mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-06 02:24:14 +08:00
af84ca38af
Detects RIO link to the already enumerated device and properly sets links between device objects. Changes to the enumeration/discovery logic: 1. Use Master Enable bit to signal end of the enumeration - agents may start their discovery process as soon as they see this bit set (Component Tag register was used before for this purpose). 2. Enumerator sets Component Tag (!= 0) immediately during device setup. This allows to identify the device if the redundant route exists in a RIO system. Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com> Cc: Thomas Moll <thomas.moll@sysgo.com> Cc: Matt Porter <mporter@kernel.crashing.org> Cc: Li Yang <leoli@freescale.com> Cc: Kumar Gala <galak@kernel.crashing.org> Cc: Micha Nelissen <micha@neli.hopto.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1615 lines
44 KiB
C
1615 lines
44 KiB
C
/*
|
|
* Freescale MPC85xx/MPC86xx RapidIO support
|
|
*
|
|
* Copyright 2009 Sysgo AG
|
|
* Thomas Moll <thomas.moll@sysgo.com>
|
|
* - fixed maintenance access routines, check for aligned access
|
|
*
|
|
* Copyright 2009 Integrated Device Technology, Inc.
|
|
* Alex Bounine <alexandre.bounine@idt.com>
|
|
* - Added Port-Write message handling
|
|
* - Added Machine Check exception handling
|
|
*
|
|
* Copyright (C) 2007, 2008 Freescale Semiconductor, Inc.
|
|
* Zhang Wei <wei.zhang@freescale.com>
|
|
*
|
|
* Copyright 2005 MontaVista Software, Inc.
|
|
* Matt Porter <mporter@kernel.crashing.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/types.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/device.h>
|
|
#include <linux/rio.h>
|
|
#include <linux/rio_drv.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/kfifo.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/machdep.h>
|
|
#include <asm/uaccess.h>
|
|
|
|
#undef DEBUG_PW /* Port-Write debugging */
|
|
|
|
/* RapidIO definition irq, which read from OF-tree */
|
|
#define IRQ_RIO_BELL(m) (((struct rio_priv *)(m->priv))->bellirq)
|
|
#define IRQ_RIO_TX(m) (((struct rio_priv *)(m->priv))->txirq)
|
|
#define IRQ_RIO_RX(m) (((struct rio_priv *)(m->priv))->rxirq)
|
|
#define IRQ_RIO_PW(m) (((struct rio_priv *)(m->priv))->pwirq)
|
|
|
|
#define RIO_ATMU_REGS_OFFSET 0x10c00
|
|
#define RIO_P_MSG_REGS_OFFSET 0x11000
|
|
#define RIO_S_MSG_REGS_OFFSET 0x13000
|
|
#define RIO_GCCSR 0x13c
|
|
#define RIO_ESCSR 0x158
|
|
#define RIO_CCSR 0x15c
|
|
#define RIO_LTLEDCSR 0x0608
|
|
#define RIO_LTLEDCSR_IER 0x80000000
|
|
#define RIO_LTLEDCSR_PRT 0x01000000
|
|
#define RIO_LTLEECSR 0x060c
|
|
#define RIO_EPWISR 0x10010
|
|
#define RIO_ISR_AACR 0x10120
|
|
#define RIO_ISR_AACR_AA 0x1 /* Accept All ID */
|
|
#define RIO_MAINT_WIN_SIZE 0x400000
|
|
#define RIO_DBELL_WIN_SIZE 0x1000
|
|
|
|
#define RIO_MSG_OMR_MUI 0x00000002
|
|
#define RIO_MSG_OSR_TE 0x00000080
|
|
#define RIO_MSG_OSR_QOI 0x00000020
|
|
#define RIO_MSG_OSR_QFI 0x00000010
|
|
#define RIO_MSG_OSR_MUB 0x00000004
|
|
#define RIO_MSG_OSR_EOMI 0x00000002
|
|
#define RIO_MSG_OSR_QEI 0x00000001
|
|
|
|
#define RIO_MSG_IMR_MI 0x00000002
|
|
#define RIO_MSG_ISR_TE 0x00000080
|
|
#define RIO_MSG_ISR_QFI 0x00000010
|
|
#define RIO_MSG_ISR_DIQI 0x00000001
|
|
|
|
#define RIO_IPWMR_SEN 0x00100000
|
|
#define RIO_IPWMR_QFIE 0x00000100
|
|
#define RIO_IPWMR_EIE 0x00000020
|
|
#define RIO_IPWMR_CQ 0x00000002
|
|
#define RIO_IPWMR_PWE 0x00000001
|
|
|
|
#define RIO_IPWSR_QF 0x00100000
|
|
#define RIO_IPWSR_TE 0x00000080
|
|
#define RIO_IPWSR_QFI 0x00000010
|
|
#define RIO_IPWSR_PWD 0x00000008
|
|
#define RIO_IPWSR_PWB 0x00000004
|
|
|
|
#define RIO_EPWISR_PINT 0x80000000
|
|
#define RIO_EPWISR_PW 0x00000001
|
|
|
|
#define RIO_MSG_DESC_SIZE 32
|
|
