16ec4bedbSLiu Gang /* 26ec4bedbSLiu Gang * Freescale MPC85xx/MPC86xx RapidIO RMU support 36ec4bedbSLiu Gang * 46ec4bedbSLiu Gang * Copyright 2009 Sysgo AG 56ec4bedbSLiu Gang * Thomas Moll <thomas.moll@sysgo.com> 66ec4bedbSLiu Gang * - fixed maintenance access routines, check for aligned access 76ec4bedbSLiu Gang * 86ec4bedbSLiu Gang * Copyright 2009 Integrated Device Technology, Inc. 96ec4bedbSLiu Gang * Alex Bounine <alexandre.bounine@idt.com> 106ec4bedbSLiu Gang * - Added Port-Write message handling 116ec4bedbSLiu Gang * - Added Machine Check exception handling 126ec4bedbSLiu Gang * 136ec4bedbSLiu Gang * Copyright (C) 2007, 2008, 2010, 2011 Freescale Semiconductor, Inc. 146ec4bedbSLiu Gang * Zhang Wei <wei.zhang@freescale.com> 156ec4bedbSLiu Gang * Lian Minghuan-B31939 <Minghuan.Lian@freescale.com> 166ec4bedbSLiu Gang * Liu Gang <Gang.Liu@freescale.com> 176ec4bedbSLiu Gang * 186ec4bedbSLiu Gang * Copyright 2005 MontaVista Software, Inc. 196ec4bedbSLiu Gang * Matt Porter <mporter@kernel.crashing.org> 206ec4bedbSLiu Gang * 216ec4bedbSLiu Gang * This program is free software; you can redistribute it and/or modify it 226ec4bedbSLiu Gang * under the terms of the GNU General Public License as published by the 236ec4bedbSLiu Gang * Free Software Foundation; either version 2 of the License, or (at your 246ec4bedbSLiu Gang * option) any later version. 256ec4bedbSLiu Gang */ 266ec4bedbSLiu Gang 276ec4bedbSLiu Gang #include <linux/types.h> 286ec4bedbSLiu Gang #include <linux/dma-mapping.h> 296ec4bedbSLiu Gang #include <linux/interrupt.h> 306ec4bedbSLiu Gang #include <linux/of_platform.h> 316ec4bedbSLiu Gang #include <linux/slab.h> 326ec4bedbSLiu Gang 336ec4bedbSLiu Gang #include "fsl_rio.h" 346ec4bedbSLiu Gang 356ec4bedbSLiu Gang #define GET_RMM_HANDLE(mport) \ 366ec4bedbSLiu Gang (((struct rio_priv *)(mport->priv))->rmm_handle) 376ec4bedbSLiu Gang 386ec4bedbSLiu Gang /* RapidIO definition irq, which read from OF-tree */ 39abc3aeaeSLiu Gang #define IRQ_RIO_PW(m) (((struct fsl_rio_pw *)(m))->pwirq) 40abc3aeaeSLiu Gang #define IRQ_RIO_BELL(m) (((struct fsl_rio_dbell *)(m))->bellirq) 416ec4bedbSLiu Gang #define IRQ_RIO_TX(m) (((struct fsl_rmu *)(GET_RMM_HANDLE(m)))->txirq) 426ec4bedbSLiu Gang #define IRQ_RIO_RX(m) (((struct fsl_rmu *)(GET_RMM_HANDLE(m)))->rxirq) 436ec4bedbSLiu Gang 446ec4bedbSLiu Gang #define RIO_MIN_TX_RING_SIZE 2 456ec4bedbSLiu Gang #define RIO_MAX_TX_RING_SIZE 2048 466ec4bedbSLiu Gang #define RIO_MIN_RX_RING_SIZE 2 476ec4bedbSLiu Gang #define RIO_MAX_RX_RING_SIZE 2048 486ec4bedbSLiu Gang 496ec4bedbSLiu Gang #define RIO_IPWMR_SEN 0x00100000 506ec4bedbSLiu Gang #define RIO_IPWMR_QFIE 0x00000100 516ec4bedbSLiu Gang #define RIO_IPWMR_EIE 0x00000020 526ec4bedbSLiu Gang #define RIO_IPWMR_CQ 0x00000002 536ec4bedbSLiu Gang #define RIO_IPWMR_PWE 0x00000001 546ec4bedbSLiu Gang 556ec4bedbSLiu Gang #define RIO_IPWSR_QF 0x00100000 566ec4bedbSLiu Gang #define RIO_IPWSR_TE 0x00000080 576ec4bedbSLiu Gang #define RIO_IPWSR_QFI 0x00000010 586ec4bedbSLiu Gang #define RIO_IPWSR_PWD 0x00000008 596ec4bedbSLiu Gang #define RIO_IPWSR_PWB 0x00000004 606ec4bedbSLiu Gang 616ec4bedbSLiu Gang #define RIO_EPWISR 0x10010 626ec4bedbSLiu Gang /* EPWISR Error match value */ 636ec4bedbSLiu Gang #define RIO_EPWISR_PINT1 0x80000000 646ec4bedbSLiu Gang #define RIO_EPWISR_PINT2 0x40000000 656ec4bedbSLiu Gang #define RIO_EPWISR_MU 0x00000002 666ec4bedbSLiu Gang #define RIO_EPWISR_PW 0x00000001 676ec4bedbSLiu Gang 686ec4bedbSLiu Gang #define IPWSR_CLEAR 0x98 696ec4bedbSLiu Gang #define OMSR_CLEAR 0x1cb3 706ec4bedbSLiu Gang #define IMSR_CLEAR 0x491 716ec4bedbSLiu Gang #define IDSR_CLEAR 0x91 726ec4bedbSLiu Gang #define ODSR_CLEAR 0x1c00 736ec4bedbSLiu Gang #define LTLEECSR_ENABLE_ALL 0xFFC000FC 746ec4bedbSLiu Gang #define RIO_LTLEECSR 0x060c 756ec4bedbSLiu Gang 76abc3aeaeSLiu Gang #define RIO_IM0SR 0x64 77abc3aeaeSLiu Gang #define RIO_IM1SR 0x164 78abc3aeaeSLiu Gang #define RIO_OM0SR 0x4 79abc3aeaeSLiu Gang #define RIO_OM1SR 0x104 806ec4bedbSLiu Gang 816ec4bedbSLiu Gang #define RIO_DBELL_WIN_SIZE 0x1000 826ec4bedbSLiu Gang 836ec4bedbSLiu Gang #define RIO_MSG_OMR_MUI 0x00000002 846ec4bedbSLiu Gang #define RIO_MSG_OSR_TE 0x00000080 856ec4bedbSLiu Gang #define RIO_MSG_OSR_QOI 0x00000020 866ec4bedbSLiu Gang #define RIO_MSG_OSR_QFI 0x00000010 876ec4bedbSLiu Gang #define RIO_MSG_OSR_MUB 0x00000004 886ec4bedbSLiu Gang #define RIO_MSG_OSR_EOMI 0x00000002 896ec4bedbSLiu Gang #define RIO_MSG_OSR_QEI 0x00000001 906ec4bedbSLiu Gang 916ec4bedbSLiu Gang #define RIO_MSG_IMR_MI 0x00000002 926ec4bedbSLiu Gang #define RIO_MSG_ISR_TE 0x00000080 936ec4bedbSLiu Gang #define RIO_MSG_ISR_QFI 0x00000010 946ec4bedbSLiu Gang #define RIO_MSG_ISR_DIQI 0x00000001 956ec4bedbSLiu Gang 966ec4bedbSLiu Gang #define RIO_MSG_DESC_SIZE 32 976ec4bedbSLiu Gang #define RIO_MSG_BUFFER_SIZE 4096 986ec4bedbSLiu Gang 996ec4bedbSLiu Gang #define DOORBELL_DMR_DI 0x00000002 1006ec4bedbSLiu Gang #define DOORBELL_DSR_TE 0x00000080 1016ec4bedbSLiu Gang #define DOORBELL_DSR_QFI 0x00000010 1026ec4bedbSLiu Gang #define DOORBELL_DSR_DIQI 0x00000001 1036ec4bedbSLiu Gang 1046ec4bedbSLiu Gang #define DOORBELL_MESSAGE_SIZE 0x08 1056ec4bedbSLiu Gang 1066ec4bedbSLiu Gang struct rio_msg_regs { 107abc3aeaeSLiu Gang u32 omr; 108abc3aeaeSLiu Gang u32 osr; 1096ec4bedbSLiu Gang u32 pad1; 110abc3aeaeSLiu Gang u32 odqdpar; 1116ec4bedbSLiu Gang u32 pad2; 112abc3aeaeSLiu Gang u32 osar; 113abc3aeaeSLiu Gang u32 odpr; 114abc3aeaeSLiu Gang u32 odatr; 115abc3aeaeSLiu Gang u32 odcr; 1166ec4bedbSLiu Gang u32 pad3; 117abc3aeaeSLiu Gang u32 odqepar; 1186ec4bedbSLiu Gang u32 pad4[13]; 119abc3aeaeSLiu Gang u32 imr; 120abc3aeaeSLiu Gang u32 isr; 1216ec4bedbSLiu Gang u32 pad5; 122abc3aeaeSLiu Gang u32 ifqdpar; 1236ec4bedbSLiu Gang u32 pad6; 124abc3aeaeSLiu Gang u32 ifqepar; 1256ec4bedbSLiu Gang }; 1266ec4bedbSLiu Gang 127abc3aeaeSLiu Gang struct rio_dbell_regs { 128abc3aeaeSLiu Gang u32 odmr; 129abc3aeaeSLiu Gang u32 odsr; 130abc3aeaeSLiu Gang u32 pad1[4]; 131abc3aeaeSLiu Gang u32 oddpr; 132abc3aeaeSLiu Gang u32 oddatr; 133abc3aeaeSLiu Gang u32 pad2[3]; 134abc3aeaeSLiu Gang u32 odretcr; 135abc3aeaeSLiu Gang u32 pad3[12]; 136abc3aeaeSLiu Gang u32 dmr; 137abc3aeaeSLiu Gang u32 dsr; 138abc3aeaeSLiu Gang u32 pad4; 139abc3aeaeSLiu Gang u32 dqdpar; 140abc3aeaeSLiu Gang u32 pad5; 141abc3aeaeSLiu Gang u32 dqepar; 142abc3aeaeSLiu Gang }; 143abc3aeaeSLiu Gang 144abc3aeaeSLiu Gang struct rio_pw_regs { 145abc3aeaeSLiu Gang