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Diffstat (limited to 'arch/sparc/mm/iommu.c')
-rw-r--r--arch/sparc/mm/iommu.c102
1 files changed, 41 insertions, 61 deletions
diff --git a/arch/sparc/mm/iommu.c b/arch/sparc/mm/iommu.c
index 07fc6a65d9b..491511d37e3 100644
--- a/arch/sparc/mm/iommu.c
+++ b/arch/sparc/mm/iommu.c
@@ -27,6 +27,8 @@
#include <asm/iommu.h>
#include <asm/dma.h>
+#include "mm_32.h"
+
/*
* This can be sized dynamically, but we will do this
* only when we have a guidance about actual I/O pressures.
@@ -34,14 +36,9 @@
#define IOMMU_RNGE IOMMU_RNGE_256MB
#define IOMMU_START 0xF0000000
#define IOMMU_WINSIZE (256*1024*1024U)
-#define IOMMU_NPTES (IOMMU_WINSIZE/PAGE_SIZE) /* 64K PTEs, 265KB */
+#define IOMMU_NPTES (IOMMU_WINSIZE/PAGE_SIZE) /* 64K PTEs, 256KB */
#define IOMMU_ORDER 6 /* 4096 * (1<<6) */
-/* srmmu.c */
-extern int viking_mxcc_present;
-BTFIXUPDEF_CALL(void, flush_page_for_dma, unsigned long)
-#define flush_page_for_dma(page) BTFIXUP_CALL(flush_page_for_dma)(page)
-extern int flush_page_for_dma_global;
static int viking_flush;
/* viking.S */
extern void viking_flush_page(unsigned long page);
@@ -61,6 +58,8 @@ static void __init sbus_iommu_init(struct platform_device *op)
struct iommu_struct *iommu;
unsigned int impl, vers;
unsigned long *bitmap;
+ unsigned long control;
+ unsigned long base;
unsigned long tmp;
iommu = kmalloc(sizeof(struct iommu_struct), GFP_KERNEL);
@@ -75,12 +74,14 @@ static void __init sbus_iommu_init(struct platform_device *op)
prom_printf("Cannot map IOMMU registers\n");
prom_halt();
}
- impl = (iommu->regs->control & IOMMU_CTRL_IMPL) >> 28;
- vers = (iommu->regs->control & IOMMU_CTRL_VERS) >> 24;
- tmp = iommu->regs->control;
- tmp &= ~(IOMMU_CTRL_RNGE);
- tmp |= (IOMMU_RNGE_256MB | IOMMU_CTRL_ENAB);
- iommu->regs->control = tmp;
+
+ control = sbus_readl(&iommu->regs->control);
+ impl = (control & IOMMU_CTRL_IMPL) >> 28;
+ vers = (control & IOMMU_CTRL_VERS) >> 24;
+ control &= ~(IOMMU_CTRL_RNGE);
+ control |= (IOMMU_RNGE_256MB | IOMMU_CTRL_ENAB);
+ sbus_writel(control, &iommu->regs->control);
+
iommu_invalidate(iommu->regs);
iommu->start = IOMMU_START;
iommu->end = 0xffffffff;
@@ -92,8 +93,8 @@ static void __init sbus_iommu_init(struct platform_device *op)
it to us. */
tmp = __get_free_pages(GFP_KERNEL, IOMMU_ORDER);
if (!tmp) {
- prom_printf("Unable to allocate iommu table [0x%08x]\n",
- IOMMU_NPTES*sizeof(iopte_t));
+ prom_printf("Unable to allocate iommu table [0x%lx]\n",
+ IOMMU_NPTES * sizeof(iopte_t));
prom_halt();
}
iommu->page_table = (iopte_t *)tmp;
@@ -102,7 +103,9 @@ static void __init sbus_iommu_init(struct platform_device *op)
memset(iommu->page_table, 0, IOMMU_NPTES*sizeof(iopte_t));
flush_cache_all();
flush_tlb_all();
- iommu->regs->base = __pa((unsigned long) iommu->page_table) >> 4;
+
+ base = __pa((unsigned long)iommu->page_table) >> 4;
+ sbus_writel(base, &iommu->regs->base);
iommu_invalidate(iommu->regs);
bitmap = kmalloc(IOMMU_NPTES>>3, GFP_KERNEL);
@@ -143,7 +146,6 @@ static int __init iommu_init(void)
subsys_initcall(iommu_init);
-/* This begs to be btfixup-ed by srmmu. */
/* Flush the iotlb entries to ram. */
/* This could be better if we didn't have to flush whole pages. */
static void iommu_flush_iotlb(iopte_t *iopte, unsigned int niopte)
@@ -216,11 +218,6 @@ static u32 iommu_get_scsi_one(struct device *dev, char *vaddr, unsigned int len)
return busa + off;
}
