From: Nipun Gupta <nipun.gupta@amd.com>
To: <dev@dpdk.org>, <thomas@monjalon.net>,
<david.marchand@redhat.com>, <hkalra@marvell.com>,
<anatoly.burakov@intel.com>, <stephen@networkplumber.org>
Cc: <ferruh.yigit@amd.com>, <harpreet.anand@amd.com>,
<nikhil.agarwal@amd.com>, Nipun Gupta <nipun.gupta@amd.com>
Subject: [PATCH v6 3/4] bus/cdx: add support for MSI
Date: Mon, 5 Jun 2023 18:56:23 +0530 [thread overview]
Message-ID: <20230605132624.8626-4-nipun.gupta@amd.com> (raw)
In-Reply-To: <20230605132624.8626-1-nipun.gupta@amd.com>
MSI's are exposed to the devices using VFIO (vfio-cdx). This
patch uses the same to add support for MSI for the devices on
the cdx bus.
Signed-off-by: Nipun Gupta <nipun.gupta@amd.com>
Acked-by: Ferruh Yigit <ferruh.yigit@amd.com>
---
drivers/bus/cdx/bus_cdx_driver.h | 25 +++++
drivers/bus/cdx/cdx.c | 11 ++
drivers/bus/cdx/cdx_vfio.c | 176 ++++++++++++++++++++++++++++++-
drivers/bus/cdx/version.map | 2 +
4 files changed, 212 insertions(+), 2 deletions(-)
diff --git a/drivers/bus/cdx/bus_cdx_driver.h b/drivers/bus/cdx/bus_cdx_driver.h
index dbbd1bbdf2..5745429fa7 100644
--- a/drivers/bus/cdx/bus_cdx_driver.h
+++ b/drivers/bus/cdx/bus_cdx_driver.h
@@ -56,6 +56,7 @@ struct rte_cdx_device {
struct rte_cdx_id id; /**< CDX ID. */
struct rte_mem_resource mem_resource[CDX_MAX_RESOURCE];
/**< CDX Memory Resource */
+ struct rte_intr_handle *intr_handle; /**< Interrupt handle */
};
/**
@@ -147,6 +148,30 @@ void rte_cdx_unmap_device(struct rte_cdx_device *dev);
__rte_internal
void rte_cdx_register(struct rte_cdx_driver *driver);
+/**
+ * Enables VFIO Interrupts for CDX bus devices.
+ *
+ * @param intr_handle
+ * Pointer to the interrupt handle.
+ *
+ * @return
+ * 0 on success, -1 on error.
+ */
+__rte_internal
+int rte_cdx_vfio_intr_enable(const struct rte_intr_handle *intr_handle);
+
+/**
+ * Disable VFIO Interrupts for CDX bus devices.
+ *
+ * @param intr_handle
+ * Pointer to the interrupt handle.
+ *
+ * @return
+ * 0 on success, -1 on error.
+ */
+__rte_internal
+int rte_cdx_vfio_intr_disable(const struct rte_intr_handle *intr_handle);
+
/**
* Helper for CDX device registration from driver (eth, crypto, raw) instance
*/
diff --git a/drivers/bus/cdx/cdx.c b/drivers/bus/cdx/cdx.c
index 9ad8f73424..e5e6a665c3 100644
--- a/drivers/bus/cdx/cdx.c
+++ b/drivers/bus/cdx/cdx.c
@@ -202,6 +202,15 @@ cdx_scan_one(const char *dirname, const char *dev_name)
goto err;
}
+ /* Allocate interrupt instance for cdx device */
+ dev->intr_handle =
+ rte_intr_instance_alloc(RTE_INTR_INSTANCE_F_PRIVATE);
+ if (dev->intr_handle == NULL) {
+ CDX_BUS_ERR("Failed to create interrupt instance for %s",
+ dev->device.name);
+ return -ENOMEM;
+ }
+
/*
* Check if device is bound to 'vfio-cdx' driver, so that user-space
* can gracefully access the device.
