net/ice: support flow ops thread safe

[dpdk.git] / drivers / raw / ifpga / base / ifpga_feature_dev.c

diff --git a/drivers/raw/ifpga/base/ifpga_feature_dev.c b/drivers/raw/ifpga/base/ifpga_feature_dev.c
index 63c8bcc..0f852a7 100644 (file)
--- a/drivers/raw/ifpga/base/ifpga_feature_dev.c
+++ b/drivers/raw/ifpga/base/ifpga_feature_dev.c
@@ -3,6 +3,7 @@
  */
 
 #include <sys/ioctl.h>
+#include <rte_vfio.h>
 
 #include "ifpga_feature_dev.h"
 
@@ -331,3 +332,61 @@ error:
        port_hw_uinit(port);
        return ret;
 }
+
+#define FPGA_MAX_MSIX_VEC_COUNT        128
+/* irq set buffer length for interrupt */
+#define MSIX_IRQ_SET_BUF_LEN (sizeof(struct vfio_irq_set) + \
+                               sizeof(int) * FPGA_MAX_MSIX_VEC_COUNT)
+
+/* only support msix for now*/
+static int vfio_msix_enable_block(s32 vfio_dev_fd, unsigned int vec_start,
+                                 unsigned int count, s32 *fds)
+{
+       char irq_set_buf[MSIX_IRQ_SET_BUF_LEN];
+       struct vfio_irq_set *irq_set;
+       int len, ret;
+       int *fd_ptr;
+
+       len = sizeof(irq_set_buf);
+
+       irq_set = (struct vfio_irq_set *)irq_set_buf;
+       irq_set->argsz = len;
+       /* 0 < irq_set->count < FPGA_MAX_MSIX_VEC_COUNT */
+       irq_set->count = count ?
+               (count > FPGA_MAX_MSIX_VEC_COUNT ?
+                FPGA_MAX_MSIX_VEC_COUNT : count) : 1;
+       irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
+                               VFIO_IRQ_SET_ACTION_TRIGGER;
+       irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX;
+       irq_set->start = vec_start;
+
+       fd_ptr = (int *)&irq_set->data;
+       opae_memcpy(fd_ptr, fds, sizeof(int) * count);
+
+       ret = ioctl(vfio_dev_fd, VFIO_DEVICE_SET_IRQS, irq_set);
+       if (ret)
+               printf("Error enabling MSI-X interrupts\n");
+
+       return ret;
+}
+
+int fpga_msix_set_block(struct ifpga_feature *feature, unsigned int start,
+                       unsigned int count, s32 *fds)
+{
+       struct feature_irq_ctx *ctx = feature->ctx;
+       unsigned int i;
+       int ret;
+
+       if (start >= feature->ctx_num || start + count > feature->ctx_num)
+               return -EINVAL;
+
+       /* assume that each feature has continuous vector space in msix*/
+       ret = vfio_msix_enable_block(feature->vfio_dev_fd,
+                                    ctx[start].idx, count, fds);
+       if (!ret) {
+               for (i = 0; i < count; i++)
+                       ctx[i].eventfd = fds[i];
+       }
+
+       return ret;
+}