#define RIO_MSG_BUFFER_SIZE 4096
|
|
#define RIO_MIN_TX_RING_SIZE 2
|
|
#define RIO_MAX_TX_RING_SIZE 2048
|
|
#define RIO_MIN_RX_RING_SIZE 2
|
|
#define RIO_MAX_RX_RING_SIZE 2048
|
|
|
|
#define DOORBELL_DMR_DI 0x00000002
|
|
#define DOORBELL_DSR_TE 0x00000080
|
|
#define DOORBELL_DSR_QFI 0x00000010
|
|
#define DOORBELL_DSR_DIQI 0x00000001
|
|
#define DOORBELL_TID_OFFSET 0x02
|
|
#define DOORBELL_SID_OFFSET 0x04
|
|
#define DOORBELL_INFO_OFFSET 0x06
|
|
|
|
#define DOORBELL_MESSAGE_SIZE 0x08
|
|
#define DBELL_SID(x) (*(u16 *)(x + DOORBELL_SID_OFFSET))
|
|
#define DBELL_TID(x) (*(u16 *)(x + DOORBELL_TID_OFFSET))
|
|
#define DBELL_INF(x) (*(u16 *)(x + DOORBELL_INFO_OFFSET))
|
|
|
|
struct rio_atmu_regs {
|
|
u32 rowtar;
|
|
u32 rowtear;
|
|
u32 rowbar;
|
|
u32 pad2;
|
|
u32 rowar;
|
|
u32 pad3[3];
|
|
};
|
|
|
|
struct rio_msg_regs {
|
|
u32 omr; /* 0xD_3000 - Outbound message 0 mode register */
|
|
u32 osr; /* 0xD_3004 - Outbound message 0 status register */
|
|
u32 pad1;
|
|
u32 odqdpar; /* 0xD_300C - Outbound message 0 descriptor queue
|
|
dequeue pointer address register */
|
|
u32 pad2;
|
|
u32 osar; /* 0xD_3014 - Outbound message 0 source address
|
|
register */
|
|
u32 odpr; /* 0xD_3018 - Outbound message 0 destination port
|
|
register */
|
|
u32 odatr; /* 0xD_301C - Outbound message 0 destination attributes
|
|
Register*/
|
|
u32 odcr; /* 0xD_3020 - Outbound message 0 double-word count
|
|
register */
|
|
u32 pad3;
|
|
u32 odqepar; /* 0xD_3028 - Outbound message 0 descriptor queue
|
|
enqueue pointer address register */
|
|
u32 pad4[13];
|
|
u32 imr; /* 0xD_3060 - Inbound message 0 mode register */
|
|
u32 isr; /* 0xD_3064 - Inbound message 0 status register */
|
|
u32 pad5;
|
|
u32 ifqdpar; /* 0xD_306C - Inbound message 0 frame queue dequeue
|
|
pointer address register*/
|
|
u32 pad6;
|
|
u32 ifqepar; /* 0xD_3074 - Inbound message 0 frame queue enqueue
|
|
pointer address register */
|
|
u32 pad7[226];
|
|
u32 odmr; /* 0xD_3400 - Outbound doorbell mode register */
|
|
u32 odsr; /* 0xD_3404 - Outbound doorbell status register */
|
|
u32 res0[4];
|
|
u32 oddpr; /* 0xD_3418 - Outbound doorbell destination port
|
|
register */
|
|
u32 oddatr; /* 0xD_341c - Outbound doorbell destination attributes
|
|
register */
|
|
u32 res1[3];
|
|
u32 odretcr; /* 0xD_342C - Outbound doorbell retry error threshold
|
|
configuration register */
|
|
u32 res2[12];
|
|
u32 dmr; /* 0xD_3460 - Inbound doorbell mode register */
|
|
u32 dsr; /* 0xD_3464 - Inbound doorbell status register */
|
|
u32 pad8;
|
|
u32 dqdpar; /* 0xD_346C - Inbound doorbell queue dequeue Pointer
|
|
address register */
|
|
u32 pad9;
|
|
u32 dqepar; /* 0xD_3474 - Inbound doorbell Queue enqueue pointer
|
|
address register */
|
|
u32 pad10[26];
|
|
u32 pwmr; /* 0xD_34E0 - Inbound port-write mode register */
|
|
u32 pwsr; /* 0xD_34E4 - Inbound port-write status register */
|
|
u32 epwqbar; /* 0xD_34E8 - Extended Port-Write Queue Base Address
|
|
register */
|
|
u32 pwqbar; /* 0xD_34EC - Inbound port-write queue base address
|
|
register */
|
|
};
|
|
|
|
struct rio_tx_desc {
|
|
u32 res1;
|
|
u32 saddr;
|
|
u32 dport;
|
|
u32 dattr;
|
|
u32 res2;
|
|
u32 res3;
|
|
u32 dwcnt;
|
|
u32 res4;
|
|
};
|
|
|
|
struct rio_dbell_ring {
|
|
void *virt;
|
|
dma_addr_t phys;
|
|
};
|
|
|
|
struct rio_msg_tx_ring {
|
|
void *virt;
|
|
dma_addr_t phys;
|
|
void *virt_buffer[RIO_MAX_TX_RING_SIZE];
|
|
dma_addr_t phys_buffer[RIO_MAX_TX_RING_SIZE];
|
|
int tx_slot;
|
|
int size;
|
|
void *dev_id;
|
|
};
|
|
|
|
struct rio_msg_rx_ring {
|
|
void *virt;
|
|
dma_addr_t phys;
|
|
void *virt_buffer[RIO_MAX_RX_RING_SIZE];
|
|
int rx_slot;
|
|
int size;
|
|
void *dev_id;
|
|
};
|
|
|
|
struct rio_port_write_msg {
|
|
void *virt;
