From patchwork Wed Jun 12 10:57:55 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Conor Dooley X-Patchwork-Id: 13694817 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 4E22EC27C53 for ; Wed, 12 Jun 2024 10:58:32 +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:References:In-Reply-To: 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: List-Owner; bh=lo3zgvc2LJlW/HATLihpda2DCx+SCh45GJYKbaXTwdE=; b=rQv1sW3VRaqfef rLwswzy2u1Yx19H7hkuqa0fTMuia+mYLIOdeR/ABX7IAPdgONDxk7N0ycsUDvg4bf2zXemXuvtREO N9To+Wtborj/c7NwHSiHnUotAqKmOD1T2CaRJwz9PQU5yI2zTMA84Ka1ILBrQ0MSYNfy/KNk6G2Ox ODP6OFPI9fBJE/I77jzw1X+1uqA9qx0bkvLsw9Wsb2ikYBlDKd7MxWvuaPmaXw7OKOFIH+iBauvHH tan4Y09SYvxPt/4yQi0MpqlIBU1kTf3/K5vvb2wY9mwf5vulmeqs9C5DuWew9Hpd+OpIZIjg7sPCd +4XdTCuQyxrfNZSwcgcQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sHLgP-0000000CMV3-1pFO; Wed, 12 Jun 2024 10:58:25 +0000 Received: from sin.source.kernel.org ([2604:1380:40e1:4800::1]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sHLgM-0000000CMTJ-11EN for linux-riscv@lists.infradead.org; Wed, 12 Jun 2024 10:58:23 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sin.source.kernel.org (Postfix) with ESMTP id 209EFCE1F8D; Wed, 12 Jun 2024 10:58:20 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A5CF8C3277B; Wed, 12 Jun 2024 10:58:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1718189899; bh=+Yi0jjqYfBbPxGRxZzY+ydtBuIsu5wJYIHZ0/rprn7c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QE7yr0fqlGqUra8NvcJqz8fEb05PxaxRaIiPChvuQ0zjoRbH0Ly0wgVg0mXO7Voze RCH/dTrjdgsunXEXv/6wm+ImmlRt+zPh6mtOa6gvpg7hpd62DRcWpqmjK6c4wqW8sq GthMj6ppfwAvSm9Gcgn961NusEuydmAUh3GtQSLRv74a7DejfqpdTiA43WQdJieLsj /oYMm+Ee84hfgR/sTU3n/nHpTdNLVrlAFZUf9a1YTH1x64v3/UXhlWqsJneUVdN9Uy YOH4H1+Mbuz/0AwOCKjBbRluYvDaT70/1GSikcBA5Y6plGurnAXO3cyqXYQ9igSt7g q7YgFPKNplnfQ== From: Conor Dooley To: linux-pci@vger.kernel.org Cc: conor@kernel.org, Conor Dooley , Daire McNamara , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy=C5=84?= =?utf-8?q?ski?= , Rob Herring , Bjorn Helgaas , Krzysztof Kozlowski , Conor Dooley , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, Krzysztof Kozlowski Subject: [PATCH v2 1/2] dt-bindings: PCI: microchip,pcie-host: fix reg properties Date: Wed, 12 Jun 2024 11:57:55 +0100 Message-ID: <20240612-shrubs-liquid-95ed126a5544@spud> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240612-outfield-gummy-388a36d95100@spud> References: <20240612-outfield-gummy-388a36d95100@spud> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2276; i=conor.dooley@microchip.com; h=from:subject:message-id; bh=1DNLyBuR4XfdD95GkmoKOfrX8zMMBVl6oGQVomfer1w=; b=owGbwMvMwCFWscWwfUFT0iXG02pJDGmZ9cbzrr3dFpsc2LEhdN3bb1v8Ll8//v6j5MFNna+/N 8e/TzI61VHKwiDGwSArpsiSeLuvRWr9H5cdzj1vYeawMoEMYeDiFICJWIow/OH+pJGQlGF0zuIW m3USlz/v3LKpTyu3Zi+98qRjU7HM1m2MDPdWPtLiC86S6EwtEXD5er4zMfPIn/WaF9SjTqXL2OZ cYQEA X-Developer-Key: i=conor.dooley@microchip.com; a=openpgp; fpr=F9ECA03CF54F12CD01F1655722E2C55B37CF380C X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240612_035822_670566_AF4AA6C2 X-CRM114-Status: GOOD ( 10.98 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org From: Conor Dooley The PCI host controller on PolarFire SoC has multiple "instances", each with their own bridge and ctrl address spaces. The original binding has an "apb" register region, and it is expected to be set to the base address of the host controllers register space. Some defines in the Linux driver were used to compute the addresses of the bridge and ctrl address ranges corresponding to instance1. Some customers want to use instance2 however and that requires changing the defines in the driver, which is clearly not a portable solution. Remove this "apb" register region from the binding and add "bridge" & "ctrl" regions instead, that will directly communicate the address of these regions Fixes: 6ee6c89aac35 ("dt-bindings: PCI: microchip: Add Microchip PolarFire host binding") Acked-by: Krzysztof Kozlowski Signed-off-by: Conor Dooley --- .../devicetree/bindings/pci/microchip,pcie-host.yaml | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/Documentation/devicetree/bindings/pci/microchip,pcie-host.yaml b/Documentation/devicetree/bindings/pci/microchip,pcie-host.yaml index 5d7aec5f54e7..45c14b6e4aa4 100644 --- a/Documentation/devicetree/bindings/pci/microchip,pcie-host.yaml +++ b/Documentation/devicetree/bindings/pci/microchip,pcie-host.yaml @@ -18,12 +18,13 @@ properties: const: microchip,pcie-host-1.0 # PolarFire reg: - maxItems: 2 + maxItems: 3 reg-names: items: - const: cfg - - const: apb + - const: bridge + - const: ctrl clocks: description: @@ -115,8 +116,9 @@ examples: pcie0: pcie@2030000000 { compatible = "microchip,pcie-host-1.0"; reg = <0x0 0x70000000 0x0 0x08000000>, - <0x0 0x43000000 0x0 0x00010000>; - reg-names = "cfg", "apb"; + <0x0 0x43008000 0x0 0x00002000>, + <0x0 0x4300a000 0x0 0x00002000>; + reg-names = "cfg", "bridge", "ctrl"; device_type = "pci"; #address-cells = <3>; #size-cells = <2>; From patchwork Wed Jun 12 10:57:56 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Conor Dooley X-Patchwork-Id: 13694818 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 ED4FEC27C53 for ; Wed, 12 Jun 2024 10:58:35 +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:References:In-Reply-To: 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: List-Owner; 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Wed, 12 Jun 2024 10:58:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1718189905; bh=C+G9VIZy3PKRr8Ug3IHBrNH/NTbO2Ssexu7rBij0/gE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JGmTsRanWD8ghFiITuIi6xce3jqRLFK/fRytHuEBsQcC7kqt0ZJR8M6XtxhwOmPAN y8mgAQniiGscJeFZqSz59DQiiytxskXSXiLpJd7RL5/9Is9xOiCN2GdgnoDhirOe7R YNCVJ8W++P1hD8YRCoJ4Iys+tdz/CuzKBYPQFWDCcS8zAme/+TvxlTzGQKW1jgRurP UB+XIKv9ANB0B8ITaJDy5z3OsjroytUQWzpLnCdJBZYGO5AHa/xzL7b3FS/6upOeaq wHIZ5eJkzIe53w+pf2j07Jkx7YOQqmFndmyt7CNw14XPkbziJj9I3kVg4dh4Zaaluq E1hfDvAxcQ7rQ== From: Conor Dooley To: linux-pci@vger.kernel.org Cc: conor@kernel.org, Conor Dooley , Daire McNamara , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy=C5=84?= =?utf-8?q?ski?