On Wed, Aug 28, 2019 at 07:53:28PM +0530, Sukrit Bhatnagar wrote:
> vmstate_pvrdma describes the PCI and MSIX states as well as the dma
> address for dsr and the gid table of device.
> vmstate_pvrdma_gids describes each gid in the gid table.
>
> pvrdma_post_save() does the job of unregistering gid entries from the
> backend device in the source host.
>
> pvrdma_post_load() maps to dsr using the loaded dma address, registers
> each loaded gid into the backend device, and finally calls load_dsr()
> to perform other mappings and ring init operations.
>
> Cc: Marcel Apfelbaum <marcel.apfelb...@gmail.com>
> Cc: Yuval Shaia <yuval.sh...@oracle.com>
> Signed-off-by: Sukrit Bhatnagar <skrtbht...@gmail.com>
> ---
> hw/rdma/vmw/pvrdma_main.c | 77 +++++++++++++++++++++++++++++++++++++++
> 1 file changed, 77 insertions(+)
>
> diff --git a/hw/rdma/vmw/pvrdma_main.c b/hw/rdma/vmw/pvrdma_main.c
> index 6c90db96f9..6f8b56dea3 100644
> --- a/hw/rdma/vmw/pvrdma_main.c
> +++ b/hw/rdma/vmw/pvrdma_main.c
> @@ -28,6 +28,7 @@
> #include "sysemu/sysemu.h"
> #include "monitor/monitor.h"
> #include "hw/rdma/rdma.h"
> +#include "migration/register.h"
>
> #include "../rdma_rm.h"
> #include "../rdma_backend.h"
> @@ -593,6 +594,81 @@ static void pvrdma_shutdown_notifier(Notifier *n, void
> *opaque)
> pvrdma_fini(pci_dev);
> }
>
> +static int pvrdma_post_save(void *opaque)
> +{
> + int i, rc;
> + PVRDMADev *dev = opaque;
> +
> + for (i = 0; i < MAX_GIDS; i++) {
> +
> + if (!dev->rdma_dev_res.port.gid_tbl[i].gid.global.interface_id) {
> + continue;
> + }
> + rc = rdma_backend_del_gid(&dev->backend_dev,
> + dev->backend_eth_device_name,
> + &dev->rdma_dev_res.port.gid_tbl[i].gid);
> + if (rc) {
> + return -EINVAL;
> + }
> + }
> +
> + return 0;
> +}
> +
> +static int pvrdma_post_load(void *opaque, int version_id)
> +{
> + int i, rc;
> + PVRDMADev *dev = opaque;
> + PCIDevice *pci_dev = PCI_DEVICE(dev);
> + DSRInfo *dsr_info = &dev->dsr_info;
> +
> + dsr_info->dsr = rdma_pci_dma_map(pci_dev, dsr_info->dma,
> + sizeof(struct pvrdma_device_shared_region));
> + if (!dsr_info->dsr) {
> + rdma_error_report("Failed to map to DSR");
> + return -ENOMEM;
> + }
> +
> + for (i = 0; i < MAX_GIDS; i++) {
> +
> + if (!dev->rdma_dev_res.port.gid_tbl[i].gid.global.interface_id) {
> + continue;
> + }
> +
> + rc = rdma_backend_add_gid(&dev->backend_dev,
> + dev->backend_eth_device_name,
> + &dev->rdma_dev_res.port.gid_tbl[i].gid);
> + if (rc) {
> + return -EINVAL;
> + }
> + }
> +
> + return load_dsr(dev);
This check is better performed before any gid manipulation on the host
because no one will undo it if load_dsr fails.
> +}
> +
> +static const VMStateDescription vmstate_pvrdma_gids = {
> + .name = "pvrdma-gids",
> + .fields = (VMStateField[]) {
> + VMSTATE_UINT8_ARRAY_V(gid.raw, RdmaRmGid, 16, 0),
> + VMSTATE_END_OF_LIST()
> + }
> +};
> +
> +static const VMStateDescription vmstate_pvrdma = {
> + .name = PVRDMA_HW_NAME,
> + .post_save = pvrdma_post_save,
> + .post_load = pvrdma_post_load,
> + .fields = (VMStateField[]) {
> + VMSTATE_PCI_DEVICE(parent_obj, PVRDMADev),
> + VMSTATE_MSIX(parent_obj, PVRDMADev),
> + VMSTATE_UINT64(dsr_info.dma, PVRDMADev),
> + VMSTATE_STRUCT_ARRAY(rdma_dev_res.port.gid_tbl, PVRDMADev,
> + MAX_PORT_GIDS, 0, vmstate_pvrdma_gids,
> + RdmaRmGid),
> + VMSTATE_END_OF_LIST()
> + }
> +};
> +
> static void pvrdma_realize(PCIDevice *pdev, Error **errp)
> {
> int rc = 0;
> @@ -688,6 +764,7 @@ static void pvrdma_class_init(ObjectClass *klass, void
> *data)
>
> dc->desc = "RDMA Device";
> dc->props = pvrdma_dev_properties;
> + dc->vmsd = &vmstate_pvrdma;
> set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
>
> ir->print_statistics = pvrdma_print_statistics;
> --
> 2.21.0
>
>
