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linux-next/drivers/rapidio/devices/tsi721.c
Ioan Nicu 31d1e130f4 rapidio: remove global irq spinlocks from the subsystem 
Locking of config and doorbell operations should be done only if the
underlying hardware requires it.

This patch removes the global spinlocks from the rapidio subsystem and
moves them to the mport drivers (fsl_rio and tsi721), only to the
necessary places.  For example, local config space read and write
operations (lcread/lcwrite) are atomic in all existing drivers, so there
should be no need for locking, while the cread/cwrite operations which
generate maintenance transactions need to be synchronized with a lock.

Later, each driver could chose to use a per-port lock instead of a
global one, or even more granular locking.

Link: http://lkml.kernel.org/r/20170824113023.GD50104@nokia.com
Signed-off-by: Ioan Nicu <ioan.nicu.ext@nokia.com>
Signed-off-by: Frank Kunz <frank.kunz@nokia.com>
Acked-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-10-03 17:54:24 -07:00

3015 lines
82 KiB
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/*
* RapidIO mport driver for Tsi721 PCIExpress-to-SRIO bridge
*
* Copyright 2011 Integrated Device Technology, Inc.
* Alexandre Bounine <alexandre.bounine@idt.com>
* Chul Kim <chul.kim@idt.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <linux/io.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/rio.h>
#include <linux/rio_drv.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/kfifo.h>
#include <linux/delay.h>
#include "tsi721.h"
#ifdef DEBUG
u32 tsi_dbg_level;
module_param_named(dbg_level, tsi_dbg_level, uint, S_IWUSR | S_IRUGO);
MODULE_PARM_DESC(dbg_level, "Debugging output level (default 0 = none)");
#endif
static int pcie_mrrs = -1;
module_param(pcie_mrrs, int, S_IRUGO);
MODULE_PARM_DESC(pcie_mrrs, "PCIe MRRS override value (0...5)");
static u8 mbox_sel = 0x0f;
module_param(mbox_sel, byte, S_IRUGO);
MODULE_PARM_DESC(mbox_sel,
"RIO Messaging MBOX Selection Mask (default: 0x0f = all)");
static DEFINE_SPINLOCK(tsi721_maint_lock);
static void tsi721_omsg_handler(struct tsi721_device *priv, int ch);
static void tsi721_imsg_handler(struct tsi721_device *priv, int ch);
/**
* tsi721_lcread - read from local SREP config space
* @mport: RapidIO master port info
* @index: ID of RapdiIO interface
* @offset: Offset into configuration space
* @len: Length (in bytes) of the maintenance transaction
* @data: Value to be read into
*
* Generates a local SREP space read. Returns %0 on
* success or %-EINVAL on failure.
*/
static int tsi721_lcread(struct rio_mport *mport, int index, u32 offset,
int len, u32 *data)
{
struct tsi721_device *priv = mport->priv;
if (len != sizeof(u32))
return -EINVAL; /* only 32-bit access is supported */
*data = ioread32(priv->regs + offset);
return 0;
}
/**
* tsi721_lcwrite - write into local SREP config space
* @mport: RapidIO master port info
* @index: ID of RapdiIO interface
* @offset: Offset into configuration space
* @len: Length (in bytes) of the maintenance transaction
* @data: Value to be written
*
* Generates a local write into SREP configuration space. Returns %0 on
* success or %-EINVAL on failure.
*/
static int tsi721_lcwrite(struct rio_mport *mport, int index, u32 offset,
int len, u32 data)
{
struct tsi721_device *priv = mport->priv;
if (len != sizeof(u32))
return -EINVAL; /* only 32-bit access is supported */
iowrite32(data, priv->regs + offset);
return 0;
}
/**
* tsi721_maint_dma - Helper function to generate RapidIO maintenance
* transactions using designated Tsi721 DMA channel.
* @priv: pointer to tsi721 private data
* @sys_size: RapdiIO transport system size
* @destid: Destination ID of transaction
* @hopcount: Number of hops to target device
* @offset: Offset into configuration space
* @len: Length (in bytes) of the maintenance transaction
* @data: Location to be read from or write into
* @do_wr: Operation flag (1 == MAINT_WR)
*
* Generates a RapidIO maintenance transaction (Read or Write).
* Returns %0 on success and %-EINVAL or %-EFAULT on failure.
*/
static int tsi721_maint_dma(struct tsi721_device *priv, u32 sys_size,
u16 destid, u8 hopcount, u32 offset, int len,
u32 *data, int do_wr)
{
void __iomem *regs = priv->regs + TSI721_DMAC_BASE(priv->mdma.ch_id);
struct tsi721_dma_desc *bd_ptr;
u32 rd_count, swr_ptr, ch_stat;
unsigned long flags;
int i, err = 0;
u32 op = do_wr ? MAINT_WR : MAINT_RD;
if (offset > (RIO_MAINT_SPACE_SZ - len) || (len != sizeof(u32)))
return -EINVAL;
spin_lock_irqsave(&tsi721_maint_lock, flags);
bd_ptr = priv->mdma.bd_base;
rd_count = ioread32(regs + TSI721_DMAC_DRDCNT);
/* Initialize DMA descriptor */
bd_ptr[0].type_id = cpu_to_le32((DTYPE2 << 29) | (op << 19) | destid);
bd_ptr[0].bcount = cpu_to_le32((sys_size << 26) | 0x04);
bd_ptr[0].raddr_lo = cpu_to_le32((hopcount << 24) | offset);
bd_ptr[0].raddr_hi = 0;
if (do_wr)
bd_ptr[0].data[0] = cpu_to_be32p(data);
else
bd_ptr[0].data[0] = 0xffffffff;
mb();
/* Start DMA operation */
iowrite32(rd_count + 2, regs + TSI721_DMAC_DWRCNT);
ioread32(regs + TSI721_DMAC_DWRCNT);
i = 0;
/* Wait until DMA transfer is finished */
while ((ch_stat = ioread32(regs + TSI721_DMAC_STS))
& TSI721_DMAC_STS_RUN) {
udelay(1);
if (++i >= 5000000) {
tsi_debug(MAINT, &priv->pdev->dev,
"DMA[%d] read timeout ch_status=%x",
priv->mdma.ch_id, ch_stat);
if (!do_wr)
*data = 0xffffffff;
err = -EIO;
goto err_out;
}
}
if (ch_stat & TSI721_DMAC_STS_ABORT) {
/* If DMA operation aborted due to error,
* reinitialize DMA channel
*/
tsi_debug(MAINT, &priv->pdev->dev, "DMA ABORT ch_stat=%x",
ch_stat);
tsi_debug(MAINT, &priv->pdev->dev,
"OP=%d : destid=%x hc=%x off=%x",
do_wr ? MAINT_WR : MAINT_RD,
destid, hopcount, offset);
iowrite32(TSI721_DMAC_INT_ALL, regs + TSI721_DMAC_INT);
iowrite32(TSI721_DMAC_CTL_INIT, regs + TSI721_DMAC_CTL);
udelay(10);
iowrite32(0, regs + TSI721_DMAC_DWRCNT);
udelay(1);
if (!do_wr)
*data = 0xffffffff;
err = -EIO;
goto err_out;
}
if (!do_wr)
*data = be32_to_cpu(bd_ptr[0].data[0]);
/*
* Update descriptor status FIFO RD pointer.
