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Date: Mon, 21 Dec 2015 23:47:53 +0000
From: Al Viro <viro@...IV.linux.org.uk>
To: linux-kernel@...r.kernel.org
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Subject: [POC][PATCH 80/83] [sun3] try to sort dvma types out
From: Al Viro <viro@...iv.linux.org.uk>
[I've pretty much zero confidence in that one - if anything, it would need
to be split]
Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
---
arch/m68k/include/asm/dvma.h | 21 +++++--------
arch/m68k/sun3/dvma.c | 31 ++++++++-----------
arch/m68k/sun3/sun3dvma.c | 52 ++++++++++++++------------------
arch/m68k/sun3x/dvma.c | 15 +++------
drivers/net/ethernet/i825xx/sun3_82586.c | 13 ++++----
drivers/scsi/sun3_scsi.c | 23 ++++++--------
6 files changed, 64 insertions(+), 91 deletions(-)
diff --git a/arch/m68k/include/asm/dvma.h b/arch/m68k/include/asm/dvma.h
index 890bbf7..1fa85e5 100644
--- a/arch/m68k/include/asm/dvma.h
+++ b/arch/m68k/include/asm/dvma.h
@@ -16,18 +16,16 @@
#define DVMA_PAGE_ALIGN(addr) ALIGN(addr, DVMA_PAGE_SIZE)
extern void dvma_init(void);
-extern int dvma_map_iommu(unsigned long kaddr, unsigned long baddr,
- int len);
+extern int dvma_map_iommu(void *kaddr, unsigned long baddr, int len);
#define dvma_malloc(x) dvma_malloc_align(x, 0)
#define dvma_map(x, y) dvma_map_align(x, y, 0)
#define dvma_map_vme(x, y) (dvma_map(x, y) & 0xfffff)
#define dvma_map_align_vme(x, y, z) (dvma_map_align (x, y, z) & 0xfffff)
-extern unsigned long dvma_map_align(unsigned long kaddr, int len,
- int align);
+extern unsigned long dvma_map_align(void *kaddr, int len, int align);
extern void *dvma_malloc_align(unsigned long len, unsigned long align);
-extern void dvma_unmap(void *baddr);
+extern void dvma_unmap(unsigned long);
extern void dvma_free(void *vaddr);
@@ -51,14 +49,13 @@ extern void dvma_free(void *vaddr);
/* virt <-> phys conversions */
#define dvma_vtop(x) ((unsigned long)(x) & 0xffffff)
-#define dvma_ptov(x) ((unsigned long)(x) | 0xf000000)
+#define dvma_ptov(x) ((void *)((unsigned long)(x) | 0xf000000))
#define dvma_vtovme(x) ((unsigned long)(x) & 0x00fffff)
-#define dvma_vmetov(x) ((unsigned long)(x) | 0xff00000)
+#define dvma_vmetov(x) ((void*)((unsigned long)(x) | 0xff00000))
#define dvma_vtob(x) dvma_vtop(x)
#define dvma_btov(x) dvma_ptov(x)
-static inline int dvma_map_cpu(unsigned long kaddr, unsigned long vaddr,
- int len)
+static inline int dvma_map_cpu(void *kaddr, void *vaddr, int len)
{
return 0;
}
@@ -75,11 +72,9 @@ static inline int dvma_map_cpu(unsigned long kaddr, unsigned long vaddr,
#define IOMMU_ENTRIES (IOMMU_TOTAL_ENTRIES - 0x80)
#define dvma_vtob(x) ((unsigned long)(x) & 0x00ffffff)
-#define dvma_btov(x) ((unsigned long)(x) | 0xff000000)
-
-extern int dvma_map_cpu(unsigned long kaddr, unsigned long vaddr, int len);
-
+#define dvma_btov(x) ((void *)((unsigned long)(x) | 0xff000000))
+extern int dvma_map_cpu(void *kaddr, void *vaddr, int len);
/* everything below this line is specific to dma used for the onboard
ESP scsi on sun3x */
diff --git a/arch/m68k/sun3/dvma.c b/arch/m68k/sun3/dvma.c
index d95506e..0b0d352 100644
--- a/arch/m68k/sun3/dvma.c
