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Mon, 14 Dec 2020 09:45:38 -0800 (PST) Received: from rahul_yocto_ubuntu18.ibn.broadcom.net ([192.19.234.250]) by smtp.gmail.com with ESMTPSA id m8sm6658131pgg.78.2020.12.14.09.45.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Dec 2020 09:45:37 -0800 (PST) From: Vikas Gupta To: eric.auger@redhat.com, alex.williamson@redhat.com, cohuck@redhat.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: vikram.prakash@broadcom.com, srinath.mannam@broadcom.com, ashwin.kamath@broadcom.com, zachary.schroff@broadcom.com, manish.kurup@broadcom.com, Vikas Gupta Subject: [RFC v3 2/2] vfio/platform: msi: add Broadcom platform devices Date: Mon, 14 Dec 2020 23:15:14 +0530 Message-Id: <20201214174514.22006-3-vikas.gupta@broadcom.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201214174514.22006-1-vikas.gupta@broadcom.com> References: <20201124161646.41191-1-vikas.gupta@broadcom.com> <20201214174514.22006-1-vikas.gupta@broadcom.com> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="000000000000ca9cc205b67035ed" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --000000000000ca9cc205b67035ed Content-Type: text/plain; charset="US-ASCII" Add msi support for Broadcom platform devices Signed-off-by: Vikas Gupta --- drivers/vfio/platform/Kconfig | 1 + drivers/vfio/platform/Makefile | 1 + drivers/vfio/platform/msi/Kconfig | 9 ++++ drivers/vfio/platform/msi/Makefile | 2 + .../vfio/platform/msi/vfio_platform_bcmplt.c | 49 +++++++++++++++++++ 5 files changed, 62 insertions(+) create mode 100644 drivers/vfio/platform/msi/Kconfig create mode 100644 drivers/vfio/platform/msi/Makefile create mode 100644 drivers/vfio/platform/msi/vfio_platform_bcmplt.c diff --git a/drivers/vfio/platform/Kconfig b/drivers/vfio/platform/Kconfig index dc1a3c44f2c6..7b8696febe61 100644 --- a/drivers/vfio/platform/Kconfig +++ b/drivers/vfio/platform/Kconfig @@ -21,3 +21,4 @@ config VFIO_AMBA If you don't know what to do here, say N. source "drivers/vfio/platform/reset/Kconfig" +source "drivers/vfio/platform/msi/Kconfig" diff --git a/drivers/vfio/platform/Makefile b/drivers/vfio/platform/Makefile index 3f3a24e7c4ef..9ccdcdbf0e7e 100644 --- a/drivers/vfio/platform/Makefile +++ b/drivers/vfio/platform/Makefile @@ -5,6 +5,7 @@ vfio-platform-y := vfio_platform.o obj-$(CONFIG_VFIO_PLATFORM) += vfio-platform.o obj-$(CONFIG_VFIO_PLATFORM) += vfio-platform-base.o obj-$(CONFIG_VFIO_PLATFORM) += reset/ +obj-$(CONFIG_VFIO_PLATFORM) += msi/ vfio-amba-y := vfio_amba.o diff --git a/drivers/vfio/platform/msi/Kconfig b/drivers/vfio/platform/msi/Kconfig new file mode 100644 index 000000000000..54d6b70e1e32 --- /dev/null +++ b/drivers/vfio/platform/msi/Kconfig @@ -0,0 +1,9 @@ +# SPDX-License-Identifier: GPL-2.0-only +config VFIO_PLATFORM_BCMPLT_MSI + tristate "MSI support for Broadcom platform devices" + depends on VFIO_PLATFORM && (ARCH_BCM_IPROC || COMPILE_TEST) + default ARCH_BCM_IPROC + help + Enables the VFIO platform driver to handle msi for Broadcom devices + + If you don't know what to do here, say N. diff --git a/drivers/vfio/platform/msi/Makefile b/drivers/vfio/platform/msi/Makefile new file mode 100644 index 000000000000..27422d45cecb --- /dev/null +++ b/drivers/vfio/platform/msi/Makefile @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_VFIO_PLATFORM_BCMPLT_MSI) += vfio_platform_bcmplt.o diff --git a/drivers/vfio/platform/msi/vfio_platform_bcmplt.c b/drivers/vfio/platform/msi/vfio_platform_bcmplt.c new file mode 100644 index 000000000000..a074b5e92d77 --- /dev/null +++ b/drivers/vfio/platform/msi/vfio_platform_bcmplt.c @@ -0,0 +1,49 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2020 Broadcom. + */ + +#include +#include +#include +#include +#include + +#include "../vfio_platform_private.h" + +#define RING_SIZE (64 << 10) + +#define RING_MSI_ADDR_LS 0x03c +#define RING_MSI_ADDR_MS 0x040 +#define RING_MSI_DATA_VALUE 0x064 + +static u32 bcm_num_msi(struct vfio_platform_device *vdev) +{ + struct vfio_platform_region *reg = &vdev->regions[0]; + + return (reg->size / RING_SIZE); +} + +static struct vfio_platform_msi_node vfio_platform_bcmflexrm_msi_node = { + .owner = THIS_MODULE, + .compat = "brcm,iproc-flexrm-mbox", + .of_get_msi = bcm_num_msi, +}; + +static int __init vfio_platform_bcmflexrm_msi_module_init(void) +{ + __vfio_platform_register_msi(&vfio_platform_bcmflexrm_msi_node); + + return 0; +} + +static void __exit vfio_platform_bcmflexrm_msi_module_exit(void) +{ + vfio_platform_unregister_msi("brcm,iproc-flexrm-mbox"); +} + +module_init(vfio_platform_bcmflexrm_msi_module_init); +module_exit(vfio_platform_bcmflexrm_msi_module_exit); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Broadcom"); -- 2.17.1 -- This electronic communication and the information and any files transmitted with it, or attached to it, are confidential and are intended solely for the use of the individual or entity to whom it is addressed and may contain information that is confidential, legally privileged, protected by privacy laws, or otherwise restricted from disclosure to anyone else. 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