![Randy Dunlap](/assets/img/avatar_default.png)
Fix current (-git16) missing docbook/kernel-doc notation in RapidIO files. Warning(linux-2.6.25-git16//include/linux/rio.h:187): No description found for parameter 'sys_size' Warning(linux-2.6.25-git16//include/linux/rio.h:187): No description found for parameter 'phy_type' Warning(linux-2.6.25-git16//arch/powerpc/sysdev/fsl_rio.c:188): No description found for parameter 'mport' Warning(linux-2.6.25-git16//arch/powerpc/sysdev/fsl_rio.c:224): No description found for parameter 'mport' Warning(linux-2.6.25-git16//arch/powerpc/sysdev/fsl_rio.c:245): No description found for parameter 'mport' Warning(linux-2.6.25-git16//arch/powerpc/sysdev/fsl_rio.c:270): No description found for parameter 'mport' Warning(linux-2.6.25-git16//arch/powerpc/sysdev/fsl_rio.c:311): No description found for parameter 'mport' Warning(linux-2.6.25-git16//arch/powerpc/sysdev/fsl_rio.c:996): No description found for parameter 'dev' Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
1211 lines
32 KiB
C
1211 lines
32 KiB
C
/*
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* Freescale MPC85xx/MPC86xx RapidIO support
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*
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* Copyright (C) 2007, 2008 Freescale Semiconductor, Inc.
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* Zhang Wei <wei.zhang@freescale.com>
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*
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* Copyright 2005 MontaVista Software, Inc.
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* Matt Porter <mporter@kernel.crashing.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/dma-mapping.h>
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#include <linux/interrupt.h>
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#include <linux/rio.h>
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#include <linux/rio_drv.h>
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#include <linux/of_platform.h>
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#include <linux/delay.h>
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#include <asm/io.h>
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/* RapidIO definition irq, which read from OF-tree */
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#define IRQ_RIO_BELL(m) (((struct rio_priv *)(m->priv))->bellirq)
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#define IRQ_RIO_TX(m) (((struct rio_priv *)(m->priv))->txirq)
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#define IRQ_RIO_RX(m) (((struct rio_priv *)(m->priv))->rxirq)
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#define RIO_ATMU_REGS_OFFSET 0x10c00
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#define RIO_P_MSG_REGS_OFFSET 0x11000
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#define RIO_S_MSG_REGS_OFFSET 0x13000
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#define RIO_ESCSR 0x158
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#define RIO_CCSR 0x15c
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#define RIO_ISR_AACR 0x10120
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#define RIO_ISR_AACR_AA 0x1 /* Accept All ID */
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#define RIO_MAINT_WIN_SIZE 0x400000
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#define RIO_DBELL_WIN_SIZE 0x1000
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#define RIO_MSG_OMR_MUI 0x00000002
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#define RIO_MSG_OSR_TE 0x00000080
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#define RIO_MSG_OSR_QOI 0x00000020
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#define RIO_MSG_OSR_QFI 0x00000010
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#define RIO_MSG_OSR_MUB 0x00000004
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#define RIO_MSG_OSR_EOMI 0x00000002
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#define RIO_MSG_OSR_QEI 0x00000001
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#define RIO_MSG_IMR_MI 0x00000002
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#define RIO_MSG_ISR_TE 0x00000080
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#define RIO_MSG_ISR_QFI 0x00000010
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#define RIO_MSG_ISR_DIQI 0x00000001
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#define RIO_MSG_DESC_SIZE 32
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#define RIO_MSG_BUFFER_SIZE 4096
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#define RIO_MIN_TX_RING_SIZE 2
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#define RIO_MAX_TX_RING_SIZE 2048
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#define RIO_MIN_RX_RING_SIZE 2
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#define RIO_MAX_RX_RING_SIZE 2048
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#define DOORBELL_DMR_DI 0x00000002
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#define DOORBELL_DSR_TE 0x00000080
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#define DOORBELL_DSR_QFI 0x00000010
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#define DOORBELL_DSR_DIQI 0x00000001
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#define DOORBELL_TID_OFFSET 0x02
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#define DOORBELL_SID_OFFSET 0x04
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#define DOORBELL_INFO_OFFSET 0x06
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#define DOORBELL_MESSAGE_SIZE 0x08
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#define DBELL_SID(x) (*(u16 *)(x + DOORBELL_SID_OFFSET))
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#define DBELL_TID(x) (*(u16 *)(x + DOORBELL_TID_OFFSET))
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#define DBELL_INF(x) (*(u16 *)(x + DOORBELL_INFO_OFFSET))
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struct rio_atmu_regs {
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u32 rowtar;
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u32 rowtear;
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u32 rowbar;
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u32 pad2;
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u32 rowar;
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u32 pad3[3];
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};
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struct rio_msg_regs {
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u32 omr;
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u32 osr;
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u32 pad1;
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u32 odqdpar;
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u32 pad2;
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u32 osar;
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u32 odpr;
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u32 odatr;
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u32 odcr;
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u32 pad3;
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u32 odqepar;
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u32 pad4[13];
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u32 imr;
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u32 isr;
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u32 pad5;
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u32 ifqdpar;
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u32 pad6;
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u32 ifqepar;
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u32 pad7[226];
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u32 odmr;
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u32 odsr;
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u32 res0[4];
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u32 oddpr;
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u32 oddatr;
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u32 res1[3];
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u32 odretcr;
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u32 res2[12];
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u32 dmr;
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u32 dsr;
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u32 pad8;
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u32 dqdpar;
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u32 pad9;
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u32 dqepar;
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u32 pad10[26];
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u32 pwmr;
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u32 pwsr;
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u32 pad11;
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u32 pwqbar;
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};
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struct rio_tx_desc {
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u32 res1;
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u32 saddr;
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u32 dport;
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u32 dattr;
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u32 res2;
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u32 res3;
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u32 dwcnt;
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u32 res4;
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};
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struct rio_dbell_ring {
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void *virt;
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dma_addr_t phys;
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};
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struct rio_msg_tx_ring {
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void *virt;
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dma_addr_t phys;
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void *virt_buffer[RIO_MAX_TX_RING_SIZE];
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dma_addr_t phys_buffer[RIO_MAX_TX_RING_SIZE];
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int tx_slot;
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int size;
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void *dev_id;
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};
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struct rio_msg_rx_ring {
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void *virt;
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dma_addr_t phys;
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void *virt_buffer[RIO_MAX_RX_RING_SIZE];
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int rx_slot;
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int size;
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void *dev_id;
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};
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struct rio_priv {
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void __iomem *regs_win;
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struct rio_atmu_regs __iomem *atmu_regs;
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struct rio_atmu_regs __iomem *maint_atmu_regs;
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struct rio_atmu_regs __iomem *dbell_atmu_regs;
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void __iomem *dbell_win;
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void __iomem *maint_win;
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struct rio_msg_regs __iomem *msg_regs;
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struct rio_dbell_ring dbell_ring;
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struct rio_msg_tx_ring msg_tx_ring;
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struct rio_msg_rx_ring msg_rx_ring;
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int bellirq;
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int txirq;
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int rxirq;
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};
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/**
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* fsl_rio_doorbell_send - Send a MPC85xx doorbell message
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* @mport: RapidIO master port info
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* @index: ID of RapidIO interface
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* @destid: Destination ID of target device
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* @data: 16-bit info field of RapidIO doorbell message
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*
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* Sends a MPC85xx doorbell message. Returns %0 on success or
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* %-EINVAL on failure.