|
|
dma_addr_t phys;
|
|
u32 msg_count;
|
|
u32 err_count;
|
|
u32 discard_count;
|
|
};
|
|
|
|
struct rio_priv {
|
|
struct device *dev;
|
|
void __iomem *regs_win;
|
|
struct rio_atmu_regs __iomem *atmu_regs;
|
|
struct rio_atmu_regs __iomem *maint_atmu_regs;
|
|
struct rio_atmu_regs __iomem *dbell_atmu_regs;
|
|
void __iomem *dbell_win;
|
|
void __iomem *maint_win;
|
|
struct rio_msg_regs __iomem *msg_regs;
|
|
struct rio_dbell_ring dbell_ring;
|
|
struct rio_msg_tx_ring msg_tx_ring;
|
|
struct rio_msg_rx_ring msg_rx_ring;
|
|
struct rio_port_write_msg port_write_msg;
|
|
int bellirq;
|
|
int txirq;
|
|
int rxirq;
|
|
int pwirq;
|
|
struct work_struct pw_work;
|
|
struct kfifo pw_fifo;
|
|
spinlock_t pw_fifo_lock;
|
|
};
|
|
|
|
#define __fsl_read_rio_config(x, addr, err, op) \
|
|
__asm__ __volatile__( \
|
|
"1: "op" %1,0(%2)\n" \
|
|
" eieio\n" \
|
|
"2:\n" \
|
|
".section .fixup,\"ax\"\n" \
|
|
"3: li %1,-1\n" \
|
|
" li %0,%3\n" \
|
|
" b 2b\n" \
|
|
".section __ex_table,\"a\"\n" \
|
|
" .align 2\n" \
|
|
" .long 1b,3b\n" \
|
|
".text" \
|
|
: "=r" (err), "=r" (x) \
|
|
: "b" (addr), "i" (-EFAULT), "0" (err))
|
|
|
|
static void __iomem *rio_regs_win;
|
|
|
|
#ifdef CONFIG_E500
|
|
static int (*saved_mcheck_exception)(struct pt_regs *regs);
|
|
|
|
static int fsl_rio_mcheck_exception(struct pt_regs *regs)
|
|
{
|
|
const struct exception_table_entry *entry = NULL;
|
|
unsigned long reason = mfspr(SPRN_MCSR);
|
|
|
|
if (reason & MCSR_BUS_RBERR) {
|
|
reason = in_be32((u32 *)(rio_regs_win + RIO_LTLEDCSR));
|
|
if (reason & (RIO_LTLEDCSR_IER | RIO_LTLEDCSR_PRT)) {
|
|
/* Check if we are prepared to handle this fault */
|
|
entry = search_exception_tables(regs->nip);
|
|
if (entry) {
|
|
pr_debug("RIO: %s - MC Exception handled\n",
|
|
__func__);
|
|
out_be32((u32 *)(rio_regs_win + RIO_LTLEDCSR),
|
|
0);
|
|
regs->msr |= MSR_RI;
|
|
regs->nip = entry->fixup;
|
|
return 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (saved_mcheck_exception)
|
|
return saved_mcheck_exception(regs);
|
|
else
|
|
return cur_cpu_spec->machine_check(regs);
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* fsl_rio_doorbell_send - Send a MPC85xx doorbell message
|
|
* @mport: RapidIO master port info
|
|
* @index: ID of RapidIO interface
|
|
* @destid: Destination ID of target device
|
|
* @data: 16-bit info field of RapidIO doorbell message
|
|
*
|
|
* Sends a MPC85xx doorbell message. Returns %0 on success or
|
|
* %-EINVAL on failure.
|
|
*/
|
|
static int fsl_rio_doorbell_send(struct rio_mport *mport,
|
|
int index, u16 destid, u16 data)
|
|
{
|
|
struct rio_priv *priv = mport->priv;
|
|
pr_debug("fsl_doorbell_send: index %d destid %4.4x data %4.4x\n",
|
|
index, destid, data);
|
|
switch (mport->phy_type) {
|
|
case RIO_PHY_PARALLEL:
|
|
out_be32(&priv->dbell_atmu_regs->rowtar, destid << 22);
|
|
out_be16(priv->dbell_win, data);
|
|
break;
|
|
case RIO_PHY_SERIAL:
|
|
/* In the serial version silicons, such as MPC8548, MPC8641,
|
|
* below operations is must be.
|
|
*/
|
|
out_be32(&priv->msg_regs->odmr, 0x00000000);
|
|
out_be32(&priv->msg_regs->odretcr, 0x00000004);
|
|
out_be32(&priv->msg_regs->oddpr, destid << 16);
|
|
out_be32(&priv->msg_regs->oddatr, data);
|
|
out_be32(&priv->msg_regs->odmr, 0x00000001);
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* fsl_local_config_read - Generate a MPC85xx local config space read
|
|
* @mport: RapidIO master port info
|
|
* @index: ID of RapdiIO interface
|
|
* @offset: Offset into configuration space
|
|
* @len: Length (in bytes) of the maintenance transaction
|
|
* @data: Value to be read into
|
|
*
|
|
* Generates a MPC85xx local configuration space read. Returns %0 on
|
|
* success or %-EINVAL on failure.
