[PATCH v3 06/15] drm/panfrost: Do the exception -> string translation using a table

[Steven Price]

On 25/06/2021 14:33, Boris Brezillon wrote:
> Do the exception -> string translation using a table. This way we get
> rid of those magic numbers and can easily add new fields if we need
> to attach extra information to exception types.
> 
> v3:
> * Drop the error field
> 
> Signed-off-by: Boris Brezillon <boris.brezillon at collabora.com>

Reviewed-by: Steven Price <steven.price at arm.com>

> ---
>  drivers/gpu/drm/panfrost/panfrost_device.c | 130 +++++++++++++--------
>  1 file changed, 83 insertions(+), 47 deletions(-)
> 
> diff --git a/drivers/gpu/drm/panfrost/panfrost_device.c b/drivers/gpu/drm/panfrost/panfrost_device.c
> index bce6b0aff05e..736854542b05 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_device.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_device.c
> @@ -292,55 +292,91 @@ void panfrost_device_fini(struct panfrost_device *pfdev)
>  	panfrost_clk_fini(pfdev);
>  }
>  
> -const char *panfrost_exception_name(u32 exception_code)
> -{
> -	switch (exception_code) {
> -		/* Non-Fault Status code */
> -	case 0x00: return "NOT_STARTED/IDLE/OK";
> -	case 0x01: return "DONE";
> -	case 0x02: return "INTERRUPTED";
> -	case 0x03: return "STOPPED";
> -	case 0x04: return "TERMINATED";
> -	case 0x08: return "ACTIVE";
> -		/* Job exceptions */
> -	case 0x40: return "JOB_CONFIG_FAULT";
> -	case 0x41: return "JOB_POWER_FAULT";
> -	case 0x42: return "JOB_READ_FAULT";
> -	case 0x43: return "JOB_WRITE_FAULT";
> -	case 0x44: return "JOB_AFFINITY_FAULT";
> -	case 0x48: return "JOB_BUS_FAULT";
> -	case 0x50: return "INSTR_INVALID_PC";
> -	case 0x51: return "INSTR_INVALID_ENC";
> -	case 0x52: return "INSTR_TYPE_MISMATCH";
> -	case 0x53: return "INSTR_OPERAND_FAULT";
> -	case 0x54: return "INSTR_TLS_FAULT";
> -	case 0x55: return "INSTR_BARRIER_FAULT";
> -	case 0x56: return "INSTR_ALIGN_FAULT";
> -	case 0x58: return "DATA_INVALID_FAULT";
> -	case 0x59: return "TILE_RANGE_FAULT";
> -	case 0x5A: return "ADDR_RANGE_FAULT";
> -	case 0x60: return "OUT_OF_MEMORY";
> -		/* GPU exceptions */
> -	case 0x80: return "DELAYED_BUS_FAULT";
> -	case 0x88: return "SHAREABILITY_FAULT";
> -		/* MMU exceptions */
> -	case 0xC1: return "TRANSLATION_FAULT_LEVEL1";
> -	case 0xC2: return "TRANSLATION_FAULT_LEVEL2";
> -	case 0xC3: return "TRANSLATION_FAULT_LEVEL3";
> -	case 0xC4: return "TRANSLATION_FAULT_LEVEL4";
> -	case 0xC8: return "PERMISSION_FAULT";
> -	case 0xC9 ... 0xCF: return "PERMISSION_FAULT";
> -	case 0xD1: return "TRANSTAB_BUS_FAULT_LEVEL1";
> -	case 0xD2: return "TRANSTAB_BUS_FAULT_LEVEL2";
> -	case 0xD3: return "TRANSTAB_BUS_FAULT_LEVEL3";
> -	case 0xD4: return "TRANSTAB_BUS_FAULT_LEVEL4";
> -	case 0xD8: return "ACCESS_FLAG";
> -	case 0xD9 ... 0xDF: return "ACCESS_FLAG";
> -	case 0xE0 ... 0xE7: return "ADDRESS_SIZE_FAULT";
> -	case 0xE8 ... 0xEF: return "MEMORY_ATTRIBUTES_FAULT";
> +#define PANFROST_EXCEPTION(id) \
> +	[DRM_PANFROST_EXCEPTION_ ## id] = { \
> +		.name = #id, \
>  	}
>  
> -	return "UNKNOWN";
> +struct panfrost_exception_info {
> +	const char *name;
> +};
> +
