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path: root/drivers/message/i2o/pci.c
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Diffstat (limited to 'drivers/message/i2o/pci.c')
-rw-r--r--drivers/message/i2o/pci.c305
1 files changed, 137 insertions, 168 deletions
diff --git a/drivers/message/i2o/pci.c b/drivers/message/i2o/pci.c
index e772752f056..0f9f3e1a2b6 100644
--- a/drivers/message/i2o/pci.c
+++ b/drivers/message/i2o/pci.c
@@ -15,11 +15,11 @@
*
* Fixes/additions:
* Philipp Rumpf
- * Juha Sievänen <Juha.Sievanen@cs.Helsinki.FI>
- * Auvo Häkkinen <Auvo.Hakkinen@cs.Helsinki.FI>
+ * 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>:
+ * Alan Cox <alan@lxorguk.ukuu.org.uk>:
* Ported to Linux 2.5.
* Markus Lidel <Markus.Lidel@shadowconnect.com>:
* Minor fixes for 2.6.
@@ -29,54 +29,23 @@
#include <linux/pci.h>
#include <linux/interrupt.h>
+#include <linux/slab.h>
#include <linux/i2o.h>
+#include <linux/module.h>
+#include "core.h"
-#ifdef CONFIG_MTRR
-#include <asm/mtrr.h>
-#endif // CONFIG_MTRR
-
-/* 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,
- struct i2o_message *);
+#define OSM_DESCRIPTION "I2O-subsystem"
/* PCI device id table for all I2O controllers */
-static struct pci_device_id __devinitdata i2o_pci_ids[] = {
+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_dma_realloc - Realloc DMA memory
- * @dev: struct device pointer to the PCI device of the I2O controller
- * @addr: pointer to a i2o_dma struct DMA buffer
- * @len: new length of memory
- * @gfp_mask: GFP mask
- *
- * If there was something allocated in the addr, free it first. If len > 0
- * than try to allocate it and write the addresses back to the addr
- * structure. If len == 0 set the virtual address to NULL.
- *
- * Returns the 0 on success or negative error code on failure.
- */
-int i2o_dma_realloc(struct device *dev, struct i2o_dma *addr, size_t len,
- unsigned int gfp_mask)
-{
- i2o_dma_free(dev, addr);
-
- if (len)
- return i2o_dma_alloc(dev, addr, len, gfp_mask);
-
- return 0;
-};
-
-/**
* i2o_pci_free - Frees the DMA memory for the I2O controller
* @c: I2O controller to free
*
@@ -91,24 +60,18 @@ static void i2o_pci_free(struct i2o_controller *c)
i2o_dma_free(dev, &c->out_queue);
i2o_dma_free(dev, &c->status_block);
- if (c->lct)
- kfree(c->lct);
+ kfree(c->lct);
i2o_dma_free(dev, &c->dlct);
i2o_dma_free(dev, &c->hrt);
i2o_dma_free(dev, &c->status);
-#ifdef CONFIG_MTRR
- if (c->mtrr_reg0 >= 0)
- mtrr_del(c->mtrr_reg0, 0, 0);
- if (c->mtrr_reg1 >= 0)
- mtrr_del(c->mtrr_reg1, 0, 0);
-#endif
-
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);
}
/**
@@ -121,12 +84,17 @@ static void i2o_pci_free(struct i2o_controller *c)
*
* Returns 0 on success or negative error code on failure.
*/
-static int __devinit i2o_pci_alloc(struct i2o_controller *c)
+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)) {
@@ -178,14 +146,16 @@ static int __devinit i2o_pci_alloc(struct i2o_controller *c)
c->name, (unsigned long)c->base.phys,
(unsigned long)c->base.len);
- c->base.virt = ioremap(c->base.phys, 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(c->in_queue.phys, c->in_queue.len);
+ 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);
@@ -195,66 +165,52 @@ static int __devinit i2o_pci_alloc(struct i2o_controller *c)
} else
c->in_queue = c->base;
- c->irq_mask = c->base.virt + 0x34;
- c->post_port = c->base.virt + 0x40;
- c->reply_port = c->base.virt + 0x44;
-
-#ifdef CONFIG_MTRR
- /* Enable Write Combining MTRR for IOP's memory region */
- c->mtrr_reg0 = mtrr_add(c->in_queue.phys, c->in_queue.len,
- MTRR_TYPE_WRCOMB, 1);
- c->mtrr_reg1 = -1;
-
- if (c->mtrr_reg0 < 0)
- printk(KERN_WARNING "%s: could not enable write combining "
- "MTRR\n", c->name);
- else
- printk(KERN_INFO "%s: using write combining MTRR\n", c->name);
-
- /*
- * If it is an INTEL i960 I/O processor then set the first 64K to
- * Uncacheable since the region contains the messaging unit which
- * shouldn't be cached.
