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author | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2006-06-10 13:47:26 -0500 |
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committer | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2006-06-10 13:47:26 -0500 |
commit | f0cd91a68acdc9b49d7f6738b514a426da627649 (patch) | |
tree | 8ad73564015794197583b094217ae0a71e71e753 /drivers/parisc/sba_iommu.c | |
parent | 60eef25701d25e99c991dd0f4a9f3832a0c3ad3e (diff) | |
parent | 128e6ced247cda88f96fa9f2e4ba8b2c4a681560 (diff) | |
download | op-kernel-dev-f0cd91a68acdc9b49d7f6738b514a426da627649.zip op-kernel-dev-f0cd91a68acdc9b49d7f6738b514a426da627649.tar.gz |
Merge ../linux-2.6
Diffstat (limited to 'drivers/parisc/sba_iommu.c')
-rw-r--r-- | drivers/parisc/sba_iommu.c | 45 |
1 files changed, 32 insertions, 13 deletions
diff --git a/drivers/parisc/sba_iommu.c b/drivers/parisc/sba_iommu.c index 42b32ff..278f325 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", |