* NOTE: Skipping check and clear FIFO entries because we are waiting
* for transfer to be completed.
*/
swr_ptr = ioread32(regs + TSI721_DMAC_DSWP);
iowrite32(swr_ptr, regs + TSI721_DMAC_DSRP);
err_out:
spin_unlock_irqrestore(&tsi721_maint_lock, flags);
return err;
}
/**
* tsi721_cread_dma - Generate a RapidIO maintenance read transaction
* using Tsi721 BDMA engine.
* @mport: RapidIO master port control structure
* @index: ID of RapdiIO interface
* @destid: Destination ID of transaction
* @hopcount: Number of hops to target device
* @offset: Offset into configuration space
* @len: Length (in bytes) of the maintenance transaction
* @val: Location to be read into
*
* Generates a RapidIO maintenance read transaction.
* Returns %0 on success and %-EINVAL or %-EFAULT on failure.
*/
static int tsi721_cread_dma(struct rio_mport *mport, int index, u16 destid,
u8 hopcount, u32 offset, int len, u32 *data)
{
struct tsi721_device *priv = mport->priv;
return tsi721_maint_dma(priv, mport->sys_size, destid, hopcount,
offset, len, data, 0);
}
/**
* tsi721_cwrite_dma - Generate a RapidIO maintenance write transaction
* using Tsi721 BDMA engine
* @mport: RapidIO master port control structure
* @index: ID of RapdiIO interface
* @destid: Destination ID of transaction
* @hopcount: Number of hops to target device
* @offset: Offset into configuration space
* @len: Length (in bytes) of the maintenance transaction
* @val: Value to be written
*
* Generates a RapidIO maintenance write transaction.
* Returns %0 on success and %-EINVAL or %-EFAULT on failure.
*/
static int tsi721_cwrite_dma(struct rio_mport *mport, int index, u16 destid,
u8 hopcount, u32 offset, int len, u32 data)
{
struct tsi721_device *priv = mport->priv;
u32 temp = data;
return tsi721_maint_dma(priv, mport->sys_size, destid, hopcount,
offset, len, &temp, 1);
}
/**
* tsi721_pw_handler - Tsi721 inbound port-write interrupt handler
* @priv: tsi721 device private structure
*
* Handles inbound port-write interrupts. Copies PW message from an internal
* buffer into PW message FIFO and schedules deferred routine to process
* queued messages.
*/
static int
tsi721_pw_handler(struct tsi721_device *priv)
{
u32 pw_stat;
u32 pw_buf[TSI721_RIO_PW_MSG_SIZE/sizeof(u32)];
pw_stat = ioread32(priv->regs + TSI721_RIO_PW_RX_STAT);
if (pw_stat & TSI721_RIO_PW_RX_STAT_PW_VAL) {
pw_buf[0] = ioread32(priv->regs + TSI721_RIO_PW_RX_CAPT(0));
pw_buf[1] = ioread32(priv->regs + TSI721_RIO_PW_RX_CAPT(1));
pw_buf[2] = ioread32(priv->regs + TSI721_RIO_PW_RX_CAPT(2));
pw_buf[3] = ioread32(priv->regs + TSI721_RIO_PW_RX_CAPT(3));
/* Queue PW message (if there is room in FIFO),
* otherwise discard it.
*/
spin_lock(&priv->pw_fifo_lock);
if (kfifo_avail(&priv->pw_fifo) >= TSI721_RIO_PW_MSG_SIZE)
kfifo_in(&priv->pw_fifo, pw_buf,
TSI721_RIO_PW_MSG_SIZE);
else
priv->pw_discard_count++;
spin_unlock(&priv->pw_fifo_lock);
}
/* Clear pending PW interrupts */
iowrite32(TSI721_RIO_PW_RX_STAT_PW_DISC | TSI721_RIO_PW_RX_STAT_PW_VAL,
priv->regs + TSI721_RIO_PW_RX_STAT);
schedule_work(&priv->pw_work);
return 0;
}
static void tsi721_pw_dpc(struct work_struct *work)
{
struct tsi721_device *priv = container_of(work, struct tsi721_device,
pw_work);
union rio_pw_msg pwmsg;
/*
* Process port-write messages
*/
while (kfifo_out_spinlocked(&priv->pw_fifo, (unsigned char *)&pwmsg,
TSI721_RIO_PW_MSG_SIZE, &priv->pw_fifo_lock)) {
/* Pass the port-write message to RIO core for processing */
rio_inb_pwrite_handler(&priv->mport, &pwmsg);
}
}
/**
* tsi721_pw_enable - enable/disable port-write interface init
* @mport: Master port implementing the port write unit
* @enable: 1=enable; 0=disable port-write message handling
*/
static int tsi721_pw_enable(struct rio_mport *mport, int enable)
{
struct tsi721_device *priv = mport->priv;
u32 rval;
rval = ioread32(priv->regs + TSI721_RIO_EM_INT_ENABLE);
if (enable)
rval |= TSI721_RIO_EM_INT_ENABLE_PW_RX;
else
rval &= ~TSI721_RIO_EM_INT_ENABLE_PW_RX;
/* Clear pending PW interrupts */
iowrite32(TSI721_RIO_PW_RX_STAT_PW_DISC | TSI721_RIO_PW_RX_STAT_PW_VAL,
priv->regs + TSI721_RIO_PW_RX_STAT);
/* Update enable bits */
iowrite32(rval, priv->regs + TSI721_RIO_EM_INT_ENABLE);
return 0;
}
/**
* tsi721_dsend - Send a RapidIO doorbell
* @mport: RapidIO master port info
* @index: ID of RapidIO interface
* @destid: Destination ID of target device
* @data: 16-bit info field of RapidIO doorbell
*
* Sends a RapidIO doorbell message. Always returns %0.
