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![Rafał Miłecki](/assets/img/avatar_default.png)
Replace a magic number with a PCI #define symbol. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Alexandre Bounine <alexandre.bounine@idt.com>
2518 lines
70 KiB
C
2518 lines
70 KiB
C
/*
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* RapidIO mport driver for Tsi721 PCIExpress-to-SRIO bridge
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*
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* Copyright 2011 Integrated Device Technology, Inc.
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* Alexandre Bounine <alexandre.bounine@idt.com>
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* Chul Kim <chul.kim@idt.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <linux/io.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/rio.h>
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#include <linux/rio_drv.h>
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#include <linux/dma-mapping.h>
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#include <linux/interrupt.h>
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#include <linux/kfifo.h>
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#include <linux/delay.h>
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#include "tsi721.h"
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#define DEBUG_PW /* Inbound Port-Write debugging */
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static void tsi721_omsg_handler(struct tsi721_device *priv, int ch);
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static void tsi721_imsg_handler(struct tsi721_device *priv, int ch);
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/**
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* tsi721_lcread - read from local SREP config space
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* @mport: RapidIO master port info
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* @index: ID of RapdiIO interface
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* @offset: Offset into configuration space
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* @len: Length (in bytes) of the maintenance transaction
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* @data: Value to be read into
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*
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* Generates a local SREP space read. Returns %0 on
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* success or %-EINVAL on failure.
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*/
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static int tsi721_lcread(struct rio_mport *mport, int index, u32 offset,
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int len, u32 *data)
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{
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struct tsi721_device *priv = mport->priv;
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if (len != sizeof(u32))
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return -EINVAL; /* only 32-bit access is supported */
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*data = ioread32(priv->regs + offset);
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return 0;
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}
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/**
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* tsi721_lcwrite - write into local SREP config space
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* @mport: RapidIO master port info
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* @index: ID of RapdiIO interface
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* @offset: Offset into configuration space
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* @len: Length (in bytes) of the maintenance transaction
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* @data: Value to be written
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*
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* Generates a local write into SREP configuration space. Returns %0 on
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* success or %-EINVAL on failure.
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*/
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static int tsi721_lcwrite(struct rio_mport *mport, int index, u32 offset,
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int len, u32 data)
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{
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struct tsi721_device *priv = mport->priv;
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if (len != sizeof(u32))
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return -EINVAL; /* only 32-bit access is supported */
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iowrite32(data, priv->regs + offset);
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return 0;
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}
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/**
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* tsi721_maint_dma - Helper function to generate RapidIO maintenance
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* transactions using designated Tsi721 DMA channel.
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* @priv: pointer to tsi721 private data
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* @sys_size: RapdiIO transport system size
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* @destid: Destination ID of transaction
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* @hopcount: Number of hops to target device
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* @offset: Offset into configuration space
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* @len: Length (in bytes) of the maintenance transaction
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* @data: Location to be read from or write into
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* @do_wr: Operation flag (1 == MAINT_WR)
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*
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* Generates a RapidIO maintenance transaction (Read or Write).
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* Returns %0 on success and %-EINVAL or %-EFAULT on failure.
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*/
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static int tsi721_maint_dma(struct tsi721_device *priv, u32 sys_size,
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u16 destid, u8 hopcount, u32 offset, int len,
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u32 *data, int do_wr)
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{
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void __iomem *regs = priv->regs + TSI721_DMAC_BASE(priv->mdma.ch_id);
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struct tsi721_dma_desc *bd_ptr;
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u32 rd_count, swr_ptr, ch_stat;
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int i, err = 0;
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u32 op = do_wr ? MAINT_WR : MAINT_RD;
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if (offset > (RIO_MAINT_SPACE_SZ - len) || (len != sizeof(u32)))
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return -EINVAL;
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bd_ptr = priv->mdma.bd_base;
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rd_count = ioread32(regs + TSI721_DMAC_DRDCNT);
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/* Initialize DMA descriptor */
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bd_ptr[0].type_id = cpu_to_le32((DTYPE2 << 29) | (op << 19) | destid);
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bd_ptr[0].bcount = cpu_to_le32((sys_size << 26) | 0x04);
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bd_ptr[0].raddr_lo = cpu_to_le32((hopcount << 24) | offset);
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bd_ptr[0].raddr_hi = 0;
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if (do_wr)
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bd_ptr[0].data[0] = cpu_to_be32p(data);
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else
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bd_ptr[0].data[0] = 0xffffffff;
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mb();
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/* Start DMA operation */
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iowrite32(rd_count + 2, regs + TSI721_DMAC_DWRCNT);
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ioread32(regs + TSI721_DMAC_DWRCNT);
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i = 0;
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/* Wait until DMA transfer is finished */
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while ((ch_stat = ioread32(regs + TSI721_DMAC_STS))
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& TSI721_DMAC_STS_RUN) {
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udelay(1);
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if (++i >= 5000000) {
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dev_dbg(&priv->pdev->dev,
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"%s : DMA[%d] read timeout ch_status=%x\n",
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__func__, priv->mdma.ch_id, ch_stat);
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if (!do_wr)
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*data = 0xffffffff;
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err = -EIO;
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goto err_out;
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}
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}
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if (ch_stat & TSI721_DMAC_STS_ABORT) {
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/* If DMA operation aborted due to error,
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* reinitialize DMA channel
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*/
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dev_dbg(&priv->pdev->dev, "%s : DMA ABORT ch_stat=%x\n",
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__func__, ch_stat);
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dev_dbg(&priv->pdev->dev, "OP=%d : destid=%x hc=%x off=%x\n",
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do_wr ? MAINT_WR : MAINT_RD, destid, hopcount, offset);
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iowrite32(TSI721_DMAC_INT_ALL, regs + TSI721_DMAC_INT);
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iowrite32(TSI721_DMAC_CTL_INIT, regs + TSI721_DMAC_CTL);
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udelay(10);
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iowrite32(0, regs + TSI721_DMAC_DWRCNT);
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udelay(1);
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if (!do_wr)
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*data = 0xffffffff;
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err = -EIO;
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goto err_out;
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}
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if (!do_wr)
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*data = be32_to_cpu(bd_ptr[0].data[0]);
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/*
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* Update descriptor status FIFO RD pointer.
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* NOTE: Skipping check and clear FIFO entries because we are waiting
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* for transfer to be completed.
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*/
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swr_ptr = ioread32(regs + TSI721_DMAC_DSWP);
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iowrite32(swr_ptr, regs + TSI721_DMAC_DSRP);
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err_out:
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return err;
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}
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/**
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* tsi721_cread_dma - Generate a RapidIO maintenance read transaction
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* using Tsi721 BDMA engine.
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* @mport: RapidIO master port control structure
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* @index: ID of RapdiIO interface
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* @destid: Destination ID of transaction
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* @hopcount: Number of hops to target device
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* @offset: Offset into configuration space
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* @len: Length (in bytes) of the maintenance transaction
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* @val: Location to be read into
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*
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* Generates a RapidIO maintenance read transaction.
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* Returns %0 on success and %-EINVAL or %-EFAULT on failure.
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*/
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static int tsi721_cread_dma(struct rio_mport *mport, int index, u16 destid,
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u8 hopcount, u32 offset, int len, u32 *data)
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{
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struct tsi721_device *priv = mport->priv;
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return tsi721_maint_dma(priv, mport->sys_size, destid, hopcount,
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offset, len, data, 0);
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}
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/**
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* tsi721_cwrite_dma - Generate a RapidIO maintenance write transaction
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* using Tsi721 BDMA engine
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* @mport: RapidIO master port control structure
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* @index: ID of RapdiIO interface
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* @destid: Destination ID of transaction
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* @hopcount: Number of hops to target device
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* @offset: Offset into configuration space
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* @len: Length (in bytes) of the maintenance transaction
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* @val: Value to be written
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*
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* Generates a RapidIO maintenance write transaction.
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* Returns %0 on success and %-EINVAL or %-EFAULT on failure.
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*/
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static int tsi721_cwrite_dma(struct rio_mport *mport, int index, u16 destid,
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u8 hopcount, u32 offset, int len, u32 data)
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{
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struct tsi721_device *priv = mport->priv;
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u32 temp = data;
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return tsi721_maint_dma(priv, mport->sys_size, destid, hopcount,
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offset, len, &temp, 1);
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}
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/**
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* tsi721_pw_handler - Tsi721 inbound port-write interrupt handler
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* @mport: RapidIO master port structure
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*
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* Handles inbound port-write interrupts. Copies PW message from an internal
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* buffer into PW message FIFO and schedules deferred routine to process
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* queued messages.
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*/
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static int
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tsi721_pw_handler(struct rio_mport *mport)
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{
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struct tsi721_device *priv = mport->priv;
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u32 pw_stat;
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u32 pw_buf[TSI721_RIO_PW_MSG_SIZE/sizeof(u32)];
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pw_stat = ioread32(priv->regs + TSI721_RIO_PW_RX_STAT);
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if (pw_stat & TSI721_RIO_PW_RX_STAT_PW_VAL) {
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pw_buf[0] = ioread32(priv->regs + TSI721_RIO_PW_RX_CAPT(0));
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pw_buf[1] = ioread32(priv->regs + TSI721_RIO_PW_RX_CAPT(1));
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pw_buf[2] = ioread32(priv->regs + TSI721_RIO_PW_RX_CAPT(2));
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pw_buf[3] = ioread32(priv->regs + TSI721_RIO_PW_RX_CAPT(3));
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/* Queue PW message (if there is room in FIFO),
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* otherwise discard it.
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*/
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spin_lock(&priv->pw_fifo_lock);
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if (kfifo_avail(&priv->pw_fifo) >= TSI721_RIO_PW_MSG_SIZE)
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kfifo_in(&priv->pw_fifo, pw_buf,
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TSI721_RIO_PW_MSG_SIZE);
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else
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priv->pw_discard_count++;
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spin_unlock(&priv->pw_fifo_lock);
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}
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/* Clear pending PW interrupts */
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iowrite32(TSI721_RIO_PW_RX_STAT_PW_DISC | TSI721_RIO_PW_RX_STAT_PW_VAL,
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priv->regs + TSI721_RIO_PW_RX_STAT);
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schedule_work(&priv->pw_work);
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return 0;
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}
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static void tsi721_pw_dpc(struct work_struct *work)
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{
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struct tsi721_device *priv = container_of(work, struct tsi721_device,
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pw_work);
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u32 msg_buffer[RIO_PW_MSG_SIZE/sizeof(u32)]; /* Use full size PW message
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buffer for RIO layer */
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/*
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* Process port-write messages
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*/
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while (kfifo_out_spinlocked(&priv->pw_fifo, (unsigned char *)msg_buffer,
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TSI721_RIO_PW_MSG_SIZE, &priv->pw_fifo_lock)) {
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/* Process one message */
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#ifdef DEBUG_PW
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{
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u32 i;
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pr_debug("%s : Port-Write Message:", __func__);
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for (i = 0; i < RIO_PW_MSG_SIZE/sizeof(u32); ) {
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pr_debug("0x%02x: %08x %08x %08x %08x", i*4,
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msg_buffer[i], msg_buffer[i + 1],
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msg_buffer[i + 2], msg_buffer[i + 3]);
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i += 4;
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}
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pr_debug("\n");
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}
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#endif
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/* Pass the port-write message to RIO core for processing */
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rio_inb_pwrite_handler((union rio_pw_msg *)msg_buffer);
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}
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}
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/**
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* tsi721_pw_enable - enable/disable port-write interface init
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* @mport: Master port implementing the port write unit
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* @enable: 1=enable; 0=disable port-write message handling
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*/
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static int tsi721_pw_enable(struct rio_mport *mport, int enable)
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{
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struct tsi721_device *priv = mport->priv;
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u32 rval;
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rval = ioread32(priv->regs + TSI721_RIO_EM_INT_ENABLE);
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if (enable)
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rval |= TSI721_RIO_EM_INT_ENABLE_PW_RX;
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else
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rval &= ~TSI721_RIO_EM_INT_ENABLE_PW_RX;
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/* Clear pending PW interrupts */
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iowrite32(TSI721_RIO_PW_RX_STAT_PW_DISC | TSI721_RIO_PW_RX_STAT_PW_VAL,
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priv->regs + TSI721_RIO_PW_RX_STAT);
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/* Update enable bits */
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iowrite32(rval, priv->regs + TSI721_RIO_EM_INT_ENABLE);
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return 0;
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}
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/**
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* tsi721_dsend - Send a RapidIO doorbell
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* @mport: RapidIO master port info
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* @index: ID of RapidIO interface
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* @destid: Destination ID of target device
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* @data: 16-bit info field of RapidIO doorbell
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*
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* Sends a RapidIO doorbell message. Always returns %0.
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*/
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static int tsi721_dsend(struct rio_mport *mport, int index,
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u16 destid, u16 data)
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{
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struct tsi721_device *priv = mport->priv;
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u32 offset;
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offset = (((mport->sys_size) ? RIO_TT_CODE_16 : RIO_TT_CODE_8) << 18) |
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(destid << 2);
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dev_dbg(&priv->pdev->dev,
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"Send Doorbell 0x%04x to destID 0x%x\n", data, destid);
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iowrite16be(data, priv->odb_base + offset);
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return 0;
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}
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/**
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* tsi721_dbell_handler - Tsi721 doorbell interrupt handler
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* @mport: RapidIO master port structure
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*
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* Handles inbound doorbell interrupts. Copies doorbell entry from an internal
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* buffer into DB message FIFO and schedules deferred routine to process
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* queued DBs.
