From patchwork Wed Oct 30 16:59:50 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Reza Arbab X-Patchwork-Id: 1186867 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 473FR5709Nz9sPL for ; Thu, 31 Oct 2019 04:13:37 +1100 (AEDT) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 473FR549J4zF4Wn for ; Thu, 31 Oct 2019 04:13:37 +1100 (AEDT) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; 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Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: from b01ledav006.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2E892AC065; Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: from arbab-laptop.localdomain (unknown [9.53.179.210]) by b01ledav006.gho.pok.ibm.com (Postfix) with ESMTP; Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: by arbab-laptop.localdomain (Postfix, from userid 152845) id 4562F465432; Wed, 30 Oct 2019 12:00:00 -0500 (CDT) From: Reza Arbab To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH 01/11] Revert "powerpc/powernv: Remove unused pnv_npu_try_dma_set_bypass() function" Date: Wed, 30 Oct 2019 11:59:50 -0500 Message-Id: <1572454800-17976-2-git-send-email-arbab@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1572454800-17976-1-git-send-email-arbab@linux.ibm.com> References: <1572454800-17976-1-git-send-email-arbab@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-10-30_07:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=929 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1910300150 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Andrew Donnellan , Alexey Kardashevskiy , Oliver O'Halloran , Alistair Popple , Paul Mackerras , Thomas Gleixner , Christoph Hellwig Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Revert commit b4d37a7b6934 ("powerpc/powernv: Remove unused pnv_npu_try_dma_set_bypass() function") so that this function can be reintegrated. Fixes: 2d6ad41b2c21 ("powerpc/powernv: use the generic iommu bypass code") Signed-off-by: Reza Arbab Cc: Christoph Hellwig --- arch/powerpc/platforms/powernv/npu-dma.c | 99 ++++++++++++++++++++++++++++++++ 1 file changed, 99 insertions(+) diff --git a/arch/powerpc/platforms/powernv/npu-dma.c b/arch/powerpc/platforms/powernv/npu-dma.c index b95b9e3c4c98..5a8313654033 100644 --- a/arch/powerpc/platforms/powernv/npu-dma.c +++ b/arch/powerpc/platforms/powernv/npu-dma.c @@ -193,6 +193,105 @@ static long pnv_npu_unset_window(struct iommu_table_group *table_group, int num) return 0; } +/* + * Enables 32 bit DMA on NPU. + */ +static void pnv_npu_dma_set_32(struct pnv_ioda_pe *npe) +{ + struct pci_dev *gpdev; + struct pnv_ioda_pe *gpe; + int64_t rc; + + /* + * Find the assoicated PCI devices and get the dma window + * information from there. + */ + if (!npe->pdev || !(npe->flags & PNV_IODA_PE_DEV)) + return; + + gpe = get_gpu_pci_dev_and_pe(npe, &gpdev); + if (!gpe) + return; + + rc = pnv_npu_set_window(&npe->table_group, 0, + gpe->table_group.tables[0]); + + /* + * NVLink devices use the same TCE table configuration as + * their parent device so drivers shouldn't be doing DMA + * operations directly on these devices. + */ + set_dma_ops(&npe->pdev->dev, &dma_dummy_ops); +} + +/* + * Enables bypass mode on the NPU. The NPU only supports one + * window per link, so bypass needs to be explicitly enabled or + * disabled. Unlike for a PHB3 bypass and non-bypass modes can't be + * active at the same time. + */ +static int pnv_npu_dma_set_bypass(struct pnv_ioda_pe *npe) +{ + struct pnv_phb *phb = npe->phb; + int64_t rc = 0; + phys_addr_t top = memblock_end_of_DRAM(); + + if (phb->type != PNV_PHB_NPU_NVLINK || !npe->pdev) + return -EINVAL; + + rc = pnv_npu_unset_window(&npe->table_group, 0); + if (rc != OPAL_SUCCESS) + return rc; + + /* Enable the bypass window */ + + top = roundup_pow_of_two(top); + dev_info(&npe->pdev->dev, "Enabling bypass for PE %x\n", + npe->pe_number); + rc = opal_pci_map_pe_dma_window_real(phb->opal_id, + npe->pe_number, npe->pe_number, + 0 /* bypass base */, top); + + if (rc == OPAL_SUCCESS) + pnv_pci_ioda2_tce_invalidate_entire(phb, false); + + return rc; +} + +void pnv_npu_try_dma_set_bypass(struct pci_dev *gpdev, bool bypass) +{ + int i; + struct pnv_phb *phb; + struct pci_dn *pdn; + struct pnv_ioda_pe *npe; + struct pci_dev *npdev; + + for (i = 0; ; ++i) { + npdev = pnv_pci_get_npu_dev(gpdev, i); + + if (!npdev) + break; + + pdn = pci_get_pdn(npdev); + if (WARN_ON(!pdn || pdn->pe_number == IODA_INVALID_PE)) + return; + + phb = pci_bus_to_host(npdev->bus)->private_data; + + /* We only do bypass if it's enabled on the linked device */ + npe = &phb->ioda.pe_array[pdn->pe_number]; + + if (bypass) { + dev_info(&npdev->dev, + "Using 64-bit DMA iommu bypass\n"); + pnv_npu_dma_set_bypass(npe); + } else { + dev_info(&npdev->dev, "Using 32-bit DMA via iommu\n"); + pnv_npu_dma_set_32(npe); + } + } +} + /* Switch ownership from platform code to external user (e.g. VFIO) */ static void pnv_npu_take_ownership(struct iommu_table_group *table_group) { From patchwork Wed Oct 30 16:59:51 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Reza Arbab X-Patchwork-Id: 1186871 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 473Fb35Lm5z9sNw for ; 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Wed, 30 Oct 2019 17:00:01 +0000 Received: from b01ledav002.gho.pok.ibm.com (b01ledav002.gho.pok.ibm.com [9.57.199.107]) by b01cxnp22035.