*/
static int tsi721_dsend(struct rio_mport *mport, int index,
u16 destid, u16 data)
{
struct tsi721_device *priv = mport->priv;
u32 offset;
offset = (((mport->sys_size) ? RIO_TT_CODE_16 : RIO_TT_CODE_8) << 18) |
(destid << 2);
tsi_debug(DBELL, &priv->pdev->dev,
"Send Doorbell 0x%04x to destID 0x%x", data, destid);
iowrite16be(data, priv->odb_base + offset);
return 0;
}
/**
* tsi721_dbell_handler - Tsi721 doorbell interrupt handler
* @priv: tsi721 device-specific data structure
*
* Handles inbound doorbell interrupts. Copies doorbell entry from an internal
* buffer into DB message FIFO and schedules deferred routine to process
* queued DBs.
*/
static int
tsi721_dbell_handler(struct tsi721_device *priv)
{
u32 regval;
/* Disable IDB interrupts */
regval = ioread32(priv->regs + TSI721_SR_CHINTE(IDB_QUEUE));
regval &= ~TSI721_SR_CHINT_IDBQRCV;
iowrite32(regval,
priv->regs + TSI721_SR_CHINTE(IDB_QUEUE));
schedule_work(&priv->idb_work);
return 0;
}
static void tsi721_db_dpc(struct work_struct *work)
{
struct tsi721_device *priv = container_of(work, struct tsi721_device,
idb_work);
struct rio_mport *mport;
struct rio_dbell *dbell;
int found = 0;
u32 wr_ptr, rd_ptr;
u64 *idb_entry;
u32 regval;
union {
u64 msg;
u8 bytes[8];
} idb;
/*
* Process queued inbound doorbells
*/
mport = &priv->mport;
wr_ptr = ioread32(priv->regs + TSI721_IDQ_WP(IDB_QUEUE)) % IDB_QSIZE;
rd_ptr = ioread32(priv->regs + TSI721_IDQ_RP(IDB_QUEUE)) % IDB_QSIZE;
while (wr_ptr != rd_ptr) {
idb_entry = (u64 *)(priv->idb_base +
(TSI721_IDB_ENTRY_SIZE * rd_ptr));
rd_ptr++;
rd_ptr %= IDB_QSIZE;
idb.msg = *idb_entry;
*idb_entry = 0;
/* Process one doorbell */
list_for_each_entry(dbell, &mport->dbells, node) {
if ((dbell->res->start <= DBELL_INF(idb.bytes)) &&
(dbell->res->end >= DBELL_INF(idb.bytes))) {
found = 1;
break;
}
}
if (found) {
dbell->dinb(mport, dbell->dev_id, DBELL_SID(idb.bytes),
DBELL_TID(idb.bytes), DBELL_INF(idb.bytes));
} else {
tsi_debug(DBELL, &priv->pdev->dev,
"spurious IDB sid %2.2x tid %2.2x info %4.4x",
DBELL_SID(idb.bytes), DBELL_TID(idb.bytes),
DBELL_INF(idb.bytes));
}
wr_ptr = ioread32(priv->regs +
TSI721_IDQ_WP(IDB_QUEUE)) % IDB_QSIZE;
}
iowrite32(rd_ptr & (IDB_QSIZE - 1),
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,
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 (tsi721_device 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 tsi721_device *priv = (struct tsi721_device *)ptr;
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(priv);
else
tsi_info(&priv->pdev->dev,
"Unsupported SR_CH_INT %x", 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(priv);
}
#ifdef CONFIG_RAPIDIO_DMA_ENGINE
if (dev_int & TSI721_DEV_INT_BDMA_CH) {
int ch;
if (dev_ch_int & TSI721_INT_BDMA_CHAN_M) {
tsi_debug(DMA, &priv->pdev->dev,
"IRQ from DMA channel 0x%08x", 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 (tsi721_device structure)
*
* Handles outbound messaging interrupts signaled using MSI-X.
*/
static irqreturn_t tsi721_omsg_msix(int irq, void *ptr)
{
struct tsi721_device *priv = (struct tsi721_device *)ptr;
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 (tsi721_device structure)
*
* Handles inbound messaging interrupts signaled using MSI-X.
*/
static irqreturn_t tsi721_imsg_msix(int irq, void *ptr)
{
struct tsi721_device *priv = (struct tsi721_device *)ptr;
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 (tsi721_device structure)
*
* Handles Tsi721 interrupts from SRIO MAC.
*/
static irqreturn_t tsi721_srio_msix(int irq, void *ptr)
{
struct tsi721_device *priv = (struct tsi721_device *)ptr;
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(priv);
return IRQ_HANDLED;
}
/**
* tsi721_sr2pc_ch_msix - Tsi721 MSI-X SR2PC Channel interrupt handler
* @irq: Linux interrupt number
* @ptr: Pointer to interrupt-specific data (tsi721_device 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 tsi721_device *)ptr;
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(priv);
/* 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.