> +static const struct panfrost_exception_info panfrost_exception_infos[] = {
> +	PANFROST_EXCEPTION(OK),
> +	PANFROST_EXCEPTION(DONE),
> +	PANFROST_EXCEPTION(INTERRUPTED),
> +	PANFROST_EXCEPTION(STOPPED),
> +	PANFROST_EXCEPTION(TERMINATED),
> +	PANFROST_EXCEPTION(KABOOM),
> +	PANFROST_EXCEPTION(EUREKA),
> +	PANFROST_EXCEPTION(ACTIVE),
> +	PANFROST_EXCEPTION(JOB_CONFIG_FAULT),
> +	PANFROST_EXCEPTION(JOB_POWER_FAULT),
> +	PANFROST_EXCEPTION(JOB_READ_FAULT),
> +	PANFROST_EXCEPTION(JOB_WRITE_FAULT),
> +	PANFROST_EXCEPTION(JOB_AFFINITY_FAULT),
> +	PANFROST_EXCEPTION(JOB_BUS_FAULT),
> +	PANFROST_EXCEPTION(INSTR_INVALID_PC),
> +	PANFROST_EXCEPTION(INSTR_INVALID_ENC),
> +	PANFROST_EXCEPTION(INSTR_TYPE_MISMATCH),
> +	PANFROST_EXCEPTION(INSTR_OPERAND_FAULT),
> +	PANFROST_EXCEPTION(INSTR_TLS_FAULT),
> +	PANFROST_EXCEPTION(INSTR_BARRIER_FAULT),
> +	PANFROST_EXCEPTION(INSTR_ALIGN_FAULT),
> +	PANFROST_EXCEPTION(DATA_INVALID_FAULT),
> +	PANFROST_EXCEPTION(TILE_RANGE_FAULT),
> +	PANFROST_EXCEPTION(ADDR_RANGE_FAULT),
> +	PANFROST_EXCEPTION(IMPRECISE_FAULT),
> +	PANFROST_EXCEPTION(OOM),
> +	PANFROST_EXCEPTION(OOM_AFBC),
> +	PANFROST_EXCEPTION(UNKNOWN),
> +	PANFROST_EXCEPTION(DELAYED_BUS_FAULT),
> +	PANFROST_EXCEPTION(GPU_SHAREABILITY_FAULT),
> +	PANFROST_EXCEPTION(SYS_SHAREABILITY_FAULT),
> +	PANFROST_EXCEPTION(GPU_CACHEABILITY_FAULT),
> +	PANFROST_EXCEPTION(TRANSLATION_FAULT_0),
> +	PANFROST_EXCEPTION(TRANSLATION_FAULT_1),
> +	PANFROST_EXCEPTION(TRANSLATION_FAULT_2),
> +	PANFROST_EXCEPTION(TRANSLATION_FAULT_3),
> +	PANFROST_EXCEPTION(TRANSLATION_FAULT_4),
> +	PANFROST_EXCEPTION(TRANSLATION_FAULT_IDENTITY),
> +	PANFROST_EXCEPTION(PERM_FAULT_0),
> +	PANFROST_EXCEPTION(PERM_FAULT_1),
> +	PANFROST_EXCEPTION(PERM_FAULT_2),
> +	PANFROST_EXCEPTION(PERM_FAULT_3),
> +	PANFROST_EXCEPTION(TRANSTAB_BUS_FAULT_0),
> +	PANFROST_EXCEPTION(TRANSTAB_BUS_FAULT_1),
> +	PANFROST_EXCEPTION(TRANSTAB_BUS_FAULT_2),
> +	PANFROST_EXCEPTION(TRANSTAB_BUS_FAULT_3),
> +	PANFROST_EXCEPTION(ACCESS_FLAG_0),
> +	PANFROST_EXCEPTION(ACCESS_FLAG_1),
> +	PANFROST_EXCEPTION(ACCESS_FLAG_2),
> +	PANFROST_EXCEPTION(ACCESS_FLAG_3),
> +	PANFROST_EXCEPTION(ADDR_SIZE_FAULT_IN0),
> +	PANFROST_EXCEPTION(ADDR_SIZE_FAULT_IN1),
> +	PANFROST_EXCEPTION(ADDR_SIZE_FAULT_IN2),
> +	PANFROST_EXCEPTION(ADDR_SIZE_FAULT_IN3),
> +	PANFROST_EXCEPTION(ADDR_SIZE_FAULT_OUT0),
> +	PANFROST_EXCEPTION(ADDR_SIZE_FAULT_OUT1),
> +	PANFROST_EXCEPTION(ADDR_SIZE_FAULT_OUT2),
> +	PANFROST_EXCEPTION(ADDR_SIZE_FAULT_OUT3),
> +	PANFROST_EXCEPTION(MEM_ATTR_FAULT_0),
> +	PANFROST_EXCEPTION(MEM_ATTR_FAULT_1),
> +	PANFROST_EXCEPTION(MEM_ATTR_FAULT_2),
> +	PANFROST_EXCEPTION(MEM_ATTR_FAULT_3),
> +	PANFROST_EXCEPTION(MEM_ATTR_NONCACHE_0),
> +	PANFROST_EXCEPTION(MEM_ATTR_NONCACHE_1),
> +	PANFROST_EXCEPTION(MEM_ATTR_NONCACHE_2),
> +	PANFROST_EXCEPTION(MEM_ATTR_NONCACHE_3),
> +};
> +
> +const char *panfrost_exception_name(u32 exception_code)
> +{
> +	if (WARN_ON(exception_code >= ARRAY_SIZE(panfrost_exception_infos) ||
> +		    !panfrost_exception_infos[exception_code].name))
> +		return "Unknown exception type";
> +
> +	return panfrost_exception_infos[exception_code].name;
>  }
>  
>  void panfrost_device_reset(struct panfrost_device *pfdev)
>