-static __u32 iommu_get_scsi_one_noflush(struct device *dev, char *vaddr, unsigned long len)
-{
- return iommu_get_scsi_one(dev, vaddr, len);
-}
-
static __u32 iommu_get_scsi_one_gflush(struct device *dev, char *vaddr, unsigned long len)
{
flush_page_for_dma(0);
@@ -238,19 +235,6 @@ static __u32 iommu_get_scsi_one_pflush(struct device *dev, char *vaddr, unsigned
return iommu_get_scsi_one(dev, vaddr, len);
}
-static void iommu_get_scsi_sgl_noflush(struct device *dev, struct scatterlist *sg, int sz)
-{
- int n;
-
- while (sz != 0) {
- --sz;
- n = (sg->length + sg->offset + PAGE_SIZE-1) >> PAGE_SHIFT;
- sg->dma_address = iommu_get_one(dev, sg_page(sg), n) + sg->offset;
- sg->dma_length = sg->length;
- sg = sg_next(sg);
- }
-}
-
static void iommu_get_scsi_sgl_gflush(struct device *dev, struct scatterlist *sg, int sz)
{
int n;
@@ -426,40 +410,36 @@ static void iommu_unmap_dma_area(struct device *dev, unsigned long busa, int len
}
#endif
-static char *iommu_lockarea(char *vaddr, unsigned long len)
-{
- return vaddr;
-}
+static const struct sparc32_dma_ops iommu_dma_gflush_ops = {
+ .get_scsi_one = iommu_get_scsi_one_gflush,
+ .get_scsi_sgl = iommu_get_scsi_sgl_gflush,
+ .release_scsi_one = iommu_release_scsi_one,
+ .release_scsi_sgl = iommu_release_scsi_sgl,
+#ifdef CONFIG_SBUS
+ .map_dma_area = iommu_map_dma_area,
+ .unmap_dma_area = iommu_unmap_dma_area,
+#endif
+};
-static void iommu_unlockarea(char *vaddr, unsigned long len)
-{
-}
+static const struct sparc32_dma_ops iommu_dma_pflush_ops = {
+ .get_scsi_one = iommu_get_scsi_one_pflush,
+ .get_scsi_sgl = iommu_get_scsi_sgl_pflush,
+ .release_scsi_one = iommu_release_scsi_one,
+ .release_scsi_sgl = iommu_release_scsi_sgl,
+#ifdef CONFIG_SBUS
+ .map_dma_area = iommu_map_dma_area,
+ .unmap_dma_area = iommu_unmap_dma_area,
+#endif
+};
void __init ld_mmu_iommu(void)
{
- viking_flush = (BTFIXUPVAL_CALL(flush_page_for_dma) == (unsigned long)viking_flush_page);
- BTFIXUPSET_CALL(mmu_lockarea, iommu_lockarea, BTFIXUPCALL_RETO0);
- BTFIXUPSET_CALL(mmu_unlockarea, iommu_unlockarea, BTFIXUPCALL_NOP);
-
- if (!BTFIXUPVAL_CALL(flush_page_for_dma)) {
- /* IO coherent chip */
- BTFIXUPSET_CALL(mmu_get_scsi_one, iommu_get_scsi_one_noflush, BTFIXUPCALL_RETO0);
- BTFIXUPSET_CALL(mmu_get_scsi_sgl, iommu_get_scsi_sgl_noflush, BTFIXUPCALL_NORM);
- } else if (flush_page_for_dma_global) {
+ if (flush_page_for_dma_global) {
/* flush_page_for_dma flushes everything, no matter of what page is it */
- BTFIXUPSET_CALL(mmu_get_scsi_one, iommu_get_scsi_one_gflush, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(mmu_get_scsi_sgl, iommu_get_scsi_sgl_gflush, BTFIXUPCALL_NORM);
+ sparc32_dma_ops = &iommu_dma_gflush_ops;
} else {
- BTFIXUPSET_CALL(mmu_get_scsi_one, iommu_get_scsi_one_pflush, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(mmu_get_scsi_sgl, iommu_get_scsi_sgl_pflush, BTFIXUPCALL_NORM);
+ sparc32_dma_ops = &iommu_dma_pflush_ops;
}
- BTFIXUPSET_CALL(mmu_release_scsi_one, iommu_release_scsi_one, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(mmu_release_scsi_sgl, iommu_release_scsi_sgl, BTFIXUPCALL_NORM);
-
-#ifdef CONFIG_SBUS
- BTFIXUPSET_CALL(mmu_map_dma_area, iommu_map_dma_area, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(mmu_unmap_dma_area, iommu_unmap_dma_area, BTFIXUPCALL_NORM);
-#endif
if (viking_mxcc_present || srmmu_modtype == HyperSparc) {
dvma_prot = __pgprot(SRMMU_CACHE | SRMMU_ET_PTE | SRMMU_PRIV);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 13:16:44 +0000