* @priv: tsi721 device-specific data 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 tsi721_device *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 *)priv);
if (err)
return err;
err = request_irq(priv->msix[TSI721_VECT_PWRX].vector,
tsi721_srio_msix, 0,
priv->msix[TSI721_VECT_PWRX].irq_name, (void *)priv);
if (err) {
free_irq(priv->msix[TSI721_VECT_IDB].vector, (void *)priv);
return err;
}
return 0;
}
/**
* 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) {
tsi_err(&priv->pdev->dev,
"Failed to enable MSI-X (err=%d)", 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 tsi721_device *priv)
{
int err;
#ifdef CONFIG_PCI_MSI
if (priv->flags & TSI721_USING_MSIX)
err = tsi721_request_msix(priv);
else
#endif
err = request_irq(priv->pdev->irq, tsi721_irqhandler,
(priv->flags & TSI721_USING_MSI) ? 0 : IRQF_SHARED,
DRV_NAME, (void *)priv);
if (err)
tsi_err(&priv->pdev->dev,
"Unable to allocate interrupt, err=%d", err);
return err;
}
static void tsi721_free_irq(struct tsi721_device *priv)
{
#ifdef CONFIG_PCI_MSI
if (priv->flags & TSI721_USING_MSIX) {
free_irq(priv->msix[TSI721_VECT_IDB].vector, (void *)priv);
free_irq(priv->msix[TSI721_VECT_PWRX].vector, (void *)priv);
} else
#endif
free_irq(priv->pdev->irq, (void *)priv);
}
static int
tsi721_obw_alloc(struct tsi721_device *priv, struct tsi721_obw_bar *pbar,
u32 size, int *win_id)
{
u64 win_base;
u64 bar_base;
u64 bar_end;
u32 align;
struct tsi721_ob_win *win;
struct tsi721_ob_win *new_win = NULL;
int new_win_idx = -1;
int i = 0;
bar_base = pbar->base;
bar_end = bar_base + pbar->size;
win_base = bar_base;
align = size/TSI721_PC2SR_ZONES;
while (i < TSI721_IBWIN_NUM) {
for (i = 0; i < TSI721_IBWIN_NUM; i++) {
if (!priv->ob_win[i].active) {
if (new_win == NULL) {
new_win = &priv->ob_win[i];
new_win_idx = i;
}
continue;
}
/*
* If this window belongs to the current BAR check it
* for overlap
*/
win = &priv->ob_win[i];
if (win->base >= bar_base && win->base < bar_end) {
if (win_base < (win->base + win->size) &&
(win_base + size) > win->base) {
/* Overlap detected */
win_base = win->base + win->size;
win_base = ALIGN(win_base, align);
break;
}
}
}
}
if (win_base + size > bar_end)
return -ENOMEM;
if (!new_win) {
tsi_err(&priv->pdev->dev, "OBW count tracking failed");
return -EIO;
}
new_win->active = true;
new_win->base = win_base;
new_win->size = size;
new_win->pbar = pbar;
priv->obwin_cnt--;
pbar->free -= size;
*win_id = new_win_idx;
return 0;
}
static int tsi721_map_outb_win(struct rio_mport *mport, u16 destid, u64 rstart,
u32 size, u32 flags, dma_addr_t *laddr)
{
struct tsi721_device *priv = mport->priv;
int i;
struct tsi721_obw_bar *pbar;
struct tsi721_ob_win *ob_win;
int obw = -1;
u32 rval;
u64 rio_addr;
u32 zsize;
int ret = -ENOMEM;
tsi_debug(OBW, &priv->pdev->dev,
"did=%d ra=0x%llx sz=0x%x", destid, rstart, size);
if (!is_power_of_2(size) || (size < 0x8000) || (rstart & (size - 1)))
return -EINVAL;
if (priv->obwin_cnt == 0)
return -EBUSY;
for (i = 0; i < 2; i++) {
if (priv->p2r_bar[i].free >= size) {
pbar = &priv->p2r_bar[i];
ret = tsi721_obw_alloc(priv, pbar, size, &obw);
if (!ret)
break;
}
}
if (ret)
return ret;
WARN_ON(obw == -1);
ob_win = &priv->ob_win[obw];
ob_win->destid = destid;
ob_win->rstart = rstart;
tsi_debug(OBW, &priv->pdev->dev,
"allocated OBW%d @%llx", obw, ob_win->base);
/*
* Configure Outbound Window
*/
zsize = size/TSI721_PC2SR_ZONES;
rio_addr = rstart;
/*
* Program Address Translation Zones:
* This implementation uses all 8 zones associated wit window.
*/
for (i = 0; i < TSI721_PC2SR_ZONES; i++) {
while (ioread32(priv->regs + TSI721_ZONE_SEL) &
TSI721_ZONE_SEL_GO) {
udelay(1);
}
rval = (u32)(rio_addr & TSI721_LUT_DATA0_ADD) |
TSI721_LUT_DATA0_NREAD | TSI721_LUT_DATA0_NWR;
iowrite32(rval, priv->regs + TSI721_LUT_DATA0);
rval = (u32)(rio_addr >> 32);
iowrite32(rval, priv->regs + TSI721_LUT_DATA1);
rval = destid;
iowrite32(rval, priv->regs + TSI721_LUT_DATA2);
rval = TSI721_ZONE_SEL_GO | (obw << 3) | i;
iowrite32(rval, priv->regs + TSI721_ZONE_SEL);
rio_addr += zsize;
}
iowrite32(TSI721_OBWIN_SIZE(size) << 8,
priv->regs + TSI721_OBWINSZ(obw));
iowrite32((u32)(ob_win->base >> 32), priv->regs + TSI721_OBWINUB(obw));
iowrite32((u32)(ob_win->base & TSI721_OBWINLB_BA) | TSI721_OBWINLB_WEN,
priv->regs + TSI721_OBWINLB(obw));
*laddr = ob_win->base;
return 0;
}
static void tsi721_unmap_outb_win(struct rio_mport *mport,
u16 destid, u64 rstart)
{
struct tsi721_device *priv = mport->priv;
struct tsi721_ob_win *ob_win;
int i;
tsi_debug(OBW, &priv->pdev->dev, "did=%d ra=0x%llx", destid, rstart);
for (i = 0; i < TSI721_OBWIN_NUM; i++) {
ob_win = &priv->ob_win[i];
if (ob_win->active &&
ob_win->destid == destid && ob_win->rstart == rstart) {
tsi_debug(OBW, &priv->pdev->dev,
"free OBW%d @%llx", i, ob_win->base);
ob_win->active = false;
iowrite32(0, priv->regs + TSI721_OBWINLB(i));
ob_win->pbar->free += ob_win->size;
priv->obwin_cnt++;
break;
}
}
}
/**
* 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, z;
u32 rval;
/* Disable all PC2SR translation windows */
for (i = 0; i < TSI721_OBWIN_NUM; i++)
iowrite32(0, priv->regs + TSI721_OBWINLB(i));
/* Initialize zone lookup tables to avoid ECC errors on reads */
iowrite32(0, priv->regs + TSI721_LUT_DATA0);
iowrite32(0, priv->regs + TSI721_LUT_DATA1);
iowrite32(0, priv->regs + TSI721_LUT_DATA2);
