[Skiboot] [PATCH v5 2/7] vas: Define macros of constants and register fields

Thu May 11 09:37:48 AEST 2017

On Wed, 2017-01-25 at 17:32 -0800, Sukadev Bhattiprolu wrote:
> Define macros for the various Base Address Regions and Register fields
> that are needed by VAS.
> 
> Signed-off-by: Sukadev Bhattiprolu <sukadev at linux.vnet.ibm.com>
> ---
> Changelog[v4]:
> 	[Balbir Singh] Add a few missing abbreviations and fix up couple
> 		of macros for consistency.
> 	- Add VAS_WINDOWS_PER_CHIP
> 
> Changelog[v3]
> 	[Oliver O'Halloran] Fold vas.c and Makefile changes into next
> 		patch; remove unnecessary macros.
> ---
>  include/vas.h | 156
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 156 insertions(+)
>  create mode 100644 include/vas.h
> 
> diff --git a/include/vas.h b/include/vas.h
> new file mode 100644
> index 0000000..56e8a13
> --- /dev/null
> +++ b/include/vas.h
> @@ -0,0 +1,156 @@
> +/* Copyright 2013-2016 IBM Corp.
> + *
> + * Licensed under the Apache License, Version 2.0 (the "License");
> + * you may not use this file except in compliance with the License.
> + * You may obtain a copy of the License at
> + *
> + *	http://www.apache.org/licenses/LICENSE-2.0
> + *
> + * Unless required by applicable law or agreed to in writing, software
> + * distributed under the License is distributed on an "AS IS" BASIS,
> + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
> + * implied.
> + * See the License for the specific language governing permissions and
> + * limitations under the License.
> + */
> +
> +#ifndef __VAS_H
> +#define __VAS_H
> +
> +#include <xscom.h>
> +
> +/*
> + * Abbreviations used in VAS:
> + *	WC:	Window Context
> + *	WCM:	Window Context MMIO
> + *	HVWC:	Hypervisor Window Context
> + *	UWC:	OS/User Window Context
> + *	UWCM:	OS/User Window Context MMIO
> + *	WIDM:	Window ID MMIO
> + *	BAR:	Base Address Register
> + *	BAMR:	Base Address Mask Register
> + *	N (S):	North (South)
> + *	CONTS	Contents
> + *	FIR:	Fault Isolation Register
> + *	RMA:	Real Mode Addressing
> + *	CQ:	(Power Bus) Common Queue
> + */
> +
> +extern void vas_init(void);
> +
> +/*
> + * HVWC and UWC BAR.
> + *
> + * A Power node can have (upto?) 8 Power chips.
> + *
> + * There is one instance of VAS in each Power chip. Each instance of VAS
> + * has 64K windows, which can be used to send/receive messages from
> + * software threads and coprocessors.
> + *
> + * Each window is described by two types of window contexts:
> + *
> + *      Hypervisor Window Context (HVWC) of size VAS_HVWC_SIZE bytes
> + *      OS/User Window Context (UWC) of size VAS_UWC_SIZE bytes.
> + *
> + * A window context can be viewed as a set of 64-bit registers. The settings
> + * of these registers control/determine the behavior of the VAS hardware
> + * when messages are sent/received through the window.
> + *
> + * Each Power chip i.e each instance of VAS, is assigned two distinct ranges
> + * (one for each type of context) of Power-bus addresses (aka Base Address
> + * Region or BAR) which can be used to access the window contexts in that
> + * instance of VAS.
> + *
> + * From the Power9 MMIO Ranges Spreadsheet:
> + *
> + * The HVWC BAR is of size 0x40000000000. For chip 0, the HVWC BAR begins
> + * at 0x6019000000000ULL, for chip 1 at 0x0006059000000000 etc.
> + *
> + * i.e the HVWC for each of the 64K windows on chip 0 can be accessed at the
> + * address 0x6019000000000ULL, and HVWC for the 64K windows on chip 1 can be
> + * accessed at the address 0x0006059000000000 and so on.
> + *
> + * Similarly, the UWC BAR is also of size 0x40000000000. For chip 0, UWC BAR
> + * begins at 0x0006019100000000, for chip 1 at 0x0006059100000000 etc.
> + *
> + * Following macros specify the HVWC and UWC BARs for chip 0. The BARs for
> + * the other chips are computed in get_hvwc_mmio_bar() and
> get_uwc_mmio_bar().
> + */
> +#define VAS_HVWC_MMIO_BAR_BASE		0x0006019100000000ULL
> +#define VAS_HVWC_MMIO_BAR_SIZE		0x40000000000
> +
> +#define VAS_UWC_MMIO_BAR_BASE		0x0006019000000000ULL
> +#define VAS_UWC_MMIO_BAR_SIZE		0x40000000000

Now the phys map code is upstream in skiboot, you should remove this and use
phys_map_get() instead.

