Enable 32-bit or 64-bit DMA in the macb driver based on the macb hardware compatibility and it is configured with structure macb_config in the driver.
The Microchip PolarFire SoC Memory Protection Unit(MPU) gives the 64-bit DMA access with the GEM, the MPU transactions on the AXI bus is 64-bit not 32-bit So 64-bit DMA is enabled for the Microchip PolarFire SoC GEM.
Signed-off-by: Padmarao Begari padmarao.begari@microchip.com Reviewed-by: Anup Patel anup.patel@wdc.com --- drivers/net/macb.c | 131 +++++++++++++++++++++++++++++++++++++++------ drivers/net/macb.h | 6 +++ 2 files changed, 120 insertions(+), 17 deletions(-)
diff --git a/drivers/net/macb.c b/drivers/net/macb.c index b80a259ff7..626ee49227 100644 --- a/drivers/net/macb.c +++ b/drivers/net/macb.c @@ -83,7 +83,16 @@ struct macb_dma_desc { u32 ctrl; };
-#define DMA_DESC_BYTES(n) (n * sizeof(struct macb_dma_desc)) +struct macb_dma_desc_64 { + u32 addrh; + u32 unused; +}; + +#define HW_DMA_CAP_32B 0 +#define HW_DMA_CAP_64B 1 + +#define DMA_DESC_SIZE 16 +#define DMA_DESC_BYTES(n) ((n) * DMA_DESC_SIZE) #define MACB_TX_DMA_DESC_SIZE (DMA_DESC_BYTES(MACB_TX_RING_SIZE)) #define MACB_RX_DMA_DESC_SIZE (DMA_DESC_BYTES(MACB_RX_RING_SIZE)) #define MACB_TX_DUMMY_DMA_DESC_SIZE (DMA_DESC_BYTES(1)) @@ -137,6 +146,7 @@ struct macb_device {
struct macb_config { unsigned int dma_burst_length; + unsigned int hw_dma_cap;
int (*clk_init)(struct udevice *dev, ulong rate); }; @@ -307,6 +317,24 @@ static inline void macb_invalidate_rx_buffer(struct macb_device *macb)
#if defined(CONFIG_CMD_NET)
+static struct macb_dma_desc_64 *macb_64b_desc(struct macb_dma_desc *desc) +{ + return (struct macb_dma_desc_64 *)((void *)desc + + sizeof(struct macb_dma_desc)); +} + +static void macb_set_addr(struct macb_device *macb, struct macb_dma_desc *desc, + ulong addr) +{ + struct macb_dma_desc_64 *desc_64; + + if (macb->config->hw_dma_cap & HW_DMA_CAP_64B) { + desc_64 = macb_64b_desc(desc); + desc_64->addrh = upper_32_bits(addr); + } + desc->addr = lower_32_bits(addr); +} + static int _macb_send(struct macb_device *macb, const char *name, void *packet, int length) { @@ -325,8 +353,12 @@ static int _macb_send(struct macb_device *macb, const char *name, void *packet, macb->tx_head++; }
+ if (macb->config->hw_dma_cap & HW_DMA_CAP_64B) + tx_head = tx_head * 2; + macb->tx_ring[tx_head].ctrl = ctrl; - macb->tx_ring[tx_head].addr = paddr; + macb_set_addr(macb, &macb->tx_ring[tx_head], paddr); + barrier(); macb_flush_ring_desc(macb, TX); macb_writel(macb, NCR, MACB_BIT(TE) | MACB_BIT(RE) | MACB_BIT(TSTART)); @@ -363,19 +395,28 @@ static void reclaim_rx_buffers(struct macb_device *macb, unsigned int new_tail) { unsigned int i; + unsigned int count;
i = macb->rx_tail;
macb_invalidate_ring_desc(macb, RX); while (i > new_tail) { - macb->rx_ring[i].addr &= ~MACB_BIT(RX_USED); + if (macb->config->hw_dma_cap & HW_DMA_CAP_64B) + count = i * 2; + else + count = i; + macb->rx_ring[count].addr &= ~MACB_BIT(RX_USED); i++; if (i > MACB_RX_RING_SIZE) i = 0; }
while (i < new_tail) { - macb->rx_ring[i].addr &= ~MACB_BIT(RX_USED); + if (macb->config->hw_dma_cap & HW_DMA_CAP_64B) + count = i * 2; + else + count = i; + macb->rx_ring[count].addr &= ~MACB_BIT(RX_USED); i++; }
