Provide descriptors for second priority rx and tx queues and disable the
the queues if hardware is GEM. Otherwise the function macb_send() will run
into a timeout.
Signed-off-by: Thomas Haemmerle <thomas.haemmerle@xxxxxxxxxxxxxx>
---
drivers/net/macb.c | 21 +++++++++++++++++++++
drivers/net/macb.h | 2 ++
2 files changed, 23 insertions(+)
diff --git a/drivers/net/macb.c b/drivers/net/macb.c
index c129282..2a30457 100644
--- a/drivers/net/macb.c
+++ b/drivers/net/macb.c
@@ -46,9 +46,11 @@
#define RX_BUFFER_MULTIPLE 64 /* bytes */
#define RX_NB_PACKET 10
#define TX_RING_SIZE 2 /* must be power of 2 */
+#define GEM_Q1_DESCS 2
#define RX_RING_BYTES(bp) (sizeof(struct macb_dma_desc) * bp->rx_ring_size)
#define TX_RING_BYTES (sizeof(struct macb_dma_desc) * TX_RING_SIZE)
+#define GEM_Q1_DESC_BYTES (sizeof(struct macb_dma_desc) * GEM_Q1_DESCS)
struct macb_device {
void __iomem *regs;
@@ -60,6 +62,7 @@ struct macb_device {
void *tx_buffer;
struct macb_dma_desc *rx_ring;
struct macb_dma_desc *tx_ring;
+ struct macb_dma_desc *gem_q1_descs;
int rx_buffer_size;
int rx_ring_size;
@@ -340,6 +343,20 @@ static void macb_init(struct macb_device *macb)
macb_writel(macb, RBQP, (ulong)macb->rx_ring);
macb_writel(macb, TBQP, (ulong)macb->tx_ring);
+ if (macb->is_gem && macb->gem_q1_descs) {
+ /* Disable the second priority queue */
+ macb->gem_q1_descs[0].addr = 0;
+ macb->gem_q1_descs[0].ctrl = MACB_BIT(TX_WRAP) |
+ MACB_BIT(TX_LAST) |
+ MACB_BIT(TX_USED);
+ macb->gem_q1_descs[1].addr = MACB_BIT(RX_USED) |
+ MACB_BIT(RX_WRAP);
+ macb->gem_q1_descs[1].ctrl = 0;
+
+ gem_writel(macb, TQ1, (ulong)&macb->gem_q1_descs[0]);
+ gem_writel(macb, RQ1, (ulong)&macb->gem_q1_descs[1]);
+ }
+
switch(macb->interface) {
case PHY_INTERFACE_MODE_RGMII:
val = GEM_BIT(RGMII);
@@ -689,6 +706,10 @@ static int macb_probe(struct device_d *dev)
macb->rx_ring = dma_alloc_coherent(RX_RING_BYTES(macb), DMA_ADDRESS_BROKEN);
macb->tx_ring = dma_alloc_coherent(TX_RING_BYTES, DMA_ADDRESS_BROKEN);
+ if (macb->is_gem)
+ macb->gem_q1_descs = dma_alloc_coherent(GEM_Q1_DESC_BYTES,
+ DMA_ADDRESS_BROKEN);
+
macb_reset_hw(macb);
ncfgr = macb_mdc_clk_div(macb);
ncfgr |= MACB_BIT(PAE); /* PAuse Enable */
diff --git a/drivers/net/macb.h b/drivers/net/macb.h
index 6be9732..979f53c 100644
--- a/drivers/net/macb.h
+++ b/drivers/net/macb.h
@@ -72,6 +72,8 @@
#define GEM_DCFG5 0x0290
#define GEM_DCFG6 0x0294
#define GEM_DCFG7 0x0298
+#define GEM_TQ1 0x0440
+#define GEM_RQ1 0x0480
/* Bitfields in NCR */
#define MACB_LB_OFFSET 0
--
2.7.4
Thomas Hämmerle
Research and Development
Wolfvision GmbH
| 6833 Klaus | Austria
Tel: +43 5523 52250 | Mail: Thomas.Haemmerle@xxxxxxxxxxxxxx
Webpage: www.wolfvision.com | www.wolfvision.com/green
Firmenbuch / Commercial Register: FN283521v Feldkirch/Austria
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