+++ b/arch/m68k/sun3/dvma.c
@@ -20,47 +20,42 @@
static unsigned long ptelist[120];
-static unsigned long dvma_page(unsigned long kaddr, unsigned long vaddr)
+static void *dvma_page(void *kaddr, void *vaddr)
{
unsigned long pte;
unsigned long j;
pte_t ptep;
+ int idx;
j = *(volatile unsigned long *)kaddr;
*(volatile unsigned long *)kaddr = j;
ptep = pfn_pte(virt_to_pfn(kaddr), PAGE_KERNEL);
pte = pte_val(ptep);
-// printk("dvma_remap: addr %lx -> %lx pte %08lx len %x\n",
+// printk("dvma_remap: addr %p -> %lx pte %08lx len %x\n",
// kaddr, vaddr, pte, len);
- if(ptelist[(vaddr & 0xff000) >> PAGE_SHIFT] != pte) {
- sun3_put_pte(vaddr, pte);
- ptelist[(vaddr & 0xff000) >> PAGE_SHIFT] = pte;
- }
+ idx = ((unsigned long)vaddr & 0xff000) >> PAGE_SHIFT;
- return (vaddr + (kaddr & ~PAGE_MASK));
+ if (ptelist[idx] != pte) {
+ sun3_put_pte((unsigned long)vaddr, pte);
+ ptelist[idx] = pte;
+ }
+ return vaddr + offset_in_page(kaddr);
}
-int dvma_map_iommu(unsigned long kaddr, unsigned long baddr,
- int len)
+int dvma_map_iommu(void *kaddr, unsigned long baddr, int len)
{
+ void *vaddr = dvma_btov(baddr);
+ void *end = vaddr + len;
- unsigned long end;
- unsigned long vaddr;
-
- vaddr = dvma_btov(baddr);
-
- end = vaddr + len;
-
- while(vaddr < end) {
+ while (vaddr < end) {
dvma_page(kaddr, vaddr);
kaddr += PAGE_SIZE;
vaddr += PAGE_SIZE;
}
return 0;
-
}
void __init sun3_dvma_init(void)
diff --git a/arch/m68k/sun3/sun3dvma.c b/arch/m68k/sun3/sun3dvma.c
index fdc4900..68eefa4 100644
--- a/arch/m68k/sun3/sun3dvma.c
+++ b/arch/m68k/sun3/sun3dvma.c
@@ -277,7 +277,7 @@ void __init dvma_init(void)
}
-unsigned long dvma_map_align(unsigned long kaddr, int len, int align)
+unsigned long dvma_map_align(void *kaddr, int len, int align)
{
unsigned long baddr;
@@ -287,58 +287,52 @@ unsigned long dvma_map_align(unsigned long kaddr, int len, int align)
len = 0x800;
if(!kaddr || !len) {
-// printk("error: kaddr %lx len %x\n", kaddr, len);
+// printk("error: kaddr %p len %x\n", kaddr, len);
// *(int *)4 = 0;
return 0;
}
#ifdef DEBUG
- printk("dvma_map request %08lx bytes from %08lx\n",
+ printk("dvma_map request %08lx bytes from %p\n",
len, kaddr);
#endif
- off = kaddr & ~DVMA_PAGE_MASK;
- kaddr &= PAGE_MASK;
+ off = (unsigned long)kaddr % DVMA_PAGE_SIZE;
+ kaddr -= off;
len += off;
- len = ((len + (DVMA_PAGE_SIZE-1)) & DVMA_PAGE_MASK);
+ len = ALIGN(len, DVMA_PAGE_SIZE);
if(align == 0)
align = DVMA_PAGE_SIZE;
else
- align = ((align + (DVMA_PAGE_SIZE-1)) & DVMA_PAGE_MASK);
+ align = ALIGN(align, DVMA_PAGE_SIZE);
baddr = get_baddr(len, align);
// printk("using baddr %lx\n", baddr);
- if(!dvma_map_iommu(kaddr, baddr, len))
+ if (!dvma_map_iommu(kaddr, baddr, len))
return (baddr + off);
- printk("dvma_map failed kaddr %lx baddr %lx len %x\n", kaddr, baddr, len);
+ printk("dvma_map failed kaddr %p baddr %lx len %x\n", kaddr, baddr, len);
BUG();
return 0;
}
EXPORT_SYMBOL(dvma_map_align);
-void dvma_unmap(void *baddr)
+void dvma_unmap(unsigned long baddr)
{
- unsigned long addr;
-
- addr = (unsigned long)baddr;
/* check if this is a vme mapping */
- if(!(addr & 0x00f00000))
- addr |= 0xf00000;
-
- free_baddr(addr);
-
- return;