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*/
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static int
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tsi721_dbell_handler(struct rio_mport *mport)
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{
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struct tsi721_device *priv = mport->priv;
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u32 regval;
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/* Disable IDB interrupts */
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regval = ioread32(priv->regs + TSI721_SR_CHINTE(IDB_QUEUE));
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regval &= ~TSI721_SR_CHINT_IDBQRCV;
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iowrite32(regval,
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priv->regs + TSI721_SR_CHINTE(IDB_QUEUE));
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schedule_work(&priv->idb_work);
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return 0;
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}
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|
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static void tsi721_db_dpc(struct work_struct *work)
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{
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struct tsi721_device *priv = container_of(work, struct tsi721_device,
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idb_work);
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struct rio_mport *mport;
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struct rio_dbell *dbell;
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int found = 0;
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u32 wr_ptr, rd_ptr;
|
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u64 *idb_entry;
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u32 regval;
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union {
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u64 msg;
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u8 bytes[8];
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} idb;
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|
|
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/*
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* Process queued inbound doorbells
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*/
|
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mport = priv->mport;
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|
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wr_ptr = ioread32(priv->regs + TSI721_IDQ_WP(IDB_QUEUE)) % IDB_QSIZE;
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rd_ptr = ioread32(priv->regs + TSI721_IDQ_RP(IDB_QUEUE)) % IDB_QSIZE;
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|
|
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while (wr_ptr != rd_ptr) {
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idb_entry = (u64 *)(priv->idb_base +
|
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(TSI721_IDB_ENTRY_SIZE * rd_ptr));
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rd_ptr++;
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rd_ptr %= IDB_QSIZE;
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idb.msg = *idb_entry;
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*idb_entry = 0;
|
|
|
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/* Process one doorbell */
|
|
list_for_each_entry(dbell, &mport->dbells, node) {
|
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if ((dbell->res->start <= DBELL_INF(idb.bytes)) &&
|
|
(dbell->res->end >= DBELL_INF(idb.bytes))) {
|
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found = 1;
|
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break;
|
|
}
|
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}
|
|
|
|
if (found) {
|
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dbell->dinb(mport, dbell->dev_id, DBELL_SID(idb.bytes),
|
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DBELL_TID(idb.bytes), DBELL_INF(idb.bytes));
|
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} else {
|
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dev_dbg(&priv->pdev->dev,
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"spurious inb doorbell, sid %2.2x tid %2.2x"
|
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" info %4.4x\n", DBELL_SID(idb.bytes),
|
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DBELL_TID(idb.bytes), DBELL_INF(idb.bytes));
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}
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|
|
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wr_ptr = ioread32(priv->regs +
|
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TSI721_IDQ_WP(IDB_QUEUE)) % IDB_QSIZE;
|
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}
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|
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iowrite32(rd_ptr & (IDB_QSIZE - 1),
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priv->regs + TSI721_IDQ_RP(IDB_QUEUE));
|
|
|
|
/* Re-enable IDB interrupts */
|
|
regval = ioread32(priv->regs + TSI721_SR_CHINTE(IDB_QUEUE));
|
|
regval |= TSI721_SR_CHINT_IDBQRCV;
|
|
iowrite32(regval,
|
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priv->regs + TSI721_SR_CHINTE(IDB_QUEUE));
|
|
|
|
wr_ptr = ioread32(priv->regs + TSI721_IDQ_WP(IDB_QUEUE)) % IDB_QSIZE;
|
|
if (wr_ptr != rd_ptr)
|
|
schedule_work(&priv->idb_work);
|
|
}
|
|
|
|
/**
|
|
* tsi721_irqhandler - Tsi721 interrupt handler
|
|
* @irq: Linux interrupt number
|
|
* @ptr: Pointer to interrupt-specific data (mport structure)
|
|
*
|
|
* Handles Tsi721 interrupts signaled using MSI and INTA. Checks reported
|
|
* interrupt events and calls an event-specific handler(s).
|
|
*/
|
|
static irqreturn_t tsi721_irqhandler(int irq, void *ptr)
|
|
{
|
|
struct rio_mport *mport = (struct rio_mport *)ptr;
|
|
struct tsi721_device *priv = mport->priv;
|
|
u32 dev_int;
|
|
u32 dev_ch_int;
|
|
u32 intval;
|
|
u32 ch_inte;
|
|
|
|
/* For MSI mode disable all device-level interrupts */
|
|
if (priv->flags & TSI721_USING_MSI)
|
|
iowrite32(0, priv->regs + TSI721_DEV_INTE);
|
|
|
|
dev_int = ioread32(priv->regs + TSI721_DEV_INT);
|
|
if (!dev_int)
|
|
return IRQ_NONE;
|
|
|
|
dev_ch_int = ioread32(priv->regs + TSI721_DEV_CHAN_INT);
|
|
|
|
if (dev_int & TSI721_DEV_INT_SR2PC_CH) {
|
|
/* Service SR2PC Channel interrupts */
|
|
if (dev_ch_int & TSI721_INT_SR2PC_CHAN(IDB_QUEUE)) {
|
|
/* Service Inbound Doorbell interrupt */
|
|
intval = ioread32(priv->regs +
|
|
TSI721_SR_CHINT(IDB_QUEUE));
|
|
if (intval & TSI721_SR_CHINT_IDBQRCV)
|
|
tsi721_dbell_handler(mport);
|
|
else
|
|
dev_info(&priv->pdev->dev,
|
|
"Unsupported SR_CH_INT %x\n", intval);
|
|
|
|
/* Clear interrupts */
|
|
iowrite32(intval,
|
|
priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
|
|
ioread32(priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
|
|
}
|
|
}
|
|
|
|
if (dev_int & TSI721_DEV_INT_SMSG_CH) {
|
|
int ch;
|
|
|
|
/*
|
|
* Service channel interrupts from Messaging Engine
|
|
*/
|
|
|
|
if (dev_ch_int & TSI721_INT_IMSG_CHAN_M) { /* Inbound Msg */
|
|
/* Disable signaled OB MSG Channel interrupts */
|
|
ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
|
|
ch_inte &= ~(dev_ch_int & TSI721_INT_IMSG_CHAN_M);
|
|
iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE);
|
|
|
|
/*
|
|
* Process Inbound Message interrupt for each MBOX
|
|
*/
|
|
for (ch = 4; ch < RIO_MAX_MBOX + 4; ch++) {
|
|
if (!(dev_ch_int & TSI721_INT_IMSG_CHAN(ch)))
|
|
continue;
|
|
tsi721_imsg_handler(priv, ch);
|
|
}
|
|
}
|
|
|
|
if (dev_ch_int & TSI721_INT_OMSG_CHAN_M) { /* Outbound Msg */
|
|
/* Disable signaled OB MSG Channel interrupts */
|
|
ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
|
|
ch_inte &= ~(dev_ch_int & TSI721_INT_OMSG_CHAN_M);
|
|
iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE);
|
|
|
|
/*
|
|
* Process Outbound Message interrupts for each MBOX
|
|
*/
|
|
|
|
for (ch = 0; ch < RIO_MAX_MBOX; ch++) {
|
|
if (!(dev_ch_int & TSI721_INT_OMSG_CHAN(ch)))
|
|
continue;
|
|
tsi721_omsg_handler(priv, ch);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (dev_int & TSI721_DEV_INT_SRIO) {
|
|
/* Service SRIO MAC interrupts */
|
|
intval = ioread32(priv->regs + TSI721_RIO_EM_INT_STAT);
|
|
if (intval & TSI721_RIO_EM_INT_STAT_PW_RX)
|
|
tsi721_pw_handler(mport);
|
|
}
|
|
|
|
#ifdef CONFIG_RAPIDIO_DMA_ENGINE
|
|
if (dev_int & TSI721_DEV_INT_BDMA_CH) {
|
|
int ch;
|
|
|
|
if (dev_ch_int & TSI721_INT_BDMA_CHAN_M) {
|
|
dev_dbg(&priv->pdev->dev,
|
|
"IRQ from DMA channel 0x%08x\n", dev_ch_int);
|
|
|
|
for (ch = 0; ch < TSI721_DMA_MAXCH; ch++) {
|
|
if (!(dev_ch_int & TSI721_INT_BDMA_CHAN(ch)))
|
|
continue;
|
|
tsi721_bdma_handler(&priv->bdma[ch]);
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* For MSI mode re-enable device-level interrupts */
|
|
if (priv->flags & TSI721_USING_MSI) {
|
|
dev_int = TSI721_DEV_INT_SR2PC_CH | TSI721_DEV_INT_SRIO |
|
|
TSI721_DEV_INT_SMSG_CH | TSI721_DEV_INT_BDMA_CH;
|
|
iowrite32(dev_int, priv->regs + TSI721_DEV_INTE);
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static void tsi721_interrupts_init(struct tsi721_device *priv)
|
|
{
|
|
u32 intr;
|
|
|
|
/* Enable IDB interrupts */
|
|
iowrite32(TSI721_SR_CHINT_ALL,
|
|
priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
|
|
iowrite32(TSI721_SR_CHINT_IDBQRCV,
|
|
priv->regs + TSI721_SR_CHINTE(IDB_QUEUE));
|
|
|
|
/* Enable SRIO MAC interrupts */
|
|
iowrite32(TSI721_RIO_EM_DEV_INT_EN_INT,
|
|
priv->regs + TSI721_RIO_EM_DEV_INT_EN);
|
|
|
|
/* Enable interrupts from channels in use */
|
|
#ifdef CONFIG_RAPIDIO_DMA_ENGINE
|
|
intr = TSI721_INT_SR2PC_CHAN(IDB_QUEUE) |
|
|
(TSI721_INT_BDMA_CHAN_M &
|
|
~TSI721_INT_BDMA_CHAN(TSI721_DMACH_MAINT));
|
|
#else
|
|
intr = TSI721_INT_SR2PC_CHAN(IDB_QUEUE);
|
|
#endif
|
|
iowrite32(intr, priv->regs + TSI721_DEV_CHAN_INTE);
|
|
|
|
if (priv->flags & TSI721_USING_MSIX)
|
|
intr = TSI721_DEV_INT_SRIO;
|
|
else
|
|
intr = TSI721_DEV_INT_SR2PC_CH | TSI721_DEV_INT_SRIO |
|
|
TSI721_DEV_INT_SMSG_CH | TSI721_DEV_INT_BDMA_CH;
|
|
|
|
iowrite32(intr, priv->regs + TSI721_DEV_INTE);
|
|
ioread32(priv->regs + TSI721_DEV_INTE);
|
|
}
|
|
|
|
#ifdef CONFIG_PCI_MSI
|
|
/**
|
|
* tsi721_omsg_msix - MSI-X interrupt handler for outbound messaging
|
|
* @irq: Linux interrupt number
|
|
* @ptr: Pointer to interrupt-specific data (mport structure)
|
|
*
|
|
* Handles outbound messaging interrupts signaled using MSI-X.
|
|
*/
|
|
static irqreturn_t tsi721_omsg_msix(int irq, void *ptr)
|
|
{
|
|
struct tsi721_device *priv = ((struct rio_mport *)ptr)->priv;
|
|
int mbox;
|
|
|
|
mbox = (irq - priv->msix[TSI721_VECT_OMB0_DONE].vector) % RIO_MAX_MBOX;
|
|
tsi721_omsg_handler(priv, mbox);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/**
|
|
* tsi721_imsg_msix - MSI-X interrupt handler for inbound messaging
|
|
* @irq: Linux interrupt number
|
|
* @ptr: Pointer to interrupt-specific data (mport structure)
|
|
*
|
|
* Handles inbound messaging interrupts signaled using MSI-X.
|
|
*/
|
|
static irqreturn_t tsi721_imsg_msix(int irq, void *ptr)
|
|
{
|
|
struct tsi721_device *priv = ((struct rio_mport *)ptr)->priv;
|
|
int mbox;
|
|
|
|
mbox = (irq - priv->msix[TSI721_VECT_IMB0_RCV].vector) % RIO_MAX_MBOX;
|
|
tsi721_imsg_handler(priv, mbox + 4);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/**
|
|
* tsi721_srio_msix - Tsi721 MSI-X SRIO MAC interrupt handler
|
|
* @irq: Linux interrupt number
|
|
* @ptr: Pointer to interrupt-specific data (mport structure)
|
|
*
|
|
* Handles Tsi721 interrupts from SRIO MAC.
|
|
*/
|
|
static irqreturn_t tsi721_srio_msix(int irq, void *ptr)
|
|
{
|
|
struct tsi721_device *priv = ((struct rio_mport *)ptr)->priv;
|
|
u32 srio_int;
|
|
|
|
/* Service SRIO MAC interrupts */
|
|
srio_int = ioread32(priv->regs + TSI721_RIO_EM_INT_STAT);
|
|
if (srio_int & TSI721_RIO_EM_INT_STAT_PW_RX)
|
|
tsi721_pw_handler((struct rio_mport *)ptr);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/**
|
|
* tsi721_sr2pc_ch_msix - Tsi721 MSI-X SR2PC Channel interrupt handler
|
|
* @irq: Linux interrupt number
|
|
* @ptr: Pointer to interrupt-specific data (mport structure)
|
|
*
|
|
* Handles Tsi721 interrupts from SR2PC Channel.
|
|
* NOTE: At this moment services only one SR2PC channel associated with inbound
|
|
* doorbells.
|
|
*/
|
|
static irqreturn_t tsi721_sr2pc_ch_msix(int irq, void *ptr)
|
|
{
|
|
struct tsi721_device *priv = ((struct rio_mport *)ptr)->priv;
|
|
u32 sr_ch_int;
|
|
|
|
/* Service Inbound DB interrupt from SR2PC channel */
|
|
sr_ch_int = ioread32(priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
|
|
if (sr_ch_int & TSI721_SR_CHINT_IDBQRCV)
|
|
tsi721_dbell_handler((struct rio_mport *)ptr);
|
|
|
|
/* Clear interrupts */
|
|
iowrite32(sr_ch_int, priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
|
|
/* Read back to ensure that interrupt was cleared */
|
|
sr_ch_int = ioread32(priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/**
|
|
* tsi721_request_msix - register interrupt service for MSI-X mode.
|
|
* @mport: RapidIO master port structure
|
|
*
|
|
* Registers MSI-X interrupt service routines for interrupts that are active
|
|
* immediately after mport initialization. Messaging interrupt service routines
|
|
* should be registered during corresponding open requests.
