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-rw-r--r--arch/sparc64/kernel/pci_schizo.c51
-rw-r--r--include/asm-sparc64/pbm.h3
2 files changed, 54 insertions, 0 deletions
diff --git a/arch/sparc64/kernel/pci_schizo.c b/arch/sparc64/kernel/pci_schizo.c
index 5753175b94e..68b1a63a178 100644
--- a/arch/sparc64/kernel/pci_schizo.c
+++ b/arch/sparc64/kernel/pci_schizo.c
@@ -15,6 +15,7 @@
#include <asm/iommu.h>
#include <asm/irq.h>
#include <asm/upa.h>
+#include <asm/pstate.h>
#include "pci_impl.h"
#include "iommu_common.h"
@@ -326,6 +327,44 @@ static int __init schizo_ino_to_pil(struct pci_dev *pdev, unsigned int ino)
return ret;
}
+static void tomatillo_wsync_handler(struct ino_bucket *bucket, void *_arg1, void *_arg2)
+{
+ unsigned long sync_reg = (unsigned long) _arg2;
+ u64 mask = 1 << (__irq_ino(__irq(bucket)) & IMAP_INO);
+ u64 val;
+ int limit;
+
+ schizo_write(sync_reg, mask);
+
+ limit = 100000;
+ val = 0;
+ while (--limit) {
+ val = schizo_read(sync_reg);
+ if (!(val & mask))
+ break;
+ }
+ if (limit <= 0) {
+ printk("tomatillo_wsync_handler: DMA won't sync [%lx:%lx]\n",
+ val, mask);
+ }
+
+ if (_arg1) {
+ static unsigned char cacheline[64]
+ __attribute__ ((aligned (64)));
+
+ __asm__ __volatile__("rd %%fprs, %0\n\t"
+ "or %0, %4, %1\n\t"
+ "wr %1, 0x0, %%fprs\n\t"
+ "stda %%f0, [%5] %6\n\t"
+ "wr %0, 0x0, %%fprs\n\t"
+ "membar #Sync"
+ : "=&r" (mask), "=&r" (val)
+ : "0" (mask), "1" (val),
+ "i" (FPRS_FEF), "r" (&cacheline[0]),
+ "i" (ASI_BLK_COMMIT_P));
+ }
+}
+
static unsigned int schizo_irq_build(struct pci_pbm_info *pbm,
struct pci_dev *pdev,
unsigned int ino)
@@ -369,6 +408,15 @@ static unsigned int schizo_irq_build(struct pci_pbm_info *pbm,
bucket = __bucket(build_irq(pil, ign_fixup, iclr, imap));
bucket->flags |= IBF_PCI;
+ if (pdev && pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO) {
+ struct irq_desc *p = bucket->irq_info;
+
+ p->pre_handler = tomatillo_wsync_handler;
+ p->pre_handler_arg1 = ((pbm->chip_version <= 4) ?
+ (void *) 1 : (void *) 0);
+ p->pre_handler_arg2 = (void *) pbm->sync_reg;
+ }
+
return __irq(bucket);
}
@@ -2015,6 +2063,9 @@ static void __init schizo_pbm_init(struct pci_controller_info *p,
pbm->pbm_regs = pr_regs[0].phys_addr;
pbm->controller_regs = pr_regs[1].phys_addr - 0x10000UL;
+ if (chip_type == PBM_CHIP_TYPE_TOMATILLO)
+ pbm->sync_reg = pr_regs[3].phys_addr + 0x1a18UL;
+
sprintf(pbm->name,
(chip_type == PBM_CHIP_TYPE_TOMATILLO ?
"TOMATILLO%d PBM%c" :
diff --git a/include/asm-sparc64/pbm.h b/include/asm-sparc64/pbm.h
index 4c15610a2ba..38bbbccb406 100644
--- a/include/asm-sparc64/pbm.h
+++ b/include/asm-sparc64/pbm.h
@@ -145,6 +145,9 @@ struct pci_pbm_info {
/* Physical address base of PBM registers. */
unsigned long pbm_regs;
+ /* Physical address of DMA sync register, if any. */
+ unsigned long sync_reg;
+
/* Opaque 32-bit system bus Port ID. */
u32 portid;