- */
- if ((pdev->vendor == PCI_VENDOR_ID_INTEL ||
- pdev->vendor == PCI_VENDOR_ID_DPT) && !c->raptor) {
- printk(KERN_INFO "%s: MTRR workaround for Intel i960 processor"
- "\n", c->name);
- c->mtrr_reg1 = mtrr_add(c->base.phys, 0x10000,
- MTRR_TYPE_UNCACHABLE, 1);
-
- if (c->mtrr_reg1 < 0) {
- printk(KERN_WARNING "%s: Error in setting "
- "MTRR_TYPE_UNCACHABLE\n", c->name);
- mtrr_del(c->mtrr_reg0, c->in_queue.phys,
- c->in_queue.len);
- c->mtrr_reg0 = -1;
+ 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);
}
}
-#endif
- if (i2o_dma_alloc(dev, &c->status, 8, GFP_KERNEL)) {
+ if (i2o_dma_alloc(dev, &c->status, 8)) {
i2o_pci_free(c);
return -ENOMEM;
}
- if (i2o_dma_alloc(dev, &c->hrt, sizeof(i2o_hrt), GFP_KERNEL)) {
+ if (i2o_dma_alloc(dev, &c->hrt, sizeof(i2o_hrt))) {
i2o_pci_free(c);
return -ENOMEM;
}
- if (i2o_dma_alloc(dev, &c->dlct, 8192, GFP_KERNEL)) {
+ 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),
- GFP_KERNEL)) {
+ 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, MSG_POOL_SIZE, GFP_KERNEL)) {
+ 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;
}
@@ -268,63 +224,42 @@ static int __devinit i2o_pci_alloc(struct i2o_controller *c)
* 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)
+static irqreturn_t i2o_pci_interrupt(int irq, void *dev_id)
{
struct i2o_controller *c = dev_id;
- struct device *dev = &c->pdev->dev;
- struct i2o_message *m;
- u32 mv;
-
- /*
- * Old 960 steppings had a bug in the I2O unit that caused
- * the queue to appear empty when it wasn't.
- */
- mv = I2O_REPLY_READ32(c);
- if (mv == I2O_QUEUE_EMPTY) {
- mv = I2O_REPLY_READ32(c);
- if (unlikely(mv == I2O_QUEUE_EMPTY)) {
- return IRQ_NONE;
- } else
- pr_debug("%s: 960 bug detected\n", c->name);
- }
-
- while (mv != I2O_QUEUE_EMPTY) {
- /*
- * Map the message from the page frame map to kernel virtual.
- * Because bus_to_virt is deprecated, we have calculate the
- * location by ourself!
- */
- m = i2o_msg_out_to_virt(c, mv);
-
- /*
- * Ensure this message is seen coherently but cachably by
- * the processor
- */
- dma_sync_single_for_cpu(dev, mv, MSG_FRAME_SIZE * 4,
- PCI_DMA_FROMDEVICE);
+ 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, mv, m))
+ if (i2o_driver_dispatch(c, m))
/* flush it if result != 0 */
- i2o_flush_reply(c, mv);
+ i2o_flush_reply(c, m);
- /*
- * That 960 bug again...
- */
- mv = I2O_REPLY_READ32(c);
- if (mv == I2O_QUEUE_EMPTY)
- mv = I2O_REPLY_READ32(c);
+ rc = IRQ_HANDLED;
}
- return 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.
@@ -336,10 +271,10 @@ static int i2o_pci_irq_enable(struct i2o_controller *c)
struct pci_dev *pdev = c->pdev;
int rc;
- I2O_IRQ_WRITE32(c, 0xffffffff);
+ writel(0xffffffff, c->irq_mask);
if (pdev->irq) {
- rc = request_irq(pdev->irq, i2o_pci_interrupt, SA_SHIRQ,
+ 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."
