From: Claudiu Beznea <[email protected]>
Hi,
This series prepares ravb driver for runtime PM support and adjust the
already existing suspend to RAM code to work for RZ/G3S (R9A08G045) SoC.
As there are IP versions that switch to module standby when disabling
the clocks, and because of module standby IP switches to reset and
the register content is lost, to be able to have runtime PM supported
for all IP variants, the configuration operations were moved all to
ravb_open()/ravb_close() letting the ravb_probe() and ravb_remove()
to deal with resource parsing and allocation/free.
The ethtool and IOCTL APIs that could have been run asyncronously
were adapted to return if the interface is down. As explained in
each individual commits description, this should be harmless.
Along with it, the series contains preparatory cleanups.
The series has been tested on the boards with the following device trees:
- r8a7742-iwg21d-q7.dts
- r8a774a1-hihope-rzg2m-ex.dts
- r9a07g043u11-smarc-rzg2ul.dts
- r9a07g054l2-smarc-rzv2l.dts
- r9a07g044l2-smarc-rzg2l.dts
Thank you,
Claudiu Beznea
Changes in v4:
- changed cover letter title and keep on 15 patches in series to cope
with requirement at [1]
- add dependency on RESET_CONTROLLER in patch "net: ravb: Make reset
controller support mandatory"
- use pm_runtime_active() in patch "net: ravb: Move the IRQs get and
request in the probe function"
- set config more before reading the mac address in patch "net: ravb: Set
config mode in ndo_open and reset mode in ndo_close"
- collected tags
[1] https://www.kernel.org/doc/html/v6.6/process/maintainer-netdev.html#tl-dr
Changes in v3:
- collected tags
- addressed review comments
- squashed patch 17/21 ("net: ravb: Keep clock request operations grouped
together") from v2 in patch 07/19 ("net: ravb: Move reference clock
enable/disable on runtime PM APIs") from v3
- check for ndev->flags & IFF_UP in patch 17/19 and 18/19 instead of
checking netif_running()
- dropped patch 19/21 ("net: ravb: Do not set promiscuous mode if the
interface is down") as the changes there are not necessary as
ndev->flags & IFF_UP is already checked at the beginning of
__dev_set_rx_mode()
- remove code from ravb_open() introduced by patch 20/21
("net: ravb: Do not apply RX CSUM settings to hardware if the interface
is down") from v2 as this is not necessary; driver already takes
care of this in ravb_emac_init_rcar()
Changes in v2:
- rework the driver (mainly, ravb_open() contains now only resource
allocation and parsing leaving the settings to ravb_open(); ravb_remove()
has been adapted accordingly) to be able to use runtime PM for all
IP variants; due to this number of patches increased
- adjust previous series to review comments
- collected tags
- populated driver's own runtime PM ops with enable/disable of reference
clock
Claudiu Beznea (15):
net: ravb: Let IP-specific receive function to interrogate descriptors
net: ravb: Rely on PM domain to enable gptp_clk
net: ravb: Make reset controller support mandatory
net: ravb: Switch to SYSTEM_SLEEP_PM_OPS()/RUNTIME_PM_OPS() and
pm_ptr()
net: ravb: Use tabs instead of spaces
net: ravb: Assert/de-assert reset on suspend/resume
net: ravb: Move reference clock enable/disable on runtime PM APIs
net: ravb: Move the IRQs get and request in the probe function
net: ravb: Split GTI computation and set operations
net: ravb: Move delay mode set in the driver's ndo_open API
net: ravb: Move DBAT configuration to the driver's ndo_open API
net: ravb: Move PTP initialization in the driver's ndo_open API for
ccc_gac platorms
net: ravb: Set config mode in ndo_open and reset mode in ndo_close
net: ravb: Simplify ravb_suspend()
net: ravb: Simplify ravb_resume()
drivers/net/ethernet/renesas/Kconfig | 1 +
drivers/net/ethernet/renesas/ravb.h | 6 +-
drivers/net/ethernet/renesas/ravb_main.c | 738 +++++++++++------------
3 files changed, 352 insertions(+), 393 deletions(-)
--
2.39.2
From: Claudiu Beznea <[email protected]>
Reference clock could be or not part of the power domain. If it is part of
the power domain, the power domain takes care of propertly setting it. In
case it is not part of the power domain and full runtime PM support is
available in driver the clock will not be propertly disabled/enabled at
runtime. For this, keep the prepare/unprepare operations in the driver's
probe()/remove() functions and move the enable/disable in runtime PM
functions.
Along with it, the other clock request operations were moved close to
reference clock request and prepare to have all the clock requests
specific code grouped together.
Signed-off-by: Claudiu Beznea <[email protected]>
---
Changes in v4:
- dropped tag
Changes in v3:
- squashed with patch 17/21 ("net: ravb: Keep clock request operations grouped
together") from v2
- collected tags
Changes in v2:
- this patch is new and follows the recommendations proposed in the
discussion of patch 08/13 ("net: ravb: Rely on PM domain to enable refclk")
from v2
drivers/net/ethernet/renesas/ravb_main.c | 110 ++++++++++++-----------
1 file changed, 57 insertions(+), 53 deletions(-)
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 9fc0e39e33c2..4673cc2faec0 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -2664,11 +2664,6 @@ static int ravb_probe(struct platform_device *pdev)
if (error)
goto out_free_netdev;
- pm_runtime_enable(&pdev->dev);
- error = pm_runtime_resume_and_get(&pdev->dev);
- if (error < 0)
- goto out_rpm_disable;
-
if (info->multi_irqs) {
if (info->err_mgmt_irqs)
irq = platform_get_irq_byname(pdev, "dia");
@@ -2679,7 +2674,7 @@ static int ravb_probe(struct platform_device *pdev)
}
if (irq < 0) {
error = irq;
- goto out_release;
+ goto out_reset_assert;
}
ndev->irq = irq;
@@ -2697,10 +2692,37 @@ static int ravb_probe(struct platform_device *pdev)
priv->num_rx_ring[RAVB_NC] = NC_RX_RING_SIZE;
}
+ priv->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(priv->clk)) {
+ error = PTR_ERR(priv->clk);
+ goto out_reset_assert;
+ }
+
+ if (info->gptp_ref_clk) {
+ priv->gptp_clk = devm_clk_get(&pdev->dev, "gptp");
+ if (IS_ERR(priv->gptp_clk)) {
+ error = PTR_ERR(priv->gptp_clk);
+ goto out_reset_assert;
+ }
+ }
+
+ priv->refclk = devm_clk_get_optional(&pdev->dev, "refclk");
+ if (IS_ERR(priv->refclk)) {
+ error = PTR_ERR(priv->refclk);
+ goto out_reset_assert;
+ }
+ clk_prepare(priv->refclk);
+
+ platform_set_drvdata(pdev, ndev);
+ pm_runtime_enable(&pdev->dev);
+ error = pm_runtime_resume_and_get(&pdev->dev);
+ if (error < 0)
+ goto out_rpm_disable;
+
priv->addr = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
if (IS_ERR(priv->addr)) {
error = PTR_ERR(priv->addr);
- goto out_release;
+ goto out_rpm_put;
}
/* The Ether-specific entries in the device structure. */
@@ -2711,7 +2733,7 @@ static int ravb_probe(struct platform_device *pdev)
error = of_get_phy_mode(np, &priv->phy_interface);
if (error && error != -ENODEV)
- goto out_release;
+ goto out_rpm_put;
priv->no_avb_link = of_property_read_bool(np, "renesas,no-ether-link");
priv->avb_link_active_low =
@@ -2724,14 +2746,14 @@ static int ravb_probe(struct platform_device *pdev)
irq = platform_get_irq_byname(pdev, "ch24");
if (irq < 0) {
error = irq;
- goto out_release;
+ goto out_rpm_put;
}
priv->emac_irq = irq;
for (i = 0; i < NUM_RX_QUEUE; i++) {
irq = platform_get_irq_byname(pdev, ravb_rx_irqs[i]);
if (irq < 0) {
error = irq;
- goto out_release;
