From patchwork Fri May 5 14:11:53 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joao Pinto X-Patchwork-Id: 9713641 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id E54A36034B for ; Fri, 5 May 2017 14:12:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EB2AF286BB for ; Fri, 5 May 2017 14:12:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DFFE0286BD; Fri, 5 May 2017 14:12:01 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7775A286BB for ; Fri, 5 May 2017 14:12:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751859AbdEEOL7 (ORCPT ); Fri, 5 May 2017 10:11:59 -0400 Received: from smtprelay.synopsys.com ([198.182.47.9]:48891 "EHLO smtprelay.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751437AbdEEOL6 (ORCPT ); Fri, 5 May 2017 10:11:58 -0400 Received: from mailhost.synopsys.com (mailhost1.synopsys.com [10.12.238.239]) by smtprelay.synopsys.com (Postfix) with ESMTP id C15BD24E0B26; Fri, 5 May 2017 07:11:57 -0700 (PDT) Received: from mailhost.synopsys.com (localhost [127.0.0.1]) by mailhost.synopsys.com (Postfix) with ESMTP id A4B5C41C; Fri, 5 May 2017 07:11:57 -0700 (PDT) Received: from jpinto-box.internal.synopsys.com (jpinto-box.internal.synopsys.com [10.107.19.150]) by mailhost.synopsys.com (Postfix) with ESMTP id 1B71740A; Fri, 5 May 2017 07:11:55 -0700 (PDT) From: Joao Pinto To: kishon@ti.com, bhelgaas@google.com, jingoohan1@gmail.com, marc.zyngier@arm.com Cc: linux-pci@vger.kernel.org, Joao Pinto Subject: [RFC] pci: using new interrupt API to enable MSI and MSI-X Date: Fri, 5 May 2017 15:11:53 +0100 Message-Id: <806903036508ae5246084cbc3b796083d76f8917.1493992929.git.jpinto@synopsys.com> X-Mailer: git-send-email 2.9.3 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Hello, I am currently adding the support for both MSI and MSI-x in pcie-designware and I am now facing a dificulty. My test endpoint is a USB 3.1 MSI / MSI-X capable and I tested that with the changes introduced by this patch we are able to enable MSI and MSI-X in this endpoint (depends on the usage of the MSI_FLAG_PCI_MSIX flag). The problem I am facing now is that Intc for the USB 3.1 Endpoint is completely bogus (524288) when it should be 1, and so I am not receiving any interrupts from the endpoint. I would apreciate that more experienced people in this interrupt subject could give me an hint. I send you the "lspci -v" results and /proc/interrupts. Thank you so much for your help. # cat /proc/interrupts CPU0 3: 755 ARC In-core Intc 3 Timer0 (per-cpu-tick) 4: 0 dw-apb-ictl 4 eth0 8: 1 dw-apb-ictl 8 ehci_hcd:usb1, ohci_hcd:usb2 9: 37 dw-apb-ictl 7 dw-mci 14: 0 dw-apb-ictl 14 e001d000.i2c 16: 0 dw-apb-ictl 16 e001f000.i2c 19: 145 dw-apb-ictl 19 serial 45: 0 PCI-MSI 0 aerdrv 46: 0 PCI-MSI 524288 xhci_hcd # lspci -v 00:00.0 PCI bridge: Synopsys, Inc. Device eddc (rev 01) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0, IRQ 45 Bus: primary=00, secondary=01, subordinate=01, sec-latency=0 Memory behind bridge: d0400000-d04fffff [virtual] Expansion ROM at d0500000 [disabled] [size=64K] Capabilities: [40] Power Management version 3 Capabilities: [50] MSI: Enable+ Count=1/1 Maskable- 64bit+ Capabilities: [70] Express Root Port (Slot-), MSI 00 Capabilities: [100] Advanced Error Reporting Capabilities: [148] #19 Capabilities: [158] Vendor Specific Information: ID=0002 Rev=4 Len=100 Kernel driver in use: pcieport 01:00.0 USB controller: ASMedia Technology Inc. ASM1142 USB 3.1 Host Controller (prog-if 30 [XHCI]) Subsystem: ASMedia Technology Inc. ASM1142 USB 3.1 Host Controller Flags: bus master, fast devsel, latency 0, IRQ 46 Memory at d0400000 (64-bit, non-prefetchable) [size=32K] Capabilities: [50] MSI: Enable+ Count=1/8 Maskable- 64bit+ Capabilities: [68] MSI-X: Enable- Count=8 Masked- Capabilities: [78] Power Management version 3 Capabilities: [80] Express Endpoint, MSI 00 Capabilities: [100] Virtual Channel Capabilities: [200] Advanced Error Reporting Capabilities: [280] #19 Capabilities: [300] Latency Tolerance Reporting Kernel driver in use: xhci_hcd Signed-off-by: Joao Pinto --- .../devicetree/bindings/pci/designware-pcie.txt | 2 + drivers/pci/dwc/pcie-designware-host.c | 292 ++++++++------------- drivers/pci/dwc/pcie-designware-plat.c | 35 +-- drivers/pci/dwc/pcie-designware.h | 7 +- 4 files changed, 143 insertions(+), 193 deletions(-) diff --git a/Documentation/devicetree/bindings/pci/designware-pcie.txt b/Documentation/devicetree/bindings/pci/designware-pcie.txt index b2480dd..41803ea 100644 --- a/Documentation/devicetree/bindings/pci/designware-pcie.txt +++ b/Documentation/devicetree/bindings/pci/designware-pcie.txt @@ -34,6 +34,8 @@ Optional properties: RC mode: - num-viewport: number of view ports configured in hardware. If a platform does not specify it, the driver assumes 2. +- num-vectors: number of available interrupt vectors. If a platform does not + specify it, the driver assumes 1. - bus-range: PCI bus numbers covered (it is recommended for new devicetrees to specify this property, to keep backwards compatibility a range of 0x00-0xff is assumed if not present) diff --git a/drivers/pci/dwc/pcie-designware-host.c b/drivers/pci/dwc/pcie-designware-host.c index 28ed32b..96a5fb3 100644 --- a/drivers/pci/dwc/pcie-designware-host.c +++ b/drivers/pci/dwc/pcie-designware-host.c @@ -11,6 +11,9 @@ * published by the Free Software Foundation. */ +#include +#include +#include #include #include #include @@ -53,32 +56,43 @@ static struct irq_chip dw_msi_irq_chip = { .irq_unmask = pci_msi_unmask_irq, }; +static struct msi_domain_info dw_pcie_msi_domain_info = { + .flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS | + MSI_FLAG_PCI_MSIX), + .chip = &dw_msi_irq_chip, +}; + /* MSI int handler */ -irqreturn_t dw_handle_msi_irq(struct pcie_port *pp) +void dw_handle_msi_irq(struct irq_desc *desc) { - u32 val; - int i, pos, irq; - irqreturn_t ret = IRQ_NONE; + struct irq_chip *chip = irq_desc_get_chip(desc); + struct pcie_port *pp; + struct dw_pcie *pci; + int i, pos, virq; + u32 status; + + chained_irq_enter(chip, desc); + pci = irq_desc_get_handler_data(desc); + pp = &pci->pp; for (i = 0; i < MAX_MSI_CTRLS; i++) { dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_STATUS + i * 12, 4, - &val); - if (!val) + &status); + if (!status) continue; - ret = IRQ_HANDLED; pos = 0; - while ((pos = find_next_bit((unsigned long *) &val, 32, + while ((pos = find_next_bit((unsigned long *) &status, 32, pos)) != 32) { - irq = irq_find_mapping(pp->irq_domain, i * 32 + pos); + virq = irq_find_mapping(pp->irq_domain, i * 32 + pos); dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_STATUS + i * 12, 4, 1 << pos); - generic_handle_irq(irq); + generic_handle_irq(virq); pos++; } } - return ret; + chained_irq_exit(chip, desc); } void dw_pcie_msi_init(struct pcie_port *pp) @@ -95,93 +110,10 @@ void dw_pcie_msi_init(struct pcie_port *pp) (u32)(msi_target >> 32 & 0xffffffff)); } -static void dw_pcie_msi_clear_irq(struct pcie_port *pp, int irq) -{ - unsigned int res, bit, val; - - res = (irq / 32) * 12; - bit = irq % 32; - dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, &val); - val &= ~(1 << bit); - dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, val); -} - -static void clear_irq_range(struct pcie_port *pp, unsigned int irq_base, - unsigned int nvec, unsigned int pos) -{ - unsigned int i; - - for (i = 0; i < nvec; i++) { - irq_set_msi_desc_off(irq_base, i, NULL); - /* Disable corresponding interrupt on MSI controller */ - if (pp->ops->msi_clear_irq) - pp->ops->msi_clear_irq(pp, pos + i); - else - dw_pcie_msi_clear_irq(pp, pos + i); - } - - bitmap_release_region(pp->msi_irq_in_use, pos, order_base_2(nvec)); -} - -static void dw_pcie_msi_set_irq(struct pcie_port *pp, int irq) -{ - unsigned int res, bit, val; - - res = (irq / 32) * 12; - bit = irq % 32; - dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, &val); - val |= 1 << bit; - dw_pcie_wr_own_conf(pp, PCIE_MSI_INTR0_ENABLE + res, 4, val); -} - -static int assign_irq(int no_irqs, struct msi_desc *desc, int *pos) -{ - int irq, pos0, i; - struct pcie_port *pp; - - pp = (struct pcie_port *)msi_desc_to_pci_sysdata(desc); - pos0 = bitmap_find_free_region(pp->msi_irq_in_use, MAX_MSI_IRQS, - order_base_2(no_irqs)); - if (pos0 < 0) - goto no_valid_irq; - - irq = irq_find_mapping(pp->irq_domain, pos0); - if (!irq) - goto no_valid_irq; - - /* - * irq_create_mapping (called from dw_pcie_host_init) pre-allocates - * descs so there is no need to allocate descs here. We can therefore - * assume that if irq_find_mapping above returns non-zero, then the - * descs are also successfully allocated. - */ - - for (i = 0; i < no_irqs; i++) { - if (irq_set_msi_desc_off(irq, i, desc) != 0) { - clear_irq_range(pp, irq, i, pos0); - goto no_valid_irq; - } - /*Enable corresponding interrupt in MSI interrupt controller */ - if (pp->ops->msi_set_irq) - pp->ops->msi_set_irq(pp, pos0 + i); - else - dw_pcie_msi_set_irq(pp, pos0 + i); - } - - *pos = pos0; - desc->nvec_used = no_irqs; - desc->msi_attrib.multiple = order_base_2(no_irqs); - - return irq; - -no_valid_irq: - *pos = pos0; - return -ENOSPC; -} - -static void dw_msi_setup_msg(struct pcie_port *pp, unsigned int irq, u32 pos) +static void dw_pci_compose_msi_msg(struct irq_data *data, struct msi_msg *msg) { - struct msi_msg msg; + struct dw_pcie *pci = irq_data_get_irq_chip_data(data); + struct pcie_port *pp = &pci->pp; u64 msi_target; if (pp->ops->get_msi_addr) @@ -189,89 +121,105 @@ static void dw_msi_setup_msg(struct pcie_port *pp, unsigned int irq, u32 pos) else msi_target = virt_to_phys((void *)pp->msi_data); - msg.address_lo = (u32)(msi_target & 0xffffffff); - msg.address_hi = (u32)(msi_target >> 32 & 0xffffffff); + msg->address_lo = (u32)(msi_target & 0xffffffff); + msg->address_hi = (u32)(msi_target >> 32 & 0xffffffff); if (pp->ops->get_msi_data) - msg.data = pp->ops->get_msi_data(pp, pos); + msg->data = pp->ops->get_msi_data(pp, data->hwirq); else - msg.data = pos; + msg->data = data->hwirq; - pci_write_msi_msg(irq, &msg); + dev_dbg(pci->dev, "msi#%d address_hi %#x address_lo %#x\n", + (int)data->hwirq, msg->address_hi, msg->address_lo); } -static int dw_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev, - struct msi_desc *desc) +static int dw_pci_msi_set_affinity(struct irq_data *irq_data, + const struct cpumask *mask, bool force) { - int irq, pos; - struct pcie_port *pp = pdev->bus->sysdata; - - if (desc->msi_attrib.is_msix) - return -EINVAL; - - irq = assign_irq(1, desc, &pos); - if (irq < 0) - return irq; - - dw_msi_setup_msg(pp, irq, pos); - - return 0; + return -EINVAL; } -static int dw_msi_setup_irqs(struct msi_controller *chip, struct pci_dev *pdev, - int nvec, int type) +static struct irq_chip dw_pci_msi_bottom_irq_chip = { + .name = "DW MSI", + .irq_compose_msi_msg = dw_pci_compose_msi_msg, + .irq_set_affinity = dw_pci_msi_set_affinity, +}; + +static int dw_pcie_irq_domain_alloc(struct irq_domain *domain, + unsigned int virq, unsigned int nr_irqs, + void *args) { -#ifdef CONFIG_PCI_MSI - int irq, pos; - struct msi_desc *desc; - struct pcie_port *pp = pdev->bus->sysdata; + struct dw_pcie *pci = domain->host_data; + struct pcie_port *pp = &pci->pp; + unsigned long bit; - /* MSI-X interrupts are not supported */ - if (type == PCI_CAP_ID_MSIX) - return -EINVAL; + WARN_ON(nr_irqs != 1); - WARN_ON(!list_is_singular(&pdev->dev.msi_list)); - desc = list_entry(pdev->dev.msi_list.next, struct msi_desc, list); + bit = find_first_zero_bit(pp->msi_irq_in_use, pp->num_vectors); + if (bit >= pp->num_vectors) { + return -ENOSPC; + } - irq = assign_irq(nvec, desc, &pos); - if (irq < 0) - return irq; + set_bit(bit, pp->msi_irq_in_use); - dw_msi_setup_msg(pp, irq, pos); + irq_domain_set_info(domain, virq, bit, &dw_pci_msi_bottom_irq_chip, + domain->host_data, handle_simple_irq, + NULL, NULL); return 0; -#else - return -EINVAL; -#endif } -static void dw_msi_teardown_irq(struct msi_controller *chip, unsigned int irq) +static void dw_pcie_irq_domain_free(struct irq_domain *domain, + unsigned int virq, unsigned int nr_irqs) { - struct irq_data *data = irq_get_irq_data(irq); - struct msi_desc *msi = irq_data_get_msi_desc(data); - struct pcie_port *pp = (struct pcie_port *)msi_desc_to_pci_sysdata(msi); + struct irq_data *data = irq_domain_get_irq_data(domain, virq); + struct dw_pcie *pci = irq_data_get_irq_chip_data(data); + struct pcie_port *pp = &pci->pp; - clear_irq_range(pp, irq, 1, data->hwirq); + if (!test_bit(data->hwirq, pp->msi_irq_in_use)) + dev_err(pci->dev, "trying