linux-kernel - RE: [PATCH rdma-next 1/1] RDMA/mana_ib: Allocate PAGE aligned doorbell index

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Message-ID:
 <SA6PR21MB4231D37A20A3D862B5FB0392CEF72@SA6PR21MB4231.namprd21.prod.outlook.com>
Date: Wed, 5 Feb 2025 19:02:16 +0000
From: Long Li <longli@...rosoft.com>
To: Konstantin Taranov <kotaranov@...ux.microsoft.com>, Konstantin Taranov
	<kotaranov@...rosoft.com>, Shiraz Saleem <shirazsaleem@...rosoft.com>,
	"sharmaajay@...rosoft.com" <sharmaajay@...rosoft.com>, "jgg@...pe.ca"
	<jgg@...pe.ca>, "leon@...nel.org" <leon@...nel.org>
CC: "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH rdma-next 1/1] RDMA/mana_ib: Allocate PAGE aligned
 doorbell index

> Subject: [PATCH rdma-next 1/1] RDMA/mana_ib: Allocate PAGE aligned doorbell
> index
> 
> From: Konstantin Taranov <kotaranov@...rosoft.com>
> 
> Allocate a PAGE aligned doorbell index to ensure each process gets a separate
> PAGE sized doorbell area space remapped to it in mana_ib_mmap
> 
> Fixes: 0266a177631d ("RDMA/mana_ib: Add a driver for Microsoft Azure
> Network Adapter")
> Signed-off-by: Shiraz Saleem <shirazsaleem@...rosoft.com>
> Signed-off-by: Konstantin Taranov <kotaranov@...rosoft.com>

Reviewed-by: Long Li <longli@...rosoft.com>

> ---
>  drivers/infiniband/hw/mana/main.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/infiniband/hw/mana/main.c
> b/drivers/infiniband/hw/mana/main.c
> index ae1fb69..0b89fa0 100644
> --- a/drivers/infiniband/hw/mana/main.c
> +++ b/drivers/infiniband/hw/mana/main.c
> @@ -177,7 +177,7 @@ static int mana_gd_allocate_doorbell_page(struct
> gdma_context *gc,
> 
>  	req.resource_type = GDMA_RESOURCE_DOORBELL_PAGE;
>  	req.num_resources = 1;
> -	req.alignment = 1;
> +	req.alignment = PAGE_SIZE / MANA_PAGE_SIZE;
> 
>  	/* Have GDMA start searching from 0 */
>  	req.allocated_resources = 0;
> --
> 2.43.0