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path: root/drivers/net/ethernet/cadence/macb_main.c
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Diffstat (limited to 'drivers/net/ethernet/cadence/macb_main.c')
-rw-r--r--drivers/net/ethernet/cadence/macb_main.c143
1 files changed, 134 insertions, 9 deletions
diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index 262a28ff81fc..5ca17e62dc3e 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -7,6 +7,7 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/clk.h>
+#include <linux/clk-provider.h>
#include <linux/crc32.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
@@ -37,6 +38,13 @@
#include <linux/pm_runtime.h>
#include "macb.h"
+/* This structure is only used for MACB on SiFive FU540 devices */
+struct sifive_fu540_macb_mgmt {
+ void __iomem *reg;
+ unsigned long rate;
+ struct clk_hw hw;
+};
+
#define MACB_RX_BUFFER_SIZE 128
#define RX_BUFFER_MULTIPLE 64 /* bytes */
@@ -981,7 +989,8 @@ static void discard_partial_frame(struct macb_queue *queue, unsigned int begin,
*/
}
-static int gem_rx(struct macb_queue *queue, int budget)
+static int gem_rx(struct macb_queue *queue, struct napi_struct *napi,
+ int budget)
{
struct macb *bp = queue->bp;
unsigned int len;
@@ -1063,7 +1072,7 @@ static int gem_rx(struct macb_queue *queue, int budget)
skb->data, 32, true);
#endif
- netif_receive_skb(skb);
+ napi_gro_receive(napi, skb);
}
gem_rx_refill(queue);
@@ -1071,8 +1080,8 @@ static int gem_rx(struct macb_queue *queue, int budget)
return count;
}
-static int macb_rx_frame(struct macb_queue *queue, unsigned int first_frag,
- unsigned int last_frag)
+static int macb_rx_frame(struct macb_queue *queue, struct napi_struct *napi,
+ unsigned int first_frag, unsigned int last_frag)
{
unsigned int len;
unsigned int frag;
@@ -1148,7 +1157,7 @@ static int macb_rx_frame(struct macb_queue *queue, unsigned int first_frag,
bp->dev->stats.rx_bytes += skb->len;
netdev_vdbg(bp->dev, "received skb of length %u, csum: %08x\n",
skb->len, skb->csum);
- netif_receive_skb(skb);
+ napi_gro_receive(napi, skb);
return 0;
}
@@ -1171,7 +1180,8 @@ static inline void macb_init_rx_ring(struct macb_queue *queue)
queue->rx_tail = 0;
}
-static int macb_rx(struct macb_queue *queue, int budget)
+static int macb_rx(struct macb_queue *queue, struct napi_struct *napi,
+ int budget)
{
struct macb *bp = queue->bp;
bool reset_rx_queue = false;
@@ -1208,7 +1218,7 @@ static int macb_rx(struct macb_queue *queue, int budget)
continue;
}
- dropped = macb_rx_frame(queue, first_frag, tail);
+ dropped = macb_rx_frame(queue, napi, first_frag, tail);
first_frag = -1;
if (unlikely(dropped < 0)) {
reset_rx_queue = true;
@@ -1262,7 +1272,7 @@ static int macb_poll(struct napi_struct *napi, int budget)
netdev_vdbg(bp->dev, "poll: status = %08lx, budget = %d\n",
(unsigned long)status, budget);
- work_done = bp->macbgem_ops.mog_rx(queue, budget);
+ work_done = bp->macbgem_ops.mog_rx(queue, napi, budget);
if (work_done < budget) {
napi_complete_done(napi, work_done);
@@ -3477,7 +3487,7 @@ static int macb_init(struct platform_device *pdev)
queue = &bp->queues[q];
queue->bp = bp;
- netif_napi_add(dev, &queue->napi, macb_poll, 64);
+ netif_napi_add(dev, &queue->napi, macb_poll, NAPI_POLL_WEIGHT);
if (hw_q) {
queue->ISR = GEM_ISR(hw_q - 1);
queue->IER = GEM_IER(hw_q - 1);
@@ -3616,6 +3626,8 @@ static int macb_init(struct platform_device *pdev)
/* max number of receive buffers */
#define AT91ETHER_MAX_RX_DESCR 9
+static struct sifive_fu540_macb_mgmt *mgmt;
+
/* Initialize and start the Receiver and Transmit subsystems */
static int at91ether_start(struct net_device *dev)
{
@@ -3943,6 +3955,116 @@ static int at91ether_init(struct platform_device *pdev)
