netdev - Re: [PATCH net-next v5 1/3] net: ethernet: ti: Add accessors for struct k3_cppi_desc

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Date: Thu, 28 Mar 2024 13:25:05 +0100
From: Julien Panis <jpanis@...libre.com>
To: Naveen Mamindlapalli <naveenm@...vell.com>,
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 Russell King <linux@...linux.org.uk>, Alexei Starovoitov <ast@...nel.org>,
 Daniel Borkmann <daniel@...earbox.net>,
 Jesper Dangaard Brouer <hawk@...nel.org>,
 John Fastabend <john.fastabend@...il.com>,
 Sumit Semwal <sumit.semwal@...aro.org>,
 Christian König <christian.koenig@....com>,
 Simon Horman <horms@...nel.org>, Andrew Lunn <andrew@...n.ch>,
 Ratheesh Kannoth <rkannoth@...vell.com>
Cc: "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
 "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
 "bpf@...r.kernel.org" <bpf@...r.kernel.org>,
 "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
 "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
 "linaro-mm-sig@...ts.linaro.org" <linaro-mm-sig@...ts.linaro.org>
Subject: Re: [PATCH net-next v5 1/3] net: ethernet: ti: Add accessors for
 struct k3_cppi_desc_pool members

On 3/28/24 13:06, Naveen Mamindlapalli wrote:
>> -----Original Message-----
>> From: Julien Panis <jpanis@...libre.com>
>> Sent: Thursday, March 28, 2024 2:57 PM
>> To: David S. Miller <davem@...emloft.net>; Eric Dumazet
>> <edumazet@...gle.com>; Jakub Kicinski <kuba@...nel.org>; Paolo Abeni
>> <pabeni@...hat.com>; Russell King <linux@...linux.org.uk>; Alexei Starovoitov
>> <ast@...nel.org>; Daniel Borkmann <daniel@...earbox.net>; Jesper Dangaard
>> Brouer <hawk@...nel.org>; John Fastabend <john.fastabend@...il.com>;
>> Sumit Semwal <sumit.semwal@...aro.org>; Christian König
>> <christian.koenig@....com>; Simon Horman <horms@...nel.org>; Andrew
>> Lunn <andrew@...n.ch>; Ratheesh Kannoth <rkannoth@...vell.com>
>> Cc: netdev@...r.kernel.org; linux-kernel@...r.kernel.org; bpf@...r.kernel.org;
>> linux-media@...r.kernel.org; dri-devel@...ts.freedesktop.org; linaro-mm-
>> sig@...ts.linaro.org; Julien Panis <jpanis@...libre.com>
>> Subject: [PATCH net-next v5 1/3] net: ethernet: ti: Add accessors
>> for struct k3_cppi_desc_pool members
>>
>> This patch adds accessors for desc_size and cpumem members. They may be
>> used, for instance, to compute a descriptor index.
>>
>> Signed-off-by: Julien Panis <jpanis@...libre.com>
>> ---
>>   drivers/net/ethernet/ti/k3-cppi-desc-pool.c | 12 ++++++++++++
>> drivers/net/ethernet/ti/k3-cppi-desc-pool.h |  2 ++
>>   2 files changed, 14 insertions(+)
>>
>> diff --git a/drivers/net/ethernet/ti/k3-cppi-desc-pool.c b/drivers/net/ethernet/ti/k3-
>> cppi-desc-pool.c
>> index 05cc7aab1ec8..fe8203c05731 100644
>> --- a/drivers/net/ethernet/ti/k3-cppi-desc-pool.c
>> +++ b/drivers/net/ethernet/ti/k3-cppi-desc-pool.c
>> @@ -132,5 +132,17 @@ size_t k3_cppi_desc_pool_avail(struct
>> k3_cppi_desc_pool *pool)  }  EXPORT_SYMBOL_GPL(k3_cppi_desc_pool_avail);
>>
>> +size_t k3_cppi_desc_pool_desc_size(struct k3_cppi_desc_pool *pool) {
>> +	return pool->desc_size;
> Don't you need to add NULL check on pool ptr since this function is exported?

Thanks for the review.
Absolutely, you're right.

>
>> +}
>> +EXPORT_SYMBOL_GPL(k3_cppi_desc_pool_desc_size);
>> +
>> +void *k3_cppi_desc_pool_cpuaddr(struct k3_cppi_desc_pool *pool) {
>> +	return pool->cpumem;
> Same here.
>
>> +}
>> +EXPORT_SYMBOL_GPL(k3_cppi_desc_pool_cpuaddr);
>> +
>>   MODULE_LICENSE("GPL");
>>   MODULE_DESCRIPTION("TI K3 CPPI5 descriptors pool API"); diff --git
>> a/drivers/net/ethernet/ti/k3-cppi-desc-pool.h b/drivers/net/ethernet/ti/k3-cppi-desc-
>> pool.h
>> index a7e3fa5e7b62..149d5579a5e2 100644
>> --- a/drivers/net/ethernet/ti/k3-cppi-desc-pool.h
>> +++ b/drivers/net/ethernet/ti/k3-cppi-desc-pool.h
>> @@ -26,5 +26,7 @@ k3_cppi_desc_pool_dma2virt(struct k3_cppi_desc_pool
>> *pool, dma_addr_t dma);  void *k3_cppi_desc_pool_alloc(struct
>> k3_cppi_desc_pool *pool);  void k3_cppi_desc_pool_free(struct
>> k3_cppi_desc_pool *pool, void *addr);  size_t k3_cppi_desc_pool_avail(struct
>> k3_cppi_desc_pool *pool);
>> +size_t k3_cppi_desc_pool_desc_size(struct k3_cppi_desc_pool *pool);
>> +void *k3_cppi_desc_pool_cpuaddr(struct k3_cppi_desc_pool *pool);
>>
>>   #endif /* K3_CPPI_DESC_POOL_H_ */
>>
>> --
>> 2.37.3
>>