From: Al Viro <[email protected]>
sanitized probing code, made sure we claim regions before poking into
them (original tried that to some extent, but hadn't got it right),
switched to ioremap() use in probing.
Signed-off-by: Al Viro <[email protected]>
Signed-off-by: Adrian Bunk <[email protected]>
---
drivers/net/arcnet/arc-rimi.c | 68 +++++++++++++++------
drivers/net/arcnet/com90xx.c | 132 +++++++++++++++++++++++++++++------------
2 files changed, 143 insertions(+), 57 deletions(-)
6a0100f551bbd751fba9d68575dcb15e5554e130
diff --git a/drivers/net/arcnet/arc-rimi.c b/drivers/net/arcnet/arc-rimi.c
--- a/drivers/net/arcnet/arc-rimi.c
+++ b/drivers/net/arcnet/arc-rimi.c
@@ -97,25 +97,44 @@ static int __init arcrimi_probe(struct n
"must specify the shmem and irq!\n");
return -ENODEV;
}
+ if (dev->dev_addr[0] == 0) {
+ BUGMSG(D_NORMAL, "You need to specify your card's station "
+ "ID!\n");
+ return -ENODEV;
+ }
/*
- * Grab the memory region at mem_start for BUFFER_SIZE bytes.
+ * Grab the memory region at mem_start for MIRROR_SIZE bytes.
* Later in arcrimi_found() the real size will be determined
* and this reserve will be released and the correct size
* will be taken.
*/
- if (!request_mem_region(dev->mem_start, BUFFER_SIZE, "arcnet (90xx)")) {
+ if (!request_mem_region(dev->mem_start, MIRROR_SIZE, "arcnet (90xx)")) {
BUGMSG(D_NORMAL, "Card memory already allocated\n");
return -ENODEV;
}
- if (dev->dev_addr[0] == 0) {
- release_mem_region(dev->mem_start, BUFFER_SIZE);
- BUGMSG(D_NORMAL, "You need to specify your card's station "
- "ID!\n");
- return -ENODEV;
- }
return arcrimi_found(dev);
}
+static int check_mirror(unsigned long addr, size_t size)
+{
+ void __iomem *p;
+ int res = -1;
+
+ if (!request_mem_region(addr, size, "arcnet (90xx)"))
+ return -1;
+
+ p = ioremap(addr, size);
+ if (p) {
+ if (readb(p) == TESTvalue)
+ res = 1;
+ else
+ res = 0;
+ iounmap(p);
+ }
+
+ release_mem_region(addr, size);
+ return res;
+}
/*
* Set up the struct net_device associated with this card. Called after
@@ -125,19 +144,28 @@ static int __init arcrimi_found(struct n
{
struct arcnet_local *lp;
unsigned long first_mirror, last_mirror, shmem;
+ void __iomem *p;
int mirror_size;
int err;
+ p = ioremap(dev->mem_start, MIRROR_SIZE);
+ if (!p) {
+ release_mem_region(dev->mem_start, MIRROR_SIZE);
+ BUGMSG(D_NORMAL, "Can't ioremap\n");
+ return -ENODEV;
+ }
+
/* reserve the irq */
if (request_irq(dev->irq, &arcnet_interrupt, 0, "arcnet (RIM I)", dev)) {
- release_mem_region(dev->mem_start, BUFFER_SIZE);
+ iounmap(p);
+ release_mem_region(dev->mem_start, MIRROR_SIZE);
BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", dev->irq);
return -ENODEV;
}
shmem = dev->mem_start;
- isa_writeb(TESTvalue, shmem);
- isa_writeb(dev->dev_addr[0], shmem + 1); /* actually the node ID */
+ writeb(TESTvalue, p);
+ writeb(dev->dev_addr[0], p + 1); /* actually the node ID */
/* find the real shared memory start/end points, including mirrors */
@@ -146,17 +174,18 @@ static int __init arcrimi_found(struct n
* 2k (or there are no mirrors at all) but on some, it's 4k.
