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| author | Tianyu Lan <Tianyu.Lan@microsoft.com> | 2021-12-13 08:14:05 +0100 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2021-12-20 19:01:09 +0100 |
| commit | 743b237c3a7b0f5b44aa704aae8a1058877b6322 (patch) | |
| tree | b8f10ea7c066f5f03db0da0644ae77384b77fe1d /drivers/hv/vmbus_drv.c | |
| parent | hyper-v: Enable swiotlb bounce buffer for Isolation VM (diff) | |
| download | linux-743b237c3a7b0f5b44aa704aae8a1058877b6322.tar.xz linux-743b237c3a7b0f5b44aa704aae8a1058877b6322.zip | |
scsi: storvsc: Add Isolation VM support for storvsc driver
In Isolation VM, all shared memory with host needs to mark visible
to host via hvcall. vmbus_establish_gpadl() has already done it for
storvsc rx/tx ring buffer. The page buffer used by vmbus_sendpacket_
mpb_desc() still needs to be handled. Use DMA API(scsi_dma_map/unmap)
to map these memory during sending/receiving packet and return swiotlb
bounce buffer dma address. In Isolation VM, swiotlb bounce buffer is
marked to be visible to host and the swiotlb force mode is enabled.
Set device's dma min align mask to HV_HYP_PAGE_SIZE - 1 in order to
keep the original data offset in the bounce buffer.
Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com>
Reviewed-by: Long Li <longli@microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20211213071407.314309-5-ltykernel@gmail.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'drivers/hv/vmbus_drv.c')
| -rw-r--r-- | drivers/hv/vmbus_drv.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index 392c1ac4f819..ae6ec503399a 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -33,6 +33,7 @@ #include <linux/random.h> #include <linux/kernel.h> #include <linux/syscore_ops.h> +#include <linux/dma-map-ops.h> #include <clocksource/hyperv_timer.h> #include "hyperv_vmbus.h" @@ -2078,6 +2079,7 @@ struct hv_device *vmbus_device_create(const guid_t *type, return child_device_obj; } +static u64 vmbus_dma_mask = DMA_BIT_MASK(64); /* * vmbus_device_register - Register the child device */ @@ -2118,6 +2120,8 @@ int vmbus_device_register(struct hv_device *child_device_obj) } hv_debug_add_dev_dir(child_device_obj); + child_device_obj->device.dma_mask = &vmbus_dma_mask; + child_device_obj->device.dma_parms = &child_device_obj->dma_parms; return 0; err_kset_unregister: |