@@ -348,7 +283,7 @@ static int i2o_pci_irq_enable(struct i2o_controller *c)
}
}
- I2O_IRQ_WRITE32(c, 0x00000000);
+ writel(0x00000000, c->irq_mask);
printk(KERN_INFO "%s: Installed at IRQ %d\n", c->name, pdev->irq);
@@ -363,7 +298,7 @@ static int i2o_pci_irq_enable(struct i2o_controller *c)
*/
static void i2o_pci_irq_disable(struct i2o_controller *c)
{
- I2O_IRQ_WRITE32(c, 0xffffffff);
+ writel(0xffffffff, c->irq_mask);
if (c->pdev->irq > 0)
free_irq(c->pdev->irq, c);
@@ -371,7 +306,7 @@ static void i2o_pci_irq_disable(struct i2o_controller *c)
/**
* i2o_pci_probe - Probe the PCI device for an I2O controller
- * @dev: PCI device to test
+ * @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
@@ -380,33 +315,29 @@ static void i2o_pci_irq_disable(struct i2o_controller *c)
*
* 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)
+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: I2O controller found but does not "
- "support I2O 1.5 (skipping).\n");
+ 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: I2O controller found but could not be"
- " enabled.\n");
+ printk(KERN_WARNING "i2o: couldn't enable device %s\n",
+ pci_name(pdev));
return rc;
}
- printk(KERN_INFO "i2o: I2O controller found on bus %d at %d.\n",
- pdev->bus->number, pdev->devfn);
-
- if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
- printk(KERN_WARNING "i2o: I2O controller on bus %d at %d: No "
- "suitable DMA available!\n", pdev->bus->number,
- pdev->devfn);
+ 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;
}
@@ -415,14 +346,16 @@ static int __devinit i2o_pci_probe(struct pci_dev *pdev,
c = i2o_iop_alloc();
if (IS_ERR(c)) {
- printk(KERN_ERR "i2o: memory for I2O controller could not be "
- "allocated\n");
+ 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 = pdev->dev;
+ 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) {
@@ -432,21 +365,54 @@ static int __devinit i2o_pci_probe(struct pci_dev *pdev,
}
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;
- printk(KERN_INFO "%s: Promise workarounds activated.\n",
- c->name);
+ 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
}
if ((rc = i2o_pci_alloc(c))) {
printk(KERN_ERR "%s: DMA / IO allocation for I2O controller "
- " failed\n", c->name);
+ "failed\n", c->name);
goto free_controller;
}
@@ -459,6 +425,9 @@ static int __devinit i2o_pci_probe(struct pci_dev *pdev,
if ((rc = i2o_iop_add(c)))
goto uninstall;
+ if (i960)
+ pci_write_config_word(i960, 0x42, 0x03ff);
+
return 0;
uninstall:
@@ -478,12 +447,12 @@ static int __devinit i2o_pci_probe(struct pci_dev *pdev,
/**
* i2o_pci_remove - Removes a I2O controller from the system
- * pdev: I2O controller which should be removed
+ * @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)
+static void i2o_pci_remove(struct pci_dev *pdev)
{
struct i2o_controller *c;
c = pci_get_drvdata(pdev);
@@ -492,18 +461,19 @@ static void __devexit i2o_pci_remove(struct pci_dev *pdev)
i2o_pci_irq_disable(c);
i2o_pci_free(c);
+ pci_disable_device(pdev);
+
printk(KERN_INFO "%s: Controller removed.\n", c->name);
- i2o_iop_free(c);
- pci_disable_device(pdev);
+ put_device(&c->device);
};
/* PCI driver for I2O controller */
static struct pci_driver i2o_pci_driver = {
- .name = "I2O controller",
+ .name = "PCI_I2O",
.id_table = i2o_pci_ids,
.probe = i2o_pci_probe,
- .remove = __devexit_p(i2o_pci_remove),
+ .remove = i2o_pci_remove,
};
/**
@@ -524,5 +494,4 @@ void __exit i2o_pci_exit(void)
pci_unregister_driver(&i2o_pci_driver);
};
-EXPORT_SYMBOL(i2o_dma_realloc);
MODULE_DEVICE_TABLE(pci, i2o_pci_ids);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-11 19:59:18 +0000