Re: [PATCH v2 03/15] drm/panthor: Add GPU register definitions

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On 09/08/2023 17:53, Boris Brezillon wrote:
> Those are the registers directly accessible through the MMIO range.
> 
> FW registers are exposed in panthor_fw.h.
> 
> v2:
> - Rename the driver (pancsf -> panthor)
> - Change the license (GPL2 -> MIT + GPL2)
> - Split the driver addition commit
> 
> Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>

Two possible redundant defines (see below), but otherwise:

Reviewed-by: Steven Price <steven.price@xxxxxxx>

> ---
>  drivers/gpu/drm/panthor/panthor_regs.h | 229 +++++++++++++++++++++++++
>  1 file changed, 229 insertions(+)
>  create mode 100644 drivers/gpu/drm/panthor/panthor_regs.h
> 
> diff --git a/drivers/gpu/drm/panthor/panthor_regs.h b/drivers/gpu/drm/panthor/panthor_regs.h
> new file mode 100644
> index 000000000000..00e149cf9eab
> --- /dev/null
> +++ b/drivers/gpu/drm/panthor/panthor_regs.h
> @@ -0,0 +1,229 @@
> +/* SPDX-License-Identifier: GPL-2.0 or MIT */
> +/* Copyright 2018 Marty E. Plummer <hanetzer@xxxxxxxxxxxxx> */
> +/* Copyright 2019 Linaro, Ltd, Rob Herring <robh@xxxxxxxxxx> */
> +/* Copyright 2023 Collabora ltd. */
> +/*
> + * Register definitions based on mali_kbase_gpu_regmap.h and
> + * mali_kbase_gpu_regmap_csf.h
> + * (C) COPYRIGHT 2010-2022 ARM Limited. All rights reserved.
> + */
> +#ifndef __PANTHOR_REGS_H__
> +#define __PANTHOR_REGS_H__
> +
> +#define GPU_ID						0x00
> +#define GPU_L2_FEATURES					0x004
> +#define GPU_TILER_FEATURES				0x00C
> +#define GPU_MEM_FEATURES				0x010
> +#define   GROUPS_L2_COHERENT				BIT(0)
> +
> +#define GPU_MMU_FEATURES				0x014
> +#define  GPU_MMU_FEATURES_VA_BITS(x)			((x) & GENMASK(7, 0))
> +#define  GPU_MMU_FEATURES_PA_BITS(x)			(((x) >> 8) & GENMASK(7, 0))
> +#define GPU_AS_PRESENT					0x018
> +#define GPU_CSF_ID					0x01C
> +
> +#define GPU_INT_RAWSTAT					0x20
> +#define GPU_INT_CLEAR					0x24
> +#define GPU_INT_MASK					0x28
> +#define GPU_INT_STAT					0x2c
> +#define   GPU_IRQ_FAULT					BIT(0)
> +#define   GPU_IRQ_PROTM_FAULT				BIT(1)
> +#define   GPU_IRQ_RESET_COMPLETED			BIT(8)
> +#define   GPU_IRQ_POWER_CHANGED				BIT(9)
> +#define   GPU_IRQ_POWER_CHANGED_ALL			BIT(10)
> +#define   GPU_IRQ_CLEAN_CACHES_COMPLETED		BIT(17)
> +#define   GPU_IRQ_DOORBELL_MIRROR			BIT(18)
> +#define   GPU_IRQ_MCU_STATUS_CHANGED			BIT(19)
> +#define GPU_CMD						0x30
> +#define   GPU_CMD_DEF(type, payload)			((type) | ((payload) << 8))
> +#define   GPU_SOFT_RESET				GPU_CMD_DEF(1, 1)
> +#define   GPU_HARD_RESET				GPU_CMD_DEF(1, 2)
> +#define   CACHE_CLEAN					BIT(0)
> +#define   CACHE_INV					BIT(1)
> +#define   GPU_FLUSH_CACHES(l2, lsc, oth)		\
> +	  GPU_CMD_DEF(4, ((l2) << 0) | ((lsc) << 4) | ((oth) << 8))