|
|
*/
|
|
static int tsi721_request_msix(struct rio_mport *mport)
|
|
{
|
|
struct tsi721_device *priv = mport->priv;
|
|
int err = 0;
|
|
|
|
err = request_irq(priv->msix[TSI721_VECT_IDB].vector,
|
|
tsi721_sr2pc_ch_msix, 0,
|
|
priv->msix[TSI721_VECT_IDB].irq_name, (void *)mport);
|
|
if (err)
|
|
goto out;
|
|
|
|
err = request_irq(priv->msix[TSI721_VECT_PWRX].vector,
|
|
tsi721_srio_msix, 0,
|
|
priv->msix[TSI721_VECT_PWRX].irq_name, (void *)mport);
|
|
if (err)
|
|
free_irq(
|
|
priv->msix[TSI721_VECT_IDB].vector,
|
|
(void *)mport);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* tsi721_enable_msix - Attempts to enable MSI-X support for Tsi721.
|
|
* @priv: pointer to tsi721 private data
|
|
*
|
|
* Configures MSI-X support for Tsi721. Supports only an exact number
|
|
* of requested vectors.
|
|
*/
|
|
static int tsi721_enable_msix(struct tsi721_device *priv)
|
|
{
|
|
struct msix_entry entries[TSI721_VECT_MAX];
|
|
int err;
|
|
int i;
|
|
|
|
entries[TSI721_VECT_IDB].entry = TSI721_MSIX_SR2PC_IDBQ_RCV(IDB_QUEUE);
|
|
entries[TSI721_VECT_PWRX].entry = TSI721_MSIX_SRIO_MAC_INT;
|
|
|
|
/*
|
|
* Initialize MSI-X entries for Messaging Engine:
|
|
* this driver supports four RIO mailboxes (inbound and outbound)
|
|
* NOTE: Inbound message MBOX 0...4 use IB channels 4...7. Therefore
|
|
* offset +4 is added to IB MBOX number.
|
|
*/
|
|
for (i = 0; i < RIO_MAX_MBOX; i++) {
|
|
entries[TSI721_VECT_IMB0_RCV + i].entry =
|
|
TSI721_MSIX_IMSG_DQ_RCV(i + 4);
|
|
entries[TSI721_VECT_IMB0_INT + i].entry =
|
|
TSI721_MSIX_IMSG_INT(i + 4);
|
|
entries[TSI721_VECT_OMB0_DONE + i].entry =
|
|
TSI721_MSIX_OMSG_DONE(i);
|
|
entries[TSI721_VECT_OMB0_INT + i].entry =
|
|
TSI721_MSIX_OMSG_INT(i);
|
|
}
|
|
|
|
#ifdef CONFIG_RAPIDIO_DMA_ENGINE
|
|
/*
|
|
* Initialize MSI-X entries for Block DMA Engine:
|
|
* this driver supports XXX DMA channels
|
|
* (one is reserved for SRIO maintenance transactions)
|
|
*/
|
|
for (i = 0; i < TSI721_DMA_CHNUM; i++) {
|
|
entries[TSI721_VECT_DMA0_DONE + i].entry =
|
|
TSI721_MSIX_DMACH_DONE(i);
|
|
entries[TSI721_VECT_DMA0_INT + i].entry =
|
|
TSI721_MSIX_DMACH_INT(i);
|
|
}
|
|
#endif /* CONFIG_RAPIDIO_DMA_ENGINE */
|
|
|
|
err = pci_enable_msix_exact(priv->pdev, entries, ARRAY_SIZE(entries));
|
|
if (err) {
|
|
dev_err(&priv->pdev->dev,
|
|
"Failed to enable MSI-X (err=%d)\n", err);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Copy MSI-X vector information into tsi721 private structure
|
|
*/
|
|
priv->msix[TSI721_VECT_IDB].vector = entries[TSI721_VECT_IDB].vector;
|
|
snprintf(priv->msix[TSI721_VECT_IDB].irq_name, IRQ_DEVICE_NAME_MAX,
|
|
DRV_NAME "-idb@pci:%s", pci_name(priv->pdev));
|
|
priv->msix[TSI721_VECT_PWRX].vector = entries[TSI721_VECT_PWRX].vector;
|
|
snprintf(priv->msix[TSI721_VECT_PWRX].irq_name, IRQ_DEVICE_NAME_MAX,
|
|
DRV_NAME "-pwrx@pci:%s", pci_name(priv->pdev));
|
|
|
|
for (i = 0; i < RIO_MAX_MBOX; i++) {
|
|
priv->msix[TSI721_VECT_IMB0_RCV + i].vector =
|
|
entries[TSI721_VECT_IMB0_RCV + i].vector;
|
|
snprintf(priv->msix[TSI721_VECT_IMB0_RCV + i].irq_name,
|
|
IRQ_DEVICE_NAME_MAX, DRV_NAME "-imbr%d@pci:%s",
|
|
i, pci_name(priv->pdev));
|
|
|
|
priv->msix[TSI721_VECT_IMB0_INT + i].vector =
|
|
entries[TSI721_VECT_IMB0_INT + i].vector;
|
|
snprintf(priv->msix[TSI721_VECT_IMB0_INT + i].irq_name,
|
|
IRQ_DEVICE_NAME_MAX, DRV_NAME "-imbi%d@pci:%s",
|
|
i, pci_name(priv->pdev));
|
|
|
|
priv->msix[TSI721_VECT_OMB0_DONE + i].vector =
|
|
entries[TSI721_VECT_OMB0_DONE + i].vector;
|
|
snprintf(priv->msix[TSI721_VECT_OMB0_DONE + i].irq_name,
|
|
IRQ_DEVICE_NAME_MAX, DRV_NAME "-ombd%d@pci:%s",
|
|
i, pci_name(priv->pdev));
|
|
|
|
priv->msix[TSI721_VECT_OMB0_INT + i].vector =
|
|
entries[TSI721_VECT_OMB0_INT + i].vector;
|
|
snprintf(priv->msix[TSI721_VECT_OMB0_INT + i].irq_name,
|
|
IRQ_DEVICE_NAME_MAX, DRV_NAME "-ombi%d@pci:%s",
|
|
i, pci_name(priv->pdev));
|
|
}
|
|
|
|
#ifdef CONFIG_RAPIDIO_DMA_ENGINE
|
|
for (i = 0; i < TSI721_DMA_CHNUM; i++) {
|
|
priv->msix[TSI721_VECT_DMA0_DONE + i].vector =
|
|
entries[TSI721_VECT_DMA0_DONE + i].vector;
|
|
snprintf(priv->msix[TSI721_VECT_DMA0_DONE + i].irq_name,
|
|
IRQ_DEVICE_NAME_MAX, DRV_NAME "-dmad%d@pci:%s",
|
|
i, pci_name(priv->pdev));
|
|
|
|
priv->msix[TSI721_VECT_DMA0_INT + i].vector =
|
|
entries[TSI721_VECT_DMA0_INT + i].vector;
|
|
snprintf(priv->msix[TSI721_VECT_DMA0_INT + i].irq_name,
|
|
IRQ_DEVICE_NAME_MAX, DRV_NAME "-dmai%d@pci:%s",
|
|
i, pci_name(priv->pdev));
|
|
}
|
|
#endif /* CONFIG_RAPIDIO_DMA_ENGINE */
|
|
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_PCI_MSI */
|
|
|
|
static int tsi721_request_irq(struct rio_mport *mport)
|
|
{
|
|
struct tsi721_device *priv = mport->priv;
|
|
int err;
|
|
|
|
#ifdef CONFIG_PCI_MSI
|
|
if (priv->flags & TSI721_USING_MSIX)
|
|
err = tsi721_request_msix(mport);
|
|
else
|
|
#endif
|
|
err = request_irq(priv->pdev->irq, tsi721_irqhandler,
|
|
(priv->flags & TSI721_USING_MSI) ? 0 : IRQF_SHARED,
|
|
DRV_NAME, (void *)mport);
|
|
|
|
if (err)
|
|
dev_err(&priv->pdev->dev,
|
|
"Unable to allocate interrupt, Error: %d\n", err);
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* tsi721_init_pc2sr_mapping - initializes outbound (PCIe->SRIO)
|
|
* translation regions.
|
|
* @priv: pointer to tsi721 private data
|
|
*
|
|
* Disables SREP translation regions.
|
|
*/
|
|
static void tsi721_init_pc2sr_mapping(struct tsi721_device *priv)
|
|
{
|
|
int i;
|
|
|
|
/* Disable all PC2SR translation windows */
|
|
for (i = 0; i < TSI721_OBWIN_NUM; i++)
|
|
iowrite32(0, priv->regs + TSI721_OBWINLB(i));
|
|
}
|
|
|
|
/**
|
|
* tsi721_rio_map_inb_mem -- Mapping inbound memory region.
|
|
* @mport: RapidIO master port
|
|
* @lstart: Local memory space start address.
|
|
* @rstart: RapidIO space start address.
|
|
* @size: The mapping region size.
|
|
* @flags: Flags for mapping. 0 for using default flags.
|
|
*
|
|
* Return: 0 -- Success.
|
|
*
|
|
* This function will create the inbound mapping
|
|
* from rstart to lstart.
|
|
*/
|
|
static int tsi721_rio_map_inb_mem(struct rio_mport *mport, dma_addr_t lstart,
|
|
u64 rstart, u32 size, u32 flags)
|
|
{
|
|
struct tsi721_device *priv = mport->priv;
|
|
int i;
|
|
u32 regval;
|
|
|
|
if (!is_power_of_2(size) || size < 0x1000 ||
|
|
((u64)lstart & (size - 1)) || (rstart & (size - 1)))
|
|
return -EINVAL;
|
|
|
|
/* Search for free inbound translation window */
|
|
for (i = 0; i < TSI721_IBWIN_NUM; i++) {
|
|
regval = ioread32(priv->regs + TSI721_IBWIN_LB(i));
|
|
if (!(regval & TSI721_IBWIN_LB_WEN))
|
|
break;
|
|
}
|
|
|
|
if (i >= TSI721_IBWIN_NUM) {
|
|
dev_err(&priv->pdev->dev,
|
|
"Unable to find free inbound window\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
iowrite32(TSI721_IBWIN_SIZE(size) << 8,
|
|
priv->regs + TSI721_IBWIN_SZ(i));
|
|
|
|
iowrite32(((u64)lstart >> 32), priv->regs + TSI721_IBWIN_TUA(i));
|
|
iowrite32(((u64)lstart & TSI721_IBWIN_TLA_ADD),
|
|
priv->regs + TSI721_IBWIN_TLA(i));
|
|
|
|
iowrite32(rstart >> 32, priv->regs + TSI721_IBWIN_UB(i));
|
|
iowrite32((rstart & TSI721_IBWIN_LB_BA) | TSI721_IBWIN_LB_WEN,
|
|
priv->regs + TSI721_IBWIN_LB(i));
|
|
dev_dbg(&priv->pdev->dev,
|
|
"Configured IBWIN%d mapping (RIO_0x%llx -> PCIe_0x%llx)\n",
|
|
i, rstart, (unsigned long long)lstart);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* fsl_rio_unmap_inb_mem -- Unmapping inbound memory region.
|
|
* @mport: RapidIO master port
|
|
* @lstart: Local memory space start address.
|
|
*/
|
|
static void tsi721_rio_unmap_inb_mem(struct rio_mport *mport,
|
|
dma_addr_t lstart)
|
|
{
|
|
struct tsi721_device *priv = mport->priv;
|
|
int i;
|
|
u64 addr;
|
|
u32 regval;
|
|
|
|
/* Search for matching active inbound translation window */
|
|
for (i = 0; i < TSI721_IBWIN_NUM; i++) {
|
|
regval = ioread32(priv->regs + TSI721_IBWIN_LB(i));
|
|
if (regval & TSI721_IBWIN_LB_WEN) {
|
|
regval = ioread32(priv->regs + TSI721_IBWIN_TUA(i));
|
|
addr = (u64)regval << 32;
|
|
regval = ioread32(priv->regs + TSI721_IBWIN_TLA(i));
|
|
addr |= regval & TSI721_IBWIN_TLA_ADD;
|
|
|
|
if (addr == (u64)lstart) {
|
|
iowrite32(0, priv->regs + TSI721_IBWIN_LB(i));
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* tsi721_init_sr2pc_mapping - initializes inbound (SRIO->PCIe)
|
|
* translation regions.
|
|
* @priv: pointer to tsi721 private data
|
|
*
|
|
* Disables inbound windows.
|
|
*/
|
|
static void tsi721_init_sr2pc_mapping(struct tsi721_device *priv)
|
|
{
|
|
int i;
|
|
|
|
/* Disable all SR2PC inbound windows */
|
|
for (i = 0; i < TSI721_IBWIN_NUM; i++)
|
|
iowrite32(0, priv->regs + TSI721_IBWIN_LB(i));
|
|
}
|
|
|
|
/**
|
|
* tsi721_port_write_init - Inbound port write interface init
|
|
* @priv: pointer to tsi721 private data
|
|
*
|
|
* Initializes inbound port write handler.
|
|
* Returns %0 on success or %-ENOMEM on failure.
|
|
*/
|
|
static int tsi721_port_write_init(struct tsi721_device *priv)
|
|
{
|
|
priv->pw_discard_count = 0;
|
|
INIT_WORK(&priv->pw_work, tsi721_pw_dpc);
|
|
spin_lock_init(&priv->pw_fifo_lock);
|
|
if (kfifo_alloc(&priv->pw_fifo,
|
|
TSI721_RIO_PW_MSG_SIZE * 32, GFP_KERNEL)) {
|
|
dev_err(&priv->pdev->dev, "PW FIFO allocation failed\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Use reliable port-write capture mode */
|
|
iowrite32(TSI721_RIO_PW_CTL_PWC_REL, priv->regs + TSI721_RIO_PW_CTL);
|
|
return 0;
|
|
}
|
|
|
|
static int tsi721_doorbell_init(struct tsi721_device *priv)
|
|
{
|
|
/* Outbound Doorbells do not require any setup.
|
|
* Tsi721 uses dedicated PCI BAR1 to generate doorbells.
|
|
* That BAR1 was mapped during the probe routine.