+ goto out_rpm_put;
}
priv->rx_irqs[i] = irq;
}
@@ -2739,7 +2761,7 @@ static int ravb_probe(struct platform_device *pdev)
irq = platform_get_irq_byname(pdev, ravb_tx_irqs[i]);
if (irq < 0) {
error = irq;
- goto out_release;
+ goto out_rpm_put;
}
priv->tx_irqs[i] = irq;
}
@@ -2748,40 +2770,19 @@ static int ravb_probe(struct platform_device *pdev)
irq = platform_get_irq_byname(pdev, "err_a");
if (irq < 0) {
error = irq;
- goto out_release;
+ goto out_rpm_put;
}
priv->erra_irq = irq;
irq = platform_get_irq_byname(pdev, "mgmt_a");
if (irq < 0) {
error = irq;
- goto out_release;
+ goto out_rpm_put;
}
priv->mgmta_irq = irq;
}
}
- priv->clk = devm_clk_get(&pdev->dev, NULL);
- if (IS_ERR(priv->clk)) {
- error = PTR_ERR(priv->clk);
- goto out_release;
- }
-
- priv->refclk = devm_clk_get_optional(&pdev->dev, "refclk");
- if (IS_ERR(priv->refclk)) {
- error = PTR_ERR(priv->refclk);
- goto out_release;
- }
- clk_prepare_enable(priv->refclk);
-
- if (info->gptp_ref_clk) {
- priv->gptp_clk = devm_clk_get(&pdev->dev, "gptp");
- if (IS_ERR(priv->gptp_clk)) {
- error = PTR_ERR(priv->gptp_clk);
- goto out_disable_refclk;
- }
- }
-
ndev->max_mtu = info->rx_max_buf_size - (ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN);
ndev->min_mtu = ETH_MIN_MTU;
@@ -2799,13 +2800,13 @@ static int ravb_probe(struct platform_device *pdev)
/* Set AVB config mode */
error = ravb_set_config_mode(ndev);
if (error)
- goto out_disable_refclk;
+ goto out_rpm_put;
if (info->gptp || info->ccc_gac) {
/* Set GTI value */
error = ravb_set_gti(ndev);
if (error)
- goto out_disable_refclk;
+ goto out_rpm_put;
/* Request GTI loading */
ravb_modify(ndev, GCCR, GCCR_LTI, GCCR_LTI);
@@ -2825,7 +2826,7 @@ static int ravb_probe(struct platform_device *pdev)
"Cannot allocate desc base address table (size %d bytes)\n",
priv->desc_bat_size);
error = -ENOMEM;
- goto out_disable_refclk;
+ goto out_rpm_put;
}
for (q = RAVB_BE; q < DBAT_ENTRY_NUM; q++)
priv->desc_bat[q].die_dt = DT_EOS;
@@ -2871,8 +2872,6 @@ static int ravb_probe(struct platform_device *pdev)
netdev_info(ndev, "Base address at %#x, %pM, IRQ %d.\n",
(u32)ndev->base_addr, ndev->dev_addr, ndev->irq);
- platform_set_drvdata(pdev, ndev);
-
return 0;
out_napi_del:
@@ -2888,12 +2887,12 @@ static int ravb_probe(struct platform_device *pdev)
/* Stop PTP Clock driver */
if (info->ccc_gac)
ravb_ptp_stop(ndev);
-out_disable_refclk:
- clk_disable_unprepare(priv->refclk);
-out_release:
+out_rpm_put:
pm_runtime_put(&pdev->dev);
out_rpm_disable:
pm_runtime_disable(&pdev->dev);
+ clk_unprepare(priv->refclk);
+out_reset_assert:
reset_control_assert(rstc);
out_free_netdev:
free_netdev(ndev);
@@ -2922,10 +2921,9 @@ static void ravb_remove(struct platform_device *pdev)
ravb_set_opmode(ndev, CCC_OPC_RESET);
- clk_disable_unprepare(priv->refclk);
-
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
+ clk_unprepare(priv->refclk);
reset_control_assert(priv->rstc);
free_netdev(ndev);
platform_set_drvdata(pdev, NULL);
@@ -3060,21 +3058,27 @@ static int ravb_resume(struct device *dev)
return ret;
}
-static int ravb_runtime_nop(struct device *dev)
+static int ravb_runtime_suspend(struct device *dev)
{
- /* Runtime PM callback shared between ->runtime_suspend()
- * and ->runtime_resume(). Simply returns success.
- *
- * This driver re-initializes all registers after
- * pm_runtime_get_sync() anyway so there is no need
- * to save and restore registers here.
- */
+ struct net_device *ndev = dev_get_drvdata(dev);
+ struct ravb_private *priv = netdev_priv(ndev);
+
+ clk_disable(priv->refclk);
+
return 0;
}
+static int ravb_runtime_resume(struct device *dev)
+{
+ struct net_device *ndev = dev_get_drvdata(dev);
+ struct ravb_private *priv = netdev_priv(ndev);
+
+ return clk_enable(priv->refclk);
+}
+
static const struct dev_pm_ops ravb_dev_pm_ops = {
SYSTEM_SLEEP_PM_OPS(ravb_suspend, ravb_resume)
- RUNTIME_PM_OPS(ravb_runtime_nop, ravb_runtime_nop, NULL)
+ RUNTIME_PM_OPS(ravb_runtime_suspend, ravb_runtime_resume, NULL)
};
static struct platform_driver ravb_driver = {
--
2.39.2
From: Claudiu Beznea <[email protected]>
On the RZ/G3S SoC the reset controller is mandatory for the IP to work.
The device tree binding documentation for the ravb driver specifies that
the resets are mandatory. Based on this, make the resets mandatory also in
driver for all ravb devices.
Reviewed-by: Sergey Shtylyov <[email protected]>
Signed-off-by: Claudiu Beznea <[email protected]>
---
Changes in v4:
- select RESET_CONTROLLER
- dropped Geert Rb as I changed the patch again according to his
indication
Changes in v3:
- none
Changes in v2:
- collected tags
drivers/net/ethernet/renesas/Kconfig | 1 +
drivers/net/ethernet/renesas/ravb_main.c | 2 +-
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/renesas/Kconfig b/drivers/net/ethernet/renesas/Kconfig
index d6136fe5c206..b03fae7a0f72 100644
--- a/drivers/net/ethernet/renesas/Kconfig
+++ b/drivers/net/ethernet/renesas/Kconfig
@@ -34,6 +34,7 @@ config RAVB
select MII
select MDIO_BITBANG
select PHYLIB
+ select RESET_CONTROLLER
help
Renesas Ethernet AVB device driver.
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 636da4f558f8..65b084778b93 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -2645,7 +2645,7 @@ static int ravb_probe(struct platform_device *pdev)
return -EINVAL;
}
- rstc = devm_reset_control_get_optional_exclusive(&pdev->dev, NULL);
+ rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
if (IS_ERR(rstc))
return dev_err_probe(&pdev->dev, PTR_ERR(rstc),
"failed to get cpg reset\n");
--
2.39.2
From: Claudiu Beznea <[email protected]>
DBAT setup was done in the driver's probe API. As some IP variants switch
to reset mode (and thus registers content is lost) when setting clocks
(due to module standby functionality) to be able to implement runtime PM
move the DBAT configuration in the driver's ndo_open API.
This commit prepares the code for the addition of runtime PM.
Reviewed-by: Sergey Shtylyov <[email protected]>
Signed-off-by: Claudiu Beznea <[email protected]>
---
Changes in v4:
- none
Changes in v3:
- collected tags
Changes in v2:
- none; this patch is new
drivers/net/ethernet/renesas/ravb_main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 69d4854d6738..3c7748b5e14e 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -1865,6 +1865,7 @@ static int ravb_open(struct net_device *ndev)
napi_enable(&priv->napi[RAVB_NC]);
ravb_set_delay_mode(ndev);
+ ravb_write(ndev, priv->desc_bat_dma, DBAT);
/* Device init */
error = ravb_dmac_init(ndev);
@@ -2808,7 +2809,6 @@ static int ravb_probe(struct platform_device *pdev)
}
for (q = RAVB_BE; q < DBAT_ENTRY_NUM; q++)
priv->desc_bat[q].die_dt = DT_EOS;
- ravb_write(ndev, priv->desc_bat_dma, DBAT);
/* Initialise HW timestamp list */
INIT_LIST_HEAD(&priv->ts_skb_list);
--
2.39.2
From: Claudiu Beznea <[email protected]>
ravb_set_gti() was computing the value of GTI based on the reference clock
rate and then applied it to register. This was done on the driver's probe
function. In order to implement runtime PM for all IP variants (as some IP
variants switches to reset mode (and thus the registers content is lost)
when module standby is configured through clock APIs) the GTI setup was
split in 2 parts: one computing the value of the GTI register (done in the
driver's probe function) and one applying the computed value to register
(done in the driver's ndo_open API).
