Re: [PATCH v1 1/3] powerpc/powernv: Sync header with firmware

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

On Mon, 2014-06-23 at 12:14 +1000, Gavin Shan wrote:
> The patch synchronizes firmware header file (opal.h) for PCI error
> injection

The FW API you expose is not PCI specific. I haven't seen the
corresponding FW patches yet but I'm not fan of that single call
that collates unrelated things.

I much'd prefer see a opal_pci_err_inject that is specific to
IO(D)A errors, which takes a PHB ID and goes via the normal dispatch
to PHB ops inside OPAL. For the rest, especially core specific
injections, we can provide a separate dedicated call.

Cheers, 
Ben.

> Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
> ---
>  arch/powerpc/include/asm/opal.h                | 65 ++++++++++++++++++++++++++
>  arch/powerpc/platforms/powernv/opal-wrappers.S |  1 +
>  2 files changed, 66 insertions(+)
> 
> diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h
> index 66ad7a7..d982bb8 100644
> --- a/arch/powerpc/include/asm/opal.h
> +++ b/arch/powerpc/include/asm/opal.h
> @@ -175,6 +175,7 @@ extern int opal_enter_rtas(struct rtas_args *args,
>  #define OPAL_SET_PARAM				90
>  #define OPAL_DUMP_RESEND			91
>  #define OPAL_DUMP_INFO2				94
> +#define OPAL_ERR_INJECT				96
>  
>  #ifndef __ASSEMBLY__
>  
> @@ -219,6 +220,69 @@ enum OpalPciErrorSeverity {
>  	OPAL_EEH_SEV_INF	= 5
>  };
>  
> +enum OpalErrinjctType {
> +	OpalErrinjctTypeFirst			= 0,
> +	OpalErrinjctTypeFatal			= 1,
> +	OpalErrinjctTypeRecoverRandomEvent	= 2,
> +	OpalErrinjctTypeRecoverSpecialEvent	= 3,
> +	OpalErrinjctTypeCorruptedPage		= 4,
> +	OpalErrinjctTypeCorruptedSlb		= 5,
> +	OpalErrinjctTypeTranslatorFailure	= 6,
> +	OpalErrinjctTypeIoaBusError		= 7,
> +	OpalErrinjctTypeIoaBusError64		= 8,
> +	OpalErrinjctTypePlatformSpecific	= 9,
> +	OpalErrinjctTypeDcacheStart		= 10,
> +	OpalErrinjctTypeDcacheEnd		= 11,
> +	OpalErrinjctTypeIcacheStart		= 12,
> +	OpalErrinjctTypeIcacheEnd		= 13,
> +	OpalErrinjctTypeTlbStart		= 14,
> +	OpalErrinjctTypeTlbEnd			= 15,
> +	OpalErrinjctTypeUpstreamIoError		= 16,
> +	OpalErrinjctTypeLast			= 17,
> +
> +	/* IoaBusError & IoaBusError64 */
> +	OpalEitIoaLoadMemAddr			= 0,
> +	OpalEitIoaLoadMemData			= 1,
> +	OpalEitIoaLoadIoAddr			= 2,
> +	OpalEitIoaLoadIoData			= 3,
> +	OpalEitIoaLoadConfigAddr		= 4,
> +	OpalEitIoaLoadConfigData		= 5,
> +	OpalEitIoaStoreMemAddr			= 6,
> +	OpalEitIoaStoreMemData			= 7,
> +	OpalEitIoaStoreIoAddr			= 8,
> +	OpalEitIoaStoreIoData			= 9,
> +	OpalEitIoaStoreConfigAddr		= 10,
> +	OpalEitIoaStoreConfigData		= 11,
> +	OpalEitIoaDmaReadMemAddr		= 12,
> +	OpalEitIoaDmaReadMemData		= 13,
> +	OpalEitIoaDmaReadMemMaster		= 14,
> +	OpalEitIoaDmaReadMemTarget		= 15,
> +	OpalEitIoaDmaWriteMemAddr		= 16,
> +	OpalEitIoaDmaWriteMemData		= 17,
> +	OpalEitIoaDmaWriteMemMaster		= 18,
> +	OpalEitIoaDmaWriteMemTarget		= 19,
> +};
> +
> +struct OpalErrinjct {
> +	int32_t type;
> +	union {
> +		struct {
> +			uint32_t addr;
> +			uint32_t mask;
> +			uint64_t phb_id;
> +			uint32_t pe;
> +			uint32_t function;
> +		} ioa;
> +		struct {
> +			uint64_t addr;
> +			uint64_t mask;
> +			uint64_t phb_id;
> +			uint32_t pe;
> +			uint32_t function;
> +		} ioa64;
> +	};
> +};
> +
>  enum OpalShpcAction {
>  	OPAL_SHPC_GET_LINK_STATE = 0,
>  	OPAL_SHPC_GET_SLOT_STATE = 1
> @@ -870,6 +934,7 @@ int64_t opal_update_flash(uint64_t blk_list);
>  int64_t opal_dump_init(uint8_t dump_type);
>  int64_t opal_dump_info(__be32 *dump_id, __be32 *dump_size);
>  int64_t opal_dump_info2(__be32 *dump_id, __be32 *dump_size, __be32 *dump_type);
> +int64_t opal_err_injct(struct OpalErrinjct *ei);
>  int64_t opal_dump_read(uint32_t dump_id, uint64_t buffer);
>  int64_t opal_dump_ack(uint32_t dump_id);
>  int64_t opal_dump_resend_notification(void);
> diff --git a/arch/powerpc/platforms/powernv/opal-wrappers.S b/arch/powerpc/platforms/powernv/opal-wrappers.S
> index f531ffe..44b3d81 100644
> --- a/arch/powerpc/platforms/powernv/opal-wrappers.S
> +++ b/arch/powerpc/platforms/powernv/opal-wrappers.S
> @@ -136,6 +136,7 @@ OPAL_CALL(opal_resync_timebase,			OPAL_RESYNC_TIMEBASE);
>  OPAL_CALL(opal_dump_init,			OPAL_DUMP_INIT);
>  OPAL_CALL(opal_dump_info,			OPAL_DUMP_INFO);
>  OPAL_CALL(opal_dump_info2,			OPAL_DUMP_INFO2);
> +OPAL_CALL(opal_err_injct,			OPAL_ERR_INJECT);
>  OPAL_CALL(opal_dump_read,			OPAL_DUMP_READ);
>  OPAL_CALL(opal_dump_ack,			OPAL_DUMP_ACK);
>  OPAL_CALL(opal_get_msg,				OPAL_GET_MSG);