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*/
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static int fsl_rio_doorbell_send(struct rio_mport *mport,
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int index, u16 destid, u16 data)
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{
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struct rio_priv *priv = mport->priv;
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pr_debug("fsl_doorbell_send: index %d destid %4.4x data %4.4x\n",
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index, destid, data);
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switch (mport->phy_type) {
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case RIO_PHY_PARALLEL:
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out_be32(&priv->dbell_atmu_regs->rowtar, destid << 22);
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out_be16(priv->dbell_win, data);
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break;
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case RIO_PHY_SERIAL:
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/* In the serial version silicons, such as MPC8548, MPC8641,
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* below operations is must be.
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*/
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out_be32(&priv->msg_regs->odmr, 0x00000000);
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out_be32(&priv->msg_regs->odretcr, 0x00000004);
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out_be32(&priv->msg_regs->oddpr, destid << 16);
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out_be32(&priv->msg_regs->oddatr, data);
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out_be32(&priv->msg_regs->odmr, 0x00000001);
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break;
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}
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return 0;
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}
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/**
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* fsl_local_config_read - Generate a MPC85xx local config space read
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* @mport: RapidIO master port info
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* @index: ID of RapdiIO interface
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* @offset: Offset into configuration space
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* @len: Length (in bytes) of the maintenance transaction
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* @data: Value to be read into
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*
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* Generates a MPC85xx local configuration space read. Returns %0 on
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* success or %-EINVAL on failure.
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*/
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static int fsl_local_config_read(struct rio_mport *mport,
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int index, u32 offset, int len, u32 *data)
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{
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struct rio_priv *priv = mport->priv;
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pr_debug("fsl_local_config_read: index %d offset %8.8x\n", index,
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offset);
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*data = in_be32(priv->regs_win + offset);
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return 0;
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}
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/**
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* fsl_local_config_write - Generate a MPC85xx local config space write
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* @mport: RapidIO master port info
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* @index: ID of RapdiIO interface
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* @offset: Offset into configuration space
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* @len: Length (in bytes) of the maintenance transaction
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* @data: Value to be written
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*
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* Generates a MPC85xx local configuration space write. Returns %0 on
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* success or %-EINVAL on failure.
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*/
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static int fsl_local_config_write(struct rio_mport *mport,
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int index, u32 offset, int len, u32 data)
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{
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struct rio_priv *priv = mport->priv;
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pr_debug
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("fsl_local_config_write: index %d offset %8.8x data %8.8x\n",
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index, offset, data);
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out_be32(priv->regs_win + offset, data);
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return 0;
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}
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/**
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* fsl_rio_config_read - Generate a MPC85xx read maintenance transaction
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* @mport: RapidIO master port info
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* @index: ID of RapdiIO interface
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* @destid: Destination ID of transaction
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* @hopcount: Number of hops to target device
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* @offset: Offset into configuration space
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* @len: Length (in bytes) of the maintenance transaction
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* @val: Location to be read into
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*
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* Generates a MPC85xx read maintenance transaction. Returns %0 on
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* success or %-EINVAL on failure.
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*/
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static int
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fsl_rio_config_read(struct rio_mport *mport, int index, u16 destid,
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u8 hopcount, u32 offset, int len, u32 *val)
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{
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struct rio_priv *priv = mport->priv;
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u8 *data;
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pr_debug
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("fsl_rio_config_read: index %d destid %d hopcount %d offset %8.8x len %d\n",
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index, destid, hopcount, offset, len);
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out_be32(&priv->maint_atmu_regs->rowtar,
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(destid << 22) | (hopcount << 12) | ((offset & ~0x3) >> 9));
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data = (u8 *) priv->maint_win + offset;
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switch (len) {
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case 1:
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*val = in_8((u8 *) data);
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break;
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case 2:
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*val = in_be16((u16 *) data);
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break;
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default:
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*val = in_be32((u32 *) data);
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break;
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}
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return 0;
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}
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/**
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* fsl_rio_config_write - Generate a MPC85xx write maintenance transaction
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* @mport: RapidIO master port info
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* @index: ID of RapdiIO interface
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* @destid: Destination ID of transaction
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* @hopcount: Number of hops to target device
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* @offset: Offset into configuration space
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* @len: Length (in bytes) of the maintenance transaction
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* @val: Value to be written
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*
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* Generates an MPC85xx write maintenance transaction. Returns %0 on
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* success or %-EINVAL on failure.