to free unused MSI#%lu\n", + data->hwirq); + else + __clear_bit(data->hwirq, pp->msi_irq_in_use); } -static struct msi_controller dw_pcie_msi_chip = { - .setup_irq = dw_msi_setup_irq, - .setup_irqs = dw_msi_setup_irqs, - .teardown_irq = dw_msi_teardown_irq, +static const struct irq_domain_ops dw_pcie_msi_domain_ops = { + .alloc = dw_pcie_irq_domain_alloc, + .free = dw_pcie_irq_domain_free, }; -static int dw_pcie_msi_map(struct irq_domain *domain, unsigned int irq, - irq_hw_number_t hwirq) +static int dw_pcie_allocate_domains(struct dw_pcie *pci) { - irq_set_chip_and_handler(irq, &dw_msi_irq_chip, handle_simple_irq); - irq_set_chip_data(irq, domain->host_data); + struct pcie_port *pp = &pci->pp; + struct fwnode_handle *fwnode = of_node_to_fwnode(pci->dev->of_node); + + pp->irq_domain = irq_domain_add_linear(NULL, pp->num_vectors, + &dw_pcie_msi_domain_ops, pci); + if (!pp->irq_domain) { + dev_err(pci->dev, "failed to create IRQ domain\n"); + return -ENOMEM; + } + + pp->msi_domain = pci_msi_create_irq_domain(fwnode, + &dw_pcie_msi_domain_info, + pp->irq_domain); + if (!pp->msi_domain) { + dev_err(pci->dev, "failed to create MSI domain\n"); + irq_domain_remove(pp->irq_domain); + return -ENOMEM; + } return 0; } -static const struct irq_domain_ops msi_domain_ops = { - .map = dw_pcie_msi_map, -}; +void dw_pcie_free_msi(struct pcie_port *pp) +{ + irq_set_chained_handler(pp->msi_irq, NULL); + irq_set_handler_data(pp->msi_irq, NULL); + + irq_domain_remove(pp->msi_domain); + irq_domain_remove(pp->irq_domain); +} int dw_pcie_host_init(struct pcie_port *pp) { @@ -281,7 +229,7 @@ int dw_pcie_host_init(struct pcie_port *pp) struct platform_device *pdev = to_platform_device(dev); struct pci_bus *bus, *child; struct resource *cfg_res; - int i, ret; + int ret; LIST_HEAD(res); struct resource_entry *win, *tmp; @@ -377,37 +325,29 @@ int dw_pcie_host_init(struct pcie_port *pp) pci->num_viewport = 2; if (IS_ENABLED(CONFIG_PCI_MSI)) { - if (!pp->ops->msi_host_init) { - pp->irq_domain = irq_domain_add_linear(dev->of_node, - MAX_MSI_IRQS, &msi_domain_ops, - &dw_pcie_msi_chip); - if (!pp->irq_domain) { - dev_err(dev, "irq domain init failed\n"); - ret = -ENXIO; - goto error; - } - for (i = 0; i < MAX_MSI_IRQS; i++) - irq_create_mapping(pp->irq_domain, i); - } else { - ret = pp->ops->msi_host_init(pp, &dw_pcie_msi_chip); - if (ret < 0) - goto error; - } + ret = of_property_read_u32(np, "num-vectors", + &pp->num_vectors); + if (ret) + pp->num_vectors = 1; + + ret = dw_pcie_allocate_domains(pci); + if (ret) + goto error; + + if (!pp->ops->msi_host_init) + goto error; + else + pp->ops->msi_host_init(pci); } if (pp->ops->host_init) pp->ops->host_init(pp); pp->root_bus_nr = pp->busn->start; - if (IS_ENABLED(CONFIG_PCI_MSI)) { - bus = pci_scan_root_bus_msi(dev, pp->root_bus_nr, - &dw_pcie_ops, pp, &res, - &dw_pcie_msi_chip); - dw_pcie_msi_chip.dev = dev; - } else - bus = pci_scan_root_bus(dev, pp->root_bus_nr, &dw_pcie_ops, - pp, &res); + + bus = pci_scan_root_bus(dev, pp->root_bus_nr, &dw_pcie_ops, + pp, &res); if (!bus) { ret = -ENOMEM; goto error; diff --git