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Message-Id: <20240910-am65-cpsw-multi-rx-v4-2-077fa6403043@kernel.org>
Date: Tue, 10 Sep 2024 12:23:59 +0300
From: Roger Quadros <rogerq@...nel.org>
To: "David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>, Siddharth Vadapalli <s-vadapalli@...com>,
Julien Panis <jpanis@...libre.com>, Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
Jesper Dangaard Brouer <hawk@...nel.org>,
John Fastabend <john.fastabend@...il.com>
Cc: Simon Horman <horms@...nel.org>, Andrew Lunn <andrew@...n.ch>,
Joe Damato <jdamato@...tly.com>, srk@...com, vigneshr@...com,
danishanwar@...com, pekka Varis <p-varis@...com>, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
bpf@...r.kernel.org, Roger Quadros <rogerq@...nel.org>
Subject: [PATCH net-next v4 2/6] net: ethernet: ti: cpsw_ale: use regfields
for ALE registers
Map the entire ALE registerspace using regmap.
Add regfields for Major and Minor Version fields.
Signed-off-by: Roger Quadros <rogerq@...nel.org>
Reviewed-by: Simon Horman <horms@...nel.org>
---
Changelog:
v4:
- reverse Xmas tree declaration order fixes
v3:
- added Reviewed-by Simon Horman
---
drivers/net/ethernet/ti/cpsw_ale.c | 84 ++++++++++++++++++++++++++++++--------
drivers/net/ethernet/ti/cpsw_ale.h | 17 ++++++--
2 files changed, 79 insertions(+), 22 deletions(-)
diff --git a/drivers/net/ethernet/ti/cpsw_ale.c b/drivers/net/ethernet/ti/cpsw_ale.c
index 64bf22cd860c..979f741a231d 100644
--- a/drivers/net/ethernet/ti/cpsw_ale.c
+++ b/drivers/net/ethernet/ti/cpsw_ale.c
@@ -10,6 +10,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
+#include <linux/regmap.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/err.h>
@@ -76,7 +77,7 @@ enum {
* @dev_id: ALE version/SoC id
* @features: features supported by ALE
* @tbl_entries: number of ALE entries
- * @major_ver_mask: mask of ALE Major Version Value in ALE_IDVER reg.
+ * @reg_fields: pointer to array of register field configuration
* @nu_switch_ale: NU Switch ALE
* @vlan_entry_tbl: ALE vlan entry fields description tbl
*/
@@ -84,7 +85,7 @@ struct cpsw_ale_dev_id {
const char *dev_id;
u32 features;
u32 tbl_entries;
- u32 major_ver_mask;
+ const struct reg_field *reg_fields;
bool nu_switch_ale;
const struct ale_entry_fld *vlan_entry_tbl;
};
@@ -1292,25 +1293,37 @@ void cpsw_ale_stop(struct cpsw_ale *ale)
cpsw_ale_control_set(ale, 0, ALE_ENABLE, 0);
}
+static const struct reg_field ale_fields_cpsw[] = {
+ /* CPSW_ALE_IDVER_REG */
+ [MINOR_VER] = REG_FIELD(ALE_IDVER, 0, 7),
+ [MAJOR_VER] = REG_FIELD(ALE_IDVER, 8, 15),
+};
+
+static const struct reg_field ale_fields_cpsw_nu[] = {
+ /* CPSW_ALE_IDVER_REG */
+ [MINOR_VER] = REG_FIELD(ALE_IDVER, 0, 7),
+ [MAJOR_VER] = REG_FIELD(ALE_IDVER, 8, 10),
+};
+
static const struct cpsw_ale_dev_id cpsw_ale_id_match[] = {
{
/* am3/4/5, dra7. dm814x, 66ak2hk-gbe */
.dev_id = "cpsw",
.tbl_entries = 1024,
- .major_ver_mask = 0xff,
+ .reg_fields = ale_fields_cpsw,
.vlan_entry_tbl = vlan_entry_cpsw,
},
{
/* 66ak2h_xgbe */
.dev_id = "66ak2h-xgbe",
.tbl_entries = 2048,
- .major_ver_mask = 0xff,
+ .reg_fields = ale_fields_cpsw,
.vlan_entry_tbl = vlan_entry_cpsw,
},
{
.dev_id = "66ak2el",
.features = CPSW_ALE_F_STATUS_REG,
- .major_ver_mask = 0x7,
+ .reg_fields = ale_fields_cpsw_nu,
.nu_switch_ale = true,
.vlan_entry_tbl = vlan_entry_nu,
},
@@ -1318,7 +1331,7 @@ static const struct cpsw_ale_dev_id cpsw_ale_id_match[] = {
.dev_id = "66ak2g",
.features = CPSW_ALE_F_STATUS_REG,
.tbl_entries = 64,
- .major_ver_mask = 0x7,
+ .reg_fields = ale_fields_cpsw_nu,
.nu_switch_ale = true,
.vlan_entry_tbl = vlan_entry_nu,
},
@@ -1326,20 +1339,20 @@ static const struct cpsw_ale_dev_id cpsw_ale_id_match[] = {
.dev_id = "am65x-cpsw2g",
.features = CPSW_ALE_F_STATUS_REG | CPSW_ALE_F_HW_AUTOAGING,
.tbl_entries = 64,
- .major_ver_mask = 0x7,
+ .reg_fields = ale_fields_cpsw_nu,
.nu_switch_ale = true,
.vlan_entry_tbl = vlan_entry_nu,
},
{
.dev_id = "j721e-cpswxg",