+ if (!(baddr & 0x00f00000))
+ baddr |= 0xf00000;
+ free_baddr(baddr);
}
EXPORT_SYMBOL(dvma_unmap);
void *dvma_malloc_align(unsigned long len, unsigned long align)
{
- unsigned long kaddr;
+ void *kaddr;
unsigned long baddr;
- unsigned long vaddr;
+ void *vaddr;
if(!len)
return NULL;
@@ -348,28 +342,28 @@ void *dvma_malloc_align(unsigned long len, unsigned long align)
#endif
len = ((len + (DVMA_PAGE_SIZE-1)) & DVMA_PAGE_MASK);
- if((kaddr = __get_free_pages(GFP_ATOMIC, get_order(len))) == 0)
+ if((kaddr = get_free_pages(GFP_ATOMIC, get_order(len))) == NULL)
return NULL;
- if((baddr = (unsigned long)dvma_map_align(kaddr, len, align)) == 0) {
- free_pages((void *)kaddr, get_order(len));
+ if((baddr = dvma_map_align(kaddr, len, align)) == 0) {
+ free_pages(kaddr, get_order(len));
return NULL;
}
vaddr = dvma_btov(baddr);
- if(dvma_map_cpu(kaddr, vaddr, len) < 0) {
- dvma_unmap((void *)baddr);
- free_pages((void *)kaddr, get_order(len));
+ if (dvma_map_cpu(kaddr, vaddr, len) < 0) {
+ dvma_unmap(baddr);
+ free_pages(kaddr, get_order(len));
return NULL;
}
#ifdef DEBUG
- printk("mapped %08lx bytes %08lx kern -> %08lx bus\n",
+ printk("mapped %08lx bytes %p kern -> %08lx bus\n",
len, kaddr, baddr);
#endif
- return (void *)vaddr;
+ return vaddr;
}
EXPORT_SYMBOL(dvma_malloc_align);
diff --git a/arch/m68k/sun3x/dvma.c b/arch/m68k/sun3x/dvma.c
index d5ddcda..a85faa5 100644
--- a/arch/m68k/sun3x/dvma.c
+++ b/arch/m68k/sun3x/dvma.c
@@ -79,18 +79,14 @@ void dvma_print (unsigned long dvma_addr)
/* create a virtual mapping for a page assigned within the IOMMU
so that the cpu can reach it easily */
-inline int dvma_map_cpu(unsigned long kaddr,
- unsigned long vaddr, int len)
+int dvma_map_cpu(void *k, void *v, int len)
{
pgd_t *pgd;
- unsigned long end;
+ unsigned long kaddr = (unsigned long)k & PAGE_MASK;
+ unsigned long vaddr = (unsigned long)v & PAGE_MASK;
+ unsigned long end = PAGE_ALIGN(vaddr + len);
int ret = 0;
- kaddr &= PAGE_MASK;
- vaddr &= PAGE_MASK;
-
- end = PAGE_ALIGN(vaddr + len);
-
#ifdef DEBUG
printk("dvma: mapping kern %08lx to virt %08lx\n",
kaddr, vaddr);
@@ -148,8 +144,7 @@ inline int dvma_map_cpu(unsigned long kaddr,
}
-inline int dvma_map_iommu(unsigned long kaddr, unsigned long baddr,
- int len)
+int dvma_map_iommu(void *kaddr, unsigned long baddr, int len)
{
unsigned long end, index;
diff --git a/drivers/net/ethernet/i825xx/sun3_82586.c b/drivers/net/ethernet/i825xx/sun3_82586.c
index 353f57f6..a9a279f 100644
--- a/drivers/net/ethernet/i825xx/sun3_82586.c
+++ b/drivers/net/ethernet/i825xx/sun3_82586.c
@@ -131,7 +131,7 @@ static void sun3_82586_dump(struct net_device *,void *);
/* helper-functions */
static int init586(struct net_device *dev);
-static int check586(struct net_device *dev,char *where,unsigned size);
+static int check586(struct net_device *dev,unsigned long where,unsigned size);
static void alloc586(struct net_device *dev);
static void startrecv586(struct net_device *dev);
static void *alloc_rfa(struct net_device *dev,void *ptr);
@@ -203,7 +203,7 @@ static int sun3_82586_open(struct net_device *dev)
/**********************************************
* Check to see if there's an 82586 out there.
