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From: Ferruh Yigit <ferruh.yigit@intel.com>
To: Michal Krawczyk <mk@semihalf.com>, dev@dpdk.org
Cc: mw@semihalf.com, mba@semihalf.com, gtzalik@amazon.com,
	evgenys@amazon.com, igorch@amazon.com
Subject: Re: [dpdk-dev] [PATCH v2 11/29] net/ena/base: use 48-bit memory addresses in ena_com
Date: Thu, 2 Apr 2020 13:55:47 +0100	[thread overview]
Message-ID: <0c4c2200-d78f-0af0-2496-747f8629188b@intel.com> (raw)
In-Reply-To: <20200401142127.13715-12-mk@semihalf.com>

On 4/1/2020 3:21 PM, Michal Krawczyk wrote:
> ENA device is using 48-bit memory for IO. because of that, the upper
> limit had to be updated.

What is the impact of this change, and what is the reason of the change? Can you
please explain in the commit log?

> 
> Signed-off-by: Michal Krawczyk <mk@semihalf.com>
> Reviewed-by: Igor Chauskin <igorch@amazon.com>
> Reviewed-by: Guy Tzalik <gtzalik@amazon.com>
> ---
>  drivers/net/ena/base/ena_com.c                  | 2 +-
>  drivers/net/ena/base/ena_defs/ena_common_defs.h | 6 +++++-
>  2 files changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ena/base/ena_com.c b/drivers/net/ena/base/ena_com.c
> index 7c1d0aef20..b7749209b3 100644
> --- a/drivers/net/ena/base/ena_com.c
> +++ b/drivers/net/ena/base/ena_com.c
> @@ -73,7 +73,7 @@ static int ena_com_mem_addr_set(struct ena_com_dev *ena_dev,
>  	}
>  
>  	ena_addr->mem_addr_low = lower_32_bits(addr);
> -	ena_addr->mem_addr_high = upper_32_bits(addr);
> +	ena_addr->mem_addr_high = (u16)upper_32_bits(addr);
>  
>  	return 0;
>  }
> diff --git a/drivers/net/ena/base/ena_defs/ena_common_defs.h b/drivers/net/ena/base/ena_defs/ena_common_defs.h
> index 1818c29a87..349474d265 100644
> --- a/drivers/net/ena/base/ena_defs/ena_common_defs.h
> +++ b/drivers/net/ena/base/ena_defs/ena_common_defs.h
> @@ -9,10 +9,14 @@
>  #define ENA_COMMON_SPEC_VERSION_MAJOR        2
>  #define ENA_COMMON_SPEC_VERSION_MINOR        0
>  
> +/* ENA operates with 48-bit memory addresses. ena_mem_addr_t */
>  struct ena_common_mem_addr {
>  	uint32_t mem_addr_low;
>  
> -	uint32_t mem_addr_high;
> +	uint16_t mem_addr_high;
> +
> +	/* MBZ */
> +	uint16_t reserved16;
>  };
>  
>  #endif /* _ENA_COMMON_H_ */
> 


  reply	other threads:[~2020-04-02 12:55 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-01 14:20 [dpdk-dev] [PATCH v2 00/29] Update ENA driver to v2.1.0 Michal Krawczyk
2020-04-01 14:20 ` [dpdk-dev] [PATCH v2 01/29] net/ena: check if size of buffer is at least 1400B Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 02/29] net/ena/base: make allocation macros thread-safe Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 03/29] net/ena/base: prevent allocation of 0-sized memory Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 04/29] net/ena/base: set default hash key Michal Krawczyk
2020-04-02 12:36   ` Ferruh Yigit
2020-04-03 11:10     ` Michał Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 05/29] net/ena/base: rework interrupt moderation Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 06/29] net/ena/base: remove extra properties strings Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 07/29] net/ena/base: add accelerated LLQ mode Michal Krawczyk
2020-04-02 12:41   ` Ferruh Yigit
2020-04-03 11:15     ` Michał Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 08/29] net/ena/base: fix documentation of the functions Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 09/29] net/ena/base: fix indentation in cq polling Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 10/29] net/ena/base: add error logs when preparing Tx Michal Krawczyk
2020-04-02 12:53   ` Ferruh Yigit
2020-04-03 11:31     ` Michał Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 11/29] net/ena/base: use 48-bit memory addresses in ena_com Michal Krawczyk
2020-04-02 12:55   ` Ferruh Yigit [this message]
2020-04-03 12:14     ` Michał Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 12/29] net/ena/base: fix types for printing timestamps Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 13/29] net/ena/base: fix indentation of multiple defines Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 14/29] net/ena/base: update gen date and commit Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 15/29] net/ena: set IO ring size to the valid value Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 16/29] net/ena: refactor getting IO queues capabilities Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 17/29] net/ena: add support for large LLQ headers Michal Krawczyk
2020-04-02 13:02   ` Ferruh Yigit
2020-04-03 12:15     ` Michał Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 18/29] net/ena: remove memory barriers before doorbells Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 19/29] net/ena: add Tx drops statistic Michal Krawczyk
2020-04-02 13:05   ` Ferruh Yigit
2020-04-03 12:30     ` Michał Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 20/29] net/ena: disable meta caching Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 21/29] net/ena: refactor Rx path Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 22/29] net/ena: rework getting number of available descs Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 23/29] net/ena: limit refill threshold by fixed value Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 24/29] net/ena: use macros for ring idx operations Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 25/29] net/ena: refactor Tx path Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 26/29] net/ena: reuse 0 length Rx descriptor Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 27/29] doc: add notes on ENA usage on metal instances Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 28/29] net/ena: update copyright date Michal Krawczyk
2020-04-02 15:51   ` Ferruh Yigit
2020-04-03 12:31     ` Michał Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 29/29] net/ena: update version of the driver to v2.1.0 Michal Krawczyk
2020-04-02 15:53   ` Ferruh Yigit
2020-04-03 12:32     ` Michał Krawczyk

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