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x9UH01vY41419010 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 30 Oct 2019 17:00:01 GMT Received: from b01ledav002.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4A7C6124060; Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: from b01ledav002.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 36A2A12405C; Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: from arbab-laptop.localdomain (unknown [9.53.179.210]) by b01ledav002.gho.pok.ibm.com (Postfix) with ESMTP; Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: by arbab-laptop.localdomain (Postfix, from userid 152845) id 484D14654A4; Wed, 30 Oct 2019 12:00:00 -0500 (CDT) From: Reza Arbab To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH 02/11] powerpc/powernv: Add pnv_ioda_pe_iommu_bypass_supported() Date: Wed, 30 Oct 2019 11:59:51 -0500 Message-Id: <1572454800-17976-3-git-send-email-arbab@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1572454800-17976-1-git-send-email-arbab@linux.ibm.com> References: <1572454800-17976-1-git-send-email-arbab@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-10-30_07:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1910300150 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Andrew Donnellan , Alexey Kardashevskiy , Oliver O'Halloran , Alistair Popple , Paul Mackerras , Thomas Gleixner , Christoph Hellwig Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" This little calculation will be needed in other places. Move it to a convenience function. Signed-off-by: Reza Arbab --- arch/powerpc/platforms/powernv/pci-ioda.c | 8 +++----- arch/powerpc/platforms/powernv/pci.h | 8 ++++++++ 2 files changed, 11 insertions(+), 5 deletions(-) diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index c28d0d9b7ee0..8849218187d7 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -1838,11 +1838,9 @@ static bool pnv_pci_ioda_iommu_bypass_supported(struct pci_dev *pdev, return false; pe = &phb->ioda.pe_array[pdn->pe_number]; - if (pe->tce_bypass_enabled) { - u64 top = pe->tce_bypass_base + memblock_end_of_DRAM() - 1; - if (dma_mask >= top) - return true; - } + + if (pnv_ioda_pe_iommu_bypass_supported(pe, dma_mask)) + return true; /* * If the device can't set the TCE bypass bit but still wants diff --git a/arch/powerpc/platforms/powernv/pci.h b/arch/powerpc/platforms/powernv/pci.h index f914f0b14e4e..41f7dec3aee5 100644 --- a/arch/powerpc/platforms/powernv/pci.h +++ b/arch/powerpc/platforms/powernv/pci.h @@ -4,6 +4,7 @@ #include /* for __printf */ #include +#include #include #include @@ -247,4 +248,11 @@ extern void pnv_pci_setup_iommu_table(struct iommu_table *tbl, void *tce_mem, u64 tce_size, u64 dma_offset, unsigned int page_shift); +static inline bool pnv_ioda_pe_iommu_bypass_supported(struct pnv_ioda_pe *pe, + u64 mask) +{ + return pe->tce_bypass_enabled && + mask >= pe->tce_bypass_base + memblock_end_of_DRAM() - 1; +} + #endif /* __POWERNV_PCI_H */ From patchwork Wed Oct 30 16:59:52 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Reza Arbab X-Patchwork-Id: 1186877 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 473Fl11kpYz9sNw for ; Thu, 31 Oct 2019 04:27:25 +1100 (AEDT) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 473Fl02MBfzF3gd for ; Thu, 31 Oct 2019 04:27:24 +1100 (AEDT) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.ibm.com (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=arbab@linux.ibm.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 473F7p3Fm0zF4RR for ; Thu, 31 Oct 2019 04:00:22 +1100 (AEDT) Received: from pps.filterd (m0187473.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x9UGct7p018951; Wed, 30 Oct 2019 13:00:16 -0400 Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 2vxwmqn6s9-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); 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Wed, 30 Oct 2019 17:00:01 GMT Received: from b01ledav004.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4BF91112061; Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: from b01ledav004.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3851A11206F; Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: from arbab-laptop.localdomain (unknown [9.53.179.210]) by b01ledav004.gho.pok.ibm.com (Postfix) with ESMTP; Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: by arbab-laptop.localdomain (Postfix, from userid 152845) id 50AE94654A7; Wed, 30 Oct 2019 12:00:00 -0500 (CDT) From: Reza Arbab To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH 03/11] powerpc/powernv/npu: Change pnv_npu_try_dma_set_bypass() argument Date: Wed, 30 Oct 2019 11:59:52 -0500 Message-Id: <1572454800-17976-4-git-send-email-arbab@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1572454800-17976-1-git-send-email-arbab@linux.ibm.com> References: <1572454800-17976-1-git-send-email-arbab@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-10-30_07:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1910300150 