.features = CPSW_ALE_F_STATUS_REG | CPSW_ALE_F_HW_AUTOAGING,
- .major_ver_mask = 0x7,
+ .reg_fields = ale_fields_cpsw_nu,
.vlan_entry_tbl = vlan_entry_k3_cpswxg,
},
{
.dev_id = "am64-cpswxg",
.features = CPSW_ALE_F_STATUS_REG | CPSW_ALE_F_HW_AUTOAGING,
- .major_ver_mask = 0x7,
+ .reg_fields = ale_fields_cpsw_nu,
.vlan_entry_tbl = vlan_entry_k3_cpswxg,
.tbl_entries = 512,
},
@@ -1361,41 +1374,76 @@ cpsw_ale_dev_id *cpsw_ale_match_id(const struct cpsw_ale_dev_id *id,
return NULL;
}
+static const struct regmap_config ale_regmap_cfg = {
+ .reg_bits = 32,
+ .val_bits = 32,
+ .reg_stride = 4,
+ .name = "cpsw-ale",
+};
+
+static int cpsw_ale_regfield_init(struct cpsw_ale *ale)
+{
+ const struct reg_field *reg_fields = ale->params.reg_fields;
+ struct device *dev = ale->params.dev;
+ struct regmap *regmap = ale->regmap;
+ int i;
+
+ for (i = 0; i < ALE_FIELDS_MAX; i++) {
+ ale->fields[i] = devm_regmap_field_alloc(dev, regmap,
+ reg_fields[i]);
+ if (IS_ERR(ale->fields[i])) {
+ dev_err(dev, "Unable to allocate regmap field %d\n", i);
+ return PTR_ERR(ale->fields[i]);
+ }
+ }
+
+ return 0;
+}
+
struct cpsw_ale *cpsw_ale_create(struct cpsw_ale_params *params)
{
const struct cpsw_ale_dev_id *ale_dev_id;
+ u32 ale_entries, rev_major, rev_minor;
struct cpsw_ale *ale;
- u32 rev, ale_entries;
+ int ret;
ale_dev_id = cpsw_ale_match_id(cpsw_ale_id_match, params->dev_id);
if (!ale_dev_id)
return ERR_PTR(-EINVAL);
params->ale_entries = ale_dev_id->tbl_entries;
- params->major_ver_mask = ale_dev_id->major_ver_mask;
params->nu_switch_ale = ale_dev_id->nu_switch_ale;
+ params->reg_fields = ale_dev_id->reg_fields;
ale = devm_kzalloc(params->dev, sizeof(*ale), GFP_KERNEL);
if (!ale)
return ERR_PTR(-ENOMEM);
+ ale->regmap = devm_regmap_init_mmio(params->dev, params->ale_regs,
+ &ale_regmap_cfg);
+ if (IS_ERR(ale->regmap)) {
+ dev_err(params->dev, "Couldn't create CPSW ALE regmap\n");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ ale->params = *params;
+ ret = cpsw_ale_regfield_init(ale);
+ if (ret)
+ return ERR_PTR(ret);
ale->p0_untag_vid_mask = devm_bitmap_zalloc(params->dev, VLAN_N_VID,
GFP_KERNEL);
if (!ale->p0_untag_vid_mask)
return ERR_PTR(-ENOMEM);
- ale->params = *params;
ale->ageout = ale->params.ale_ageout * HZ;
ale->features = ale_dev_id->features;
ale->vlan_entry_tbl = ale_dev_id->vlan_entry_tbl;
- rev = readl_relaxed(ale->params.ale_regs + ALE_IDVER);
- ale->version =
- (ALE_VERSION_MAJOR(rev, ale->params.major_ver_mask) << 8) |
- ALE_VERSION_MINOR(rev);
+ regmap_field_read(ale->fields[MINOR_VER], &rev_minor);
+ regmap_field_read(ale->fields[MAJOR_VER], &rev_major);
+ ale->version = rev_major << 8 | rev_minor;
dev_info(ale->params.dev, "initialized cpsw ale version %d.%d\n",
- ALE_VERSION_MAJOR(rev, ale->params.major_ver_mask),
- ALE_VERSION_MINOR(rev));
+ rev_major, rev_minor);
if (ale->features & CPSW_ALE_F_STATUS_REG &&
!ale->params.ale_entries) {
diff --git a/drivers/net/ethernet/ti/cpsw_ale.h b/drivers/net/ethernet/ti/cpsw_ale.h
index 6779ee111d57..58d377dd7496 100644
--- a/drivers/net/ethernet/ti/cpsw_ale.h
+++ b/drivers/net/ethernet/ti/cpsw_ale.h
@@ -8,6 +8,8 @@
#ifndef __TI_CPSW_ALE_H__
#define __TI_CPSW_ALE_H__
+struct reg_fields;
+
struct cpsw_ale_params {
struct device *dev;
void __iomem *ale_regs;
@@ -20,19 +22,26 @@ struct cpsw_ale_params {
* to identify this hardware.
*/
bool nu_switch_ale;
- /* mask bit used in NU Switch ALE is 3 bits instead of 8 bits. So
- * pass it from caller.
- */
- u32 major_ver_mask;
+ const struct reg_field *reg_fields;
const char *dev_id;
unsigned long bus_freq;
};
struct ale_entry_fld;
+struct regmap;
+
+enum ale_fields {
+ MINOR_VER,
+ MAJOR_VER,
+ /* terminator */
+ ALE_FIELDS_MAX,
+};
struct cpsw_ale {
struct cpsw_ale_params params;
struct timer_list timer;
+ struct regmap *regmap;
+ struct regmap_field *fields[ALE_FIELDS_MAX];
unsigned long ageout;
u32 version;
u32 features;
--
2.34.1
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