From: Vikas Gupta <vikas.gupta@broadcom.com>
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 <vikas.gupta@broadcom.com>
Subject: [RFC v4 3/3] vfio: platform: reset: add msi support
Date: Fri, 29 Jan 2021 22:54:21 +0530 [thread overview]
Message-ID: <20210129172421.43299-4-vikas.gupta@broadcom.com> (raw)
In-Reply-To: <20210129172421.43299-1-vikas.gupta@broadcom.com>
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Add msi support for Broadcom FlexRm device.
Signed-off-by: Vikas Gupta <vikas.gupta@broadcom.com>
---
.../platform/reset/vfio_platform_bcmflexrm.c | 72 ++++++++++++++++++-
1 file changed, 70 insertions(+), 2 deletions(-)
diff --git a/drivers/vfio/platform/reset/vfio_platform_bcmflexrm.c b/drivers/vfio/platform/reset/vfio_platform_bcmflexrm.c
index 96064ef8f629..6ca4ca12575b 100644
--- a/drivers/vfio/platform/reset/vfio_platform_bcmflexrm.c
+++ b/drivers/vfio/platform/reset/vfio_platform_bcmflexrm.c
@@ -21,7 +21,9 @@
#include <linux/init.h>
#include <linux/io.h>
#include <linux/kernel.h>
+#include <linux/msi.h>
#include <linux/module.h>
+#include <linux/vfio.h>
#include "../vfio_platform_private.h"
@@ -33,6 +35,9 @@
#define RING_VER 0x000
#define RING_CONTROL 0x034
#define RING_FLUSH_DONE 0x038
+#define RING_MSI_ADDR_LS 0x03c
+#define RING_MSI_ADDR_MS 0x040
+#define RING_MSI_DATA_VALUE 0x064
/* Register RING_CONTROL fields */
#define CONTROL_FLUSH_SHIFT 5
@@ -105,8 +110,71 @@ static int vfio_platform_bcmflexrm_reset(struct vfio_platform_device *vdev)
return ret;
}
-module_vfio_reset_handler("brcm,iproc-flexrm-mbox",
- vfio_platform_bcmflexrm_reset);
+static u32 bcm_num_msi(struct vfio_platform_device *vdev)
+{
+ struct vfio_platform_region *reg = &vdev->regions[0];
+
+ return (reg->size / RING_REGS_SIZE);
+}
+
+static void bcm_write_msi(struct vfio_platform_device *vdev,
+ struct msi_desc *desc,
+ struct msi_msg *msg)
+{
+ int i;
+ int hwirq = -1;
+ int msi_src;
+ void __iomem *ring;
+ struct vfio_platform_region *reg = &vdev->regions[0];
+
+ if (!reg)
+ return;
+
+ for (i = 0; i < vdev->num_irqs; i++)
+ if (vdev->irqs[i].type == VFIO_IRQ_TYPE_MSI)
+ hwirq = vdev->irqs[i].ctx[0].hwirq;
+
+ if (hwirq < 0)
+ return;
+
+ msi_src = desc->irq - hwirq;
+
+ if (!reg->ioaddr) {
+ reg->ioaddr = ioremap(reg->addr, reg->size);
+ if (!reg->ioaddr)
+ return;
+ }
+
+ ring = reg->ioaddr + msi_src * RING_REGS_SIZE;
+
+ writel_relaxed(msg->address_lo, ring + RING_MSI_ADDR_LS);
+ writel_relaxed(msg->address_hi, ring + RING_MSI_ADDR_MS);
+ writel_relaxed(msg->data, ring + RING_MSI_DATA_VALUE);
+}
+
+static struct vfio_platform_reset_node vfio_platform_bcmflexrm_reset_node = {
+ .owner = THIS_MODULE,
+ .compat = "brcm,iproc-flexrm-mbox",
+ .of_reset = vfio_platform_bcmflexrm_reset,
+ .of_get_msi = bcm_num_msi,
+ .of_msi_write = bcm_write_msi
+};
+
+static int __init vfio_platform_bcmflexrm_reset_module_init(void)
+{
+ __vfio_platform_register_reset(&vfio_platform_bcmflexrm_reset_node);
+
+ return 0;
+}
+
+static void __exit vfio_platform_bcmflexrm_reset_module_exit(void)
+{