= , Rob Herring , Bjorn Helgaas , Krzysztof Kozlowski , Conor Dooley , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org Subject: [PATCH v2 2/2] PCI: microchip: rework reg region handing to support using either instance 1 or 2 Date: Wed, 12 Jun 2024 11:57:56 +0100 Message-ID: <20240612-outweigh-headphone-740a7c59f3c9@spud> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240612-outfield-gummy-388a36d95100@spud> References: <20240612-outfield-gummy-388a36d95100@spud> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=16962; i=conor.dooley@microchip.com; h=from:subject:message-id; bh=eNUtLsfgxzFtQ3t1alz/QdzyCc+uKLZ/5rUJCnkHtG4=; b=owGbwMvMwCFWscWwfUFT0iXG02pJDGmZ9cYJlk0lKzaIBdaFZUmf0DTbe5jJjp1Z8Xh50ubn7 5j2HdjeUcrCIMbBICumyJJ4u69Fav0flx3OPW9h5rAygQxh4OIUgInIczH8L5yw9F761curHvz5 eH2t+5X9sSsyrpz7qPpIxnd6y1TeoHkM/ytNe27ky9iKsi5dk3XbxoFZ0bx6XpL8fgUjdbb/HY9 4GAE= X-Developer-Key: i=conor.dooley@microchip.com; a=openpgp; fpr=F9ECA03CF54F12CD01F1655722E2C55B37CF380C X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240612_035828_542215_A750761B X-CRM114-Status: GOOD ( 22.55 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org From: Conor Dooley The PCI host controller on PolarFire SoC has multiple "instances", each with their own bridge and ctrl address spaces. The original binding has an "apb" register region, and it is expected to be set to the base address of the host controllers register space. Defines in the driver were used to compute the addresses of the bridge and ctrl address ranges corresponding to instance1. Some customers want to use instance0 however and that requires changing the defines in the driver, which is clearly not a portable solution. The binding has been changed from a single register region to a pair, corresponding to the bridge and ctrl regions respectively, so modify the driver to read these regions directly from the devicetree rather than compute them from the base address of the abp region. To maintain backwards compatibility with the existing binding, the driver retains code to handle the "abp" reg and computes the base address of the bridge and ctrl regions using the defines if it is present. reg-names has always been a required property, so this is safe to do. Signed-off-by: Conor Dooley --- drivers/pci/controller/pcie-microchip-host.c | 155 +++++++++---------- 1 file changed, 73 insertions(+), 82 deletions(-) diff --git a/drivers/pci/controller/pcie-microchip-host.c b/drivers/pci/controller/pcie-microchip-host.c index 137fb8570ba2..2580a5bd2743 100644 --- a/drivers/pci/controller/pcie-microchip-host.c +++ b/drivers/pci/controller/pcie-microchip-host.c @@ -27,9 +27,6 @@ #define MC_PCIE1_BRIDGE_ADDR 0x00008000u #define MC_PCIE1_CTRL_ADDR 0x0000a000u -#define MC_PCIE_BRIDGE_ADDR (MC_PCIE1_BRIDGE_ADDR) -#define MC_PCIE_CTRL_ADDR (MC_PCIE1_CTRL_ADDR) - /* PCIe Bridge Phy Regs */ #define PCIE_PCI_IRQ_DW0 0xa8 #define MSIX_CAP_MASK BIT(31) @@ -207,7 +204,6 @@ [EVENT_LOCAL_ ## x] = { __stringify(x), s } #define PCIE_EVENT(x) \ - .base = MC_PCIE_CTRL_ADDR, \ .offset = PCIE_EVENT_INT, \ .mask_offset = PCIE_EVENT_INT, \ .mask_high = 1, \ @@ -215,7 +211,6 @@ .enb_mask = PCIE_EVENT_INT_ENB_MASK #define SEC_EVENT(x) \ - .base = MC_PCIE_CTRL_ADDR, \ .offset = SEC_ERROR_INT, \ .mask_offset = SEC_ERROR_INT_MASK, \ .mask = SEC_ERROR_INT_ ## x ## _INT, \ @@ -223,7 +218,6 @@ .enb_mask = 0 #define DED_EVENT(x) \ - .base = MC_PCIE_CTRL_ADDR, \ .offset = DED_ERROR_INT, \ .mask_offset = DED_ERROR_INT_MASK, \ .mask_high = 1, \ @@ -231,7 +225,6 @@ .enb_mask = 0 #define LOCAL_EVENT(x) \ - .base = MC_PCIE_BRIDGE_ADDR, \ .offset = ISTATUS_LOCAL, \ .mask_offset = IMASK_LOCAL, \ .mask_high = 0, \ @@ -265,7 +258,8 @@ struct mc_msi { }; struct mc_pcie { - void __iomem *axi_base_addr; + void __iomem *bridge_base_addr; + void __iomem *ctrl_base_addr; struct device *dev; struct irq_domain *intx_domain; struct irq_domain *event_domain; @@ -344,7 +338,6 @@ static struct event_map local_status_to_event[] = { }; static struct { - u32 base; u32 offset; u32 mask; u32 shift; @@ -415,18 +408,17 @@ static void mc_handle_msi(struct irq_desc *desc) struct irq_chip *chip = irq_desc_get_chip(desc); struct device *dev = port->dev; struct mc_msi *msi = &port->msi; - void __iomem *bridge_base_addr = - port->axi_base_addr + MC_PCIE_BRIDGE_ADDR; unsigned long status; u32 bit; int ret; chained_irq_enter(chip, desc); - status = readl_relaxed(bridge_base_addr + ISTATUS_LOCAL); + status = readl_relaxed(port->bridge_base_addr + ISTATUS_LOCAL); if (status & PM_MSI_INT_MSI_MASK) { - writel_relaxed(status & PM_MSI_INT_MSI_MASK, bridge_base_addr + ISTATUS_LOCAL); - status = readl_relaxed(bridge_base_addr + ISTATUS_MSI); + writel_relaxed(status & PM_MSI_INT_MSI_MASK, + port->bridge_base_addr + ISTATUS_LOCAL); + status = readl_relaxed(port->bridge_base_addr + ISTATUS_MSI); for_each_set_bit(bit, &status, msi->num_vectors) { ret = generic_handle_domain_irq(msi->dev_domain, bit); if (ret) @@ -441,11 +433,9 @@ static void mc_handle_msi(struct irq_desc *desc) static void mc_msi_bottom_irq_ack(struct irq_data *data) { struct mc_pcie *port = irq_data_get_irq_chip_data(data); - void __iomem *bridge_base_addr = - port->axi_base_addr + MC_PCIE_BRIDGE_ADDR; u32 bitpos = data->hwirq; - writel_relaxed(BIT(bitpos), bridge_base_addr + ISTATUS_MSI); + writel_relaxed(BIT(bitpos), port->bridge_base_addr + ISTATUS_MSI); } static void mc_compose_msi_msg(struct irq_data *data, struct msi_msg *msg) @@ -564,15 +554,13 @@ static void mc_handle_intx(struct irq_desc *desc) struct mc_pcie *port = irq_desc_get_handler_data(desc); struct irq_chip *chip = irq_desc_get_chip(desc); struct device *dev = port->dev; - void __iomem *bridge_base_addr = - port->axi_base_addr + MC_PCIE_BRIDGE_ADDR; unsigned long status; u32 bit; int ret; chained_irq_enter(chip, desc); - status = readl_relaxed(bridge_base_addr + ISTATUS_LOCAL); + status = readl_relaxed(port->bridge_base_addr + ISTATUS_LOCAL); if (status & PM_MSI_INT_INTX_MASK) { status &= PM_MSI_INT_INTX_MASK; status >>= PM_MSI_INT_INTX_SHIFT; @@ -590,42 +578,36 @@ static void mc_handle_intx(struct irq_desc *desc) static void mc_ack_intx_irq(struct irq_data *data) { struct mc_pcie *port = irq_data_get_irq_chip_data(data); - void __iomem *bridge_base_addr = - port->axi_base_addr + MC_PCIE_BRIDGE_ADDR; u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT); - writel_relaxed(mask, bridge_base_addr + ISTATUS_LOCAL); + writel_relaxed(mask, port->bridge_base_addr + ISTATUS_LOCAL); } static void mc_mask_intx_irq(struct irq_data *data) { struct mc_pcie *port = irq_data_get_irq_chip_data(data); - void __iomem *bridge_base_addr = - port->axi_base_addr + MC_PCIE_BRIDGE_ADDR; unsigned long flags; u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT); u32 val; raw_spin_lock_irqsave(&port->lock, flags); - val = readl_relaxed(bridge_base_addr + IMASK_LOCAL); + val = readl_relaxed(port->bridge_base_addr + IMASK_LOCAL); val &= ~mask; - writel_relaxed(val, bridge_base_addr + IMASK_LOCAL); + writel_relaxed(val, port->bridge_base_addr + IMASK_LOCAL); raw_spin_unlock_irqrestore(&port->lock, flags); } static