u32 pwmr; 146abc3aeaeSLiu Gang u32 pwsr; 147abc3aeaeSLiu Gang u32 epwqbar; 148abc3aeaeSLiu Gang u32 pwqbar; 149abc3aeaeSLiu Gang }; 150abc3aeaeSLiu Gang 151abc3aeaeSLiu Gang 1526ec4bedbSLiu Gang struct rio_tx_desc { 153abc3aeaeSLiu Gang u32 pad1; 1546ec4bedbSLiu Gang u32 saddr; 1556ec4bedbSLiu Gang u32 dport; 1566ec4bedbSLiu Gang u32 dattr; 157abc3aeaeSLiu Gang u32 pad2; 158abc3aeaeSLiu Gang u32 pad3; 1596ec4bedbSLiu Gang u32 dwcnt; 160abc3aeaeSLiu Gang u32 pad4; 1616ec4bedbSLiu Gang }; 1626ec4bedbSLiu Gang 1636ec4bedbSLiu Gang struct rio_msg_tx_ring { 1646ec4bedbSLiu Gang void *virt; 1656ec4bedbSLiu Gang dma_addr_t phys; 1666ec4bedbSLiu Gang void *virt_buffer[RIO_MAX_TX_RING_SIZE]; 1676ec4bedbSLiu Gang dma_addr_t phys_buffer[RIO_MAX_TX_RING_SIZE]; 1686ec4bedbSLiu Gang int tx_slot; 1696ec4bedbSLiu Gang int size; 1706ec4bedbSLiu Gang void *dev_id; 1716ec4bedbSLiu Gang }; 1726ec4bedbSLiu Gang 1736ec4bedbSLiu Gang struct rio_msg_rx_ring { 1746ec4bedbSLiu Gang void *virt; 1756ec4bedbSLiu Gang dma_addr_t phys; 1766ec4bedbSLiu Gang void *virt_buffer[RIO_MAX_RX_RING_SIZE]; 1776ec4bedbSLiu Gang int rx_slot; 1786ec4bedbSLiu Gang int size; 1796ec4bedbSLiu Gang void *dev_id; 1806ec4bedbSLiu Gang }; 1816ec4bedbSLiu Gang 1826ec4bedbSLiu Gang struct fsl_rmu { 1836ec4bedbSLiu Gang struct rio_msg_regs __iomem *msg_regs; 1846ec4bedbSLiu Gang struct rio_msg_tx_ring msg_tx_ring; 1856ec4bedbSLiu Gang struct rio_msg_rx_ring msg_rx_ring; 1866ec4bedbSLiu Gang int txirq; 1876ec4bedbSLiu Gang int rxirq; 1886ec4bedbSLiu Gang }; 1896ec4bedbSLiu Gang 190*2a2383daSLiu Gang struct rio_dbell_msg { 191*2a2383daSLiu Gang u16 pad1; 192*2a2383daSLiu Gang u16 tid; 193*2a2383daSLiu Gang u16 sid; 194*2a2383daSLiu Gang u16 info; 195*2a2383daSLiu Gang }; 196*2a2383daSLiu Gang 1976ec4bedbSLiu Gang /** 1986ec4bedbSLiu Gang * fsl_rio_tx_handler - MPC85xx outbound message interrupt handler 1996ec4bedbSLiu Gang * @irq: Linux interrupt number 2006ec4bedbSLiu Gang * @dev_instance: Pointer to interrupt-specific data 2016ec4bedbSLiu Gang * 2026ec4bedbSLiu Gang * Handles outbound message interrupts. Executes a register outbound 2036ec4bedbSLiu Gang * mailbox event handler and acks the interrupt occurrence. 2046ec4bedbSLiu Gang */ 2056ec4bedbSLiu Gang static irqreturn_t 2066ec4bedbSLiu Gang fsl_rio_tx_handler(int irq, void *dev_instance) 2076ec4bedbSLiu Gang { 2086ec4bedbSLiu Gang int osr; 2096ec4bedbSLiu Gang struct rio_mport *port = (struct rio_mport *)dev_instance; 2106ec4bedbSLiu Gang struct fsl_rmu *rmu = GET_RMM_HANDLE(port); 2116ec4bedbSLiu Gang 2126ec4bedbSLiu Gang osr = in_be32(&rmu->msg_regs->osr); 2136ec4bedbSLiu Gang 2146ec4bedbSLiu Gang if (osr & RIO_MSG_OSR_TE) { 2156ec4bedbSLiu Gang pr_info("RIO: outbound message transmission error\n"); 2166ec4bedbSLiu Gang out_be32(&rmu->msg_regs->osr, RIO_MSG_OSR_TE); 2176ec4bedbSLiu Gang goto out; 2186ec4bedbSLiu Gang } 2196ec4bedbSLiu Gang 2206ec4bedbSLiu Gang if (osr & RIO_MSG_OSR_QOI) { 2216ec4bedbSLiu Gang pr_info("RIO: outbound message queue overflow\n"); 2226ec4bedbSLiu Gang out_be32(&rmu->msg_regs->osr, RIO_MSG_OSR_QOI); 2236ec4bedbSLiu Gang goto out; 2246ec4bedbSLiu Gang } 2256ec4bedbSLiu Gang 2266ec4bedbSLiu Gang if (osr & RIO_MSG_OSR_EOMI) { 2276ec4bedbSLiu Gang u32 dqp = in_be32(&rmu->msg_regs->odqdpar); 2286ec4bedbSLiu Gang int slot = (dqp - rmu->msg_tx_ring.phys) >> 5; 229abc3aeaeSLiu Gang if (port->outb_msg[0].mcback != NULL) { 230abc3aeaeSLiu Gang port->outb_msg[0].mcback(port, rmu->msg_tx_ring.dev_id, 231abc3aeaeSLiu Gang -1, 2326ec4bedbSLiu Gang slot); 233abc3aeaeSLiu Gang } 2346ec4bedbSLiu Gang /* Ack the end-of-message interrupt */ 2356ec4bedbSLiu Gang out_be32(&rmu->msg_regs->osr, RIO_MSG_OSR_EOMI); 2366ec4bedbSLiu Gang } 2376ec4bedbSLiu Gang 2386ec4bedbSLiu Gang out: 2396ec4bedbSLiu Gang return IRQ_HANDLED; 2406ec4bedbSLiu Gang } 2416ec4bedbSLiu Gang 2426ec4bedbSLiu Gang /** 2436ec4bedbSLiu Gang * fsl_rio_rx_handler - MPC85xx inbound message interrupt handler 2446ec4bedbSLiu Gang * @irq: Linux interrupt number 2456ec4bedbSLiu Gang * @dev_instance: Pointer to interrupt-specific data 2466ec4bedbSLiu Gang * 2476ec4bedbSLiu Gang * Handles inbound message interrupts. Executes a registered inbound 2486ec4bedbSLiu Gang * mailbox event handler and acks the interrupt occurrence. 2496ec4bedbSLiu Gang */ 2506ec4bedbSLiu Gang static irqreturn_t 2516ec4bedbSLiu Gang fsl_rio_rx_handler(int irq, void *dev_instance) 2526ec4bedbSLiu Gang { 2536ec4bedbSLiu Gang int isr; 2546ec4bedbSLiu Gang struct rio_mport *port = (struct rio_mport *)dev_instance; 2556ec4bedbSLiu Gang struct fsl_rmu *rmu = GET_RMM_HANDLE(port); 2566ec4bedbSLiu Gang 2576ec4bedbSLiu Gang isr = in_be32(&rmu->msg_regs->isr); 2586ec4bedbSLiu Gang 2596ec4bedbSLiu Gang if (isr & RIO_MSG_ISR_TE) { 2606ec4bedbSLiu Gang pr_info("RIO: inbound message reception error\n"); 2616ec4bedbSLiu Gang out_be32((void *)&rmu->msg_regs->isr, RIO_MSG_ISR_TE); 2626ec4bedbSLiu Gang goto out; 2636ec4bedbSLiu Gang } 2646ec4bedbSLiu Gang 2656ec4bedbSLiu Gang /* XXX Need to check/dispatch until queue empty */ 2666ec4bedbSLiu Gang if (isr & RIO_MSG_ISR_DIQI) { 2676ec4bedbSLiu Gang /* 268abc3aeaeSLiu Gang * Can receive messages for any mailbox/letter to that 269abc3aeaeSLiu Gang * mailbox destination. So, make the callback with an 270abc3aeaeSLiu Gang * unknown/invalid mailbox number argument. 2716ec4bedbSLiu Gang */ 272abc3aeaeSLiu Gang if (port->inb_msg[0].mcback != NULL) 273abc3aeaeSLiu Gang port->inb_msg[0].mcback(port, rmu->msg_rx_ring.dev_id, 274abc3aeaeSLiu Gang -1, 275abc3aeaeSLiu Gang -1); 2766ec4bedbSLiu Gang 2776ec4bedbSLiu Gang /* Ack the queueing interrupt */ 2786ec4bedbSLiu Gang out_be32(&rmu->msg_regs->isr, RIO_MSG_ISR_DIQI); 2796ec4bedbSLiu Gang } 2806ec4bedbSLiu Gang 2816ec4bedbSLiu Gang out: 2826ec4bedbSLiu Gang return IRQ_HANDLED; 2836ec4bedbSLiu Gang } 2846ec4bedbSLiu Gang 2856ec4bedbSLiu Gang /** 2866ec4bedbSLiu Gang * fsl_rio_dbell_handler - MPC85xx doorbell interrupt handler 2876ec4bedbSLiu Gang * @irq: Linux interrupt number 2886ec4bedbSLiu Gang * @dev_instance: Pointer to interrupt-specific data 2896ec4bedbSLiu Gang * 2906ec4bedbSLiu Gang * Handles doorbell interrupts. Parses a list of registered 2916ec4bedbSLiu Gang * doorbell event handlers and executes a matching event handler. 