[PATCH v6 1/2] drm/panfrost: Add specific register offset macros for JS and MMU AS

[Steven Price]

On 29/07/2022 15:46, Adrián Larumbe wrote:
> Each Panfrost job has its own job slot and MMU address space set of
> registers, which are selected with a job-specific index.
> 
> Turn the shift and stride used for selection of the right register set base
> into a define rather than using magic numbers.
> 
> Signed-off-by: Adrián Larumbe <adrian.larumbe at collabora.com>

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

> ---
>  drivers/gpu/drm/panfrost/panfrost_regs.h | 42 ++++++++++++++----------
>  1 file changed, 24 insertions(+), 18 deletions(-)
> 
> diff --git a/drivers/gpu/drm/panfrost/panfrost_regs.h b/drivers/gpu/drm/panfrost/panfrost_regs.h
> index accb4fa3adb8..919f44ac853d 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_regs.h
> +++ b/drivers/gpu/drm/panfrost/panfrost_regs.h
> @@ -226,23 +226,25 @@
>  #define JOB_INT_MASK_DONE(j)		BIT(j)
>  
>  #define JS_BASE				0x1800
> -#define JS_HEAD_LO(n)			(JS_BASE + ((n) * 0x80) + 0x00)
> -#define JS_HEAD_HI(n)			(JS_BASE + ((n) * 0x80) + 0x04)
> -#define JS_TAIL_LO(n)			(JS_BASE + ((n) * 0x80) + 0x08)
> -#define JS_TAIL_HI(n)			(JS_BASE + ((n) * 0x80) + 0x0c)
> -#define JS_AFFINITY_LO(n)		(JS_BASE + ((n) * 0x80) + 0x10)
> -#define JS_AFFINITY_HI(n)		(JS_BASE + ((n) * 0x80) + 0x14)
> -#define JS_CONFIG(n)			(JS_BASE + ((n) * 0x80) + 0x18)
> -#define JS_XAFFINITY(n)			(JS_BASE + ((n) * 0x80) + 0x1c)
> -#define JS_COMMAND(n)			(JS_BASE + ((n) * 0x80) + 0x20)
> -#define JS_STATUS(n)			(JS_BASE + ((n) * 0x80) + 0x24)
> -#define JS_HEAD_NEXT_LO(n)		(JS_BASE + ((n) * 0x80) + 0x40)
> -#define JS_HEAD_NEXT_HI(n)		(JS_BASE + ((n) * 0x80) + 0x44)
> -#define JS_AFFINITY_NEXT_LO(n)		(JS_BASE + ((n) * 0x80) + 0x50)
> -#define JS_AFFINITY_NEXT_HI(n)		(JS_BASE + ((n) * 0x80) + 0x54)
> -#define JS_CONFIG_NEXT(n)		(JS_BASE + ((n) * 0x80) + 0x58)
> -#define JS_COMMAND_NEXT(n)		(JS_BASE + ((n) * 0x80) + 0x60)
> -#define JS_FLUSH_ID_NEXT(n)		(JS_BASE + ((n) * 0x80) + 0x70)
> +#define JS_SLOT_STRIDE			0x80
> +
> +#define JS_HEAD_LO(n)			(JS_BASE + ((n) * JS_SLOT_STRIDE) + 0x00)
> +#define JS_HEAD_HI(n)			(JS_BASE + ((n) * JS_SLOT_STRIDE) + 0x04)
> +#define JS_TAIL_LO(n)			(JS_BASE + ((n) * JS_SLOT_STRIDE) + 0x08)
> +#define JS_TAIL_HI(n)			(JS_BASE + ((n) * JS_SLOT_STRIDE) + 0x0c)
> +#define JS_AFFINITY_LO(n)		(JS_BASE + ((n) * JS_SLOT_STRIDE) + 0x10)
> +#define JS_AFFINITY_HI(n)		(JS_BASE + ((n) * JS_SLOT_STRIDE) + 0x14)
> +#define JS_CONFIG(n)			(JS_BASE + ((n) * JS_SLOT_STRIDE) + 0x18)
> +#define JS_XAFFINITY(n)			(JS_BASE + ((n) * JS_SLOT_STRIDE) + 0x1c)
> +#define JS_COMMAND(n)			(JS_BASE + ((n) * JS_SLOT_STRIDE) + 0x20)
> +#define JS_STATUS(n)			(JS_BASE + ((n) * JS_SLOT_STRIDE) + 0x24)
> +#define JS_HEAD_NEXT_LO(n)		(JS_BASE + ((n) * JS_SLOT_STRIDE) + 0x40)
> +#define JS_HEAD_NEXT_HI(n)		(JS_BASE + ((n) * JS_SLOT_STRIDE) + 0x44)
> +#define JS_AFFINITY_NEXT_LO(n)		(JS_BASE + ((n) * JS_SLOT_STRIDE) + 0x50)
> +#define JS_AFFINITY_NEXT_HI(n)		(JS_BASE + ((n) * JS_SLOT_STRIDE) + 0x54)
> +#define JS_CONFIG_NEXT(n)		(JS_BASE + ((n) * JS_SLOT_STRIDE) + 0x58)
> +#define JS_COMMAND_NEXT(n)		(JS_BASE + ((n) * JS_SLOT_STRIDE) + 0x60)
> +#define JS_FLUSH_ID_NEXT(n)		(JS_BASE + ((n) * JS_SLOT_STRIDE) + 0x70)
>  
>  /* Possible values of JS_CONFIG and JS_CONFIG_NEXT registers */
>  #define JS_CONFIG_START_FLUSH_CLEAN		BIT(8)
> @@ -281,7 +283,9 @@
>  #define AS_COMMAND_FLUSH_MEM		0x05	/* Wait for memory accesses to complete, flush all the L1s cache then
>  						   flush all L2 caches then issue a flush region command to all MMUs */
>  
> -#define MMU_AS(as)			(0x2400 + ((as) << 6))
> +#define MMU_BASE			0x2400
> +#define MMU_AS_SHIFT			0x06
> +#define MMU_AS(as)			(MMU_BASE + ((as) << MMU_AS_SHIFT))
>  
>  #define AS_TRANSTAB_LO(as)		(MMU_AS(as) + 0x00) /* (RW) Translation Table Base Address for address space n, low word */
>  #define AS_TRANSTAB_HI(as)		(MMU_AS(as) + 0x04) /* (RW) Translation Table Base Address for address space n, high word */
> @@ -300,6 +304,8 @@
>  #define AS_FAULTEXTRA_LO(as)		(MMU_AS(as) + 0x38) /* (RO) Secondary fault address for address space n, low word */
>  #define AS_FAULTEXTRA_HI(as)		(MMU_AS(as) + 0x3C) /* (RO) Secondary fault address for address space n, high word */
>  
> +#define MMU_AS_STRIDE			(1 << MMU_AS_SHIFT)
> +
>  /*
>   * Begin LPAE MMU TRANSTAB register values
>   */