void mc_unmask_intx_irq(struct irq_data *data) { struct mc_pcie *port = irq_data_get_irq_chip_data(data); - void __iomem *bridge_base_addr = - port->axi_base_addr + MC_PCIE_BRIDGE_ADDR; unsigned long flags; u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT); u32 val; raw_spin_lock_irqsave(&port->lock, flags); - val = readl_relaxed(bridge_base_addr + IMASK_LOCAL); + val = readl_relaxed(port->bridge_base_addr + IMASK_LOCAL); val |= mask; - writel_relaxed(val, bridge_base_addr + IMASK_LOCAL); + writel_relaxed(val, port->bridge_base_addr + IMASK_LOCAL); raw_spin_unlock_irqrestore(&port->lock, flags); } @@ -656,8 +638,7 @@ static inline u32 reg_to_event(u32 reg, struct event_map field) static u32 pcie_events(struct mc_pcie *port) { - void __iomem *ctrl_base_addr = port->axi_base_addr + MC_PCIE_CTRL_ADDR; - u32 reg = readl_relaxed(ctrl_base_addr + PCIE_EVENT_INT); + u32 reg = readl_relaxed(port->ctrl_base_addr + PCIE_EVENT_INT); u32 val = 0; int i; @@ -669,8 +650,7 @@ static u32 pcie_events(struct mc_pcie *port) static u32 sec_errors(struct mc_pcie *port) { - void __iomem *ctrl_base_addr = port->axi_base_addr + MC_PCIE_CTRL_ADDR; - u32 reg = readl_relaxed(ctrl_base_addr + SEC_ERROR_INT); + u32 reg = readl_relaxed(port->ctrl_base_addr + SEC_ERROR_INT); u32 val = 0; int i; @@ -682,8 +662,7 @@ static u32 sec_errors(struct mc_pcie *port) static u32 ded_errors(struct mc_pcie *port) { - void __iomem *ctrl_base_addr = port->axi_base_addr + MC_PCIE_CTRL_ADDR; - u32 reg = readl_relaxed(ctrl_base_addr + DED_ERROR_INT); + u32 reg = readl_relaxed(port->ctrl_base_addr + DED_ERROR_INT); u32 val = 0; int i; @@ -695,8 +674,7 @@ static u32 ded_errors(struct mc_pcie *port) static u32 local_events(struct mc_pcie *port) { - void __iomem *bridge_base_addr = port->axi_base_addr + MC_PCIE_BRIDGE_ADDR; - u32 reg = readl_relaxed(bridge_base_addr + ISTATUS_LOCAL); + u32 reg = readl_relaxed(port->bridge_base_addr + ISTATUS_LOCAL); u32 val = 0; int i; @@ -758,8 +736,12 @@ static void mc_ack_event_irq(struct irq_data *data) void __iomem *addr; u32 mask; - addr = port->axi_base_addr + event_descs[event].base + - event_descs[event].offset; + if (event_descs[event].offset == ISTATUS_LOCAL) + addr = port->bridge_base_addr; + else + addr = port->ctrl_base_addr; + + addr += event_descs[event].offset; mask = event_descs[event].mask; mask |= event_descs[event].enb_mask; @@ -774,8 +756,12 @@ static void mc_mask_event_irq(struct irq_data *data) u32 mask; u32 val; - addr = port->axi_base_addr + event_descs[event].base + - event_descs[event].mask_offset; + if (event_descs[event].offset == ISTATUS_LOCAL) + addr = port->bridge_base_addr; + else + addr = port->ctrl_base_addr; + + addr += event_descs[event].mask_offset; mask = event_descs[event].mask; if (event_descs[event].enb_mask) { mask <<= PCIE_EVENT_INT_ENB_SHIFT; @@ -804,8 +790,12 @@ static void mc_unmask_event_irq(struct irq_data *data) u32 mask; u32 val; - addr = port->axi_base_addr + event_descs[event].base + - event_descs[event].mask_offset; + if (event_descs[event].offset == ISTATUS_LOCAL) + addr = port->bridge_base_addr; + else + addr = port->ctrl_base_addr; + + addr += event_descs[event].mask_offset; mask = event_descs[event].mask; if (event_descs[event].enb_mask) @@ -972,8 +962,6 @@ static void mc_pcie_setup_window(void __iomem *bridge_base_addr, u32 index, static int mc_pcie_setup_windows(struct platform_device *pdev, struct mc_pcie *port) { - void __iomem *bridge_base_addr = - port->axi_base_addr + MC_PCIE_BRIDGE_ADDR; struct pci_host_bridge *bridge = platform_get_drvdata(pdev); struct resource_entry *entry; u64 pci_addr; @@ -982,7 +970,7 @@ static int mc_pcie_setup_windows(struct platform_device *pdev, resource_list_for_each_entry(entry, &bridge->windows) { if (resource_type(entry->res) == IORESOURCE_MEM) { pci_addr = entry->res->start - entry->offset; - mc_pcie_setup_window(bridge_base_addr, index, + mc_pcie_setup_window(port->bridge_base_addr, index, entry->res->start, pci_addr, resource_size(entry->res)); index++; @@ -994,26 +982,20 @@ static int mc_pcie_setup_windows(struct platform_device *pdev, static inline void mc_clear_secs(struct mc_pcie *port) { - void __iomem *ctrl_base_addr = port->axi_base_addr + MC_PCIE_CTRL_ADDR; - - writel_relaxed(SEC_ERROR_INT_ALL_RAM_SEC_ERR_INT, ctrl_base_addr + + writel_relaxed(SEC_ERROR_INT_ALL_RAM_SEC_ERR_INT, port->ctrl_base_addr + SEC_ERROR_INT); - writel_relaxed(0, ctrl_base_addr + SEC_ERROR_EVENT_CNT); + writel_relaxed(0, port->ctrl_base_addr + SEC_ERROR_EVENT_CNT); } static inline void mc_clear_deds(struct mc_pcie *port) { - void __iomem *ctrl_base_addr = port->axi_base_addr + MC_PCIE_CTRL_ADDR; - - writel_relaxed(DED_ERROR_INT_ALL_RAM_DED_ERR_INT, ctrl_base_addr + + writel_relaxed(DED_ERROR_INT_ALL_RAM_DED_ERR_INT, port->ctrl_base_addr + DED_ERROR_INT); - writel_relaxed(0, ctrl_base_addr + DED_ERROR_EVENT_CNT); + writel_relaxed(0, port->ctrl_base_addr + DED_ERROR_EVENT_CNT); } static void mc_disable_interrupts(struct mc_pcie *port) { - void __iomem *bridge_base_addr = port->axi_base_addr + MC_PCIE_BRIDGE_ADDR; - void __iomem *ctrl_base_addr = port->axi_base_addr + MC_PCIE_CTRL_ADDR; u32 val; /* Ensure ECC bypass is enabled */ @@ -1021,22 +1003,22 @@ static void mc_disable_interrupts(struct mc_pcie *port) ECC_CONTROL_RX_RAM_ECC_BYPASS | ECC_CONTROL_PCIE2AXI_RAM_ECC_BYPASS | ECC_CONTROL_AXI2PCIE_RAM_ECC_BYPASS; - writel_relaxed(val, ctrl_base_addr + ECC_CONTROL); + writel_relaxed(val, port->ctrl_base_addr + ECC_CONTROL); /* Disable SEC errors and clear any outstanding */ - writel_relaxed(SEC_ERROR_INT_ALL_RAM_SEC_ERR_INT, ctrl_base_addr + + writel_relaxed(SEC_ERROR_INT_ALL_RAM_SEC_ERR_INT, port->ctrl_base_addr + SEC_ERROR_INT_MASK); mc_clear_secs(port); /* Disable DED errors and clear any outstanding */ - writel_relaxed(DED_ERROR_INT_ALL_RAM_DED_ERR_INT, ctrl_base_addr + + writel_relaxed(DED_ERROR_INT_ALL_RAM_DED_ERR_INT, port->ctrl_base_addr + DED_ERROR_INT_MASK); mc_clear_deds(port); /* Disable local interrupts and clear any outstanding */ - writel_relaxed(0, bridge_base_addr + IMASK_LOCAL); - writel_relaxed(GENMASK(31, 0), bridge_base_addr + ISTATUS_LOCAL); - writel_relaxed(GENMASK(31, 0), bridge_base_addr + ISTATUS_MSI); + writel_relaxed(0, port->bridge_base_addr + IMASK_LOCAL); + writel_relaxed(GENMASK(31, 0), port->bridge_base_addr + ISTATUS_LOCAL); + writel_relaxed(GENMASK(31, 0), port->bridge_base_addr + ISTATUS_MSI); /* Disable PCIe events and clear any outstanding */ val = PCIE_EVENT_INT_L2_EXIT_INT | @@ -1045,11 +1027,11 @@ static void mc_disable_interrupts(struct mc_pcie *port) PCIE_EVENT_INT_L2_EXIT_INT_MASK | PCIE_EVENT_INT_HOTRST_EXIT_INT_MASK | PCIE_EVENT_INT_DLUP_EXIT_INT_MASK; - writel_relaxed(val, ctrl_base_addr + PCIE_EVENT_INT); + writel_relaxed(val, port->ctrl_base_addr + PCIE_EVENT_INT); /* Disable host interrupts and clear any outstanding */ - writel_relaxed(0, bridge_base_addr + IMASK_HOST); - writel_relaxed(GENMASK(31, 0), bridge_base_addr + ISTATUS_HOST); + writel_relaxed(0, port->bridge_base_addr + IMASK_HOST); + writel_relaxed(GENMASK(31, 0), port->bridge_base_addr + ISTATUS_HOST); } static int mc_init_interrupts(struct platform_device *pdev, struct mc_pcie *port) @@ -1112,14 +1094,11 @@ static int mc_platform_init(struct pci_config_window *cfg) { struct device *dev = cfg->parent; struct platform_device *pdev = to_platform_device(dev); - void __iomem *bridge_base_addr = - port->axi_base_addr + MC_PCIE_BRIDGE_ADDR; int ret; /* Configure address translation table 0 for PCIe config space */ - mc_pcie_setup_window(bridge_base_addr, 0, cfg->res.start, - cfg->res.start, - resource_size(&cfg->res)); + mc_pcie_setup_window(port->bridge_base_addr, 0, cfg->res.start, + cfg->res.start, resource_size(&cfg->res)); /* Need some fixups in config space */ mc_pcie_enable_msi(port, cfg->win); @@ -1140,7 +1119,7 @@ static int mc_platform_init(struct pci_config_window *cfg) static int mc_host_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; - void __iomem *bridge_base_addr; + void __iomem *axi_base_addr; int ret; u32 val; @@ -1150,28 +1129,40 @@ static int mc_host_probe(struct platform_device *pdev) port->dev = dev; - port->axi_base_addr = devm_platform_ioremap_resource(pdev, 1); - if (IS_ERR(port->axi_base_addr)) - return PTR_ERR(port->axi_base_addr); + port->bridge_base_addr = devm_platform_ioremap_resource_byname(pdev, "bridge"); + port->ctrl_base_addr = devm_platform_ioremap_resource_byname(pdev, "ctrl"); + if(!IS_ERR(port->bridge_base_addr) && !IS_ERR(port->ctrl_base_addr)) + goto addrs_set; + /* + * The original, incorrect, binding that lumped the control and + * bridge addresses together still needs to be handled by the driver. + */ + axi_base_addr = devm_platform_ioremap_resource_byname(pdev, "apb"); + if (IS_ERR(axi_base_addr)) + return dev_err_probe(dev, PTR_ERR(port->bridge_base_addr), + "both legacy apb register and ctrl/bridge regions missing"); + + port->bridge_base_addr = axi_base_addr + MC_PCIE1_BRIDGE_ADDR; + port->ctrl_base_addr = axi_base_addr + MC_PCIE1_CTRL_ADDR; + +addrs_set: mc_disable_interrupts(port); - bridge_base_addr = port->axi_base_addr + MC_PCIE_BRIDGE_ADDR; - /* Allow enabling MSI by disabling MSI-X */ - val = readl(bridge_base_addr + PCIE_PCI_IRQ_DW0); + val = readl(port->bridge_base_addr + PCIE_PCI_IRQ_DW0); val &= ~MSIX_CAP_MASK; - writel(val, bridge_base_addr + PCIE_PCI_IRQ_DW0); + writel(val, port->bridge_base_addr + PCIE_PCI_IRQ_DW0); /* Pick num vectors from bitfile programmed onto FPGA fabric */ - val = readl(bridge_base_addr + PCIE_PCI_IRQ_DW0); + val = readl(port->bridge_base_addr + PCIE_PCI_IRQ_DW0); val &= NUM_MSI_MSGS_MASK; val >>= NUM_MSI_MSGS_SHIFT; port->msi.num_vectors = 1 << val; /* Pick vector address from design */ - port->msi.vector_phy = readl_relaxed(bridge_base_addr + IMSI_ADDR); + port->msi.vector_phy = readl_relaxed(port->bridge_base_addr + IMSI_ADDR); ret = mc_pcie_init_clks(dev); if (ret) {