|
|
*/
|
|
static int fsl_local_config_read(struct rio_mport *mport,
|
|
int index, u32 offset, int len, u32 *data)
|
|
{
|
|
struct rio_priv *priv = mport->priv;
|
|
pr_debug("fsl_local_config_read: index %d offset %8.8x\n", index,
|
|
offset);
|
|
*data = in_be32(priv->regs_win + offset);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* fsl_local_config_write - Generate a MPC85xx local config space write
|
|
* @mport: RapidIO master port info
|
|
* @index: ID of RapdiIO interface
|
|
* @offset: Offset into configuration space
|
|
* @len: Length (in bytes) of the maintenance transaction
|
|
* @data: Value to be written
|
|
*
|
|
* Generates a MPC85xx local configuration space write. Returns %0 on
|
|
* success or %-EINVAL on failure.
|
|
*/
|
|
static int fsl_local_config_write(struct rio_mport *mport,
|
|
int index, u32 offset, int len, u32 data)
|
|
{
|
|
struct rio_priv *priv = mport->priv;
|
|
pr_debug
|
|
("fsl_local_config_write: index %d offset %8.8x data %8.8x\n",
|
|
index, offset, data);
|
|
out_be32(priv->regs_win + offset, data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* fsl_rio_config_read - Generate a MPC85xx read maintenance transaction
|
|
* @mport: RapidIO master port info
|
|
* @index: ID of RapdiIO interface
|
|
* @destid: Destination ID of transaction
|
|
* @hopcount: Number of hops to target device
|
|
* @offset: Offset into configuration space
|
|
* @len: Length (in bytes) of the maintenance transaction
|
|
* @val: Location to be read into
|
|
*
|
|
* Generates a MPC85xx read maintenance transaction. Returns %0 on
|
|
* success or %-EINVAL on failure.
|
|
*/
|
|
static int
|
|
fsl_rio_config_read(struct rio_mport *mport, int index, u16 destid,
|
|
u8 hopcount, u32 offset, int len, u32 *val)
|
|
{
|
|
struct rio_priv *priv = mport->priv;
|
|
u8 *data;
|
|
u32 rval, err = 0;
|
|
|
|
pr_debug
|
|
("fsl_rio_config_read: index %d destid %d hopcount %d offset %8.8x len %d\n",
|
|
index, destid, hopcount, offset, len);
|
|
|
|
/* 16MB maintenance window possible */
|
|
/* allow only aligned access to maintenance registers */
|
|
if (offset > (0x1000000 - len) || !IS_ALIGNED(offset, len))
|
|
return -EINVAL;
|
|
|
|
out_be32(&priv->maint_atmu_regs->rowtar,
|
|
(destid << 22) | (hopcount << 12) | (offset >> 12));
|
|
out_be32(&priv->maint_atmu_regs->rowtear, (destid >> 10));
|
|
|
|
data = (u8 *) priv->maint_win + (offset & (RIO_MAINT_WIN_SIZE - 1));
|
|
switch (len) {
|
|
case 1:
|
|
__fsl_read_rio_config(rval, data, err, "lbz");
|
|
break;
|
|
case 2:
|
|
__fsl_read_rio_config(rval, data, err, "lhz");
|
|
break;
|
|
case 4:
|
|
__fsl_read_rio_config(rval, data, err, "lwz");
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (err) {
|
|
pr_debug("RIO: cfg_read error %d for %x:%x:%x\n",
|
|
err, destid, hopcount, offset);
|
|
}
|
|
|
|
*val = rval;
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* fsl_rio_config_write - Generate a MPC85xx write maintenance transaction
|
|
* @mport: RapidIO master port info
|
|
* @index: ID of RapdiIO interface
|
|
* @destid: Destination ID of transaction
|
|
* @hopcount: Number of hops to target device
|
|
* @offset: Offset into configuration space
|
|
* @len: Length (in bytes) of the maintenance transaction
|
|
* @val: Value to be written
|
|
*
|
|
* Generates an MPC85xx write maintenance transaction. Returns %0 on
|
|
* success or %-EINVAL on failure.
|
|
*/
|
|
static int
|
|
fsl_rio_config_write(struct rio_mport *mport, int index, u16 destid,
|
|
u8 hopcount, u32 offset, int len, u32 val)
|
|
{
|
|
struct rio_priv *priv = mport->priv;
|
|
u8 *data;
|
|
pr_debug
|
|
("fsl_rio_config_write: index %d destid %d hopcount %d offset %8.8x len %d val %8.8x\n",
|
|
index, destid, hopcount, offset, len, val);
|
|
|
|
/* 16MB maintenance windows possible */
|
|
/* allow only aligned access to maintenance registers */
|
|
if (offset > (0x1000000 - len) || !IS_ALIGNED(offset, len))
|
|
return -EINVAL;
|
|
|
|
out_be32(&priv->maint_atmu_regs->rowtar,
|
|
(destid << 22) | (hopcount << 12) | (offset >> 12));
|
|
out_be32(&priv->maint_atmu_regs->rowtear, (destid >> 10));
|
|
|
|
data = (u8 *) priv->maint_win + (offset & (RIO_MAINT_WIN_SIZE - 1));
|
|
switch (len) {
|
|
case 1:
|
|
out_8((u8 *) data, val);
|
|
break;
|
|
case 2:
|
|
out_be16((u16 *) data, val);
|
|
break;
|
|
case 4:
|
|
out_be32((u32 *) data, val);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* rio_hw_add_outb_message - Add message to the MPC85xx outbound message queue
|
|
* @mport: Master port with outbound message queue
|
|
* @rdev: Target of outbound message
|
|
* @mbox: Outbound mailbox
|
|
* @buffer: Message to add to outbound queue
|
|
* @len: Length of message
|
|
*
|
|
* Adds the @buffer message to the MPC85xx outbound message queue. Returns
|
|
* %0 on success or %-EINVAL on failure.