@@ -380,6 +389,8 @@ cdx_probe_one_driver(struct rte_cdx_driver *dr,
return ret;
error_probe:
+ rte_intr_instance_free(dev->intr_handle);
+ dev->intr_handle = NULL;
cdx_vfio_unmap_resource(dev);
error_map_device:
return ret;
diff --git a/drivers/bus/cdx/cdx_vfio.c b/drivers/bus/cdx/cdx_vfio.c
index c545bcd9f5..e8ccf7fb94 100644
--- a/drivers/bus/cdx/cdx_vfio.c
+++ b/drivers/bus/cdx/cdx_vfio.c
@@ -51,6 +51,10 @@ struct mapped_cdx_resource {
/** mapped cdx device list */
TAILQ_HEAD(mapped_cdx_res_list, mapped_cdx_resource);
+/* IRQ set buffer length for MSI interrupts */
+#define MSI_IRQ_SET_BUF_LEN (sizeof(struct vfio_irq_set) + \
+ sizeof(int) * (RTE_MAX_RXTX_INTR_VEC_ID + 1))
+
static struct rte_tailq_elem cdx_vfio_tailq = {
.name = "VFIO_CDX_RESOURCE_LIST",
};
@@ -95,6 +99,27 @@ cdx_vfio_unmap_resource_primary(struct rte_cdx_device *dev)
char cdx_addr[PATH_MAX] = {0};
struct mapped_cdx_resource *vfio_res = NULL;
struct mapped_cdx_res_list *vfio_res_list;
+ int ret, vfio_dev_fd;
+
+ if (rte_intr_fd_get(dev->intr_handle) < 0)
+ return -1;
+
+ if (close(rte_intr_fd_get(dev->intr_handle)) < 0) {
+ CDX_BUS_ERR("Error when closing eventfd file descriptor for %s",
+ dev->device.name);
+ return -1;
+ }
+
+ vfio_dev_fd = rte_intr_dev_fd_get(dev->intr_handle);
+ if (vfio_dev_fd < 0)
+ return -1;
+
+ ret = rte_vfio_release_device(CDX_BUS_DEVICES_PATH, dev->device.name,
+ vfio_dev_fd);
+ if (ret < 0) {
+ CDX_BUS_ERR("Cannot release VFIO device");
+ return ret;
+ }
vfio_res_list =
RTE_TAILQ_CAST(cdx_vfio_tailq.head, mapped_cdx_res_list);
@@ -117,6 +142,18 @@ cdx_vfio_unmap_resource_secondary(struct rte_cdx_device *dev)
{
struct mapped_cdx_resource *vfio_res = NULL;
struct mapped_cdx_res_list *vfio_res_list;
+ int ret, vfio_dev_fd;
+
+ vfio_dev_fd = rte_intr_dev_fd_get(dev->intr_handle);
+ if (vfio_dev_fd < 0)
+ return -1;
+
+ ret = rte_vfio_release_device(CDX_BUS_DEVICES_PATH, dev->device.name,
+ vfio_dev_fd);
+ if (ret < 0) {
+ CDX_BUS_ERR("Cannot release VFIO device");
+ return ret;
+ }
vfio_res_list =
RTE_TAILQ_CAST(cdx_vfio_tailq.head, mapped_cdx_res_list);
@@ -141,9 +178,74 @@ cdx_vfio_unmap_resource(struct rte_cdx_device *dev)
return cdx_vfio_unmap_resource_secondary(dev);
}
+/* set up interrupt support (but not enable interrupts) */
static int
-cdx_rte_vfio_setup_device(int vfio_dev_fd)
+cdx_vfio_setup_interrupts(struct rte_cdx_device *dev, int vfio_dev_fd,
+ int num_irqs)
{
+ int i, ret;
+
+ if (num_irqs == 0)
+ return 0;
+
+ /* start from MSI interrupt type */
+ for (i = 0; i < num_irqs; i++) {
+ struct vfio_irq_info irq = { .argsz = sizeof(irq) };
+ int fd = -1;
+
+ irq.index = i;
+
+ ret = ioctl(vfio_dev_fd, VFIO_DEVICE_GET_IRQ_INFO, &irq);
