDc+G SrHnf8ROaC0IF6pyUefQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rq8FE-0000000HQ2T-3a0F; Fri, 29 Mar 2024 09:09:52 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rq8FB-0000000HQ0C-0PhC for linux-rockchip@lists.infradead.org; Fri, 29 Mar 2024 09:09:50 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 843E1618CC; Fri, 29 Mar 2024 09:09:48 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 07566C433F1; Fri, 29 Mar 2024 09:09:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1711703388; bh=Dns6q7IizAxpZ6/WuC6UXLxjt1Ab4FRhj9skuvhtcic=; h=From:To:Cc:Subject:Date:From; b=Veru5V0jW0B9aV4qODEM6vLN3soCI9Vs2g3Gaxwt4l7zuJcqOjKHrDfdil0lv0aiq kn3v2M2GTxvzWo1/T5sNi+MMvamoSqEFtRnAOCINLltfftE8THGQRADmfQanGUIjjN RVoOcqVpPFqWfM/bLAbLNMIYAVoDGxQUfTZznMod8pOTBHss8slIb2OLWkxprMzPPt haP+Wviagu6j0Rj/rhXNWfWhY203vmFJfzE14bbVsTQl6FKKw1keBdZ+5JGhCEkU/l gy5Bu5eDhw+T3+hCDzisMRWR4CjBa7yVUpzWmjwa6nEcp37bod3lCsQ6eRCIbKWS+D WLr2zo8wJvscA== From: Damien Le Moal To: Manivannan Sadhasivam , Kishon Vijay Abraham I , Shawn Lin , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , Bjorn Helgaas , Heiko Stuebner , linux-pci@vger.kernel.org Cc: linux-rockchip@lists.infradead.org Subject: [PATCH 00/19] Improve PCI memory mapping API Date: Fri, 29 Mar 2024 18:09:26 +0900 Message-ID: <20240329090945.1097609-1-dlemoal@kernel.org> X-Mailer: git-send-email 2.44.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240329_020949_267667_C615C752 X-CRM114-Status: GOOD ( 13.94 ) 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: , Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org 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 and 2 tidy up the epc core code - Patch 3 and 4 introduces the new endpoint controller method and epc functions. - Patch 5 to 7 modify the test endpoint driver to use these new functions and improve the code of this driver. - Finally, Patch 8 to 19 fix the rk3399 endpoint driver, defining a .map_align method for it and improving its overall code readability and features. Damien Le Moal (18): PCI: endpoint: Introduce pci_epc_check_func() PCI: endpoint: Improve pci_epc_mem_alloc_addr() 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 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_info endpoint controller operation PCI: rockchip-ep: Refactor rockchip_pcie_ep_probe() memory allocations PCI: rockchip-ep: Refactor rockchip_pcie_ep_probe() MSIX 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 | 395 ++++++++++++++---- 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 | 212 +++++++--- drivers/pci/endpoint/pci-epc-mem.c | 9 +- include/linux/pci-epc.h | 39 ++ 8 files changed, 774 insertions(+), 313 deletions(-)