Reviewed-by: Sergey Shtylyov <[email protected]>
Signed-off-by: Claudiu Beznea <[email protected]>
---
Changes in v4:
- collected tags
Changes in v3:
- fixed typos in patch description
- use u64 instead of uint64_t
- remove ravb_wait() for setting GCCR.LTI
Changes in v2:
- none; this patch is new
drivers/net/ethernet/renesas/ravb.h | 2 +
drivers/net/ethernet/renesas/ravb_main.c | 96 ++++++++++++------------
2 files changed, 52 insertions(+), 46 deletions(-)
diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index e3506888cca6..268ccfafe7aa 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -1102,6 +1102,8 @@ struct ravb_private {
const struct ravb_hw_info *info;
struct reset_control *rstc;
+
+ u32 gti_tiv;
};
static inline u32 ravb_read(struct net_device *ndev, enum ravb_reg reg)
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 724c11c747a6..8956c33c60e2 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -1756,6 +1756,50 @@ static const struct ethtool_ops ravb_ethtool_ops = {
.set_wol = ravb_set_wol,
};
+static void ravb_set_gti(struct net_device *ndev)
+{
+ struct ravb_private *priv = netdev_priv(ndev);
+ const struct ravb_hw_info *info = priv->info;
+
+ if (!(info->gptp || info->ccc_gac))
+ return;
+
+ ravb_write(ndev, priv->gti_tiv, GTI);
+
+ /* Request GTI loading */
+ ravb_modify(ndev, GCCR, GCCR_LTI, GCCR_LTI);
+}
+
+static int ravb_compute_gti(struct net_device *ndev)
+{
+ struct ravb_private *priv = netdev_priv(ndev);
+ const struct ravb_hw_info *info = priv->info;
+ struct device *dev = ndev->dev.parent;
+ unsigned long rate;
+ u64 inc;
+
+ if (!(info->gptp || info->ccc_gac))
+ return 0;
+
+ if (info->gptp_ref_clk)
+ rate = clk_get_rate(priv->gptp_clk);
+ else
+ rate = clk_get_rate(priv->clk);
+ if (!rate)
+ return -EINVAL;
+
+ inc = div64_ul(1000000000ULL << 20, rate);
+
+ if (inc < GTI_TIV_MIN || inc > GTI_TIV_MAX) {
+ dev_err(dev, "gti.tiv increment 0x%llx is outside the range 0x%x - 0x%x\n",
+ inc, GTI_TIV_MIN, GTI_TIV_MAX);
+ return -EINVAL;
+ }
+ priv->gti_tiv = inc;
+
+ return 0;
+}
+
/* Network device open function for Ethernet AVB */
static int ravb_open(struct net_device *ndev)
{
@@ -1773,6 +1817,8 @@ static int ravb_open(struct net_device *ndev)
goto out_napi_off;
ravb_emac_init(ndev);
+ ravb_set_gti(ndev);
+
/* Initialise PTP Clock driver */
if (info->gptp)
ravb_ptp_init(ndev, priv->pdev);
@@ -2464,34 +2510,6 @@ static const struct of_device_id ravb_match_table[] = {
};
MODULE_DEVICE_TABLE(of, ravb_match_table);
-static int ravb_set_gti(struct net_device *ndev)
-{
- struct ravb_private *priv = netdev_priv(ndev);
- const struct ravb_hw_info *info = priv->info;
- struct device *dev = ndev->dev.parent;
- unsigned long rate;
- uint64_t inc;
-
- if (info->gptp_ref_clk)
- rate = clk_get_rate(priv->gptp_clk);
- else
- rate = clk_get_rate(priv->clk);
- if (!rate)
- return -EINVAL;
-
- inc = div64_ul(1000000000ULL << 20, rate);
-
- if (inc < GTI_TIV_MIN || inc > GTI_TIV_MAX) {
- dev_err(dev, "gti.tiv increment 0x%llx is outside the range 0x%x - 0x%x\n",
- inc, GTI_TIV_MIN, GTI_TIV_MAX);
- return -EINVAL;
- }
-
- ravb_write(ndev, inc, GTI);
-
- return 0;
-}
-
static int ravb_set_config_mode(struct net_device *ndev)
{
struct ravb_private *priv = netdev_priv(ndev);
@@ -2763,15 +2781,9 @@ static int ravb_probe(struct platform_device *pdev)
if (error)
goto out_rpm_put;
- if (info->gptp || info->ccc_gac) {
- /* Set GTI value */
- error = ravb_set_gti(ndev);
- if (error)
- goto out_rpm_put;
-
- /* Request GTI loading */
- ravb_modify(ndev, GCCR, GCCR_LTI, GCCR_LTI);
- }
+ error = ravb_compute_gti(ndev);
+ if (error)
+ goto out_rpm_put;
if (info->internal_delay) {
ravb_parse_delay_mode(np, ndev);
@@ -2984,15 +2996,7 @@ static int ravb_resume(struct device *dev)
if (ret)
return ret;
- if (info->gptp || info->ccc_gac) {
- /* Set GTI value */
- ret = ravb_set_gti(ndev);
- if (ret)
- return ret;
-
- /* Request GTI loading */
- ravb_modify(ndev, GCCR, GCCR_LTI, GCCR_LTI);
- }
+ ravb_set_gti(ndev);
if (info->internal_delay)
ravb_set_delay_mode(ndev);
--
2.39.2
From: Claudiu Beznea <[email protected]>
Remove explicit calls to functions that are called by ravb_open(). There is
no need to have them doubled now that the ravb_open() already contains
what is needed for the interface configuration. Along with it,
configurations needed by PTP were moved to ravb_wol_restore(). With this,
code in ravb_resume() becomes simpler.
Reviewed-by: Sergey Shtylyov <[email protected]>
Signed-off-by: Claudiu Beznea <[email protected]>
---
Changes in v4:
- none
Changes in v3:
- fixed typos in patch description
- collected tags
Changes in v2:
- none; this patch is new
drivers/net/ethernet/renesas/ravb_main.c | 58 ++++++++++--------------
1 file changed, 24 insertions(+), 34 deletions(-)
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 74568c836468..ff105e332396 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -2939,6 +2939,20 @@ static int ravb_wol_restore(struct net_device *ndev)
{
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
+ int error;
+
+ /* Set reset mode to rearm the WoL logic. */
+ error = ravb_set_opmode(ndev, CCC_OPC_RESET);
+ if (error)
+ return error;
+
+ /* Set AVB config mode. */
+ error = ravb_set_config_mode(ndev);
+ if (error)
+ return error;
+
+ if (priv->info->ccc_gac)
+ ravb_ptp_init(ndev, priv->pdev);
if (info->nc_queues)
napi_enable(&priv->napi[RAVB_NC]);
@@ -2978,53 +2992,29 @@ static int ravb_resume(struct device *dev)
{
struct net_device *ndev = dev_get_drvdata(dev);
struct ravb_private *priv = netdev_priv(ndev);
- const struct ravb_hw_info *info = priv->info;
int ret;
ret = reset_control_deassert(priv->rstc);
if (ret)
return ret;
- /* If WoL is enabled set reset mode to rearm the WoL logic */
+ if (!netif_running(ndev))
+ return 0;
+
+ /* If WoL is enabled restore the interface. */
if (priv->wol_enabled) {
- ret = ravb_set_opmode(ndev, CCC_OPC_RESET);
+ ret = ravb_wol_restore(ndev);
if (ret)
return ret;
}
- /* All register have been reset to default values.
- * Restore all registers which where setup at probe time and
- * reopen device if it was running before system suspended.
- */
-
- /* Set AVB config mode */
- ret = ravb_set_config_mode(ndev);
- if (ret)
+ /* Reopening the interface will restore the device to the working state. */
+ ret = ravb_open(ndev);
+ if (ret < 0)
return ret;
- ravb_set_gti(ndev);
-
- if (info->internal_delay)
- ravb_set_delay_mode(ndev);
-
- /* Restore descriptor base address table */
- ravb_write(ndev, priv->desc_bat_dma, DBAT);
-
- if (priv->info->ccc_gac)
- ravb_ptp_init(ndev, priv->pdev);
-
- if (netif_running(ndev)) {
- if (priv->wol_enabled) {
- ret = ravb_wol_restore(ndev);
- if (ret)
- return ret;
- }
- ret = ravb_open(ndev);
- if (ret < 0)
- return ret;
- ravb_set_rx_mode(ndev);
- netif_device_attach(ndev);
- }
+ ravb_set_rx_mode(ndev);
+ netif_device_attach(ndev);
return ret;
}
--
2.39.2
From: Claudiu Beznea <[email protected]>
RZ/G3S can go to deep sleep states where power to most of the SoC parts is
off. When resuming from such a state, the Ethernet controller needs to be
reinitialized. De-asserting the reset signal for it should also be done.
Thus, add reset assert/de-assert on suspend/resume functions.
On the resume function, the de-assert was not reverted in case of failures
to give the user a chance to restore the interface (e.g., bringing down/up
the interface) in case suspend/resume failed.
Reviewed-by: Sergey Shtylyov <[email protected]>
Signed-off-by: Claudiu Beznea <[email protected]>
---
Changes in v4:
- none
Changes in v3:
- collected tags
Changes in v2:
- fixed typos in patch description and subject
- on ravb_suspend() assert the reset signal in case interface is down;
due to this the Sergey's Rb tag was left aside in this version
drivers/net/ethernet/renesas/ravb_main.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 0a27d2741e8d..9fc0e39e33c2 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -2978,7 +2978,7 @@ static int ravb_suspend(struct device *dev)
int ret;
if (!netif_running(ndev))
- return 0;
+ goto reset_assert;
netif_device_detach(ndev);
@@ -2990,7 +2990,11 @@ static int ravb_suspend(struct device *dev)
if (priv->info->ccc_gac)
ravb_ptp_stop(ndev);
- return ret;
+ if (priv->wol_enabled)
+ return ret;
+
+reset_assert:
+ return reset_control_assert(priv->rstc);
}
static int ravb_resume(struct device *dev)
@@ -2998,7 +3002,11 @@ static int ravb_resume(struct device *dev)
struct net_device *ndev = dev_get_drvdata(dev);
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
- int ret = 0;
+ int ret;
+
+ ret = reset_control_deassert(priv->rstc);
+ if (ret)
+ return ret;
/* If WoL is enabled set reset mode to rearm the WoL logic */
if (priv->wol_enabled) {
--
2.39.2
From: Claudiu Beznea <[email protected]>
Delay parsing and setting were done in the driver's probe API. As some IP
variants switch to reset mode (and thus registers content is lost) when
setting clocks (due to module standby functionality) to be able to
implement runtime PM keep the delay parsing in the driver's probe function
and move the delay applying function to the driver's ndo_open API.
Along with it, both delay specific functions were kept together.