for (i = 0; i < TSI721_OBWIN_NUM; i++) {
for (z = 0; z < TSI721_PC2SR_ZONES; z++) {
while (ioread32(priv->regs + TSI721_ZONE_SEL) &
TSI721_ZONE_SEL_GO) {
udelay(1);
}
rval = TSI721_ZONE_SEL_GO | (i << 3) | z;
iowrite32(rval, priv->regs + TSI721_ZONE_SEL);
}
}
if (priv->p2r_bar[0].size == 0 && priv->p2r_bar[1].size == 0) {
priv->obwin_cnt = 0;
return;
}
priv->p2r_bar[0].free = priv->p2r_bar[0].size;
priv->p2r_bar[1].free = priv->p2r_bar[1].size;
for (i = 0; i < TSI721_OBWIN_NUM; i++)
priv->ob_win[i].active = false;
priv->obwin_cnt = TSI721_OBWIN_NUM;
}
/**
* 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, u64 size, u32 flags)
{
struct tsi721_device *priv = mport->priv;
int i, avail = -1;
u32 regval;
struct tsi721_ib_win *ib_win;
bool direct = (lstart == rstart);
u64 ibw_size;
dma_addr_t loc_start;
u64 ibw_start;
struct tsi721_ib_win_mapping *map = NULL;
int ret = -EBUSY;
/* Max IBW size supported by HW is 16GB */
if (size > 0x400000000UL)
return -EINVAL;
if (direct) {
/* Calculate minimal acceptable window size and base address */
ibw_size = roundup_pow_of_two(size);
ibw_start = lstart & ~(ibw_size - 1);
tsi_debug(IBW, &priv->pdev->dev,
"Direct (RIO_0x%llx -> PCIe_%pad), size=0x%llx, ibw_start = 0x%llx",
rstart, &lstart, size, ibw_start);
while ((lstart + size) > (ibw_start + ibw_size)) {
ibw_size *= 2;
ibw_start = lstart & ~(ibw_size - 1);
/* Check for crossing IBW max size 16GB */
if (ibw_size > 0x400000000UL)
return -EBUSY;
}
loc_start = ibw_start;
map = kzalloc(sizeof(struct tsi721_ib_win_mapping), GFP_ATOMIC);
if (map == NULL)
return -ENOMEM;
} else {
tsi_debug(IBW, &priv->pdev->dev,
"Translated (RIO_0x%llx -> PCIe_%pad), size=0x%llx",
rstart, &lstart, size);
if (!is_power_of_2(size) || size < 0x1000 ||
((u64)lstart & (size - 1)) || (rstart & (size - 1)))
return -EINVAL;
if (priv->ibwin_cnt == 0)
return -EBUSY;
ibw_start = rstart;
ibw_size = size;
loc_start = lstart;
}
/*
* Scan for overlapping with active regions and mark the first available
* IB window at the same time.
*/
for (i = 0; i < TSI721_IBWIN_NUM; i++) {
ib_win = &priv->ib_win[i];
if (!ib_win->active) {
if (avail == -1) {
avail = i;
ret = 0;
}
} else if (ibw_start < (ib_win->rstart + ib_win->size) &&
(ibw_start + ibw_size) > ib_win->rstart) {
/* Return error if address translation involved */
if (!direct || ib_win->xlat) {
ret = -EFAULT;
break;
}
/*
* Direct mappings usually are larger than originally
* requested fragments - check if this new request fits
* into it.
*/
if (rstart >= ib_win->rstart &&
(rstart + size) <= (ib_win->rstart +
ib_win->size)) {
/* We are in - no further mapping required */
map->lstart = lstart;
list_add_tail(&map->node, &ib_win->mappings);
return 0;
}
ret = -EFAULT;
break;
}
}
if (ret)
goto out;
i = avail;
/* Sanity check: available IB window must be disabled at this point */
regval = ioread32(priv->regs + TSI721_IBWIN_LB(i));
if (WARN_ON(regval & TSI721_IBWIN_LB_WEN)) {
ret = -EIO;
goto out;
}
ib_win = &priv->ib_win[i];
ib_win->active = true;
ib_win->rstart = ibw_start;
ib_win->lstart = loc_start;
ib_win->size = ibw_size;
ib_win->xlat = (lstart != rstart);
INIT_LIST_HEAD(&ib_win->mappings);
/*
* When using direct IBW mapping and have larger than requested IBW size
* we can have multiple local memory blocks mapped through the same IBW
* To handle this situation we maintain list of "clients" for such IBWs.
*/
if (direct) {
map->lstart = lstart;
list_add_tail(&map->node, &ib_win->mappings);
}
iowrite32(TSI721_IBWIN_SIZE(ibw_size) << 8,
priv->regs + TSI721_IBWIN_SZ(i));
iowrite32(((u64)loc_start >> 32), priv->regs + TSI721_IBWIN_TUA(i));
iowrite32(((u64)loc_start & TSI721_IBWIN_TLA_ADD),
priv->regs + TSI721_IBWIN_TLA(i));
iowrite32(ibw_start >> 32, priv->regs + TSI721_IBWIN_UB(i));
iowrite32((ibw_start & TSI721_IBWIN_LB_BA) | TSI721_IBWIN_LB_WEN,
priv->regs + TSI721_IBWIN_LB(i));
priv->ibwin_cnt--;
tsi_debug(IBW, &priv->pdev->dev,
"Configured IBWIN%d (RIO_0x%llx -> PCIe_%pad), size=0x%llx",
i, ibw_start, &loc_start, ibw_size);
return 0;
out:
kfree(map);
return ret;
}
/**
* tsi721_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;
struct tsi721_ib_win *ib_win;
int i;
tsi_debug(IBW, &priv->pdev->dev,
"Unmap IBW mapped to PCIe_%pad", &lstart);
/* Search for matching active inbound translation window */
for (i = 0; i < TSI721_IBWIN_NUM; i++) {
ib_win = &priv->ib_win[i];
/* Address translating IBWs must to be an exact march */
if (!ib_win->active ||
(ib_win->xlat && lstart != ib_win->lstart))
continue;
if (lstart >= ib_win->lstart &&
lstart < (ib_win->lstart + ib_win->size)) {
if (!ib_win->xlat) {
struct tsi721_ib_win_mapping *map;
int found = 0;
list_for_each_entry(map,
&ib_win->mappings, node) {
if (map->lstart == lstart) {
list_del(&map->node);
kfree(map);
found = 1;
break;
}
}
if (!found)
continue;
if (!list_empty(&ib_win->mappings))
break;
}
tsi_debug(IBW, &priv->pdev->dev, "Disable IBWIN_%d", i);
iowrite32(0, priv->regs + TSI721_IBWIN_LB(i));
ib_win->active = false;
priv->ibwin_cnt++;
break;
}
}
if (i == TSI721_IBWIN_NUM)
tsi_debug(IBW, &priv->pdev->dev,
"IB window mapped to %pad not found", &lstart);
}
/**
* 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));
priv->ibwin_cnt = TSI721_IBWIN_NUM;
}
/*
* tsi721_close_sr2pc_mapping - closes all active inbound (SRIO->PCIe)
* translation regions.