|
|
*/
|
|
int
|
|
rio_hw_add_outb_message(struct rio_mport *mport, struct rio_dev *rdev, int mbox,
|
|
void *buffer, size_t len)
|
|
{
|
|
struct rio_priv *priv = mport->priv;
|
|
u32 omr;
|
|
struct rio_tx_desc *desc = (struct rio_tx_desc *)priv->msg_tx_ring.virt
|
|
+ priv->msg_tx_ring.tx_slot;
|
|
int ret = 0;
|
|
|
|
pr_debug
|
|
("RIO: rio_hw_add_outb_message(): destid %4.4x mbox %d buffer %8.8x len %8.8x\n",
|
|
rdev->destid, mbox, (int)buffer, len);
|
|
|
|
if ((len < 8) || (len > RIO_MAX_MSG_SIZE)) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/* Copy and clear rest of buffer */
|
|
memcpy(priv->msg_tx_ring.virt_buffer[priv->msg_tx_ring.tx_slot], buffer,
|
|
len);
|
|
if (len < (RIO_MAX_MSG_SIZE - 4))
|
|
memset(priv->msg_tx_ring.virt_buffer[priv->msg_tx_ring.tx_slot]
|
|
+ len, 0, RIO_MAX_MSG_SIZE - len);
|
|
|
|
switch (mport->phy_type) {
|
|
case RIO_PHY_PARALLEL:
|
|
/* Set mbox field for message */
|
|
desc->dport = mbox & 0x3;
|
|
|
|
/* Enable EOMI interrupt, set priority, and set destid */
|
|
desc->dattr = 0x28000000 | (rdev->destid << 2);
|
|
break;
|
|
case RIO_PHY_SERIAL:
|
|
/* Set mbox field for message, and set destid */
|
|
desc->dport = (rdev->destid << 16) | (mbox & 0x3);
|
|
|
|
/* Enable EOMI interrupt and priority */
|
|
desc->dattr = 0x28000000;
|
|
break;
|
|
}
|
|
|
|
/* Set transfer size aligned to next power of 2 (in double words) */
|
|
desc->dwcnt = is_power_of_2(len) ? len : 1 << get_bitmask_order(len);
|
|
|
|
/* Set snooping and source buffer address */
|
|
desc->saddr = 0x00000004
|
|
| priv->msg_tx_ring.phys_buffer[priv->msg_tx_ring.tx_slot];
|
|
|
|
/* Increment enqueue pointer */
|
|
omr = in_be32(&priv->msg_regs->omr);
|
|
out_be32(&priv->msg_regs->omr, omr | RIO_MSG_OMR_MUI);
|
|
|
|
/* Go to next descriptor */
|
|
if (++priv->msg_tx_ring.tx_slot == priv->msg_tx_ring.size)
|
|
priv->msg_tx_ring.tx_slot = 0;
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(rio_hw_add_outb_message);
|
|
|
|
/**
|
|
* fsl_rio_tx_handler - MPC85xx outbound message interrupt handler
|
|
* @irq: Linux interrupt number
|
|
* @dev_instance: Pointer to interrupt-specific data
|
|
*
|
|
* Handles outbound message interrupts. Executes a register outbound
|
|
* mailbox event handler and acks the interrupt occurrence.
|
|
*/
|
|
static irqreturn_t
|
|
fsl_rio_tx_handler(int irq, void *dev_instance)
|
|
{
|
|
int osr;
|
|
struct rio_mport *port = (struct rio_mport *)dev_instance;
|
|
struct rio_priv *priv = port->priv;
|
|
|
|
osr = in_be32(&priv->msg_regs->osr);
|
|
|
|
if (osr & RIO_MSG_OSR_TE) {
|
|
pr_info("RIO: outbound message transmission error\n");
|
|
out_be32(&priv->msg_regs->osr, RIO_MSG_OSR_TE);
|
|
goto out;
|
|
}
|
|
|
|
if (osr & RIO_MSG_OSR_QOI) {
|
|
pr_info("RIO: outbound message queue overflow\n");
|
|
out_be32(&priv->msg_regs->osr, RIO_MSG_OSR_QOI);
|
|
goto out;
|
|
}
|
|
|
|
if (osr & RIO_MSG_OSR_EOMI) {
|
|
u32 dqp = in_be32(&priv->msg_regs->odqdpar);
|
|
int slot = (dqp - priv->msg_tx_ring.phys) >> 5;
|
|
port->outb_msg[0].mcback(port, priv->msg_tx_ring.dev_id, -1,
|
|
slot);
|
|
|
|
/* Ack the end-of-message interrupt */
|
|
out_be32(&priv->msg_regs->osr, RIO_MSG_OSR_EOMI);
|
|
}
|
|
|
|
out:
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/**
|
|
* 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(priv->dev, 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(priv->dev,
|
|
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(priv->dev,
|
|
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(priv->dev,
|
|
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(priv->dev, 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(priv->dev,
|
|
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(priv->dev,
|
|
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(priv->dev, 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(priv->dev, 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(priv->dev, 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(priv->dev, 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;
|
|
}
|
|
|
|
/**
|
|
* fsl_rio_port_write_handler - MPC85xx port write interrupt handler
|
|
* @irq: Linux interrupt number
|
|
* @dev_instance: Pointer to interrupt-specific data
|
|
*
|
|
* Handles port write interrupts. Parses a list of registered
|
|
* port write event handlers and executes a matching event handler.