Reviewed-by: Sergey Shtylyov <[email protected]>
Signed-off-by: Claudiu Beznea <[email protected]>
---
Changes in v4:
- collected tags
Changes in v3:
- fixed typos in patch description
Changes in v2:
- none; this patch is new
drivers/net/ethernet/renesas/ravb_main.c | 107 ++++++++++++-----------
1 file changed, 56 insertions(+), 51 deletions(-)
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 8956c33c60e2..69d4854d6738 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -1800,6 +1800,59 @@ static int ravb_compute_gti(struct net_device *ndev)
return 0;
}
+/* Set tx and rx clock internal delay modes */
+static void ravb_parse_delay_mode(struct device_node *np, struct net_device *ndev)
+{
+ struct ravb_private *priv = netdev_priv(ndev);
+ bool explicit_delay = false;
+ u32 delay;
+
+ if (!priv->info->internal_delay)
+ return;
+
+ if (!of_property_read_u32(np, "rx-internal-delay-ps", &delay)) {
+ /* Valid values are 0 and 1800, according to DT bindings */
+ priv->rxcidm = !!delay;
+ explicit_delay = true;
+ }
+ if (!of_property_read_u32(np, "tx-internal-delay-ps", &delay)) {
+ /* Valid values are 0 and 2000, according to DT bindings */
+ priv->txcidm = !!delay;
+ explicit_delay = true;
+ }
+
+ if (explicit_delay)
+ return;
+
+ /* Fall back to legacy rgmii-*id behavior */
+ if (priv->phy_interface == PHY_INTERFACE_MODE_RGMII_ID ||
+ priv->phy_interface == PHY_INTERFACE_MODE_RGMII_RXID) {
+ priv->rxcidm = 1;
+ priv->rgmii_override = 1;
+ }
+
+ if (priv->phy_interface == PHY_INTERFACE_MODE_RGMII_ID ||
+ priv->phy_interface == PHY_INTERFACE_MODE_RGMII_TXID) {
+ priv->txcidm = 1;
+ priv->rgmii_override = 1;
+ }
+}
+
+static void ravb_set_delay_mode(struct net_device *ndev)
+{
+ struct ravb_private *priv = netdev_priv(ndev);
+ u32 set = 0;
+
+ if (!priv->info->internal_delay)
+ return;
+
+ if (priv->rxcidm)
+ set |= APSR_RDM;
+ if (priv->txcidm)
+ set |= APSR_TDM;
+ ravb_modify(ndev, APSR, APSR_RDM | APSR_TDM, set);
+}
+
/* Network device open function for Ethernet AVB */
static int ravb_open(struct net_device *ndev)
{
@@ -1811,6 +1864,8 @@ static int ravb_open(struct net_device *ndev)
if (info->nc_queues)
napi_enable(&priv->napi[RAVB_NC]);
+ ravb_set_delay_mode(ndev);
+
/* Device init */
error = ravb_dmac_init(ndev);
if (error)
@@ -2531,41 +2586,6 @@ static int ravb_set_config_mode(struct net_device *ndev)
return error;
}
-/* Set tx and rx clock internal delay modes */
-static void ravb_parse_delay_mode(struct device_node *np, struct net_device *ndev)
-{
- struct ravb_private *priv = netdev_priv(ndev);
- bool explicit_delay = false;
- u32 delay;
-
- if (!of_property_read_u32(np, "rx-internal-delay-ps", &delay)) {
- /* Valid values are 0 and 1800, according to DT bindings */
- priv->rxcidm = !!delay;
- explicit_delay = true;
- }
- if (!of_property_read_u32(np, "tx-internal-delay-ps", &delay)) {
- /* Valid values are 0 and 2000, according to DT bindings */
- priv->txcidm = !!delay;
- explicit_delay = true;
- }
-
- if (explicit_delay)
- return;
-
- /* Fall back to legacy rgmii-*id behavior */
- if (priv->phy_interface == PHY_INTERFACE_MODE_RGMII_ID ||
- priv->phy_interface == PHY_INTERFACE_MODE_RGMII_RXID) {
- priv->rxcidm = 1;
- priv->rgmii_override = 1;
- }
-
- if (priv->phy_interface == PHY_INTERFACE_MODE_RGMII_ID ||
- priv->phy_interface == PHY_INTERFACE_MODE_RGMII_TXID) {
- priv->txcidm = 1;
- priv->rgmii_override = 1;
- }
-}
-
static int ravb_setup_irq(struct ravb_private *priv, const char *irq_name,
const char *ch, int *irq, irq_handler_t handler)
{
@@ -2650,18 +2670,6 @@ static int ravb_setup_irqs(struct ravb_private *priv)
return ravb_setup_irq(priv, "ch19", "ch19:tx_nc", &irq, ravb_nc_interrupt);
}
-static void ravb_set_delay_mode(struct net_device *ndev)
-{
- struct ravb_private *priv = netdev_priv(ndev);
- u32 set = 0;
-
- if (priv->rxcidm)
- set |= APSR_RDM;
- if (priv->txcidm)
- set |= APSR_TDM;
- ravb_modify(ndev, APSR, APSR_RDM | APSR_TDM, set);
-}
-
static int ravb_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
@@ -2785,10 +2793,7 @@ static int ravb_probe(struct platform_device *pdev)
if (error)
goto out_rpm_put;
- if (info->internal_delay) {
- ravb_parse_delay_mode(np, ndev);
- ravb_set_delay_mode(ndev);
- }
+ ravb_parse_delay_mode(np, ndev);
/* Allocate descriptor base address table */
priv->desc_bat_size = sizeof(struct ravb_desc) * DBAT_ENTRY_NUM;
--
2.39.2
From: Claudiu Beznea <[email protected]>
Use tabs instead of spaces in the ravb_set_rate_gbeth() function.
This aligns with the coding style requirements.
Reviewed-by: Sergey Shtylyov <[email protected]>
Signed-off-by: Claudiu Beznea <[email protected]>
---
Changes in v4:
- none
Changes in v3:
- none
Changes in v2:
- collected tags
drivers/net/ethernet/renesas/ravb_main.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index d054d1405cec..0a27d2741e8d 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -96,13 +96,13 @@ static void ravb_set_rate_gbeth(struct net_device *ndev)
struct ravb_private *priv = netdev_priv(ndev);
switch (priv->speed) {
- case 10: /* 10BASE */
+ case 10: /* 10BASE */
ravb_write(ndev, GBETH_GECMR_SPEED_10, GECMR);
break;
- case 100: /* 100BASE */
+ case 100: /* 100BASE */
ravb_write(ndev, GBETH_GECMR_SPEED_100, GECMR);
break;
- case 1000: /* 1000BASE */
+ case 1000: /* 1000BASE */
ravb_write(ndev, GBETH_GECMR_SPEED_1000, GECMR);
break;
}
--
2.39.2
From: Claudiu Beznea <[email protected]>
The initialization sequence for PTP is the same for platforms with ccc_gac
and gptp (according to "Figure 50.71 Flow of gPTP Initialization (Normal,
Common to All Modes)" of the R-Car Series, 3rd generation hardware
manual and "Figure 37A.53 Flow of gPTP Initialization (Normal, Common to
All Modes)" of the RZ/G Series hardware manual).
As some IP variants switch to reset mode (and thus the registers content is
lost) when setting clocks (due to module standby functionality) to be able
to implement runtime PM, move the PTP initialization to the driver's
ndo_open API.
This commit prepares the code for the addition of runtime PM.
Reviewed-by: Sergey Shtylyov <[email protected]>
Signed-off-by: Claudiu Beznea <[email protected]>
---
Changes in v4:
- none
Changes in v3:
- fixed typos in patch description
- collected tags
Changes in v2:
- none; this patch is new
drivers/net/ethernet/renesas/ravb_main.c | 18 +++---------------
1 file changed, 3 insertions(+), 15 deletions(-)
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 3c7748b5e14e..91cabe098cc2 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -1876,7 +1876,7 @@ static int ravb_open(struct net_device *ndev)
ravb_set_gti(ndev);
/* Initialise PTP Clock driver */
- if (info->gptp)
+ if (info->gptp || info->ccc_gac)
ravb_ptp_init(ndev, priv->pdev);
/* PHY control start */
@@ -1890,7 +1890,7 @@ static int ravb_open(struct net_device *ndev)
out_ptp_stop:
/* Stop PTP Clock driver */
- if (info->gptp)
+ if (info->gptp || info->ccc_gac)
ravb_ptp_stop(ndev);
ravb_stop_dma(ndev);
out_napi_off:
@@ -2200,7 +2200,7 @@ static int ravb_close(struct net_device *ndev)
ravb_write(ndev, 0, TIC);
/* Stop PTP Clock driver */
- if (info->gptp)
+ if (info->gptp || info->ccc_gac)
ravb_ptp_stop(ndev);
/* Set the config mode to stop the AVB-DMAC's processes */
@@ -2813,10 +2813,6 @@ static int ravb_probe(struct platform_device *pdev)
/* Initialise HW timestamp list */
INIT_LIST_HEAD(&priv->ts_skb_list);
- /* Initialise PTP Clock driver */
- if (info->ccc_gac)
- ravb_ptp_init(ndev, pdev);
-
/* Debug message level */
priv->msg_enable = RAVB_DEF_MSG_ENABLE;
@@ -2861,10 +2857,6 @@ static int ravb_probe(struct platform_device *pdev)
out_dma_free:
dma_free_coherent(ndev->dev.parent, priv->desc_bat_size, priv->desc_bat,
priv->desc_bat_dma);
-
- /* Stop PTP Clock driver */
- if (info->ccc_gac)
- ravb_ptp_stop(ndev);
out_rpm_put:
pm_runtime_put(&pdev->dev);
out_rpm_disable:
@@ -2890,10 +2882,6 @@ static void ravb_remove(struct platform_device *pdev)
ravb_mdio_release(priv);
- /* Stop PTP Clock driver */
- if (info->ccc_gac)
- ravb_ptp_stop(ndev);
-
dma_free_coherent(ndev->dev.parent, priv->desc_bat_size, priv->desc_bat,
priv->desc_bat_dma);
--
2.39.2
On 1/23/24 3:58 PM, Claudiu wrote:
> From: Claudiu Beznea <[email protected]>
>
> Delay parsing and setting were done in the driver's probe API. As some IP
> variants switch to reset mode (and thus registers content is lost) when
s/registers content/the register contents/, perhaps?