+ if (ret < 0) {
+ CDX_BUS_ERR("Cannot get VFIO IRQ info, error %i (%s)",
+ errno, strerror(errno));
+ return -1;
+ }
+
+ /* if this vector cannot be used with eventfd, fail if we explicitly
+ * specified interrupt type, otherwise continue
+ */
+ if ((irq.flags & VFIO_IRQ_INFO_EVENTFD) == 0)
+ continue;
+
+ /* Set nb_intr to the total number of interrupts */
+ if (rte_intr_event_list_update(dev->intr_handle, irq.count))
+ return -1;
+
+ /* set up an eventfd for interrupts */
+ fd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
+ if (fd < 0) {
+ CDX_BUS_ERR("Cannot set up eventfd, error %i (%s)",
+ errno, strerror(errno));
+ return -1;
+ }
+
+ if (rte_intr_fd_set(dev->intr_handle, fd))
+ return -1;
+
+ /* DPDK CDX bus currently supports only MSI-X */
+ if (rte_intr_type_set(dev->intr_handle, RTE_INTR_HANDLE_VFIO_MSIX))
+ return -1;
+
+ if (rte_intr_dev_fd_set(dev->intr_handle, vfio_dev_fd))
+ return -1;
+
+ return 0;
+ }
+
+ /* if we're here, we haven't found a suitable interrupt vector */
+ return -1;
+}
+
+static int
+cdx_vfio_setup_device(struct rte_cdx_device *dev, int vfio_dev_fd,
+ int num_irqs)
+{
+ if (cdx_vfio_setup_interrupts(dev, vfio_dev_fd, num_irqs) != 0) {
+ CDX_BUS_ERR("Error setting up interrupts!");
+ return -1;
+ }
+
/*
* Reset the device. If the device is not capable of resetting,
* then it updates errno as EINVAL.
@@ -279,6 +381,9 @@ cdx_vfio_map_resource_primary(struct rte_cdx_device *dev)
struct cdx_map *maps;
int vfio_dev_fd, i, ret;
+ if (rte_intr_fd_set(dev->intr_handle, -1))
+ return -1;
+
ret = rte_vfio_setup_device(CDX_BUS_DEVICES_PATH, dev_name,
&vfio_dev_fd, &device_info);
if (ret)
@@ -344,7 +449,7 @@ cdx_vfio_map_resource_primary(struct rte_cdx_device *dev)
free(reg);
}
- if (cdx_rte_vfio_setup_device(vfio_dev_fd) < 0) {
+ if (cdx_vfio_setup_device(dev, vfio_dev_fd, device_info.num_irqs) < 0) {
CDX_BUS_ERR("%s setup device failed", dev_name);
goto err_vfio_res;
}
@@ -373,6 +478,9 @@ cdx_vfio_map_resource_secondary(struct rte_cdx_device *dev)
const char *dev_name = dev->device.name;
struct cdx_map *maps;
+ if (rte_intr_fd_set(dev->intr_handle, -1))
+ return -1;
+
/* if we're in a secondary process, just find our tailq entry */
TAILQ_FOREACH(vfio_res, vfio_res_list, next) {
if (strcmp(vfio_res->name, dev_name))
@@ -406,6 +514,10 @@ cdx_vfio_map_resource_secondary(struct rte_cdx_device *dev)
dev->mem_resource[i].len = maps[i].size;
}
+ /* we need save vfio_dev_fd, so it can be used during release */
+ if (rte_intr_dev_fd_set(dev->intr_handle, vfio_dev_fd))
+ goto err_vfio_dev_fd;
+
return 0;
err_vfio_dev_fd:
rte_vfio_release_device(CDX_BUS_DEVICES_PATH, cdx_addr, vfio_dev_fd);
@@ -424,3 +536,63 @@ cdx_vfio_map_resource(struct rte_cdx_device *dev)
