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Subject: Re: [PATCH v3 12/27] powerpc/powernv/pmem: Add register addresses &
 status values to the header
To:     "Alastair D'Silva" <alastair@au1.ibm.com>, alastair@d-silva.org
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        linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
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References: <20200221032720.33893-1-alastair@au1.ibm.com>
 <20200221032720.33893-13-alastair@au1.ibm.com>
From:   Andrew Donnellan <ajd@linux.ibm.com>
Date:   Thu, 27 Feb 2020 16:08:58 +1100
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On 21/2/20 2:27 pm, Alastair D'Silva wrote:
> From: Alastair D'Silva <alastair@d-silva.org>
> 
> These values have been taken from the device specifications.
> 
> Signed-off-by: Alastair D'Silva <alastair@d-silva.org>

I've compared these values against the internal version of the device 
specifications that I have access to, and they appear to match.

A few minor comments below, otherwise:

Reviewed-by: Andrew Donnellan <ajd@linux.ibm.com>

> +#define GLOBAL_MMIO_HCI_ACRW				BIT_ULL(0)
> +#define GLOBAL_MMIO_HCI_NSCRW				BIT_ULL(1)
> +#define GLOBAL_MMIO_HCI_AFU_RESET			BIT_ULL(2)
> +#define GLOBAL_MMIO_HCI_FW_DEBUG			BIT_ULL(3)
> +#define GLOBAL_MMIO_HCI_CONTROLLER_DUMP			BIT_ULL(4)
> +#define GLOBAL_MMIO_HCI_CONTROLLER_DUMP_COLLECTED	BIT_ULL(5)
> +#define GLOBAL_MMIO_HCI_REQ_HEALTH_PERF			BIT_ULL(6)

The labelling of some of these bits deviates from the standard 
abbreviations in the spec, which is fine I guess as these names are more 
descriptive, but maybe add a brief comment with the original abbreviation?

> +
> +#define ADMIN_COMMAND_HEARTBEAT		0x00u
> +#define ADMIN_COMMAND_SHUTDOWN		0x01u
> +#define ADMIN_COMMAND_FW_UPDATE		0x02u
> +#define ADMIN_COMMAND_FW_DEBUG		0x03u
> +#define ADMIN_COMMAND_ERRLOG		0x04u
> +#define ADMIN_COMMAND_SMART		0x05u
> +#define ADMIN_COMMAND_CONTROLLER_STATS	0x06u
> +#define ADMIN_COMMAND_CONTROLLER_DUMP	0x07u
> +#define ADMIN_COMMAND_CMD_CAPS		0x08u
> +#define ADMIN_COMMAND_MAX		0x08u
> +
> +#define STATUS_SUCCESS		0x00
> +#define STATUS_MEM_UNAVAILABLE	0x20

There's also a "blocked on account of background task" code, 0x21.

> +#define STATUS_BAD_OPCODE	0x50
> +#define STATUS_BAD_REQUEST_PARM	0x51
> +#define STATUS_BAD_DATA_PARM	0x52
> +#define STATUS_DEBUG_BLOCKED	0x70
> +#define STATUS_FAIL		0xFF
> +
> +#define STATUS_FW_UPDATE_BLOCKED 0x21
> +#define STATUS_FW_ARG_INVALID	0x51
> +#define STATUS_FW_INVALID	0x52

These status codes seem, from the specification, to correspond to the 
generic error codes above, so perhaps they're not needed.


-- 
Andrew Donnellan              OzLabs, ADL Canberra
ajd@linux.ibm.com             IBM Australia Limited