> setting clocks (due to module standby functionality) to be able to
> implement runtime PM keep the delay parsing in the driver's probe function
> and move the delay applying function to the driver's ndo_open API.
>
> Along with it, both delay specific functions were kept together.
>
> Reviewed-by: Sergey Shtylyov <[email protected]>
> Signed-off-by: Claudiu Beznea <[email protected]>
[...]
> diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
> index 8956c33c60e2..69d4854d6738 100644
> --- a/drivers/net/ethernet/renesas/ravb_main.c
> +++ b/drivers/net/ethernet/renesas/ravb_main.c
> @@ -1800,6 +1800,59 @@ static int ravb_compute_gti(struct net_device *ndev)
> return 0;
> }
>
> +/* Set tx and rx clock internal delay modes */
> +static void ravb_parse_delay_mode(struct device_node *np, struct net_device *ndev)
Wait, why are you moving this? Its call site didn't move -- it's still
down in the probe() method...
[...]
> @@ -2785,10 +2793,7 @@ static int ravb_probe(struct platform_device *pdev)
> if (error)
> goto out_rpm_put;
>
> - if (info->internal_delay) {
> - ravb_parse_delay_mode(np, ndev);
> - ravb_set_delay_mode(ndev);
> - }
> + ravb_parse_delay_mode(np, ndev);
>
> /* Allocate descriptor base address table */
> priv->desc_bat_size = sizeof(struct ravb_desc) * DBAT_ENTRY_NUM;
>
MBR, Sergey
From: Claudiu Beznea <[email protected]>
As ravb_close() contains now the call to ravb_ptp_stop() for both ccc_gac
and gPTP aware platforms, there is no need to keep the separate call in
ravb_suspend(). Instead, move it to ravb_wol_setup(). In this way the
resulting code is cleaner.
Reviewed-by: Sergey Shtylyov <[email protected]>
Signed-off-by: Claudiu Beznea <[email protected]>
---
Changes in v4:
- none
Changes in v3:
- fixed typos in patch description
- collected tags
Changes in v2:
- none; this patch is new
drivers/net/ethernet/renesas/ravb_main.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index e22760b91a97..74568c836468 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -2929,6 +2929,9 @@ static int ravb_wol_setup(struct net_device *ndev)
/* Enable MagicPacket */
ravb_modify(ndev, ECMR, ECMR_MPDE, ECMR_MPDE);
+ if (priv->info->ccc_gac)
+ ravb_ptp_stop(ndev);
+
return enable_irq_wake(priv->emac_irq);
}
@@ -2961,14 +2964,10 @@ static int ravb_suspend(struct device *dev)
netif_device_detach(ndev);
if (priv->wol_enabled)
- ret = ravb_wol_setup(ndev);
- else
- ret = ravb_close(ndev);
+ return ravb_wol_setup(ndev);
- if (priv->info->ccc_gac)
- ravb_ptp_stop(ndev);
-
- if (priv->wol_enabled)
+ ret = ravb_close(ndev);
+ if (ret)
return ret;
reset_assert:
--
2.39.2
From: Claudiu Beznea <[email protected]>
As some IP variants switch to reset mode (and thus registers content is
lost) when setting clocks (due to module standby functionality) to be able
to implement runtime PM and save more power, set the IP's operating mode to
reset at the end of the probe. Along with it, in the ndo_open API the IP
will be switched to configuration, then operation mode. In the ndo_close
API, the IP will be switched back to reset mode. This allows implementing
runtime PM and, along with it, save more power when the IP is not used.
Signed-off-by: Claudiu Beznea <[email protected]>
---
Changes in v4:
- set config mode before reading mac address
Changes in v3:
- fixed typos in patch description
- in ravb_probe() switch the hardware to reset mode just after phy
initialization
Changes in v2:
- none; this patch is new
drivers/net/ethernet/renesas/ravb_main.c | 78 ++++++++++++++----------
1 file changed, 46 insertions(+), 32 deletions(-)
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 91cabe098cc2..e22760b91a97 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -1756,6 +1756,27 @@ static const struct ethtool_ops ravb_ethtool_ops = {
.set_wol = ravb_set_wol,
};
+static int ravb_set_config_mode(struct net_device *ndev)
+{
+ struct ravb_private *priv = netdev_priv(ndev);
+ const struct ravb_hw_info *info = priv->info;
+ int error;
+
+ if (info->gptp) {
+ error = ravb_set_opmode(ndev, CCC_OPC_CONFIG);
+ if (error)
+ return error;
+ /* Set CSEL value */
+ ravb_modify(ndev, CCC, CCC_CSEL, CCC_CSEL_HPB);
+ } else if (info->ccc_gac) {
+ error = ravb_set_opmode(ndev, CCC_OPC_CONFIG | CCC_GAC | CCC_CSEL_HPB);
+ } else {
+ error = ravb_set_opmode(ndev, CCC_OPC_CONFIG);
+ }
+
+ return error;
+}
+
static void ravb_set_gti(struct net_device *ndev)
{
struct ravb_private *priv = netdev_priv(ndev);
@@ -1864,13 +1885,19 @@ static int ravb_open(struct net_device *ndev)
if (info->nc_queues)
napi_enable(&priv->napi[RAVB_NC]);
+ /* Set AVB config mode */
+ error = ravb_set_config_mode(ndev);
+ if (error)
+ goto out_napi_off;
+
ravb_set_delay_mode(ndev);
ravb_write(ndev, priv->desc_bat_dma, DBAT);
/* Device init */
error = ravb_dmac_init(ndev);
if (error)
- goto out_napi_off;
+ goto out_set_reset;
+
ravb_emac_init(ndev);
ravb_set_gti(ndev);
@@ -1893,6 +1920,8 @@ static int ravb_open(struct net_device *ndev)
if (info->gptp || info->ccc_gac)
ravb_ptp_stop(ndev);
ravb_stop_dma(ndev);
+out_set_reset:
+ ravb_set_opmode(ndev, CCC_OPC_RESET);
out_napi_off:
if (info->nc_queues)
napi_disable(&priv->napi[RAVB_NC]);
@@ -2236,7 +2265,8 @@ static int ravb_close(struct net_device *ndev)
if (info->nc_queues)
ravb_ring_free(ndev, RAVB_NC);
- return 0;
+ /* Set reset mode. */
+ return ravb_set_opmode(ndev, CCC_OPC_RESET);
}
static int ravb_hwtstamp_get(struct net_device *ndev, struct ifreq *req)
@@ -2566,27 +2596,6 @@ static const struct of_device_id ravb_match_table[] = {
};
MODULE_DEVICE_TABLE(of, ravb_match_table);
-static int ravb_set_config_mode(struct net_device *ndev)
-{
- struct ravb_private *priv = netdev_priv(ndev);
- const struct ravb_hw_info *info = priv->info;
- int error;
-
- if (info->gptp) {
- error = ravb_set_opmode(ndev, CCC_OPC_CONFIG);
- if (error)
- return error;
- /* Set CSEL value */
- ravb_modify(ndev, CCC, CCC_CSEL, CCC_CSEL_HPB);
- } else if (info->ccc_gac) {
- error = ravb_set_opmode(ndev, CCC_OPC_CONFIG | CCC_GAC | CCC_CSEL_HPB);
- } else {
- error = ravb_set_opmode(ndev, CCC_OPC_CONFIG);
- }
-
- return error;
-}
-
static int ravb_setup_irq(struct ravb_private *priv, const char *irq_name,
const char *ch, int *irq, irq_handler_t handler)
{
@@ -2785,11 +2794,6 @@ static int ravb_probe(struct platform_device *pdev)
ndev->netdev_ops = &ravb_netdev_ops;
ndev->ethtool_ops = &ravb_ethtool_ops;
- /* Set AVB config mode */
- error = ravb_set_config_mode(ndev);
- if (error)
- goto out_rpm_put;
-
error = ravb_compute_gti(ndev);
if (error)
goto out_rpm_put;
@@ -2816,6 +2820,11 @@ static int ravb_probe(struct platform_device *pdev)
/* Debug message level */
priv->msg_enable = RAVB_DEF_MSG_ENABLE;
+ /* Set config mode as this is needed for PHY initialization. */
+ error = ravb_set_opmode(ndev, CCC_OPC_CONFIG);
+ if (error)
+ goto out_rpm_put;
+
/* Read and set MAC address */
ravb_read_mac_address(np, ndev);
if (!is_valid_ether_addr(ndev->dev_addr)) {
@@ -2828,9 +2837,14 @@ static int ravb_probe(struct platform_device *pdev)
error = ravb_mdio_init(priv);
if (error) {
dev_err(&pdev->dev, "failed to initialize MDIO\n");
- goto out_dma_free;
+ goto out_reset_mode;
}
+ /* Undo previous switch to config opmode. */
+ error = ravb_set_opmode(ndev, CCC_OPC_RESET);
+ if (error)
+ goto out_mdio_release;
+
netif_napi_add(ndev, &priv->napi[RAVB_BE], ravb_poll);
if (info->nc_queues)
netif_napi_add(ndev, &priv->napi[RAVB_NC], ravb_poll);
@@ -2853,8 +2867,10 @@ static int ravb_probe(struct platform_device *pdev)
netif_napi_del(&priv->napi[RAVB_NC]);
netif_napi_del(&priv->napi[RAVB_BE]);
+out_mdio_release:
ravb_mdio_release(priv);
-out_dma_free:
+out_reset_mode:
+ ravb_set_opmode(ndev, CCC_OPC_RESET);
dma_free_coherent(ndev->dev.parent, priv->desc_bat_size, priv->desc_bat,
priv->desc_bat_dma);
out_rpm_put:
@@ -2885,8 +2901,6 @@ static void ravb_remove(struct platform_device *pdev)
dma_free_coherent(ndev->dev.parent, priv->desc_bat_size, priv->desc_bat,
priv->desc_bat_dma);
- ravb_set_opmode(ndev, CCC_OPC_RESET);
-
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
clk_unprepare(priv->refclk);
--
2.39.2
From: Claudiu Beznea <[email protected]>
SET_SYSTEM_SLEEP_PM_OPS() and SET_RUNTIME_PM_OPS() are deprecated now
and require __maybe_unused protection against unused function warnings.
