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[209.132.180.67]) by mx.google.com with ESMTP id d7si6010028ote.131.2020.03.13.20.45.19; Fri, 13 Mar 2020 20:45:30 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=nxp.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726810AbgCNDou (ORCPT + 99 others); Fri, 13 Mar 2020 23:44:50 -0400 Received: from inva020.nxp.com ([92.121.34.13]:60716 "EHLO inva020.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726738AbgCNDoq (ORCPT ); Fri, 13 Mar 2020 23:44:46 -0400 Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 3A8301A1971; Sat, 14 Mar 2020 04:44:44 +0100 (CET) Received: from invc005.ap-rdc01.nxp.com (invc005.ap-rdc01.nxp.com [165.114.16.14]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 3B2611A18A1; Sat, 14 Mar 2020 04:44:34 +0100 (CET) Received: from titan.ap.freescale.net (titan.ap.freescale.net [10.192.208.233]) by invc005.ap-rdc01.nxp.com (Postfix) with ESMTP id 4CB48402F0; Sat, 14 Mar 2020 11:44:22 +0800 (SGT) From: Xiaowei Bao To: Zhiqiang.Hou@nxp.com, Minghuan.Lian@nxp.com, mingkai.hu@nxp.com, bhelgaas@google.com, robh+dt@kernel.org, shawnguo@kernel.org, leoyang.li@nxp.com, kishon@ti.com, lorenzo.pieralisi@arm.com, roy.zang@nxp.com, amurray@thegoodpenguin.co.uk, jingoohan1@gmail.com, gustavo.pimentel@synopsys.com, andrew.murray@arm.com, linux-pci@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org Cc: Xiaowei Bao Subject: [PATCH v6 04/11] PCI: designware-ep: Modify MSI and MSIX CAP way of finding Date: Sat, 14 Mar 2020 11:30:31 +0800 Message-Id: <20200314033038.24844-5-xiaowei.bao@nxp.com> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20200314033038.24844-1-xiaowei.bao@nxp.com> References: <20200314033038.24844-1-xiaowei.bao@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Each PF of EP device should have it's own MSI or MSIX capabitily struct, so create a dw_pcie_ep_func struct and remove the msi_cap and msix_cap to this struct from dw_pcie_ep, and manage the PFs with a list. Signed-off-by: Xiaowei Bao --- v3: - This is a new patch, to fix the issue of MSI and MSIX CAP way of finding. v4: - Correct some word of commit message. v5: - No change. v6: - Fix up the compile error. drivers/pci/controller/dwc/pcie-designware-ep.c | 135 +++++++++++++++++++++--- drivers/pci/controller/dwc/pcie-designware.h | 18 +++- 2 files changed, 134 insertions(+), 19 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c index 933bb89..fb915f2 100644 --- a/drivers/pci/controller/dwc/pcie-designware-ep.c +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c @@ -19,6 +19,19 @@ void dw_pcie_ep_linkup(struct dw_pcie_ep *ep) pci_epc_linkup(epc); } +struct dw_pcie_ep_func * +dw_pcie_ep_get_func_from_ep(struct dw_pcie_ep *ep, u8 func_no) +{ + struct dw_pcie_ep_func *ep_func; + + list_for_each_entry(ep_func, &ep->func_list, list) { + if (ep_func->func_no == func_no) + return ep_func; + } + + return NULL; +} + static unsigned int dw_pcie_ep_func_select(struct