* @priv: pointer to tsi721 device private data
*/
static void tsi721_close_sr2pc_mapping(struct tsi721_device *priv)
{
struct tsi721_ib_win *ib_win;
int i;
/* Disable all active SR2PC inbound windows */
for (i = 0; i < TSI721_IBWIN_NUM; i++) {
ib_win = &priv->ib_win[i];
if (ib_win->active) {
iowrite32(0, priv->regs + TSI721_IBWIN_LB(i));
ib_win->active = false;
}
}
}
/**
* 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)) {
tsi_err(&priv->pdev->dev, "PW FIFO allocation failed");
return -ENOMEM;
}
/* Use reliable port-write capture mode */
iowrite32(TSI721_RIO_PW_CTL_PWC_REL, priv->regs + TSI721_RIO_PW_CTL);
return 0;
}
static void tsi721_port_write_free(struct tsi721_device *priv)
{
kfifo_free(&priv->pw_fifo);
}
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;
tsi_debug(DBELL, &priv->pdev->dev,
"Allocated IDB buffer @ %p (phys = %pad)",
priv->idb_base, &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;
tsi_debug(MAINT, &priv->pdev->dev,
"Init BDMA_%d Maintenance requests", 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;
tsi_debug(MAINT, &priv->pdev->dev, "DMA descriptors @ %p (phys = %pad)",
bd_ptr, &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;
tsi_debug(MAINT, &priv->pdev->dev,
"desc status FIFO @ %p (phys = %pad) size=0x%x",
sts_ptr, &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;
unsigned long flags;
if (!priv->omsg_init[mbox] ||
len > TSI721_MSG_MAX_SIZE || len < 8)
return -EINVAL;
spin_lock_irqsave(&priv->omsg_ring[mbox].lock, flags);
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);
#ifdef TSI721_OMSG_DESC_INT
/* Request IOF_DONE interrupt generation for each N-th frame in queue */
if (tx_slot % 4 == 0)
desc[tx_slot].type_id |= cpu_to_le32(TSI721_OMD_IOF);
#endif
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));
spin_unlock_irqrestore(&priv->omsg_ring[mbox].lock, flags);
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;
struct rio_mport *mport = &priv->mport;
void *dev_id = NULL;
u32 tx_slot = 0xffffffff;
int do_callback = 0;
spin_lock(&priv->omsg_ring[ch].lock);
omsg_int = ioread32(priv->regs + TSI721_OBDMAC_INT(ch));
if (omsg_int & TSI721_OBDMAC_INT_ST_FULL)
tsi_info(&priv->pdev->dev,
"OB MBOX%d: Status FIFO is full", 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;
/*
* 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 (!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;
}
if (tx_slot >= priv->omsg_ring[ch].size)
tsi_debug(OMSG, &priv->pdev->dev,
"OB_MSG tx_slot=%x > size=%x",
tx_slot, priv->omsg_ring[ch].size);
WARN_ON(tx_slot >= priv->omsg_ring[ch].size);
/* Move slot index to the next message to be sent */
++tx_slot;
if (tx_slot == priv->omsg_ring[ch].size)
tx_slot = 0;
dev_id = priv->omsg_ring[ch].dev_id;
do_callback = 1;
}
no_sts_update:
if (omsg_int & TSI721_OBDMAC_INT_ERROR) {
/*
* Outbound message operation aborted due to error,
* reinitialize OB MSG channel
*/
tsi_debug(OMSG, &priv->pdev->dev, "OB MSG ABORT ch_stat=%x",
ioread32(priv->regs + TSI721_OBDMAC_STS(ch)));
iowrite32(TSI721_OBDMAC_INT_ERROR,
priv->regs + TSI721_OBDMAC_INT(ch));
iowrite32(TSI721_OBDMAC_CTL_RETRY_THR | 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 */
dev_id = priv->omsg_ring[ch].dev_id;
tx_slot = priv->omsg_ring[ch].tx_slot;
do_callback = 1;
/* 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);
if (mport->outb_msg[ch].mcback && do_callback)
mport->outb_msg[ch].mcback(mport, dev_id, ch, tx_slot);
}
/**
* 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;
}
if ((mbox_sel & (1 << mbox)) == 0) {
rc = -ENODEV;
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) {
tsi_debug(OMSG, &priv->pdev->dev,
"ENOMEM for OB_MSG_%d data buffer", 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) {
tsi_debug(OMSG, &priv->pdev->dev,
"ENOMEM for OB_MSG_%d descriptor memory", 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) {
tsi_debug(OMSG, &priv->pdev->dev,
"ENOMEM for OB_MSG_%d status FIFO", 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) {
int idx = TSI721_VECT_OMB0_DONE + mbox;
/* Request interrupt service if we are in MSI-X mode */
rc = request_irq(priv->msix[idx].vector, tsi721_omsg_msix, 0,
priv->msix[idx].irq_name, (void *)priv);
if (rc) {
tsi_debug(OMSG, &priv->pdev->dev,
"Unable to get MSI-X IRQ for OBOX%d-DONE",
mbox);
goto out_stat;
}
idx = TSI721_VECT_OMB0_INT + mbox;
rc = request_irq(priv->msix[idx].vector, tsi721_omsg_msix, 0,
priv->msix[idx].irq_name, (void *)priv);
if (rc) {
tsi_debug(OMSG, &priv->pdev->dev,
"Unable to get MSI-X IRQ for MBOX%d-INT", mbox);
idx = TSI721_VECT_OMB0_DONE + mbox;
free_irq(priv->msix[idx].vector, (void *)priv);
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_RETRY_THR | 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 *)priv);
free_irq(priv->msix[TSI721_VECT_OMB0_INT + mbox].vector,
(void *)priv);
}
#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;
struct rio_mport *mport = &priv->mport;
spin_lock(&priv->imsg_ring[mbox].lock);
imsg_int = ioread32(priv->regs + TSI721_IBDMAC_INT(ch));
if (imsg_int & TSI721_IBDMAC_INT_SRTO)
tsi_info(&priv->pdev->dev, "IB MBOX%d SRIO timeout", mbox);
if (imsg_int & TSI721_IBDMAC_INT_PC_ERROR)