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Andrew Donnellan , Alexey Kardashevskiy , Oliver O'Halloran , Alistair Popple , Paul Mackerras , Thomas Gleixner , Christoph Hellwig Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" To enable simpler calling code, change this function to find the value of bypass instead of taking it as an argument. Signed-off-by: Reza Arbab --- arch/powerpc/platforms/powernv/npu-dma.c | 12 +++++++++--- arch/powerpc/platforms/powernv/pci.h | 2 +- 2 files changed, 10 insertions(+), 4 deletions(-) diff --git a/arch/powerpc/platforms/powernv/npu-dma.c b/arch/powerpc/platforms/powernv/npu-dma.c index 5a8313654033..a6b8c7ad36e4 100644 --- a/arch/powerpc/platforms/powernv/npu-dma.c +++ b/arch/powerpc/platforms/powernv/npu-dma.c @@ -258,13 +258,21 @@ static int pnv_npu_dma_set_bypass(struct pnv_ioda_pe *npe) return rc; } -void pnv_npu_try_dma_set_bypass(struct pci_dev *gpdev, bool bypass) +void pnv_npu_try_dma_set_bypass(struct pci_dev *gpdev, u64 mask) { + struct pnv_ioda_pe *gpe = pnv_ioda_get_pe(gpdev); int i; struct pnv_phb *phb; struct pci_dn *pdn; struct pnv_ioda_pe *npe; struct pci_dev *npdev; + bool bypass; + + if (!gpe) + return; + + /* We only do bypass if it's enabled on the linked device */ + bypass = pnv_ioda_pe_iommu_bypass_supported(gpe, mask); for (i = 0; ; ++i) { npdev = pnv_pci_get_npu_dev(gpdev, i); @@ -277,8 +285,6 @@ void pnv_npu_try_dma_set_bypass(struct pci_dev *gpdev, bool bypass) return; phb = pci_bus_to_host(npdev->bus)->private_data; - - /* We only do bypass if it's enabled on the linked device */ npe = &phb->ioda.pe_array[pdn->pe_number]; if (bypass) { diff --git a/arch/powerpc/platforms/powernv/pci.h b/arch/powerpc/platforms/powernv/pci.h index 41f7dec3aee5..21db0f4cfb11 100644 --- a/arch/powerpc/platforms/powernv/pci.h +++ b/arch/powerpc/platforms/powernv/pci.h @@ -211,7 +211,7 @@ extern void pe_level_printk(const struct pnv_ioda_pe *pe, const char *level, pe_level_printk(pe, KERN_INFO, fmt, ##__VA_ARGS__) /* Nvlink functions */ -extern void pnv_npu_try_dma_set_bypass(struct pci_dev *gpdev, bool bypass); +extern void pnv_npu_try_dma_set_bypass(struct pci_dev *gpdev, u64 mask); extern void pnv_pci_ioda2_tce_invalidate_entire(struct pnv_phb *phb, bool rm); extern struct pnv_ioda_pe *pnv_pci_npu_setup_iommu(struct pnv_ioda_pe *npe); extern struct iommu_table_group *pnv_try_setup_npu_table_group( From patchwork Wed Oct 30 16:59:53 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Reza Arbab X-Patchwork-Id: 1186861 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 473FDc0x5Nz9sPK for ; Thu, 31 Oct 2019 04:04:32 +1100 (AEDT) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 473FDb6GkRzF4Tk for ; Thu, 31 Oct 2019 04:04:31 +1100 (AEDT) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.ibm.com (client-ip=148.163.156.1; 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Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: by arbab-laptop.localdomain (Postfix, from userid 152845) id 5562A4654A9; Wed, 30 Oct 2019 12:00:00 -0500 (CDT) From: Reza Arbab To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH 04/11] powerpc/powernv/npu: Wire up pnv_npu_try_dma_set_bypass() Date: Wed, 30 Oct 2019 11:59:53 -0500 Message-Id: <1572454800-17976-5-git-send-email-arbab@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1572454800-17976-1-git-send-email-arbab@linux.ibm.com> References: <1572454800-17976-1-git-send-email-arbab@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-10-30_07:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1910300150 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Andrew Donnellan , Alexey Kardashevskiy , Oliver O'Halloran , Alistair Popple , Paul Mackerras , Thomas Gleixner , Christoph Hellwig Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Rework of pnv_pci_ioda_iommu_bypass_supported() dropped a call to pnv_npu_try_dma_set_bypass(). Reintroduce this call, so that the DMA bypass configuration of a GPU device is propagated to its corresponding NPU devices. Fixes: 2d6ad41b2c21 ("powerpc/powernv: use the generic iommu bypass code") Signed-off-by: Reza Arbab Cc: Christoph Hellwig --- arch/powerpc/platforms/powernv/pci-ioda.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index 8849218187d7..70e834635971 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -1833,14 +1833,13 @@ static bool pnv_pci_ioda_iommu_bypass_supported(struct pci_dev *pdev, struct pnv_phb *phb = hose->private_data; struct pci_dn *pdn = pci_get_pdn(pdev); struct pnv_ioda_pe *pe; + bool bypass; if (WARN_ON(!pdn || pdn->pe_number == IODA_INVALID_PE)) return false; pe = &phb->ioda.pe_array[pdn->pe_number]; - - if (pnv_ioda_pe_iommu_bypass_supported(pe, dma_mask)) - return true; + bypass = pnv_ioda_pe_iommu_bypass_supported(pe, dma_mask); /* * If the device can't set the TCE bypass bit but still wants @@ -1848,7 +1847,8 @@ static bool pnv_pci_ioda_iommu_bypass_supported(struct pci_dev *pdev, * bypass the 32-bit region and be usable for 64-bit DMAs. * The device needs to be able to address all of this space. */ - if (dma_mask >> 32 && + if (!bypass && + dma_mask >> 32 && dma_mask > (memory_hotplug_max() + (1ULL << 32)) && /* pe->pdev should be set if it's a single device, pe->pbus if not */ (pe->device_count == 1 || !pe->pbus) && @@ -1859,10 +1859,14 @@ static bool pnv_pci_ioda_iommu_bypass_supported(struct pci_dev *pdev, return false; /* 4GB offset bypasses 32-bit space */ pdev->dev.archdata.dma_offset = (1ULL << 32); - return true; + + bypass = true; } - return false; + /* Update peer npu devices */ + pnv_npu_try_dma_set_bypass(pdev, dma_mask); + + return bypass; } static void pnv_ioda_setup_bus_dma(struct pnv_ioda_pe *pe, struct pci_bus *bus) From patchwork Wed Oct 30 16:59:54 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Reza Arbab X-Patchwork-Id: 1186863 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 473FH52wlLz9s7T for ; Thu, 31 Oct 2019 04:06:41 +1100 (AEDT) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 473FH523ZvzF35f for ; 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Wed, 30 Oct 2019 17:00:02 GMT Received: from b01ledav001.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B7DA328065; Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: from b01ledav001.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A4C452805E; Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: from arbab-laptop.localdomain (unknown [9.53.179.210]) by b01ledav001.gho.pok.ibm.com (Postfix) with ESMTP; Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: by arbab-laptop.localdomain (Postfix, from userid 152845) id 5AB534654AA; Wed, 30 Oct 2019 12:00:00 -0500 (CDT) From: Reza Arbab To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH 05/11] powerpc/powernv: Return failure for some uses of dma_set_mask() Date: Wed, 30 Oct 2019 11:59:54 -0500 Message-Id: <1572454800-17976-6-git-send-email-arbab@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1572454800-17976-1-git-send-email-arbab@linux.ibm.com> References: <1572454800-17976-1-git-send-email-arbab@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-10-30_07:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=921 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1910300150 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Andrew Donnellan , Alexey Kardashevskiy , Oliver O'Halloran , Alistair Popple , Paul Mackerras , Thomas Gleixner , Christoph Hellwig Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Rework of pnv_pci_ioda_dma_set_mask() effectively reverted commit 253fd51e2f53 ("powerpc/powernv/pci: Return failure for some uses of dma_set_mask()"). Reintroduce the desired behavior that an unfulfilled request for a DMA mask between 32 and 64 bits will return error instead of silently falling back to 32 bits. Fixes: 2d6ad41b2c21 ("powerpc/powernv: use the generic iommu bypass code") Signed-off-by: Reza Arbab Cc: Christoph Hellwig --- arch/powerpc/kernel/dma-iommu.c | 19 +++++++++++++++---- arch/powerpc/platforms/powernv/pci-ioda.c | 8 ++++++-- 2 files changed, 21 insertions(+), 6 deletions(-) diff --git a/arch/powerpc/kernel/dma-iommu.c b/arch/powerpc/kernel/dma-iommu.c index e486d1d78de2..e1693760654b 100644 --- a/arch/powerpc/kernel/dma-iommu.c +++ b/arch/powerpc/kernel/dma-iommu.c @@ -122,10 +122,21 @@ int dma_iommu_dma_supported(struct device *dev, u64 mask) { struct iommu_table *tbl = get_iommu_table_base(dev); - if (dev_is_pci(dev) && dma_iommu_bypass_supported(dev, mask)) { - dev->archdata.iommu_bypass = true; - dev_dbg(dev, "iommu: 64-bit OK, using fixed ops\n"); - return 1; + if (dev_is_pci(dev)) { + if (dma_iommu_bypass_supported(dev, mask)) { + dev->archdata.iommu_bypass = true; + dev_dbg(dev, "iommu: 64-bit OK, using fixed ops\n"); + return 1; + } + + if (mask >> 32) { + dev_err(dev, "Warning: IOMMU dma bypass not supported: mask 0x%016llx\n", + mask); + + /* A 64-bit request falls back to default ops */ + if (mask != DMA_BIT_MASK(64)) + return 0; + } } if (!tbl) { diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index 70e834635971..b78b5e81f941 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -1863,8 +1863,12 @@ static bool pnv_pci_ioda_iommu_bypass_supported(struct pci_dev *pdev, bypass = true; } - /* Update peer npu devices */ - pnv_npu_try_dma_set_bypass(pdev, dma_mask); + /* + * Update peer npu devices. We also do this for the special case where + * a 64-bit dma mask can't be fulfilled and falls back to default. + */ + if (bypass || !(dma_mask >> 32) || dma_mask == DMA_BIT_MASK(64)) + pnv_npu_try_dma_set_bypass(pdev, dma_mask); return bypass; } From patchwork Wed Oct 30 16:59:55 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Reza Arbab X-Patchwork-Id: 1186860 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 473F9n0bNnz9sPd for ; Thu, 31 Oct 2019 04:02:05 +1100 (AEDT) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 473F9m5cLWzF3my for ; 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Wed, 30 Oct 2019 17:00:01 GMT Received: from b01ledav002.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B6D1B124060; Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: from b01ledav002.