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minor performance improvements

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=> reducing the number of interrupts
This commit is contained in:
Stefan Lankes 2011-09-20 13:05:49 -07:00
parent 1ada6d15af
commit 1fabe449dd
2 changed files with 15 additions and 4 deletions
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18
drivers/net/rckemac.c
View file

@ -349,7 +349,7 @@ static void rckemacif_input(struct netif* netif, struct pbuf* p)
#endif /* PPPOE_SUPPORT */
/*
* This function is called in the context of the tcpip thread.
* Therefore, we are able to call directly the input functions
* Therefore, we are able to call directly the input functions.
*/
err = ethernet_input(p, netif);
if (err != ERR_OK) {
@ -501,6 +501,11 @@ rxDone:
if (read_offset != write_offset)
goto again;
/* Enable eMAC interrupt */
int tmp = *((volatile int*) (FPGA_BASE + IRQ_MASK + rckemacif->core * 2 * 4));
*((volatile int*) (FPGA_BASE + IRQ_MASK + rckemacif->core * 2 * 4)) = tmp & ~(1 << rckemacif->num_emac);
rckemacif->polling = 0;
}
/* this function is called in the context of the tcpip thread */
@ -528,8 +533,13 @@ static void rckemacif_handler(struct state* s)
/* check for updated write offset */
write_offset = *((volatile unsigned int*) (rckemacif->rx_buffer)) & 0xFFFF;
//write_offset = read_emac(rckemacif->num_emac, EMAC_RX_CONTROL + EMAC_RX_BUFFER_WRITE_OFFSET, rckemacif->core);
if ((write_offset != 0) && (rckemacif->rx_read_offset != write_offset)) {
if (tcpip_callback_with_block(rckemacif_poll, (void*) write_offset, 0) != ERR_OK) {
if ((write_offset != 0) && (rckemacif->rx_read_offset != write_offset) && !rckemacif->polling) {
if (tcpip_callback_with_block(rckemacif_poll, (void*) write_offset, 0) == ERR_OK) {
/* Maks eMAC interrupt */
int tmp = *((volatile int*) (FPGA_BASE + IRQ_MASK + rckemacif->core * 2 * 4));
*((volatile int*) (FPGA_BASE + IRQ_MASK + rckemacif->core * 2 * 4)) = tmp | (1 << rckemacif->num_emac);
rckemacif->polling = 1;
} else {
LWIP_DEBUGF(NETIF_DEBUG, ("rckemacif_handler: unable to send a poll request to the tcpip thread\n"));
}
}
@ -572,7 +582,7 @@ err_t rckemacif_init(struct netif* netif)
LWIP_DEBUGF(NETIF_DEBUG, ("rckemacif_init: out of memory\n"));
return ERR_MEM;
}
memset(rckemacif, 0, sizeof(rckemacif_t));
memset(rckemacif, 0x00, sizeof(rckemacif_t));
rckemacif->core = core;
/* allocate the receive buffer */

1
drivers/net/rckemac.h
View file

@ -39,6 +39,7 @@ typedef struct rckemacif {
void* irq_address;
uint32_t core;
uint32_t num_emac;
volatile uint8_t polling;
} rckemacif_t;
/*