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net: cadence_gem: Fix the queue address update during wrap around

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During wrap around and reset, queues are pointing to initial base
address of queue 0, irrespective of what queue we are dealing with.
Fix it by assigning proper base address every time.

Signed-off-by: Sai Pavan Boddu <sai.pavan.boddu@xilinx.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Sai Pavan Boddu 2020-05-12 20:24:44 +05:30 committed by Jason Wang
parent 6fe7661d3d
commit 96ea126a8d
1 changed files with 33 additions and 4 deletions
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37
hw/net/cadence_gem.c
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@ -845,6 +845,35 @@ static int get_queue_from_screen(CadenceGEMState *s, uint8_t *rxbuf_ptr,
return 0;
}
static uint32_t gem_get_queue_base_addr(CadenceGEMState *s, bool tx, int q)
{
uint32_t base_addr = 0;
switch (q) {
case 0:
base_addr = s->regs[tx ? GEM_TXQBASE : GEM_RXQBASE];
break;
case 1 ... (MAX_PRIORITY_QUEUES - 1):
base_addr = s->regs[(tx ? GEM_TRANSMIT_Q1_PTR :
GEM_RECEIVE_Q1_PTR) + q - 1];
break;
default:
g_assert_not_reached();
};
return base_addr;
}
static inline uint32_t gem_get_tx_queue_base_addr(CadenceGEMState *s, int q)
{
return gem_get_queue_base_addr(s, true, q);
}
static inline uint32_t gem_get_rx_queue_base_addr(CadenceGEMState *s, int q)
{
return gem_get_queue_base_addr(s, false, q);
}
static hwaddr gem_get_desc_addr(CadenceGEMState *s, bool tx, int q)
{
hwaddr desc_addr = 0;
@ -1043,7 +1072,7 @@ static ssize_t gem_receive(NetClientState *nc, const uint8_t *buf, size_t size)
/* Next descriptor */
if (rx_desc_get_wrap(s->rx_desc[q])) {
DB_PRINT("wrapping RX descriptor list\n");
s->rx_desc_addr[q] = s->regs[GEM_RXQBASE];
s->rx_desc_addr[q] = gem_get_rx_queue_base_addr(s, q);
} else {
DB_PRINT("incrementing RX descriptor list\n");
s->rx_desc_addr[q] += 4 * gem_get_desc_len(s, true);
@ -1199,7 +1228,7 @@ static void gem_transmit(CadenceGEMState *s)
sizeof(desc_first));
/* Advance the hardware current descriptor past this packet */
if (tx_desc_get_wrap(desc)) {
s->tx_desc_addr[q] = s->regs[GEM_TXQBASE];
s->tx_desc_addr[q] = gem_get_tx_queue_base_addr(s, q);
} else {
s->tx_desc_addr[q] = packet_desc_addr +
4 * gem_get_desc_len(s, false);
@ -1251,7 +1280,7 @@ static void gem_transmit(CadenceGEMState *s)
} else {
packet_desc_addr = 0;
}
packet_desc_addr |= s->regs[GEM_TXQBASE];
packet_desc_addr |= gem_get_tx_queue_base_addr(s, q);
} else {
packet_desc_addr += 4 * gem_get_desc_len(s, false);
}
@ -1457,7 +1486,7 @@ static void gem_write(void *opaque, hwaddr offset, uint64_t val,
if (!(val & GEM_NWCTRL_TXENA)) {
/* Reset to start of Q when transmit disabled. */
for (i = 0; i < s->num_priority_queues; i++) {
s->tx_desc_addr[i] = s->regs[GEM_TXQBASE];
s->tx_desc_addr[i] = gem_get_tx_queue_base_addr(s, i);
}
}
if (gem_can_receive(qemu_get_queue(s->nic))) {