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*/
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static int
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fsl_rio_config_write(struct rio_mport *mport, int index, u16 destid,
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u8 hopcount, u32 offset, int len, u32 val)
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{
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struct rio_priv *priv = mport->priv;
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u8 *data;
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pr_debug
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("fsl_rio_config_write: index %d destid %d hopcount %d offset %8.8x len %d val %8.8x\n",
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index, destid, hopcount, offset, len, val);
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out_be32(&priv->maint_atmu_regs->rowtar,
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(destid << 22) | (hopcount << 12) | ((offset & ~0x3) >> 9));
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data = (u8 *) priv->maint_win + offset;
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switch (len) {
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case 1:
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out_8((u8 *) data, val);
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break;
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case 2:
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out_be16((u16 *) data, val);
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break;
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default:
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out_be32((u32 *) data, val);
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break;
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}
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return 0;
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}
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/**
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* rio_hw_add_outb_message - Add message to the MPC85xx outbound message queue
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* @mport: Master port with outbound message queue
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* @rdev: Target of outbound message
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* @mbox: Outbound mailbox
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* @buffer: Message to add to outbound queue
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* @len: Length of message
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*
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* Adds the @buffer message to the MPC85xx outbound message queue. Returns
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* %0 on success or %-EINVAL on failure.
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*/
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int
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rio_hw_add_outb_message(struct rio_mport *mport, struct rio_dev *rdev, int mbox,
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void *buffer, size_t len)
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{
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struct rio_priv *priv = mport->priv;
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u32 omr;
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struct rio_tx_desc *desc = (struct rio_tx_desc *)priv->msg_tx_ring.virt
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+ priv->msg_tx_ring.tx_slot;
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int ret = 0;
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pr_debug
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("RIO: rio_hw_add_outb_message(): destid %4.4x mbox %d buffer %8.8x len %8.8x\n",
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rdev->destid, mbox, (int)buffer, len);
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if ((len < 8) || (len > RIO_MAX_MSG_SIZE)) {
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ret = -EINVAL;
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goto out;
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}
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/* Copy and clear rest of buffer */
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memcpy(priv->msg_tx_ring.virt_buffer[priv->msg_tx_ring.tx_slot], buffer,
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len);
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if (len < (RIO_MAX_MSG_SIZE - 4))
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memset(priv->msg_tx_ring.virt_buffer[priv->msg_tx_ring.tx_slot]
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+ len, 0, RIO_MAX_MSG_SIZE - len);
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switch (mport->phy_type) {
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case RIO_PHY_PARALLEL:
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/* Set mbox field for message */
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desc->dport = mbox & 0x3;
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/* Enable EOMI interrupt, set priority, and set destid */
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desc->dattr = 0x28000000 | (rdev->destid << 2);
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break;
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case RIO_PHY_SERIAL:
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/* Set mbox field for message, and set destid */
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desc->dport = (rdev->destid << 16) | (mbox & 0x3);
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/* Enable EOMI interrupt and priority */
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desc->dattr = 0x28000000;
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break;
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}
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/* Set transfer size aligned to next power of 2 (in double words) */
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desc->dwcnt = is_power_of_2(len) ? len : 1 << get_bitmask_order(len);
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/* Set snooping and source buffer address */
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desc->saddr = 0x00000004
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| priv->msg_tx_ring.phys_buffer[priv->msg_tx_ring.tx_slot];
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/* Increment enqueue pointer */
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omr = in_be32(&priv->msg_regs->omr);
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out_be32(&priv->msg_regs->omr, omr | RIO_MSG_OMR_MUI);
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/* Go to next descriptor */
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if (++priv->msg_tx_ring.tx_slot == priv->msg_tx_ring.size)
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priv->msg_tx_ring.tx_slot = 0;
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out:
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return ret;
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}
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EXPORT_SYMBOL_GPL(rio_hw_add_outb_message);
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/**
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* fsl_rio_tx_handler - MPC85xx outbound message interrupt handler
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* @irq: Linux interrupt number
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* @dev_instance: Pointer to interrupt-specific data
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*
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* Handles outbound message interrupts. Executes a register outbound
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* mailbox event handler and acks the interrupt occurrence.
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*/
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static irqreturn_t
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fsl_rio_tx_handler(int irq, void *dev_instance)
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{
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int osr;
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struct rio_mport *port = (struct rio_mport *)dev_instance;
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struct rio_priv *priv = port->priv;
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osr = in_be32(&priv->msg_regs->osr);
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if (osr & RIO_MSG_OSR_TE) {
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pr_info("RIO: outbound message transmission error\n");
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out_be32(&priv->msg_regs->osr, RIO_MSG_OSR_TE);
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goto out;
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}
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if (osr & RIO_MSG_OSR_QOI) {
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pr_info("RIO: outbound message queue overflow\n");
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out_be32(&priv->msg_regs->osr, RIO_MSG_OSR_QOI);
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goto out;
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}
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if (osr & RIO_MSG_OSR_EOMI) {
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u32 dqp = in_be32(&priv->msg_regs->odqdpar);
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int slot = (dqp - priv->msg_tx_ring.phys) >> 5;
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port->outb_msg[0].mcback(port, priv->msg_tx_ring.dev_id, -1,
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slot);
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/* Ack the end-of-message interrupt */
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out_be32(&priv->msg_regs->osr, RIO_MSG_OSR_EOMI);
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}
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out:
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return IRQ_HANDLED;
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}
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/**
|
|
* rio_open_outb_mbox - Initialize MPC85xx outbound mailbox
|
|
* @mport: Master port implementing the outbound message unit
|
|
* @dev_id: Device specific pointer to pass on event
|
|
* @mbox: Mailbox to open
|
|
* @entries: Number of entries in the outbound mailbox ring
|
|
*
|
|
* Initializes buffer ring, request the outbound message interrupt,
|
|
* and enables the outbound message unit. Returns %0 on success and
|
|
* %-EINVAL or %-ENOMEM on failure.
|
|
*/
|
|
int rio_open_outb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entries)
|
|
{
|
|
int i, j, rc = 0;
|
|
struct rio_priv *priv = mport->priv;
|
|
|
|
if ((entries < RIO_MIN_TX_RING_SIZE) ||
|
|
(entries > RIO_MAX_TX_RING_SIZE) || (!is_power_of_2(entries))) {
|
|
rc = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/* Initialize shadow copy ring */
|
|
priv->msg_tx_ring.dev_id = dev_id;
|
|
priv->msg_tx_ring.size = entries;
|
|
|
|
for (i = 0; i < priv->msg_tx_ring.size; i++) {
|
|
priv->msg_tx_ring.virt_buffer[i] =
|
|
dma_alloc_coherent(NULL, RIO_MSG_BUFFER_SIZE,
|
|
&priv->msg_tx_ring.phys_buffer[i], GFP_KERNEL);
|
|
if (!priv->msg_tx_ring.virt_buffer[i]) {
|
|
rc = -ENOMEM;
|
|
for (j = 0; j < priv->msg_tx_ring.size; j++)
|
|
if (priv->msg_tx_ring.virt_buffer[j])
|
|
dma_free_coherent(NULL,
|
|
RIO_MSG_BUFFER_SIZE,
|
|
priv->msg_tx_ring.