|
|
*/
|
|
static irqreturn_t
|
|
fsl_rio_port_write_handler(int irq, void *dev_instance)
|
|
{
|
|
u32 ipwmr, ipwsr;
|
|
struct rio_mport *port = (struct rio_mport *)dev_instance;
|
|
struct rio_priv *priv = port->priv;
|
|
u32 epwisr, tmp;
|
|
|
|
epwisr = in_be32(priv->regs_win + RIO_EPWISR);
|
|
if (!(epwisr & RIO_EPWISR_PW))
|
|
goto pw_done;
|
|
|
|
ipwmr = in_be32(&priv->msg_regs->pwmr);
|
|
ipwsr = in_be32(&priv->msg_regs->pwsr);
|
|
|
|
#ifdef DEBUG_PW
|
|
pr_debug("PW Int->IPWMR: 0x%08x IPWSR: 0x%08x (", ipwmr, ipwsr);
|
|
if (ipwsr & RIO_IPWSR_QF)
|
|
pr_debug(" QF");
|
|
if (ipwsr & RIO_IPWSR_TE)
|
|
pr_debug(" TE");
|
|
if (ipwsr & RIO_IPWSR_QFI)
|
|
pr_debug(" QFI");
|
|
if (ipwsr & RIO_IPWSR_PWD)
|
|
pr_debug(" PWD");
|
|
if (ipwsr & RIO_IPWSR_PWB)
|
|
pr_debug(" PWB");
|
|
pr_debug(" )\n");
|
|
#endif
|
|
/* Schedule deferred processing if PW was received */
|
|
if (ipwsr & RIO_IPWSR_QFI) {
|
|
/* Save PW message (if there is room in FIFO),
|
|
* otherwise discard it.
|
|
*/
|
|
if (kfifo_avail(&priv->pw_fifo) >= RIO_PW_MSG_SIZE) {
|
|
priv->port_write_msg.msg_count++;
|
|
kfifo_in(&priv->pw_fifo, priv->port_write_msg.virt,
|
|
RIO_PW_MSG_SIZE);
|
|
} else {
|
|
priv->port_write_msg.discard_count++;
|
|
pr_debug("RIO: ISR Discarded Port-Write Msg(s) (%d)\n",
|
|
priv->port_write_msg.discard_count);
|
|
}
|
|
/* Clear interrupt and issue Clear Queue command. This allows
|
|
* another port-write to be received.
|
|
*/
|
|
out_be32(&priv->msg_regs->pwsr, RIO_IPWSR_QFI);
|
|
out_be32(&priv->msg_regs->pwmr, ipwmr | RIO_IPWMR_CQ);
|
|
|
|
schedule_work(&priv->pw_work);
|
|
}
|
|
|
|
if ((ipwmr & RIO_IPWMR_EIE) && (ipwsr & RIO_IPWSR_TE)) {
|
|
priv->port_write_msg.err_count++;
|
|
pr_debug("RIO: Port-Write Transaction Err (%d)\n",
|
|
priv->port_write_msg.err_count);
|
|
/* Clear Transaction Error: port-write controller should be
|
|
* disabled when clearing this error
|
|
*/
|
|
out_be32(&priv->msg_regs->pwmr, ipwmr & ~RIO_IPWMR_PWE);
|
|
out_be32(&priv->msg_regs->pwsr, RIO_IPWSR_TE);
|
|
out_be32(&priv->msg_regs->pwmr, ipwmr);
|
|
}
|
|
|
|
if (ipwsr & RIO_IPWSR_PWD) {
|
|
priv->port_write_msg.discard_count++;
|
|
pr_debug("RIO: Port Discarded Port-Write Msg(s) (%d)\n",
|
|
priv->port_write_msg.discard_count);
|
|
out_be32(&priv->msg_regs->pwsr, RIO_IPWSR_PWD);
|
|
}
|
|
|
|
pw_done:
|
|
if (epwisr & RIO_EPWISR_PINT) {
|
|
tmp = in_be32(priv->regs_win + RIO_LTLEDCSR);
|
|
pr_debug("RIO_LTLEDCSR = 0x%x\n", tmp);
|
|
out_be32(priv->regs_win + RIO_LTLEDCSR, 0);
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static void fsl_pw_dpc(struct work_struct *work)
|
|
{
|
|
struct rio_priv *priv = container_of(work, struct rio_priv, pw_work);
|
|
unsigned long flags;
|
|
u32 msg_buffer[RIO_PW_MSG_SIZE/sizeof(u32)];
|
|
|
|
/*
|
|
* Process port-write messages
|
|
*/
|
|
spin_lock_irqsave(&priv->pw_fifo_lock, flags);
|
|
while (kfifo_out(&priv->pw_fifo, (unsigned char *)msg_buffer,
|
|
RIO_PW_MSG_SIZE)) {
|
|
/* Process one message */
|
|
spin_unlock_irqrestore(&priv->pw_fifo_lock, flags);
|
|
#ifdef DEBUG_PW
|
|
{
|
|
u32 i;
|
|
pr_debug("%s : Port-Write Message:", __func__);
|
|
for (i = 0; i < RIO_PW_MSG_SIZE/sizeof(u32); i++) {
|
|
if ((i%4) == 0)
|
|
pr_debug("\n0x%02x: 0x%08x", i*4,
|
|
msg_buffer[i]);
|
|
else
|
|
pr_debug(" 0x%08x", msg_buffer[i]);
|
|
}
|
|
pr_debug("\n");
|
|
}
|
|
#endif
|
|
/* Pass the port-write message to RIO core for processing */
|
|
rio_inb_pwrite_handler((union rio_pw_msg *)msg_buffer);
|
|
spin_lock_irqsave(&priv->pw_fifo_lock, flags);
|
|
}
|
|
spin_unlock_irqrestore(&priv->pw_fifo_lock, flags);
|
|
}
|
|
|
|
/**
|
|