@@ -390,16 +431,25 @@ static int _macb_recv(struct macb_device *macb, uchar **packetp) void *buffer; int length; u32 status; + u8 flag = false;
macb->wrapped = false; for (;;) { macb_invalidate_ring_desc(macb, RX);
+ if (macb->config->hw_dma_cap & HW_DMA_CAP_64B) + next_rx_tail = next_rx_tail * 2; + if (!(macb->rx_ring[next_rx_tail].addr & MACB_BIT(RX_USED))) return -EAGAIN;
status = macb->rx_ring[next_rx_tail].ctrl; if (status & MACB_BIT(RX_SOF)) { + if (macb->config->hw_dma_cap & HW_DMA_CAP_64B) { + next_rx_tail = next_rx_tail / 2; + flag = true; + } + if (next_rx_tail != macb->rx_tail) reclaim_rx_buffers(macb, next_rx_tail); macb->wrapped = false; @@ -426,11 +476,22 @@ static int _macb_recv(struct macb_device *macb, uchar **packetp) *packetp = buffer; }
+ if (macb->config->hw_dma_cap & HW_DMA_CAP_64B) { + if (!flag) + next_rx_tail = next_rx_tail / 2; + } + if (++next_rx_tail >= MACB_RX_RING_SIZE) next_rx_tail = 0; macb->next_rx_tail = next_rx_tail; return length; } else { + if (macb->config->hw_dma_cap & HW_DMA_CAP_64B) { + if (!flag) + next_rx_tail = next_rx_tail / 2; + flag = false; + } + if (++next_rx_tail >= MACB_RX_RING_SIZE) { macb->wrapped = true; next_rx_tail = 0; @@ -718,6 +779,7 @@ static int gmac_init_multi_queues(struct macb_device *macb) { int i, num_queues = 1; u32 queue_mask; + unsigned long paddr;
/* bit 0 is never set but queue 0 always exists */ queue_mask = gem_readl(macb, DCFG6) & 0xff; @@ -731,10 +793,18 @@ static int gmac_init_multi_queues(struct macb_device *macb) macb->dummy_desc->addr = 0; flush_dcache_range(macb->dummy_desc_dma, macb->dummy_desc_dma + ALIGN(MACB_TX_DUMMY_DMA_DESC_SIZE, PKTALIGN)); - - for (i = 1; i < num_queues; i++) - gem_writel_queue_TBQP(macb, macb->dummy_desc_dma, i - 1); - + paddr = macb->dummy_desc_dma; + + for (i = 1; i < num_queues; i++) { + gem_writel_queue_TBQP(macb, lower_32_bits(paddr), i - 1); + gem_writel_queue_RBQP(macb, lower_32_bits(paddr), i - 1); + if (macb->config->hw_dma_cap & HW_DMA_CAP_64B) { + gem_writel_queue_TBQPH(macb, upper_32_bits(paddr), + i - 1); + gem_writel_queue_RBQPH(macb, upper_32_bits(paddr), + i - 1); + } + } return 0; }
@@ -760,6 +830,9 @@ static void gmac_configure_dma(struct macb_device *macb) dmacfg &= ~GEM_BIT(ENDIA_DESC);
dmacfg &= ~GEM_BIT(ADDR64); + if (macb->config->hw_dma_cap & HW_DMA_CAP_64B) + dmacfg |= GEM_BIT(ADDR64); + gem_writel(macb, DMACFG, dmacfg); }
@@ -775,6 +848,7 @@ static int _macb_init(struct macb_device *macb, const char *name) unsigned long paddr; int ret; int i; + int count;
/* * macb_halt should have been called at some point before now, @@ -786,20 +860,28 @@ static int _macb_init(struct macb_device *macb, const char *name) for (i = 0; i < MACB_RX_RING_SIZE; i++) { if (i == (MACB_RX_RING_SIZE - 1)) paddr |= MACB_BIT(RX_WRAP); - macb->rx_ring[i].addr = paddr; - macb->rx_ring[i].ctrl = 0; + if (macb->config->hw_dma_cap & HW_DMA_CAP_64B) + count = i * 2; + else + count = i; + macb->rx_ring[count].ctrl = 0; + macb_set_addr(macb, &macb->rx_ring[count], paddr); paddr += macb->rx_buffer_size; } macb_flush_ring_desc(macb, RX); macb_flush_rx_buffer(macb);