|
|
virt_buffer[j],
|
|
priv->msg_tx_ring.
|
|
phys_buffer[j]);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* Initialize outbound message descriptor ring */
|
|
priv->msg_tx_ring.virt = dma_alloc_coherent(NULL,
|
|
priv->msg_tx_ring.size * RIO_MSG_DESC_SIZE,
|
|
&priv->msg_tx_ring.phys, GFP_KERNEL);
|
|
if (!priv->msg_tx_ring.virt) {
|
|
rc = -ENOMEM;
|
|
goto out_dma;
|
|
}
|
|
memset(priv->msg_tx_ring.virt, 0,
|
|
priv->msg_tx_ring.size * RIO_MSG_DESC_SIZE);
|
|
priv->msg_tx_ring.tx_slot = 0;
|
|
|
|
/* Point dequeue/enqueue pointers at first entry in ring */
|
|
out_be32(&priv->msg_regs->odqdpar, priv->msg_tx_ring.phys);
|
|
out_be32(&priv->msg_regs->odqepar, priv->msg_tx_ring.phys);
|
|
|
|
/* Configure for snooping */
|
|
out_be32(&priv->msg_regs->osar, 0x00000004);
|
|
|
|
/* Clear interrupt status */
|
|
out_be32(&priv->msg_regs->osr, 0x000000b3);
|
|
|
|
/* Hook up outbound message handler */
|
|
rc = request_irq(IRQ_RIO_TX(mport), fsl_rio_tx_handler, 0,
|
|
"msg_tx", (void *)mport);
|
|
if (rc < 0)
|
|
goto out_irq;
|
|
|
|
/*
|
|
* Configure outbound message unit
|
|
* Snooping
|
|
* Interrupts (all enabled, except QEIE)
|
|
* Chaining mode
|
|
* Disable
|
|
*/
|
|
out_be32(&priv->msg_regs->omr, 0x00100220);
|
|
|
|
/* Set number of entries */
|
|
out_be32(&priv->msg_regs->omr,
|
|
in_be32(&priv->msg_regs->omr) |
|
|
((get_bitmask_order(entries) - 2) << 12));
|
|
|
|
/* Now enable the unit */
|
|
out_be32(&priv->msg_regs->omr, in_be32(&priv->msg_regs->omr) | 0x1);
|
|
|
|
out:
|
|
return rc;
|
|
|
|
out_irq:
|
|
dma_free_coherent(NULL, priv->msg_tx_ring.size * RIO_MSG_DESC_SIZE,
|
|
priv->msg_tx_ring.virt, priv->msg_tx_ring.phys);
|
|
|
|
out_dma:
|
|
for (i = 0; i < priv->msg_tx_ring.size; i++)
|
|
dma_free_coherent(NULL, RIO_MSG_BUFFER_SIZE,
|
|
priv->msg_tx_ring.virt_buffer[i],
|
|
priv->msg_tx_ring.phys_buffer[i]);
|
|
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* rio_close_outb_mbox - Shut down MPC85xx outbound mailbox
|
|
* @mport: Master port implementing the outbound message unit
|
|
* @mbox: Mailbox to close
|
|
*
|
|
* Disables the outbound message unit, free all buffers, and
|
|
* frees the outbound message interrupt.
|
|
*/
|
|
void rio_close_outb_mbox(struct rio_mport *mport, int mbox)
|
|
{
|
|
struct rio_priv *priv = mport->priv;
|
|
/* Disable inbound message unit */
|
|
out_be32(&priv->msg_regs->omr, 0);
|
|
|
|
/* Free ring */
|
|
dma_free_coherent(NULL, priv->msg_tx_ring.size * RIO_MSG_DESC_SIZE,
|
|
priv->msg_tx_ring.virt, priv->msg_tx_ring.phys);
|
|
|
|
/* Free interrupt */
|
|
free_irq(IRQ_RIO_TX(mport), (void *)mport);
|
|
}
|
|
|
|
/**
|
|
* fsl_rio_rx_handler - MPC85xx inbound message interrupt handler
|
|
* @irq: Linux interrupt number
|
|
* @dev_instance: Pointer to interrupt-specific data
|
|
*
|
|
* Handles inbound message interrupts. Executes a registered inbound
|
|
* mailbox event handler and acks the interrupt occurrence.
|
|
*/
|
|
static irqreturn_t
|
|
fsl_rio_rx_handler(int irq, void *dev_instance)
|
|
{
|
|
int isr;
|
|
struct rio_mport *port = (struct rio_mport *)dev_instance;
|
|
struct rio_priv *priv = port->priv;
|
|
|
|
isr = in_be32(&priv->msg_regs->isr);
|
|
|
|
if (isr & RIO_MSG_ISR_TE) {
|
|
pr_info("RIO: inbound message reception error\n");
|
|
out_be32((void *)&priv->msg_regs->isr, RIO_MSG_ISR_TE);
|
|
goto out;
|
|
}
|
|
|
|
/* XXX Need to check/dispatch until queue empty */
|
|
if (isr & RIO_MSG_ISR_DIQI) {
|
|
/*
|
|
* We implement *only* mailbox 0, but can receive messages
|
|
* for any mailbox/letter to that mailbox destination. So,
|
|
* make the callback with an unknown/invalid mailbox number
|
|
* argument.
|
|
*/
|
|
port->inb_msg[0].mcback(port, priv->msg_rx_ring.dev_id, -1, -1);
|
|
|
|
/* Ack the queueing interrupt */
|
|
out_be32(&priv->msg_regs->isr, RIO_MSG_ISR_DIQI);
|
|
}
|
|
|
|
out:
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/**
|
|
* rio_open_inb_mbox - Initialize MPC85xx inbound mailbox
|
|
* @mport: Master port implementing the inbound message unit
|
|
* @dev_id: Device specific pointer to pass on event
|
|
* @mbox: Mailbox to open
|
|
* @entries: Number of entries in the inbound mailbox ring
|
|
*
|
|
* Initializes buffer ring, request the inbound message interrupt,
|
|
* and enables the inbound message unit. Returns %0 on success
|
|
* and %-EINVAL or %-ENOMEM on failure.
