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path: root/drivers/parisc/sba_iommu.c
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Diffstat (limited to 'drivers/parisc/sba_iommu.c')
-rw-r--r--drivers/parisc/sba_iommu.c45
1 files changed, 32 insertions, 13 deletions
diff --git a/drivers/parisc/sba_iommu.c b/drivers/parisc/sba_iommu.c
index 42b32ff2fca..278f325021e 100644
--- a/drivers/parisc/sba_iommu.c
+++ b/drivers/parisc/sba_iommu.c
@@ -178,6 +178,11 @@ extern struct proc_dir_entry * proc_mckinley_root;
#define ROPE6_CTL 0x230
#define ROPE7_CTL 0x238
+#define IOC_ROPE0_CFG 0x500 /* pluto only */
+#define IOC_ROPE_AO 0x10 /* Allow "Relaxed Ordering" */
+
+
+
#define HF_ENABLE 0x40
@@ -1759,19 +1764,33 @@ printk("sba_hw_init(): mem_boot 0x%x 0x%x 0x%x 0x%x\n", PAGE0->mem_boot.hpa,
sba_dev->num_ioc = num_ioc;
for (i = 0; i < num_ioc; i++) {
- /*
- ** Make sure the box crashes if we get any errors on a rope.
- */
- WRITE_REG(HF_ENABLE, sba_dev->ioc[i].ioc_hpa + ROPE0_CTL);
- WRITE_REG(HF_ENABLE, sba_dev->ioc[i].ioc_hpa + ROPE1_CTL);
- WRITE_REG(HF_ENABLE, sba_dev->ioc[i].ioc_hpa + ROPE2_CTL);
- WRITE_REG(HF_ENABLE, sba_dev->ioc[i].ioc_hpa + ROPE3_CTL);
- WRITE_REG(HF_ENABLE, sba_dev->ioc[i].ioc_hpa + ROPE4_CTL);
- WRITE_REG(HF_ENABLE, sba_dev->ioc[i].ioc_hpa + ROPE5_CTL);
- WRITE_REG(HF_ENABLE, sba_dev->ioc[i].ioc_hpa + ROPE6_CTL);
- WRITE_REG(HF_ENABLE, sba_dev->ioc[i].ioc_hpa + ROPE7_CTL);
-
- /* flush out the writes */
+ unsigned long ioc_hpa = sba_dev->ioc[i].ioc_hpa;
+ unsigned int j;
+
+ for (j=0; j < sizeof(u64) * ROPES_PER_IOC; j+=sizeof(u64)) {
+
+ /*
+ * Clear ROPE(N)_CONFIG AO bit.
+ * Disables "NT Ordering" (~= !"Relaxed Ordering")
+ * Overrides bit 1 in DMA Hint Sets.
+ * Improves netperf UDP_STREAM by ~10% for bcm5701.
+ */
+ if (IS_PLUTO(sba_dev->iodc)) {
+ unsigned long rope_cfg, cfg_val;
+
+ rope_cfg = ioc_hpa + IOC_ROPE0_CFG + j;
+ cfg_val = READ_REG(rope_cfg);
+ cfg_val &= ~IOC_ROPE_AO;
+ WRITE_REG(cfg_val, rope_cfg);
+ }
+
+ /*
+ ** Make sure the box crashes on rope errors.
+ */
+ WRITE_REG(HF_ENABLE, ioc_hpa + ROPE0_CTL + j);
+ }
+
+ /* flush out the last writes */
READ_REG(sba_dev->ioc[i].ioc_hpa + ROPE7_CTL);
DBG_INIT(" ioc[%d] ROPE_CFG 0x%Lx ROPE_DBG 0x%Lx\n",