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A366712405A; Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: from arbab-laptop.localdomain (unknown [9.53.179.210]) by b01ledav002.gho.pok.ibm.com (Postfix) with ESMTP; Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: by arbab-laptop.localdomain (Postfix, from userid 152845) id 5FBCC4654AB; Wed, 30 Oct 2019 12:00:00 -0500 (CDT) From: Reza Arbab To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH 06/11] powerpc/powernv: Remove intermediate variable Date: Wed, 30 Oct 2019 11:59:55 -0500 Message-Id: <1572454800-17976-7-git-send-email-arbab@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1572454800-17976-1-git-send-email-arbab@linux.ibm.com> References: <1572454800-17976-1-git-send-email-arbab@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-10-30_07:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=951 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1910300150 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Andrew Donnellan , Alexey Kardashevskiy , Oliver O'Halloran , Alistair Popple , Paul Mackerras , Thomas Gleixner , Christoph Hellwig Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Trim the pointless temporary variable. Signed-off-by: Reza Arbab --- arch/powerpc/platforms/powernv/pci-ioda.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index b78b5e81f941..319152d30bc3 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -1854,9 +1854,9 @@ static bool pnv_pci_ioda_iommu_bypass_supported(struct pci_dev *pdev, (pe->device_count == 1 || !pe->pbus) && phb->model == PNV_PHB_MODEL_PHB3) { /* Configure the bypass mode */ - s64 rc = pnv_pci_ioda_dma_64bit_bypass(pe); - if (rc) + if (pnv_pci_ioda_dma_64bit_bypass(pe)) return false; + /* 4GB offset bypasses 32-bit space */ pdev->dev.archdata.dma_offset = (1ULL << 32); From patchwork Wed Oct 30 16:59:56 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Reza Arbab X-Patchwork-Id: 1186868 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 473FTS5Y4Bz9sPd for ; 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Wed, 30 Oct 2019 17:00:02 +0000 Received: from b01ledav004.gho.pok.ibm.com (b01ledav004.gho.pok.ibm.com [9.57.199.109]) by b01cxnp22034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x9UH01Ae54722946 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 30 Oct 2019 17:00:01 GMT Received: from b01ledav004.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id BB3C5112063; Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: from b01ledav004.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A909C112061; Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: from arbab-laptop.localdomain (unknown [9.53.179.210]) by b01ledav004.gho.pok.ibm.com (Postfix) with ESMTP; Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: by arbab-laptop.localdomain (Postfix, from userid 152845) id 678574654AC; Wed, 30 Oct 2019 12:00:00 -0500 (CDT) From: Reza Arbab To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH 07/11] powerpc/powernv/npu: Simplify pnv_npu_try_dma_set_bypass() loop Date: Wed, 30 Oct 2019 11:59:56 -0500 Message-Id: <1572454800-17976-8-git-send-email-arbab@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1572454800-17976-1-git-send-email-arbab@linux.ibm.com> References: <1572454800-17976-1-git-send-email-arbab@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-10-30_07:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1910300150 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Andrew Donnellan , Alexey Kardashevskiy , Oliver O'Halloran , Alistair Popple , Paul Mackerras , Thomas Gleixner , Christoph Hellwig Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Write this loop more compactly to improve readability. Signed-off-by: Reza Arbab --- arch/powerpc/platforms/powernv/npu-dma.c | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-) diff --git a/arch/powerpc/platforms/powernv/npu-dma.c b/arch/powerpc/platforms/powernv/npu-dma.c index a6b8c7ad36e4..a77ce7d71634 100644 --- a/arch/powerpc/platforms/powernv/npu-dma.c +++ b/arch/powerpc/platforms/powernv/npu-dma.c @@ -261,12 +261,12 @@ static int pnv_npu_dma_set_bypass(struct pnv_ioda_pe *npe) void pnv_npu_try_dma_set_bypass(struct pci_dev *gpdev, u64 mask) { struct pnv_ioda_pe *gpe = pnv_ioda_get_pe(gpdev); - int i; struct pnv_phb *phb; struct pci_dn *pdn; struct pnv_ioda_pe *npe; struct pci_dev *npdev; bool bypass; + int i = 0; if (!gpe) return; @@ -274,12 +274,7 @@ void pnv_npu_try_dma_set_bypass(struct pci_dev *gpdev, u64 mask) /* We only do bypass if it's enabled on the linked device */ bypass = pnv_ioda_pe_iommu_bypass_supported(gpe, mask); - for (i = 0; ; ++i) { - npdev = pnv_pci_get_npu_dev(gpdev, i); - - if (!npdev) - break; - + while ((npdev = pnv_pci_get_npu_dev(gpdev, i++))) { pdn = pci_get_pdn(npdev); if (WARN_ON(!pdn || pdn->pe_number == IODA_INVALID_PE)) return; From patchwork Wed Oct 30 16:59:57 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Reza Arbab X-Patchwork-Id: 1186866 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 473FNn2RR4z9s7T for ; Thu, 31 Oct 2019 04:11:37 +1100 (AEDT) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 473FNm5MXbzDrnP for ; Thu, 31 Oct 2019 04:11:36 +1100 (AEDT) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; 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Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: from b01ledav006.