[PATCH 08/13] net: rtl8139: Minor cleanup of rtl_poll()
Marek Vasut
marek.vasut at gmail.com
Mon Apr 13 00:03:54 CEST 2020
Rename the function to rtl8139_recv(), clean up various checkpatch errors,
line-over-80 conditions, and malformed comments. No functional change.
Signed-off-by: Marek Vasut <marek.vasut+renesas at gmail.com>
Cc: Joe Hershberger <joe.hershberger at ni.com>
---
drivers/net/rtl8139.c | 63 ++++++++++++++++++++++---------------------
1 file changed, 33 insertions(+), 30 deletions(-)
diff --git a/drivers/net/rtl8139.c b/drivers/net/rtl8139.c
index cb1166ead2..d942ccf627 100644
--- a/drivers/net/rtl8139.c
+++ b/drivers/net/rtl8139.c
@@ -44,7 +44,7 @@
which reserves the ranges 0x00000-0x10000 and 0x98000-0xA0000. My
interpretation of this "reserved" is that Etherboot may do whatever it
likes, as long as its environment is kept intact (like the BIOS
- variables). Hopefully fixed rtl_poll() once and for all. The symptoms
+ variables). Hopefully fixed rtl8139_recv() once and for all. The symptoms
were that if Etherboot was left at the boot menu for several minutes, the
first eth_poll failed. Seems like I am the only person who does this.
First of all I fixed the debugging code and then set out for a long bug
@@ -65,7 +65,7 @@
corruption because of exceeding 32K during runtime.
28 Jul 1999 (Matthias Meixner - meixner at rbg.informatik.tu-darmstadt.de)
- rtl_poll was quite broken: it used the RxOK interrupt flag instead
+ rtl8139_recv was quite broken: it used the RxOK interrupt flag instead
of the RxBufferEmpty flag which often resulted in very bad
transmission performace - below 1kBytes/s.
@@ -202,7 +202,7 @@ static int rtl8139_probe(struct eth_device *dev, bd_t *bis);
static int rtl8139_read_eeprom(unsigned int location, unsigned int addr_len);
static void rtl8139_reset(struct eth_device *dev);
static int rtl8139_send(struct eth_device *dev, void *packet, int length);
-static int rtl_poll(struct eth_device *dev);
+static int rtl8139_recv(struct eth_device *dev);
static void rtl_disable(struct eth_device *dev);
static int rtl_bcast_addr(struct eth_device *dev, const u8 *bcast_mac, int join)
{
@@ -247,7 +247,7 @@ int rtl8139_initialize(bd_t *bis)
dev->init = rtl8139_probe;
dev->halt = rtl_disable;
dev->send = rtl8139_send;
- dev->recv = rtl_poll;
+ dev->recv = rtl8139_recv;
dev->mcast = rtl_bcast_addr;
eth_register (dev);
@@ -468,7 +468,7 @@ static int rtl8139_send(struct eth_device *dev, void *packet, int length)
* Only acknlowledge interrupt sources we can properly
* handle here - the RTL_REG_INTRSTATUS_RXOVERFLOW/
* RTL_REG_INTRSTATUS_RXFIFOOVER MUST be handled in the
- * rtl_poll() function.
+ * rtl8139_recv() function.