+ vfio_platform_unregister_reset("brcm,iproc-flexrm-mbox",
+ vfio_platform_bcmflexrm_reset);
+}
+
+module_init(vfio_platform_bcmflexrm_reset_module_init);
+module_exit(vfio_platform_bcmflexrm_reset_module_exit);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Anup Patel <anup.patel@broadcom.com>");
--
2.17.1
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next prev parent reply other threads:[~2021-01-29 17:29 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-05 6:02 [RFC, v0 0/3] msi support for platform devices Vikas Gupta
2020-11-05 6:02 ` [RFC, v0 1/3] vfio/platform: add support for msi Vikas Gupta
2020-11-05 7:08 ` Alex Williamson
2020-11-06 2:54 ` Vikas Gupta
2020-11-06 3:12 ` Alex Williamson
2020-11-09 6:41 ` Vikas Gupta
2020-11-09 15:18 ` Auger Eric
2020-11-09 15:28 ` Alex Williamson
2020-11-10 11:06 ` Vikas Gupta
2020-11-09 15:05 ` Auger Eric
2020-11-10 11:01 ` Vikas Gupta
2020-11-05 6:02 ` [RFC, v0 2/3] vfio/platform: change cleanup order Vikas Gupta
2020-11-05 6:02 ` [RFC, v0 3/3] vfio/platform: add Broadcom msi module Vikas Gupta
2020-11-12 17:58 ` [RFC, v1 0/3] msi support for platform devices Vikas Gupta
2020-11-12 17:58 ` [RFC v1 1/3] vfio/platform: add support for msi Vikas Gupta
2020-11-12 17:58 ` [RFC v1 2/3] vfio/platform: change cleanup order Vikas Gupta
2020-11-12 17:58 ` [RFC v1 3/3] vfio/platform: add Broadcom msi module Vikas Gupta
2020-11-12 18:40 ` [RFC, v1 0/3] msi support for platform devices Auger Eric
2020-11-13 17:24 ` Vikas Gupta
2020-11-16 13:14 ` Auger Eric
2020-11-17 6:25 ` Vikas Gupta
2020-11-17 8:05 ` Auger Eric
2020-11-17 8:25 ` Auger Eric
2020-11-17 16:36 ` Vikas Gupta
2020-11-18 11:00 ` Auger Eric
2020-11-24 16:16 ` [RFC, v2 0/1] " Vikas Gupta
2020-11-24 16:16 ` [RFC v2 1/1] vfio/platform: add support for msi Vikas Gupta
2020-12-02 14:44 ` Auger Eric
2020-12-03 14:50 ` Vikas Gupta
2020-12-07 20:43 ` Auger Eric
2020-12-10 7:34 ` Vikas Gupta
2020-12-11 8:40 ` Auger Eric
2020-12-02 14:43 ` [RFC, v2 0/1] msi support for platform devices Auger Eric
2020-12-03 14:39 ` Vikas Gupta
2020-12-14 17:45 ` [RFC, v3 0/2] " Vikas Gupta
2020-12-14 17:45 ` [RFC v3 1/2] vfio/platform: add support for msi Vikas Gupta
2020-12-22 17:27 ` Auger Eric
2021-01-05 5:53 ` Vikas Gupta
2021-01-12 9:00 ` Auger Eric
2021-01-15 6:26 ` Vikas Gupta
2021-01-15 9:25 ` Auger Eric
2020-12-14 17:45 ` [RFC v3 2/2] vfio/platform: msi: add Broadcom platform devices Vikas Gupta
2021-01-12 9:22 ` Auger Eric
2021-01-15 6:35 ` Vikas Gupta
2021-01-15 9:24 ` Auger Eric
2021-01-19 22:45 ` Alex Williamson
2021-01-20 10:22 ` Auger Eric
2021-01-29 17:24 ` [RFC v4 0/3] msi support for " Vikas Gupta
2021-01-29 17:24 ` [RFC v4 1/3] vfio/platform: add support for msi Vikas Gupta
2021-02-08 13:30 ` Auger Eric
2021-01-29 17:24 ` [RFC v4 2/3] vfio/platform: change cleanup order Vikas Gupta
2021-02-08 13:31 ` Auger Eric
2021-01-29 17:24 ` Vikas Gupta [this message]
2021-02-08 15:27 ` [RFC v4 3/3] vfio: platform: reset: add msi support Auger Eric
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