2926ec4bedbSLiu Gang */ 2936ec4bedbSLiu Gang static irqreturn_t 2946ec4bedbSLiu Gang fsl_rio_dbell_handler(int irq, void *dev_instance) 2956ec4bedbSLiu Gang { 2966ec4bedbSLiu Gang int dsr; 297abc3aeaeSLiu Gang struct fsl_rio_dbell *fsl_dbell = (struct fsl_rio_dbell *)dev_instance; 298abc3aeaeSLiu Gang int i; 2996ec4bedbSLiu Gang 300abc3aeaeSLiu Gang dsr = in_be32(&fsl_dbell->dbell_regs->dsr); 3016ec4bedbSLiu Gang 3026ec4bedbSLiu Gang if (dsr & DOORBELL_DSR_TE) { 3036ec4bedbSLiu Gang pr_info("RIO: doorbell reception error\n"); 304abc3aeaeSLiu Gang out_be32(&fsl_dbell->dbell_regs->dsr, DOORBELL_DSR_TE); 3056ec4bedbSLiu Gang goto out; 3066ec4bedbSLiu Gang } 3076ec4bedbSLiu Gang 3086ec4bedbSLiu Gang if (dsr & DOORBELL_DSR_QFI) { 3096ec4bedbSLiu Gang pr_info("RIO: doorbell queue full\n"); 310abc3aeaeSLiu Gang out_be32(&fsl_dbell->dbell_regs->dsr, DOORBELL_DSR_QFI); 3116ec4bedbSLiu Gang } 3126ec4bedbSLiu Gang 3136ec4bedbSLiu Gang /* XXX Need to check/dispatch until queue empty */ 3146ec4bedbSLiu Gang if (dsr & DOORBELL_DSR_DIQI) { 315*2a2383daSLiu Gang struct rio_dbell_msg *dmsg = 316*2a2383daSLiu Gang fsl_dbell->dbell_ring.virt + 317abc3aeaeSLiu Gang (in_be32(&fsl_dbell->dbell_regs->dqdpar) & 0xfff); 3186ec4bedbSLiu Gang struct rio_dbell *dbell; 3196ec4bedbSLiu Gang int found = 0; 3206ec4bedbSLiu Gang 3216ec4bedbSLiu Gang pr_debug 3226ec4bedbSLiu Gang ("RIO: processing doorbell," 3236ec4bedbSLiu Gang " sid %2.2x tid %2.2x info %4.4x\n", 324*2a2383daSLiu Gang dmsg->sid, dmsg->tid, dmsg->info); 3256ec4bedbSLiu Gang 326abc3aeaeSLiu Gang for (i = 0; i < MAX_PORT_NUM; i++) { 327abc3aeaeSLiu Gang if (fsl_dbell->mport[i]) { 328abc3aeaeSLiu Gang list_for_each_entry(dbell, 329abc3aeaeSLiu Gang &fsl_dbell->mport[i]->dbells, node) { 330abc3aeaeSLiu Gang if ((dbell->res->start 331*2a2383daSLiu Gang <= dmsg->info) 332abc3aeaeSLiu Gang && (dbell->res->end 333*2a2383daSLiu Gang >= dmsg->info)) { 3346ec4bedbSLiu Gang found = 1; 3356ec4bedbSLiu Gang break; 3366ec4bedbSLiu Gang } 3376ec4bedbSLiu Gang } 338abc3aeaeSLiu Gang if (found && dbell->dinb) { 339abc3aeaeSLiu Gang dbell->dinb(fsl_dbell->mport[i], 340*2a2383daSLiu Gang dbell->dev_id, dmsg->sid, 341*2a2383daSLiu Gang dmsg->tid, 342*2a2383daSLiu Gang dmsg->info); 343abc3aeaeSLiu Gang break; 344abc3aeaeSLiu Gang } 345abc3aeaeSLiu Gang } 346abc3aeaeSLiu Gang } 347abc3aeaeSLiu Gang 348abc3aeaeSLiu Gang if (!found) { 3496ec4bedbSLiu Gang pr_debug 3506ec4bedbSLiu Gang ("RIO: spurious doorbell," 3516ec4bedbSLiu Gang " sid %2.2x tid %2.2x info %4.4x\n", 352*2a2383daSLiu Gang dmsg->sid, dmsg->tid, 353*2a2383daSLiu Gang dmsg->info); 3546ec4bedbSLiu Gang } 355abc3aeaeSLiu Gang setbits32(&fsl_dbell->dbell_regs->dmr, DOORBELL_DMR_DI); 356abc3aeaeSLiu Gang out_be32(&fsl_dbell->dbell_regs->dsr, DOORBELL_DSR_DIQI); 3576ec4bedbSLiu Gang } 3586ec4bedbSLiu Gang 3596ec4bedbSLiu Gang out: 3606ec4bedbSLiu Gang return IRQ_HANDLED; 3616ec4bedbSLiu Gang } 3626ec4bedbSLiu Gang 363abc3aeaeSLiu Gang void msg_unit_error_handler(void) 3646ec4bedbSLiu Gang { 3656ec4bedbSLiu Gang 3666ec4bedbSLiu Gang /*XXX: Error recovery is not implemented, we just clear errors */ 3676ec4bedbSLiu Gang out_be32((u32 *)(rio_regs_win + RIO_LTLEDCSR), 0); 3686ec4bedbSLiu Gang 369abc3aeaeSLiu Gang out_be32((u32 *)(rmu_regs_win + RIO_IM0SR), IMSR_CLEAR); 370abc3aeaeSLiu Gang out_be32((u32 *)(rmu_regs_win + RIO_IM1SR), IMSR_CLEAR); 371abc3aeaeSLiu Gang out_be32((u32 *)(rmu_regs_win + RIO_OM0SR), OMSR_CLEAR); 372abc3aeaeSLiu Gang out_be32((u32 *)(rmu_regs_win + RIO_OM1SR), OMSR_CLEAR); 3736ec4bedbSLiu Gang 374abc3aeaeSLiu Gang out_be32(&dbell->dbell_regs->odsr, ODSR_CLEAR); 375abc3aeaeSLiu Gang out_be32(&dbell->dbell_regs->dsr, IDSR_CLEAR); 3766ec4bedbSLiu Gang 377abc3aeaeSLiu Gang out_be32(&pw->pw_regs->pwsr, IPWSR_CLEAR); 3786ec4bedbSLiu Gang } 3796ec4bedbSLiu Gang 3806ec4bedbSLiu Gang /** 3816ec4bedbSLiu Gang * fsl_rio_port_write_handler - MPC85xx port write interrupt handler 3826ec4bedbSLiu Gang * @irq: Linux interrupt number 3836ec4bedbSLiu Gang * @dev_instance: Pointer to interrupt-specific data 3846ec4bedbSLiu Gang * 3856ec4bedbSLiu Gang * Handles port write interrupts. Parses a list of registered 3866ec4bedbSLiu Gang * port write event handlers and executes a matching event handler. 3876ec4bedbSLiu Gang */ 3886ec4bedbSLiu Gang static irqreturn_t 3896ec4bedbSLiu Gang fsl_rio_port_write_handler(int irq, void *dev_instance) 3906ec4bedbSLiu Gang { 3916ec4bedbSLiu Gang u32 ipwmr, ipwsr; 392abc3aeaeSLiu Gang struct fsl_rio_pw *pw = (struct fsl_rio_pw *)dev_instance; 3936ec4bedbSLiu Gang u32 epwisr, tmp; 3946ec4bedbSLiu Gang 395abc3aeaeSLiu Gang epwisr = in_be32(rio_regs_win + RIO_EPWISR); 3966ec4bedbSLiu Gang if (!(epwisr & RIO_EPWISR_PW)) 3976ec4bedbSLiu Gang goto pw_done; 3986ec4bedbSLiu Gang 399abc3aeaeSLiu Gang ipwmr = in_be32(&pw->pw_regs->pwmr); 400abc3aeaeSLiu Gang ipwsr = in_be32(&pw->pw_regs->pwsr); 4016ec4bedbSLiu Gang 4026ec4bedbSLiu Gang #ifdef DEBUG_PW 4036ec4bedbSLiu Gang pr_debug("PW Int->IPWMR: 0x%08x IPWSR: 0x%08x (", ipwmr, ipwsr); 4046ec4bedbSLiu Gang if (ipwsr & RIO_IPWSR_QF) 4056ec4bedbSLiu Gang pr_debug(" QF"); 4066ec4bedbSLiu Gang if (ipwsr & RIO_IPWSR_TE) 4076ec4bedbSLiu Gang pr_debug(" TE"); 4086ec4bedbSLiu Gang if (ipwsr & RIO_IPWSR_QFI) 4096ec4bedbSLiu Gang pr_debug(" QFI"); 4106ec4bedbSLiu Gang if (ipwsr & RIO_IPWSR_PWD) 4116ec4bedbSLiu Gang pr_debug(" PWD"); 4126ec4bedbSLiu Gang if (ipwsr & RIO_IPWSR_PWB) 4136ec4bedbSLiu Gang pr_debug(" PWB"); 4146ec4bedbSLiu Gang pr_debug(" )\n"); 4156ec4bedbSLiu Gang #endif 4166ec4bedbSLiu Gang /* Schedule deferred processing if PW was received */ 4176ec4bedbSLiu Gang if (ipwsr & RIO_IPWSR_QFI) { 4186ec4bedbSLiu Gang /* Save PW message (if there is room in FIFO), 4196ec4bedbSLiu Gang * otherwise discard it. 4206ec4bedbSLiu Gang */ 421abc3aeaeSLiu Gang if (kfifo_avail(&pw->pw_fifo) >= RIO_PW_MSG_SIZE) { 422abc3aeaeSLiu Gang pw->port_write_msg.msg_count++; 423abc3aeaeSLiu Gang kfifo_in(&pw->pw_fifo, pw->port_write_msg.virt, 4246ec4bedbSLiu Gang RIO_PW_MSG_SIZE); 4256ec4bedbSLiu Gang } else { 426abc3aeaeSLiu Gang pw->port_write_msg.discard_count++; 4276ec4bedbSLiu Gang pr_debug("RIO: ISR Discarded Port-Write Msg(s) (%d)\n", 428abc3aeaeSLiu Gang pw->port_write_msg.discard_count); 4296ec4bedbSLiu Gang } 4306ec4bedbSLiu Gang /* Clear interrupt and issue Clear Queue command. This allows 4316ec4bedbSLiu Gang * another port-write to be received. 