Mikey

> +
> +/* Window Context Backing Store Size */
> +#define VAS_WCBS_SIZE			0x800000        /* 8MB */
> +
> +/* Window context size of each window */
> +#define VAS_WC_SIZE			512
> +
> +#define VAS_WINDOWS_PER_CHIP		65536		/* 64K */
> +
> +/*
> + * SCOM Base Address from P9 SCOM Assignment spreadsheet
> + */
> +#define VAS_SCOM_BASE_ADDR		0x03011800
> +
> +/*
> + * NOTE: VAS_SCOM_BASE_ADDR (0x3011840) includes the SCOM ring of 6. So,
> + *	 setting the ring to 0 here.
> + *
> + *	 The satellite and offset values below are from "Table 3.1 VAS
> + *	 Internal Register Listing" of the P9 VAS Workbook.
> + */
> +#define VAS_P9_SAT(sat, offset)		XSCOM_SAT(0x0, sat, offset)
> +
> +#define VAS_FIR0			VAS_P9_SAT(0x0, 0x0)
> +#define VAS_FIR1			VAS_P9_SAT(0x0, 0x1)
> +#define VAS_FIR2			VAS_P9_SAT(0x0, 0x2)
> +#define VAS_FIR3			VAS_P9_SAT(0x0, 0x3)
> +#define VAS_FIR4			VAS_P9_SAT(0x0, 0x4)
> +#define VAS_FIR5			VAS_P9_SAT(0x0, 0x5)
> +#define VAS_FIR6			VAS_P9_SAT(0x0, 0x6)
> +#define VAS_FIR7			VAS_P9_SAT(0x0, 0x7)
> +
> +#define VAS_WCM_BAR			VAS_P9_SAT(0x0, 0xA)
> +#define VAS_UWCM_BAR			VAS_P9_SAT(0x0, 0xB)
> +#define VAS_BUF_CTL			VAS_P9_SAT(0x0, 0xC)
> +#define VAS_MISC_N_CTL			VAS_P9_SAT(0x0,	0xD)
> +#define VAS_RMA_BAR			VAS_P9_SAT(0x0, 0xE)
> +#define VAS_RMA_BAMR			VAS_P9_SAT(0x0, 0xF)
> +#define VAS_WIDM_CTL			VAS_P9_SAT(0x0, 0x29)
> +#define VAS_WIDM_DATA			VAS_P9_SAT(0x0, 0x2A)
> +#define VAS_IN_CERR_RPT_CONTS		VAS_P9_SAT(0x0, 0x2B)
> +#define VAS_RG_CERR_RPT_CONTS		VAS_P9_SAT(0x0, 0x2B)
> +#define VAS_WIDM_ECC			VAS_P9_SAT(0x0, 0x31)
> +
> +#define VAS_WCBS_BAR			VAS_P9_SAT(0x1, 0x0)
> +#define VAS_CQ_CERR_RPT_CONTS		VAS_P9_SAT(0x1, 0x8)
> +#define VAS_WC_CERR_RPT_CONTS		VAS_P9_SAT(0x1, 0x9)
> +#define VAS_EG_CERR_RPT_CONTS		VAS_P9_SAT(0x1, 0xA)
> +
> +#define VAS_PB_CFG0			VAS_P9_SAT(0x1, 0xD)
> +#define VAS_PB_CFG1			VAS_P9_SAT(0x1, 0xE)
> +#define VAS_MISC_S_CTL			VAS_P9_SAT(0x1,	0xF)
> +
> +#define VAS_BUF_CTL_FREE_COUNT		PPC_BITMASK(49:55)
> +#define VAS_BUF_CTL_USED_COUNT		PPC_BITMASK(57:63)
> +#define VAS_RMA_BAR_ADDR		PPC_BITMASK(8, 51)
> +#define VAS_RMA_BAMR_MASK		PPC_BITMASK(8, 51)
> +
> +/* Some VAS Miscellaneous Status and North Control Register bits. */
> +#define VAS_64K_MODE_MASK		PPC_BIT(0)
> +#define VAS_ACCEPT_PASTE_MASK		PPC_BIT(1)
> +#define VAS_QUIESCE_REQ_MASK		PPC_BIT(4)
> +#define VAS_HMI_ACTIVE_MASK		PPC_BIT(58)
> +#define VAS_RG_IDLE_MASK		PPC_BIT(59)
> +
> +/* Some PowerBus Configuration Register 0 Bits */
> +#define VAS_CQ_SCOM_HANG_POLL_MAX	PPC_BITMASK(7, 10)
> +#define VAS_CQ_SCOM_HANG_NX_MAX		PPC_BITMASK(15, 18)
> +
> +#define VAS_RMA_BAR_ADDR_MASK		PPC_BITMASK(8, 51)
> +#define VAS_RMA_BAMR_ADDR_MASK		PPC_BITMASK(8, 51)
> +
> +#endif