The usage of pm_ptr() and SYSTEM_SLEEP_PM_OPS()/RUNTIME_PM_OPS() allows
the compiler to see the functions, thus suppressing the warning. Thus
drop the __maybe_unused markings.
Reviewed-by: Sergey Shtylyov <[email protected]>
Reviewed-by: Geert Uytterhoeven <[email protected]>
Signed-off-by: Claudiu Beznea <[email protected]>
---
Changes in v4:
- none
Changes in v3:
- none
Changes in v2:
- collected tags
drivers/net/ethernet/renesas/ravb_main.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 65b084778b93..d054d1405cec 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -2971,7 +2971,7 @@ static int ravb_wol_restore(struct net_device *ndev)
return disable_irq_wake(priv->emac_irq);
}
-static int __maybe_unused ravb_suspend(struct device *dev)
+static int ravb_suspend(struct device *dev)
{
struct net_device *ndev = dev_get_drvdata(dev);
struct ravb_private *priv = netdev_priv(ndev);
@@ -2993,7 +2993,7 @@ static int __maybe_unused ravb_suspend(struct device *dev)
return ret;
}
-static int __maybe_unused ravb_resume(struct device *dev)
+static int ravb_resume(struct device *dev)
{
struct net_device *ndev = dev_get_drvdata(dev);
struct ravb_private *priv = netdev_priv(ndev);
@@ -3052,7 +3052,7 @@ static int __maybe_unused ravb_resume(struct device *dev)
return ret;
}
-static int __maybe_unused ravb_runtime_nop(struct device *dev)
+static int ravb_runtime_nop(struct device *dev)
{
/* Runtime PM callback shared between ->runtime_suspend()
* and ->runtime_resume(). Simply returns success.
@@ -3065,8 +3065,8 @@ static int __maybe_unused ravb_runtime_nop(struct device *dev)
}
static const struct dev_pm_ops ravb_dev_pm_ops = {
- SET_SYSTEM_SLEEP_PM_OPS(ravb_suspend, ravb_resume)
- SET_RUNTIME_PM_OPS(ravb_runtime_nop, ravb_runtime_nop, NULL)
+ SYSTEM_SLEEP_PM_OPS(ravb_suspend, ravb_resume)
+ RUNTIME_PM_OPS(ravb_runtime_nop, ravb_runtime_nop, NULL)
};
static struct platform_driver ravb_driver = {
@@ -3074,7 +3074,7 @@ static struct platform_driver ravb_driver = {
.remove_new = ravb_remove,
.driver = {
.name = "ravb",
- .pm = &ravb_dev_pm_ops,
+ .pm = pm_ptr(&ravb_dev_pm_ops),
.of_match_table = ravb_match_table,
},
};
--
2.39.2
From: Claudiu Beznea <[email protected]>
The runtime PM implementation will disable clocks at the end of
ravb_probe(). As some IP variants switch to reset mode as a result of
setting module standby through clock disable APIs, to implement runtime PM
the resource parsing and requesting are moved in the probe function and IP
settings are moved in the open function. This is done because at the end of
the probe some IP variants will switch anyway to reset mode and the
registers content is lost. Also keeping only register specific operations
in the ravb_open()/ravb_close() functions will make them faster.
Commit moves IRQ requests to ravb_probe() to have all the IRQs ready when
the interface is open. As now IRQs gets and requests are in a single place
there is no need to keep intermediary data (like ravb_rx_irqs[] and
ravb_tx_irqs[] arrays or IRQs in struct ravb_private).
In order to avoid accessing the IP registers while the IP is runtime
suspended (e.g. in the timeframe b/w the probe requests shared IRQs and
IP clocks are enabled) in the interrupt handlers were introduced
pm_runtime_active() checks. The device runtime PM usage counter has been
incremented to avoid disabling the device's clocks while the check is in
progress (if any).
This is a preparatory change to add runtime PM support for all IP variants.
Signed-off-by: Claudiu Beznea <[email protected]>
---
Changes in v4:
- use pm_runtime_active() in interrupt handlers
- addressed review comments
Changes in v3:
- fixed typos in patch description
- detailed patch description
- reworked the code to have a single function doing IRQ get and
request
Changes in v2:
- none; this patch is new
drivers/net/ethernet/renesas/ravb.h | 4 -
drivers/net/ethernet/renesas/ravb_main.c | 299 ++++++++++-------------
2 files changed, 130 insertions(+), 173 deletions(-)
diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index e0f8276cffed..e3506888cca6 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -1089,10 +1089,6 @@ struct ravb_private {
int msg_enable;
int speed;
int emac_irq;
- int erra_irq;
- int mgmta_irq;
- int rx_irqs[NUM_RX_QUEUE];
- int tx_irqs[NUM_TX_QUEUE];
unsigned no_avb_link:1;
unsigned avb_link_active_low:1;
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 4673cc2faec0..724c11c747a6 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -38,16 +38,6 @@
NETIF_MSG_RX_ERR | \
NETIF_MSG_TX_ERR)
-static const char *ravb_rx_irqs[NUM_RX_QUEUE] = {
- "ch0", /* RAVB_BE */
- "ch1", /* RAVB_NC */
-};
-
-static const char *ravb_tx_irqs[NUM_TX_QUEUE] = {
- "ch18", /* RAVB_BE */
- "ch19", /* RAVB_NC */
-};
-
void ravb_modify(struct net_device *ndev, enum ravb_reg reg, u32 clear,
u32 set)
{
@@ -1092,11 +1082,23 @@ static irqreturn_t ravb_emac_interrupt(int irq, void *dev_id)
{
struct net_device *ndev = dev_id;
struct ravb_private *priv = netdev_priv(ndev);
+ struct device *dev = &priv->pdev->dev;
+ irqreturn_t result = IRQ_HANDLED;
+
+ pm_runtime_get_noresume(dev);
+
+ if (unlikely(!pm_runtime_active(dev))) {
+ result = IRQ_NONE;
+ goto out_rpm_put;
+ }
spin_lock(&priv->lock);
ravb_emac_interrupt_unlocked(ndev);
spin_unlock(&priv->lock);
- return IRQ_HANDLED;
+
+out_rpm_put:
+ pm_runtime_put_noidle(dev);
+ return result;
}
/* Error interrupt handler */
@@ -1176,9 +1178,15 @@ static irqreturn_t ravb_interrupt(int irq, void *dev_id)
struct net_device *ndev = dev_id;
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
+ struct device *dev = &priv->pdev->dev;
irqreturn_t result = IRQ_NONE;
u32 iss;
+ pm_runtime_get_noresume(dev);
+
+ if (unlikely(!pm_runtime_active(dev)))
+ goto out_rpm_put;
+
spin_lock(&priv->lock);
/* Get interrupt status */
iss = ravb_read(ndev, ISS);
@@ -1222,6 +1230,9 @@ static irqreturn_t ravb_interrupt(int irq, void *dev_id)
}
spin_unlock(&priv->lock);
+
+out_rpm_put:
+ pm_runtime_put_noidle(dev);
return result;
}
@@ -1230,9 +1241,15 @@ static irqreturn_t ravb_multi_interrupt(int irq, void *dev_id)
{
struct net_device *ndev = dev_id;
struct ravb_private *priv = netdev_priv(ndev);
+ struct device *dev = &priv->pdev->dev;
irqreturn_t result = IRQ_NONE;
u32 iss;
+ pm_runtime_get_noresume(dev);
+
+ if (unlikely(!pm_runtime_active(dev)))
+ goto out_rpm_put;
+
spin_lock(&priv->lock);
/* Get interrupt status */
iss = ravb_read(ndev, ISS);
@@ -1254,6 +1271,9 @@ static irqreturn_t ravb_multi_interrupt(int irq, void *dev_id)
}
spin_unlock(&priv->lock);
+
+out_rpm_put:
+ pm_runtime_put_noidle(dev);
return result;
}
@@ -1261,8 +1281,14 @@ static irqreturn_t ravb_dma_interrupt(int irq, void *dev_id, int q)
{
struct net_device *ndev = dev_id;
struct ravb_private *priv = netdev_priv(ndev);
+ struct device *dev = &priv->pdev->dev;
irqreturn_t result = IRQ_NONE;
+ pm_runtime_get_noresume(dev);
+
+ if (unlikely(!pm_runtime_active(dev)))
+ goto out_rpm_put;
+
spin_lock(&priv->lock);
/* Network control/Best effort queue RX/TX */
@@ -1270,6 +1296,9 @@ static irqreturn_t ravb_dma_interrupt(int irq, void *dev_id, int q)
result = IRQ_HANDLED;