|
|
*/
|
|
int rio_open_inb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entries)
|
|
{
|
|
int i, rc = 0;
|
|
struct rio_priv *priv = mport->priv;
|
|
|
|
if ((entries < RIO_MIN_RX_RING_SIZE) ||
|
|
(entries > RIO_MAX_RX_RING_SIZE) || (!is_power_of_2(entries))) {
|
|
rc = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/* Initialize client buffer ring */
|
|
priv->msg_rx_ring.dev_id = dev_id;
|
|
priv->msg_rx_ring.size = entries;
|
|
priv->msg_rx_ring.rx_slot = 0;
|
|
for (i = 0; i < priv->msg_rx_ring.size; i++)
|
|
priv->msg_rx_ring.virt_buffer[i] = NULL;
|
|
|
|
/* Initialize inbound message ring */
|
|
priv->msg_rx_ring.virt = dma_alloc_coherent(NULL,
|
|
priv->msg_rx_ring.size * RIO_MAX_MSG_SIZE,
|
|
&priv->msg_rx_ring.phys, GFP_KERNEL);
|
|
if (!priv->msg_rx_ring.virt) {
|
|
rc = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
/* Point dequeue/enqueue pointers at first entry in ring */
|
|
out_be32(&priv->msg_regs->ifqdpar, (u32) priv->msg_rx_ring.phys);
|
|
out_be32(&priv->msg_regs->ifqepar, (u32) priv->msg_rx_ring.phys);
|
|
|
|
/* Clear interrupt status */
|
|
out_be32(&priv->msg_regs->isr, 0x00000091);
|
|
|
|
/* Hook up inbound message handler */
|
|
rc = request_irq(IRQ_RIO_RX(mport), fsl_rio_rx_handler, 0,
|
|
"msg_rx", (void *)mport);
|
|
if (rc < 0) {
|
|
dma_free_coherent(NULL, RIO_MSG_BUFFER_SIZE,
|
|
priv->msg_tx_ring.virt_buffer[i],
|
|
priv->msg_tx_ring.phys_buffer[i]);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Configure inbound message unit:
|
|
* Snooping
|
|
* 4KB max message size
|
|
* Unmask all interrupt sources
|
|
* Disable
|
|
*/
|
|
out_be32(&priv->msg_regs->imr, 0x001b0060);
|
|
|
|
/* Set number of queue entries */
|
|
setbits32(&priv->msg_regs->imr, (get_bitmask_order(entries) - 2) << 12);
|
|
|
|
/* Now enable the unit */
|
|
setbits32(&priv->msg_regs->imr, 0x1);
|
|
|
|
out:
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* rio_close_inb_mbox - Shut down MPC85xx inbound mailbox
|
|
* @mport: Master port implementing the inbound message unit
|
|
* @mbox: Mailbox to close
|
|
*
|
|
* Disables the inbound message unit, free all buffers, and
|
|
* frees the inbound message interrupt.
|
|
*/
|
|
void rio_close_inb_mbox(struct rio_mport *mport, int mbox)
|
|
{
|
|
struct rio_priv *priv = mport->priv;
|
|
/* Disable inbound message unit */
|
|
out_be32(&priv->msg_regs->imr, 0);
|
|
|
|
/* Free ring */
|
|
dma_free_coherent(NULL, priv->msg_rx_ring.size * RIO_MAX_MSG_SIZE,
|
|
priv->msg_rx_ring.virt, priv->msg_rx_ring.phys);
|
|
|
|
/* Free interrupt */
|
|
free_irq(IRQ_RIO_RX(mport), (void *)mport);
|
|
}
|
|
|
|
/**
|
|
* rio_hw_add_inb_buffer - Add buffer to the MPC85xx inbound message queue
|
|
* @mport: Master port implementing the inbound message unit
|
|
* @mbox: Inbound mailbox number
|
|
* @buf: Buffer to add to inbound queue
|
|
*
|
|
* Adds the @buf buffer to the MPC85xx inbound message queue. Returns
|
|
* %0 on success or %-EINVAL on failure.
|
|
*/
|
|
int rio_hw_add_inb_buffer(struct rio_mport *mport, int mbox, void *buf)
|
|
{
|
|
int rc = 0;
|
|
struct rio_priv *priv = mport->priv;
|
|
|
|
pr_debug("RIO: rio_hw_add_inb_buffer(), msg_rx_ring.rx_slot %d\n",
|
|
priv->msg_rx_ring.rx_slot);
|
|
|
|
if (priv->msg_rx_ring.virt_buffer[priv->msg_rx_ring.rx_slot]) {
|
|
printk(KERN_ERR
|
|
"RIO: error adding inbound buffer %d, buffer exists\n",
|
|
priv->msg_rx_ring.rx_slot);
|
|
rc = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
priv->msg_rx_ring.virt_buffer[priv->msg_rx_ring.rx_slot] = buf;
|
|
if (++priv->msg_rx_ring.rx_slot == priv->msg_rx_ring.size)
|
|
priv->msg_rx_ring.rx_slot = 0;
|
|
|
|
out:
|
|
return rc;
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(rio_hw_add_inb_buffer);
|
|
|
|
/**
|
|
* rio_hw_get_inb_message - Fetch inbound message from the MPC85xx message unit
|
|
* @mport: Master port implementing the inbound message unit
|
|
* @mbox: Inbound mailbox number
|
|
*
|
|
* Gets the next available inbound message from the inbound message queue.
|
|
* A pointer to the message is returned on success or NULL on failure.
