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[b44] Eliminate call to get_memmap() 

get_memmap() is not available under all runtime environments.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown 2012-07-17 21:20:50 +01:00
parent 88016deccf
commit 73ba154124
1 changed files with 31 additions and 26 deletions
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57
src/drivers/net/b44.c
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@ -78,24 +78,21 @@ static inline void bflush(const struct b44_private *bp, u32 reg, u32 timeout)
/**
* Return non-zero if the installed RAM is within
* the limit given and zero if it is outside.
* Hopefully will be removed soon.
* Check if card can access address
*
* @v address Virtual address
* @v address_ok Card can access address
*/
int phys_ram_within_limit(u64 limit)
{
struct memory_map memmap;
struct memory_region *highest = NULL;
get_memmap(&memmap);
static inline __attribute__ (( always_inline )) int
b44_address_ok ( void *address ) {
if (memmap.count == 0)
return 0;
highest = &memmap.regions[memmap.count - 1];
/* Card can address anything with a 30-bit address */
if ( ( virt_to_bus ( address ) & ~B44_30BIT_DMA_MASK ) == 0 )
return 1;
return (highest->end < limit);
return 0;
}
/**
* Ring cells waiting to be processed are between 'tx_cur' and 'pending'
* indexes in the ring.
@ -404,6 +401,7 @@ static void b44_populate_rx_descriptor(struct b44_private *bp, u32 idx)
*/
static void b44_rx_refill(struct b44_private *bp, u32 pending)
{
struct io_buffer *iobuf;
u32 i;
// skip pending
@ -411,11 +409,17 @@ static void b44_rx_refill(struct b44_private *bp, u32 pending)
if (bp->rx_iobuf[i] != NULL)
continue;
bp->rx_iobuf[i] = alloc_iob(RX_PKT_BUF_SZ);
if (!bp->rx_iobuf[i]) {
iobuf = alloc_iob(RX_PKT_BUF_SZ);
if (!iobuf) {
DBG("Refill rx ring failed!!\n");
break;
}
if (!b44_address_ok(iobuf->data)) {
DBG("Refill rx ring bad address!!\n");
free_iob(iobuf);
break;
}
bp->rx_iobuf[i] = iobuf;
b44_populate_rx_descriptor(bp, i);
}
@ -444,6 +448,10 @@ static int b44_init_rx_ring(struct b44_private *bp)
bp->rx = malloc_dma(B44_RX_RING_LEN_BYTES, B44_DMA_ALIGNMENT);
if (!bp->rx)
return -ENOMEM;
if (!b44_address_ok(bp->rx)) {
free_dma(bp->rx, B44_RX_RING_LEN_BYTES);
return -ENOTSUP;
}
memset(bp->rx_iobuf, 0, sizeof(bp->rx_iobuf));
@ -472,6 +480,10 @@ static int b44_init_tx_ring(struct b44_private *bp)
bp->tx = malloc_dma(B44_TX_RING_LEN_BYTES, B44_DMA_ALIGNMENT);
if (!bp->tx)
return -ENOMEM;
if (!b44_address_ok(bp->tx)) {
free_dma(bp->tx, B44_TX_RING_LEN_BYTES);
return -ENOTSUP;
}
memset(bp->tx, 0, B44_TX_RING_LEN_BYTES);
memset(bp->tx_iobuf, 0, sizeof(bp->tx_iobuf));
@ -644,17 +656,6 @@ static int b44_probe(struct pci_device *pci)
struct b44_private *bp;
int rc;
/*
* Bail out if more than 1GB of physical RAM is installed.
* This limitation will be removed later when dma mapping
* is merged into mainline.
*/
if (!phys_ram_within_limit(B44_30BIT_DMA_MASK)) {
DBG("Sorry, this version of the driver does not\n"
"support systems with more than 1GB of RAM.\n");
return -ENOMEM;
}
/* Set up netdev */
netdev = alloc_etherdev(sizeof(*bp));
if (!netdev)
@ -793,6 +794,10 @@ static int b44_transmit(struct net_device *netdev, struct io_buffer *iobuf)
return -ENOBUFS;
}
/* Check for addressability */
if (!b44_address_ok(iobuf->data))
return -ENOTSUP;
/* Will call netdev_tx_complete() on the iobuf later */
bp->tx_iobuf[cur] = iobuf;