* fsl_rio_pw_enable - enable/disable port-write interface init
|
|
* @mport: Master port implementing the port write unit
|
|
* @enable: 1=enable; 0=disable port-write message handling
|
|
*/
|
|
static int fsl_rio_pw_enable(struct rio_mport *mport, int enable)
|
|
{
|
|
struct rio_priv *priv = mport->priv;
|
|
u32 rval;
|
|
|
|
rval = in_be32(&priv->msg_regs->pwmr);
|
|
|
|
if (enable)
|
|
rval |= RIO_IPWMR_PWE;
|
|
else
|
|
rval &= ~RIO_IPWMR_PWE;
|
|
|
|
out_be32(&priv->msg_regs->pwmr, rval);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* fsl_rio_port_write_init - MPC85xx port write interface init
|
|
* @mport: Master port implementing the port write unit
|
|
*
|
|
* Initializes port write unit hardware and DMA buffer
|
|
* ring. Called from fsl_rio_setup(). Returns %0 on success
|
|
* or %-ENOMEM on failure.
|
|
*/
|
|
static int fsl_rio_port_write_init(struct rio_mport *mport)
|
|
{
|
|
struct rio_priv *priv = mport->priv;
|
|
int rc = 0;
|
|
|
|
/* Following configurations require a disabled port write controller */
|
|
out_be32(&priv->msg_regs->pwmr,
|
|
in_be32(&priv->msg_regs->pwmr) & ~RIO_IPWMR_PWE);
|
|
|
|
/* Initialize port write */
|
|
priv->port_write_msg.virt = dma_alloc_coherent(priv->dev,
|
|
RIO_PW_MSG_SIZE,
|
|
&priv->port_write_msg.phys, GFP_KERNEL);
|
|
if (!priv->port_write_msg.virt) {
|
|
pr_err("RIO: unable allocate port write queue\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
priv->port_write_msg.err_count = 0;
|
|
priv->port_write_msg.discard_count = 0;
|
|
|
|
/* Point dequeue/enqueue pointers at first entry */
|
|
out_be32(&priv->msg_regs->epwqbar, 0);
|
|
out_be32(&priv->msg_regs->pwqbar, (u32) priv->port_write_msg.phys);
|
|
|
|
pr_debug("EIPWQBAR: 0x%08x IPWQBAR: 0x%08x\n",
|
|
in_be32(&priv->msg_regs->epwqbar),
|
|
in_be32(&priv->msg_regs->pwqbar));
|
|
|
|
/* Clear interrupt status IPWSR */
|
|
out_be32(&priv->msg_regs->pwsr,
|
|
(RIO_IPWSR_TE | RIO_IPWSR_QFI | RIO_IPWSR_PWD));
|
|
|
|
/* Configure port write contoller for snooping enable all reporting,
|
|
clear queue full */
|
|
out_be32(&priv->msg_regs->pwmr,
|
|
RIO_IPWMR_SEN | RIO_IPWMR_QFIE | RIO_IPWMR_EIE | RIO_IPWMR_CQ);
|
|
|
|
|
|
/* Hook up port-write handler */
|
|
rc = request_irq(IRQ_RIO_PW(mport), fsl_rio_port_write_handler, 0,
|
|
"port-write", (void *)mport);
|
|
if (rc < 0) {
|
|
pr_err("MPC85xx RIO: unable to request inbound doorbell irq");
|
|
goto err_out;
|
|
}
|
|
|
|
INIT_WORK(&priv->pw_work, fsl_pw_dpc);
|
|
spin_lock_init(&priv->pw_fifo_lock);
|
|
if (kfifo_alloc(&priv->pw_fifo, RIO_PW_MSG_SIZE * 32, GFP_KERNEL)) {
|
|
pr_err("FIFO allocation failed\n");
|
|
rc = -ENOMEM;
|
|
goto err_out_irq;
|
|
}
|
|
|
|
pr_debug("IPWMR: 0x%08x IPWSR: 0x%08x\n",
|
|
in_be32(&priv->msg_regs->pwmr),
|
|
in_be32(&priv->msg_regs->pwsr));
|
|
|
|
return rc;
|
|
|
|
err_out_irq:
|
|
free_irq(IRQ_RIO_PW(mport), (void *)mport);
|
|
err_out:
|
|
dma_free_coherent(priv->dev, RIO_PW_MSG_SIZE,
|
|
priv->port_write_msg.virt,
|
|
priv->port_write_msg.phys);
|
|
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: platform_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 platform_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->dev.of_node) {
|
|
dev_err(&dev->dev, "Device OF-Node is NULL");
|
|
return -EFAULT;
|
|
}
|
|
|
|
rc = of_address_to_resource(dev->dev.of_node, 0, ®s);
|
|
if (rc) {
|
|
dev_err(&dev->dev, "Can't get %s property 'reg'\n",
|
|
dev->dev.of_node->full_name);
|
|
return -EFAULT;
|
|
}
|
|
dev_info(&dev->dev, "Of-device full name %s\n", dev->dev.of_node->full_name);
|
|
dev_info(&dev->dev, "Regs: %pR\n", ®s);
|
|
|
|
dt_range = of_get_property(dev->dev.of_node, "ranges", &rlen);