|
|
*/
|
|
void *rio_hw_get_inb_message(struct rio_mport *mport, int mbox)
|
|
{
|
|
struct rio_priv *priv = mport->priv;
|
|
u32 phys_buf, virt_buf;
|
|
void *buf = NULL;
|
|
int buf_idx;
|
|
|
|
phys_buf = in_be32(&priv->msg_regs->ifqdpar);
|
|
|
|
/* If no more messages, then bail out */
|
|
if (phys_buf == in_be32(&priv->msg_regs->ifqepar))
|
|
goto out2;
|
|
|
|
virt_buf = (u32) priv->msg_rx_ring.virt + (phys_buf
|
|
- priv->msg_rx_ring.phys);
|
|
buf_idx = (phys_buf - priv->msg_rx_ring.phys) / RIO_MAX_MSG_SIZE;
|
|
buf = priv->msg_rx_ring.virt_buffer[buf_idx];
|
|
|
|
if (!buf) {
|
|
printk(KERN_ERR
|
|
"RIO: inbound message copy failed, no buffers\n");
|
|
goto out1;
|
|
}
|
|
|
|
/* Copy max message size, caller is expected to allocate that big */
|
|
memcpy(buf, (void *)virt_buf, RIO_MAX_MSG_SIZE);
|
|
|
|
/* Clear the available buffer */
|
|
priv->msg_rx_ring.virt_buffer[buf_idx] = NULL;
|
|
|
|
out1:
|
|
setbits32(&priv->msg_regs->imr, RIO_MSG_IMR_MI);
|
|
|
|
out2:
|
|
return buf;
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(rio_hw_get_inb_message);
|
|
|
|
/**
|
|
* fsl_rio_dbell_handler - MPC85xx doorbell interrupt handler
|
|
* @irq: Linux interrupt number
|
|
* @dev_instance: Pointer to interrupt-specific data
|
|
*
|
|
* Handles doorbell interrupts. Parses a list of registered
|
|
* doorbell event handlers and executes a matching event handler.
|
|
*/
|
|
static irqreturn_t
|
|
fsl_rio_dbell_handler(int irq, void *dev_instance)
|
|
{
|
|
int dsr;
|
|
struct rio_mport *port = (struct rio_mport *)dev_instance;
|
|
struct rio_priv *priv = port->priv;
|
|
|
|
dsr = in_be32(&priv->msg_regs->dsr);
|
|
|
|
if (dsr & DOORBELL_DSR_TE) {
|
|
pr_info("RIO: doorbell reception error\n");
|
|
out_be32(&priv->msg_regs->dsr, DOORBELL_DSR_TE);
|
|
goto out;
|
|
}
|
|
|
|
if (dsr & DOORBELL_DSR_QFI) {
|
|
pr_info("RIO: doorbell queue full\n");
|
|
out_be32(&priv->msg_regs->dsr, DOORBELL_DSR_QFI);
|
|
goto out;
|
|
}
|
|
|
|
/* XXX Need to check/dispatch until queue empty */
|
|
if (dsr & DOORBELL_DSR_DIQI) {
|
|
u32 dmsg =
|
|
(u32) priv->dbell_ring.virt +
|
|
(in_be32(&priv->msg_regs->dqdpar) & 0xfff);
|
|
struct rio_dbell *dbell;
|
|
int found = 0;
|
|
|
|
pr_debug
|
|
("RIO: processing doorbell, sid %2.2x tid %2.2x info %4.4x\n",
|
|
DBELL_SID(dmsg), DBELL_TID(dmsg), DBELL_INF(dmsg));
|
|
|
|
list_for_each_entry(dbell, &port->dbells, node) {
|
|
if ((dbell->res->start <= DBELL_INF(dmsg)) &&
|
|
(dbell->res->end >= DBELL_INF(dmsg))) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (found) {
|
|
dbell->dinb(port, dbell->dev_id, DBELL_SID(dmsg), DBELL_TID(dmsg),
|
|
DBELL_INF(dmsg));
|
|
} else {
|
|
pr_debug
|
|
("RIO: spurious doorbell, sid %2.2x tid %2.2x info %4.4x\n",
|
|
DBELL_SID(dmsg), DBELL_TID(dmsg), DBELL_INF(dmsg));
|
|
}
|
|
setbits32(&priv->msg_regs->dmr, DOORBELL_DMR_DI);
|
|
out_be32(&priv->msg_regs->dsr, DOORBELL_DSR_DIQI);
|
|
}
|
|
|
|
out:
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/**
|
|
* fsl_rio_doorbell_init - MPC85xx doorbell interface init
|
|
* @mport: Master port implementing the inbound doorbell unit
|
|
*
|
|
* Initializes doorbell unit hardware and inbound DMA buffer
|
|
* ring. Called from fsl_rio_setup(). Returns %0 on success
|
|
* or %-ENOMEM on failure.
|
|
*/
|
|
static int fsl_rio_doorbell_init(struct rio_mport *mport)
|
|
{
|
|
struct rio_priv *priv = mport->priv;
|
|
int rc = 0;
|
|
|
|
/* Map outbound doorbell window immediately after maintenance window */
|
|
priv->dbell_win = ioremap(mport->iores.start + RIO_MAINT_WIN_SIZE,
|
|
RIO_DBELL_WIN_SIZE);
|
|
if (!priv->dbell_win) {
|
|
printk(KERN_ERR
|
|
"RIO: unable to map outbound doorbell window\n");
|
|
rc = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
/* Initialize inbound doorbells */
|
|
priv->dbell_ring.virt = dma_alloc_coherent(NULL, 512 *
|
|
DOORBELL_MESSAGE_SIZE, &priv->dbell_ring.phys, GFP_KERNEL);
|
|
if (!priv->dbell_ring.virt) {
|
|
printk(KERN_ERR "RIO: unable allocate inbound doorbell ring\n");
|
|
rc = -ENOMEM;
|
|
iounmap(priv->dbell_win);
|
|
goto out;
|
|
}
|
|
|
|
/* Point dequeue/enqueue pointers at first entry in ring */
|
|
out_be32(&priv->msg_regs->dqdpar, (u32) priv->dbell_ring.phys);
|
|
out_be32(&priv->msg_regs->dqepar, (u32) priv->dbell_ring.phys);
|
|
|
|
/* Clear interrupt status */
|
|