*/
-static int check586(struct net_device *dev,char *where,unsigned size)
+static int check586(struct net_device *dev,unsigned long where,unsigned size)
{
struct priv pb;
struct priv *p = &pb;
@@ -211,7 +211,7 @@ static int check586(struct net_device *dev,char *where,unsigned size)
int i;
p->base = (unsigned long) dvma_btov(0);
- p->memtop = (char *)dvma_btov((unsigned long)where);
+ p->memtop = dvma_btov(where);
p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS);
memset((char *)p->scp,0, sizeof(struct scp_struct));
for(i=0;i<sizeof(struct scp_struct);i++) /* memory was writeable? */
@@ -221,7 +221,7 @@ static int check586(struct net_device *dev,char *where,unsigned size)
if(p->scp->sysbus != SYSBUSVAL)
return 0;
- iscp_addr = (char *)dvma_btov((unsigned long)where);
+ iscp_addr = dvma_btov(where);
p->iscp = (struct iscp_struct *) iscp_addr;
memset((char *)p->iscp,0, sizeof(struct iscp_struct));
@@ -366,14 +366,13 @@ static int __init sun3_82586_probe1(struct net_device *dev,int ioaddr)
retval = -ENODEV;
goto out;
}
- if(!check586(dev,(char *) dev->mem_start,size)) {
+ if(!check586(dev, dev->mem_start,size)) {
printk("?memcheck, Can't find memory at 0x%lx with size %d!\n",dev->mem_start,size);
retval = -ENODEV;
goto out;
}
- ((struct priv *)netdev_priv(dev))->memtop =
- (char *)dvma_btov(dev->mem_start);
+ ((struct priv *)netdev_priv(dev))->memtop = dvma_btov(dev->mem_start);
((struct priv *)netdev_priv(dev))->base = (unsigned long) dvma_btov(0);
alloc586(dev);
diff --git a/drivers/scsi/sun3_scsi.c b/drivers/scsi/sun3_scsi.c
index 22a4283..5cfc634 100644
--- a/drivers/scsi/sun3_scsi.c
+++ b/drivers/scsi/sun3_scsi.c
@@ -100,7 +100,7 @@ static struct scsi_cmnd *sun3_dma_setup_done;
static unsigned char *sun3_scsi_regp;
static volatile struct sun3_dma_regs *dregs;
static struct sun3_udc_regs *udc_regs;
-static unsigned char *sun3_dma_orig_addr = NULL;
+static unsigned long sun3_dma_orig_addr;
static unsigned long sun3_dma_orig_count = 0;
static int sun3_dma_active = 0;
static unsigned long last_residual = 0;
@@ -237,15 +237,15 @@ void sun3_sun3_debug (void)
/* sun3scsi_dma_setup() -- initialize the dma controller for a read/write */
static unsigned long sun3scsi_dma_setup(void *data, unsigned long count, int write_flag)
{
- void *addr;
+ unsigned long addr;
- if(sun3_dma_orig_addr != NULL)
+ if (sun3_dma_orig_addr)
dvma_unmap(sun3_dma_orig_addr);
#ifdef SUN3_SCSI_VME
- addr = (void *)dvma_map_vme((unsigned long) data, count);
+ addr = dvma_map_vme(data, count);
#else
- addr = (void *)dvma_map((unsigned long) data, count);
+ addr = dvma_map(data, count);
#endif
sun3_dma_orig_addr = addr;
@@ -399,9 +399,7 @@ static int sun3scsi_dma_finish(int write_flag)
last_residual = fifo;
/* empty bytes from the fifo which didn't make it */
if ((!write_flag) && (dregs->csr & CSR_LEFT)) {
- unsigned char *vaddr;
-
- vaddr = (unsigned char *)dvma_vmetov(sun3_dma_orig_addr);
+ unsigned char *vaddr = dvma_vmetov(sun3_dma_orig_addr);
vaddr += (sun3_dma_orig_count - fifo);
vaddr--;
@@ -444,11 +442,8 @@ static int sun3scsi_dma_finish(int write_flag)
/* empty bytes from the fifo which didn't make it */
if((!write_flag) && (count - fifo) == 2) {
- unsigned short data;
- unsigned char *vaddr;
-
- data = dregs->fifo_data;
- vaddr = (unsigned char *)dvma_btov(sun3_dma_orig_addr);
+ unsigned short data = dregs->fifo_data;
+ unsigned char *vaddr = dvma_btov(sun3_dma_orig_addr);
vaddr += (sun3_dma_orig_count - fifo);
@@ -458,7 +453,7 @@ static int sun3scsi_dma_finish(int write_flag)
#endif
dvma_unmap(sun3_dma_orig_addr);
- sun3_dma_orig_addr = NULL;
+ sun3_dma_orig_addr = 0;
#ifdef SUN3_SCSI_VME
dregs->dma_addr_hi = 0;
--
2.1.4
--
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