*/
mirror_size = MIRROR_SIZE;
- if (isa_readb(shmem) == TESTvalue
- && isa_readb(shmem - mirror_size) != TESTvalue
- && isa_readb(shmem - 2 * mirror_size) == TESTvalue)
- mirror_size *= 2;
+ if (readb(p) == TESTvalue
+ && check_mirror(shmem - MIRROR_SIZE, MIRROR_SIZE) == 0
+ && check_mirror(shmem - 2 * MIRROR_SIZE, MIRROR_SIZE) == 1)
+ mirror_size = 2 * MIRROR_SIZE;
- first_mirror = last_mirror = shmem;
- while (isa_readb(first_mirror) == TESTvalue)
+ first_mirror = shmem - mirror_size;
+ while (check_mirror(first_mirror, mirror_size) == 1)
first_mirror -= mirror_size;
first_mirror += mirror_size;
- while (isa_readb(last_mirror) == TESTvalue)
+ last_mirror = shmem + mirror_size;
+ while (check_mirror(last_mirror, mirror_size) == 1)
last_mirror += mirror_size;
last_mirror -= mirror_size;
@@ -181,7 +210,8 @@ static int __init arcrimi_found(struct n
* with the correct size. There is a VERY slim chance this could
* fail.
*/
- release_mem_region(shmem, BUFFER_SIZE);
+ iounmap(p);
+ release_mem_region(shmem, MIRROR_SIZE);
if (!request_mem_region(dev->mem_start,
dev->mem_end - dev->mem_start + 1,
"arcnet (90xx)")) {
diff --git a/drivers/net/arcnet/com90xx.c b/drivers/net/arcnet/com90xx.c
--- a/drivers/net/arcnet/com90xx.c
+++ b/drivers/net/arcnet/com90xx.c
@@ -53,7 +53,7 @@
/* Internal function declarations */
-static int com90xx_found(int ioaddr, int airq, u_long shmem);
+static int com90xx_found(int ioaddr, int airq, u_long shmem, void __iomem *);
static void com90xx_command(struct net_device *dev, int command);
static int com90xx_status(struct net_device *dev);
static void com90xx_setmask(struct net_device *dev, int mask);
@@ -116,14 +116,26 @@ static void __init com90xx_probe(void)
unsigned long airqmask;
int ports[(0x3f0 - 0x200) / 16 + 1] =
{0};
- u_long shmems[(0xFF800 - 0xA0000) / 2048 + 1] =
- {0};
+ unsigned long *shmems;
+ void __iomem **iomem;
int numports, numshmems, *port;
u_long *p;
+ int index;
if (!io && !irq && !shmem && !*device && com90xx_skip_probe)
return;
+ shmems = kzalloc(((0x10000-0xa0000) / 0x800) * sizeof(unsigned long),
+ GFP_KERNEL);
+ if (!shmems)
+ return;
+ iomem = kzalloc(((0x10000-0xa0000) / 0x800) * sizeof(void __iomem *),
+ GFP_KERNEL);
+ if (!iomem) {
+ kfree(shmems);
+ return;
+ }
+
BUGLVL(D_NORMAL) printk(VERSION);
/* set up the arrays where we'll store the possible probe addresses */
@@ -179,6 +191,8 @@ static void __init com90xx_probe(void)
if (!numports) {
BUGMSG2(D_NORMAL, "S1: No ARCnet cards found.\n");
+ kfree(shmems);
+ kfree(iomem);
return;
}
/* Stage 2: we have now reset any possible ARCnet cards, so we can't
@@ -202,8 +216,8 @@ static void __init com90xx_probe(void)
* 0xD1 byte in the right place, or are read-only.