spin_unlock(&priv->lock);
+
+out_rpm_put:
+ pm_runtime_put_noidle(dev);
return result;
}
@@ -1727,85 +1756,21 @@ static const struct ethtool_ops ravb_ethtool_ops = {
.set_wol = ravb_set_wol,
};
-static inline int ravb_hook_irq(unsigned int irq, irq_handler_t handler,
- struct net_device *ndev, struct device *dev,
- const char *ch)
-{
- char *name;
- int error;
-
- name = devm_kasprintf(dev, GFP_KERNEL, "%s:%s", ndev->name, ch);
- if (!name)
- return -ENOMEM;
- error = request_irq(irq, handler, 0, name, ndev);
- if (error)
- netdev_err(ndev, "cannot request IRQ %s\n", name);
-
- return error;
-}
-
/* Network device open function for Ethernet AVB */
static int ravb_open(struct net_device *ndev)
{
struct ravb_private *priv = netdev_priv(ndev);
const struct ravb_hw_info *info = priv->info;
- struct platform_device *pdev = priv->pdev;
- struct device *dev = &pdev->dev;
int error;
napi_enable(&priv->napi[RAVB_BE]);
if (info->nc_queues)
napi_enable(&priv->napi[RAVB_NC]);
- if (!info->multi_irqs) {
- error = request_irq(ndev->irq, ravb_interrupt, IRQF_SHARED,
- ndev->name, ndev);
- if (error) {
- netdev_err(ndev, "cannot request IRQ\n");
- goto out_napi_off;
- }
- } else {
- error = ravb_hook_irq(ndev->irq, ravb_multi_interrupt, ndev,
- dev, "ch22:multi");
- if (error)
- goto out_napi_off;
- error = ravb_hook_irq(priv->emac_irq, ravb_emac_interrupt, ndev,
- dev, "ch24:emac");
- if (error)
- goto out_free_irq;
- error = ravb_hook_irq(priv->rx_irqs[RAVB_BE], ravb_be_interrupt,
- ndev, dev, "ch0:rx_be");
- if (error)
- goto out_free_irq_emac;
- error = ravb_hook_irq(priv->tx_irqs[RAVB_BE], ravb_be_interrupt,
- ndev, dev, "ch18:tx_be");
- if (error)
- goto out_free_irq_be_rx;
- error = ravb_hook_irq(priv->rx_irqs[RAVB_NC], ravb_nc_interrupt,
- ndev, dev, "ch1:rx_nc");
- if (error)
- goto out_free_irq_be_tx;
- error = ravb_hook_irq(priv->tx_irqs[RAVB_NC], ravb_nc_interrupt,
- ndev, dev, "ch19:tx_nc");
- if (error)
- goto out_free_irq_nc_rx;
-
- if (info->err_mgmt_irqs) {
- error = ravb_hook_irq(priv->erra_irq, ravb_multi_interrupt,
- ndev, dev, "err_a");
- if (error)
- goto out_free_irq_nc_tx;
- error = ravb_hook_irq(priv->mgmta_irq, ravb_multi_interrupt,
- ndev, dev, "mgmt_a");
- if (error)
- goto out_free_irq_erra;
- }
- }
-
/* Device init */
error = ravb_dmac_init(ndev);
if (error)
- goto out_free_irq_mgmta;
+ goto out_napi_off;
ravb_emac_init(ndev);
/* Initialise PTP Clock driver */
@@ -1826,26 +1791,6 @@ static int ravb_open(struct net_device *ndev)
if (info->gptp)
ravb_ptp_stop(ndev);
ravb_stop_dma(ndev);
-out_free_irq_mgmta:
- if (!info->multi_irqs)
- goto out_free_irq;
- if (info->err_mgmt_irqs)
- free_irq(priv->mgmta_irq, ndev);
-out_free_irq_erra:
- if (info->err_mgmt_irqs)
- free_irq(priv->erra_irq, ndev);
-out_free_irq_nc_tx:
- free_irq(priv->tx_irqs[RAVB_NC], ndev);
-out_free_irq_nc_rx:
- free_irq(priv->rx_irqs[RAVB_NC], ndev);
-out_free_irq_be_tx:
- free_irq(priv->tx_irqs[RAVB_BE], ndev);
-out_free_irq_be_rx:
- free_irq(priv->rx_irqs[RAVB_BE], ndev);
-out_free_irq_emac:
- free_irq(priv->emac_irq, ndev);
-out_free_irq:
- free_irq(ndev->irq, ndev);
out_napi_off:
if (info->nc_queues)
napi_disable(&priv->napi[RAVB_NC]);
@@ -2180,19 +2125,6 @@ static int ravb_close(struct net_device *ndev)
cancel_work_sync(&priv->work);
- if (info->multi_irqs) {
- free_irq(priv->tx_irqs[RAVB_NC], ndev);
- free_irq(priv->rx_irqs[RAVB_NC], ndev);
- free_irq(priv->tx_irqs[RAVB_BE], ndev);
- free_irq(priv->rx_irqs[RAVB_BE], ndev);
- free_irq(priv->emac_irq, ndev);
- if (info->err_mgmt_irqs) {
- free_irq(priv->erra_irq, ndev);
- free_irq(priv->mgmta_irq, ndev);
- }
- }
- free_irq(ndev->irq, ndev);
-
if (info->nc_queues)
napi_disable(&priv->napi[RAVB_NC]);
napi_disable(&priv->napi[RAVB_BE]);
@@ -2616,6 +2548,90 @@ static void ravb_parse_delay_mode(struct device_node *np, struct net_device *nde
}
}
+static int ravb_setup_irq(struct ravb_private *priv, const char *irq_name,
+ const char *ch, int *irq, irq_handler_t handler)
+{
+ struct platform_device *pdev = priv->pdev;
+ struct net_device *ndev = priv->ndev;
+ struct device *dev = &pdev->dev;
+ const char *dev_name;
+ unsigned long flags;
+ int error;
+
+ if (irq_name) {
+ dev_name = devm_kasprintf(dev, GFP_KERNEL, "%s:%s", ndev->name, ch);
+ if (!dev_name)
+ return -ENOMEM;
+
+ *irq = platform_get_irq_byname(pdev, irq_name);
+ flags = 0;
+ } else {
+ dev_name = ndev->name;
+ *irq = platform_get_irq(pdev, 0);
+ flags = IRQF_SHARED;
+ }
+ if (*irq < 0)
+ return *irq;
+
+ error = devm_request_irq(dev, *irq, handler, flags, dev_name, ndev);
+ if (error)
+ netdev_err(ndev, "cannot request IRQ %s\n", dev_name);
+
+ return error;
+}
+
+static int ravb_setup_irqs(struct ravb_private *priv)
+{
+ const struct ravb_hw_info *info = priv->info;
+ struct net_device *ndev = priv->ndev;
+ const char *irq_name, *emac_irq_name;
+ int error, irq;
+
+ if (!info->multi_irqs)
+ return ravb_setup_irq(priv, NULL, NULL, &ndev->irq, ravb_interrupt);
+
+ if (info->err_mgmt_irqs) {
+ irq_name = "dia";
+ emac_irq_name = "line3";
+ } else {
+ irq_name = "ch22";
+ emac_irq_name = "ch24";
+ }
+
+ error = ravb_setup_irq(priv, irq_name, "ch22:multi", &ndev->irq, ravb_multi_interrupt);
+ if (error)
+ return error;
+
+ error = ravb_setup_irq(priv, emac_irq_name, "ch24:emac", &priv->emac_irq,
+ ravb_emac_interrupt);
+ if (error)
+ return error;
+
+ if (info->err_mgmt_irqs) {
+ error = ravb_setup_irq(priv, "err_a", "err_a", &irq, ravb_multi_interrupt);
+ if (error)
+ return error;
+
+ error = ravb_setup_irq(priv, "mgmt_a", "mgmt_a", &irq, ravb_multi_interrupt);
+ if (error)
+ return error;
+ }
+
+ error = ravb_setup_irq(priv, "ch0", "ch0:rx_be", &irq, ravb_be_interrupt);
+ if (error)
+ return error;
+
+ error = ravb_setup_irq(priv, "ch1", "ch1:rx_nc", &irq, ravb_nc_interrupt);
+ if (error)
+ return error;
+
+ error = ravb_setup_irq(priv, "ch18", "ch18:tx_be", &irq, ravb_be_interrupt);
+ if (error)
+ return error;
+
+ return ravb_setup_irq(priv, "ch19", "ch19:tx_nc", &irq, ravb_nc_interrupt);
+}
+
static void ravb_set_delay_mode(struct net_device *ndev)
{
struct ravb_private *priv = netdev_priv(ndev);
@@ -2635,9 +2651,8 @@ static int ravb_probe(struct platform_device *pdev)
struct reset_control *rstc;
struct ravb_private *priv;
struct net_device *ndev;
- int error, irq, q;
struct resource *res;
- int i;
+ int error, q;
if (!np) {
dev_err(&pdev->dev,
@@ -2664,20 +2679,6 @@ static int ravb_probe(struct platform_device *pdev)
if (error)
goto out_free_netdev;
- if (info->multi_irqs) {
- if (info->err_mgmt_irqs)
- irq = platform_get_irq_byname(pdev, "dia");
- else
- irq = platform_get_irq_byname(pdev, "ch22");
- } else {
- irq = platform_get_irq(pdev, 0);
- }
- if (irq < 0) {
- error = irq;
- goto out_reset_assert;
- }
- ndev->irq = irq;
-
SET_NETDEV_DEV(ndev, &pdev->dev);
priv = netdev_priv(ndev);
@@ -2692,6 +2693,10 @@ static int ravb_probe(struct platform_device *pdev)
priv->num_rx_ring[RAVB_NC] = NC_RX_RING_SIZE;
}
+ error = ravb_setup_irqs(priv);
+ if (error)
+ goto out_reset_assert;
+
priv->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(priv->clk)) {
error = PTR_ERR(priv->clk);
@@ -2739,50 +2744,6 @@ static int ravb_probe(struct platform_device *pdev)