a/drivers/pci/dwc/pcie-designware-plat.c b/drivers/pci/dwc/pcie-designware-plat.c index 32091b3..4360fc6 100644 --- a/drivers/pci/dwc/pcie-designware-plat.c +++ b/drivers/pci/dwc/pcie-designware-plat.c @@ -28,13 +28,6 @@ struct dw_plat_pcie { struct dw_pcie *pci; }; -static irqreturn_t dw_plat_pcie_msi_irq_handler(int irq, void *arg) -{ - struct pcie_port *pp = arg; - - return dw_handle_msi_irq(pp); -} - static void dw_plat_pcie_host_init(struct pcie_port *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); @@ -46,8 +39,15 @@ static void dw_plat_pcie_host_init(struct pcie_port *pp) dw_pcie_msi_init(pp); } +static void dw_plat_msi_host_init (struct dw_pcie *pci) +{ + struct pcie_port *pp = &pci->pp; + irq_set_chained_handler_and_data(pp->msi_irq, dw_handle_msi_irq, pci); +} + static struct dw_pcie_host_ops dw_plat_pcie_host_ops = { .host_init = dw_plat_pcie_host_init, + .msi_host_init = dw_plat_msi_host_init, }; static int dw_plat_add_pcie_port(struct pcie_port *pp, @@ -64,14 +64,6 @@ static int dw_plat_add_pcie_port(struct pcie_port *pp, pp->msi_irq = platform_get_irq(pdev, 0); if (pp->msi_irq < 0) return pp->msi_irq; - - ret = devm_request_irq(dev, pp->msi_irq, - dw_plat_pcie_msi_irq_handler, - IRQF_SHARED, "dw-plat-pcie-msi", pp); - if (ret) { - dev_err(dev, "failed to request MSI IRQ\n"); - return ret; - } } pp->root_bus_nr = -1; @@ -86,6 +78,18 @@ static int dw_plat_add_pcie_port(struct pcie_port *pp, return 0; } +static int dw_plat_pcie_remove(struct platform_device *pdev) +{ + struct dw_plat_pcie *dw_plat_pcie = platform_get_drvdata(pdev); + struct dw_pcie *pci = dw_plat_pcie->pci; + + dw_pcie_free_msi(&pci->pp); + + platform_set_drvdata(pdev, NULL); + + return 0; +} + static const struct dw_pcie_ops dw_pcie_ops = { }; @@ -136,5 +140,6 @@ static struct platform_driver dw_plat_pcie_driver = { .suppress_bind_attrs = true, }, .probe = dw_plat_pcie_probe, + .remove = dw_plat_pcie_remove, }; builtin_platform_driver(dw_plat_pcie_driver); diff --git a/drivers/pci/dwc/pcie-designware.h b/drivers/pci/dwc/pcie-designware.h index c6a8405..cd3b3cc7 100644 --- a/drivers/pci/dwc/pcie-designware.h +++ b/drivers/pci/dwc/pcie-designware.h @@ -140,7 +140,7 @@ struct dw_pcie_host_ops { phys_addr_t (*get_msi_addr)(struct pcie_port *pp); u32 (*get_msi_data)(struct pcie_port *pp, int pos); void (*scan_bus)(struct pcie_port *pp); - int (*msi_host_init)(struct pcie_port *pp, struct msi_controller *chip); + void (*msi_host_init)(struct dw_pcie *pci); }; struct pcie_port { @@ -165,7 +165,9 @@ struct pcie_port { struct dw_pcie_host_ops *ops; int msi_irq; struct irq_domain *irq_domain; + struct irq_domain *msi_domain; unsigned long msi_data; + u32 num_vectors; DECLARE_BITMAP(msi_irq_in_use, MAX_MSI_IRQS); }; @@ -280,7 +282,8 @@ static inline u32 dw_pcie_readl_dbi2(struct dw_pcie *pci, u32 reg) } #ifdef CONFIG_PCIE_DW_HOST -irqreturn_t dw_handle_msi_irq(struct pcie_port *pp); +void dw_handle_msi_irq(struct irq_desc *desc); +void dw_pcie_free_msi(struct pcie_port *pp); void dw_pcie_msi_init(struct pcie_port *pp); void dw_pcie_setup_rc(struct pcie_port *pp); int dw_pcie_host_init(struct pcie_port *pp);