out_be32(&priv->msg_regs->dsr, 0x00000091);
|
|
|
|
/* Hook up doorbell handler */
|
|
rc = request_irq(IRQ_RIO_BELL(mport), fsl_rio_dbell_handler, 0,
|
|
"dbell_rx", (void *)mport);
|
|
if (rc < 0) {
|
|
iounmap(priv->dbell_win);
|
|
dma_free_coherent(NULL, 512 * DOORBELL_MESSAGE_SIZE,
|
|
priv->dbell_ring.virt, priv->dbell_ring.phys);
|
|
printk(KERN_ERR
|
|
"MPC85xx RIO: unable to request inbound doorbell irq");
|
|
goto out;
|
|
}
|
|
|
|
/* Configure doorbells for snooping, 512 entries, and enable */
|
|
out_be32(&priv->msg_regs->dmr, 0x00108161);
|
|
|
|
out:
|
|
return rc;
|
|
}
|
|
|
|
static char *cmdline = NULL;
|
|
|
|
static int fsl_rio_get_hdid(int index)
|
|
{
|
|
/* XXX Need to parse multiple entries in some format */
|
|
if (!cmdline)
|
|
return -1;
|
|
|
|
return simple_strtol(cmdline, NULL, 0);
|
|
}
|
|
|
|
static int fsl_rio_get_cmdline(char *s)
|
|
{
|
|
if (!s)
|
|
return 0;
|
|
|
|
cmdline = s;
|
|
return 1;
|
|
}
|
|
|
|
__setup("riohdid=", fsl_rio_get_cmdline);
|
|
|
|
static inline void fsl_rio_info(struct device *dev, u32 ccsr)
|
|
{
|
|
const char *str;
|
|
if (ccsr & 1) {
|
|
/* Serial phy */
|
|
switch (ccsr >> 30) {
|
|
case 0:
|
|
str = "1";
|
|
break;
|
|
case 1:
|
|
str = "4";
|
|
break;
|
|
default:
|
|
str = "Unknown";
|
|
break;;
|
|
}
|
|
dev_info(dev, "Hardware port width: %s\n", str);
|
|
|
|
switch ((ccsr >> 27) & 7) {
|
|
case 0:
|
|
str = "Single-lane 0";
|
|
break;
|
|
case 1:
|
|
str = "Single-lane 2";
|
|
break;
|
|
case 2:
|
|
str = "Four-lane";
|
|
break;
|
|
default:
|
|
str = "Unknown";
|
|
break;
|
|
}
|
|
dev_info(dev, "Training connection status: %s\n", str);
|
|
} else {
|
|
/* Parallel phy */
|
|
if (!(ccsr & 0x80000000))
|
|
dev_info(dev, "Output port operating in 8-bit mode\n");
|
|
if (!(ccsr & 0x08000000))
|
|
dev_info(dev, "Input port operating in 8-bit mode\n");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* fsl_rio_setup - Setup Freescale PowerPC RapidIO interface
|
|
* @dev: of_device pointer
|
|
*
|
|
* Initializes MPC85xx RapidIO hardware interface, configures
|
|
* master port with system-specific info, and registers the
|
|
* master port with the RapidIO subsystem.
|
|
*/
|
|
int fsl_rio_setup(struct of_device *dev)
|
|
{
|
|
struct rio_ops *ops;
|
|
struct rio_mport *port;
|
|
struct rio_priv *priv;
|
|
int rc = 0;
|
|
const u32 *dt_range, *cell;
|
|
struct resource regs;
|
|
int rlen;
|
|
u32 ccsr;
|
|
u64 law_start, law_size;
|
|
int paw, aw, sw;
|
|
|
|
if (!dev->node) {
|
|
dev_err(&dev->dev, "Device OF-Node is NULL");
|
|
return -EFAULT;
|
|
}
|
|
|
|
rc = of_address_to_resource(dev->node, 0, ®s);
|
|
if (rc) {
|
|
dev_err(&dev->dev, "Can't get %s property 'reg'\n",
|
|
dev->node->full_name);
|
|
return -EFAULT;
|
|
}
|
|
dev_info(&dev->dev, "Of-device full name %s\n", dev->node->full_name);
|
|
dev_info(&dev->dev, "Regs start 0x%08x size 0x%08x\n", regs.start,
|
|
regs.end - regs.start + 1);
|
|
|
|
dt_range = of_get_property(dev->node, "ranges", &rlen);
|
|
if (!dt_range) {
|
|
dev_err(&dev->dev, "Can't get %s property 'ranges'\n",
|
|
dev->node->full_name);
|
|
return -EFAULT;
|
|
}
|
|
|
|
/* Get node address wide */
|
|
cell = of_get_property(dev->node, "#address-cells", NULL);
|
|
if (cell)
|
|
aw = *cell;
|
|
else
|
|
aw = of_n_addr_cells(dev->node);
|
|
/* Get node size wide */
|
|
cell = of_get_property(dev->node, "#size-cells", NULL);
|
|
if (cell)
|
|
sw = *cell;
|
|
else
|
|
sw = of_n_size_cells(dev->node);
|
|
/* Get parent address wide wide */
|
|
paw = of_n_addr_cells(dev->node);
|
|
|
|
law_start = of_read_number(dt_range + aw, paw);
|
|
law_size = of_read_number(dt_range + aw + paw, sw);
|
|
|
|
dev_info(&dev->dev, "LAW start 0x%016llx, size 0x%016llx.\n",
|
|
law_start, law_size);
|
|
|
|
ops = kmalloc(sizeof(struct rio_ops), GFP_KERNEL);
|
|
ops->lcread = fsl_local_config_read;
|
|
ops->lcwrite = fsl_local_config_write;
|
|
ops->cread = fsl_rio_config_read;
|
|
ops->cwrite = fsl_rio_config_write;
|
|
ops->dsend = fsl_rio_doorbell_send;
|
|
|
|
port = kzalloc(sizeof(struct rio_mport), GFP_KERNEL);
|
|
port->id = 0;
|
|
port->index = 0;
|
|
|
|
priv = kzalloc(sizeof(struct rio_priv), GFP_KERNEL);
|
|
if (!priv) {
|
|
printk(KERN_ERR "Can't alloc memory for 'priv'\n");
|
|
rc = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
INIT_LIST_HEAD(&port->dbells);
|
|
