+++ /dev/null
-/*
- * PCI handling of I2O controller
- *
- * Copyright (C) 1999-2002 Red Hat Software
- *
- * Written by Alan Cox, Building Number Three Ltd
- *
- * 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.
- *
- * A lot of the I2O message side code from this is taken from the Red
- * Creek RCPCI45 adapter driver by Red Creek Communications
- *
- * Fixes/additions:
- * Philipp Rumpf
- * Juha Sievänen <Juha.Sievanen@cs.Helsinki.FI>
- * Auvo Häkkinen <Auvo.Hakkinen@cs.Helsinki.FI>
- * Deepak Saxena <deepak@plexity.net>
- * Boji T Kannanthanam <boji.t.kannanthanam@intel.com>
- * Alan Cox <alan@lxorguk.ukuu.org.uk>:
- * Ported to Linux 2.5.
- * Markus Lidel <Markus.Lidel@shadowconnect.com>:
- * Minor fixes for 2.6.
- * Markus Lidel <Markus.Lidel@shadowconnect.com>:
- * Support for sysfs included.
- */
-
-#include <linux/pci.h>
-#include <linux/interrupt.h>
-#include <linux/slab.h>
-#include "i2o.h"
-#include <linux/module.h>
-#include "core.h"
-
-#define OSM_DESCRIPTION "I2O-subsystem"
-
-/* PCI device id table for all I2O controllers */
-static struct pci_device_id i2o_pci_ids[] = {
- {PCI_DEVICE_CLASS(PCI_CLASS_INTELLIGENT_I2O << 8, 0xffff00)},
- {PCI_DEVICE(PCI_VENDOR_ID_DPT, 0xa511)},
- {.vendor = PCI_VENDOR_ID_INTEL,.device = 0x1962,
- .subvendor = PCI_VENDOR_ID_PROMISE,.subdevice = PCI_ANY_ID},
- {0}
-};
-
-/**
- * i2o_pci_free - Frees the DMA memory for the I2O controller
- * @c: I2O controller to free
- *
- * Remove all allocated DMA memory and unmap memory IO regions. If MTRR
- * is enabled, also remove it again.
- */
-static void i2o_pci_free(struct i2o_controller *c)
-{
- struct device *dev;
-
- dev = &c->pdev->dev;
-
- i2o_dma_free(dev, &c->out_queue);
- i2o_dma_free(dev, &c->status_block);
- kfree(c->lct);
- i2o_dma_free(dev, &c->dlct);
- i2o_dma_free(dev, &c->hrt);
- i2o_dma_free(dev, &c->status);
-
- if (c->raptor && c->in_queue.virt)
- iounmap(c->in_queue.virt);
-
- if (c->base.virt)
- iounmap(c->base.virt);
-
- pci_release_regions(c->pdev);
-}
-
-/**
- * i2o_pci_alloc - Allocate DMA memory, map IO memory for I2O controller
- * @c: I2O controller
- *
- * Allocate DMA memory for a PCI (or in theory AGP) I2O controller. All
- * IO mappings are also done here. If MTRR is enabled, also do add memory
- * regions here.
- *
- * Returns 0 on success or negative error code on failure.