|
|
*/
|
|
|
|
/* Initialize Inbound Doorbell processing DPC and queue */
|
|
priv->db_discard_count = 0;
|
|
INIT_WORK(&priv->idb_work, tsi721_db_dpc);
|
|
|
|
/* Allocate buffer for inbound doorbells queue */
|
|
priv->idb_base = dma_zalloc_coherent(&priv->pdev->dev,
|
|
IDB_QSIZE * TSI721_IDB_ENTRY_SIZE,
|
|
&priv->idb_dma, GFP_KERNEL);
|
|
if (!priv->idb_base)
|
|
return -ENOMEM;
|
|
|
|
dev_dbg(&priv->pdev->dev, "Allocated IDB buffer @ %p (phys = %llx)\n",
|
|
priv->idb_base, (unsigned long long)priv->idb_dma);
|
|
|
|
iowrite32(TSI721_IDQ_SIZE_VAL(IDB_QSIZE),
|
|
priv->regs + TSI721_IDQ_SIZE(IDB_QUEUE));
|
|
iowrite32(((u64)priv->idb_dma >> 32),
|
|
priv->regs + TSI721_IDQ_BASEU(IDB_QUEUE));
|
|
iowrite32(((u64)priv->idb_dma & TSI721_IDQ_BASEL_ADDR),
|
|
priv->regs + TSI721_IDQ_BASEL(IDB_QUEUE));
|
|
/* Enable accepting all inbound doorbells */
|
|
iowrite32(0, priv->regs + TSI721_IDQ_MASK(IDB_QUEUE));
|
|
|
|
iowrite32(TSI721_IDQ_INIT, priv->regs + TSI721_IDQ_CTL(IDB_QUEUE));
|
|
|
|
iowrite32(0, priv->regs + TSI721_IDQ_RP(IDB_QUEUE));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void tsi721_doorbell_free(struct tsi721_device *priv)
|
|
{
|
|
if (priv->idb_base == NULL)
|
|
return;
|
|
|
|
/* Free buffer allocated for inbound doorbell queue */
|
|
dma_free_coherent(&priv->pdev->dev, IDB_QSIZE * TSI721_IDB_ENTRY_SIZE,
|
|
priv->idb_base, priv->idb_dma);
|
|
priv->idb_base = NULL;
|
|
}
|
|
|
|
/**
|
|
* tsi721_bdma_maint_init - Initialize maintenance request BDMA channel.
|
|
* @priv: pointer to tsi721 private data
|
|
*
|
|
* Initialize BDMA channel allocated for RapidIO maintenance read/write
|
|
* request generation
|
|
* Returns %0 on success or %-ENOMEM on failure.
|
|
*/
|
|
static int tsi721_bdma_maint_init(struct tsi721_device *priv)
|
|
{
|
|
struct tsi721_dma_desc *bd_ptr;
|
|
u64 *sts_ptr;
|
|
dma_addr_t bd_phys, sts_phys;
|
|
int sts_size;
|
|
int bd_num = 2;
|
|
void __iomem *regs;
|
|
|
|
dev_dbg(&priv->pdev->dev,
|
|
"Init Block DMA Engine for Maintenance requests, CH%d\n",
|
|
TSI721_DMACH_MAINT);
|
|
|
|
/*
|
|
* Initialize DMA channel for maintenance requests
|
|
*/
|
|
|
|
priv->mdma.ch_id = TSI721_DMACH_MAINT;
|
|
regs = priv->regs + TSI721_DMAC_BASE(TSI721_DMACH_MAINT);
|
|
|
|
/* Allocate space for DMA descriptors */
|
|
bd_ptr = dma_zalloc_coherent(&priv->pdev->dev,
|
|
bd_num * sizeof(struct tsi721_dma_desc),
|
|
&bd_phys, GFP_KERNEL);
|
|
if (!bd_ptr)
|
|
return -ENOMEM;
|
|
|
|
priv->mdma.bd_num = bd_num;
|
|
priv->mdma.bd_phys = bd_phys;
|
|
priv->mdma.bd_base = bd_ptr;
|
|
|
|
dev_dbg(&priv->pdev->dev, "DMA descriptors @ %p (phys = %llx)\n",
|
|
bd_ptr, (unsigned long long)bd_phys);
|
|
|
|
/* Allocate space for descriptor status FIFO */
|
|
sts_size = (bd_num >= TSI721_DMA_MINSTSSZ) ?
|
|
bd_num : TSI721_DMA_MINSTSSZ;
|
|
sts_size = roundup_pow_of_two(sts_size);
|
|
sts_ptr = dma_zalloc_coherent(&priv->pdev->dev,
|
|
sts_size * sizeof(struct tsi721_dma_sts),
|
|
&sts_phys, GFP_KERNEL);
|
|
if (!sts_ptr) {
|
|
/* Free space allocated for DMA descriptors */
|
|
dma_free_coherent(&priv->pdev->dev,
|
|
bd_num * sizeof(struct tsi721_dma_desc),
|
|
bd_ptr, bd_phys);
|
|
priv->mdma.bd_base = NULL;
|
|
return -ENOMEM;
|
|
}
|
|
|
|
priv->mdma.sts_phys = sts_phys;
|
|
priv->mdma.sts_base = sts_ptr;
|
|
priv->mdma.sts_size = sts_size;
|
|
|
|
dev_dbg(&priv->pdev->dev,
|
|
"desc status FIFO @ %p (phys = %llx) size=0x%x\n",
|
|
sts_ptr, (unsigned long long)sts_phys, sts_size);
|
|
|
|
/* Initialize DMA descriptors ring */
|
|
bd_ptr[bd_num - 1].type_id = cpu_to_le32(DTYPE3 << 29);
|
|
bd_ptr[bd_num - 1].next_lo = cpu_to_le32((u64)bd_phys &
|
|
TSI721_DMAC_DPTRL_MASK);
|
|
bd_ptr[bd_num - 1].next_hi = cpu_to_le32((u64)bd_phys >> 32);
|
|
|
|
/* Setup DMA descriptor pointers */
|
|
iowrite32(((u64)bd_phys >> 32), regs + TSI721_DMAC_DPTRH);
|
|
iowrite32(((u64)bd_phys & TSI721_DMAC_DPTRL_MASK),
|
|
regs + TSI721_DMAC_DPTRL);
|
|
|
|
/* Setup descriptor status FIFO */
|
|
iowrite32(((u64)sts_phys >> 32), regs + TSI721_DMAC_DSBH);
|
|
iowrite32(((u64)sts_phys & TSI721_DMAC_DSBL_MASK),
|
|
regs + TSI721_DMAC_DSBL);
|
|
iowrite32(TSI721_DMAC_DSSZ_SIZE(sts_size),
|
|
regs + TSI721_DMAC_DSSZ);
|
|
|
|
/* Clear interrupt bits */
|
|
iowrite32(TSI721_DMAC_INT_ALL, regs + TSI721_DMAC_INT);
|
|
|
|
ioread32(regs + TSI721_DMAC_INT);
|
|
|
|
/* Toggle DMA channel initialization */
|
|
iowrite32(TSI721_DMAC_CTL_INIT, regs + TSI721_DMAC_CTL);
|
|
ioread32(regs + TSI721_DMAC_CTL);
|
|
udelay(10);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tsi721_bdma_maint_free(struct tsi721_device *priv)
|
|
{
|
|
u32 ch_stat;
|
|
struct tsi721_bdma_maint *mdma = &priv->mdma;
|
|
void __iomem *regs = priv->regs + TSI721_DMAC_BASE(mdma->ch_id);
|
|
|
|
if (mdma->bd_base == NULL)
|
|
return 0;
|
|
|
|
/* Check if DMA channel still running */
|
|
ch_stat = ioread32(regs + TSI721_DMAC_STS);
|
|
if (ch_stat & TSI721_DMAC_STS_RUN)
|
|
return -EFAULT;
|
|
|
|
/* Put DMA channel into init state */
|
|
iowrite32(TSI721_DMAC_CTL_INIT, regs + TSI721_DMAC_CTL);
|
|
|
|
/* Free space allocated for DMA descriptors */
|
|
dma_free_coherent(&priv->pdev->dev,
|
|
mdma->bd_num * sizeof(struct tsi721_dma_desc),
|
|
mdma->bd_base, mdma->bd_phys);
|
|
mdma->bd_base = NULL;
|
|
|
|
/* Free space allocated for status FIFO */
|
|
dma_free_coherent(&priv->pdev->dev,
|
|
mdma->sts_size * sizeof(struct tsi721_dma_sts),
|
|
mdma->sts_base, mdma->sts_phys);
|
|
mdma->sts_base = NULL;
|
|
return 0;
|
|
}
|
|
|
|
/* Enable Inbound Messaging Interrupts */
|
|
static void
|
|
tsi721_imsg_interrupt_enable(struct tsi721_device *priv, int ch,
|
|
u32 inte_mask)
|
|
{
|
|
u32 rval;
|
|
|
|
if (!inte_mask)
|
|
return;
|
|
|
|
/* Clear pending Inbound Messaging interrupts */
|
|
iowrite32(inte_mask, priv->regs + TSI721_IBDMAC_INT(ch));
|
|
|
|
/* Enable Inbound Messaging interrupts */
|
|
rval = ioread32(priv->regs + TSI721_IBDMAC_INTE(ch));
|
|
iowrite32(rval | inte_mask, priv->regs + TSI721_IBDMAC_INTE(ch));
|
|
|
|
if (priv->flags & TSI721_USING_MSIX)
|
|
return; /* Finished if we are in MSI-X mode */
|
|
|
|
/*
|
|
* For MSI and INTA interrupt signalling we need to enable next levels
|
|
*/
|
|
|
|
/* Enable Device Channel Interrupt */
|
|
rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
|
|
iowrite32(rval | TSI721_INT_IMSG_CHAN(ch),
|
|
priv->regs + TSI721_DEV_CHAN_INTE);
|
|
}
|
|
|
|
/* Disable Inbound Messaging Interrupts */
|
|
static void
|
|
tsi721_imsg_interrupt_disable(struct tsi721_device *priv, int ch,
|
|
u32 inte_mask)
|
|
{
|
|
u32 rval;
|
|
|
|
if (!inte_mask)
|
|
return;
|
|
|
|
/* Clear pending Inbound Messaging interrupts */
|
|
iowrite32(inte_mask, priv->regs + TSI721_IBDMAC_INT(ch));
|
|
|
|
/* Disable Inbound Messaging interrupts */
|
|
rval = ioread32(priv->regs + TSI721_IBDMAC_INTE(ch));
|
|
rval &= ~inte_mask;
|
|
iowrite32(rval, priv->regs + TSI721_IBDMAC_INTE(ch));
|
|
|
|
if (priv->flags & TSI721_USING_MSIX)
|
|
return; /* Finished if we are in MSI-X mode */
|
|
|
|
/*
|
|
* For MSI and INTA interrupt signalling we need to disable next levels
|
|
*/
|
|
|
|
/* Disable Device Channel Interrupt */
|
|
rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
|
|
rval &= ~TSI721_INT_IMSG_CHAN(ch);
|
|
iowrite32(rval, priv->regs + TSI721_DEV_CHAN_INTE);
|
|
}
|
|
|
|
/* Enable Outbound Messaging interrupts */
|
|
static void
|
|
tsi721_omsg_interrupt_enable(struct tsi721_device *priv, int ch,
|
|
u32 inte_mask)
|
|
{
|
|
u32 rval;
|
|
|
|
if (!inte_mask)
|
|
return;
|
|
|
|
/* Clear pending Outbound Messaging interrupts */
|
|
iowrite32(inte_mask, priv->regs + TSI721_OBDMAC_INT(ch));
|
|
|
|
/* Enable Outbound Messaging channel interrupts */
|
|
rval = ioread32(priv->regs + TSI721_OBDMAC_INTE(ch));
|
|
iowrite32(rval | inte_mask, priv->regs + TSI721_OBDMAC_INTE(ch));
|
|
|
|
if (priv->flags & TSI721_USING_MSIX)
|
|
return; /* Finished if we are in MSI-X mode */
|
|
|
|
/*
|
|
* For MSI and INTA interrupt signalling we need to enable next levels
|
|
*/
|
|
|
|
/* Enable Device Channel Interrupt */
|
|
rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
|
|
iowrite32(rval | TSI721_INT_OMSG_CHAN(ch),
|
|
priv->regs + TSI721_DEV_CHAN_INTE);
|
|
}
|
|
|
|
/* Disable Outbound Messaging interrupts */
|
|
static void
|
|
tsi721_omsg_interrupt_disable(struct tsi721_device *priv, int ch,
|
|
u32 inte_mask)
|
|
{
|
|
u32 rval;
|
|
|
|
if (!inte_mask)
|
|
return;
|
|
|
|
/* Clear pending Outbound Messaging interrupts */
|
|
iowrite32(inte_mask, priv->regs + TSI721_OBDMAC_INT(ch));
|
|
|
|
/* Disable Outbound Messaging interrupts */
|
|
rval = ioread32(priv->regs + TSI721_OBDMAC_INTE(ch));
|
|
rval &= ~inte_mask;
|
|
iowrite32(rval, priv->regs + TSI721_OBDMAC_INTE(ch));
|
|
|
|
if (priv->flags & TSI721_USING_MSIX)
|
|
return; /* Finished if we are in MSI-X mode */
|
|
|
|
/*
|
|
* For MSI and INTA interrupt signalling we need to disable next levels
|
|
*/
|
|
|
|
/* Disable Device Channel Interrupt */
|
|
rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
|
|
rval &= ~TSI721_INT_OMSG_CHAN(ch);
|
|
iowrite32(rval, priv->regs + TSI721_DEV_CHAN_INTE);
|
|
}
|
|
|
|
/**
|
|
* tsi721_add_outb_message - Add message to the Tsi721 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
|
|
*/
|
|
static int
|
|
tsi721_add_outb_message(struct rio_mport *mport, struct rio_dev *rdev, int mbox,
|
|
void *buffer, size_t len)
|
|
{
|
|
struct tsi721_device *priv = mport->priv;
|
|
struct tsi721_omsg_desc *desc;
|
|
u32 tx_slot;
|
|
|
|
if (!priv->omsg_init[mbox] ||
|
|
len > TSI721_MSG_MAX_SIZE || len < 8)
|
|
return -EINVAL;
|
|
|
|
tx_slot = priv->omsg_ring[mbox].tx_slot;
|
|
|
|
/* Copy copy message into transfer buffer */
|
|
memcpy(priv->omsg_ring[mbox].omq_base[tx_slot], buffer, len);
|
|
|
|
if (len & 0x7)
|
|
len += 8;
|
|
|
|
/* Build descriptor associated with buffer */
|
|
desc = priv->omsg_ring[mbox].omd_base;
|
|
desc[tx_slot].type_id = cpu_to_le32((DTYPE4 << 29) | rdev->destid);
|
|
if (tx_slot % 4 == 0)
|
|
desc[tx_slot].type_id |= cpu_to_le32(TSI721_OMD_IOF);
|
|
|
|
desc[tx_slot].msg_info =
|
|
cpu_to_le32((mport->sys_size << 26) | (mbox << 22) |
|
|
(0xe << 12) | (len & 0xff8));
|
|
desc[tx_slot].bufptr_lo =
|
|
cpu_to_le32((u64)priv->omsg_ring[mbox].omq_phys[tx_slot] &
|
|
0xffffffff);
|
|
desc[tx_slot].bufptr_hi =
|
|
cpu_to_le32((u64)priv->omsg_ring[mbox].omq_phys[tx_slot] >> 32);
|
|
|
|
priv->omsg_ring[mbox].wr_count++;
|
|
|
|
/* Go to next descriptor */
|
|
if (++priv->omsg_ring[mbox].tx_slot == priv->omsg_ring[mbox].size) {
|
|
priv->omsg_ring[mbox].tx_slot = 0;
|
|
/* Move through the ring link descriptor at the end */
|
|
priv->omsg_ring[mbox].wr_count++;
|
|
}
|
|
|
|
mb();
|
|
|
|
/* Set new write count value */
|
|
iowrite32(priv->omsg_ring[mbox].wr_count,
|
|
priv->regs + TSI721_OBDMAC_DWRCNT(mbox));
|
|
ioread32(priv->regs + TSI721_OBDMAC_DWRCNT(mbox));
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* tsi721_omsg_handler - Outbound Message Interrupt Handler
|
|
* @priv: pointer to tsi721 private data
|
|
* @ch: number of OB MSG channel to service
|
|
*
|
|
* Services channel interrupts from outbound messaging engine.
