| /* |
| * 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@redhat.com>: |
| * 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/i2o.h> |
| |
| /* Module internal functions from other sources */ |
| extern struct i2o_controller *i2o_iop_alloc(void); |
| extern void i2o_iop_free(struct i2o_controller *); |
| |
| extern int i2o_iop_add(struct i2o_controller *); |
| extern void i2o_iop_remove(struct i2o_controller *); |
| |
| extern int i2o_driver_dispatch(struct i2o_controller *, u32); |
| |
| /* PCI device id table for all I2O controllers */ |
| static struct pci_device_id __devinitdata 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); |
| } |
| |
| /** |
| * 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 __devinit i2o_pci_alloc(struct i2o_controller *c) |
| { |
| struct pci_dev *pdev = c->pdev; |
| struct device *dev = &pdev->dev; |
| int i; |
| |
| 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); |
| 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; |
| |
| if (i2o_dma_alloc(dev, &c->status, 8, GFP_KERNEL)) { |
| i2o_pci_free(c); |
| return -ENOMEM; |
| } |
| |
| if (i2o_dma_alloc(dev, &c->hrt, sizeof(i2o_hrt), GFP_KERNEL)) { |
| i2o_pci_free(c); |
| return -ENOMEM; |
| } |
| |
| if (i2o_dma_alloc(dev, &c->dlct, 8192, GFP_KERNEL)) { |
| i2o_pci_free(c); |
| return -ENOMEM; |
| } |
| |
| if (i2o_dma_alloc(dev, &c->status_block, sizeof(i2o_status_block), |
| GFP_KERNEL)) { |
| i2o_pci_free(c); |
| return -ENOMEM; |
| } |
| |
| if (i2o_dma_alloc(dev, &c->out_queue, MSG_POOL_SIZE, GFP_KERNEL)) { |
| 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 |
| * @r: pointer to registers |
| * |
| * 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 pt_regs *r) |
| { |
| 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 |
| * |
| * 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; |
| |
| wmb(); |
| writel(0xffffffff, c->irq_mask); |
| wmb(); |
| |
| if (pdev->irq) { |
| rc = request_irq(pdev->irq, i2o_pci_interrupt, SA_SHIRQ, |
| 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); |
| wmb(); |
| |
| 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) |
| { |
| wmb(); |
| writel(0xffffffff, c->irq_mask); |
| wmb(); |
| |
| if (c->pdev->irq > 0) |
| free_irq(c->pdev->irq, c); |
| } |
| |
| /** |
| * i2o_pci_probe - Probe the PCI device for an I2O controller |
| * @dev: 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 __devinit 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; |
| } |
| |
| if ((rc = pci_enable_device(pdev))) { |
| printk(KERN_WARNING "i2o: couldn't enable device %s\n", |
| pci_name(pdev)); |
| return rc; |
| } |
| |
| if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) { |
| 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 = get_device(&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_find_slot(c->pdev->bus->number, |
| PCI_DEVFN(PCI_SLOT(c->pdev->devfn), 0)); |
| |
| if (i960) |
| pci_write_config_word(i960, 0x42, 0); |
| |
| c->promise = 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 ((rc = i2o_pci_alloc(c))) { |
| 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; |
| } |
| |
| if ((rc = i2o_iop_add(c))) |
| goto uninstall; |
| |
| if (i960) |
| pci_write_config_word(i960, 0x42, 0x03ff); |
| |
| get_device(&c->device); |
| |
| return 0; |
| |
| uninstall: |
| i2o_pci_irq_disable(c); |
| |
| free_pci: |
| i2o_pci_free(c); |
| |
| free_controller: |
| i2o_iop_free(c); |
| put_device(c->device.parent); |
| |
| 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 __devexit 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.parent); |
| 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 = __devexit_p(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); |
| }; |
| |
| EXPORT_SYMBOL(i2o_dma_realloc); |
| MODULE_DEVICE_TABLE(pci, i2o_pci_ids); |