From 96ea126a8deef30cc81519fb3cb50bf3d65eb6aa Mon Sep 17 00:00:00 2001 From: Sai Pavan Boddu Date: Tue, 12 May 2020 20:24:44 +0530 Subject: net: cadence_gem: Fix the queue address update during wrap around 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 Reviewed-by: Edgar E. Iglesias Signed-off-by: Jason Wang --- hw/net/cadence_gem.c | 37 +++++++++++++++++++++++++++++++++---- 1 file changed, 33 insertions(+), 4 deletions(-) (limited to 'hw') diff --git a/hw/net/cadence_gem.c b/hw/net/cadence_gem.c index 2e273dca..fd3e4a8 100644 --- a/hw/net/cadence_gem.c +++ b/hw/net/cadence_gem.c @@ -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))) { -- cgit v1.1