linux-kernel - Re: [PATCH net v2 3/4] net: ipa: kill FILT_ROUT_CACHE

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Date:   Wed, 15 Mar 2023 16:19:35 -0500
From:   Alex Elder <elder@...aro.org>
To:     davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com
Cc:     caleb.connolly@...aro.org, mka@...omium.org, evgreen@...omium.org,
        andersson@...nel.org, quic_cpratapa@...cinc.com,
        quic_avuyyuru@...cinc.com, quic_jponduru@...cinc.com,
        quic_subashab@...cinc.com, elder@...nel.org,
        netdev@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net v2 3/4] net: ipa: kill FILT_ROUT_CACHE_CFG IPA
 register

On 3/15/23 2:35 PM, Alex Elder wrote:
> A recent commit defined a few IPA registers used for IPA v5.0+.
> One of those was a mistake.  Although the filter and router caches
> get *flushed* using a single register, they use distinct registers
> (ENDP_FILTER_CACHE_CFG and ENDP_ROUTER_CACHE_CFG) for configuration.
> 
> And although there *exists* a FILT_ROUT_CACHE_CFG register, it is
> not needed in upstream code.  So get rid of definitions related to
> FILT_ROUT_CACHE_CFG, because they are not needed.
> 
> Fixes: de101ca79f97 ("net: ipa: define IPA v5.0+ registers")'

AGAIN!  This is a bad commit ID.  It should be 8ba59716d16a.

I've got a new series ready to go but I'll wait until
tomorrow to post it.

Sorry for the noise.

					-Alex


> Signed-off-by: Alex Elder <elder@...aro.org>
> ---
>   drivers/net/ipa/ipa_reg.c | 4 ++--
>   drivers/net/ipa/ipa_reg.h | 9 ---------
>   2 files changed, 2 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/net/ipa/ipa_reg.c b/drivers/net/ipa/ipa_reg.c
> index 735fa65916097..463a31dfa9f47 100644
> --- a/drivers/net/ipa/ipa_reg.c
> +++ b/drivers/net/ipa/ipa_reg.c
> @@ -39,7 +39,8 @@ static bool ipa_reg_id_valid(struct ipa *ipa, enum ipa_reg_id reg_id)
>   		return version <= IPA_VERSION_3_1;
>   
>   	case ENDP_FILTER_ROUTER_HSH_CFG:
> -		return version != IPA_VERSION_4_2;
> +		return version < IPA_VERSION_5_0 &&
> +			version != IPA_VERSION_4_2;
>   
>   	case IRQ_SUSPEND_EN:
>   	case IRQ_SUSPEND_CLR:
> @@ -52,7 +53,6 @@ static bool ipa_reg_id_valid(struct ipa *ipa, enum ipa_reg_id reg_id)
>   	case QSB_MAX_WRITES:
>   	case QSB_MAX_READS:
>   	case FILT_ROUT_HASH_EN:
> -	case FILT_ROUT_CACHE_CFG:
>   	case FILT_ROUT_HASH_FLUSH:
>   	case FILT_ROUT_CACHE_FLUSH:
>   	case STATE_AGGR_ACTIVE:
> diff --git a/drivers/net/ipa/ipa_reg.h b/drivers/net/ipa/ipa_reg.h
> index 28aa1351dd488..ff2be8be0f683 100644
> --- a/drivers/net/ipa/ipa_reg.h
> +++ b/drivers/net/ipa/ipa_reg.h
> @@ -61,7 +61,6 @@ enum ipa_reg_id {
>   	QSB_MAX_WRITES,
>   	QSB_MAX_READS,
>   	FILT_ROUT_HASH_EN,				/* Not IPA v5.0+ */
> -	FILT_ROUT_CACHE_CFG,				/* IPA v5.0+ */
>   	FILT_ROUT_HASH_FLUSH,				/* Not IPA v5.0+ */
>   	FILT_ROUT_CACHE_FLUSH,				/* IPA v5.0+ */
>   	STATE_AGGR_ACTIVE,
> @@ -206,14 +205,6 @@ enum ipa_reg_qsb_max_reads_field_id {
>   	GEN_QMB_1_MAX_READS_BEATS,			/* IPA v4.0+ */
>   };
>   
> -/* FILT_ROUT_CACHE_CFG register */
> -enum ipa_reg_filt_rout_cache_cfg_field_id {
> -	ROUTER_CACHE_EN,
> -	FILTER_CACHE_EN,
> -	LOW_PRI_HASH_HIT_DISABLE,
> -	LRU_EVICTION_THRESHOLD,
> -};
> -
>   /* FILT_ROUT_HASH_EN and FILT_ROUT_HASH_FLUSH registers */
>   enum ipa_reg_filt_rout_hash_field_id {
>   	IPV6_ROUTER_HASH,