set_maxframe is called when the MTU of interface is configured, which
limits the size of packet passed through PPE.
Signed-off-by: Luo Jie <quic_luoj@quicinc.com>
---
drivers/net/ethernet/qualcomm/ppe/ppe.c | 41 +++++++++++++++++++++++++
include/linux/soc/qcom/ppe.h | 12 ++++++++
2 files changed, 53 insertions(+)
@@ -12,6 +12,7 @@
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/platform_device.h>
+#include <linux/if_ether.h>
#include <linux/soc/qcom/ppe.h>
#include "ppe.h"
#include "ppe_regs.h"
@@ -293,6 +294,45 @@ struct ppe_device *ppe_dev_get(struct platform_device *pdev)
}
EXPORT_SYMBOL_GPL(ppe_dev_get);
+struct ppe_device_ops *ppe_ops_get(struct platform_device *pdev)
+{
+ struct ppe_device *ppe_dev = platform_get_drvdata(pdev);
+
+ if (!ppe_dev)
+ return NULL;
+
+ return ppe_dev->ppe_ops;
+}
+EXPORT_SYMBOL_GPL(ppe_ops_get);
+
+static int ppe_port_maxframe_set(struct ppe_device *ppe_dev,
+ int port, int maxframe_size)
+{
+ union ppe_mru_mtu_ctrl_cfg_u mru_mtu_cfg;
+
+ /* The max frame size should be MTU added by ETH_HLEN in PPE */
+ maxframe_size += ETH_HLEN;
+
+ if (port < PPE_MC_MTU_CTRL_TBL_NUM)
+ ppe_mask(ppe_dev, PPE_MC_MTU_CTRL_TBL + PPE_MC_MTU_CTRL_TBL_INC * port,
+ PPE_MC_MTU_CTRL_TBL_MTU,
+ FIELD_PREP(PPE_MC_MTU_CTRL_TBL_MTU, maxframe_size));
+
+ memset(&mru_mtu_cfg, 0, sizeof(mru_mtu_cfg));
+ ppe_read_tbl(ppe_dev, PPE_MRU_MTU_CTRL_TBL + PPE_MRU_MTU_CTRL_TBL_INC * port,
+ mru_mtu_cfg.val, sizeof(mru_mtu_cfg.val));
+
+ mru_mtu_cfg.bf.mru = maxframe_size;
+ mru_mtu_cfg.bf.mtu = maxframe_size;
+
+ return ppe_write_tbl(ppe_dev, PPE_MRU_MTU_CTRL_TBL + PPE_MRU_MTU_CTRL_TBL_INC * port,
+ mru_mtu_cfg.val, sizeof(mru_mtu_cfg.val));
+}
+
+static struct ppe_device_ops qcom_ppe_ops = {
+ .set_maxframe = ppe_port_maxframe_set,
+};
+
static const struct regmap_range ppe_readable_ranges[] = {
regmap_reg_range(0x0, 0x1FF), /* GLB */
regmap_reg_range(0x400, 0x5FF), /* LPI CSR */
@@ -1286,6 +1326,7 @@ static int qcom_ppe_probe(struct platform_device *pdev)
ret,
"ppe device hw init failed\n");
+ ppe_dev->ppe_ops = &qcom_ppe_ops;
ppe_dev->is_ppe_probed = true;
return 0;
}
@@ -16,13 +16,25 @@
struct ppe_device {
struct device *dev;
struct regmap *regmap;
+ struct ppe_device_ops *ppe_ops;
bool is_ppe_probed;
void *ppe_priv;
};
+/* PPE operations, which is used by the external driver like Ethernet
+ * DMA driver to configure PPE.
+ */
+struct ppe_device_ops {
+ int (*set_maxframe)(struct ppe_device *ppe_dev, int port,
+ int maxframe_size);
+};
+
/* Function used to check PPE platform dirver is registered correctly or not. */
bool ppe_is_probed(struct platform_device *pdev);
/* Function used to get the PPE device */
struct ppe_device *ppe_dev_get(struct platform_device *pdev);
+
+/* Function used to get the operations of PPE device */
+struct ppe_device_ops *ppe_ops_get(struct platform_device *pdev);
#endif