- */
-static int i2o_pci_alloc(struct i2o_controller *c)
-{
- struct pci_dev *pdev = c->pdev;
- struct device *dev = &pdev->dev;
- int i;
-
- if (pci_request_regions(pdev, OSM_DESCRIPTION)) {
- printk(KERN_ERR "%s: device already claimed\n", c->name);
- return -ENODEV;
- }
-
- for (i = 0; i < 6; i++) {
- /* Skip I/O spaces */
- if (!(pci_resource_flags(pdev, i) & IORESOURCE_IO)) {
- if (!c->base.phys) {
- c->base.phys = pci_resource_start(pdev, i);
- c->base.len = pci_resource_len(pdev, i);
-
- /*
- * If we know what card it is, set the size
- * correctly. Code is taken from dpt_i2o.c
- */
- if (pdev->device == 0xa501) {
- if (pdev->subsystem_device >= 0xc032 &&
- pdev->subsystem_device <= 0xc03b) {
- if (c->base.len > 0x400000)
- c->base.len = 0x400000;
- } else {
- if (c->base.len > 0x100000)
- c->base.len = 0x100000;
- }
- }
- if (!c->raptor)
- break;
- } else {
- c->in_queue.phys = pci_resource_start(pdev, i);
- c->in_queue.len = pci_resource_len(pdev, i);
- break;
- }
- }
- }
-
- if (i == 6) {
- printk(KERN_ERR "%s: I2O controller has no memory regions"
- " defined.\n", c->name);
- i2o_pci_free(c);
- return -EINVAL;
- }
-
- /* Map the I2O controller */
- if (c->raptor) {
- printk(KERN_INFO "%s: PCI I2O controller\n", c->name);
- printk(KERN_INFO " BAR0 at 0x%08lX size=%ld\n",
- (unsigned long)c->base.phys, (unsigned long)c->base.len);
- printk(KERN_INFO " BAR1 at 0x%08lX size=%ld\n",
- (unsigned long)c->in_queue.phys,
- (unsigned long)c->in_queue.len);
- } else
- printk(KERN_INFO "%s: PCI I2O controller at %08lX size=%ld\n",
- c->name, (unsigned long)c->base.phys,
- (unsigned long)c->base.len);
-
- c->base.virt = ioremap_nocache(c->base.phys, c->base.len);
- if (!c->base.virt) {
- printk(KERN_ERR "%s: Unable to map controller.\n", c->name);
- i2o_pci_free(c);
- return -ENOMEM;
- }
-
- if (c->raptor) {
- c->in_queue.virt =
- ioremap_nocache(c->in_queue.phys, c->in_queue.len);
- if (!c->in_queue.virt) {
- printk(KERN_ERR "%s: Unable to map controller.\n",
- c->name);
- i2o_pci_free(c);
- return -ENOMEM;
- }
- } else
- c->in_queue = c->base;
-
- c->irq_status = c->base.virt + I2O_IRQ_STATUS;
- c->irq_mask = c->base.virt + I2O_IRQ_MASK;
- c->in_port = c->base.virt + I2O_IN_PORT;
- c->out_port = c->base.virt + I2O_OUT_PORT;
-
- /* Motorola/Freescale chip does not follow spec */
- if (pdev->vendor == PCI_VENDOR_ID_MOTOROLA && pdev->device == 0x18c0) {
- /* Check if CPU is enabled */
- if (be32_to_cpu(readl(c->base.virt + 0x10000)) & 0x10000000) {
- printk(KERN_INFO "%s: MPC82XX needs CPU running to "
- "service I2O.\n", c->name);
- i2o_pci_free(c);
- return -ENODEV;
- } else {
- c->irq_status += I2O_MOTOROLA_PORT_OFFSET;
- c->irq_mask += I2O_MOTOROLA_PORT_OFFSET;
- c->in_port += I2O_MOTOROLA_PORT_OFFSET;
- c->out_port += I2O_MOTOROLA_PORT_OFFSET;
- printk(KERN_INFO "%s: MPC82XX workarounds activated.\n",
- c->name);
- }
- }
-
- if (i2o_dma_alloc(dev, &c->status, 8)) {
- i2o_pci_free(c);
- return -ENOMEM;
- }
-
- if (i2o_dma_alloc(dev, &c->hrt, sizeof(i2o_hrt))) {
- i2o_pci_free(c);
- return -ENOMEM;
- }
-
- if (i2o_dma_alloc(dev, &c->dlct, 8192)) {
- i2o_pci_free(c);
- return -ENOMEM;
- }
-
- if (i2o_dma_alloc(dev, &c->status_block, sizeof(i2o_status_block))) {
- i2o_pci_free(c);
- return -ENOMEM;
- }
-
- if (i2o_dma_alloc(dev, &c->out_queue,
- I2O_MAX_OUTBOUND_MSG_FRAMES * I2O_OUTBOUND_MSG_FRAME_SIZE *
- sizeof(u32))) {
- i2o_pci_free(c);
- return -ENOMEM;
- }
-
- pci_set_drvdata(pdev, c);
-
- return 0;
-}
-
-/**
- * i2o_pci_interrupt - Interrupt handler for I2O controller
- * @irq: interrupt line
- * @dev_id: pointer to the I2O controller
- *
- * Handle an interrupt from a PCI based I2O controller. This turns out
- * to be rather simple. We keep the controller pointer in the cookie.