else
return cdx_vfio_map_resource_secondary(dev);
}
+
+int
+rte_cdx_vfio_intr_enable(const struct rte_intr_handle *intr_handle)
+{
+ char irq_set_buf[MSI_IRQ_SET_BUF_LEN];
+ struct vfio_irq_set *irq_set;
+ int *fd_ptr, vfio_dev_fd, i;
+ int ret;
+
+ irq_set = (struct vfio_irq_set *) irq_set_buf;
+ irq_set->count = rte_intr_nb_intr_get(intr_handle);
+ irq_set->argsz = sizeof(struct vfio_irq_set) +
+ (sizeof(int) * irq_set->count);
+
+ irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_TRIGGER;
+ irq_set->index = 0;
+ irq_set->start = 0;
+ fd_ptr = (int *) &irq_set->data;
+
+ for (i = 0; i < rte_intr_nb_efd_get(intr_handle); i++)
+ fd_ptr[i] = rte_intr_efds_index_get(intr_handle, i);
+
+ vfio_dev_fd = rte_intr_dev_fd_get(intr_handle);
+ ret = ioctl(vfio_dev_fd, VFIO_DEVICE_SET_IRQS, irq_set);
+
+ if (ret) {
+ CDX_BUS_ERR("Error enabling MSI interrupts for fd %d",
+ rte_intr_fd_get(intr_handle));
+ return -1;
+ }
+
+ return 0;
+}
+
+/* disable MSI interrupts */
+int
+rte_cdx_vfio_intr_disable(const struct rte_intr_handle *intr_handle)
+{
+ struct vfio_irq_set *irq_set;
+ char irq_set_buf[MSI_IRQ_SET_BUF_LEN];
+ int len, ret, vfio_dev_fd;
+
+ len = sizeof(struct vfio_irq_set);
+
+ irq_set = (struct vfio_irq_set *) irq_set_buf;
+ irq_set->argsz = len;
+ irq_set->count = 0;
+ irq_set->flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_TRIGGER;
+ irq_set->index = 0;
+ irq_set->start = 0;
+
+ vfio_dev_fd = rte_intr_dev_fd_get(intr_handle);
+ ret = ioctl(vfio_dev_fd, VFIO_DEVICE_SET_IRQS, irq_set);
+
+ if (ret)
+ CDX_BUS_ERR("Error disabling MSI interrupts for fd %d",
+ rte_intr_fd_get(intr_handle));
+
+ return ret;
+}
diff --git a/drivers/bus/cdx/version.map b/drivers/bus/cdx/version.map
index 957fcab978..2f3d484ebd 100644
--- a/drivers/bus/cdx/version.map
+++ b/drivers/bus/cdx/version.map
@@ -6,6 +6,8 @@ INTERNAL {
rte_cdx_register;
rte_cdx_unmap_device;
rte_cdx_unregister;
+ rte_cdx_vfio_intr_disable;
+ rte_cdx_vfio_intr_enable;
local: *;
};
--
2.17.1
next prev parent reply other threads:[~2023-06-05 13:27 UTC|newest]
Thread overview: 102+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-24 14:07 [RFC PATCH 0/6] add support for CDX bus Nipun Gupta
2023-01-24 14:07 ` [RFC PATCH 1/6] bus/cdx: introduce cdx bus Nipun Gupta
2023-01-24 14:07 ` [RFC PATCH 2/6] bus/cdx: add dma map and unmap support Nipun Gupta
2023-01-24 14:07 ` [RFC PATCH 3/6] bus/cdx: add support for MSI Nipun Gupta
2023-01-24 14:07 ` [RFC PATCH 4/6] bus/cdx: support plug unplug and dev iterator Nipun Gupta
2023-01-24 14:07 ` [RFC PATCH 5/6] bus: enable cdx bus Nipun Gupta
2023-01-24 14:07 ` [RFC PATCH 6/6] config/arm: add AMD CDX Nipun Gupta
