Separate TX and RX DMA rings to make their handling slightly clearer. This is a preparatory patch for bulk RX descriptor flushing.
Signed-off-by: Marek Vasut marex@denx.de --- Cc: Joe Hershberger joe.hershberger@ni.com Cc: Patrice Chotard patrice.chotard@foss.st.com Cc: Patrick Delaunay patrick.delaunay@foss.st.com Cc: Ramon Fried rfried.dev@gmail.com Cc: Stephen Warren swarren@nvidia.com --- drivers/net/dwc_eth_qos.c | 33 ++++++++++++++++++++++----------- drivers/net/dwc_eth_qos.h | 3 ++- 2 files changed, 24 insertions(+), 12 deletions(-)
diff --git a/drivers/net/dwc_eth_qos.c b/drivers/net/dwc_eth_qos.c index 001b028fa13..dde2c183b06 100644 --- a/drivers/net/dwc_eth_qos.c +++ b/drivers/net/dwc_eth_qos.c @@ -75,9 +75,6 @@ */ static void *eqos_alloc_descs(struct eqos_priv *eqos, unsigned int num) { - eqos->desc_size = ALIGN(sizeof(struct eqos_desc), - (unsigned int)ARCH_DMA_MINALIGN); - return memalign(eqos->desc_size, num * eqos->desc_size); }
@@ -89,8 +86,8 @@ static void eqos_free_descs(void *descs) static struct eqos_desc *eqos_get_desc(struct eqos_priv *eqos, unsigned int num, bool rx) { - return eqos->descs + - ((rx ? EQOS_DESCRIPTORS_TX : 0) + num) * eqos->desc_size; + return (rx ? eqos->rx_descs : eqos->tx_descs) + + (num * eqos->desc_size); }
void eqos_inval_desc_generic(void *desc) @@ -1001,7 +998,8 @@ static int eqos_start(struct udevice *dev)
/* Set up descriptors */
- memset(eqos->descs, 0, eqos->desc_size * EQOS_DESCRIPTORS_NUM); + memset(eqos->tx_descs, 0, eqos->desc_size * EQOS_DESCRIPTORS_TX); + memset(eqos->rx_descs, 0, eqos->desc_size * EQOS_DESCRIPTORS_RX);
for (i = 0; i < EQOS_DESCRIPTORS_TX; i++) { struct eqos_desc *tx_desc = eqos_get_desc(eqos, i, false); @@ -1234,13 +1232,23 @@ static int eqos_probe_resources_core(struct udevice *dev)
debug("%s(dev=%p):\n", __func__, dev);
- eqos->descs = eqos_alloc_descs(eqos, EQOS_DESCRIPTORS_NUM); - if (!eqos->descs) { - debug("%s: eqos_alloc_descs() failed\n", __func__); + eqos->desc_size = ALIGN(sizeof(struct eqos_desc), + (unsigned int)ARCH_DMA_MINALIGN); + + eqos->tx_descs = eqos_alloc_descs(eqos, EQOS_DESCRIPTORS_TX); + if (!eqos->tx_descs) { + debug("%s: eqos_alloc_descs(tx) failed\n", __func__); ret = -ENOMEM; goto err; }
+ eqos->rx_descs = eqos_alloc_descs(eqos, EQOS_DESCRIPTORS_RX); + if (!eqos->rx_descs) { + debug("%s: eqos_alloc_descs(rx) failed\n", __func__); + ret = -ENOMEM; + goto err_free_tx_descs; + } + eqos->tx_dma_buf = memalign(EQOS_BUFFER_ALIGN, EQOS_MAX_PACKET_SIZE); if (!eqos->tx_dma_buf) { debug("%s: memalign(tx_dma_buf) failed\n", __func__); @@ -1276,7 +1284,9 @@ err_free_rx_dma_buf: err_free_tx_dma_buf: free(eqos->tx_dma_buf); err_free_descs: - eqos_free_descs(eqos->descs); + eqos_free_descs(eqos->rx_descs); +err_free_tx_descs: + eqos_free_descs(eqos->tx_descs); err:
debug("%s: returns %d\n", __func__, ret); @@ -1292,7 +1302,8 @@ static int eqos_remove_resources_core(struct udevice *dev) free(eqos->rx_pkt); free(eqos->rx_dma_buf); free(eqos->tx_dma_buf); - eqos_free_descs(eqos->descs); + eqos_free_descs(eqos->rx_descs); + eqos_free_descs(eqos->tx_descs);
debug("%s: OK\n", __func__); return 0; diff --git a/drivers/net/dwc_eth_qos.h b/drivers/net/dwc_eth_qos.h index b35e7742634..e3e43c86d11 100644 --- a/drivers/net/dwc_eth_qos.h +++ b/drivers/net/dwc_eth_qos.h @@ -264,7 +264,8 @@ struct eqos_priv { struct phy_device *phy; ofnode phy_of_node; u32 max_speed; - void *descs; + void *tx_descs; + void *rx_descs; int tx_desc_idx, rx_desc_idx; unsigned int desc_size; void *tx_dma_buf;