*/
status &= RTL_REG_INTRSTATUS_TXOK | RTL_REG_INTRSTATUS_TXERR |
RTL_REG_INTRSTATUS_PCIERR;
@@ -499,27 +499,26 @@ static int rtl8139_send(struct eth_device *dev, void *packet, int length)
return length;
}
-static int rtl_poll(struct eth_device *dev)
+static int rtl8139_recv(struct eth_device *dev)
{
- unsigned int status;
- unsigned int ring_offs;
+ const unsigned int rxstat = RTL_REG_INTRSTATUS_RXFIFOOVER |
+ RTL_REG_INTRSTATUS_RXOVERFLOW |
+ RTL_REG_INTRSTATUS_RXOK;
unsigned int rx_size, rx_status;
- int length=0;
+ unsigned int ring_offs;
+ unsigned int status;
+ int length = 0;
ioaddr = dev->iobase;
- if (inb(ioaddr + RTL_REG_CHIPCMD) & RTL_REG_CHIPCMD_RXBUFEMPTY) {
+ if (inb(ioaddr + RTL_REG_CHIPCMD) & RTL_REG_CHIPCMD_RXBUFEMPTY)
return 0;
- }
status = inw(ioaddr + RTL_REG_INTRSTATUS);
/* See below for the rest of the interrupt acknowledges. */
- outw(status & ~(RTL_REG_INTRSTATUS_RXFIFOOVER |
- RTL_REG_INTRSTATUS_RXOVERFLOW |
- RTL_REG_INTRSTATUS_RXOK),
- ioaddr + RTL_REG_INTRSTATUS);
+ outw(status & ~rxstat, ioaddr + RTL_REG_INTRSTATUS);
- debug_cond(DEBUG_RX, "rtl_poll: int %hX ", status);
+ debug_cond(DEBUG_RX, "%s: int %hX ", __func__, status);
ring_offs = cur_rx % RX_BUF_LEN;
/* ring_offs is guaranteed being 4-byte aligned */
@@ -530,38 +529,42 @@ static int rtl_poll(struct eth_device *dev)
if ((rx_status & (RTL_STS_RXBADSYMBOL | RTL_STS_RXRUNT |
RTL_STS_RXTOOLONG | RTL_STS_RXCRCERR |
RTL_STS_RXBADALIGN)) ||
- (rx_size < ETH_ZLEN) || (rx_size > ETH_FRAME_LEN + 4)) {
+ (rx_size < ETH_ZLEN) ||
+ (rx_size > ETH_FRAME_LEN + 4)) {
printf("rx error %hX\n", rx_status);
- rtl8139_reset(dev); /* this clears all interrupts still pending */
+ /* this clears all interrupts still pending */
+ rtl8139_reset(dev);
return 0;
}
/* Received a good packet */
length = rx_size - 4; /* no one cares about the FCS */
- if (ring_offs+4+rx_size-4 > RX_BUF_LEN) {
- int semi_count = RX_BUF_LEN - ring_offs - 4;
+ if (ring_offs + 4 + rx_size - 4 > RX_BUF_LEN) {
unsigned char rxdata[RX_BUF_LEN];
+ int semi_count = RX_BUF_LEN - ring_offs - 4;
memcpy(rxdata, rx_ring + ring_offs + 4, semi_count);
- memcpy(&(rxdata[semi_count]), rx_ring, rx_size-4-semi_count);
+ memcpy(&rxdata[semi_count], rx_ring,
+ rx_size - 4 - semi_count);
net_process_received_packet(rxdata, length);
debug_cond(DEBUG_RX, "rx packet %d+%d bytes",
- semi_count, rx_size-4-semi_count);
+ semi_count, rx_size - 4 - semi_count);
} else {
net_process_received_packet(rx_ring + ring_offs + 4, length);
- debug_cond(DEBUG_RX, "rx packet %d bytes", rx_size-4);
+ debug_cond(DEBUG_RX, "rx packet %d bytes", rx_size - 4);
}
flush_cache((unsigned long)rx_ring, RX_BUF_LEN);
- cur_rx = (cur_rx + rx_size + 4 + 3) & ~3;
+ cur_rx = ROUND(cur_rx + rx_size + 4, 4);
outw(cur_rx - 16, ioaddr + RTL_REG_RXBUFPTR);
- /* See RTL8139 Programming Guide V0.1 for the official handling of
- * Rx overflow situations. The document itself contains basically no
- * usable information, except for a few exception handling rules. */
- outw(status & (RTL_REG_INTRSTATUS_RXFIFOOVER |
- RTL_REG_INTRSTATUS_RXOVERFLOW |
- RTL_REG_INTRSTATUS_RXOK), ioaddr + RTL_REG_INTRSTATUS);
+ /*
+ * See RTL8139 Programming Guide V0.1 for the official handling of
+ * Rx overflow situations. The document itself contains basically
+ * no usable information, except for a few exception handling rules.
+ */
+ outw(status & rxstat, ioaddr + RTL_REG_INTRSTATUS);
+
return length;
}
--
2.25.1
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