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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D3340C433EF for ; Sun, 20 Feb 2022 19:33:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243537AbiBTTeT (ORCPT ); Sun, 20 Feb 2022 14:34:19 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:43082 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234790AbiBTTeS (ORCPT ); Sun, 20 Feb 2022 14:34:18 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 59D364506A for ; Sun, 20 Feb 2022 11:33:56 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 06C7FB80DC3 for ; Sun, 20 Feb 2022 19:33:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9D445C340F4; Sun, 20 Feb 2022 19:33:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1645385633; bh=LGRhuYWvVJwUe2qfZMQMggxOjvw1RqnT4tWrX+0FD70=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Iy1AVXXUDzrGyXqJ6hAVU8v7U07M85kuVqWwBssvVeoCgWinJPSt0v/tP1vRYGORV GIPAjBx6iXf4FKlzm8uM7dwov5D1BSA/CZJzqZRMHSThBRGm89lQbPsO7yPlMrXL1q qhp5Zu6Uht2rR++tUnLiFLPey88N1hbj9YSHAY2Z/wBoVLmDB47WfK9zgkOMz/0Gya BLFjMnYLeUHt/VTVHW66OLPVvHfPQ1ixwO/3sH9a4EfC6SaOePHwcltPPHZpRDG6gi Ut90snnf2cMGfeRNHwhL4qS+AVhGAqeC6llneLjVrp/dZ7YisLCR282NmC+ogSXNCD lsl5SRU8tjGJQ== From: =?UTF-8?q?Marek=20Beh=C3=BAn?= To: Lorenzo Pieralisi , Bjorn Helgaas Cc: =?UTF-8?q?Krzysztof=20Wilczy=C5=84ski?= , Marc Zyngier , pali@kernel.org, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Gregory CLEMENT , Russell King , =?UTF-8?q?Marek=20Beh=C3=BAn?= Subject: [PATCH 01/18] PCI: pci-bridge-emul: Re-arrange register tests Date: Sun, 20 Feb 2022 20:33:29 +0100 Message-Id: <20220220193346.23789-2-kabel@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220220193346.23789-1-kabel@kernel.org> References: <20220220193346.23789-1-kabel@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Russell King Re-arrange the tests for which sets of registers are being accessed so that it is easier to add further regions later. No functional change. Signed-off-by: Russell King [pali: Fix reading old value in pci_bridge_emul_conf_write] Signed-off-by: Pali Rohár Signed-off-by: Marek Behún --- drivers/pci/pci-bridge-emul.c | 61 ++++++++++++++++++----------------- 1 file changed, 31 insertions(+), 30 deletions(-) diff --git a/drivers/pci/pci-bridge-emul.c b/drivers/pci/pci-bridge-emul.c index a16f9e30099e..a956408834d6 100644 --- a/drivers/pci/pci-bridge-emul.c +++ b/drivers/pci/pci-bridge-emul.c @@ -422,25 +422,25 @@ int pci_bridge_emul_conf_read(struct pci_bridge_emul *bridge, int where, __le32 *cfgspace; const struct pci_bridge_reg_behavior *behavior; - if (bridge->has_pcie && reg >= PCI_CAP_PCIE_END) { - *value = 0; - return PCIBIOS_SUCCESSFUL; - } - - if (!bridge->has_pcie && reg >= PCI_BRIDGE_CONF_END) { + if (reg < PCI_BRIDGE_CONF_END) { + /* Emulated PCI space */ + read_op = bridge->ops->read_base; + cfgspace = (__le32 *) &bridge->conf; + behavior = bridge->pci_regs_behavior; + } else if (!bridge->has_pcie) { + /* PCIe space is not implemented, and no PCI capabilities */ *value = 0; return PCIBIOS_SUCCESSFUL; - } - - if (bridge->has_pcie && reg >= PCI_CAP_PCIE_START) { + } else if (reg < PCI_CAP_PCIE_END) { + /* Our emulated PCIe capability */ reg -= PCI_CAP_PCIE_START; read_op = bridge->ops->read_pcie; cfgspace = (__le32 *) &bridge->pcie_conf; behavior = bridge->pcie_cap_regs_behavior; } else { - read_op = bridge->ops->read_base; - cfgspace = (__le32 *) &bridge->conf; - behavior = bridge->pci_regs_behavior; + /* Beyond our PCIe space */ + *value = 0; + return PCIBIOS_SUCCESSFUL; } if (read_op) @@ -484,11 +484,27 @@ int pci_bridge_emul_conf_write(struct pci_bridge_emul *bridge, int where, __le32 *cfgspace; const struct pci_bridge_reg_behavior *behavior; - if (bridge->has_pcie && reg >= PCI_CAP_PCIE_END) - return PCIBIOS_SUCCESSFUL; + ret = pci_bridge_emul_conf_read(bridge, reg, 4, &old); + if (ret != PCIBIOS_SUCCESSFUL) + return ret; - if (!bridge->has_pcie && reg >= PCI_BRIDGE_CONF_END) + if (reg < PCI_BRIDGE_CONF_END) { + /* Emulated PCI space */ + write_op = bridge->ops->write_base; + cfgspace = (__le32 *) &bridge->conf; + behavior = bridge->pci_regs_behavior; + } else if (!bridge->has_pcie) { + /* PCIe space is not implemented, and no PCI capabilities */ return PCIBIOS_SUCCESSFUL; + } else if (reg < PCI_CAP_PCIE_END) { + /* Our emulated PCIe capability */ + reg -= PCI_CAP_PCIE_START; + write_op = bridge->ops->write_pcie; + cfgspace = (__le32 *) &bridge->pcie_conf; + behavior = bridge->pcie_cap_regs_behavior; + } else { + return PCIBIOS_SUCCESSFUL; + } shift = (where & 0x3) * 8; @@ -501,21 +517,6 @@ int pci_bridge_emul_conf_write(struct pci_bridge_emul *bridge, int where, else return PCIBIOS_BAD_REGISTER_NUMBER; - ret = pci_bridge_emul_conf_read(bridge, reg, 4, &old); - if (ret != PCIBIOS_SUCCESSFUL) - return ret; - - if (bridge->has_pcie && reg >= PCI_CAP_PCIE_START) { - reg -= PCI_CAP_PCIE_START; - write_op = bridge->ops->write_pcie; - cfgspace = (__le32 *) &bridge->pcie_conf; - behavior = bridge->pcie_cap_regs_behavior; - } else { - write_op = bridge->ops->write_base; - cfgspace = (__le32 *) &bridge->conf; - behavior = bridge->pci_regs_behavior; - } - /* Keep all bits, except the RW bits */ new = old & (~mask | ~behavior[reg / 4].rw); -- 2.34.1 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 requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B2522C433EF for ; Sun, 20 Feb 2022 19:35:27 +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: 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From: =?UTF-8?q?Marek=20Beh=C3=BAn?= To: Lorenzo Pieralisi , Bjorn Helgaas Cc: =?UTF-8?q?Krzysztof=20Wilczy=C5=84ski?= , Marc Zyngier , pali@kernel.org, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Gregory CLEMENT , Russell King , =?UTF-8?q?Marek=20Beh=C3=BAn?= Subject: [PATCH 01/18] PCI: pci-bridge-emul: Re-arrange register tests Date: Sun, 20 Feb 2022 20:33:29 +0100 Message-Id: <20220220193346.23789-2-kabel@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220220193346.23789-1-kabel@kernel.org> References: <20220220193346.23789-1-kabel@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220220_113356_644257_CFB083B1 X-CRM114-Status: GOOD ( 14.85 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" 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