4326ec4bedbSLiu Gang */ 433abc3aeaeSLiu Gang out_be32(&pw->pw_regs->pwsr, RIO_IPWSR_QFI); 434abc3aeaeSLiu Gang out_be32(&pw->pw_regs->pwmr, ipwmr | RIO_IPWMR_CQ); 4356ec4bedbSLiu Gang 436abc3aeaeSLiu Gang schedule_work(&pw->pw_work); 4376ec4bedbSLiu Gang } 4386ec4bedbSLiu Gang 4396ec4bedbSLiu Gang if ((ipwmr & RIO_IPWMR_EIE) && (ipwsr & RIO_IPWSR_TE)) { 440abc3aeaeSLiu Gang pw->port_write_msg.err_count++; 4416ec4bedbSLiu Gang pr_debug("RIO: Port-Write Transaction Err (%d)\n", 442abc3aeaeSLiu Gang pw->port_write_msg.err_count); 4436ec4bedbSLiu Gang /* Clear Transaction Error: port-write controller should be 4446ec4bedbSLiu Gang * disabled when clearing this error 4456ec4bedbSLiu Gang */ 446abc3aeaeSLiu Gang out_be32(&pw->pw_regs->pwmr, ipwmr & ~RIO_IPWMR_PWE); 447abc3aeaeSLiu Gang out_be32(&pw->pw_regs->pwsr, RIO_IPWSR_TE); 448abc3aeaeSLiu Gang out_be32(&pw->pw_regs->pwmr, ipwmr); 4496ec4bedbSLiu Gang } 4506ec4bedbSLiu Gang 4516ec4bedbSLiu Gang if (ipwsr & RIO_IPWSR_PWD) { 452abc3aeaeSLiu Gang pw->port_write_msg.discard_count++; 4536ec4bedbSLiu Gang pr_debug("RIO: Port Discarded Port-Write Msg(s) (%d)\n", 454abc3aeaeSLiu Gang pw->port_write_msg.discard_count); 455abc3aeaeSLiu Gang out_be32(&pw->pw_regs->pwsr, RIO_IPWSR_PWD); 4566ec4bedbSLiu Gang } 4576ec4bedbSLiu Gang 4586ec4bedbSLiu Gang pw_done: 4596ec4bedbSLiu Gang if (epwisr & RIO_EPWISR_PINT1) { 460abc3aeaeSLiu Gang tmp = in_be32(rio_regs_win + RIO_LTLEDCSR); 4616ec4bedbSLiu Gang pr_debug("RIO_LTLEDCSR = 0x%x\n", tmp); 462abc3aeaeSLiu Gang fsl_rio_port_error_handler(0); 4636ec4bedbSLiu Gang } 4646ec4bedbSLiu Gang 4656ec4bedbSLiu Gang if (epwisr & RIO_EPWISR_PINT2) { 466abc3aeaeSLiu Gang tmp = in_be32(rio_regs_win + RIO_LTLEDCSR); 4676ec4bedbSLiu Gang pr_debug("RIO_LTLEDCSR = 0x%x\n", tmp); 468abc3aeaeSLiu Gang fsl_rio_port_error_handler(1); 4696ec4bedbSLiu Gang } 4706ec4bedbSLiu Gang 4716ec4bedbSLiu Gang if (epwisr & RIO_EPWISR_MU) { 472abc3aeaeSLiu Gang tmp = in_be32(rio_regs_win + RIO_LTLEDCSR); 4736ec4bedbSLiu Gang pr_debug("RIO_LTLEDCSR = 0x%x\n", tmp); 474abc3aeaeSLiu Gang msg_unit_error_handler(); 4756ec4bedbSLiu Gang } 4766ec4bedbSLiu Gang 4776ec4bedbSLiu Gang return IRQ_HANDLED; 4786ec4bedbSLiu Gang } 4796ec4bedbSLiu Gang 4806ec4bedbSLiu Gang static void fsl_pw_dpc(struct work_struct *work) 4816ec4bedbSLiu Gang { 482abc3aeaeSLiu Gang struct fsl_rio_pw *pw = container_of(work, struct fsl_rio_pw, pw_work); 4836ec4bedbSLiu Gang u32 msg_buffer[RIO_PW_MSG_SIZE/sizeof(u32)]; 4846ec4bedbSLiu Gang 4856ec4bedbSLiu Gang /* 4866ec4bedbSLiu Gang * Process port-write messages 4876ec4bedbSLiu Gang */ 488abc3aeaeSLiu Gang while (kfifo_out_spinlocked(&pw->pw_fifo, (unsigned char *)msg_buffer, 489abc3aeaeSLiu Gang RIO_PW_MSG_SIZE, &pw->pw_fifo_lock)) { 4906ec4bedbSLiu Gang /* Process one message */ 4916ec4bedbSLiu Gang #ifdef DEBUG_PW 4926ec4bedbSLiu Gang { 4936ec4bedbSLiu Gang u32 i; 4946ec4bedbSLiu Gang pr_debug("%s : Port-Write Message:", __func__); 4956ec4bedbSLiu Gang for (i = 0; i < RIO_PW_MSG_SIZE/sizeof(u32); i++) { 4966ec4bedbSLiu Gang if ((i%4) == 0) 4976ec4bedbSLiu Gang pr_debug("\n0x%02x: 0x%08x", i*4, 4986ec4bedbSLiu Gang msg_buffer[i]); 4996ec4bedbSLiu Gang else 5006ec4bedbSLiu Gang pr_debug(" 0x%08x", msg_buffer[i]); 5016ec4bedbSLiu Gang } 5026ec4bedbSLiu Gang pr_debug("\n"); 5036ec4bedbSLiu Gang } 5046ec4bedbSLiu Gang #endif 5056ec4bedbSLiu Gang /* Pass the port-write message to RIO core for processing */ 5066ec4bedbSLiu Gang rio_inb_pwrite_handler((union rio_pw_msg *)msg_buffer); 5076ec4bedbSLiu Gang } 5086ec4bedbSLiu Gang } 5096ec4bedbSLiu Gang 5106ec4bedbSLiu Gang /** 5116ec4bedbSLiu Gang * fsl_rio_pw_enable - enable/disable port-write interface init 5126ec4bedbSLiu Gang * @mport: Master port implementing the port write unit 5136ec4bedbSLiu Gang * @enable: 1=enable; 0=disable port-write message handling 5146ec4bedbSLiu Gang */ 5156ec4bedbSLiu Gang int fsl_rio_pw_enable(struct rio_mport *mport, int enable) 5166ec4bedbSLiu Gang { 5176ec4bedbSLiu Gang u32 rval; 5186ec4bedbSLiu Gang 519abc3aeaeSLiu Gang rval = in_be32(&pw->pw_regs->pwmr); 5206ec4bedbSLiu Gang 5216ec4bedbSLiu Gang if (enable) 5226ec4bedbSLiu Gang rval |= RIO_IPWMR_PWE; 5236ec4bedbSLiu Gang else 5246ec4bedbSLiu Gang rval &= ~RIO_IPWMR_PWE; 5256ec4bedbSLiu Gang 526abc3aeaeSLiu Gang out_be32(&pw->pw_regs->pwmr, rval); 5276ec4bedbSLiu Gang 5286ec4bedbSLiu Gang return 0; 5296ec4bedbSLiu Gang } 5306ec4bedbSLiu Gang 5316ec4bedbSLiu Gang /** 5326ec4bedbSLiu Gang * fsl_rio_port_write_init - MPC85xx port write interface init 5336ec4bedbSLiu Gang * @mport: Master port implementing the port write unit 5346ec4bedbSLiu Gang * 5356ec4bedbSLiu Gang * Initializes port write unit hardware and DMA buffer 5366ec4bedbSLiu Gang * ring. Called from fsl_rio_setup(). Returns %0 on success 5376ec4bedbSLiu Gang * or %-ENOMEM on failure. 5386ec4bedbSLiu Gang */ 5396ec4bedbSLiu Gang 540abc3aeaeSLiu Gang int fsl_rio_port_write_init(struct fsl_rio_pw *pw) 5416ec4bedbSLiu Gang { 5426ec4bedbSLiu Gang int rc = 0; 5436ec4bedbSLiu Gang 5446ec4bedbSLiu Gang /* Following configurations require a disabled port write controller */ 545abc3aeaeSLiu Gang out_be32(&pw->pw_regs->pwmr, 546abc3aeaeSLiu Gang in_be32(&pw->pw_regs->pwmr) & ~RIO_IPWMR_PWE); 5476ec4bedbSLiu Gang 5486ec4bedbSLiu Gang /* Initialize port write */ 549abc3aeaeSLiu Gang pw->port_write_msg.virt = dma_alloc_coherent(pw->dev, 5506ec4bedbSLiu Gang RIO_PW_MSG_SIZE, 551abc3aeaeSLiu Gang &pw->port_write_msg.phys, GFP_KERNEL); 552abc3aeaeSLiu Gang if (!pw->port_write_msg.virt) { 5536ec4bedbSLiu Gang pr_err("RIO: unable allocate port write queue\n"); 5546ec4bedbSLiu Gang return -ENOMEM; 5556ec4bedbSLiu Gang } 5566ec4bedbSLiu Gang 557abc3aeaeSLiu Gang pw->port_write_msg.err_count = 0; 558abc3aeaeSLiu Gang pw->port_write_msg.discard_count = 0; 5596ec4bedbSLiu Gang 5606ec4bedbSLiu Gang /* Point dequeue/enqueue pointers at first entry */ 561abc3aeaeSLiu Gang out_be32(&pw->pw_regs->epwqbar, 0); 562abc3aeaeSLiu Gang out_be32(&pw->pw_regs->pwqbar, (u32) pw->port_write_msg.phys); 5636ec4bedbSLiu Gang 5646ec4bedbSLiu Gang pr_debug("EIPWQBAR: 0x%08x IPWQBAR: 0x%08x\n", 565abc3aeaeSLiu Gang in_be32(&pw->pw_regs->epwqbar), 566abc3aeaeSLiu Gang in_be32(&pw->pw_regs->pwqbar)); 5676ec4bedbSLiu Gang 5686ec4bedbSLiu Gang /* Clear interrupt status IPWSR */ 569abc3aeaeSLiu Gang out_be32(&pw->pw_regs->pwsr, 5706ec4bedbSLiu Gang (RIO_IPWSR_TE | RIO_IPWSR_QFI | RIO_IPWSR_PWD)); 5716ec4bedbSLiu Gang 5726ec4bedbSLiu Gang /* Configure port write contoller for snooping enable all reporting, 5736ec4bedbSLiu Gang clear queue full */ 574abc3aeaeSLiu