2023-04-07 6:01 ` [PATCH 0/6] add support for CDX bus Nipun Gupta
2023-04-07 6:01 ` [PATCH 1/6] bus/cdx: introduce cdx bus Nipun Gupta
2023-04-07 6:01 ` [PATCH 2/6] bus/cdx: add dma map and unmap support Nipun Gupta
2023-04-07 6:01 ` [PATCH 3/6] bus/cdx: add support for MSI Nipun Gupta
2023-04-07 6:01 ` [PATCH 4/6] bus/cdx: support plug unplug and dev iterator Nipun Gupta
2023-04-07 6:01 ` [PATCH 5/6] bus: enable cdx bus Nipun Gupta
2023-04-07 6:01 ` [PATCH 6/6] config/arm: add AMD CDX Nipun Gupta
2023-04-07 7:18 ` [PATCH 0/6] add support for CDX bus David Marchand
2023-04-07 7:29 ` Nipun Gupta
2023-04-13 13:25 ` Gupta, Nipun
2023-04-13 13:26 ` [PATCH v2 " Nipun Gupta
2023-04-13 13:26 ` [PATCH v2 1/6] bus/cdx: introduce cdx bus Nipun Gupta
2023-04-14 16:45 ` Ferruh Yigit
2023-04-16 9:20 ` Gupta, Nipun
2023-04-13 13:27 ` [PATCH v2 2/6] bus/cdx: add dma map and unmap support Nipun Gupta
2023-04-13 13:27 ` [PATCH v2 3/6] bus/cdx: add support for MSI Nipun Gupta
2023-04-14 16:45 ` Ferruh Yigit
2023-04-16 9:20 ` Gupta, Nipun
2023-04-13 13:27 ` [PATCH v2 4/6] bus/cdx: support plug unplug and dev iterator Nipun Gupta
2023-04-13 13:27 ` [PATCH v2 5/6] bus: enable cdx bus Nipun Gupta
2023-04-14 16:45 ` Ferruh Yigit
2023-04-16 9:21 ` Gupta, Nipun
2023-04-13 13:27 ` [PATCH v2 6/6] config/arm: add AMD CDX Nipun Gupta
2023-04-14 16:45 ` [PATCH v2 0/6] add support for CDX bus Ferruh Yigit
2023-04-21 14:54 ` [PATCH v3 0/5] Support AMD CDX bus, for FPGA based CDX devices. The CDX Nipun Gupta
2023-04-21 14:54 ` [PATCH v3 1/5] bus/cdx: introduce cdx bus Nipun Gupta
2023-04-21 14:54 ` [PATCH v3 2/5] bus/cdx: add DMA map and unmap support Nipun Gupta
2023-04-21 14:54 ` [PATCH v3 3/5] bus/cdx: add support for MSI Nipun Gupta
2023-04-21 14:54 ` [PATCH v3 4/5] bus/cdx: support plug unplug and dev iterator Nipun Gupta
2023-04-21 14:54 ` [PATCH v3 5/5] config/arm: add AMD CDX Nipun Gupta
2023-05-04 15:28 ` Ferruh Yigit
2023-05-08 10:24 ` Gupta, Nipun
2023-05-08 10:44 ` Thomas Monjalon
2023-05-08 10:48 ` Gupta, Nipun
2023-05-08 11:26 ` Ferruh Yigit
2023-05-08 17:16 ` Honnappa Nagarahalli
2023-05-08 17:47 ` Ferruh Yigit
2023-05-09 4:35 ` Gupta, Nipun
2023-05-09 5:55 ` Ruifeng Wang
2023-06-14 10:30 ` Ferruh Yigit
2023-06-15 7:00 ` Ruifeng Wang
2023-05-08 11:18 ` [PATCH v4 0/4] Support AMD CDX bus, for FPGA based CDX devices. The CDX Nipun Gupta
2023-05-08 11:18 ` [PATCH v4 1/4] bus/cdx: introduce cdx bus Nipun Gupta
2023-05-09 6:54 ` Xia, Chenbo
2023-05-09 11:09 ` Gupta, Nipun
2023-05-09 11:25 ` Ferruh Yigit
2023-05-10 1:29 ` Xia, Chenbo
2023-05-24 11:14 ` Thomas Monjalon
2023-05-24 17:04 ` Gupta, Nipun
2023-05-08 11:18 ` [PATCH v4 2/4] bus/cdx: add DMA map and unmap support Nipun Gupta