> +
> +#define GPU_STATUS					0x34
> +#define   GPU_STATUS_ACTIVE				BIT(0)
> +#define   GPU_STATUS_PWR_ACTIVE				BIT(1)
> +#define   GPU_STATUS_PAGE_FAULT				BIT(4)
> +#define   GPU_STATUS_PROTM_ACTIVE			BIT(7)
> +#define   GPU_STATUS_DBG_ENABLED			BIT(8)
> +
> +#define GPU_FAULT_STATUS				0x3C
> +#define GPU_FAULT_ADDR_LO				0x40
> +#define GPU_FAULT_ADDR_HI				0x44
> +
> +#define GPU_PWR_KEY					0x50
> +#define  GPU_PWR_KEY_UNLOCK				0x2968A819
> +#define GPU_PWR_OVERRIDE0				0x54
> +#define GPU_PWR_OVERRIDE1				0x58
> +
> +#define GPU_TIMESTAMP_OFFSET_LO				0x88
> +#define GPU_TIMESTAMP_OFFSET_HI				0x8C
> +#define GPU_CYCLE_COUNT_LO				0x90
> +#define GPU_CYCLE_COUNT_HI				0x94
> +#define GPU_TIMESTAMP_LO				0x98
> +#define GPU_TIMESTAMP_HI				0x9C
> +
> +#define GPU_THREAD_MAX_THREADS				0xA0
> +#define GPU_THREAD_MAX_WORKGROUP_SIZE			0xA4
> +#define GPU_THREAD_MAX_BARRIER_SIZE			0xA8
> +#define GPU_THREAD_FEATURES				0xAC
> +
> +#define GPU_TEXTURE_FEATURES(n)				(0xB0 + ((n) * 4))
> +
> +#define GPU_SHADER_PRESENT_LO				0x100
> +#define GPU_SHADER_PRESENT_HI				0x104
> +#define GPU_TILER_PRESENT_LO				0x110
> +#define GPU_TILER_PRESENT_HI				0x114
> +#define GPU_L2_PRESENT_LO				0x120
> +#define GPU_L2_PRESENT_HI				0x124
> +
> +#define SHADER_READY_LO					0x140
> +#define SHADER_READY_HI					0x144
> +#define TILER_READY_LO					0x150
> +#define TILER_READY_HI					0x154
> +#define L2_READY_LO					0x160
> +#define L2_READY_HI					0x164
> +
> +#define SHADER_PWRON_LO					0x180
> +#define SHADER_PWRON_HI					0x184
> +#define TILER_PWRON_LO					0x190
> +#define TILER_PWRON_HI					0x194
> +#define L2_PWRON_LO					0x1A0
> +#define L2_PWRON_HI					0x1A4
> +
> +#define SHADER_PWROFF_LO				0x1C0
> +#define SHADER_PWROFF_HI				0x1C4
> +#define TILER_PWROFF_LO					0x1D0
> +#define TILER_PWROFF_HI					0x1D4
> +#define L2_PWROFF_LO					0x1E0
> +#define L2_PWROFF_HI					0x1E4
> +
> +#define SHADER_PWRTRANS_LO				0x200
> +#define SHADER_PWRTRANS_HI				0x204
> +#define TILER_PWRTRANS_LO				0x210
> +#define TILER_PWRTRANS_HI				0x214
> +#define L2_PWRTRANS_LO					0x220
> +#define L2_PWRTRANS_HI					0x224
> +
> +#define SHADER_PWRACTIVE_LO				0x240
> +#define SHADER_PWRACTIVE_HI				0x244
> +#define TILER_PWRACTIVE_LO				0x250
> +#define TILER_PWRACTIVE_HI				0x254
> +#define L2_PWRACTIVE_LO					0x260
> +#define L2_PWRACTIVE_HI					0x264
> +
> +#define GPU_REVID					0x280
> +
> +#define GPU_COHERENCY_FEATURES				0x300
> +#define GPU_COHERENCY_PROT_BIT(name)			BIT(GPU_COHERENCY_  ## name)
> +
> +#define GPU_COHERENCY_PROTOCOL				0x304
> +#define   GPU_COHERENCY_ACE				0
> +#define   GPU_COHERENCY_ACE_LITE			1
> +#define   GPU_COHERENCY_NONE				31
> +
> +#define MCU_CONTROL					0x700
> +#define MCU_CONTROL_ENABLE				1