*/
numprint = -1;
- for (p = &shmems[0]; p < shmems + numshmems; p++) {
- u_long ptr = *p;
+ for (index = 0, p = &shmems[0]; index < numshmems; p++, index++) {
+ void __iomem *base;
numprint++;
numprint %= 8;
@@ -213,38 +227,49 @@ static void __init com90xx_probe(void)
}
BUGMSG2(D_INIT, "%lXh ", *p);
- if (!request_mem_region(*p, BUFFER_SIZE, "arcnet (90xx)")) {
+ if (!request_mem_region(*p, MIRROR_SIZE, "arcnet (90xx)")) {
BUGMSG2(D_INIT_REASONS, "(request_mem_region)\n");
BUGMSG2(D_INIT_REASONS, "Stage 3: ");
BUGLVL(D_INIT_REASONS) numprint = 0;
- *p-- = shmems[--numshmems];
- continue;
+ goto out;
+ }
+ base = ioremap(*p, MIRROR_SIZE);
+ if (!base) {
+ BUGMSG2(D_INIT_REASONS, "(ioremap)\n");
+ BUGMSG2(D_INIT_REASONS, "Stage 3: ");
+ BUGLVL(D_INIT_REASONS) numprint = 0;
+ goto out1;
}
- if (isa_readb(ptr) != TESTvalue) {
+ if (readb(base) != TESTvalue) {
BUGMSG2(D_INIT_REASONS, "(%02Xh != %02Xh)\n",
- isa_readb(ptr), TESTvalue);
+ readb(base), TESTvalue);
BUGMSG2(D_INIT_REASONS, "S3: ");
BUGLVL(D_INIT_REASONS) numprint = 0;
- release_mem_region(*p, BUFFER_SIZE);
- *p-- = shmems[--numshmems];
- continue;
+ goto out2;
}
/* By writing 0x42 to the TESTvalue location, we also make
* sure no "mirror" shmem areas show up - if they occur
* in another pass through this loop, they will be discarded
* because *cptr != TESTvalue.
*/
- isa_writeb(0x42, ptr);
- if (isa_readb(ptr) != 0x42) {
+ writeb(0x42, base);
+ if (readb(base) != 0x42) {
BUGMSG2(D_INIT_REASONS, "(read only)\n");
BUGMSG2(D_INIT_REASONS, "S3: ");
- release_mem_region(*p, BUFFER_SIZE);
- *p-- = shmems[--numshmems];
- continue;
+ goto out2;
}
BUGMSG2(D_INIT_REASONS, "\n");
BUGMSG2(D_INIT_REASONS, "S3: ");
BUGLVL(D_INIT_REASONS) numprint = 0;
+ iomem[index] = base;
+ continue;
+ out2:
+ iounmap(base);
+ out1:
+ release_mem_region(*p, MIRROR_SIZE);
+ out:
+ *p-- = shmems[--numshmems];
+ index--;
}
BUGMSG2(D_INIT, "\n");
@@ -252,6 +277,8 @@ static void __init com90xx_probe(void)
BUGMSG2(D_NORMAL, "S3: No ARCnet cards found.\n");
for (port = &ports[0]; port < ports + numports; port++)
release_region(*port, ARCNET_TOTAL_SIZE);
+ kfree(shmems);
+ kfree(iomem);
return;
}
/* Stage 4: something of a dummy, to report the shmems that are
@@ -351,30 +378,32 @@ static void __init com90xx_probe(void)
mdelay(RESETtime);
} else {
/* just one shmem and port, assume they match */
- isa_writeb(TESTvalue, shmems[0]);
+ writeb(TESTvalue, iomem[0]);
}
#else
inb(_RESET);
mdelay(RESETtime);
#endif
- for (p = &shmems[0]; p < shmems + numshmems; p++) {
- u_long ptr = *p;
+ for (index = 0; index < numshmems; index++) {
+ u_long ptr = shmems[index];
+ void __iomem *base = iomem[index];
- if (isa_readb(ptr) == TESTvalue) { /* found one */
+ if (readb(base) == TESTvalue) { /* found one */
BUGMSG2(D_INIT, "%lXh)\n", *p);
openparen = 0;
/* register the card */
- if (com90xx_found(*port, airq, *p) == 0)
+ if (com90xx_found(*port, airq, ptr, base) == 0)
found = 1;
numprint = -1;
