[PATCH] I2O: new sysfs attributes and Adaptec specific block device access and 64-bit DMA support

Changes:
 - Added Bus-OSM which could be used by user space programs to reset a
   channel on the controller
 - Make ioctl's in Config-OSM obsolete in prefer for sysfs attributes and
   move those to its own file
 - Added sysfs attribute for firmware read and write access for I2O
   controllers
 - Added special handling of firmware read and write access for Adaptec
   controllers
 - Added vendor id and product id as sysfs-attribute to Executive classes
 - Added automatic notification of LCT change handling to Exec-OSM
 - Added flushing function to Block-OSM for later barrier implementation
 - Use PRIVATE messages for Block access on Adaptec controllers, which are
   faster then BLOCK class access
 - Cleaned up support for Promise controller
 - New messages are now detected using the IRQ status register as
   suggested by the I2O spec
 - Added i2o_dma_high() and i2o_dma_low() functions
 - Added facility for SG tablesize calculation when using 32-bit and
   64-bit DMA addresses
 - Added i2o_dma_map_single() and i2o_dma_map_sg() which could build the
   SG list for 32-bit as well as 64-bit DMA addresses

Signed-off-by: Markus Lidel <Markus.Lidel@shadowconnect.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 19 insertions, 48 deletions

diff --git a/drivers/message/i2o/pci.c b/drivers/message/i2o/pci.c
index f33fd81f77a..a499af096a6 100644
--- a/drivers/message/i2o/pci.c
+++ b/drivers/message/i2o/pci.c
@@ -50,30 +50,6 @@ static struct pci_device_id __devinitdata i2o_pci_ids[] = {
 };
 
 /**
- *      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
  *
@@ -185,6 +161,7 @@ static int __devinit i2o_pci_alloc(struct i2o_controller *c)
         } 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;
@@ -232,36 +209,30 @@ static int __devinit i2o_pci_alloc(struct i2o_controller *c)
 static irqreturn_t i2o_pci_interrupt(int irq, void *dev_id, struct pt_regs *r)
 {
         struct i2o_controller *c = dev_id;
-        struct device *dev = &c->pdev->dev;
-        u32 mv = readl(c->out_port);
-
-        /*
-         * Old 960 steppings had a bug in the I2O unit that caused
-         * the queue to appear empty when it wasn't.
-         */
-        if (mv == I2O_QUEUE_EMPTY) {
-                mv = readl(c->out_port);
-                if (unlikely(mv == I2O_QUEUE_EMPTY))
-                        return IRQ_NONE;
-                else
-                        pr_debug("%s: 960 bug detected\n", c->name);
-        }
+        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;
+                }
 
-        while (mv != I2O_QUEUE_EMPTY) {
                 /* dispatch it */
-                if (i2o_driver_dispatch(c, mv))
+                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 = readl(c->out_port);
-                if (mv == I2O_QUEUE_EMPTY)
-                        mv = readl(c->out_port);
+                rc = IRQ_HANDLED;
         }
 
-        return IRQ_HANDLED;
+        return rc;
 }
 
 /**