dw_pcie_ep *ep, u8 func_no) { unsigned int func_offset = 0; @@ -59,6 +72,47 @@ void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar) __dw_pcie_ep_reset_bar(pci, func_no, bar, 0); } +static u8 __dw_pcie_ep_find_next_cap(struct dw_pcie_ep *ep, u8 func_no, + u8 cap_ptr, u8 cap) +{ + struct dw_pcie *pci = to_dw_pcie_from_ep(ep); + unsigned int func_offset = 0; + u8 cap_id, next_cap_ptr; + u16 reg; + + if (!cap_ptr) + return 0; + + func_offset = dw_pcie_ep_func_select(ep, func_no); + + reg = dw_pcie_readw_dbi(pci, func_offset + cap_ptr); + cap_id = (reg & 0x00ff); + + if (cap_id > PCI_CAP_ID_MAX) + return 0; + + if (cap_id == cap) + return cap_ptr; + + next_cap_ptr = (reg & 0xff00) >> 8; + return __dw_pcie_ep_find_next_cap(ep, func_no, next_cap_ptr, cap); +} + +static u8 dw_pcie_ep_find_capability(struct dw_pcie_ep *ep, u8 func_no, u8 cap) +{ + struct dw_pcie *pci = to_dw_pcie_from_ep(ep); + unsigned int func_offset = 0; + u8 next_cap_ptr; + u16 reg; + + func_offset = dw_pcie_ep_func_select(ep, func_no); + + reg = dw_pcie_readw_dbi(pci, func_offset + PCI_CAPABILITY_LIST); + next_cap_ptr = (reg & 0x00ff); + + return __dw_pcie_ep_find_next_cap(ep, func_no, next_cap_ptr, cap); +} + static int dw_pcie_ep_write_header(struct pci_epc *epc, u8 func_no, struct pci_epf_header *hdr) { @@ -246,13 +300,18 @@ static int dw_pcie_ep_get_msi(struct pci_epc *epc, u8 func_no) struct dw_pcie *pci = to_dw_pcie_from_ep(ep); u32 val, reg; unsigned int func_offset = 0; + struct dw_pcie_ep_func *ep_func; - if (!ep->msi_cap) + ep_func = dw_pcie_ep_get_func_from_ep(ep, func_no); + if (!ep_func) + return -EINVAL; + + if (!ep_func->msi_cap) return -EINVAL; func_offset = dw_pcie_ep_func_select(ep, func_no); - reg = ep->msi_cap + func_offset + PCI_MSI_FLAGS; + reg = ep_func->msi_cap + func_offset + PCI_MSI_FLAGS; val = dw_pcie_readw_dbi(pci, reg); if (!(val & PCI_MSI_FLAGS_ENABLE)) return -EINVAL; @@ -268,13 +327,18 @@ static int dw_pcie_ep_set_msi(struct pci_epc *epc, u8 func_no, u8 interrupts) struct dw_pcie *pci = to_dw_pcie_from_ep(ep); u32 val, reg; unsigned int func_offset = 0; + struct dw_pcie_ep_func *ep_func; + + ep_func = dw_pcie_ep_get_func_from_ep(ep, func_no); + if (!ep_func) + return -EINVAL; - if (!ep->msi_cap) + if (!ep_func->msi_cap) return -EINVAL; func_offset = dw_pcie_ep_func_select(ep, func_no); - reg = ep->msi_cap + func_offset + PCI_MSI_FLAGS; + reg = ep_func->msi_cap + func_offset + PCI_MSI_FLAGS; val = dw_pcie_readw_dbi(pci, reg); val &= ~PCI_MSI_FLAGS_QMASK; val |= (interrupts << 1) & PCI_MSI_FLAGS_QMASK; @@ -291,13 +355,18 @@ static int dw_pcie_ep_get_msix(struct pci_epc *epc, u8 func_no) struct dw_pcie *pci = to_dw_pcie_from_ep(ep); u32 val, reg; unsigned int func_offset = 0; + struct dw_pcie_ep_func *ep_func; + + ep_func = dw_pcie_ep_get_func_from_ep(ep, func_no); + if (!ep_func) + return -EINVAL; - if (!ep->msix_cap) + if (!ep_func->msix_cap) return -EINVAL; func_offset = dw_pcie_ep_func_select(ep, func_no); - reg = ep->msix_cap + func_offset + PCI_MSIX_FLAGS; + reg = ep_func->msix_cap + func_offset + PCI_MSIX_FLAGS; val = dw_pcie_readw_dbi(pci, reg); if (!