Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933685AbcJLNYE (ORCPT ); Wed, 12 Oct 2016 09:24:04 -0400 Received: from mx1.redhat.com ([209.132.183.28]:39560 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933583AbcJLNXG (ORCPT ); Wed, 12 Oct 2016 09:23:06 -0400 From: Eric Auger To: eric.auger@redhat.com, eric.auger.pro@gmail.com, christoffer.dall@linaro.org, marc.zyngier@arm.com, robin.murphy@arm.com, alex.williamson@redhat.com, will.deacon@arm.com, joro@8bytes.org, tglx@linutronix.de, jason@lakedaemon.net, linux-arm-kernel@lists.infradead.org Cc: kvm@vger.kernel.org, drjones@redhat.com, linux-kernel@vger.kernel.org, Bharat.Bhushan@freescale.com, pranav.sawargaonkar@gmail.com, p.fedin@samsung.com, iommu@lists.linux-foundation.org, Jean-Philippe.Brucker@arm.com, yehuday@marvell.com, Manish.Jaggi@caviumnetworks.com Subject: [PATCH v14 07/16] irqchip/gic-v2m: Register the MSI doorbell Date: Wed, 12 Oct 2016 13:22:15 +0000 Message-Id: <1476278544-3397-8-git-send-email-eric.auger@redhat.com> In-Reply-To: <1476278544-3397-1-git-send-email-eric.auger@redhat.com> References: <1476278544-3397-1-git-send-email-eric.auger@redhat.com> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Wed, 12 Oct 2016 13:23:05 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2190 Lines: 81 Register the GIC V2M global doorbell. The registered information are used to set up the KVM passthrough use case. Signed-off-by: Eric Auger --- v13 -> v14: - use iommu_msi_doorbell_alloc/free v12 -> v13: - use new msi doorbell registration prototype - remove iommu protection attributes - add unregistration in teardown v11 -> v12: - use irq_get_msi_doorbell_info new name - simplify error handling v10 -> v11: - use the new registration API and re-implement the msi_doorbell_info ops v9 -> v10: - introduce the registration concept in place of msi_doorbell_info callback v8 -> v9: - use global_doorbell instead of percpu_doorbells v7 -> v8: - gicv2m_msi_doorbell_info does not return a pointer to const - remove spurious !v2m check - add IOMMU_MMIO flag v7: creation --- drivers/irqchip/irq-gic-v2m.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/irqchip/irq-gic-v2m.c b/drivers/irqchip/irq-gic-v2m.c index 863e073..33acfe0 100644 --- a/drivers/irqchip/irq-gic-v2m.c +++ b/drivers/irqchip/irq-gic-v2m.c @@ -70,6 +70,7 @@ struct v2m_data { u32 spi_offset; /* offset to be subtracted from SPI number */ unsigned long *bm; /* MSI vector bitmap */ u32 flags; /* v2m flags for specific implementation */ + struct iommu_msi_doorbell_info *doorbell_info; /* MSI doorbell */ }; static void gicv2m_mask_msi_irq(struct irq_data *d) @@ -254,6 +255,7 @@ static void gicv2m_teardown(void) struct v2m_data *v2m, *tmp; list_for_each_entry_safe(v2m, tmp, &v2m_nodes, entry) { + iommu_msi_doorbell_free(v2m->doorbell_info); list_del(&v2m->entry); kfree(v2m->bm); iounmap(v2m->base); @@ -370,12 +372,18 @@ static int __init gicv2m_init_one(struct fwnode_handle *fwnode, goto err_iounmap; } + v2m->doorbell_info = iommu_msi_doorbell_alloc(v2m->res.start, + sizeof(u32), false); + if (IS_ERR(v2m->doorbell_info)) + goto err_free_bm; + list_add_tail(&v2m->entry, &v2m_nodes); pr_info("range%pR, SPI[%d:%d]\n", res, v2m->spi_start, (v2m->spi_start + v2m->nr_spis - 1)); return 0; - +err_free_bm: + kfree(v2m->bm); err_iounmap: iounmap(v2m->base); err_free_v2m: -- 1.9.1