|
|
*/
|
|
static void tsi721_omsg_handler(struct tsi721_device *priv, int ch)
|
|
{
|
|
u32 omsg_int;
|
|
|
|
spin_lock(&priv->omsg_ring[ch].lock);
|
|
|
|
omsg_int = ioread32(priv->regs + TSI721_OBDMAC_INT(ch));
|
|
|
|
if (omsg_int & TSI721_OBDMAC_INT_ST_FULL)
|
|
dev_info(&priv->pdev->dev,
|
|
"OB MBOX%d: Status FIFO is full\n", ch);
|
|
|
|
if (omsg_int & (TSI721_OBDMAC_INT_DONE | TSI721_OBDMAC_INT_IOF_DONE)) {
|
|
u32 srd_ptr;
|
|
u64 *sts_ptr, last_ptr = 0, prev_ptr = 0;
|
|
int i, j;
|
|
u32 tx_slot;
|
|
|
|
/*
|
|
* Find last successfully processed descriptor
|
|
*/
|
|
|
|
/* Check and clear descriptor status FIFO entries */
|
|
srd_ptr = priv->omsg_ring[ch].sts_rdptr;
|
|
sts_ptr = priv->omsg_ring[ch].sts_base;
|
|
j = srd_ptr * 8;
|
|
while (sts_ptr[j]) {
|
|
for (i = 0; i < 8 && sts_ptr[j]; i++, j++) {
|
|
prev_ptr = last_ptr;
|
|
last_ptr = le64_to_cpu(sts_ptr[j]);
|
|
sts_ptr[j] = 0;
|
|
}
|
|
|
|
++srd_ptr;
|
|
srd_ptr %= priv->omsg_ring[ch].sts_size;
|
|
j = srd_ptr * 8;
|
|
}
|
|
|
|
if (last_ptr == 0)
|
|
goto no_sts_update;
|
|
|
|
priv->omsg_ring[ch].sts_rdptr = srd_ptr;
|
|
iowrite32(srd_ptr, priv->regs + TSI721_OBDMAC_DSRP(ch));
|
|
|
|
if (!priv->mport->outb_msg[ch].mcback)
|
|
goto no_sts_update;
|
|
|
|
/* Inform upper layer about transfer completion */
|
|
|
|
tx_slot = (last_ptr - (u64)priv->omsg_ring[ch].omd_phys)/
|
|
sizeof(struct tsi721_omsg_desc);
|
|
|
|
/*
|
|
* Check if this is a Link Descriptor (LD).
|
|
* If yes, ignore LD and use descriptor processed
|
|
* before LD.
|
|
*/
|
|
if (tx_slot == priv->omsg_ring[ch].size) {
|
|
if (prev_ptr)
|
|
tx_slot = (prev_ptr -
|
|
(u64)priv->omsg_ring[ch].omd_phys)/
|
|
sizeof(struct tsi721_omsg_desc);
|
|
else
|
|
goto no_sts_update;
|
|
}
|
|
|
|
/* Move slot index to the next message to be sent */
|
|
++tx_slot;
|
|
if (tx_slot == priv->omsg_ring[ch].size)
|
|
tx_slot = 0;
|
|
BUG_ON(tx_slot >= priv->omsg_ring[ch].size);
|
|
priv->mport->outb_msg[ch].mcback(priv->mport,
|
|
priv->omsg_ring[ch].dev_id, ch,
|
|
tx_slot);
|
|
}
|
|
|
|
no_sts_update:
|
|
|
|
if (omsg_int & TSI721_OBDMAC_INT_ERROR) {
|
|
/*
|
|
* Outbound message operation aborted due to error,
|
|
* reinitialize OB MSG channel
|
|
*/
|
|
|
|
dev_dbg(&priv->pdev->dev, "OB MSG ABORT ch_stat=%x\n",
|
|
ioread32(priv->regs + TSI721_OBDMAC_STS(ch)));
|
|
|
|
iowrite32(TSI721_OBDMAC_INT_ERROR,
|
|
priv->regs + TSI721_OBDMAC_INT(ch));
|
|
iowrite32(TSI721_OBDMAC_CTL_INIT,
|
|
priv->regs + TSI721_OBDMAC_CTL(ch));
|
|
ioread32(priv->regs + TSI721_OBDMAC_CTL(ch));
|
|
|
|
/* Inform upper level to clear all pending tx slots */
|
|
if (priv->mport->outb_msg[ch].mcback)
|
|
priv->mport->outb_msg[ch].mcback(priv->mport,
|
|
priv->omsg_ring[ch].dev_id, ch,
|
|
priv->omsg_ring[ch].tx_slot);
|
|
/* Synch tx_slot tracking */
|
|
iowrite32(priv->omsg_ring[ch].tx_slot,
|
|
priv->regs + TSI721_OBDMAC_DRDCNT(ch));
|
|
ioread32(priv->regs + TSI721_OBDMAC_DRDCNT(ch));
|
|
priv->omsg_ring[ch].wr_count = priv->omsg_ring[ch].tx_slot;
|
|
priv->omsg_ring[ch].sts_rdptr = 0;
|
|
}
|
|
|
|
/* Clear channel interrupts */
|
|
iowrite32(omsg_int, priv->regs + TSI721_OBDMAC_INT(ch));
|
|
|
|
if (!(priv->flags & TSI721_USING_MSIX)) {
|
|
u32 ch_inte;
|
|
|
|
/* Re-enable channel interrupts */
|
|
ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
|
|
ch_inte |= TSI721_INT_OMSG_CHAN(ch);
|
|
iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE);
|
|
}
|
|
|
|
spin_unlock(&priv->omsg_ring[ch].lock);
|
|
}
|
|
|
|
/**
|
|
* tsi721_open_outb_mbox - Initialize Tsi721 outbound mailbox
|
|
* @mport: Master port implementing Outbound Messaging Engine
|
|
* @dev_id: Device specific pointer to pass on event
|
|
* @mbox: Mailbox to open
|
|
* @entries: Number of entries in the outbound mailbox ring
|
|
*/
|
|
static int tsi721_open_outb_mbox(struct rio_mport *mport, void *dev_id,
|
|
int mbox, int entries)
|
|
{
|
|
struct tsi721_device *priv = mport->priv;
|
|
struct tsi721_omsg_desc *bd_ptr;
|
|
int i, rc = 0;
|
|
|
|
if ((entries < TSI721_OMSGD_MIN_RING_SIZE) ||
|
|
(entries > (TSI721_OMSGD_RING_SIZE)) ||
|
|
(!is_power_of_2(entries)) || mbox >= RIO_MAX_MBOX) {
|
|
rc = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
priv->omsg_ring[mbox].dev_id = dev_id;
|
|
priv->omsg_ring[mbox].size = entries;
|
|
priv->omsg_ring[mbox].sts_rdptr = 0;
|
|
spin_lock_init(&priv->omsg_ring[mbox].lock);
|
|
|
|
/* Outbound Msg Buffer allocation based on
|
|
the number of maximum descriptor entries */
|
|
for (i = 0; i < entries; i++) {
|
|
priv->omsg_ring[mbox].omq_base[i] =
|
|
dma_alloc_coherent(
|
|
&priv->pdev->dev, TSI721_MSG_BUFFER_SIZE,
|
|
&priv->omsg_ring[mbox].omq_phys[i],
|
|
GFP_KERNEL);
|
|
if (priv->omsg_ring[mbox].omq_base[i] == NULL) {
|
|
dev_dbg(&priv->pdev->dev,
|
|
"Unable to allocate OB MSG data buffer for"
|
|
" MBOX%d\n", mbox);
|
|
rc = -ENOMEM;
|
|
goto out_buf;
|
|
}
|
|
}
|
|
|
|
/* Outbound message descriptor allocation */
|
|
priv->omsg_ring[mbox].omd_base = dma_alloc_coherent(
|
|
&priv->pdev->dev,
|
|
(entries + 1) * sizeof(struct tsi721_omsg_desc),
|
|
&priv->omsg_ring[mbox].omd_phys, GFP_KERNEL);
|
|
if (priv->omsg_ring[mbox].omd_base == NULL) {
|
|
dev_dbg(&priv->pdev->dev,
|
|
"Unable to allocate OB MSG descriptor memory "
|
|
"for MBOX%d\n", mbox);
|
|
rc = -ENOMEM;
|
|
goto out_buf;
|
|
}
|
|
|
|
priv->omsg_ring[mbox].tx_slot = 0;
|
|
|
|
/* Outbound message descriptor status FIFO allocation */
|
|
priv->omsg_ring[mbox].sts_size = roundup_pow_of_two(entries + 1);
|
|
priv->omsg_ring[mbox].sts_base = dma_zalloc_coherent(&priv->pdev->dev,
|
|
priv->omsg_ring[mbox].sts_size *
|
|
sizeof(struct tsi721_dma_sts),
|
|
&priv->omsg_ring[mbox].sts_phys, GFP_KERNEL);
|
|
if (priv->omsg_ring[mbox].sts_base == NULL) {
|
|
dev_dbg(&priv->pdev->dev,
|
|
"Unable to allocate OB MSG descriptor status FIFO "
|
|
"for MBOX%d\n", mbox);
|
|
rc = -ENOMEM;
|
|
goto out_desc;
|
|
}
|
|
|
|
/*
|
|
* Configure Outbound Messaging Engine
|
|
*/
|
|
|
|
/* Setup Outbound Message descriptor pointer */
|
|
iowrite32(((u64)priv->omsg_ring[mbox].omd_phys >> 32),
|
|
priv->regs + TSI721_OBDMAC_DPTRH(mbox));
|
|
iowrite32(((u64)priv->omsg_ring[mbox].omd_phys &
|
|
TSI721_OBDMAC_DPTRL_MASK),
|
|
priv->regs + TSI721_OBDMAC_DPTRL(mbox));
|
|
|
|
/* Setup Outbound Message descriptor status FIFO */
|
|
iowrite32(((u64)priv->omsg_ring[mbox].sts_phys >> 32),
|
|
priv->regs + TSI721_OBDMAC_DSBH(mbox));
|
|
iowrite32(((u64)priv->omsg_ring[mbox].sts_phys &
|
|
TSI721_OBDMAC_DSBL_MASK),
|
|
priv->regs + TSI721_OBDMAC_DSBL(mbox));
|
|
iowrite32(TSI721_DMAC_DSSZ_SIZE(priv->omsg_ring[mbox].sts_size),
|
|
priv->regs + (u32)TSI721_OBDMAC_DSSZ(mbox));
|
|
|
|
/* Enable interrupts */
|
|
|
|
#ifdef CONFIG_PCI_MSI
|
|
if (priv->flags & TSI721_USING_MSIX) {
|
|
/* Request interrupt service if we are in MSI-X mode */
|
|
rc = request_irq(
|
|
priv->msix[TSI721_VECT_OMB0_DONE + mbox].vector,
|
|
tsi721_omsg_msix, 0,
|
|
priv->msix[TSI721_VECT_OMB0_DONE + mbox].irq_name,
|
|
(void *)mport);
|
|
|
|
if (rc) {
|
|
dev_dbg(&priv->pdev->dev,
|
|
"Unable to allocate MSI-X interrupt for "
|
|
"OBOX%d-DONE\n", mbox);
|
|
goto out_stat;
|
|
}
|
|
|
|
rc = request_irq(priv->msix[TSI721_VECT_OMB0_INT + mbox].vector,
|
|
tsi721_omsg_msix, 0,
|
|
priv->msix[TSI721_VECT_OMB0_INT + mbox].irq_name,
|
|
(void *)mport);
|
|
|
|
if (rc) {
|
|
dev_dbg(&priv->pdev->dev,
|
|
"Unable to allocate MSI-X interrupt for "
|
|
"MBOX%d-INT\n", mbox);
|
|
free_irq(
|
|
priv->msix[TSI721_VECT_OMB0_DONE + mbox].vector,
|
|
(void *)mport);
|
|
goto out_stat;
|
|
}
|
|
}
|
|
#endif /* CONFIG_PCI_MSI */
|
|
|
|
tsi721_omsg_interrupt_enable(priv, mbox, TSI721_OBDMAC_INT_ALL);