for (i = 0; i < MACB_TX_RING_SIZE; i++) { - macb->tx_ring[i].addr = 0; + if (macb->config->hw_dma_cap & HW_DMA_CAP_64B) + count = i * 2; + else + count = i; + macb_set_addr(macb, &macb->tx_ring[count], 0); if (i == (MACB_TX_RING_SIZE - 1)) - macb->tx_ring[i].ctrl = MACB_BIT(TX_USED) | + macb->tx_ring[count].ctrl = MACB_BIT(TX_USED) | MACB_BIT(TX_WRAP); else - macb->tx_ring[i].ctrl = MACB_BIT(TX_USED); + macb->tx_ring[count].ctrl = MACB_BIT(TX_USED); } macb_flush_ring_desc(macb, TX);
@@ -812,8 +894,12 @@ static int _macb_init(struct macb_device *macb, const char *name) gem_writel(macb, DMACFG, MACB_ZYNQ_GEM_DMACR_INIT); #endif
- macb_writel(macb, RBQP, macb->rx_ring_dma); - macb_writel(macb, TBQP, macb->tx_ring_dma); + macb_writel(macb, RBQP, lower_32_bits(macb->rx_ring_dma)); + macb_writel(macb, TBQP, lower_32_bits(macb->tx_ring_dma)); + if (macb->config->hw_dma_cap & HW_DMA_CAP_64B) { + macb_writel(macb, RBQPH, upper_32_bits(macb->rx_ring_dma)); + macb_writel(macb, TBQPH, upper_32_bits(macb->tx_ring_dma)); + }
if (macb_is_gem(macb)) { /* Initialize DMA properties */ @@ -1217,6 +1303,7 @@ static int macb_enable_clk(struct udevice *dev)
static const struct macb_config default_gem_config = { .dma_burst_length = 16, + .hw_dma_cap = HW_DMA_CAP_32B, .clk_init = NULL, };
@@ -1227,8 +1314,8 @@ static int macb_eth_probe(struct udevice *dev) const char *phy_mode; int ret;
- phy_mode = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), "phy-mode", - NULL); + phy_mode = dev_read_prop(dev, "phy-mode", NULL); + if (phy_mode) macb->phy_interface = phy_get_interface_by_name(phy_mode); if (macb->phy_interface == -1) { @@ -1304,13 +1391,21 @@ static int macb_eth_ofdata_to_platdata(struct udevice *dev) return macb_late_eth_ofdata_to_platdata(dev); }
+static const struct macb_config microchip_config = { + .dma_burst_length = 16, + .hw_dma_cap = HW_DMA_CAP_64B, + .clk_init = NULL, +}; + static const struct macb_config sama5d4_config = { .dma_burst_length = 4, + .hw_dma_cap = HW_DMA_CAP_32B, .clk_init = NULL, };
static const struct macb_config sifive_config = { .dma_burst_length = 16, + .hw_dma_cap = HW_DMA_CAP_32B, .clk_init = macb_sifive_clk_init, };
@@ -1324,6 +1419,8 @@ static const struct udevice_id macb_eth_ids[] = { { .compatible = "cdns,zynq-gem" }, { .compatible = "sifive,fu540-c000-gem", .data = (ulong)&sifive_config }, + { .compatible = "microchip,mpfs-mss-gem", + .data = (ulong)µchip_config }, { } };
diff --git a/drivers/net/macb.h b/drivers/net/macb.h index 9b16383eba..72b84ae96e 100644 --- a/drivers/net/macb.h +++ b/drivers/net/macb.h @@ -768,5 +768,11 @@ #define GEM_RX_CSUM_CHECKED_MASK 2 #define gem_writel_queue_TBQP(port, value, queue_num) \ writel((value), (port)->regs + GEM_TBQP(queue_num)) +#define gem_writel_queue_TBQPH(port, value, queue_num) \ + writel((value), (port)->regs + GEM_TBQPH(queue_num)) +#define gem_writel_queue_RBQP(port, value, queue_num) \ + writel((value), (port)->regs + GEM_RBQP(queue_num)) +#define gem_writel_queue_RBQPH(port, value, queue_num) \ + writel((value), (port)->regs + GEM_RBQPH(queue_num))
#endif /* __DRIVERS_MACB_H__ */