priv->avb_link_active_low =
of_property_read_bool(np, "renesas,ether-link-active-low");
- if (info->multi_irqs) {
- if (info->err_mgmt_irqs)
- irq = platform_get_irq_byname(pdev, "line3");
- else
- irq = platform_get_irq_byname(pdev, "ch24");
- if (irq < 0) {
- error = irq;
- goto out_rpm_put;
- }
- priv->emac_irq = irq;
- for (i = 0; i < NUM_RX_QUEUE; i++) {
- irq = platform_get_irq_byname(pdev, ravb_rx_irqs[i]);
- if (irq < 0) {
- error = irq;
- goto out_rpm_put;
- }
- priv->rx_irqs[i] = irq;
- }
- for (i = 0; i < NUM_TX_QUEUE; i++) {
- irq = platform_get_irq_byname(pdev, ravb_tx_irqs[i]);
- if (irq < 0) {
- error = irq;
- goto out_rpm_put;
- }
- priv->tx_irqs[i] = irq;
- }
-
- if (info->err_mgmt_irqs) {
- irq = platform_get_irq_byname(pdev, "err_a");
- if (irq < 0) {
- error = irq;
- goto out_rpm_put;
- }
- priv->erra_irq = irq;
-
- irq = platform_get_irq_byname(pdev, "mgmt_a");
- if (irq < 0) {
- error = irq;
- goto out_rpm_put;
- }
- priv->mgmta_irq = irq;
- }
- }
-
ndev->max_mtu = info->rx_max_buf_size - (ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN);
ndev->min_mtu = ETH_MIN_MTU;
--
2.39.2
Hello!
I suggest the following subject "net: ravb: Move getting/requesting IRQs in
the probe() method".
On 1/23/24 3:58 PM, Claudiu wrote:
> From: Claudiu Beznea <[email protected]>
>
> The runtime PM implementation will disable clocks at the end of
> ravb_probe(). As some IP variants switch to reset mode as a result of
> setting module standby through clock disable APIs, to implement runtime PM
> the resource parsing and requesting are moved in the probe function and IP
> settings are moved in the open function. This is done because at the end of
> the probe some IP variants will switch anyway to reset mode and the
> registers content is lost. Also keeping only register specific operations
Register contents?
> in the ravb_open()/ravb_close() functions will make them faster.
>
> Commit moves IRQ requests to ravb_probe() to have all the IRQs ready when
> the interface is open. As now IRQs gets and requests are in a single place
Again, getting/requesting IRQs.
> there is no need to keep intermediary data (like ravb_rx_irqs[] and
> ravb_tx_irqs[] arrays or IRQs in struct ravb_private).
>
> In order to avoid accessing the IP registers while the IP is runtime
> suspended (e.g. in the timeframe b/w the probe requests shared IRQs and
> IP clocks are enabled) in the interrupt handlers were introduced
> pm_runtime_active() checks. The device runtime PM usage counter has been
> incremented to avoid disabling the device's clocks while the check is in
> progress (if any).
Oh, so this scheme does have some complications...
> This is a preparatory change to add runtime PM support for all IP variants.
>
> Signed-off-by: Claudiu Beznea <[email protected]>
With the above fixed:
Reviewed-by: Sergey Shtylyov <[email protected]>
[...]
MBR, Sergey
On 1/28/24 9:01 PM, Sergey Shtylyov wrote:
[...]
> I suggest the following subject "net: ravb: Move getting/requesting IRQs in
> the probe() method".
Oops, s/in/to/. :-)
[...]
MBR, Sergey
On 1/28/24 9:03 PM, Sergey Shtylyov wrote:
[...]
>> I suggest the following subject "net: ravb: Move getting/requesting IRQs in
>> the probe() method".
Or the probe() API, if you prefer this naming...
> Oops, s/in/to/. :-)
Well, we don't move getting IRQs to the probe() method, but
we move the platfrom_get_irq[_byname]() calls to a sperate function.
So, pperhaps "in" was good... :-)
[...]
MBR, Sergey
On 1/28/24 9:03 PM, Sergey Shtylyov wrote:
[...]
>> I suggest the following subject "net: ravb: Move getting/requesting IRQs in
>> the probe() method".
Or the probe() API, if you prefer this naming...
> Oops, s/in/to/. :-)
Well, we don't move getting IRQs to the probe() method, but
we move the platform_get_irq[_byname]() calls to a sperate function.
So, pperhaps "in" was good... :-)
[...]
MBR, Sergey
On 1/28/24 9:03 PM, Sergey Shtylyov wrote:
[...]
>> I suggest the following subject "net: ravb: Move getting/requesting IRQs in
>> the probe() method".
Or the probe() API, if you prefer this naming...
> Oops, s/in/to/. :-)
Well, we don't move getting IRQs to the probe() method, but
we move the platform_get_irq[_byname]() calls to a separate function.
So, perhaps "in" was good... :-)
[...]
MBR, Sergey
On 1/23/24 3:58 PM, Claudiu wrote:
> From: Claudiu Beznea <[email protected]>
>
> As some IP variants switch to reset mode (and thus registers content is
The register contents?
> lost) when setting clocks (due to module standby functionality) to be able
> to implement runtime PM and save more power, set the IP's operating mode to
> reset at the end of the probe. Along with it, in the ndo_open API the IP
> will be switched to configuration, then operation mode. In the ndo_close
> API, the IP will be switched back to reset mode. This allows implementing
> runtime PM and, along with it, save more power when the IP is not used.
>
> Signed-off-by: Claudiu Beznea <[email protected]>
Reviewed-by: Sergey Shtylyov <[email protected]>
[...]
MBR, Sergey
On 24.01.2024 22:18, Sergey Shtylyov wrote:
> On 1/23/24 3:58 PM, Claudiu wrote:
>
>> From: Claudiu Beznea <[email protected]>
>>
>> Delay parsing and setting were done in the driver's probe API. As some IP
>> variants switch to reset mode (and thus registers content is lost) when
>
> s/registers content/the register contents/, perhaps?
>
>> setting clocks (due to module standby functionality) to be able to
>> implement runtime PM keep the delay parsing in the driver's probe function
>> and move the delay applying function to the driver's ndo_open API.
>>
>> Along with it, both delay specific functions were kept together.
>>
>> Reviewed-by: Sergey Shtylyov <[email protected]>
>> Signed-off-by: Claudiu Beznea <[email protected]>
> [...]
>
>> diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
>> index 8956c33c60e2..69d4854d6738 100644
>> --- a/drivers/net/ethernet/renesas/ravb_main.c
>> +++ b/drivers/net/ethernet/renesas/ravb_main.c
>> @@ -1800,6 +1800,59 @@ static int ravb_compute_gti(struct net_device *ndev)
>> return 0;
>> }
>>
>> +/* Set tx and rx clock internal delay modes */
>> +static void ravb_parse_delay_mode(struct device_node *np, struct net_device *ndev)
>
> Wait, why are you moving this? Its call site didn't move -- it's still
> down in the probe() method...
As explained in the patch description ("Along with it, both delay specific
functions were kept together.") functions were moved closed to each other
to have the code dealing with delay in the same place.
>
> [...]
>> @@ -2785,10 +2793,7 @@ static int ravb_probe(struct platform_device *pdev)
>> if (error)
>> goto out_rpm_put;
>>
>> - if (info->internal_delay) {
>> - ravb_parse_delay_mode(np, ndev);
>> - ravb_set_delay_mode(ndev);
>> - }
>> + ravb_parse_delay_mode(np, ndev);
>>
>> /* Allocate descriptor base address table */
>> priv->desc_bat_size = sizeof(struct ravb_desc) * DBAT_ENTRY_NUM;
>>
>
> MBR, Sergey
On 29.01.2024 15:55, claudiu beznea wrote:
> As explained in the patch description ("Along with it, both delay specific
Or partially explained. I'll try to improve this ^