|
|
|
|
/* Initialize Outbound Message descriptors ring */
|
|
bd_ptr = priv->omsg_ring[mbox].omd_base;
|
|
bd_ptr[entries].type_id = cpu_to_le32(DTYPE5 << 29);
|
|
bd_ptr[entries].msg_info = 0;
|
|
bd_ptr[entries].next_lo =
|
|
cpu_to_le32((u64)priv->omsg_ring[mbox].omd_phys &
|
|
TSI721_OBDMAC_DPTRL_MASK);
|
|
bd_ptr[entries].next_hi =
|
|
cpu_to_le32((u64)priv->omsg_ring[mbox].omd_phys >> 32);
|
|
priv->omsg_ring[mbox].wr_count = 0;
|
|
mb();
|
|
|
|
/* Initialize Outbound Message engine */
|
|
iowrite32(TSI721_OBDMAC_CTL_INIT, priv->regs + TSI721_OBDMAC_CTL(mbox));
|
|
ioread32(priv->regs + TSI721_OBDMAC_DWRCNT(mbox));
|
|
udelay(10);
|
|
|
|
priv->omsg_init[mbox] = 1;
|
|
|
|
return 0;
|
|
|
|
#ifdef CONFIG_PCI_MSI
|
|
out_stat:
|
|
dma_free_coherent(&priv->pdev->dev,
|
|
priv->omsg_ring[mbox].sts_size * sizeof(struct tsi721_dma_sts),
|
|
priv->omsg_ring[mbox].sts_base,
|
|
priv->omsg_ring[mbox].sts_phys);
|
|
|
|
priv->omsg_ring[mbox].sts_base = NULL;
|
|
#endif /* CONFIG_PCI_MSI */
|
|
|
|
out_desc:
|
|
dma_free_coherent(&priv->pdev->dev,
|
|
(entries + 1) * sizeof(struct tsi721_omsg_desc),
|
|
priv->omsg_ring[mbox].omd_base,
|
|
priv->omsg_ring[mbox].omd_phys);
|
|
|
|
priv->omsg_ring[mbox].omd_base = NULL;
|
|
|
|
out_buf:
|
|
for (i = 0; i < priv->omsg_ring[mbox].size; i++) {
|
|
if (priv->omsg_ring[mbox].omq_base[i]) {
|
|
dma_free_coherent(&priv->pdev->dev,
|
|
TSI721_MSG_BUFFER_SIZE,
|
|
priv->omsg_ring[mbox].omq_base[i],
|
|
priv->omsg_ring[mbox].omq_phys[i]);
|
|
|
|
priv->omsg_ring[mbox].omq_base[i] = NULL;
|
|
}
|
|
}
|
|
|
|
out:
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* tsi721_close_outb_mbox - Close Tsi721 outbound mailbox
|
|
* @mport: Master port implementing the outbound message unit
|
|
* @mbox: Mailbox to close
|
|
*/
|
|
static void tsi721_close_outb_mbox(struct rio_mport *mport, int mbox)
|
|
{
|
|
struct tsi721_device *priv = mport->priv;
|
|
u32 i;
|
|
|
|
if (!priv->omsg_init[mbox])
|
|
return;
|
|
priv->omsg_init[mbox] = 0;
|
|
|
|
/* Disable Interrupts */
|
|
|
|
tsi721_omsg_interrupt_disable(priv, mbox, TSI721_OBDMAC_INT_ALL);
|
|
|
|
#ifdef CONFIG_PCI_MSI
|
|
if (priv->flags & TSI721_USING_MSIX) {
|
|
free_irq(priv->msix[TSI721_VECT_OMB0_DONE + mbox].vector,
|
|
(void *)mport);
|
|
free_irq(priv->msix[TSI721_VECT_OMB0_INT + mbox].vector,
|
|
(void *)mport);
|
|
}
|
|
#endif /* CONFIG_PCI_MSI */
|
|
|
|
/* Free OMSG Descriptor Status FIFO */
|
|
dma_free_coherent(&priv->pdev->dev,
|
|
priv->omsg_ring[mbox].sts_size * sizeof(struct tsi721_dma_sts),
|
|
priv->omsg_ring[mbox].sts_base,
|
|
priv->omsg_ring[mbox].sts_phys);
|
|
|
|
priv->omsg_ring[mbox].sts_base = NULL;
|
|
|
|
/* Free OMSG descriptors */
|
|
dma_free_coherent(&priv->pdev->dev,
|
|
(priv->omsg_ring[mbox].size + 1) *
|
|
sizeof(struct tsi721_omsg_desc),
|
|
priv->omsg_ring[mbox].omd_base,
|
|
priv->omsg_ring[mbox].omd_phys);
|
|
|
|
priv->omsg_ring[mbox].omd_base = NULL;
|
|
|
|
/* Free message buffers */
|
|
for (i = 0; i < priv->omsg_ring[mbox].size; i++) {
|
|
if (priv->omsg_ring[mbox].omq_base[i]) {
|
|
dma_free_coherent(&priv->pdev->dev,
|
|
TSI721_MSG_BUFFER_SIZE,
|
|
priv->omsg_ring[mbox].omq_base[i],
|
|
priv->omsg_ring[mbox].omq_phys[i]);
|
|
|
|
priv->omsg_ring[mbox].omq_base[i] = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* tsi721_imsg_handler - Inbound Message Interrupt Handler
|
|
* @priv: pointer to tsi721 private data
|
|
* @ch: inbound message channel number to service
|
|
*
|
|
* Services channel interrupts from inbound messaging engine.
|
|
*/
|
|
static void tsi721_imsg_handler(struct tsi721_device *priv, int ch)
|
|
{
|
|
u32 mbox = ch - 4;
|
|
u32 imsg_int;
|
|
|
|
spin_lock(&priv->imsg_ring[mbox].lock);
|
|
|
|
imsg_int = ioread32(priv->regs + TSI721_IBDMAC_INT(ch));
|
|
|
|
if (imsg_int & TSI721_IBDMAC_INT_SRTO)
|
|
dev_info(&priv->pdev->dev, "IB MBOX%d SRIO timeout\n",
|
|
mbox);
|
|
|
|
if (imsg_int & TSI721_IBDMAC_INT_PC_ERROR)
|
|
dev_info(&priv->pdev->dev, "IB MBOX%d PCIe error\n",
|
|
mbox);
|
|
|
|
if (imsg_int & TSI721_IBDMAC_INT_FQ_LOW)
|
|
dev_info(&priv->pdev->dev,
|
|
"IB MBOX%d IB free queue low\n", mbox);
|
|
|
|
/* Clear IB channel interrupts */
|
|
iowrite32(imsg_int, priv->regs + TSI721_IBDMAC_INT(ch));
|
|
|
|
/* If an IB Msg is received notify the upper layer */
|
|
if (imsg_int & TSI721_IBDMAC_INT_DQ_RCV &&
|
|
priv->mport->inb_msg[mbox].mcback)
|
|
priv->mport->inb_msg[mbox].mcback(priv->mport,
|
|
priv->imsg_ring[mbox].dev_id, mbox, -1);
|
|
|
|
if (!(priv->flags & TSI721_USING_MSIX)) {
|
|
u32 ch_inte;
|
|
|
|
/* Re-enable channel interrupts */
|
|
ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
|
|
ch_inte |= TSI721_INT_IMSG_CHAN(ch);
|
|
iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE);
|
|
}
|
|
|
|
spin_unlock(&priv->imsg_ring[mbox].lock);
|
|
}
|
|
|
|
/**
|
|
* tsi721_open_inb_mbox - Initialize Tsi721 inbound mailbox
|
|
* @mport: Master port implementing the Inbound Messaging Engine
|
|
* @dev_id: Device specific pointer to pass on event
|
|
* @mbox: Mailbox to open
|
|
* @entries: Number of entries in the inbound mailbox ring
|
|
*/
|
|
static int tsi721_open_inb_mbox(struct rio_mport *mport, void *dev_id,
|
|
int mbox, int entries)
|
|
{
|
|
struct tsi721_device *priv = mport->priv;
|
|
int ch = mbox + 4;
|
|
int i;
|
|
u64 *free_ptr;
|
|
int rc = 0;
|
|
|
|
if ((entries < TSI721_IMSGD_MIN_RING_SIZE) ||
|
|
(entries > TSI721_IMSGD_RING_SIZE) ||
|
|
(!is_power_of_2(entries)) || mbox >= RIO_MAX_MBOX) {
|
|
rc = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/* Initialize IB Messaging Ring */
|
|
priv->imsg_ring[mbox].dev_id = dev_id;
|
|
priv->imsg_ring[mbox].size = entries;
|
|
priv->imsg_ring[mbox].rx_slot = 0;
|
|
priv->imsg_ring[mbox].desc_rdptr = 0;
|
|
priv->imsg_ring[mbox].fq_wrptr = 0;
|
|
for (i = 0; i < priv->imsg_ring[mbox].size; i++)
|
|
priv->imsg_ring[mbox].imq_base[i] = NULL;
|
|
spin_lock_init(&priv->imsg_ring[mbox].lock);
|
|
|
|
/* Allocate buffers for incoming messages */
|
|
priv->imsg_ring[mbox].buf_base =
|
|
dma_alloc_coherent(&priv->pdev->dev,
|
|
entries * TSI721_MSG_BUFFER_SIZE,
|
|
&priv->imsg_ring[mbox].buf_phys,
|
|
GFP_KERNEL);
|
|
|
|
if (priv->imsg_ring[mbox].buf_base == NULL) {
|
|
dev_err(&priv->pdev->dev,
|
|
"Failed to allocate buffers for IB MBOX%d\n", mbox);
|
|
rc = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
/* Allocate memory for circular free list */
|
|
priv->imsg_ring[mbox].imfq_base =
|
|
dma_alloc_coherent(&priv->pdev->dev,
|
|
entries * 8,
|
|
&priv->imsg_ring[mbox].imfq_phys,
|
|
GFP_KERNEL);
|
|
|
|
if (priv->imsg_ring[mbox].imfq_base == NULL) {
|
|
dev_err(&priv->pdev->dev,
|
|
"Failed to allocate free queue for IB MBOX%d\n", mbox);
|
|
rc = -ENOMEM;
|
|
goto out_buf;
|
|
}
|
|
|
|
/* Allocate memory for Inbound message descriptors */
|
|
priv->imsg_ring[mbox].imd_base =
|
|
dma_alloc_coherent(&priv->pdev->dev,
|
|
entries * sizeof(struct tsi721_imsg_desc),
|
|
&priv->imsg_ring[mbox].imd_phys, GFP_KERNEL);
|
|
|
|
if (priv->imsg_ring[mbox].imd_base == NULL) {
|
|
dev_err(&priv->pdev->dev,
|
|
"Failed to allocate descriptor memory for IB MBOX%d\n",
|
|
mbox);
|
|
rc = -ENOMEM;
|
|
goto out_dma;
|
|
}
|
|
|
|
/* Fill free buffer pointer list */
|
|
free_ptr = priv->imsg_ring[mbox].imfq_base;
|
|
for (i = 0; i < entries; i++)
|
|
free_ptr[i] = cpu_to_le64(
|
|
(u64)(priv->imsg_ring[mbox].buf_phys) +
|
|
i * 0x1000);
|
|
|
|
mb();
|
|
|
|
/*
|
|
* For mapping of inbound SRIO Messages into appropriate queues we need
|
|
* to set Inbound Device ID register in the messaging engine. We do it
|
|
* once when first inbound mailbox is requested.