tsi_info(&priv->pdev->dev, "IB MBOX%d PCIe error", mbox);
if (imsg_int & TSI721_IBDMAC_INT_FQ_LOW)
tsi_info(&priv->pdev->dev, "IB MBOX%d IB free queue low", 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 &&
mport->inb_msg[mbox].mcback)
mport->inb_msg[mbox].mcback(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;
}
if ((mbox_sel & (1 << mbox)) == 0) {
rc = -ENODEV;
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) {
tsi_err(&priv->pdev->dev,
"Failed to allocate buffers for IB MBOX%d", 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) {
tsi_err(&priv->pdev->dev,
"Failed to allocate free queue for IB MBOX%d", 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) {
tsi_err(&priv->pdev->dev,
"Failed to allocate descriptor memory for IB MBOX%d",
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) {
int idx = TSI721_VECT_IMB0_RCV + mbox;
/* Request interrupt service if we are in MSI-X mode */
rc = request_irq(priv->msix[idx].vector, tsi721_imsg_msix, 0,
priv->msix[idx].irq_name, (void *)priv);
if (rc) {
tsi_debug(IMSG, &priv->pdev->dev,
"Unable to get MSI-X IRQ for IBOX%d-DONE",
mbox);
goto out_desc;
}
idx = TSI721_VECT_IMB0_INT + mbox;
rc = request_irq(priv->msix[idx].vector, tsi721_imsg_msix, 0,
priv->msix[idx].irq_name, (void *)priv);
if (rc) {
tsi_debug(IMSG, &priv->pdev->dev,
"Unable to get MSI-X IRQ for IBOX%d-INT", mbox);
free_irq(
priv->msix[TSI721_VECT_IMB0_RCV + mbox].vector,
(void *)priv);
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 *)priv);
free_irq(priv->msix[TSI721_VECT_IMB0_INT + mbox].vector,
(void *)priv);
}
#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]) {
tsi_err(&priv->pdev->dev,
"Error adding inbound buffer %d, buffer exists",
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_query_mport - 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 int tsi721_query_mport(struct rio_mport *mport,
struct rio_mport_attr *attr)
{
struct tsi721_device *priv = mport->priv;
u32 rval;
rval = ioread32(priv->regs + 0x100 + RIO_PORT_N_ERR_STS_CSR(0, 0));
if (rval & RIO_PORT_N_ERR_STS_PORT_OK) {
rval = ioread32(priv->regs + 0x100 + RIO_PORT_N_CTL2_CSR(0, 0));
attr->link_speed = (rval & RIO_PORT_N_CTL2_SEL_BAUD) >> 28;
rval = ioread32(priv->regs + 0x100 + RIO_PORT_N_CTL_CSR(0, 0));
attr->link_width = (rval & RIO_PORT_N_CTL_IPW) >> 27;
} else
attr->link_speed = RIO_LINK_DOWN;
#ifdef CONFIG_RAPIDIO_DMA_ENGINE
attr->flags = RIO_MPORT_DMA | RIO_MPORT_DMA_SG;
attr->dma_max_sge = 0;
attr->dma_max_size = TSI721_BDMA_MAX_BCOUNT;
attr->dma_align = 0;
#else
attr->flags = 0;
#endif
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);
}
static struct rio_ops tsi721_rio_ops = {
.lcread = tsi721_lcread,
.lcwrite = tsi721_lcwrite,
.cread = tsi721_cread_dma,
.cwrite = tsi721_cwrite_dma,
.dsend = tsi721_dsend,
.open_inb_mbox = tsi721_open_inb_mbox,
.close_inb_mbox = tsi721_close_inb_mbox,
.open_outb_mbox = tsi721_open_outb_mbox,
.close_outb_mbox = tsi721_close_outb_mbox,
.add_outb_message = tsi721_add_outb_message,
.add_inb_buffer = tsi721_add_inb_buffer,
.get_inb_message = tsi721_get_inb_message,
.map_inb = tsi721_rio_map_inb_mem,
.unmap_inb = tsi721_rio_unmap_inb_mem,
.pwenable = tsi721_pw_enable,
.query_mport = tsi721_query_mport,
.map_outb = tsi721_map_outb_win,
.unmap_outb = tsi721_unmap_outb_win,
};
static void tsi721_mport_release(struct device *dev)
{
struct rio_mport *mport = to_rio_mport(dev);
tsi_debug(EXIT, dev, "%s id=%d", mport->name, mport->id);
}
/**
* 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_mport *mport = &priv->mport;
err = rio_mport_initialize(mport);
if (err)
return err;
mport->ops = &tsi721_rio_ops;
mport->index = 0;
mport->sys_size = 0; /* small system */
mport->priv = (void *)priv;
mport->phys_efptr = 0x100;
mport->phys_rmap = 1;
mport->dev.parent = &pdev->dev;
mport->dev.release = tsi721_mport_release;
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
tsi_debug(MPORT, &pdev->dev,
"MSI/MSI-X is not available. Using legacy INTx.");
#endif /* CONFIG_PCI_MSI */
err = tsi721_request_irq(priv);
if (err) {
tsi_err(&pdev->dev, "Unable to get PCI IRQ %02X (err=0x%x)",
pdev->irq, err);
return err;
}
#ifdef CONFIG_RAPIDIO_DMA_ENGINE
err = tsi721_register_dma(priv);
if (err)
goto err_exit;
#endif
/* Enable SRIO link */
iowrite32(ioread32(priv->regs + TSI721_DEVCTL) |
TSI721_DEVCTL_SRBOOT_CMPL,
priv->regs + TSI721_DEVCTL);
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));
err = rio_register_mport(mport);
if (err) {
tsi721_unregister_dma(priv);
goto err_exit;
}
return 0;
err_exit:
tsi721_free_irq(priv);
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) {
err = -ENOMEM;
goto err_exit;
}
err = pci_enable_device(pdev);
if (err) {
tsi_err(&pdev->dev, "Failed to enable PCI device");
goto err_clean;
}
priv->pdev = pdev;
#ifdef DEBUG
{
int i;
for (i = 0; i <= PCI_STD_RESOURCE_END; i++) {
tsi_debug(INIT, &pdev->dev, "res%d %pR",
i, &pdev->resource[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) {
tsi_err(&pdev->dev, "Missing or misconfigured CSR BAR0");
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) {
tsi_err(&pdev->dev, "Missing or misconfigured Doorbell BAR1");
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.
