| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Alex Bounine | 14142 | 99.21% | 28 | 63.64% |
| Randy Dunlap | 30 | 0.21% | 2 | 4.55% |
| Ioan Nicu | 23 | 0.16% | 1 | 2.27% |
| Christophe Jaillet | 16 | 0.11% | 1 | 2.27% |
| Tetsuo Handa | 9 | 0.06% | 1 | 2.27% |
| Jiang Liu | 7 | 0.05% | 1 | 2.27% |
| Peter Senna Tschudin | 6 | 0.04% | 1 | 2.27% |
| Benoit Taine | 6 | 0.04% | 1 | 2.27% |
| Luis R. Rodriguez | 4 | 0.03% | 1 | 2.27% |
| Björn Helgaas | 2 | 0.01% | 1 | 2.27% |
| Denis Efremov | 2 | 0.01% | 1 | 2.27% |
| Joe Perches | 2 | 0.01% | 1 | 2.27% |
| Thomas Gleixner | 2 | 0.01% | 1 | 2.27% |
| Ingo Molnar | 2 | 0.01% | 1 | 2.27% |
| Alexander Gordeev | 1 | 0.01% | 1 | 2.27% |
| Matt Porter | 1 | 0.01% | 1 | 2.27% |
| Total | 14255 | 44 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * 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> */ #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 * @data: 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 * @data: 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. * * Returns: %0 */ 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 * * Returns: %0 */ 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. * * 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. * * Returns: %0 */ 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). * * Returns: %IRQ_HANDLED or %IRQ_NONE */ 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. * * Returns: %IRQ_HANDLED */ 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. * * Returns: %IRQ_HANDLED */ 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. * * Returns: %IRQ_HANDLED */ 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. * * Returns: %IRQ_HANDLED */ 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. * * Returns: %0 on success or -errno value on failure. */ 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. * * Returns: %0 on success or -errno value on failure. */ 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_alloc_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_alloc_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_alloc_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 * * Returns: %0 on success or -errno value on failure. */ 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 * * Returns: %0 on success or -errno value on failure. */ 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_alloc_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 * * Returns: %0 on success or -errno value on failure. */ 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 * * Returns: %0 on success or -errno value on failure. */ 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. * * Returns: %0 */ 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 * @attr: mport device attributes * * 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. * * Returns: %0 on success or -errno value on failure. */ 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_NUM_BARS; 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 (dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) { err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); if (err) { tsi_err(&pdev->dev, "Unable to set DMA mask"); goto err_unmap_bars; } if (dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32))) tsi_info(&pdev->dev, "Unable to set consistent DMA mask"); } else { err = dma_set_coherent_mask(&pdev->dev, 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); } /* Set PCIe completion timeout to 1-10ms */ pcie_capability_clear_and_set_word(pdev, PCI_EXP_DEVCTL2, PCI_EXP_DEVCTL2_COMP_TIMEOUT, 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); 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_work(&priv->idb_work); flush_work(&priv->pw_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_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_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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