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A0DC3AC06F; Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: from arbab-laptop.localdomain (unknown [9.53.179.210]) by b01ledav006.gho.pok.ibm.com (Postfix) with ESMTP; Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: by arbab-laptop.localdomain (Postfix, from userid 152845) id 6CA904654AE; Wed, 30 Oct 2019 12:00:00 -0500 (CDT) From: Reza Arbab To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH 08/11] powerpc/powernv: Replace open coded pnv_ioda_get_pe()s Date: Wed, 30 Oct 2019 11:59:57 -0500 Message-Id: <1572454800-17976-9-git-send-email-arbab@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1572454800-17976-1-git-send-email-arbab@linux.ibm.com> References: <1572454800-17976-1-git-send-email-arbab@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-10-30_07:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=840 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1910300150 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Andrew Donnellan , Alexey Kardashevskiy , Oliver O'Halloran , Alistair Popple , Paul Mackerras , Thomas Gleixner , Christoph Hellwig Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Collapse several open coded instances of pnv_ioda_get_pe(). Signed-off-by: Reza Arbab --- arch/powerpc/platforms/powernv/npu-dma.c | 22 +++++----------------- arch/powerpc/platforms/powernv/pci-ioda.c | 10 +++------- 2 files changed, 8 insertions(+), 24 deletions(-) diff --git a/arch/powerpc/platforms/powernv/npu-dma.c b/arch/powerpc/platforms/powernv/npu-dma.c index a77ce7d71634..0010b21d45b8 100644 --- a/arch/powerpc/platforms/powernv/npu-dma.c +++ b/arch/powerpc/platforms/powernv/npu-dma.c @@ -97,24 +97,17 @@ struct pci_dev *pnv_pci_get_npu_dev(struct pci_dev *gpdev, int index) static struct pnv_ioda_pe *get_gpu_pci_dev_and_pe(struct pnv_ioda_pe *npe, struct pci_dev **gpdev) { - struct pnv_phb *phb; - struct pci_controller *hose; struct pci_dev *pdev; struct pnv_ioda_pe *pe; - struct pci_dn *pdn; pdev = pnv_pci_get_gpu_dev(npe->pdev); if (!pdev) return NULL; - pdn = pci_get_pdn(pdev); - if (WARN_ON(!pdn || pdn->pe_number == IODA_INVALID_PE)) + pe = pnv_ioda_get_pe(pdev); + if (WARN_ON(!pe)) return NULL; - hose = pci_bus_to_host(pdev->bus); - phb = hose->private_data; - pe = &phb->ioda.pe_array[pdn->pe_number]; - if (gpdev) *gpdev = pdev; @@ -261,9 +254,6 @@ static int pnv_npu_dma_set_bypass(struct pnv_ioda_pe *npe) void pnv_npu_try_dma_set_bypass(struct pci_dev *gpdev, u64 mask) { struct pnv_ioda_pe *gpe = pnv_ioda_get_pe(gpdev); - struct pnv_phb *phb; - struct pci_dn *pdn; - struct pnv_ioda_pe *npe; struct pci_dev *npdev; bool bypass; int i = 0; @@ -275,12 +265,10 @@ void pnv_npu_try_dma_set_bypass(struct pci_dev *gpdev, u64 mask) bypass = pnv_ioda_pe_iommu_bypass_supported(gpe, mask); while ((npdev = pnv_pci_get_npu_dev(gpdev, i++))) { - pdn = pci_get_pdn(npdev); - if (WARN_ON(!pdn || pdn->pe_number == IODA_INVALID_PE)) - return; + struct pnv_ioda_pe *npe = pnv_ioda_get_pe(npdev); - phb = pci_bus_to_host(npdev->bus)->private_data; - npe = &phb->ioda.pe_array[pdn->pe_number]; + if (WARN_ON(!npe)) + return; if (bypass) { dev_info(&npdev->dev, diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index 319152d30bc3..6b932cfc0deb 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -1829,16 +1829,12 @@ static int pnv_pci_ioda_dma_64bit_bypass(struct pnv_ioda_pe *pe) static bool pnv_pci_ioda_iommu_bypass_supported(struct pci_dev *pdev, u64 dma_mask) { - struct pci_controller *hose = pci_bus_to_host(pdev->bus); - struct pnv_phb *phb = hose->private_data; - struct pci_dn *pdn = pci_get_pdn(pdev); - struct pnv_ioda_pe *pe; + struct pnv_ioda_pe *pe = pnv_ioda_get_pe(pdev); bool bypass; - if (WARN_ON(!pdn || pdn->pe_number == IODA_INVALID_PE)) + if (WARN_ON(!pe)) return false; - pe = &phb->ioda.pe_array[pdn->pe_number]; bypass = pnv_ioda_pe_iommu_bypass_supported(pe, dma_mask); /* @@ -1852,7 +1848,7 @@ static bool pnv_pci_ioda_iommu_bypass_supported(struct pci_dev *pdev, dma_mask > (memory_hotplug_max() + (1ULL << 32)) && /* pe->pdev should be set if it's a single device, pe->pbus if not */ (pe->device_count == 1 || !pe->pbus) && - phb->model == PNV_PHB_MODEL_PHB3) { + pe->phb->model == PNV_PHB_MODEL_PHB3) { /* Configure the bypass mode */ if (pnv_pci_ioda_dma_64bit_bypass(pe)) return false; From patchwork Wed Oct 30 16:59:58 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Reza Arbab X-Patchwork-Id: 1186872 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 473FdV6q7Hz9sNw for ; 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Wed, 30 Oct 2019 17:00:04 +0000 Received: from b03ledav004.gho.boulder.ibm.com (b03ledav004.gho.boulder.ibm.com [9.17.130.235]) by b03cxnp08025.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x9UH03vA61014364 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 30 Oct 2019 17:00:03 GMT Received: from b03ledav004.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C7ABD78085; Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: from b03ledav004.