2023-05-08 11:18 ` [PATCH v4 3/4] bus/cdx: add support for MSI Nipun Gupta
2023-05-24 11:06 ` Thomas Monjalon
2023-05-24 17:06 ` Gupta, Nipun
2023-05-08 11:18 ` [PATCH v4 4/4] bus/cdx: support plug unplug and dev iterator Nipun Gupta
2023-05-12 10:25 ` [PATCH v4 0/4] Support AMD CDX bus, for FPGA based CDX devices. The CDX Ferruh Yigit
2023-05-25 10:08 ` [PATCH v5 0/5] Support AMD CDX bus Nipun Gupta
2023-05-25 10:08 ` [PATCH v5 1/5] bus/cdx: introduce " Nipun Gupta
2023-06-01 15:00 ` David Marchand
2023-06-01 18:10 ` Nipun Gupta
2023-06-05 8:04 ` Nipun Gupta
2023-05-25 10:08 ` [PATCH v5 2/5] bus/cdx: add DMA map and unmap support Nipun Gupta
2023-06-01 15:07 ` David Marchand
2023-05-25 10:08 ` [PATCH v5 3/5] eal/interrupts: add IRQ count in interrupt handle Nipun Gupta
2023-06-01 15:25 ` David Marchand
2023-06-01 18:04 ` Nipun Gupta
2023-06-01 18:18 ` Gupta, Nipun
2023-06-06 7:18 ` [EXT] " Harman Kalra
2023-06-06 7:27 ` Nipun Gupta
2023-06-07 5:45 ` Harman Kalra
2023-05-25 10:08 ` [PATCH v5 4/5] bus/cdx: add support for MSI Nipun Gupta
2023-06-01 15:09 ` David Marchand
2023-06-05 8:05 ` Nipun Gupta
2023-05-25 10:08 ` [PATCH v5 5/5] bus/cdx: support plug unplug and dev iterator Nipun Gupta
2023-06-05 13:26 ` [PATCH v6 0/4] Support AMD CDX bus Nipun Gupta
2023-06-05 13:26 ` [PATCH v6 1/4] bus/cdx: introduce " Nipun Gupta
2023-06-06 8:55 ` Thomas Monjalon
2023-06-05 13:26 ` [PATCH v6 2/4] bus/cdx: add DMA map and unmap support Nipun Gupta
2023-06-05 13:26 ` Nipun Gupta [this message]
2023-06-06 9:30 ` [PATCH v6 3/4] bus/cdx: add support for MSI David Marchand
2023-06-06 9:42 ` Nipun Gupta
2023-06-05 13:26 ` [PATCH v6 4/4] bus/cdx: support plug unplug and dev iterator Nipun Gupta
2023-06-06 10:02 ` [PATCH v7 0/4] Support AMD CDX bus Nipun Gupta
2023-06-06 10:02 ` [PATCH v7 1/4] bus/cdx: introduce " Nipun Gupta
2023-06-06 13:00 ` Thomas Monjalon
2023-06-06 13:38 ` Nipun Gupta
2023-06-06 13:43 ` Thomas Monjalon
2023-06-06 10:02 ` [PATCH v7 2/4] bus/cdx: add DMA map and unmap support Nipun Gupta
2023-06-06 10:02 ` [PATCH v7 3/4] bus/cdx: add support for MSI Nipun Gupta
2023-06-06 10:02 ` [PATCH v7 4/4] bus/cdx: support plug unplug and dev iterator Nipun Gupta
2023-06-07 4:24 ` [PATCH v8 0/4] Support AMD CDX bus Nipun Gupta
2023-06-07 4:24 ` [PATCH v8 1/4] bus/cdx: introduce " Nipun Gupta
2023-06-07 4:24 ` [PATCH v8 2/4] bus/cdx: add DMA map and unmap support Nipun Gupta
2023-06-07 4:24 ` [PATCH v8 3/4] bus/cdx: add support for MSI Nipun Gupta
2023-06-07 4:24 ` [PATCH v8 4/4] bus/cdx: support plug unplug and dev iterator Nipun Gupta
2023-06-07 13:36 ` [PATCH v8 0/4] Support AMD CDX bus Thomas Monjalon
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