Gang out_be32(&pw->pw_regs->pwmr, 5756ec4bedbSLiu Gang RIO_IPWMR_SEN | RIO_IPWMR_QFIE | RIO_IPWMR_EIE | RIO_IPWMR_CQ); 5766ec4bedbSLiu Gang 5776ec4bedbSLiu Gang 5786ec4bedbSLiu Gang /* Hook up port-write handler */ 579abc3aeaeSLiu Gang rc = request_irq(IRQ_RIO_PW(pw), fsl_rio_port_write_handler, 580abc3aeaeSLiu Gang IRQF_SHARED, "port-write", (void *)pw); 5816ec4bedbSLiu Gang if (rc < 0) { 5826ec4bedbSLiu Gang pr_err("MPC85xx RIO: unable to request inbound doorbell irq"); 5836ec4bedbSLiu Gang goto err_out; 5846ec4bedbSLiu Gang } 5856ec4bedbSLiu Gang /* Enable Error Interrupt */ 5866ec4bedbSLiu Gang out_be32((u32 *)(rio_regs_win + RIO_LTLEECSR), LTLEECSR_ENABLE_ALL); 5876ec4bedbSLiu Gang 588abc3aeaeSLiu Gang INIT_WORK(&pw->pw_work, fsl_pw_dpc); 589abc3aeaeSLiu Gang spin_lock_init(&pw->pw_fifo_lock); 590abc3aeaeSLiu Gang if (kfifo_alloc(&pw->pw_fifo, RIO_PW_MSG_SIZE * 32, GFP_KERNEL)) { 5916ec4bedbSLiu Gang pr_err("FIFO allocation failed\n"); 5926ec4bedbSLiu Gang rc = -ENOMEM; 5936ec4bedbSLiu Gang goto err_out_irq; 5946ec4bedbSLiu Gang } 5956ec4bedbSLiu Gang 5966ec4bedbSLiu Gang pr_debug("IPWMR: 0x%08x IPWSR: 0x%08x\n", 597abc3aeaeSLiu Gang in_be32(&pw->pw_regs->pwmr), 598abc3aeaeSLiu Gang in_be32(&pw->pw_regs->pwsr)); 5996ec4bedbSLiu Gang 6006ec4bedbSLiu Gang return rc; 6016ec4bedbSLiu Gang 6026ec4bedbSLiu Gang err_out_irq: 603abc3aeaeSLiu Gang free_irq(IRQ_RIO_PW(pw), (void *)pw); 6046ec4bedbSLiu Gang err_out: 605abc3aeaeSLiu Gang dma_free_coherent(pw->dev, RIO_PW_MSG_SIZE, 606abc3aeaeSLiu Gang pw->port_write_msg.virt, 607abc3aeaeSLiu Gang pw->port_write_msg.phys); 6086ec4bedbSLiu Gang return rc; 6096ec4bedbSLiu Gang } 6106ec4bedbSLiu Gang 6116ec4bedbSLiu Gang /** 6126ec4bedbSLiu Gang * fsl_rio_doorbell_send - Send a MPC85xx doorbell message 6136ec4bedbSLiu Gang * @mport: RapidIO master port info 6146ec4bedbSLiu Gang * @index: ID of RapidIO interface 6156ec4bedbSLiu Gang * @destid: Destination ID of target device 6166ec4bedbSLiu Gang * @data: 16-bit info field of RapidIO doorbell message 6176ec4bedbSLiu Gang * 6186ec4bedbSLiu Gang * Sends a MPC85xx doorbell message. Returns %0 on success or 6196ec4bedbSLiu Gang * %-EINVAL on failure. 6206ec4bedbSLiu Gang */ 621abc3aeaeSLiu Gang int fsl_rio_doorbell_send(struct rio_mport *mport, 6226ec4bedbSLiu Gang int index, u16 destid, u16 data) 6236ec4bedbSLiu Gang { 6246ec4bedbSLiu Gang pr_debug("fsl_doorbell_send: index %d destid %4.4x data %4.4x\n", 6256ec4bedbSLiu Gang index, destid, data); 626abc3aeaeSLiu Gang 6276ec4bedbSLiu Gang /* In the serial version silicons, such as MPC8548, MPC8641, 6286ec4bedbSLiu Gang * below operations is must be. 6296ec4bedbSLiu Gang */ 630abc3aeaeSLiu Gang out_be32(&dbell->dbell_regs->odmr, 0x00000000); 631abc3aeaeSLiu Gang out_be32(&dbell->dbell_regs->odretcr, 0x00000004); 632abc3aeaeSLiu Gang out_be32(&dbell->dbell_regs->oddpr, destid << 16); 633abc3aeaeSLiu Gang out_be32(&dbell->dbell_regs->oddatr, (index << 20) | data); 634abc3aeaeSLiu Gang out_be32(&dbell->dbell_regs->odmr, 0x00000001); 6356ec4bedbSLiu Gang 6366ec4bedbSLiu Gang return 0; 6376ec4bedbSLiu Gang } 6386ec4bedbSLiu Gang 6396ec4bedbSLiu Gang /** 6406ec4bedbSLiu Gang * fsl_add_outb_message - Add message to the MPC85xx outbound message queue 6416ec4bedbSLiu Gang * @mport: Master port with outbound message queue 6426ec4bedbSLiu Gang * @rdev: Target of outbound message 6436ec4bedbSLiu Gang * @mbox: Outbound mailbox 6446ec4bedbSLiu Gang * @buffer: Message to add to outbound queue 6456ec4bedbSLiu Gang * @len: Length of message 6466ec4bedbSLiu Gang * 6476ec4bedbSLiu Gang * Adds the @buffer message to the MPC85xx outbound message queue. Returns 6486ec4bedbSLiu Gang * %0 on success or %-EINVAL on failure. 6496ec4bedbSLiu Gang */ 650abc3aeaeSLiu Gang int 6516ec4bedbSLiu Gang fsl_add_outb_message(struct rio_mport *mport, struct rio_dev *rdev, int mbox, 6526ec4bedbSLiu Gang void *buffer, size_t len) 6536ec4bedbSLiu Gang { 6546ec4bedbSLiu Gang struct fsl_rmu *rmu = GET_RMM_HANDLE(mport); 6556ec4bedbSLiu Gang u32 omr; 6566ec4bedbSLiu Gang struct rio_tx_desc *desc = (struct rio_tx_desc *)rmu->msg_tx_ring.virt 6576ec4bedbSLiu Gang + rmu->msg_tx_ring.tx_slot; 6586ec4bedbSLiu Gang int ret = 0; 6596ec4bedbSLiu Gang 6606ec4bedbSLiu Gang pr_debug("RIO: fsl_add_outb_message(): destid %4.4x mbox %d buffer " \ 661*2a2383daSLiu Gang "%p len %8.8zx\n", rdev->destid, mbox, buffer, len); 6626ec4bedbSLiu Gang if ((len < 8) || (len > RIO_MAX_MSG_SIZE)) { 6636ec4bedbSLiu Gang ret = -EINVAL; 6646ec4bedbSLiu Gang goto out; 6656ec4bedbSLiu Gang } 6666ec4bedbSLiu Gang 6676ec4bedbSLiu Gang /* Copy and clear rest of buffer */ 6686ec4bedbSLiu Gang memcpy(rmu->msg_tx_ring.virt_buffer[rmu->msg_tx_ring.tx_slot], buffer, 6696ec4bedbSLiu Gang len); 6706ec4bedbSLiu Gang if (len < (RIO_MAX_MSG_SIZE - 4)) 6716ec4bedbSLiu Gang memset(rmu->msg_tx_ring.virt_buffer[rmu->msg_tx_ring.tx_slot] 6726ec4bedbSLiu Gang + len, 0, RIO_MAX_MSG_SIZE - len); 6736ec4bedbSLiu Gang 6746ec4bedbSLiu Gang /* Set mbox field for message, and set destid */ 6756ec4bedbSLiu Gang desc->dport = (rdev->destid << 16) | (mbox & 0x3); 6766ec4bedbSLiu Gang 6776ec4bedbSLiu Gang /* Enable EOMI interrupt and priority */ 678abc3aeaeSLiu Gang desc->dattr = 0x28000000 | ((mport->index) << 20); 6796ec4bedbSLiu Gang 6806ec4bedbSLiu Gang /* Set transfer size aligned to next power of 2 (in double words) */ 6816ec4bedbSLiu Gang desc->dwcnt = is_power_of_2(len) ? len : 1 << get_bitmask_order(len); 6826ec4bedbSLiu Gang 6836ec4bedbSLiu Gang /* Set snooping and source buffer address */ 6846ec4bedbSLiu Gang desc->saddr = 0x00000004 6856ec4bedbSLiu Gang | rmu->msg_tx_ring.phys_buffer[rmu->msg_tx_ring.tx_slot]; 6866ec4bedbSLiu Gang 6876ec4bedbSLiu Gang /* Increment enqueue pointer */ 6886ec4bedbSLiu Gang omr = in_be32(&rmu->msg_regs->omr); 6896ec4bedbSLiu Gang out_be32(&rmu->msg_regs->omr, omr | RIO_MSG_OMR_MUI); 6906ec4bedbSLiu Gang 6916ec4bedbSLiu Gang /* Go to next descriptor */ 6926ec4bedbSLiu Gang if (++rmu->msg_tx_ring.tx_slot == rmu->msg_tx_ring.size) 6936ec4bedbSLiu Gang rmu->msg_tx_ring.tx_slot = 0; 6946ec4bedbSLiu Gang 6956ec4bedbSLiu Gang out: 6966ec4bedbSLiu Gang return ret; 6976ec4bedbSLiu Gang } 6986ec4bedbSLiu Gang 6996ec4bedbSLiu Gang /** 7006ec4bedbSLiu Gang * fsl_open_outb_mbox - Initialize MPC85xx outbound mailbox 7016ec4bedbSLiu Gang * @mport: Master port implementing the outbound message unit 7026ec4bedbSLiu Gang * @dev_id: Device specific pointer to pass on event 7036ec4bedbSLiu Gang * @mbox: Mailbox to open 7046ec4bedbSLiu Gang * @entries: Number of entries in the outbound mailbox ring 7056ec4bedbSLiu Gang * 7066ec4bedbSLiu Gang * Initializes buffer ring, request the outbound message interrupt, 7076ec4bedbSLiu Gang * and enables the outbound message unit. Returns %0 on success and 7086ec4bedbSLiu Gang * %-EINVAL or %-ENOMEM on failure. 