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B739E78079; Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: from arbab-laptop.localdomain (unknown [9.53.179.210]) by b03ledav004.gho.boulder.ibm.com (Postfix) with ESMTP; Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: by arbab-laptop.localdomain (Postfix, from userid 152845) id 71B7E4654AF; Wed, 30 Oct 2019 12:00:00 -0500 (CDT) From: Reza Arbab To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH 09/11] Revert "powerpc/pci: remove the dma_set_mask pci_controller ops methods" Date: Wed, 30 Oct 2019 11:59:58 -0500 Message-Id: <1572454800-17976-10-git-send-email-arbab@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1572454800-17976-1-git-send-email-arbab@linux.ibm.com> References: <1572454800-17976-1-git-send-email-arbab@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-10-30_07:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1910300150 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Andrew Donnellan , Alexey Kardashevskiy , Oliver O'Halloran , Alistair Popple , Paul Mackerras , Thomas Gleixner , Christoph Hellwig Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Bring back the pci controller based hook in dma_set_mask(), as it will have a user again. This reverts commit 662acad4067a ("powerpc/pci: remove the dma_set_mask pci_controller ops methods"). The callback signature has been adjusted with void return to fit its caller. Signed-off-by: Reza Arbab Cc: Christoph Hellwig --- arch/powerpc/include/asm/pci-bridge.h | 2 ++ arch/powerpc/kernel/dma-mask.c | 9 +++++++++ 2 files changed, 11 insertions(+) diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h index ea6ec65970ef..8512dcd053c5 100644 --- a/arch/powerpc/include/asm/pci-bridge.h +++ b/arch/powerpc/include/asm/pci-bridge.h @@ -43,6 +43,8 @@ struct pci_controller_ops { void (*teardown_msi_irqs)(struct pci_dev *pdev); #endif + void (*dma_set_mask)(struct pci_dev *pdev, u64 dma_mask); + void (*shutdown)(struct pci_controller *hose); }; diff --git a/arch/powerpc/kernel/dma-mask.c b/arch/powerpc/kernel/dma-mask.c index ffbbbc432612..35b5fd1b03a6 100644 --- a/arch/powerpc/kernel/dma-mask.c +++ b/arch/powerpc/kernel/dma-mask.c @@ -2,11 +2,20 @@ #include #include +#include #include void arch_dma_set_mask(struct device *dev, u64 dma_mask) { if (ppc_md.dma_set_mask) ppc_md.dma_set_mask(dev, dma_mask); + + if (dev_is_pci(dev)) { + struct pci_dev *pdev = to_pci_dev(dev); + struct pci_controller *phb = pci_bus_to_host(pdev->bus); + + if (phb->controller_ops.dma_set_mask) + phb->controller_ops.dma_set_mask(pdev, dma_mask); + } } EXPORT_SYMBOL(arch_dma_set_mask); From patchwork Wed Oct 30 16:59:59 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Reza Arbab X-Patchwork-Id: 1186869 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 473FXD4LXyz9sPL for ; Thu, 31 Oct 2019 04:18:04 +1100 (AEDT) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 473FXD2SWczF4WC for ; 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Wed, 30 Oct 2019 17:00:03 GMT Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B3D92136055; Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A5A85136066; Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: from arbab-laptop.localdomain (unknown [9.53.179.210]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTP; Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: by arbab-laptop.localdomain (Postfix, from userid 152845) id 774B24654B0; Wed, 30 Oct 2019 12:00:00 -0500 (CDT) From: Reza Arbab To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH 10/11] powerpc/powernv: Add pnv_phb3_iommu_bypass_supported() Date: Wed, 30 Oct 2019 11:59:59 -0500 Message-Id: <1572454800-17976-11-git-send-email-arbab@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1572454800-17976-1-git-send-email-arbab@linux.ibm.com> References: <1572454800-17976-1-git-send-email-arbab@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-10-30_07:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1910300150 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Andrew Donnellan , Alexey Kardashevskiy , Oliver O'Halloran , Alistair Popple , Paul Mackerras , Thomas Gleixner , Christoph Hellwig Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Move this code to its own function for reuse. As a side benefit, rearrange the comments and spread things out for readability. Signed-off-by: Reza Arbab --- arch/powerpc/platforms/powernv/pci-ioda.c | 37 +++++++++++++++++++++---------- 1 file changed, 25 insertions(+), 12 deletions(-) diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index 6b932cfc0deb..57e6a43d9a3a 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -1826,6 +1826,30 @@ static int pnv_pci_ioda_dma_64bit_bypass(struct pnv_ioda_pe *pe) return -EIO; } +/* + * If the device can't set the TCE bypass bit but still wants + * to access 4GB or more, on PHB3 we can reconfigure TVE#0 to + * bypass the 32-bit region and be usable for 64-bit DMAs. + */ +static bool pnv_phb3_iommu_bypass_supported(struct pnv_ioda_pe *pe, u64 mask) +{ + if (pe->phb->model != PNV_PHB_MODEL_PHB3) + return false; + + /* pe->pdev should be set if it's a single device, pe->pbus if not */ + if (pe->pbus && pe->device_count != 1) + return false; + + if (!