return 0;
}
+static unsigned long fu540_macb_tx_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ return mgmt->rate;
+}
+
+static long fu540_macb_tx_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ if (WARN_ON(rate < 2500000))
+ return 2500000;
+ else if (rate == 2500000)
+ return 2500000;
+ else if (WARN_ON(rate < 13750000))
+ return 2500000;
+ else if (WARN_ON(rate < 25000000))
+ return 25000000;
+ else if (rate == 25000000)
+ return 25000000;
+ else if (WARN_ON(rate < 75000000))
+ return 25000000;
+ else if (WARN_ON(rate < 125000000))
+ return 125000000;
+ else if (rate == 125000000)
+ return 125000000;
+
+ WARN_ON(rate > 125000000);
+
+ return 125000000;
+}
+
+static int fu540_macb_tx_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ rate = fu540_macb_tx_round_rate(hw, rate, &parent_rate);
+ if (rate != 125000000)
+ iowrite32(1, mgmt->reg);
+ else
+ iowrite32(0, mgmt->reg);
+ mgmt->rate = rate;
+
+ return 0;
+}
+
+static const struct clk_ops fu540_c000_ops = {
+ .recalc_rate = fu540_macb_tx_recalc_rate,
+ .round_rate = fu540_macb_tx_round_rate,
+ .set_rate = fu540_macb_tx_set_rate,
+};
+
+static int fu540_c000_clk_init(struct platform_device *pdev, struct clk **pclk,
+ struct clk **hclk, struct clk **tx_clk,
+ struct clk **rx_clk, struct clk **tsu_clk)
+{
+ struct clk_init_data init;
+ int err = 0;
+
+ err = macb_clk_init(pdev, pclk, hclk, tx_clk, rx_clk, tsu_clk);
+ if (err)
+ return err;
+
+ mgmt = devm_kzalloc(&pdev->dev, sizeof(*mgmt), GFP_KERNEL);
+ if (!mgmt)
+ return -ENOMEM;
+
+ init.name = "sifive-gemgxl-mgmt";
+ init.ops = &fu540_c000_ops;
+ init.flags = 0;
+ init.num_parents = 0;
+
+ mgmt->rate = 0;
+ mgmt->hw.init = &init;
+
+ *tx_clk = clk_register(NULL, &mgmt->hw);
+ if (IS_ERR(*tx_clk))
+ return PTR_ERR(*tx_clk);
+
+ err = clk_prepare_enable(*tx_clk);
+ if (err)
+ dev_err(&pdev->dev, "failed to enable tx_clk (%u)\n", err);
+ else
+ dev_info(&pdev->dev, "Registered clk switch '%s'\n", init.name);
+
+ return 0;
+}
+
+static int fu540_c000_init(struct platform_device *pdev)
+{
+ struct resource *res;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (!res)
+ return -ENODEV;
+
+ mgmt->reg = ioremap(res->start, resource_size(res));
+ if (!mgmt->reg)
+ return -ENOMEM;
+
+ return macb_init(pdev);
+}
+
+static const struct macb_config fu540_c000_config = {
+ .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_JUMBO |
+ MACB_CAPS_GEM_HAS_PTP,
+ .dma_burst_length = 16,
+ .clk_init = fu540_c000_clk_init,
+ .init = fu540_c000_init,
+ .jumbo_max_len = 10240,
+};
+
static const struct macb_config at91sam9260_config = {
.caps = MACB_CAPS_USRIO_HAS_CLKEN | MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII,
.clk_init = macb_clk_init,
@@ -4032,6 +4154,7 @@ static const struct of_device_id macb_dt_ids[] = {
{ .compatible = "cdns,emac", .data = &emac_config },
{ .compatible = "cdns,zynqmp-gem", .data = &zynqmp_config},
{ .compatible = "cdns,zynq-gem", .data = &zynq_config },
+ { .compatible = "sifive,fu540-macb", .data = &fu540_c000_config },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, macb_dt_ids);
@@ -4239,6 +4362,7 @@ err_out_free_netdev:
err_disable_clocks:
clk_disable_unprepare(tx_clk);
+ clk_unregister(tx_clk);
clk_disable_unprepare(hclk);
clk_disable_unprepare(pclk);
clk_disable_unprepare(rx_clk);
@@ -4273,6 +4397,7 @@ static int macb_remove(struct platform_device *pdev)
pm_runtime_dont_use_autosuspend(&pdev->dev);
if (!pm_runtime_suspended(&pdev->dev)) {
clk_disable_unprepare(bp->tx_clk);
+ clk_unregister(bp->tx_clk);
clk_disable_unprepare(bp->hclk);
clk_disable_unprepare(bp->pclk);
clk_disable_unprepare(bp->rx_clk);
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-29 07:28:01 +0300