> +#define MCU_CONTROL_AUTO				2
> +#define MCU_CONTROL_DISABLE				0
> +
> +#define MCU_STATUS					0x704
> +#define MCU_STATUS_DISABLED				0
> +#define MCU_STATUS_ENABLED				1
> +#define MCU_STATUS_HALT					2
> +#define MCU_STATUS_FATAL				3
> +
> +/* Job Control regs */
> +#define JOB_INT_RAWSTAT					0x1000
> +#define JOB_INT_CLEAR					0x1004
> +#define JOB_INT_MASK					0x1008
> +#define JOB_INT_STAT					0x100c
> +#define   JOB_INT_GLOBAL_IF				BIT(31)
> +#define   JOB_INT_CSG_IF(x)				BIT(x)
> +
> +/* MMU regs */
> +#define MMU_INT_RAWSTAT					0x2000
> +#define MMU_INT_CLEAR					0x2004
> +#define MMU_INT_MASK					0x2008
> +#define MMU_INT_STAT					0x200c
> +
> +/* AS_COMMAND register commands */
> +
> +#define MMU_BASE					0x2400
> +#define MMU_AS_SHIFT					6
> +#define MMU_AS(as)					(MMU_BASE + ((as) << MMU_AS_SHIFT))
> +
> +#define AS_TRANSTAB_LO(as)				(MMU_AS(as) + 0x00)
> +#define AS_TRANSTAB_HI(as)				(MMU_AS(as) + 0x04)
> +#define AS_MEMATTR_LO(as)				(MMU_AS(as) + 0x08)
> +#define AS_MEMATTR_HI(as)				(MMU_AS(as) + 0x0C)
> +#define   AS_MEMATTR_AARCH64_INNER_ALLOC_IMPL		(2 << 2)
> +#define   AS_MEMATTR_AARCH64_INNER_ALLOC_EXPL(w, r)	((3 << 2) | \
> +							 ((w) ? BIT(0) : 0) | \
> +							 ((r) ? BIT(1) : 0))
> +#define   AS_MEMATTR_AARCH64_SH_MIDGARD_INNER		(0 << 4)
> +#define   AS_MEMATTR_AARCH64_SH_CPU_INNER		(1 << 4)
> +#define   AS_MEMATTR_AARCH64_SH_CPU_INNER_SHADER_COH	(2 << 4)
> +#define   AS_MEMATTR_AARCH64_SHARED			(0 << 6)
> +#define   AS_MEMATTR_AARCH64_INNER_OUTER_NC		(1 << 6)
> +#define   AS_MEMATTR_AARCH64_INNER_OUTER_WB		(2 << 6)
> +#define   AS_MEMATTR_AARCH64_FAULT			(3 << 6)
> +#define AS_LOCKADDR_LO(as)				(MMU_AS(as) + 0x10)
> +#define AS_LOCKADDR_HI(as)				(MMU_AS(as) + 0x14)
> +#define AS_COMMAND(as)					(MMU_AS(as) + 0x18)
> +#define   AS_COMMAND_NOP				0
> +#define   AS_COMMAND_UPDATE				1
> +#define   AS_COMMAND_LOCK				2
> +#define   AS_COMMAND_UNLOCK				3
> +#define   AS_COMMAND_FLUSH_PT				4
> +#define   AS_COMMAND_FLUSH_MEM				5
> +#define   AS_LOCK_REGION_MIN_SIZE			(1ULL << 15)
> +#define AS_FAULTSTATUS(as)				(MMU_AS(as) + 0x1C)
> +#define  AS_FAULTSTATUS_ACCESS_TYPE_MASK		(0x3 << 8)
> +#define  AS_FAULTSTATUS_ACCESS_TYPE_ATOMIC		(0x0 << 8)
> +#define  AS_FAULTSTATUS_ACCESS_TYPE_EX			(0x1 << 8)
> +#define  AS_FAULTSTATUS_ACCESS_TYPE_READ		(0x2 << 8)
> +#define  AS_FAULTSTATUS_ACCESS_TYPE_WRITE		(0x3 << 8)
> +#define AS_FAULTADDRESS_LO(as)				(MMU_AS(as) + 0x20)
> +#define AS_FAULTADDRESS_HI(as)				(MMU_AS(as) + 0x24)
> +#define AS_STATUS(as)					(MMU_AS(as) + 0x28)
> +#define   AS_STATUS_AS_ACTIVE				BIT(0)
> +#define AS_TRANSCFG_LO(as)				(MMU_AS(as) + 0x30)
> +#define AS_TRANSCFG_HI(as)				(MMU_AS(as) + 0x34)
> +#define   AS_TRANSCFG_ADRMODE_LEGACY			(0 << 0)