7096ec4bedbSLiu Gang */ 710abc3aeaeSLiu Gang int 7116ec4bedbSLiu Gang fsl_open_outb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entries) 7126ec4bedbSLiu Gang { 7136ec4bedbSLiu Gang int i, j, rc = 0; 7146ec4bedbSLiu Gang struct rio_priv *priv = mport->priv; 7156ec4bedbSLiu Gang struct fsl_rmu *rmu = GET_RMM_HANDLE(mport); 7166ec4bedbSLiu Gang 7176ec4bedbSLiu Gang if ((entries < RIO_MIN_TX_RING_SIZE) || 7186ec4bedbSLiu Gang (entries > RIO_MAX_TX_RING_SIZE) || (!is_power_of_2(entries))) { 7196ec4bedbSLiu Gang rc = -EINVAL; 7206ec4bedbSLiu Gang goto out; 7216ec4bedbSLiu Gang } 7226ec4bedbSLiu Gang 7236ec4bedbSLiu Gang /* Initialize shadow copy ring */ 7246ec4bedbSLiu Gang rmu->msg_tx_ring.dev_id = dev_id; 7256ec4bedbSLiu Gang rmu->msg_tx_ring.size = entries; 7266ec4bedbSLiu Gang 7276ec4bedbSLiu Gang for (i = 0; i < rmu->msg_tx_ring.size; i++) { 7286ec4bedbSLiu Gang rmu->msg_tx_ring.virt_buffer[i] = 7296ec4bedbSLiu Gang dma_alloc_coherent(priv->dev, RIO_MSG_BUFFER_SIZE, 7306ec4bedbSLiu Gang &rmu->msg_tx_ring.phys_buffer[i], GFP_KERNEL); 7316ec4bedbSLiu Gang if (!rmu->msg_tx_ring.virt_buffer[i]) { 7326ec4bedbSLiu Gang rc = -ENOMEM; 7336ec4bedbSLiu Gang for (j = 0; j < rmu->msg_tx_ring.size; j++) 7346ec4bedbSLiu Gang if (rmu->msg_tx_ring.virt_buffer[j]) 7356ec4bedbSLiu Gang dma_free_coherent(priv->dev, 7366ec4bedbSLiu Gang RIO_MSG_BUFFER_SIZE, 7376ec4bedbSLiu Gang rmu->msg_tx_ring. 7386ec4bedbSLiu Gang virt_buffer[j], 7396ec4bedbSLiu Gang rmu->msg_tx_ring. 7406ec4bedbSLiu Gang phys_buffer[j]); 7416ec4bedbSLiu Gang goto out; 7426ec4bedbSLiu Gang } 7436ec4bedbSLiu Gang } 7446ec4bedbSLiu Gang 7456ec4bedbSLiu Gang /* Initialize outbound message descriptor ring */ 7466ec4bedbSLiu Gang rmu->msg_tx_ring.virt = dma_alloc_coherent(priv->dev, 7476ec4bedbSLiu Gang rmu->msg_tx_ring.size * RIO_MSG_DESC_SIZE, 7486ec4bedbSLiu Gang &rmu->msg_tx_ring.phys, GFP_KERNEL); 7496ec4bedbSLiu Gang if (!rmu->msg_tx_ring.virt) { 7506ec4bedbSLiu Gang rc = -ENOMEM; 7516ec4bedbSLiu Gang goto out_dma; 7526ec4bedbSLiu Gang } 7536ec4bedbSLiu Gang memset(rmu->msg_tx_ring.virt, 0, 7546ec4bedbSLiu Gang rmu->msg_tx_ring.size * RIO_MSG_DESC_SIZE); 7556ec4bedbSLiu Gang rmu->msg_tx_ring.tx_slot = 0; 7566ec4bedbSLiu Gang 7576ec4bedbSLiu Gang /* Point dequeue/enqueue pointers at first entry in ring */ 7586ec4bedbSLiu Gang out_be32(&rmu->msg_regs->odqdpar, rmu->msg_tx_ring.phys); 7596ec4bedbSLiu Gang out_be32(&rmu->msg_regs->odqepar, rmu->msg_tx_ring.phys); 7606ec4bedbSLiu Gang 7616ec4bedbSLiu Gang /* Configure for snooping */ 7626ec4bedbSLiu Gang out_be32(&rmu->msg_regs->osar, 0x00000004); 7636ec4bedbSLiu Gang 7646ec4bedbSLiu Gang /* Clear interrupt status */ 7656ec4bedbSLiu Gang out_be32(&rmu->msg_regs->osr, 0x000000b3); 7666ec4bedbSLiu Gang 7676ec4bedbSLiu Gang /* Hook up outbound message handler */ 7686ec4bedbSLiu Gang rc = request_irq(IRQ_RIO_TX(mport), fsl_rio_tx_handler, 0, 7696ec4bedbSLiu Gang "msg_tx", (void *)mport); 7706ec4bedbSLiu Gang if (rc < 0) 7716ec4bedbSLiu Gang goto out_irq; 7726ec4bedbSLiu Gang 7736ec4bedbSLiu Gang /* 7746ec4bedbSLiu Gang * Configure outbound message unit 7756ec4bedbSLiu Gang * Snooping 7766ec4bedbSLiu Gang * Interrupts (all enabled, except QEIE) 7776ec4bedbSLiu Gang * Chaining mode 7786ec4bedbSLiu Gang * Disable 7796ec4bedbSLiu Gang */ 7806ec4bedbSLiu Gang out_be32(&rmu->msg_regs->omr, 0x00100220); 7816ec4bedbSLiu Gang 7826ec4bedbSLiu Gang /* Set number of entries */ 7836ec4bedbSLiu Gang out_be32(&rmu->msg_regs->omr, 7846ec4bedbSLiu Gang in_be32(&rmu->msg_regs->omr) | 7856ec4bedbSLiu Gang ((get_bitmask_order(entries) - 2) << 12)); 7866ec4bedbSLiu Gang 7876ec4bedbSLiu Gang /* Now enable the unit */ 7886ec4bedbSLiu Gang out_be32(&rmu->msg_regs->omr, in_be32(&rmu->msg_regs->omr) | 0x1); 7896ec4bedbSLiu Gang 7906ec4bedbSLiu Gang out: 7916ec4bedbSLiu Gang return rc; 7926ec4bedbSLiu Gang 7936ec4bedbSLiu Gang out_irq: 7946ec4bedbSLiu Gang dma_free_coherent(priv->dev, 7956ec4bedbSLiu Gang rmu->msg_tx_ring.size * RIO_MSG_DESC_SIZE, 7966ec4bedbSLiu Gang rmu->msg_tx_ring.virt, rmu->msg_tx_ring.phys); 7976ec4bedbSLiu Gang 7986ec4bedbSLiu Gang out_dma: 7996ec4bedbSLiu Gang for (i = 0; i < rmu->msg_tx_ring.size; i++) 8006ec4bedbSLiu Gang dma_free_coherent(priv->dev, RIO_MSG_BUFFER_SIZE, 8016ec4bedbSLiu Gang rmu->msg_tx_ring.virt_buffer[i], 8026ec4bedbSLiu Gang rmu->msg_tx_ring.phys_buffer[i]); 8036ec4bedbSLiu Gang 8046ec4bedbSLiu Gang return rc; 8056ec4bedbSLiu Gang } 8066ec4bedbSLiu Gang 8076ec4bedbSLiu Gang /** 8086ec4bedbSLiu Gang * fsl_close_outb_mbox - Shut down MPC85xx outbound mailbox 8096ec4bedbSLiu Gang * @mport: Master port implementing the outbound message unit 8106ec4bedbSLiu Gang * @mbox: Mailbox to close 8116ec4bedbSLiu Gang * 8126ec4bedbSLiu Gang * Disables the outbound message unit, free all buffers, and 8136ec4bedbSLiu Gang * frees the outbound message interrupt. 8146ec4bedbSLiu Gang */ 815abc3aeaeSLiu Gang void fsl_close_outb_mbox(struct rio_mport *mport, int mbox) 8166ec4bedbSLiu Gang { 8176ec4bedbSLiu Gang struct rio_priv *priv = mport->priv; 8186ec4bedbSLiu Gang struct fsl_rmu *rmu = GET_RMM_HANDLE(mport); 8196ec4bedbSLiu Gang 8206ec4bedbSLiu Gang /* Disable inbound message unit */ 8216ec4bedbSLiu Gang out_be32(&rmu->msg_regs->omr, 0); 8226ec4bedbSLiu Gang 8236ec4bedbSLiu Gang /* Free ring */ 8246ec4bedbSLiu Gang dma_free_coherent(priv->dev, 8256ec4bedbSLiu Gang rmu->msg_tx_ring.size * RIO_MSG_DESC_SIZE, 8266ec4bedbSLiu Gang rmu->msg_tx_ring.virt, rmu->msg_tx_ring.phys); 8276ec4bedbSLiu Gang 8286ec4bedbSLiu Gang /* Free interrupt */ 8296ec4bedbSLiu Gang free_irq(IRQ_RIO_TX(mport), (void *)mport); 8306ec4bedbSLiu Gang } 8316ec4bedbSLiu Gang 8326ec4bedbSLiu Gang /** 8336ec4bedbSLiu Gang * fsl_open_inb_mbox - Initialize MPC85xx inbound mailbox 8346ec4bedbSLiu Gang * @mport: Master port implementing the inbound message unit 8356ec4bedbSLiu Gang * @dev_id: Device specific pointer to pass on event 8366ec4bedbSLiu Gang * @mbox: Mailbox to open 8376ec4bedbSLiu Gang * @entries: Number of entries in the inbound mailbox ring 8386ec4bedbSLiu Gang * 8396ec4bedbSLiu Gang * Initializes buffer ring, request the inbound message interrupt, 8406ec4bedbSLiu Gang * and enables the inbound message unit. Returns %0 on success 8416ec4bedbSLiu Gang * and %-EINVAL or %-ENOMEM on failure. 