|
|
*/
|
|
if (!(priv->flags & TSI721_IMSGID_SET)) {
|
|
iowrite32((u32)priv->mport->host_deviceid,
|
|
priv->regs + TSI721_IB_DEVID);
|
|
priv->flags |= TSI721_IMSGID_SET;
|
|
}
|
|
|
|
/*
|
|
* Configure Inbound Messaging channel (ch = mbox + 4)
|
|
*/
|
|
|
|
/* Setup Inbound Message free queue */
|
|
iowrite32(((u64)priv->imsg_ring[mbox].imfq_phys >> 32),
|
|
priv->regs + TSI721_IBDMAC_FQBH(ch));
|
|
iowrite32(((u64)priv->imsg_ring[mbox].imfq_phys &
|
|
TSI721_IBDMAC_FQBL_MASK),
|
|
priv->regs+TSI721_IBDMAC_FQBL(ch));
|
|
iowrite32(TSI721_DMAC_DSSZ_SIZE(entries),
|
|
priv->regs + TSI721_IBDMAC_FQSZ(ch));
|
|
|
|
/* Setup Inbound Message descriptor queue */
|
|
iowrite32(((u64)priv->imsg_ring[mbox].imd_phys >> 32),
|
|
priv->regs + TSI721_IBDMAC_DQBH(ch));
|
|
iowrite32(((u32)priv->imsg_ring[mbox].imd_phys &
|
|
(u32)TSI721_IBDMAC_DQBL_MASK),
|
|
priv->regs+TSI721_IBDMAC_DQBL(ch));
|
|
iowrite32(TSI721_DMAC_DSSZ_SIZE(entries),
|
|
priv->regs + TSI721_IBDMAC_DQSZ(ch));
|
|
|
|
/* Enable interrupts */
|
|
|
|
#ifdef CONFIG_PCI_MSI
|
|
if (priv->flags & TSI721_USING_MSIX) {
|
|
/* Request interrupt service if we are in MSI-X mode */
|
|
rc = request_irq(priv->msix[TSI721_VECT_IMB0_RCV + mbox].vector,
|
|
tsi721_imsg_msix, 0,
|
|
priv->msix[TSI721_VECT_IMB0_RCV + mbox].irq_name,
|
|
(void *)mport);
|
|
|
|
if (rc) {
|
|
dev_dbg(&priv->pdev->dev,
|
|
"Unable to allocate MSI-X interrupt for "
|
|
"IBOX%d-DONE\n", mbox);
|
|
goto out_desc;
|
|
}
|
|
|
|
rc = request_irq(priv->msix[TSI721_VECT_IMB0_INT + mbox].vector,
|
|
tsi721_imsg_msix, 0,
|
|
priv->msix[TSI721_VECT_IMB0_INT + mbox].irq_name,
|
|
(void *)mport);
|
|
|
|
if (rc) {
|
|
dev_dbg(&priv->pdev->dev,
|
|
"Unable to allocate MSI-X interrupt for "
|
|
"IBOX%d-INT\n", mbox);
|
|
free_irq(
|
|
priv->msix[TSI721_VECT_IMB0_RCV + mbox].vector,
|
|
(void *)mport);
|
|
goto out_desc;
|
|
}
|
|
}
|
|
#endif /* CONFIG_PCI_MSI */
|
|
|
|
tsi721_imsg_interrupt_enable(priv, ch, TSI721_IBDMAC_INT_ALL);
|
|
|
|
/* Initialize Inbound Message Engine */
|
|
iowrite32(TSI721_IBDMAC_CTL_INIT, priv->regs + TSI721_IBDMAC_CTL(ch));
|
|
ioread32(priv->regs + TSI721_IBDMAC_CTL(ch));
|
|
udelay(10);
|
|
priv->imsg_ring[mbox].fq_wrptr = entries - 1;
|
|
iowrite32(entries - 1, priv->regs + TSI721_IBDMAC_FQWP(ch));
|
|
|
|
priv->imsg_init[mbox] = 1;
|
|
return 0;
|
|
|
|
#ifdef CONFIG_PCI_MSI
|
|
out_desc:
|
|
dma_free_coherent(&priv->pdev->dev,
|
|
priv->imsg_ring[mbox].size * sizeof(struct tsi721_imsg_desc),
|
|
priv->imsg_ring[mbox].imd_base,
|
|
priv->imsg_ring[mbox].imd_phys);
|
|
|
|
priv->imsg_ring[mbox].imd_base = NULL;
|
|
#endif /* CONFIG_PCI_MSI */
|
|
|
|
out_dma:
|
|
dma_free_coherent(&priv->pdev->dev,
|
|
priv->imsg_ring[mbox].size * 8,
|
|
priv->imsg_ring[mbox].imfq_base,
|
|
priv->imsg_ring[mbox].imfq_phys);
|
|
|
|
priv->imsg_ring[mbox].imfq_base = NULL;
|
|
|
|
out_buf:
|
|
dma_free_coherent(&priv->pdev->dev,
|
|
priv->imsg_ring[mbox].size * TSI721_MSG_BUFFER_SIZE,
|
|
priv->imsg_ring[mbox].buf_base,
|
|
priv->imsg_ring[mbox].buf_phys);
|
|
|
|
priv->imsg_ring[mbox].buf_base = NULL;
|
|
|
|
out:
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* tsi721_close_inb_mbox - Shut down Tsi721 inbound mailbox
|
|
* @mport: Master port implementing the Inbound Messaging Engine
|
|
* @mbox: Mailbox to close
|
|
*/
|
|
static void tsi721_close_inb_mbox(struct rio_mport *mport, int mbox)
|
|
{
|
|
struct tsi721_device *priv = mport->priv;
|
|
u32 rx_slot;
|
|
int ch = mbox + 4;
|
|
|
|
if (!priv->imsg_init[mbox]) /* mbox isn't initialized yet */
|
|
return;
|
|
priv->imsg_init[mbox] = 0;
|
|
|
|
/* Disable Inbound Messaging Engine */
|
|
|
|
/* Disable Interrupts */
|
|
tsi721_imsg_interrupt_disable(priv, ch, TSI721_OBDMAC_INT_MASK);
|
|
|
|
#ifdef CONFIG_PCI_MSI
|
|
if (priv->flags & TSI721_USING_MSIX) {
|
|
free_irq(priv->msix[TSI721_VECT_IMB0_RCV + mbox].vector,
|
|
(void *)mport);
|
|
free_irq(priv->msix[TSI721_VECT_IMB0_INT + mbox].vector,
|
|
(void *)mport);
|
|
}
|
|
#endif /* CONFIG_PCI_MSI */
|
|
|
|
/* Clear Inbound Buffer Queue */
|
|
for (rx_slot = 0; rx_slot < priv->imsg_ring[mbox].size; rx_slot++)
|
|
priv->imsg_ring[mbox].imq_base[rx_slot] = NULL;
|
|
|
|
/* Free memory allocated for message buffers */
|
|
dma_free_coherent(&priv->pdev->dev,
|
|
priv->imsg_ring[mbox].size * TSI721_MSG_BUFFER_SIZE,
|
|
priv->imsg_ring[mbox].buf_base,
|
|
priv->imsg_ring[mbox].buf_phys);
|
|
|
|
priv->imsg_ring[mbox].buf_base = NULL;
|
|
|
|
/* Free memory allocated for free pointr list */
|
|
dma_free_coherent(&priv->pdev->dev,
|
|
priv->imsg_ring[mbox].size * 8,
|
|
priv->imsg_ring[mbox].imfq_base,
|
|
priv->imsg_ring[mbox].imfq_phys);
|
|
|
|
priv->imsg_ring[mbox].imfq_base = NULL;
|
|
|
|
/* Free memory allocated for RX descriptors */
|
|
dma_free_coherent(&priv->pdev->dev,
|
|
priv->imsg_ring[mbox].size * sizeof(struct tsi721_imsg_desc),
|
|
priv->imsg_ring[mbox].imd_base,
|
|
priv->imsg_ring[mbox].imd_phys);
|
|
|
|
priv->imsg_ring[mbox].imd_base = NULL;
|
|
}
|
|
|
|
/**
|
|
* tsi721_add_inb_buffer - Add buffer to the Tsi721 inbound message queue
|
|
* @mport: Master port implementing the Inbound Messaging Engine
|
|
* @mbox: Inbound mailbox number
|
|
* @buf: Buffer to add to inbound queue
|
|
*/
|
|
static int tsi721_add_inb_buffer(struct rio_mport *mport, int mbox, void *buf)
|
|
{
|
|
struct tsi721_device *priv = mport->priv;
|
|
u32 rx_slot;
|
|
int rc = 0;
|
|
|
|
rx_slot = priv->imsg_ring[mbox].rx_slot;
|
|
if (priv->imsg_ring[mbox].imq_base[rx_slot]) {
|
|
dev_err(&priv->pdev->dev,
|
|
"Error adding inbound buffer %d, buffer exists\n",
|
|
rx_slot);
|
|
rc = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
priv->imsg_ring[mbox].imq_base[rx_slot] = buf;
|
|
|
|
if (++priv->imsg_ring[mbox].rx_slot == priv->imsg_ring[mbox].size)
|
|
priv->imsg_ring[mbox].rx_slot = 0;
|
|
|
|
out:
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* tsi721_get_inb_message - Fetch inbound message from the Tsi721 MSG Queue
|
|
* @mport: Master port implementing the Inbound Messaging Engine
|
|
* @mbox: Inbound mailbox number
|
|
*
|
|
* Returns pointer to the message on success or NULL on failure.
|
|
*/
|
|
static void *tsi721_get_inb_message(struct rio_mport *mport, int mbox)
|
|
{
|
|
struct tsi721_device *priv = mport->priv;
|
|
struct tsi721_imsg_desc *desc;
|
|
u32 rx_slot;
|
|
void *rx_virt = NULL;
|
|
u64 rx_phys;
|
|
void *buf = NULL;
|
|
u64 *free_ptr;
|
|
int ch = mbox + 4;
|
|
int msg_size;
|
|
|
|
if (!priv->imsg_init[mbox])
|
|
return NULL;
|
|
|
|
desc = priv->imsg_ring[mbox].imd_base;
|
|
desc += priv->imsg_ring[mbox].desc_rdptr;
|
|
|
|
if (!(le32_to_cpu(desc->msg_info) & TSI721_IMD_HO))
|
|
goto out;
|
|
|
|
rx_slot = priv->imsg_ring[mbox].rx_slot;
|
|
while (priv->imsg_ring[mbox].imq_base[rx_slot] == NULL) {
|
|
if (++rx_slot == priv->imsg_ring[mbox].size)
|
|
rx_slot = 0;
|
|
}
|
|
|
|
rx_phys = ((u64)le32_to_cpu(desc->bufptr_hi) << 32) |
|
|
le32_to_cpu(desc->bufptr_lo);
|
|
|
|
rx_virt = priv->imsg_ring[mbox].buf_base +
|
|
(rx_phys - (u64)priv->imsg_ring[mbox].buf_phys);
|
|
|
|
buf = priv->imsg_ring[mbox].imq_base[rx_slot];
|
|
msg_size = le32_to_cpu(desc->msg_info) & TSI721_IMD_BCOUNT;
|
|
if (msg_size == 0)
|
|
msg_size = RIO_MAX_MSG_SIZE;
|
|
|
|
memcpy(buf, rx_virt, msg_size);
|
|
priv->imsg_ring[mbox].imq_base[rx_slot] = NULL;
|
|
|
|
desc->msg_info &= cpu_to_le32(~TSI721_IMD_HO);
|
|
if (++priv->imsg_ring[mbox].desc_rdptr == priv->imsg_ring[mbox].size)
|
|
priv->imsg_ring[mbox].desc_rdptr = 0;
|
|
|
|
iowrite32(priv->imsg_ring[mbox].desc_rdptr,
|
|
priv->regs + TSI721_IBDMAC_DQRP(ch));
|
|
|
|
/* Return free buffer into the pointer list */
|
|
free_ptr = priv->imsg_ring[mbox].imfq_base;
|
|
free_ptr[priv->imsg_ring[mbox].fq_wrptr] = cpu_to_le64(rx_phys);
|
|
|
|
if (++priv->imsg_ring[mbox].fq_wrptr == priv->imsg_ring[mbox].size)
|
|
priv->imsg_ring[mbox].fq_wrptr = 0;
|
|
|
|
iowrite32(priv->imsg_ring[mbox].fq_wrptr,
|
|
priv->regs + TSI721_IBDMAC_FQWP(ch));
|
|
out:
|
|
return buf;
|
|
}
|
|
|
|
/**
|
|
* tsi721_messages_init - Initialization of Messaging Engine
|
|
* @priv: pointer to tsi721 private data
|
|
*
|
|
* Configures Tsi721 messaging engine.
|
|
*/
|
|
static int tsi721_messages_init(struct tsi721_device *priv)
|
|
{
|
|
int ch;
|
|
|
|
iowrite32(0, priv->regs + TSI721_SMSG_ECC_LOG);
|
|
iowrite32(0, priv->regs + TSI721_RETRY_GEN_CNT);
|
|
iowrite32(0, priv->regs + TSI721_RETRY_RX_CNT);
|
|
|
|
/* Set SRIO Message Request/Response Timeout */
|
|
iowrite32(TSI721_RQRPTO_VAL, priv->regs + TSI721_RQRPTO);
|
|
|
|
/* Initialize Inbound Messaging Engine Registers */
|
|
for (ch = 0; ch < TSI721_IMSG_CHNUM; ch++) {
|
|
/* Clear interrupt bits */
|
|
iowrite32(TSI721_IBDMAC_INT_MASK,
|
|
priv->regs + TSI721_IBDMAC_INT(ch));
|
|
/* Clear Status */
|
|
iowrite32(0, priv->regs + TSI721_IBDMAC_STS(ch));
|
|
|
|
iowrite32(TSI721_SMSG_ECC_COR_LOG_MASK,
|
|
priv->regs + TSI721_SMSG_ECC_COR_LOG(ch));
|
|
iowrite32(TSI721_SMSG_ECC_NCOR_MASK,
|
|
priv->regs + TSI721_SMSG_ECC_NCOR(ch));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* tsi721_disable_ints - disables all device interrupts
|
|
* @priv: pointer to tsi721 private data
|
|
*/
|
|
static void tsi721_disable_ints(struct tsi721_device *priv)
|
|
{
|
|
int ch;
|
|
|
|
/* Disable all device level interrupts */
|
|
iowrite32(0, priv->regs + TSI721_DEV_INTE);
|
|
|
|
/* Disable all Device Channel interrupts */
|
|
iowrite32(0, priv->regs + TSI721_DEV_CHAN_INTE);
|
|
|
|
/* Disable all Inbound Msg Channel interrupts */
|
|
for (ch = 0; ch < TSI721_IMSG_CHNUM; ch++)
|
|
iowrite32(0, priv->regs + TSI721_IBDMAC_INTE(ch));
|
|
|
|
/* Disable all Outbound Msg Channel interrupts */
|
|
for (ch = 0; ch < TSI721_OMSG_CHNUM; ch++)
|
|
iowrite32(0, priv->regs + TSI721_OBDMAC_INTE(ch));
|
|
|
|
/* Disable all general messaging interrupts */
|
|
iowrite32(0, priv->regs + TSI721_SMSG_INTE);
|
|
|
|
/* Disable all BDMA Channel interrupts */
|
|
for (ch = 0; ch < TSI721_DMA_MAXCH; ch++)
|
|
iowrite32(0,
|
|
priv->regs + TSI721_DMAC_BASE(ch) + TSI721_DMAC_INTE);
|
|
|
|
/* Disable all general BDMA interrupts */
|
|
iowrite32(0, priv->regs + TSI721_BDMA_INTE);
|
|
|
|
/* Disable all SRIO Channel interrupts */
|
|
for (ch = 0; ch < TSI721_SRIO_MAXCH; ch++)
|
|
iowrite32(0, priv->regs + TSI721_SR_CHINTE(ch));
|
|
|
|
/* Disable all general SR2PC interrupts */
|
|
iowrite32(0, priv->regs + TSI721_SR2PC_GEN_INTE);
|
|
|
|
/* Disable all PC2SR interrupts */
|
|
iowrite32(0, priv->regs + TSI721_PC2SR_INTE);
|
|
|
|
/* Disable all I2C interrupts */
|
|
iowrite32(0, priv->regs + TSI721_I2C_INT_ENABLE);
|
|
|
|
/* Disable SRIO MAC interrupts */
|
|
iowrite32(0, priv->regs + TSI721_RIO_EM_INT_ENABLE);
|
|
iowrite32(0, priv->regs + TSI721_RIO_EM_DEV_INT_EN);
|
|
}
|
|
|
|
/**
|
|
* tsi721_setup_mport - Setup Tsi721 as RapidIO subsystem master port
|
|
* @priv: pointer to tsi721 private data
|
|
*
|
|
* Configures Tsi721 as RapidIO master port.