I don't believe legacy mode exists any more (it's not in my copy of the
spec).

> +#define   AS_TRANSCFG_ADRMODE_UNMAPPED			(1 << 0)
> +#define   AS_TRANSCFG_ADRMODE_IDENTITY			(2 << 0)
> +#define   AS_TRANSCFG_ADRMODE_AARCH64_4K		(6 << 0)
> +#define   AS_TRANSCFG_ADRMODE_AARCH64_64K		(8 << 0)
> +#define   AS_TRANSCFG_INA_BITS(x)			((x) << 6)
> +#define   AS_TRANSCFG_OUTA_BITS(x)			((x) << 14)
> +#define   AS_TRANSCFG_SL_CONCAT				BIT(22)
> +#define   AS_TRANSCFG_PTW_MEMATTR_NC			(1 << 24)
> +#define   AS_TRANSCFG_PTW_MEMATTR_WB			(2 << 24)
> +#define   AS_TRANSCFG_PTW_SH_NS				(0 << 28)
> +#define   AS_TRANSCFG_PTW_SH_OS				(2 << 28)
> +#define   AS_TRANSCFG_PTW_SH_IS				(3 << 28)
> +#define   AS_TRANSCFG_PTW_RA				BIT(30)
> +#define   AS_TRANSCFG_DISABLE_HIER_AP			BIT(33)
> +#define   AS_TRANSCFG_DISABLE_AF_FAULT			BIT(34)
> +#define   AS_TRANSCFG_WXN				BIT(35)
> +#define   AS_TRANSCFG_XREADABLE				BIT(36)
> +#define AS_FAULTEXTRA_LO(as)				(MMU_AS(as) + 0x38)
> +#define AS_FAULTEXTRA_HI(as)				(MMU_AS(as) + 0x3C)
> +
> +#define CSF_GPU_LATEST_FLUSH_ID				0x10000
> +#define CSF_GPU_LATEST_FLUSH_ID_DEFAULT			0xffffe0

I'm not sure why we need the default value of this register? Seems an
odd thing to include.

Steve

> +
> +#define CSF_DOORBELL(i)					(0x80000 + ((i) * 0x10000))
> +#define CSF_GLB_DOORBELL_ID				0
> +
> +#define gpu_write(dev, reg, data) \
> +	writel(data, (dev)->iomem + (reg))
> +
> +#define gpu_read(dev, reg) \
> +	readl((dev)->iomem + (reg))
> +
> +#endif




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