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net: ethernet: ti: am65-cpsw: enable hw auto ageing 

The AM65x ALE supports HW auto-ageing which can be enabled by programming
ageing interval in ALE_AGING_TIMER register. For this CPSW fck_clk
frequency has to be know by ALE.

This patch extends cpsw_ale_params with bus_freq field and enables ALE HW
auto ageing for AM65x CPSW2G ALE version.

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Grygorii Strashko 2020-09-10 23:28:05 +03:00 committed by David S. Miller
parent 186f5c99b0
commit 23015ff1a0
4 changed files with 70 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/net/ethernet/ti/am65-cpsw-nuss.c
View File

@ -5,6 +5,7 @@
*
*/
#include <linux/clk.h>
#include <linux/etherdevice.h>
#include <linux/if_vlan.h>
#include <linux/interrupt.h>
@ -2038,6 +2039,7 @@ static int am65_cpsw_nuss_probe(struct platform_device *pdev)
struct am65_cpsw_common *common;
struct device_node *node;
struct resource *res;
struct clk *clk;
int ret, i;
common = devm_kzalloc(dev, sizeof(struct am65_cpsw_common), GFP_KERNEL);
@ -2086,6 +2088,16 @@ static int am65_cpsw_nuss_probe(struct platform_device *pdev)
if (!common->ports)
return -ENOMEM;
clk = devm_clk_get(dev, "fck");
if (IS_ERR(clk)) {
ret = PTR_ERR(clk);
if (ret != -EPROBE_DEFER)
dev_err(dev, "error getting fck clock %d\n", ret);
return ret;
}
common->bus_freq = clk_get_rate(clk);
pm_runtime_enable(dev);
ret = pm_runtime_get_sync(dev);
if (ret < 0) {
@ -2134,6 +2146,7 @@ static int am65_cpsw_nuss_probe(struct platform_device *pdev)
ale_params.ale_ports = common->port_num + 1;
ale_params.ale_regs = common->cpsw_base + AM65_CPSW_NU_ALE_BASE;
ale_params.dev_id = "am65x-cpsw2g";
ale_params.bus_freq = common->bus_freq;
common->ale = cpsw_ale_create(&ale_params);
if (IS_ERR(common->ale)) {

1
drivers/net/ethernet/ti/am65-cpsw-nuss.h
View File

@ -106,6 +106,7 @@ struct am65_cpsw_common {
u32 nuss_ver;
u32 cpsw_ver;
unsigned long bus_freq;
bool pf_p0_rx_ptype_rrobin;
struct am65_cpts *cpts;
int est_enabled;

61
drivers/net/ethernet/ti/cpsw_ale.c
View File

@ -32,6 +32,7 @@
#define ALE_STATUS 0x04
#define ALE_CONTROL 0x08
#define ALE_PRESCALE 0x10
#define ALE_AGING_TIMER 0x14
#define ALE_UNKNOWNVLAN 0x18
#define ALE_TABLE_CONTROL 0x20
#define ALE_TABLE 0x34
@ -46,6 +47,9 @@
#define AM65_CPSW_ALE_THREAD_DEF_REG 0x134
/* ALE_AGING_TIMER */
#define ALE_AGING_TIMER_MASK GENMASK(23, 0)
enum {
CPSW_ALE_F_STATUS_REG = BIT(0), /* Status register present */
CPSW_ALE_F_HW_AUTOAGING = BIT(1), /* HW auto aging */
@ -982,21 +986,66 @@ static void cpsw_ale_timer(struct timer_list *t)
}
}
static void cpsw_ale_hw_aging_timer_start(struct cpsw_ale *ale)
{
u32 aging_timer;
aging_timer = ale->params.bus_freq / 1000000;
aging_timer *= ale->params.ale_ageout;
if (aging_timer & ~ALE_AGING_TIMER_MASK) {
aging_timer = ALE_AGING_TIMER_MASK;
dev_warn(ale->params.dev,
"ALE aging timer overflow, set to max\n");
}
writel(aging_timer, ale->params.ale_regs + ALE_AGING_TIMER);
}
static void cpsw_ale_hw_aging_timer_stop(struct cpsw_ale *ale)
{
writel(0, ale->params.ale_regs + ALE_AGING_TIMER);
}
static void cpsw_ale_aging_start(struct cpsw_ale *ale)
{
if (!ale->params.ale_ageout)
return;
if (ale->features & CPSW_ALE_F_HW_AUTOAGING) {
cpsw_ale_hw_aging_timer_start(ale);
return;
}
timer_setup(&ale->timer, cpsw_ale_timer, 0);
ale->timer.expires = jiffies + ale->ageout;
add_timer(&ale->timer);
}
static void cpsw_ale_aging_stop(struct cpsw_ale *ale)
{
if (!ale->params.ale_ageout)
return;
if (ale->features & CPSW_ALE_F_HW_AUTOAGING) {
cpsw_ale_hw_aging_timer_stop(ale);
return;
}
del_timer_sync(&ale->timer);
}
void cpsw_ale_start(struct cpsw_ale *ale)
{
cpsw_ale_control_set(ale, 0, ALE_ENABLE, 1);
cpsw_ale_control_set(ale, 0, ALE_CLEAR, 1);
timer_setup(&ale->timer, cpsw_ale_timer, 0);
if (ale->ageout) {
ale->timer.expires = jiffies + ale->ageout;
add_timer(&ale->timer);
}
cpsw_ale_aging_start(ale);
}
void cpsw_ale_stop(struct cpsw_ale *ale)
{
del_timer_sync(&ale->timer);
cpsw_ale_aging_stop(ale);
cpsw_ale_control_set(ale, 0, ALE_CLEAR, 1);
cpsw_ale_control_set(ale, 0, ALE_ENABLE, 0);
}

1
drivers/net/ethernet/ti/cpsw_ale.h
View File

@ -25,6 +25,7 @@ struct cpsw_ale_params {
*/
u32 major_ver_mask;
const char *dev_id;
unsigned long bus_freq;
};
struct cpsw_ale {