*/
priv->p2r_bar[0].size = priv->p2r_bar[1].size = 0;
if (pci_resource_flags(pdev, BAR_2) & IORESOURCE_MEM_64) {
if (pci_resource_flags(pdev, BAR_2) & IORESOURCE_PREFETCH)
tsi_debug(INIT, &pdev->dev,
"Prefetchable OBW BAR2 will not be used");
else {
priv->p2r_bar[0].base = pci_resource_start(pdev, BAR_2);
priv->p2r_bar[0].size = pci_resource_len(pdev, BAR_2);
}
}
if (pci_resource_flags(pdev, BAR_4) & IORESOURCE_MEM_64) {
if (pci_resource_flags(pdev, BAR_4) & IORESOURCE_PREFETCH)
tsi_debug(INIT, &pdev->dev,
"Prefetchable OBW BAR4 will not be used");
else {
priv->p2r_bar[1].base = pci_resource_start(pdev, BAR_4);
priv->p2r_bar[1].size = pci_resource_len(pdev, BAR_4);
}
}
err = pci_request_regions(pdev, DRV_NAME);
if (err) {
tsi_err(&pdev->dev, "Unable to obtain PCI resources");
goto err_disable_pdev;
}
pci_set_master(pdev);
priv->regs = pci_ioremap_bar(pdev, BAR_0);
if (!priv->regs) {
tsi_err(&pdev->dev, "Unable to map device registers space");
err = -ENOMEM;
goto err_free_res;
}
priv->odb_base = pci_ioremap_bar(pdev, BAR_1);
if (!priv->odb_base) {
tsi_err(&pdev->dev, "Unable to map outbound doorbells space");
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) {
tsi_err(&pdev->dev, "Unable to set DMA mask");
goto err_unmap_bars;
}
if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)))
tsi_info(&pdev->dev, "Unable to set consistent DMA mask");
} else {
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
if (err)
tsi_info(&pdev->dev, "Unable to set consistent DMA mask");
}
BUG_ON(!pci_is_pcie(pdev));
/* Clear "no snoop" and "relaxed ordering" bits. */
pcie_capability_clear_and_set_word(pdev, PCI_EXP_DEVCTL,
PCI_EXP_DEVCTL_RELAX_EN | PCI_EXP_DEVCTL_NOSNOOP_EN, 0);
/* Override PCIe Maximum Read Request Size setting if requested */
if (pcie_mrrs >= 0) {
if (pcie_mrrs <= 5)
pcie_capability_clear_and_set_word(pdev, PCI_EXP_DEVCTL,
PCI_EXP_DEVCTL_READRQ, pcie_mrrs << 12);
else
tsi_info(&pdev->dev,
"Invalid MRRS override value %d", pcie_mrrs);
}
/* 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)) {
tsi_err(&pdev->dev, "BDMA initialization failed");
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;
pci_set_drvdata(pdev, priv);
tsi721_interrupts_init(priv);
return 0;
err_free_consistent:
tsi721_port_write_free(priv);
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 void tsi721_remove(struct pci_dev *pdev)
{
struct tsi721_device *priv = pci_get_drvdata(pdev);
tsi_debug(EXIT, &pdev->dev, "enter");
tsi721_disable_ints(priv);
tsi721_free_irq(priv);
flush_scheduled_work();
rio_unregister_mport(&priv->mport);
tsi721_unregister_dma(priv);
tsi721_bdma_maint_free(priv);
tsi721_doorbell_free(priv);
tsi721_port_write_free(priv);
tsi721_close_sr2pc_mapping(priv);
if (priv->regs)
iounmap(priv->regs);
if (priv->odb_base)
iounmap(priv->odb_base);
#ifdef CONFIG_PCI_MSI
if (priv->flags & TSI721_USING_MSIX)
pci_disable_msix(priv->pdev);
else if (priv->flags & TSI721_USING_MSI)
pci_disable_msi(priv->pdev);
#endif
pci_release_regions(pdev);
pci_clear_master(pdev);
pci_disable_device(pdev);
pci_set_drvdata(pdev, NULL);
kfree(priv);
tsi_debug(EXIT, &pdev->dev, "exit");
}
static void tsi721_shutdown(struct pci_dev *pdev)
{
struct tsi721_device *priv = pci_get_drvdata(pdev);
tsi_debug(EXIT, &pdev->dev, "enter");
tsi721_disable_ints(priv);
tsi721_dma_stop_all(priv);
pci_clear_master(pdev);
pci_disable_device(pdev);
}
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,
.remove = tsi721_remove,
.shutdown = tsi721_shutdown,
};
module_pci_driver(tsi721_driver);
MODULE_DESCRIPTION("IDT Tsi721 PCIExpress-to-SRIO bridge driver");
MODULE_AUTHOR("Integrated Device Technology, Inc.");
MODULE_LICENSE("GPL");
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