linux-kernel - Re: [Patch V1 3/4] memory: tegra: add mc-err support for T186

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Date:   Wed, 12 Jan 2022 14:02:11 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Ashish Mhetre <amhetre@...dia.com>, thierry.reding@...il.com,
        jonathanh@...dia.com, linux-tegra@...r.kernel.org,
        krzysztof.kozlowski@...onical.com, linux-kernel@...r.kernel.org
Cc:     Snikam@...dia.com, vdumpa@...dia.com
Subject: Re: [Patch V1 3/4] memory: tegra: add mc-err support for T186

11.01.2022 21:45, Ashish Mhetre пишет:
> +static const struct tegra_mc_error int_mc_errors[] = {
> +	{
> +		.int_bit = MC_INT_DECERR_EMEM,
> +		.msg = "EMEM address decode error",
> +		.status_reg = MC_ERR_STATUS,
> +		.addr_reg = MC_ERR_ADR,
> +	},
> +	{
> +		.int_bit = MC_INT_SECURITY_VIOLATION,
> +		.msg = "non secure access to secure region",
> +		.status_reg = MC_ERR_STATUS,
> +		.addr_reg = MC_ERR_ADR,
> +	},
> +	{
> +		.int_bit = MC_INT_DECERR_VPR,
> +		.msg = "MC request violates VPR requirements",
> +		.status_reg = MC_ERR_VPR_STATUS,
> +		.addr_reg = MC_ERR_VPR_ADR,
> +	},
> +	{
> +		.int_bit = MC_INT_SECERR_SEC,
> +		.msg = "MC request violated SEC carveout requirements",
> +		.status_reg = MC_ERR_SEC_STATUS,
> +		.addr_reg = MC_ERR_SEC_ADR,
> +	},
> +	{
> +		.int_bit = MC_INT_DECERR_MTS,
> +		.msg = "MTS carveout access violation",
> +		.status_reg = MC_ERR_MTS_STATUS,
> +		.addr_reg = MC_ERR_MTS_ADR,
> +	},
> +	{
> +		.int_bit = MC_INT_DECERR_GENERALIZED_CARVEOUT,
> +		.msg = "GSC access violation",
> +		.status_reg = MC_ERR_GENERALIZED_CARVEOUT_STATUS,
> +		.addr_reg = MC_ERR_GENERALIZED_CARVEOUT_ADR,
> +	},
> +};
> +
> +static irqreturn_t tegra186_mc_handle_irq(int irq, void *data)
> +{
> +	struct tegra_mc *mc = data;
> +	unsigned long status;
> +	unsigned int bit;
> +
> +	status = mc_readl(mc, MC_INTSTATUS) & mc->soc->intmask;
> +	if (!status)
> +		return IRQ_NONE;
> +
> +	for_each_set_bit(bit, &status, 32) {
> +		const char *error = int_mc_errors[bit].msg ?: "unknown";

int_mc_errors[bit] isn't what you need and .int_bit is unused, which
suggests that all this code doesn't work and was untested. Please don't
send untested patches.