Commit e0039348 authored by David S. Miller's avatar David S. Miller
Browse files

sparc32: Make IOMMU and IO-UNIT init work with device nodes. 



And stick the iommu archdata pointer into the generic OF device tree
of_device struct as well.

We still have to pass the sbus_bus object down into the routines so
that the SBUS bus objects get the iommu cookies set properly.  After
drivers get converted to being pure OF drivers, that can go away.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 334ae614

arch/sparc/include/asm/io-unit.h

+2 −0
Original line number Diff line number Diff line
@@ -59,4 +59,6 @@ extern __u32 iounit_map_dma_init(struct sbus_bus *, int); 
#define iounit_map_dma_finish(sbus, addr, len) mmu_release_scsi_one(addr, len, sbus)

extern __u32 iounit_map_dma_page(__u32, void *, struct sbus_bus *);



extern void iounit_init(struct sbus_bus *sbus);



#endif /* !(_SPARC_IO_UNIT_H) */

arch/sparc/include/asm/iommu_32.h

+2 −0
Original line number Diff line number Diff line
@@ -118,4 +118,6 @@ static inline void iommu_invalidate_page(struct iommu_regs *regs, unsigned long 
	regs->pageflush = (ba & PAGE_MASK);

}



extern void iommu_init(struct device_node *dp, struct sbus_bus *sbus);



#endif /* !(_SPARC_IOMMU_H) */

arch/sparc/kernel/ioport.c

+6 −11
Original line number Diff line number Diff line
@@ -46,6 +46,8 @@ 
#include <asm/page.h>

#include <asm/pgalloc.h>

#include <asm/dma.h>

#include <asm/iommu.h>

#include <asm/io-unit.h>



#define mmu_inval_dma_area(p, l)	/* Anton pulled it out for 2.4.0-xx */
@@ -515,18 +517,11 @@ void __init sbus_setup_iommu(struct sbus_bus *sbus, struct device_node *dp) 


	if (sparc_cpu_model != sun4d &&

	    parent != NULL &&

	    !strcmp(parent->name, "iommu")) {

		extern void iommu_init(int iommu_node, struct sbus_bus *sbus);

	    !strcmp(parent->name, "iommu"))

		iommu_init(parent, sbus);



		iommu_init(parent->node, sbus);

	}



	if (sparc_cpu_model == sun4d) {

		extern void iounit_init(int sbi_node, int iounit_node,

					struct sbus_bus *sbus);



		iounit_init(dp->node, parent->node, sbus);

	}

	if (sparc_cpu_model == sun4d)

		iounit_init(sbus);

#endif

}

arch/sparc/mm/io-unit.c

+15 −14
Original line number Diff line number Diff line
@@ -34,13 +34,18 @@ 
#define IOPERM        (IOUPTE_CACHE | IOUPTE_WRITE | IOUPTE_VALID)

#define MKIOPTE(phys) __iopte((((phys)>>4) & IOUPTE_PAGE) | IOPERM)



void __init

iounit_init(int sbi_node, int io_node, struct sbus_bus *sbus)

void __init iounit_init(struct sbus_bus *sbus)

{

	iopte_t *xpt, *xptend;

	struct device_node *dp = sbus->ofdev.node;

	struct iounit_struct *iounit;

	struct linux_prom_registers iommu_promregs[PROMREG_MAX];

	struct resource r;

	iopte_t *xpt, *xptend;

	struct of_device *op;



	op = of_find_device_by_node(dp);

	if (!op) {

		prom_printf("SUN4D: Cannot find SBI of_device.\n");

		prom_halt();

	}



	iounit = kzalloc(sizeof(struct iounit_struct), GFP_ATOMIC);

	if (!iounit) {
@@ -55,18 +60,14 @@ iounit_init(int sbi_node, int io_node, struct sbus_bus *sbus) 
	iounit->rotor[1] = IOUNIT_BMAP2_START;

	iounit->rotor[2] = IOUNIT_BMAPM_START;



	xpt = NULL;

	if(prom_getproperty(sbi_node, "reg", (void *) iommu_promregs,

			    sizeof(iommu_promregs)) != -1) {

		prom_apply_generic_ranges(io_node, 0, iommu_promregs, 3);

		memset(&r, 0, sizeof(r));

		r.flags = iommu_promregs[2].which_io;

		r.start = iommu_promregs[2].phys_addr;

		xpt = (iopte_t *) sbus_ioremap(&r, 0, PAGE_SIZE * 16, "XPT");

	xpt = of_ioremap(&op->resource[2], 0, PAGE_SIZE * 16, "XPT");

	if (!xpt) {

		prom_printf("SUN4D: Cannot map External Page Table.");

		prom_halt();

	}

	if(!xpt) panic("Cannot map External Page Table.");

	

	sbus->ofdev.dev.archdata.iommu = iounit;

	op->dev.archdata.iommu = iounit;

	iounit->page_table = xpt;

	spin_lock_init(&iounit->lock);

arch/sparc/mm/iommu.c

+20 −15
Original line number Diff line number Diff line
@@ -55,30 +55,34 @@ static pgprot_t dvma_prot; /* Consistent mapping pte flags */ 
#define IOPERM        (IOPTE_CACHE | IOPTE_WRITE | IOPTE_VALID)

#define MKIOPTE(pfn, perm) (((((pfn)<<8) & IOPTE_PAGE) | (perm)) & ~IOPTE_WAZ)



void __init

iommu_init(int iommund, struct sbus_bus *sbus)

void __init iommu_init(struct device_node *parent, struct sbus_bus *sbus)

{

	unsigned int impl, vers;

	unsigned long tmp;

	struct of_device *parent_op, *op;

	struct iommu_struct *iommu;

	struct linux_prom_registers iommu_promregs[PROMREG_MAX];

	struct resource r;

	unsigned int impl, vers;

	unsigned long *bitmap;

	unsigned long tmp;



	parent_op = of_find_device_by_node(parent);

	if (!parent_op) {

		prom_printf("Unable to find IOMMU of_device\n");

		prom_halt();

	}



	op = of_find_device_by_node(sbus->ofdev.node);

	if (!op) {

		prom_printf("Unable to find SBUS of_device\n");

		prom_halt();

	}



	iommu = kmalloc(sizeof(struct iommu_struct), GFP_ATOMIC);

	if (!iommu) {

		prom_printf("Unable to allocate iommu structure\n");

		prom_halt();

	}

	iommu->regs = NULL;

	if (prom_getproperty(iommund, "reg", (void *) iommu_promregs,

			 sizeof(iommu_promregs)) != -1) {

		memset(&r, 0, sizeof(r));

		r.flags = iommu_promregs[0].which_io;

		r.start = iommu_promregs[0].phys_addr;

		iommu->regs = (struct iommu_regs *)

			sbus_ioremap(&r, 0, PAGE_SIZE * 3, "iommu_regs");

	}



	iommu->regs = of_ioremap(&parent_op->resource[0], 0, PAGE_SIZE * 3,

				 "iommu_regs");

	if (!iommu->regs) {

		prom_printf("Cannot map IOMMU registers\n");

		prom_halt();
@@ -133,6 +137,7 @@ iommu_init(int iommund, struct sbus_bus *sbus) 
	    (int)(IOMMU_NPTES*sizeof(iopte_t)), (int)IOMMU_NPTES);



	sbus->ofdev.dev.archdata.iommu = iommu;

	op->dev.archdata.iommu = iommu;

}



/* This begs to be btfixup-ed by srmmu. */

CRA Git | Maintained and supported by SUSTech CRA and CCSE