(mask >> 32)) + return false; + + /* The device needs to be able to address all of this space. */ + if (mask <= memory_hotplug_max() + (1ULL << 32)) + return false; + + return true; +} + static bool pnv_pci_ioda_iommu_bypass_supported(struct pci_dev *pdev, u64 dma_mask) { @@ -1837,18 +1861,7 @@ static bool pnv_pci_ioda_iommu_bypass_supported(struct pci_dev *pdev, bypass = pnv_ioda_pe_iommu_bypass_supported(pe, dma_mask); - /* - * If the device can't set the TCE bypass bit but still wants - * to access 4GB or more, on PHB3 we can reconfigure TVE#0 to - * bypass the 32-bit region and be usable for 64-bit DMAs. - * The device needs to be able to address all of this space. - */ - if (!bypass && - dma_mask >> 32 && - dma_mask > (memory_hotplug_max() + (1ULL << 32)) && - /* pe->pdev should be set if it's a single device, pe->pbus if not */ - (pe->device_count == 1 || !pe->pbus) && - pe->phb->model == PNV_PHB_MODEL_PHB3) { + if (!bypass && pnv_phb3_iommu_bypass_supported(pe, dma_mask)) { /* Configure the bypass mode */ if (pnv_pci_ioda_dma_64bit_bypass(pe)) return false; 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Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: from b03ledav004.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B4AB678077; Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: from arbab-laptop.localdomain (unknown [9.53.179.210]) by b03ledav004.gho.boulder.ibm.com (Postfix) with ESMTP; Wed, 30 Oct 2019 17:00:01 +0000 (GMT) Received: by arbab-laptop.localdomain (Postfix, from userid 152845) id 7C2734654B1; Wed, 30 Oct 2019 12:00:00 -0500 (CDT) From: Reza Arbab To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH 11/11] powerpc/powernv: Add pnv_pci_ioda_dma_set_mask() Date: Wed, 30 Oct 2019 12:00:00 -0500 Message-Id: <1572454800-17976-12-git-send-email-arbab@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1572454800-17976-1-git-send-email-arbab@linux.ibm.com> References: <1572454800-17976-1-git-send-email-arbab@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-10-30_07:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1910300150 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Andrew Donnellan , Alexey Kardashevskiy , Oliver O'Halloran , Alistair Popple , Paul Mackerras , Thomas Gleixner , Christoph Hellwig Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Change pnv_pci_ioda_iommu_bypass_supported() to have no side effects, by separating the part of the function that determines if bypass is supported from the part that actually attempts to configure it. Move the latter to a controller-specific dma_set_mask() callback. Signed-off-by: Reza Arbab --- arch/powerpc/platforms/powernv/Kconfig | 1 + arch/powerpc/platforms/powernv/pci-ioda.c | 30 ++++++++++++++++-------------- 2 files changed, 17 insertions(+), 14 deletions(-) diff --git a/arch/powerpc/platforms/powernv/Kconfig b/arch/powerpc/platforms/powernv/Kconfig index 938803eab0ad..6e6e27841764 100644 --- a/arch/powerpc/platforms/powernv/Kconfig +++ b/arch/powerpc/platforms/powernv/Kconfig @@ -17,6 +17,7 @@ config PPC_POWERNV select PPC_DOORBELL select MMU_NOTIFIER select FORCE_SMP + select ARCH_HAS_DMA_SET_MASK default y config OPAL_PRD diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index 57e6a43d9a3a..5291464930ed 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -1854,32 +1854,33 @@ static bool pnv_pci_ioda_iommu_bypass_supported(struct pci_dev *pdev, u64 dma_mask) { struct pnv_ioda_pe *pe = pnv_ioda_get_pe(pdev); - bool bypass; if (WARN_ON(!pe)) return false; - bypass = pnv_ioda_pe_iommu_bypass_supported(pe, dma_mask); + return pnv_ioda_pe_iommu_bypass_supported(pe, dma_mask) || + pnv_phb3_iommu_bypass_supported(pe, dma_mask); +} + +static void pnv_pci_ioda_dma_set_mask(struct pci_dev *pdev, u64 mask) +{ + struct pnv_ioda_pe *pe = pnv_ioda_get_pe(pdev); + + if (!pe) + return; - if (!bypass && pnv_phb3_iommu_bypass_supported(pe, dma_mask)) { + if (!pnv_ioda_pe_iommu_bypass_supported(pe, mask) && + pnv_phb3_iommu_bypass_supported(pe, mask)) { /* Configure the bypass mode */ if (pnv_pci_ioda_dma_64bit_bypass(pe)) - return false; + return; /* 4GB offset bypasses 32-bit space */ pdev->dev.archdata.dma_offset = (1ULL << 32); - - bypass = true; } - /* - * Update peer npu devices. We also do this for the special case where - * a 64-bit dma mask can't be fulfilled and falls back to default. - */ - if (bypass || !(dma_mask >> 32) || dma_mask == DMA_BIT_MASK(64)) - pnv_npu_try_dma_set_bypass(pdev, dma_mask); - - return bypass; + /* Update peer npu devices */ + pnv_npu_try_dma_set_bypass(pdev, mask); } static void pnv_ioda_setup_bus_dma(struct pnv_ioda_pe *pe, struct pci_bus *bus) @@ -3612,6 +3613,7 @@ static void pnv_pci_ioda_shutdown(struct pci_controller *hose) static const struct pci_controller_ops pnv_pci_ioda_controller_ops = { .dma_dev_setup = pnv_pci_dma_dev_setup, .dma_bus_setup = pnv_pci_dma_bus_setup, + .dma_set_mask = pnv_pci_ioda_dma_set_mask, .iommu_bypass_supported = pnv_pci_ioda_iommu_bypass_supported, .setup_msi_irqs = pnv_setup_msi_irqs, .teardown_msi_irqs = pnv_teardown_msi_irqs,