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net: pcnet: Simplify private data allocation

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The current code is horribly complex. Both the RX and TX buffer
descriptors are 16 bytes in size, the init block is 32 bytes in
size, so simplify the code such that the entire private data of
the driver are allocated cache aligned and the RX and TX buffer
descriptors are part of the private data.

This removes multiple malloc calls and cache flushes.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Cc: Joe Hershberger <joe.hershberger@ni.com>
This commit is contained in:
Marek Vasut 2020-05-17 18:24:14 +02:00 committed by Daniel Schwierzeck
parent d3b1df0f39
commit 89369b0ac2
1 changed files with 12 additions and 21 deletions
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33
drivers/net/pcnet.c
View file

@ -10,6 +10,7 @@
#include <cpu_func.h>
#include <log.h>
#include <malloc.h>
#include <memalign.h>
#include <net.h>
#include <netdev.h>
#include <asm/cache.h>
@ -74,12 +75,13 @@ struct pcnet_uncached_priv {
struct pcnet_rx_head rx_ring[RX_RING_SIZE];
struct pcnet_tx_head tx_ring[TX_RING_SIZE];
struct pcnet_init_block init_block;
};
} __aligned(ARCH_DMA_MINALIGN);
struct pcnet_priv {
struct pcnet_uncached_priv *uc;
struct pcnet_uncached_priv ucp;
/* Receive Buffer space */
unsigned char (*rx_buf)[RX_RING_SIZE][PKT_BUF_SZ + 4];
unsigned char rx_buf[RX_RING_SIZE][PKT_BUF_SZ + 4];
struct pcnet_uncached_priv *uc;
int cur_rx;
int cur_tx;
};
@ -335,22 +337,11 @@ static int pcnet_init(struct eth_device *dev, bd_t *bis)
* must be aligned on 16-byte boundaries.
*/
if (lp == NULL) {
addr = (unsigned long)malloc(sizeof(*lp) + 0x10);
addr = (addr + 0xf) & ~0xf;
lp = (struct pcnet_priv *)addr;
addr = (unsigned long)memalign(ARCH_DMA_MINALIGN,
sizeof(*lp->uc));
flush_dcache_range(addr, addr + sizeof(*lp->uc));
addr = (unsigned long)map_physmem(addr,
roundup(sizeof(*lp->uc), ARCH_DMA_MINALIGN),
MAP_NOCACHE);
lp->uc = (struct pcnet_uncached_priv *)addr;
addr = (unsigned long)memalign(ARCH_DMA_MINALIGN,
sizeof(*lp->rx_buf));
flush_dcache_range(addr, addr + sizeof(*lp->rx_buf));
lp->rx_buf = (void *)addr;
lp = malloc_cache_aligned(sizeof(*lp));
lp->uc = map_physmem((phys_addr_t)&lp->ucp,
sizeof(lp->ucp), MAP_NOCACHE);
flush_dcache_range((unsigned long)lp,
(unsigned long)lp + sizeof(*lp));
}
uc = lp->uc;
@ -364,7 +355,7 @@ static int pcnet_init(struct eth_device *dev, bd_t *bis)
*/
lp->cur_rx = 0;
for (i = 0; i < RX_RING_SIZE; i++) {
addr = pcnet_virt_to_mem(dev, (*lp->rx_buf)[i]);
addr = pcnet_virt_to_mem(dev, lp->rx_buf[i]);
uc->rx_ring[i].base = cpu_to_le32(addr);
uc->rx_ring[i].buf_length = cpu_to_le16(-PKT_BUF_SZ);
uc->rx_ring[i].status = cpu_to_le16(0x8000);
@ -521,7 +512,7 @@ static int pcnet_recv (struct eth_device *dev)
printf("%s: Rx%d: invalid packet length %d\n",
dev->name, lp->cur_rx, pkt_len);
} else {
buf = (*lp->rx_buf)[lp->cur_rx];
buf = lp->rx_buf[lp->cur_rx];
invalidate_dcache_range((unsigned long)buf,
(unsigned long)buf + pkt_len);
net_process_received_packet(buf, pkt_len);