8426ec4bedbSLiu Gang */ 843abc3aeaeSLiu Gang int 8446ec4bedbSLiu Gang fsl_open_inb_mbox(struct rio_mport *mport, void *dev_id, int mbox, int entries) 8456ec4bedbSLiu Gang { 8466ec4bedbSLiu Gang int i, rc = 0; 8476ec4bedbSLiu Gang struct rio_priv *priv = mport->priv; 8486ec4bedbSLiu Gang struct fsl_rmu *rmu = GET_RMM_HANDLE(mport); 8496ec4bedbSLiu Gang 8506ec4bedbSLiu Gang if ((entries < RIO_MIN_RX_RING_SIZE) || 8516ec4bedbSLiu Gang (entries > RIO_MAX_RX_RING_SIZE) || (!is_power_of_2(entries))) { 8526ec4bedbSLiu Gang rc = -EINVAL; 8536ec4bedbSLiu Gang goto out; 8546ec4bedbSLiu Gang } 8556ec4bedbSLiu Gang 8566ec4bedbSLiu Gang /* Initialize client buffer ring */ 8576ec4bedbSLiu Gang rmu->msg_rx_ring.dev_id = dev_id; 8586ec4bedbSLiu Gang rmu->msg_rx_ring.size = entries; 8596ec4bedbSLiu Gang rmu->msg_rx_ring.rx_slot = 0; 8606ec4bedbSLiu Gang for (i = 0; i < rmu->msg_rx_ring.size; i++) 8616ec4bedbSLiu Gang rmu->msg_rx_ring.virt_buffer[i] = NULL; 8626ec4bedbSLiu Gang 8636ec4bedbSLiu Gang /* Initialize inbound message ring */ 8646ec4bedbSLiu Gang rmu->msg_rx_ring.virt = dma_alloc_coherent(priv->dev, 8656ec4bedbSLiu Gang rmu->msg_rx_ring.size * RIO_MAX_MSG_SIZE, 8666ec4bedbSLiu Gang &rmu->msg_rx_ring.phys, GFP_KERNEL); 8676ec4bedbSLiu Gang if (!rmu->msg_rx_ring.virt) { 8686ec4bedbSLiu Gang rc = -ENOMEM; 8696ec4bedbSLiu Gang goto out; 8706ec4bedbSLiu Gang } 8716ec4bedbSLiu Gang 8726ec4bedbSLiu Gang /* Point dequeue/enqueue pointers at first entry in ring */ 8736ec4bedbSLiu Gang out_be32(&rmu->msg_regs->ifqdpar, (u32) rmu->msg_rx_ring.phys); 8746ec4bedbSLiu Gang out_be32(&rmu->msg_regs->ifqepar, (u32) rmu->msg_rx_ring.phys); 8756ec4bedbSLiu Gang 8766ec4bedbSLiu Gang /* Clear interrupt status */ 8776ec4bedbSLiu Gang out_be32(&rmu->msg_regs->isr, 0x00000091); 8786ec4bedbSLiu Gang 8796ec4bedbSLiu Gang /* Hook up inbound message handler */ 8806ec4bedbSLiu Gang rc = request_irq(IRQ_RIO_RX(mport), fsl_rio_rx_handler, 0, 8816ec4bedbSLiu Gang "msg_rx", (void *)mport); 8826ec4bedbSLiu Gang if (rc < 0) { 8836ec4bedbSLiu Gang dma_free_coherent(priv->dev, RIO_MSG_BUFFER_SIZE, 8846ec4bedbSLiu Gang rmu->msg_tx_ring.virt_buffer[i], 8856ec4bedbSLiu Gang rmu->msg_tx_ring.phys_buffer[i]); 8866ec4bedbSLiu Gang goto out; 8876ec4bedbSLiu Gang } 8886ec4bedbSLiu Gang 8896ec4bedbSLiu Gang /* 8906ec4bedbSLiu Gang * Configure inbound message unit: 8916ec4bedbSLiu Gang * Snooping 8926ec4bedbSLiu Gang * 4KB max message size 8936ec4bedbSLiu Gang * Unmask all interrupt sources 8946ec4bedbSLiu Gang * Disable 8956ec4bedbSLiu Gang */ 8966ec4bedbSLiu Gang out_be32(&rmu->msg_regs->imr, 0x001b0060); 8976ec4bedbSLiu Gang 8986ec4bedbSLiu Gang /* Set number of queue entries */ 8996ec4bedbSLiu Gang setbits32(&rmu->msg_regs->imr, (get_bitmask_order(entries) - 2) << 12); 9006ec4bedbSLiu Gang 9016ec4bedbSLiu Gang /* Now enable the unit */ 9026ec4bedbSLiu Gang setbits32(&rmu->msg_regs->imr, 0x1); 9036ec4bedbSLiu Gang 9046ec4bedbSLiu Gang out: 9056ec4bedbSLiu Gang return rc; 9066ec4bedbSLiu Gang } 9076ec4bedbSLiu Gang 9086ec4bedbSLiu Gang /** 9096ec4bedbSLiu Gang * fsl_close_inb_mbox - Shut down MPC85xx inbound mailbox 9106ec4bedbSLiu Gang * @mport: Master port implementing the inbound message unit 9116ec4bedbSLiu Gang * @mbox: Mailbox to close 9126ec4bedbSLiu Gang * 9136ec4bedbSLiu Gang * Disables the inbound message unit, free all buffers, and 9146ec4bedbSLiu Gang * frees the inbound message interrupt. 9156ec4bedbSLiu Gang */ 916abc3aeaeSLiu Gang void fsl_close_inb_mbox(struct rio_mport *mport, int mbox) 9176ec4bedbSLiu Gang { 9186ec4bedbSLiu Gang struct rio_priv *priv = mport->priv; 9196ec4bedbSLiu Gang struct fsl_rmu *rmu = GET_RMM_HANDLE(mport); 9206ec4bedbSLiu Gang 9216ec4bedbSLiu Gang /* Disable inbound message unit */ 9226ec4bedbSLiu Gang out_be32(&rmu->msg_regs->imr, 0); 9236ec4bedbSLiu Gang 9246ec4bedbSLiu Gang /* Free ring */ 9256ec4bedbSLiu Gang dma_free_coherent(priv->dev, rmu->msg_rx_ring.size * RIO_MAX_MSG_SIZE, 9266ec4bedbSLiu Gang rmu->msg_rx_ring.virt, rmu->msg_rx_ring.phys); 9276ec4bedbSLiu Gang 9286ec4bedbSLiu Gang /* Free interrupt */ 9296ec4bedbSLiu Gang free_irq(IRQ_RIO_RX(mport), (void *)mport); 9306ec4bedbSLiu Gang } 9316ec4bedbSLiu Gang 9326ec4bedbSLiu Gang /** 9336ec4bedbSLiu Gang * fsl_add_inb_buffer - Add buffer to the MPC85xx inbound message queue 9346ec4bedbSLiu Gang * @mport: Master port implementing the inbound message unit 9356ec4bedbSLiu Gang * @mbox: Inbound mailbox number 9366ec4bedbSLiu Gang * @buf: Buffer to add to inbound queue 9376ec4bedbSLiu Gang * 9386ec4bedbSLiu Gang * Adds the @buf buffer to the MPC85xx inbound message queue. Returns 9396ec4bedbSLiu Gang * %0 on success or %-EINVAL on failure. 9406ec4bedbSLiu Gang */ 941abc3aeaeSLiu Gang int fsl_add_inb_buffer(struct rio_mport *mport, int mbox, void *buf) 9426ec4bedbSLiu Gang { 9436ec4bedbSLiu Gang int rc = 0; 9446ec4bedbSLiu Gang struct fsl_rmu *rmu = GET_RMM_HANDLE(mport); 9456ec4bedbSLiu Gang 9466ec4bedbSLiu Gang pr_debug("RIO: fsl_add_inb_buffer(), msg_rx_ring.rx_slot %d\n", 9476ec4bedbSLiu Gang rmu->msg_rx_ring.rx_slot); 9486ec4bedbSLiu Gang 9496ec4bedbSLiu Gang if (rmu->msg_rx_ring.virt_buffer[rmu->msg_rx_ring.rx_slot]) { 9506ec4bedbSLiu Gang printk(KERN_ERR 9516ec4bedbSLiu Gang "RIO: error adding inbound buffer %d, buffer exists\n", 9526ec4bedbSLiu Gang rmu->msg_rx_ring.rx_slot); 9536ec4bedbSLiu Gang rc = -EINVAL; 9546ec4bedbSLiu Gang goto out; 9556ec4bedbSLiu Gang } 9566ec4bedbSLiu Gang 9576ec4bedbSLiu Gang rmu->msg_rx_ring.virt_buffer[rmu->msg_rx_ring.rx_slot] = buf; 9586ec4bedbSLiu Gang if (++rmu->msg_rx_ring.rx_slot == rmu->msg_rx_ring.size) 9596ec4bedbSLiu Gang rmu->msg_rx_ring.rx_slot = 0; 9606ec4bedbSLiu Gang 9616ec4bedbSLiu Gang out: 9626ec4bedbSLiu Gang return rc; 9636ec4bedbSLiu Gang } 9646ec4bedbSLiu Gang 9656ec4bedbSLiu Gang /** 9666ec4bedbSLiu Gang * fsl_get_inb_message - Fetch inbound message from the MPC85xx message unit 9676ec4bedbSLiu Gang * @mport: Master port implementing the inbound message unit 9686ec4bedbSLiu Gang * @mbox: Inbound mailbox number 9696ec4bedbSLiu Gang * 9706ec4bedbSLiu Gang * Gets the next available inbound message from the inbound message queue. 