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authorVenki Pallipadi <venkatesh.pallipadi@intel.com>2008-10-23 03:34:52 +0400
committerLen Brown <len.brown@intel.com>2008-10-24 20:54:18 +0400
commit3ad0b02e4c1d5feba44b8ff48dccd1ba61a826b0 (patch)
treeb674d7e805f9f53b2550f81009b5a860e5a4fc47 /drivers
parent27471fdb32e77ecb92f09d4ac5757785b4dc33bc (diff)
downloadlinux-3ad0b02e4c1d5feba44b8ff48dccd1ba61a826b0.tar.xz
i7300_idle: Disable ioat channel only on platforms where ile driver can load
Based on input from Andi Kleen: share the platform detection code with ioat_dma and disable the channel in dma engine only for specific platforms. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/dma/ioat_dma.c5
-rw-r--r--drivers/idle/i7300_idle.c72
2 files changed, 6 insertions, 71 deletions
diff --git a/drivers/dma/ioat_dma.c b/drivers/dma/ioat_dma.c
index f8396cafa05f..fd1631d0a795 100644
--- a/drivers/dma/ioat_dma.c
+++ b/drivers/dma/ioat_dma.c
@@ -33,6 +33,7 @@
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/workqueue.h>
+#include <linux/i7300_idle.h>
#include "ioatdma.h"
#include "ioatdma_registers.h"
#include "ioatdma_hw.h"
@@ -172,7 +173,9 @@ static int ioat_dma_enumerate_channels(struct ioatdma_device *device)
xfercap = (xfercap_scale == 0 ? -1 : (1UL << xfercap_scale));
#if CONFIG_I7300_IDLE_IOAT_CHANNEL
- device->common.chancnt--;
+ if (i7300_idle_platform_probe(NULL, NULL) == 0) {
+ device->common.chancnt--;
+ }
#endif
for (i = 0; i < device->common.chancnt; i++) {
ioat_chan = kzalloc(sizeof(*ioat_chan), GFP_KERNEL);
diff --git a/drivers/idle/i7300_idle.c b/drivers/idle/i7300_idle.c
index 59d1bbc3cd3c..79d47f284cd6 100644
--- a/drivers/idle/i7300_idle.c
+++ b/drivers/idle/i7300_idle.c
@@ -25,6 +25,7 @@
#include <linux/delay.h>
#include <linux/debugfs.h>
#include <linux/stop_machine.h>
+#include <linux/i7300_idle.h>
#include <asm/idle.h>
@@ -505,77 +506,8 @@ static struct notifier_block i7300_idle_nb = {
.notifier_call = i7300_idle_notifier,
};
-/*
- * I/O AT controls (PCI bus 0 device 8 function 0)
- * DIMM controls (PCI bus 0 device 16 function 1)
- */
-#define IOAT_BUS 0
-#define IOAT_DEVFN PCI_DEVFN(8, 0)
-#define MEMCTL_BUS 0
-#define MEMCTL_DEVFN PCI_DEVFN(16, 1)
-
-struct fbd_ioat {
- unsigned int vendor;
- unsigned int ioat_dev;
-};
-
-/*
- * The i5000 chip-set has the same hooks as the i7300
- * but support is disabled by default because this driver
- * has not been validated on that platform.
- */
-#define SUPPORT_I5000 0
-
-static const struct fbd_ioat fbd_ioat_list[] = {
- {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_CNB},
-#if SUPPORT_I5000
- {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT},
-#endif
- {0, 0}
-};
-
-/* table of devices that work with this driver */
-static const struct pci_device_id pci_tbl[] = {
- { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_FBD_CNB) },
-#if SUPPORT_I5000
- { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5000_ERR) },
-#endif
- { } /* Terminating entry */
-};
-
MODULE_DEVICE_TABLE(pci, pci_tbl);
-/* Check for known platforms with I/O-AT */
-static int __init i7300_idle_platform_probe(void)
-{
- int i;
-
- fbd_dev = pci_get_bus_and_slot(MEMCTL_BUS, MEMCTL_DEVFN);
- if (!fbd_dev)
- return -ENODEV;
-
- for (i = 0; pci_tbl[i].vendor != 0; i++) {
- if (fbd_dev->vendor == pci_tbl[i].vendor &&
- fbd_dev->device == pci_tbl[i].device) {
- break;
- }
- }
- if (pci_tbl[i].vendor == 0)
- return -ENODEV;
-
- ioat_dev = pci_get_bus_and_slot(IOAT_BUS, IOAT_DEVFN);
- if (!ioat_dev)
- return -ENODEV;
-
- for (i = 0; fbd_ioat_list[i].vendor != 0; i++) {
- if (ioat_dev->vendor == fbd_ioat_list[i].vendor &&
- ioat_dev->device == fbd_ioat_list[i].ioat_dev) {
- return 0;
- }
- }
- return -ENODEV;
-}
-
int stats_open_generic(struct inode *inode, struct file *fp)
{
fp->private_data = inode->i_private;
@@ -617,7 +549,7 @@ static int __init i7300_idle_init(void)
cpus_clear(idle_cpumask);
total_us = 0;
- if (i7300_idle_platform_probe())
+ if (i7300_idle_platform_probe(&fbd_dev, &ioat_dev))
return -ENODEV;
if (i7300_idle_thrt_save())