(val & PCI_MSIX_FLAGS_ENABLE)) return -EINVAL; @@ -313,13 +382,18 @@ static int dw_pcie_ep_set_msix(struct pci_epc *epc, u8 func_no, u16 interrupts) struct dw_pcie *pci = to_dw_pcie_from_ep(ep); u32 val, reg; unsigned int func_offset = 0; + struct dw_pcie_ep_func *ep_func; - if (!ep->msix_cap) + ep_func = dw_pcie_ep_get_func_from_ep(ep, func_no); + if (!ep_func) + return -EINVAL; + + if (!ep_func->msix_cap) return -EINVAL; func_offset = dw_pcie_ep_func_select(ep, func_no); - reg = ep->msix_cap + func_offset + PCI_MSIX_FLAGS; + reg = ep_func->msix_cap + func_offset + PCI_MSIX_FLAGS; val = dw_pcie_readw_dbi(pci, reg); val &= ~PCI_MSIX_FLAGS_QSIZE; val |= interrupts; @@ -404,6 +478,7 @@ int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no, u8 interrupt_num) { struct dw_pcie *pci = to_dw_pcie_from_ep(ep); + struct dw_pcie_ep_func *ep_func; struct pci_epc *epc = ep->epc; unsigned int aligned_offset; unsigned int func_offset = 0; @@ -413,25 +488,29 @@ int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no, bool has_upper; int ret; - if (!ep->msi_cap) + ep_func = dw_pcie_ep_get_func_from_ep(ep, func_no); + if (!ep_func) + return -EINVAL; + + if (!ep_func->msi_cap) return -EINVAL; func_offset = dw_pcie_ep_func_select(ep, func_no); /* Raise MSI per the PCI Local Bus Specification Revision 3.0, 6.8.1. */ - reg = ep->msi_cap + func_offset + PCI_MSI_FLAGS; + reg = ep_func->msi_cap + func_offset + PCI_MSI_FLAGS; msg_ctrl = dw_pcie_readw_dbi(pci, reg); has_upper = !!(msg_ctrl & PCI_MSI_FLAGS_64BIT); - reg = ep->msi_cap + func_offset + PCI_MSI_ADDRESS_LO; + reg = ep_func->msi_cap + func_offset + PCI_MSI_ADDRESS_LO; msg_addr_lower = dw_pcie_readl_dbi(pci, reg); if (has_upper) { - reg = ep->msi_cap + func_offset + PCI_MSI_ADDRESS_HI; + reg = ep_func->msi_cap + func_offset + PCI_MSI_ADDRESS_HI; msg_addr_upper = dw_pcie_readl_dbi(pci, reg); - reg = ep->msi_cap + func_offset + PCI_MSI_DATA_64; + reg = ep_func->msi_cap + func_offset + PCI_MSI_DATA_64; msg_data = dw_pcie_readw_dbi(pci, reg); } else { msg_addr_upper = 0; - reg = ep->msi_cap + func_offset + PCI_MSI_DATA_32; + reg = ep_func->msi_cap + func_offset + PCI_MSI_DATA_32; msg_data = dw_pcie_readw_dbi(pci, reg); } aligned_offset = msg_addr_lower & (epc->mem->page_size - 1); @@ -467,6 +546,7 @@ int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no, u16 interrupt_num) { struct dw_pcie *pci = to_dw_pcie_from_ep(ep); + struct dw_pcie_ep_func *ep_func; struct pci_epc *epc = ep->epc; u16 tbl_offset, bir; unsigned int func_offset = 0; @@ -477,9 +557,16 @@ int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no, void __iomem *msix_tbl; int ret; + ep_func = dw_pcie_ep_get_func_from_ep(ep, func_no); + if (!ep_func) + return -EINVAL; + + if (!ep_func->msix_cap) + return -EINVAL; + func_offset = dw_pcie_ep_func_select(ep, func_no); - reg = ep->msix_cap + func_offset + PCI_MSIX_TABLE; + reg = ep_func->msix_cap + func_offset + PCI_MSIX_TABLE; tbl_offset = dw_pcie_readl_dbi(pci, reg); bir = (tbl_offset & PCI_MSIX_TABLE_BIR); tbl_offset &= PCI_MSIX_TABLE_OFFSET; @@ -558,6 +645,7 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep) int i; int ret; u32 reg; + u8 func_no; void *addr; u8 hdr_type; unsigned int nbars; @@ -566,6 +654,9 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep) struct dw_pcie *pci = to_dw_pcie_from_ep(ep); struct device *dev = pci->dev; struct device_node *np = dev->of_node; + struct dw_pcie_ep_func *ep_func; + + INIT_LIST_HEAD(&ep->func_list); if (!pci->dbi_base || !pci->dbi_base2) { dev_err(dev, "dbi_base/dbi_base2 is not populated\n"); @@ -632,9 +723,19 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep) if (ret < 0) epc->max_functions = 1; - ep->msi_cap = dw_pcie_find_capability(pci, PCI_CAP_ID_MSI); + for (func_no = 0; func_no < epc->max_functions; func_no++) { + ep_func = devm_kzalloc(dev, sizeof(*ep_func), GFP_KERNEL); + if (!ep_func) + return -ENOMEM; - ep->msix_cap = dw_pcie_find_capability(pci, PCI_CAP_ID_MSIX); + ep_func->func_no = func_no; + ep_func->msi_cap = dw_pcie_ep_find_capability(ep, func_no, + PCI_CAP_ID_MSI); + ep_func->msix_cap = dw_pcie_ep_find_capability(ep, func_no, + PCI_CAP_ID_MSIX); + + list_add_tail(&ep_func->list, &ep->func_list); + } if (ep->ops->ep_init) ep->ops->ep_init(ep); diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index cb32afa..dd9b7b4 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -230,8 +230,16 @@ struct dw_pcie_ep_ops { unsigned int (*func_conf_select)(struct dw_pcie_ep *ep, u8 func_no); }; +struct dw_pcie_ep_func { + struct list_head list; + u8 func_no; + u8 msi_cap; /* MSI capability offset */ + u8 msix_cap; /* MSI-X capability offset */ +}; + struct dw_pcie_ep { struct pci_epc *epc; + struct list_head func_list; const struct dw_pcie_ep_ops *ops; phys_addr_t phys_base; size_t addr_size; @@ -244,8 +252,6 @@ struct dw_pcie_ep { u32 num_ob_windows; void __iomem *msi_mem; phys_addr_t msi_mem_phys; - u8 msi_cap; /* MSI capability offset */ - u8 msix_cap; /* MSI-X capability offset */ }; struct dw_pcie_ops { @@ -437,6 +443,8 @@ int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no, int dw_pcie_ep_raise_msix_irq_doorbell(struct dw_pcie_ep *ep, u8 func_no, u16 interrupt_num); void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar); +struct dw_pcie_ep_func * +dw_pcie_ep_get_func_from_ep(struct dw_pcie_ep *ep, u8 func_no); #else static inline void dw_pcie_ep_linkup(struct dw_pcie_ep *ep) { @@ -478,5 +486,11 @@ static inline int dw_pcie_ep_raise_msix_irq_doorbell(struct dw_pcie_ep *ep, static inline void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar) { } + +static inline struct dw_pcie_ep_func * +dw_pcie_ep_get_func_from_ep(struct dw_pcie_ep *ep, u8 func_no) +{ + return NULL; +} #endif #endif /* _PCIE_DESIGNWARE_H */ -- 2.9.5