9716ec4bedbSLiu Gang * A pointer to the message is returned on success or NULL on failure. 9726ec4bedbSLiu Gang */ 973abc3aeaeSLiu Gang void *fsl_get_inb_message(struct rio_mport *mport, int mbox) 9746ec4bedbSLiu Gang { 9756ec4bedbSLiu Gang struct fsl_rmu *rmu = GET_RMM_HANDLE(mport); 976*2a2383daSLiu Gang u32 phys_buf; 977*2a2383daSLiu Gang void *virt_buf; 9786ec4bedbSLiu Gang void *buf = NULL; 9796ec4bedbSLiu Gang int buf_idx; 9806ec4bedbSLiu Gang 9816ec4bedbSLiu Gang phys_buf = in_be32(&rmu->msg_regs->ifqdpar); 9826ec4bedbSLiu Gang 9836ec4bedbSLiu Gang /* If no more messages, then bail out */ 9846ec4bedbSLiu Gang if (phys_buf == in_be32(&rmu->msg_regs->ifqepar)) 9856ec4bedbSLiu Gang goto out2; 9866ec4bedbSLiu Gang 987*2a2383daSLiu Gang virt_buf = rmu->msg_rx_ring.virt + (phys_buf 9886ec4bedbSLiu Gang - rmu->msg_rx_ring.phys); 9896ec4bedbSLiu Gang buf_idx = (phys_buf - rmu->msg_rx_ring.phys) / RIO_MAX_MSG_SIZE; 9906ec4bedbSLiu Gang buf = rmu->msg_rx_ring.virt_buffer[buf_idx]; 9916ec4bedbSLiu Gang 9926ec4bedbSLiu Gang if (!buf) { 9936ec4bedbSLiu Gang printk(KERN_ERR 9946ec4bedbSLiu Gang "RIO: inbound message copy failed, no buffers\n"); 9956ec4bedbSLiu Gang goto out1; 9966ec4bedbSLiu Gang } 9976ec4bedbSLiu Gang 9986ec4bedbSLiu Gang /* Copy max message size, caller is expected to allocate that big */ 999*2a2383daSLiu Gang memcpy(buf, virt_buf, RIO_MAX_MSG_SIZE); 10006ec4bedbSLiu Gang 10016ec4bedbSLiu Gang /* Clear the available buffer */ 10026ec4bedbSLiu Gang rmu->msg_rx_ring.virt_buffer[buf_idx] = NULL; 10036ec4bedbSLiu Gang 10046ec4bedbSLiu Gang out1: 10056ec4bedbSLiu Gang setbits32(&rmu->msg_regs->imr, RIO_MSG_IMR_MI); 10066ec4bedbSLiu Gang 10076ec4bedbSLiu Gang out2: 10086ec4bedbSLiu Gang return buf; 10096ec4bedbSLiu Gang } 10106ec4bedbSLiu Gang 10116ec4bedbSLiu Gang /** 10126ec4bedbSLiu Gang * fsl_rio_doorbell_init - MPC85xx doorbell interface init 10136ec4bedbSLiu Gang * @mport: Master port implementing the inbound doorbell unit 10146ec4bedbSLiu Gang * 10156ec4bedbSLiu Gang * Initializes doorbell unit hardware and inbound DMA buffer 10166ec4bedbSLiu Gang * ring. Called from fsl_rio_setup(). Returns %0 on success 10176ec4bedbSLiu Gang * or %-ENOMEM on failure. 10186ec4bedbSLiu Gang */ 1019abc3aeaeSLiu Gang int fsl_rio_doorbell_init(struct fsl_rio_dbell *dbell) 10206ec4bedbSLiu Gang { 10216ec4bedbSLiu Gang int rc = 0; 10226ec4bedbSLiu Gang 10236ec4bedbSLiu Gang /* Initialize inbound doorbells */ 1024abc3aeaeSLiu Gang dbell->dbell_ring.virt = dma_alloc_coherent(dbell->dev, 512 * 1025abc3aeaeSLiu Gang DOORBELL_MESSAGE_SIZE, &dbell->dbell_ring.phys, GFP_KERNEL); 1026abc3aeaeSLiu Gang if (!dbell->dbell_ring.virt) { 10276ec4bedbSLiu Gang printk(KERN_ERR "RIO: unable allocate inbound doorbell ring\n"); 10286ec4bedbSLiu Gang rc = -ENOMEM; 10296ec4bedbSLiu Gang goto out; 10306ec4bedbSLiu Gang } 10316ec4bedbSLiu Gang 10326ec4bedbSLiu Gang /* Point dequeue/enqueue pointers at first entry in ring */ 1033abc3aeaeSLiu Gang out_be32(&dbell->dbell_regs->dqdpar, (u32) dbell->dbell_ring.phys); 1034abc3aeaeSLiu Gang out_be32(&dbell->dbell_regs->dqepar, (u32) dbell->dbell_ring.phys); 10356ec4bedbSLiu Gang 10366ec4bedbSLiu Gang /* Clear interrupt status */ 1037abc3aeaeSLiu Gang out_be32(&dbell->dbell_regs->dsr, 0x00000091); 10386ec4bedbSLiu Gang 10396ec4bedbSLiu Gang /* Hook up doorbell handler */ 1040abc3aeaeSLiu Gang rc = request_irq(IRQ_RIO_BELL(dbell), fsl_rio_dbell_handler, 0, 1041abc3aeaeSLiu Gang "dbell_rx", (void *)dbell); 10426ec4bedbSLiu Gang if (rc < 0) { 1043abc3aeaeSLiu Gang dma_free_coherent(dbell->dev, 512 * DOORBELL_MESSAGE_SIZE, 1044abc3aeaeSLiu Gang dbell->dbell_ring.virt, dbell->dbell_ring.phys); 10456ec4bedbSLiu Gang printk(KERN_ERR 10466ec4bedbSLiu Gang "MPC85xx RIO: unable to request inbound doorbell irq"); 10476ec4bedbSLiu Gang goto out; 10486ec4bedbSLiu Gang } 10496ec4bedbSLiu Gang 10506ec4bedbSLiu Gang /* Configure doorbells for snooping, 512 entries, and enable */ 1051abc3aeaeSLiu Gang out_be32(&dbell->dbell_regs->dmr, 0x00108161); 10526ec4bedbSLiu Gang 10536ec4bedbSLiu Gang out: 10546ec4bedbSLiu Gang return rc; 10556ec4bedbSLiu Gang } 10566ec4bedbSLiu Gang 10576ec4bedbSLiu Gang int fsl_rio_setup_rmu(struct rio_mport *mport, struct device_node *node) 10586ec4bedbSLiu Gang { 10596ec4bedbSLiu Gang struct rio_priv *priv; 10606ec4bedbSLiu Gang struct fsl_rmu *rmu; 1061abc3aeaeSLiu Gang u64 msg_start; 1062abc3aeaeSLiu Gang const u32 *msg_addr; 1063abc3aeaeSLiu Gang int mlen; 1064abc3aeaeSLiu Gang int aw; 10656ec4bedbSLiu Gang 1066abc3aeaeSLiu Gang if (!mport || !mport->priv) 1067abc3aeaeSLiu Gang return -EINVAL; 1068abc3aeaeSLiu Gang 1069abc3aeaeSLiu Gang priv = mport->priv; 1070abc3aeaeSLiu Gang 1071abc3aeaeSLiu Gang if (!node) { 1072abc3aeaeSLiu Gang dev_warn(priv->dev, "Can't get %s property 'fsl,rmu'\n", 1073abc3aeaeSLiu Gang priv->dev->of_node->full_name); 1074abc3aeaeSLiu Gang return -EINVAL; 1075abc3aeaeSLiu Gang } 10766ec4bedbSLiu Gang 10776ec4bedbSLiu Gang rmu = kzalloc(sizeof(struct fsl_rmu), GFP_KERNEL); 10786ec4bedbSLiu Gang if (!rmu) 10796ec4bedbSLiu Gang return -ENOMEM; 10806ec4bedbSLiu Gang 1081abc3aeaeSLiu Gang aw = of_n_addr_cells(node); 1082abc3aeaeSLiu Gang msg_addr = of_get_property(node, "reg", &mlen); 1083abc3aeaeSLiu Gang if (!msg_addr) { 1084abc3aeaeSLiu Gang pr_err("%s: unable to find 'reg' property of message-unit\n", 1085abc3aeaeSLiu Gang node->full_name); 1086c6ca52adSJulia Lawall kfree(rmu); 1087abc3aeaeSLiu Gang return -ENOMEM; 1088abc3aeaeSLiu Gang } 1089abc3aeaeSLiu Gang msg_start = of_read_number(msg_addr, aw); 1090abc3aeaeSLiu Gang 1091abc3aeaeSLiu Gang rmu->msg_regs = (struct rio_msg_regs *) 1092abc3aeaeSLiu Gang (rmu_regs_win + (u32)msg_start); 1093abc3aeaeSLiu Gang 1094abc3aeaeSLiu Gang rmu->txirq = irq_of_parse_and_map(node, 0); 1095abc3aeaeSLiu Gang rmu->rxirq = irq_of_parse_and_map(node, 1); 1096abc3aeaeSLiu Gang printk(KERN_INFO "%s: txirq: %d, rxirq %d\n", 1097abc3aeaeSLiu Gang node->full_name, rmu->txirq, rmu->rxirq); 1098abc3aeaeSLiu Gang 10996ec4bedbSLiu Gang priv->rmm_handle = rmu; 11006ec4bedbSLiu Gang 11016ec4bedbSLiu Gang rio_init_dbell_res(&mport->riores[RIO_DOORBELL_RESOURCE], 0, 0xffff); 11026ec4bedbSLiu Gang rio_init_mbox_res(&mport->riores[RIO_INB_MBOX_RESOURCE], 0, 0); 11036ec4bedbSLiu Gang rio_init_mbox_res(&mport->riores[RIO_OUTB_MBOX_RESOURCE], 0, 0); 11046ec4bedbSLiu Gang 11056ec4bedbSLiu Gang return 0; 11066ec4bedbSLiu Gang } 1107