|
|
*/
|
|
static int tsi721_setup_mport(struct tsi721_device *priv)
|
|
{
|
|
struct pci_dev *pdev = priv->pdev;
|
|
int err = 0;
|
|
struct rio_ops *ops;
|
|
|
|
struct rio_mport *mport;
|
|
|
|
ops = kzalloc(sizeof(struct rio_ops), GFP_KERNEL);
|
|
if (!ops) {
|
|
dev_dbg(&pdev->dev, "Unable to allocate memory for rio_ops\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
ops->lcread = tsi721_lcread;
|
|
ops->lcwrite = tsi721_lcwrite;
|
|
ops->cread = tsi721_cread_dma;
|
|
ops->cwrite = tsi721_cwrite_dma;
|
|
ops->dsend = tsi721_dsend;
|
|
ops->open_inb_mbox = tsi721_open_inb_mbox;
|
|
ops->close_inb_mbox = tsi721_close_inb_mbox;
|
|
ops->open_outb_mbox = tsi721_open_outb_mbox;
|
|
ops->close_outb_mbox = tsi721_close_outb_mbox;
|
|
ops->add_outb_message = tsi721_add_outb_message;
|
|
ops->add_inb_buffer = tsi721_add_inb_buffer;
|
|
ops->get_inb_message = tsi721_get_inb_message;
|
|
ops->map_inb = tsi721_rio_map_inb_mem;
|
|
ops->unmap_inb = tsi721_rio_unmap_inb_mem;
|
|
|
|
mport = kzalloc(sizeof(struct rio_mport), GFP_KERNEL);
|
|
if (!mport) {
|
|
kfree(ops);
|
|
dev_dbg(&pdev->dev, "Unable to allocate memory for mport\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
mport->ops = ops;
|
|
mport->index = 0;
|
|
mport->sys_size = 0; /* small system */
|
|
mport->phy_type = RIO_PHY_SERIAL;
|
|
mport->priv = (void *)priv;
|
|
mport->phys_efptr = 0x100;
|
|
mport->dev.parent = &pdev->dev;
|
|
priv->mport = mport;
|
|
|
|
INIT_LIST_HEAD(&mport->dbells);
|
|
|
|
rio_init_dbell_res(&mport->riores[RIO_DOORBELL_RESOURCE], 0, 0xffff);
|
|
rio_init_mbox_res(&mport->riores[RIO_INB_MBOX_RESOURCE], 0, 3);
|
|
rio_init_mbox_res(&mport->riores[RIO_OUTB_MBOX_RESOURCE], 0, 3);
|
|
snprintf(mport->name, RIO_MAX_MPORT_NAME, "%s(%s)",
|
|
dev_driver_string(&pdev->dev), dev_name(&pdev->dev));
|
|
|
|
/* Hook up interrupt handler */
|
|
|
|
#ifdef CONFIG_PCI_MSI
|
|
if (!tsi721_enable_msix(priv))
|
|
priv->flags |= TSI721_USING_MSIX;
|
|
else if (!pci_enable_msi(pdev))
|
|
priv->flags |= TSI721_USING_MSI;
|
|
else
|
|
dev_info(&pdev->dev,
|
|
"MSI/MSI-X is not available. Using legacy INTx.\n");
|
|
#endif /* CONFIG_PCI_MSI */
|
|
|
|
err = tsi721_request_irq(mport);
|
|
|
|
if (!err) {
|
|
tsi721_interrupts_init(priv);
|
|
ops->pwenable = tsi721_pw_enable;
|
|
} else {
|
|
dev_err(&pdev->dev, "Unable to get assigned PCI IRQ "
|
|
"vector %02X err=0x%x\n", pdev->irq, err);
|
|
goto err_exit;
|
|
}
|
|
|
|
#ifdef CONFIG_RAPIDIO_DMA_ENGINE
|
|
tsi721_register_dma(priv);
|
|
#endif
|
|
/* Enable SRIO link */
|
|
iowrite32(ioread32(priv->regs + TSI721_DEVCTL) |
|
|
TSI721_DEVCTL_SRBOOT_CMPL,
|
|
priv->regs + TSI721_DEVCTL);
|
|
|
|
rio_register_mport(mport);
|
|
|
|
if (mport->host_deviceid >= 0)
|
|
iowrite32(RIO_PORT_GEN_HOST | RIO_PORT_GEN_MASTER |
|
|
RIO_PORT_GEN_DISCOVERED,
|
|
priv->regs + (0x100 + RIO_PORT_GEN_CTL_CSR));
|
|
else
|
|
iowrite32(0, priv->regs + (0x100 + RIO_PORT_GEN_CTL_CSR));
|
|
|
|
return 0;
|
|
|
|
err_exit:
|
|
kfree(mport);
|
|
kfree(ops);
|
|
return err;
|
|
}
|
|
|
|
static int tsi721_probe(struct pci_dev *pdev,
|
|
const struct pci_device_id *id)
|
|
{
|
|
struct tsi721_device *priv;
|
|
int err;
|
|
|
|
priv = kzalloc(sizeof(struct tsi721_device), GFP_KERNEL);
|
|
if (priv == NULL) {
|
|
dev_err(&pdev->dev, "Failed to allocate memory for device\n");
|
|
err = -ENOMEM;
|
|
goto err_exit;
|
|
}
|
|
|
|
err = pci_enable_device(pdev);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "Failed to enable PCI device\n");
|
|
goto err_clean;
|
|
}
|
|
|
|
priv->pdev = pdev;
|
|
|
|
#ifdef DEBUG
|
|
{
|
|
int i;
|
|
for (i = 0; i <= PCI_STD_RESOURCE_END; i++) {
|
|
dev_dbg(&pdev->dev, "res[%d] @ 0x%llx (0x%lx, 0x%lx)\n",
|
|
i, (unsigned long long)pci_resource_start(pdev, i),
|
|
(unsigned long)pci_resource_len(pdev, i),
|
|
pci_resource_flags(pdev, i));
|
|
}
|
|
}
|
|
#endif
|
|
/*
|
|
* Verify BAR configuration
|
|
*/
|
|
|
|
/* BAR_0 (registers) must be 512KB+ in 32-bit address space */
|
|
if (!(pci_resource_flags(pdev, BAR_0) & IORESOURCE_MEM) ||
|
|
pci_resource_flags(pdev, BAR_0) & IORESOURCE_MEM_64 ||
|
|
pci_resource_len(pdev, BAR_0) < TSI721_REG_SPACE_SIZE) {
|
|
dev_err(&pdev->dev,
|
|
"Missing or misconfigured CSR BAR0, aborting.\n");
|
|
err = -ENODEV;
|
|
goto err_disable_pdev;
|
|
}
|
|
|
|
/* BAR_1 (outbound doorbells) must be 16MB+ in 32-bit address space */
|
|
if (!(pci_resource_flags(pdev, BAR_1) & IORESOURCE_MEM) ||
|
|
pci_resource_flags(pdev, BAR_1) & IORESOURCE_MEM_64 ||
|
|
pci_resource_len(pdev, BAR_1) < TSI721_DB_WIN_SIZE) {
|
|
dev_err(&pdev->dev,
|
|
"Missing or misconfigured Doorbell BAR1, aborting.\n");
|
|
err = -ENODEV;
|
|
goto err_disable_pdev;
|
|
}
|
|
|
|
/*
|
|
* BAR_2 and BAR_4 (outbound translation) must be in 64-bit PCIe address
|
|
* space.
|
|
* NOTE: BAR_2 and BAR_4 are not used by this version of driver.
|
|
* It may be a good idea to keep them disabled using HW configuration
|
|
* to save PCI memory space.
|
|
*/
|
|
if ((pci_resource_flags(pdev, BAR_2) & IORESOURCE_MEM) &&
|
|
(pci_resource_flags(pdev, BAR_2) & IORESOURCE_MEM_64)) {
|
|
dev_info(&pdev->dev, "Outbound BAR2 is not used but enabled.\n");
|
|
}
|
|
|
|
if ((pci_resource_flags(pdev, BAR_4) & IORESOURCE_MEM) &&
|
|
(pci_resource_flags(pdev, BAR_4) & IORESOURCE_MEM_64)) {
|
|
dev_info(&pdev->dev, "Outbound BAR4 is not used but enabled.\n");
|
|
}
|
|
|
|
err = pci_request_regions(pdev, DRV_NAME);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "Cannot obtain PCI resources, "
|
|
"aborting.\n");
|
|
goto err_disable_pdev;
|
|
}
|
|
|
|
pci_set_master(pdev);
|
|
|
|
priv->regs = pci_ioremap_bar(pdev, BAR_0);
|
|
if (!priv->regs) {
|
|
dev_err(&pdev->dev,
|
|
"Unable to map device registers space, aborting\n");
|
|
err = -ENOMEM;
|
|
goto err_free_res;
|
|
}
|
|
|
|
priv->odb_base = pci_ioremap_bar(pdev, BAR_1);
|
|
if (!priv->odb_base) {
|
|
dev_err(&pdev->dev,
|
|
"Unable to map outbound doorbells space, aborting\n");
|
|
err = -ENOMEM;
|
|
goto err_unmap_bars;
|
|
}
|
|
|
|
/* Configure DMA attributes. */
|
|
if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
|
|
err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
|
|
if (err) {
|
|
dev_info(&pdev->dev, "Unable to set DMA mask\n");
|
|
goto err_unmap_bars;
|
|
}
|
|
|
|
if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)))
|
|
dev_info(&pdev->dev, "Unable to set consistent DMA mask\n");
|
|
} else {
|
|
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
|
|
if (err)
|
|
dev_info(&pdev->dev, "Unable to set consistent DMA mask\n");
|
|
}
|
|
|
|
BUG_ON(!pci_is_pcie(pdev));
|
|
|
|
/* Clear "no snoop" and "relaxed ordering" bits, use default MRRS. */
|
|
pcie_capability_clear_and_set_word(pdev, PCI_EXP_DEVCTL,
|
|
PCI_EXP_DEVCTL_READRQ | PCI_EXP_DEVCTL_RELAX_EN |
|
|
PCI_EXP_DEVCTL_NOSNOOP_EN,
|
|
PCI_EXP_DEVCTL_READRQ_512B);
|
|
|
|
/* Adjust PCIe completion timeout. */
|
|
pcie_capability_clear_and_set_word(pdev, PCI_EXP_DEVCTL2, 0xf, 0x2);
|
|
|
|
/*
|
|
* FIXUP: correct offsets of MSI-X tables in the MSI-X Capability Block
|
|
*/
|
|
pci_write_config_dword(pdev, TSI721_PCIECFG_EPCTL, 0x01);
|
|
pci_write_config_dword(pdev, TSI721_PCIECFG_MSIXTBL,
|
|
TSI721_MSIXTBL_OFFSET);
|
|
pci_write_config_dword(pdev, TSI721_PCIECFG_MSIXPBA,
|
|
TSI721_MSIXPBA_OFFSET);
|
|
pci_write_config_dword(pdev, TSI721_PCIECFG_EPCTL, 0);
|
|
/* End of FIXUP */
|
|
|
|
tsi721_disable_ints(priv);
|
|
|
|
tsi721_init_pc2sr_mapping(priv);
|
|
tsi721_init_sr2pc_mapping(priv);
|
|
|
|
if (tsi721_bdma_maint_init(priv)) {
|
|
dev_err(&pdev->dev, "BDMA initialization failed, aborting\n");
|
|
err = -ENOMEM;
|
|
goto err_unmap_bars;
|
|
}
|
|
|
|
err = tsi721_doorbell_init(priv);
|
|
if (err)
|
|
goto err_free_bdma;
|
|
|
|
tsi721_port_write_init(priv);
|
|
|
|
err = tsi721_messages_init(priv);
|
|
if (err)
|
|
goto err_free_consistent;
|
|
|
|
err = tsi721_setup_mport(priv);
|
|
if (err)
|
|
goto err_free_consistent;
|
|
|
|
return 0;
|
|
|
|
err_free_consistent:
|
|
tsi721_doorbell_free(priv);
|
|
err_free_bdma:
|
|
tsi721_bdma_maint_free(priv);
|
|
err_unmap_bars:
|
|
if (priv->regs)
|
|
iounmap(priv->regs);
|
|
if (priv->odb_base)
|
|
iounmap(priv->odb_base);
|
|
err_free_res:
|
|
pci_release_regions(pdev);
|
|
pci_clear_master(pdev);
|
|
err_disable_pdev:
|
|
pci_disable_device(pdev);
|
|
err_clean:
|
|
kfree(priv);
|
|
err_exit:
|
|
return err;
|
|
}
|
|
|
|
static const struct pci_device_id tsi721_pci_tbl[] = {
|
|
{ PCI_DEVICE(PCI_VENDOR_ID_IDT, PCI_DEVICE_ID_TSI721) },
|
|
{ 0, } /* terminate list */
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pci, tsi721_pci_tbl);
|
|
|
|
static struct pci_driver tsi721_driver = {
|
|
.name = "tsi721",
|
|
.id_table = tsi721_pci_tbl,
|
|
.probe = tsi721_probe,
|
|
};
|
|
|
|
static int __init tsi721_init(void)
|
|
{
|
|
return pci_register_driver(&tsi721_driver);
|
|
}
|
|
|
|
device_initcall(tsi721_init);
|
|
|
|
MODULE_DESCRIPTION("IDT Tsi721 PCIExpress-to-SRIO bridge driver");
|
|
MODULE_AUTHOR("Integrated Device Technology, Inc.");
|
|
MODULE_LICENSE("GPL");
|