port->iores.start = law_start;
|
|
port->iores.end = law_start + law_size;
|
|
port->iores.flags = IORESOURCE_MEM;
|
|
|
|
priv->bellirq = irq_of_parse_and_map(dev->node, 2);
|
|
priv->txirq = irq_of_parse_and_map(dev->node, 3);
|
|
priv->rxirq = irq_of_parse_and_map(dev->node, 4);
|
|
dev_info(&dev->dev, "bellirq: %d, txirq: %d, rxirq %d\n", priv->bellirq,
|
|
priv->txirq, priv->rxirq);
|
|
|
|
rio_init_dbell_res(&port->riores[RIO_DOORBELL_RESOURCE], 0, 0xffff);
|
|
rio_init_mbox_res(&port->riores[RIO_INB_MBOX_RESOURCE], 0, 0);
|
|
rio_init_mbox_res(&port->riores[RIO_OUTB_MBOX_RESOURCE], 0, 0);
|
|
strcpy(port->name, "RIO0 mport");
|
|
|
|
port->ops = ops;
|
|
port->host_deviceid = fsl_rio_get_hdid(port->id);
|
|
|
|
port->priv = priv;
|
|
rio_register_mport(port);
|
|
|
|
priv->regs_win = ioremap(regs.start, regs.end - regs.start + 1);
|
|
|
|
/* Probe the master port phy type */
|
|
ccsr = in_be32(priv->regs_win + RIO_CCSR);
|
|
port->phy_type = (ccsr & 1) ? RIO_PHY_SERIAL : RIO_PHY_PARALLEL;
|
|
dev_info(&dev->dev, "RapidIO PHY type: %s\n",
|
|
(port->phy_type == RIO_PHY_PARALLEL) ? "parallel" :
|
|
((port->phy_type == RIO_PHY_SERIAL) ? "serial" :
|
|
"unknown"));
|
|
/* Checking the port training status */
|
|
if (in_be32((priv->regs_win + RIO_ESCSR)) & 1) {
|
|
dev_err(&dev->dev, "Port is not ready. "
|
|
"Try to restart connection...\n");
|
|
switch (port->phy_type) {
|
|
case RIO_PHY_SERIAL:
|
|
/* Disable ports */
|
|
out_be32(priv->regs_win + RIO_CCSR, 0);
|
|
/* Set 1x lane */
|
|
setbits32(priv->regs_win + RIO_CCSR, 0x02000000);
|
|
/* Enable ports */
|
|
setbits32(priv->regs_win + RIO_CCSR, 0x00600000);
|
|
break;
|
|
case RIO_PHY_PARALLEL:
|
|
/* Disable ports */
|
|
out_be32(priv->regs_win + RIO_CCSR, 0x22000000);
|
|
/* Enable ports */
|
|
out_be32(priv->regs_win + RIO_CCSR, 0x44000000);
|
|
break;
|
|
}
|
|
msleep(100);
|
|
if (in_be32((priv->regs_win + RIO_ESCSR)) & 1) {
|
|
dev_err(&dev->dev, "Port restart failed.\n");
|
|
rc = -ENOLINK;
|
|
goto err;
|
|
}
|
|
dev_info(&dev->dev, "Port restart success!\n");
|
|
}
|
|
fsl_rio_info(&dev->dev, ccsr);
|
|
|
|
port->sys_size = (in_be32((priv->regs_win + RIO_PEF_CAR))
|
|
& RIO_PEF_CTLS) >> 4;
|
|
dev_info(&dev->dev, "RapidIO Common Transport System size: %d\n",
|
|
port->sys_size ? 65536 : 256);
|
|
|
|
priv->atmu_regs = (struct rio_atmu_regs *)(priv->regs_win
|
|
+ RIO_ATMU_REGS_OFFSET);
|
|
priv->maint_atmu_regs = priv->atmu_regs + 1;
|
|
priv->dbell_atmu_regs = priv->atmu_regs + 2;
|
|
priv->msg_regs = (struct rio_msg_regs *)(priv->regs_win +
|
|
((port->phy_type == RIO_PHY_SERIAL) ?
|
|
RIO_S_MSG_REGS_OFFSET : RIO_P_MSG_REGS_OFFSET));
|
|
|
|
/* Set to receive any dist ID for serial RapidIO controller. */
|
|
if (port->phy_type == RIO_PHY_SERIAL)
|
|
out_be32((priv->regs_win + RIO_ISR_AACR), RIO_ISR_AACR_AA);
|
|
|
|
/* Configure maintenance transaction window */
|
|
out_be32(&priv->maint_atmu_regs->rowbar, 0x000c0000);
|
|
out_be32(&priv->maint_atmu_regs->rowar, 0x80077015);
|
|
|
|
priv->maint_win = ioremap(law_start, RIO_MAINT_WIN_SIZE);
|
|
|
|
/* Configure outbound doorbell window */
|
|
out_be32(&priv->dbell_atmu_regs->rowbar, 0x000c0400);
|
|
out_be32(&priv->dbell_atmu_regs->rowar, 0x8004200b);
|
|
fsl_rio_doorbell_init(port);
|
|
|
|
return 0;
|
|
err:
|
|
if (priv)
|
|
iounmap(priv->regs_win);
|
|
kfree(ops);
|
|
kfree(priv);
|
|
kfree(port);
|
|
return rc;
|
|
}
|
|
|
|
/* The probe function for RapidIO peer-to-peer network.
|
|
*/
|
|
static int __devinit fsl_of_rio_rpn_probe(struct of_device *dev,
|
|
const struct of_device_id *match)
|
|
{
|
|
int rc;
|
|
printk(KERN_INFO "Setting up RapidIO peer-to-peer network %s\n",
|
|
dev->node->full_name);
|
|
|
|
rc = fsl_rio_setup(dev);
|
|
if (rc)
|
|
goto out;
|
|
|
|
/* Enumerate all registered ports */
|
|
rc = rio_init_mports();
|
|
out:
|
|
return rc;
|
|
};
|
|
|
|
static const struct of_device_id fsl_of_rio_rpn_ids[] = {
|
|
{
|
|
.compatible = "fsl,rapidio-delta",
|
|
},
|
|
{},
|
|
};
|
|
|
|
static struct of_platform_driver fsl_of_rio_rpn_driver = {
|
|
.name = "fsl-of-rio",
|
|
.match_table = fsl_of_rio_rpn_ids,
|
|
.probe = fsl_of_rio_rpn_probe,
|
|
};
|
|
|
|
static __init int fsl_of_rio_rpn_init(void)
|
|
{
|
|
return of_register_platform_driver(&fsl_of_rio_rpn_driver);
|
|
}
|
|
|
|
subsys_initcall(fsl_of_rio_rpn_init);
|