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From: Alex Elder <elder@ieee.org>
To: AngeloGioacchino Del Regno 
	<angelogioacchino.delregno@somainline.org>,
	elder@kernel.org
Cc: bjorn.andersson@linaro.org, agross@kernel.org,
	davem@davemloft.net, kuba@kernel.org,
	linux-arm-msm@vger.kernel.org, netdev@vger.kernel.org,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	konrad.dybcio@somainline.org, marijn.suijten@somainline.org,
	phone-devel@vger.kernel.org
Subject: Re: [PATCH v1 1/7] net: ipa: Add support for IPA v3.1 with GSI v1.0
Date: Wed, 5 May 2021 17:42:33 -0500
Message-ID: <b33a7daf-e4d5-c63a-c231-b6438562229b@ieee.org> (raw)
In-Reply-To: <20210211175015.200772-2-angelogioacchino.delregno@somainline.org>

On 2/11/21 11:50 AM, AngeloGioacchino Del Regno wrote:
> In preparation for adding support for the MSM8998 SoC's IPA,
> add the necessary bits for IPA version 3.1 featuring GSI 1.0,
> found on at least MSM8998.
> 
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>

Almost everything in this patch is the same as what is
now in the upstream code.  There were minor differences,
such as using version < IPA_VERSION_4_0 rather than
version <= IPA_VERSION_3_5_1, and some comment changes.

In this patch there is one thing you had that I did not,
and I show it below.

> ---
>   drivers/net/ipa/gsi.c          |  8 ++++----
>   drivers/net/ipa/ipa_endpoint.c | 17 +++++++++--------
>   drivers/net/ipa/ipa_main.c     |  8 ++++++--
>   drivers/net/ipa/ipa_reg.h      |  3 +++
>   drivers/net/ipa/ipa_version.h  |  1 +
>   5 files changed, 23 insertions(+), 14 deletions(-)
. . .

> diff --git a/drivers/net/ipa/ipa_main.c b/drivers/net/ipa/ipa_main.c
> index 84bb8ae92725..be191993fbec 100644
> --- a/drivers/net/ipa/ipa_main.c
> +++ b/drivers/net/ipa/ipa_main.c

. . .

> @@ -404,6 +405,9 @@ static void ipa_hardware_config(struct ipa *ipa)
>   		/* Enable open global clocks (not needed for IPA v4.5) */
>   		val = GLOBAL_FMASK;
>   		val |= GLOBAL_2X_CLK_FMASK;
> +		if (version == IPA_VERSION_3_1)
> +			val |= MISC_FMASK;
> +

This block of code is conditional on:
	if (version >= IPA_VERSION_4_0 && version < IPA_VERSION_4_5)

Therefore adding the MISC_FMASK here won't ever happen.  (It's
possible the code you were working with had some different
logic.)

I do, however, see in the msm-4.4 code that IPA v3.1 enables
the CLKON_CFG CGC_OPEN_MISC bit (only), stating that it's a
workaround.  So I will update the logic and add this.

					-Alex

>   		iowrite32(val, ipa->reg_virt + IPA_REG_CLKON_CFG_OFFSET);
>   
>   		/* Disable PA mask to allow HOLB drop */

. . .

  parent reply index

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-11 17:50 [PATCH v1 0/7] Add support for IPA v3.1, GSI v1.0, MSM8998 IPA AngeloGioacchino Del Regno
2021-02-11 17:50 ` [PATCH v1 1/7] net: ipa: Add support for IPA v3.1 with GSI v1.0 AngeloGioacchino Del Regno
2021-02-12 18:49   ` Jakub Kicinski
2021-03-02  2:05   ` Alex Elder
2021-05-05 22:42   ` Alex Elder [this message]
2021-02-11 17:50 ` [PATCH v1 2/7] net: ipa: endpoint: Don't read unexistant register on IPAv3.1 AngeloGioacchino Del Regno
2021-03-02  2:05   ` Alex Elder
2021-05-05 22:42   ` Alex Elder
2021-02-11 17:50 ` [PATCH v1 3/7] net: ipa: gsi: Avoid some writes during irq setup for older IPA AngeloGioacchino Del Regno
2021-03-02  2:05   ` Alex Elder
2021-05-05 22:42   ` Alex Elder
2021-02-11 17:50 ` [PATCH v1 4/7] net: ipa: gsi: Use right masks for GSI v1.0 channels hw param AngeloGioacchino Del Regno
2021-03-02  2:05   ` Alex Elder
2021-05-05 22:42   ` Alex Elder
2021-02-11 17:50 ` [PATCH v1 5/7] net: ipa: Add support for IPA on MSM8998 AngeloGioacchino Del Regno
2021-02-12 18:50   ` Jakub Kicinski
2021-03-02  2:05   ` Alex Elder
2021-05-05 22:42   ` Alex Elder
2021-02-11 17:50 ` [PATCH v1 6/7] dt-bindings: net: qcom-ipa: Document qcom,sc7180-ipa compatible AngeloGioacchino Del Regno
2021-03-02  2:05   ` Alex Elder
2021-03-05 19:32   ` Rob Herring
2021-05-05 22:43   ` Alex Elder
2021-02-11 17:50 ` [PATCH v1 7/7] dt-bindings: net: qcom-ipa: Document qcom,msm8998-ipa compatible AngeloGioacchino Del Regno
2021-03-02  2:05   ` Alex Elder
2021-03-05 19:33   ` Rob Herring
2021-05-05 22:43   ` Alex Elder
2021-02-11 20:27 ` [PATCH v1 0/7] Add support for IPA v3.1, GSI v1.0, MSM8998 IPA Alex Elder
2021-02-11 21:51   ` AngeloGioacchino Del Regno
2021-03-02  2:04 ` Alex Elder
2021-05-05 22:42 ` Alex Elder

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