- */
-static irqreturn_t i2o_pci_interrupt(int irq, void *dev_id)
-{
- struct i2o_controller *c = dev_id;
- u32 m;
- irqreturn_t rc = IRQ_NONE;
-
- while (readl(c->irq_status) & I2O_IRQ_OUTBOUND_POST) {
- m = readl(c->out_port);
- if (m == I2O_QUEUE_EMPTY) {
- /*
- * Old 960 steppings had a bug in the I2O unit that
- * caused the queue to appear empty when it wasn't.
- */
- m = readl(c->out_port);
- if (unlikely(m == I2O_QUEUE_EMPTY))
- break;
- }
-
- /* dispatch it */
- if (i2o_driver_dispatch(c, m))
- /* flush it if result != 0 */
- i2o_flush_reply(c, m);
-
- rc = IRQ_HANDLED;
- }
-
- return rc;
-}
-
-/**
- * i2o_pci_irq_enable - Allocate interrupt for I2O controller
- * @c: i2o_controller that the request is for
- *
- * Allocate an interrupt for the I2O controller, and activate interrupts
- * on the I2O controller.
- *
- * Returns 0 on success or negative error code on failure.
- */
-static int i2o_pci_irq_enable(struct i2o_controller *c)
-{
- struct pci_dev *pdev = c->pdev;
- int rc;
-
- writel(0xffffffff, c->irq_mask);
-
- if (pdev->irq) {
- rc = request_irq(pdev->irq, i2o_pci_interrupt, IRQF_SHARED,
- c->name, c);
- if (rc < 0) {
- printk(KERN_ERR "%s: unable to allocate interrupt %d."
- "\n", c->name, pdev->irq);
- return rc;
- }
- }
-
- writel(0x00000000, c->irq_mask);
-
- printk(KERN_INFO "%s: Installed at IRQ %d\n", c->name, pdev->irq);
-
- return 0;
-}
-
-/**
- * i2o_pci_irq_disable - Free interrupt for I2O controller
- * @c: I2O controller
- *
- * Disable interrupts in I2O controller and then free interrupt.
- */
-static void i2o_pci_irq_disable(struct i2o_controller *c)
-{
- writel(0xffffffff, c->irq_mask);
-
- if (c->pdev->irq > 0)
- free_irq(c->pdev->irq, c);
-}
-
-/**
- * i2o_pci_probe - Probe the PCI device for an I2O controller
- * @pdev: PCI device to test
- * @id: id which matched with the PCI device id table
- *
- * Probe the PCI device for any device which is a memory of the
- * Intelligent, I2O class or an Adaptec Zero Channel Controller. We
- * attempt to set up each such device and register it with the core.
- *
- * Returns 0 on success or negative error code on failure.
- */
-static int i2o_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
-{
- struct i2o_controller *c;
- int rc;
- struct pci_dev *i960 = NULL;
-
- printk(KERN_INFO "i2o: Checking for PCI I2O controllers...\n");
-
- if ((pdev->class & 0xff) > 1) {
- printk(KERN_WARNING "i2o: %s does not support I2O 1.5 "
- "(skipping).\n", pci_name(pdev));
- return -ENODEV;
- }
-
- rc = pci_enable_device(pdev);
- if (rc) {
- printk(KERN_WARNING "i2o: couldn't enable device %s\n",
- pci_name(pdev));
- return rc;
- }
-
- if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
- printk(KERN_WARNING "i2o: no suitable DMA found for %s\n",
- pci_name(pdev));
- rc = -ENODEV;
- goto disable;
- }
-
- pci_set_master(pdev);
-
- c = i2o_iop_alloc();
- if (IS_ERR(c)) {
- printk(KERN_ERR "i2o: couldn't allocate memory for %s\n",
- pci_name(pdev));
- rc = PTR_ERR(c);
- goto disable;
- } else
- printk(KERN_INFO "%s: controller found (%s)\n", c->name,
- pci_name(pdev));
-
- c->pdev = pdev;