/* remove shmem from the list */
- *p = shmems[--numshmems];
+ shmems[index] = shmems[--numshmems];
+ iomem[index] = iomem[numshmems];
break; /* go to the next I/O port */
} else {
- BUGMSG2(D_INIT_REASONS, "%Xh-", isa_readb(ptr));
+ BUGMSG2(D_INIT_REASONS, "%Xh-", readb(base));
}
}
@@ -391,17 +420,40 @@ static void __init com90xx_probe(void)
BUGLVL(D_INIT_REASONS) printk("\n");
/* Now put back TESTvalue on all leftover shmems. */
- for (p = &shmems[0]; p < shmems + numshmems; p++) {
- isa_writeb(TESTvalue, *p);
- release_mem_region(*p, BUFFER_SIZE);
+ for (index = 0; index < numshmems; index++) {
+ writeb(TESTvalue, iomem[index]);
+ iounmap(iomem[index]);
+ release_mem_region(shmems[index], MIRROR_SIZE);
}
+ kfree(shmems);
+ kfree(iomem);
}
+static int check_mirror(unsigned long addr, size_t size)
+{
+ void __iomem *p;
+ int res = -1;
+
+ if (!request_mem_region(addr, size, "arcnet (90xx)"))
+ return -1;
+
+ p = ioremap(addr, size);
+ if (p) {
+ if (readb(p) == TESTvalue)
+ res = 1;
+ else
+ res = 0;
+ iounmap(p);
+ }
+
+ release_mem_region(addr, size);
+ return res;
+}
/* Set up the struct net_device associated with this card. Called after
* probing succeeds.
*/
-static int __init com90xx_found(int ioaddr, int airq, u_long shmem)
+static int __init com90xx_found(int ioaddr, int airq, u_long shmem, void __iomem *p)
{
struct net_device *dev = NULL;
struct arcnet_local *lp;
@@ -412,7 +464,8 @@ static int __init com90xx_found(int ioad
dev = alloc_arcdev(device);
if (!dev) {
BUGMSG2(D_NORMAL, "com90xx: Can't allocate device!\n");
- release_mem_region(shmem, BUFFER_SIZE);
+ iounmap(p);
+ release_mem_region(shmem, MIRROR_SIZE);
return -ENOMEM;
}
lp = dev->priv;
@@ -423,24 +476,27 @@ static int __init com90xx_found(int ioad
* 2k (or there are no mirrors at all) but on some, it's 4k.
*/
mirror_size = MIRROR_SIZE;
- if (isa_readb(shmem) == TESTvalue
- && isa_readb(shmem - mirror_size) != TESTvalue
- && isa_readb(shmem - 2 * mirror_size) == TESTvalue)
- mirror_size *= 2;
+ if (readb(p) == TESTvalue &&
+ check_mirror(shmem - MIRROR_SIZE, MIRROR_SIZE) == 0 &&
+ check_mirror(shmem - 2 * MIRROR_SIZE, MIRROR_SIZE) == 1)
+ mirror_size = 2 * MIRROR_SIZE;
- first_mirror = last_mirror = shmem;
- while (isa_readb(first_mirror) == TESTvalue)
+ first_mirror = shmem - mirror_size;
+ while (check_mirror(first_mirror, mirror_size) == 1)
first_mirror -= mirror_size;
first_mirror += mirror_size;
- while (isa_readb(last_mirror) == TESTvalue)
+ last_mirror = shmem + mirror_size;
+ while (check_mirror(last_mirror, mirror_size) == 1)
last_mirror += mirror_size;
last_mirror -= mirror_size;
dev->mem_start = first_mirror;
dev->mem_end = last_mirror + MIRROR_SIZE - 1;
- release_mem_region(shmem, BUFFER_SIZE);
+ iounmap(p);
+ release_mem_region(shmem, MIRROR_SIZE);
+
if (!request_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1, "arcnet (90xx)"))
goto err_free_dev;
-
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