From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e23smtp05.au.ibm.com (e23smtp05.au.ibm.com [202.81.31.147]) (using TLSv1 with cipher CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4799B1A18F4 for ; Fri, 15 May 2015 23:41:49 +1000 (AEST) Received: from /spool/local by e23smtp05.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 15 May 2015 23:41:49 +1000 Received: from d23relay07.au.ibm.com (d23relay07.au.ibm.com [9.190.26.37]) by d23dlp03.au.ibm.com (Postfix) with ESMTP id 92E9F357804C for ; Fri, 15 May 2015 23:41:45 +1000 (EST) Received: from d23av01.au.ibm.com (d23av01.au.ibm.com [9.190.234.96]) by d23relay07.au.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t4FDfbH418546732 for ; Fri, 15 May 2015 23:41:45 +1000 Received: from d23av01.au.ibm.com (localhost [127.0.0.1]) by d23av01.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t4FDfC1X013153 for ; Fri, 15 May 2015 23:41:13 +1000 From: Wei Yang To: gwshan@linux.vnet.ibm.com, bhelgaas@google.com Subject: [PATCH V5 10/10] powerpc/powernv: compound PE for VFs Date: Fri, 15 May 2015 21:37:04 +0800 Message-Id: <1431697024-5710-11-git-send-email-weiyang@linux.vnet.ibm.com> In-Reply-To: <1431697024-5710-1-git-send-email-weiyang@linux.vnet.ibm.com> References: <1431697024-5710-1-git-send-email-weiyang@linux.vnet.ibm.com> Cc: linux-pci@vger.kernel.org, Wei Yang , linuxppc-dev@lists.ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , When VF BAR size is larger than 64MB, we group VFs in terms of M64 BAR, which means those VFs in a group should form a compound PE. This patch links those VF PEs into compound PE in this case. Signed-off-by: Wei Yang --- arch/powerpc/platforms/powernv/pci-ioda.c | 50 ++++++++++++++++++++++++++--- arch/powerpc/platforms/powernv/pci.c | 17 ++++++++-- 2 files changed, 60 insertions(+), 7 deletions(-) diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index 920c252..23fe8aa 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -1345,6 +1345,7 @@ static void pnv_ioda_release_vf_PE(struct pci_dev *pdev, u16 num_vfs) vf_index < (vf_group + 1) * vf_per_group && vf_index < num_vfs; vf_index++) + for (vf_index1 = vf_group * vf_per_group; vf_index1 < (vf_group + 1) * vf_per_group && vf_index1 < num_vfs; @@ -1363,9 +1364,20 @@ static void pnv_ioda_release_vf_PE(struct pci_dev *pdev, u16 num_vfs) } list_for_each_entry_safe(pe, pe_n, &phb->ioda.pe_list, list) { + struct pnv_ioda_pe *s, *sn; if (pe->parent_dev != pdev) continue; + if ((pe->flags & PNV_IODA_PE_MASTER) && + (pe->flags & PNV_IODA_PE_VF)) { + list_for_each_entry_safe(s, sn, &pe->slaves, list) { + pnv_pci_ioda2_release_dma_pe(pdev, s); + list_del(&s->list); + pnv_ioda_deconfigure_pe(phb, s); + pnv_ioda_free_pe(phb, s->pe_number); + } + } + pnv_pci_ioda2_release_dma_pe(pdev, pe); /* Remove from list */ @@ -1418,7 +1430,7 @@ static void pnv_ioda_setup_vf_PE(struct pci_dev *pdev, u16 num_vfs) struct pci_bus *bus; struct pci_controller *hose; struct pnv_phb *phb; - struct pnv_ioda_pe *pe; + struct pnv_ioda_pe *pe, *master_pe; int pe_num; u16 vf_index; struct pci_dn *pdn; @@ -1464,10 +1476,16 @@ static void pnv_ioda_setup_vf_PE(struct pci_dev *pdev, u16 num_vfs) GFP_KERNEL, hose->node); pe->tce32_table->data = pe; - /* Put PE to the list */ - mutex_lock(&phb->ioda.pe_list_mutex); - list_add_tail(&pe->list, &phb->ioda.pe_list); - mutex_unlock(&phb->ioda.pe_list_mutex); + /* + * Put PE to the list, + * or postpone this if we have Compound PE + */ + if ((pdn->m64_per_iov != M64_PER_IOV) || + (num_vfs <= M64_PER_IOV)) { + mutex_lock(&phb->ioda.pe_list_mutex); + list_add_tail(&pe->list, &phb->ioda.pe_list); + mutex_unlock(&phb->ioda.pe_list_mutex); + } pnv_pci_ioda2_setup_dma_pe(phb, pe); } @@ -1480,10 +1498,32 @@ static void pnv_ioda_setup_vf_PE(struct pci_dev *pdev, u16 num_vfs) vf_per_group = roundup_pow_of_two(num_vfs) / pdn->m64_per_iov; for (vf_group = 0; vf_group < M64_PER_IOV; vf_group++) { + master_pe = NULL; + for (vf_index = vf_group * vf_per_group; vf_index < (vf_group + 1) * vf_per_group && vf_index < num_vfs; vf_index++) { + + /* + * Figure out the master PE and put all slave + * PEs to master PE's list. + */ + pe = &phb->ioda.pe_array[pdn->offset + vf_index]; + if (!master_pe) { + pe->flags |= PNV_IODA_PE_MASTER; + INIT_LIST_HEAD(&pe->slaves); + master_pe = pe; + mutex_lock(&phb->ioda.pe_list_mutex); + list_add_tail(&pe->list, &phb->ioda.pe_list); + mutex_unlock(&phb->ioda.pe_list_mutex); + } else { + pe->flags |= PNV_IODA_PE_SLAVE; + pe->master = master_pe; + list_add_tail(&pe->list, + &master_pe->slaves); + } + for (vf_index1 = vf_group * vf_per_group; vf_index1 < (vf_group + 1) * vf_per_group && vf_index1 < num_vfs; diff --git a/arch/powerpc/platforms/powernv/pci.c b/arch/powerpc/platforms/powernv/pci.c index 31d0258..073caec 100644 --- a/arch/powerpc/platforms/powernv/pci.c +++ b/arch/powerpc/platforms/powernv/pci.c @@ -667,7 +667,7 @@ static void pnv_pci_dma_dev_setup(struct pci_dev *pdev) struct pci_controller *hose = pci_bus_to_host(pdev->bus); struct pnv_phb *phb = hose->private_data; #ifdef CONFIG_PCI_IOV - struct pnv_ioda_pe *pe; + struct pnv_ioda_pe *pe, *slave; struct pci_dn *pdn; /* Fix the VF pdn PE number */ @@ -679,10 +679,23 @@ static void pnv_pci_dma_dev_setup(struct pci_dev *pdev) (pdev->devfn & 0xff))) { pdn->pe_number = pe->pe_number; pe->pdev = pdev; - break; + goto found; + } + + if ((pe->flags & PNV_IODA_PE_MASTER) && + (pe->flags & PNV_IODA_PE_VF)) { + list_for_each_entry(slave, &pe->slaves, list) { + if (slave->rid == ((pdev->bus->number << 8) + | (pdev->devfn & 0xff))) { + pdn->pe_number = slave->pe_number; + slave->pdev = pdev; + goto found; + } + } } } } +found: #endif /* CONFIG_PCI_IOV */ if (phb && phb->dma_dev_setup) -- 1.7.9.5