- c->device.parent = &pdev->dev;
-
- /* Cards that fall apart if you hit them with large I/O loads... */
- if (pdev->vendor == PCI_VENDOR_ID_NCR && pdev->device == 0x0630) {
- c->short_req = 1;
- printk(KERN_INFO "%s: Symbios FC920 workarounds activated.\n",
- c->name);
- }
-
- if (pdev->subsystem_vendor == PCI_VENDOR_ID_PROMISE) {
- /*
- * Expose the ship behind i960 for initialization, or it will
- * failed
- */
- i960 = pci_get_slot(c->pdev->bus,
- PCI_DEVFN(PCI_SLOT(c->pdev->devfn), 0));
-
- if (i960) {
- pci_write_config_word(i960, 0x42, 0);
- pci_dev_put(i960);
- }
-
- c->promise = 1;
- c->limit_sectors = 1;
- }
-
- if (pdev->subsystem_vendor == PCI_VENDOR_ID_DPT)
- c->adaptec = 1;
-
- /* Cards that go bananas if you quiesce them before you reset them. */
- if (pdev->vendor == PCI_VENDOR_ID_DPT) {
- c->no_quiesce = 1;
- if (pdev->device == 0xa511)
- c->raptor = 1;
-
- if (pdev->subsystem_device == 0xc05a) {
- c->limit_sectors = 1;
- printk(KERN_INFO
- "%s: limit sectors per request to %d\n", c->name,
- I2O_MAX_SECTORS_LIMITED);
- }
-#ifdef CONFIG_I2O_EXT_ADAPTEC_DMA64
- if (sizeof(dma_addr_t) > 4) {
- if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
- printk(KERN_INFO "%s: 64-bit DMA unavailable\n",
- c->name);
- else {
- c->pae_support = 1;
- printk(KERN_INFO "%s: using 64-bit DMA\n",
- c->name);
- }
- }
-#endif
- }
-
- rc = i2o_pci_alloc(c);
- if (rc) {
- printk(KERN_ERR "%s: DMA / IO allocation for I2O controller "
- "failed\n", c->name);
- goto free_controller;
- }
-
- if (i2o_pci_irq_enable(c)) {
- printk(KERN_ERR "%s: unable to enable interrupts for I2O "
- "controller\n", c->name);
- goto free_pci;
- }
-
- rc = i2o_iop_add(c);
- if (rc)
- goto uninstall;
-
- if (i960)
- pci_write_config_word(i960, 0x42, 0x03ff);
-
- return 0;
-
- uninstall:
- i2o_pci_irq_disable(c);
-
- free_pci:
- i2o_pci_free(c);
-
- free_controller:
- i2o_iop_free(c);
-
- disable:
- pci_disable_device(pdev);
-
- return rc;
-}
-
-/**
- * i2o_pci_remove - Removes a I2O controller from the system
- * @pdev: I2O controller which should be removed
- *
- * Reset the I2O controller, disable interrupts and remove all allocated
- * resources.
- */
-static void i2o_pci_remove(struct pci_dev *pdev)
-{
- struct i2o_controller *c;
- c = pci_get_drvdata(pdev);
-
- i2o_iop_remove(c);
- i2o_pci_irq_disable(c);
- i2o_pci_free(c);
-
- pci_disable_device(pdev);
-
- printk(KERN_INFO "%s: Controller removed.\n", c->name);
-
- put_device(&c->device);
-};
-
-/* PCI driver for I2O controller */
-static struct pci_driver i2o_pci_driver = {
- .name = "PCI_I2O",
- .id_table = i2o_pci_ids,
- .probe = i2o_pci_probe,
- .remove = i2o_pci_remove,
-};
-
-/**
- * i2o_pci_init - registers I2O PCI driver in PCI subsystem
- *
- * Returns > 0 on success or negative error code on failure.
- */
-int __init i2o_pci_init(void)
-{
- return pci_register_driver(&i2o_pci_driver);
-};
-
-/**
- * i2o_pci_exit - unregisters I2O PCI driver from PCI subsystem
- */
-void __exit i2o_pci_exit(void)
-{
- pci_unregister_driver(&i2o_pci_driver);
-};
-
-MODULE_DEVICE_TABLE(pci, i2o_pci_ids);
Code Review / kvmfornfv.git / blobdiff