|
|
if (!dt_range) {
|
|
dev_err(&dev->dev, "Can't get %s property 'ranges'\n",
|
|
dev->dev.of_node->full_name);
|
|
return -EFAULT;
|
|
}
|
|
|
|
/* Get node address wide */
|
|
cell = of_get_property(dev->dev.of_node, "#address-cells", NULL);
|
|
if (cell)
|
|
aw = *cell;
|
|
else
|
|
aw = of_n_addr_cells(dev->dev.of_node);
|
|
/* Get node size wide */
|
|
cell = of_get_property(dev->dev.of_node, "#size-cells", NULL);
|
|
if (cell)
|
|
sw = *cell;
|
|
else
|
|
sw = of_n_size_cells(dev->dev.of_node);
|
|
/* Get parent address wide wide */
|
|
paw = of_n_addr_cells(dev->dev.of_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 = kzalloc(sizeof(struct rio_ops), GFP_KERNEL);
|
|
if (!ops) {
|
|
rc = -ENOMEM;
|
|
goto err_ops;
|
|
}
|
|
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;
|
|
ops->pwenable = fsl_rio_pw_enable;
|
|
|
|
port = kzalloc(sizeof(struct rio_mport), GFP_KERNEL);
|
|
if (!port) {
|
|
rc = -ENOMEM;
|
|
goto err_port;
|
|
}
|
|
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_priv;
|
|
}
|
|
|
|
INIT_LIST_HEAD(&port->dbells);
|
|
port->iores.start = law_start;
|
|
port->iores.end = law_start + law_size - 1;
|
|
port->iores.flags = IORESOURCE_MEM;
|
|
port->iores.name = "rio_io_win";
|
|
|
|
priv->pwirq = irq_of_parse_and_map(dev->dev.of_node, 0);
|
|
priv->bellirq = irq_of_parse_and_map(dev->dev.of_node, 2);
|
|
priv->txirq = irq_of_parse_and_map(dev->dev.of_node, 3);
|
|
priv->rxirq = irq_of_parse_and_map(dev->dev.of_node, 4);
|
|
dev_info(&dev->dev, "pwirq: %d, bellirq: %d, txirq: %d, rxirq %d\n",
|
|
priv->pwirq, 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");
|
|
|
|
priv->dev = &dev->dev;
|
|
|
|
port->ops = ops;
|
|
port->host_deviceid = fsl_rio_get_hdid(port->id);
|
|
|
|
port->priv = priv;
|
|
port->phys_efptr = 0x100;
|
|
rio_register_mport(port);
|
|
|
|
priv->regs_win = ioremap(regs.start, regs.end - regs.start + 1);
|
|
rio_regs_win = priv->regs_win;
|
|
|
|
/* 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);
|
|
|
|
if (port->host_deviceid >= 0)
|
|
out_be32(priv->regs_win + RIO_GCCSR, RIO_PORT_GEN_HOST |
|
|
RIO_PORT_GEN_MASTER | RIO_PORT_GEN_DISCOVERED);
|
|
else
|
|
out_be32(priv->regs_win + RIO_GCCSR, 0x00000000);
|
|
|
|
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, law_start >> 12);
|
|
out_be32(&priv->maint_atmu_regs->rowar,
|
|
0x80077000 | (ilog2(RIO_MAINT_WIN_SIZE) - 1));
|
|
|
|
priv->maint_win = ioremap(law_start, RIO_MAINT_WIN_SIZE);
|
|
|
|
/* Configure outbound doorbell window */
|
|
out_be32(&priv->dbell_atmu_regs->rowbar,
|
|
(law_start + RIO_MAINT_WIN_SIZE) >> 12);
|
|
out_be32(&priv->dbell_atmu_regs->rowar, 0x8004200b); /* 4k */
|
|
fsl_rio_doorbell_init(port);
|
|
fsl_rio_port_write_init(port);
|
|
|
|
#ifdef CONFIG_E500
|
|
saved_mcheck_exception = ppc_md.machine_check_exception;
|
|
ppc_md.machine_check_exception = fsl_rio_mcheck_exception;
|
|
#endif
|
|
/* Ensure that RFXE is set */
|
|
mtspr(SPRN_HID1, (mfspr(SPRN_HID1) | 0x20000));
|
|
|
|
return 0;
|
|
err:
|
|
iounmap(priv->regs_win);
|
|
kfree(priv);
|
|
err_priv:
|
|
kfree(port);
|
|
err_port:
|
|
kfree(ops);
|
|
err_ops:
|
|
return rc;
|
|
}
|
|
|
|
/* The probe function for RapidIO peer-to-peer network.
|
|
*/
|
|
static int __devinit fsl_of_rio_rpn_probe(struct platform_device *dev,
|
|
const struct of_device_id *match)
|
|
{
|
|
int rc;
|
|
printk(KERN_INFO "Setting up RapidIO peer-to-peer network %s\n",
|
|
dev->dev.of_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 = {
|
|
.driver = {
|
|
.name = "fsl-of-rio",
|
|
.owner = THIS_MODULE,
|
|
.of_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);
|