Re: [dpdk-dev] [PATCH] i40e: support xen domain0

["Liu, Jijiang" <jijiang.liu@intel.com>]

Acked-by:  Jijiang Liu <jijiang.liu@intel.com>

> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Helin Zhang
> Sent: Thursday, August 14, 2014 2:13 PM
> To: dev@dpdk.org
> Subject: [dpdk-dev] [PATCH] i40e: support xen domain0
> 
> i40e was failing to run in XEN domain0, as the physical memory for adminq
> DMA should be allocated and translated in a different way for XEN domain0.
> So
> rte_memzone_reserve_bounded() should be used for DMA memory allocation,
> and rte_mem_phy2mch() should be used for DMA memory address translation
> to support running i40e PMD in XEN domain0.
> 
> Signed-off-by: Helin Zhang <helin.zhang@intel.com>
> ---
>  lib/librte_pmd_i40e/i40e_ethdev.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/lib/librte_pmd_i40e/i40e_ethdev.c
> b/lib/librte_pmd_i40e/i40e_ethdev.c
> index 9ed31b5..7a823a0 100644
> --- a/lib/librte_pmd_i40e/i40e_ethdev.c
> +++ b/lib/librte_pmd_i40e/i40e_ethdev.c
> @@ -1515,14 +1515,23 @@
> i40e_allocate_dma_mem_d(__attribute__((unused)) struct i40e_hw *hw,
> 
>  	id++;
>  	snprintf(z_name, sizeof(z_name), "i40e_dma_%"PRIu64, id);
> +#ifdef RTE_LIBRTE_XEN_DOM0
> +	mz = rte_memzone_reserve_bounded(z_name, size, 0, 0, alignment,
> +							RTE_PGSIZE_2M);
> +#else
>  	mz = rte_memzone_reserve_aligned(z_name, size, 0, 0, alignment);
> +#endif
>  	if (!mz)
>  		return I40E_ERR_NO_MEMORY;
> 
>  	mem->id = id;
>  	mem->size = size;
>  	mem->va = mz->addr;
> +#ifdef RTE_LIBRTE_XEN_DOM0
> +	mem->pa = rte_mem_phy2mch(mz->memseg_id, mz->phys_addr); #else
>  	mem->pa = mz->phys_addr;
> +#endif
> 
>  	return I40E_SUCCESS;
>  }
> --
> 1.8.1.4