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Commit 9e10fb4c authored by Paolo Abeni's avatar Paolo Abeni
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Merge branch 'remove-legacy-phylink-behaviour' 

Russell King says:

====================
Remove legacy phylink behaviour

This series removes the - as far as I can tell - unreachable code in
mtk_eth_soc that relies upon legacy phylink behaviour, and then removes
the support in phylink for this legacy behaviour.

Patch 1 removes the clocking configuration from mtk_eth_soc for non-
TRGMII, non-serdes based interface modes, and disables those interface
modes prior to phylink configuration.

Patch 2 removes the mac_pcs_get_state() method from mtk_eth_soc which
I believe is also not used - mtk_eth_soc appears not to be used with
SFPs (which would use a kind of in-band mode) nor does any DT appear
to specify in-band mode for any non-serdes based interface mode.

With both of those dealt with, the kernel is now free of any driver
relying on the phylink legacy mode. Therefore, patch 3 removes support
for this.

Finally, with the advent of a new driver being submitted today that
makes use of state->speed in the mac_config() path, patch 4 ensures that
any phylink_link_state member that should not be used in mac_config is
either cleared or set to an invalid value.
====================

Link: https://lore.kernel.org/r/ZLw8DoRskRXLQK37@shell.armlinux.org.ukSigned-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
parents ec87f054 c5714f68
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Showing with 42 additions and 146 deletions
drivers/net/ethernet/mediatek/mtk_eth_soc.c
View file @ 9e10fb4c
......@@ -385,10 +385,8 @@ static int mt7621_gmac0_rgmii_adjust(struct mtk_eth *eth,
}
static void mtk_gmac0_rgmii_adjust(struct mtk_eth *eth,
phy_interface_t interface, int speed)
phy_interface_t interface)
{
unsigned long rate;
u32 tck, rck, intf;
int ret;
if (interface == PHY_INTERFACE_MODE_TRGMII) {
......@@ -399,30 +397,7 @@ static void mtk_gmac0_rgmii_adjust(struct mtk_eth *eth,
return;
}
if (speed == SPEED_1000) {
intf = INTF_MODE_RGMII_1000;
rate = 250000000;
rck = RCK_CTRL_RGMII_1000;
tck = TCK_CTRL_RGMII_1000;
} else {
intf = INTF_MODE_RGMII_10_100;
rate = 500000000;
rck = RCK_CTRL_RGMII_10_100;
tck = TCK_CTRL_RGMII_10_100;
}
mtk_w32(eth, intf, INTF_MODE);
regmap_update_bits(eth->ethsys, ETHSYS_CLKCFG0,
ETHSYS_TRGMII_CLK_SEL362_5,
ETHSYS_TRGMII_CLK_SEL362_5);
ret = clk_set_rate(eth->clks[MTK_CLK_TRGPLL], rate);
if (ret)
dev_err(eth->dev, "Failed to set trgmii pll: %d\n", ret);
mtk_w32(eth, rck, TRGMII_RCK_CTRL);
mtk_w32(eth, tck, TRGMII_TCK_CTRL);
dev_err(eth->dev, "Missing PLL configuration, ethernet may not work\n");
}
static struct phylink_pcs *mtk_mac_select_pcs(struct phylink_config *config,
......@@ -498,17 +473,8 @@ static void mtk_mac_config(struct phylink_config *config, unsigned int mode,
state->interface))
goto err_phy;
} else {
/* FIXME: this is incorrect. Not only does it
* use state->speed (which is not guaranteed
* to be correct) but it also makes use of it
* in a code path that will only be reachable
* when the PHY interface mode changes, not
* when the speed changes. Consequently, RGMII
* is probably broken.
*/
mtk_gmac0_rgmii_adjust(mac->hw,
state->interface,
state->speed);
state->interface);
/* mt7623_pad_clk_setup */
for (i = 0 ; i < NUM_TRGMII_CTRL; i++)
......@@ -602,38 +568,6 @@ static int mtk_mac_finish(struct phylink_config *config, unsigned int mode,
return 0;
}
static void mtk_mac_pcs_get_state(struct phylink_config *config,
struct phylink_link_state *state)
{
struct mtk_mac *mac = container_of(config, struct mtk_mac,
phylink_config);
u32 pmsr = mtk_r32(mac->hw, MTK_MAC_MSR(mac->id));
state->link = (pmsr & MAC_MSR_LINK);
state->duplex = (pmsr & MAC_MSR_DPX) >> 1;
switch (pmsr & (MAC_MSR_SPEED_1000 | MAC_MSR_SPEED_100)) {
case 0:
state->speed = SPEED_10;
break;
case MAC_MSR_SPEED_100:
state->speed = SPEED_100;
break;
case MAC_MSR_SPEED_1000:
state->speed = SPEED_1000;
break;
default:
state->speed = SPEED_UNKNOWN;
break;
}
state->pause &= (MLO_PAUSE_RX | MLO_PAUSE_TX);
if (pmsr & MAC_MSR_RX_FC)
state->pause |= MLO_PAUSE_RX;
if (pmsr & MAC_MSR_TX_FC)
state->pause |= MLO_PAUSE_TX;
}
static void mtk_mac_link_down(struct phylink_config *config, unsigned int mode,
phy_interface_t interface)
{
......@@ -756,7 +690,6 @@ static void mtk_mac_link_up(struct phylink_config *config,
static const struct phylink_mac_ops mtk_phylink_ops = {
.mac_select_pcs = mtk_mac_select_pcs,
.mac_pcs_get_state = mtk_mac_pcs_get_state,
.mac_config = mtk_mac_config,
.mac_finish = mtk_mac_finish,
.mac_link_down = mtk_mac_link_down,
......@@ -4361,11 +4294,14 @@ static int mtk_add_mac(struct mtk_eth *eth, struct device_node *np)
mac->phylink_config.dev = &eth->netdev[id]->dev;
mac->phylink_config.type = PHYLINK_NETDEV;
/* This driver makes use of state->speed in mac_config */
mac->phylink_config.legacy_pre_march2020 = true;
mac->phylink_config.mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
MAC_10 | MAC_100 | MAC_1000 | MAC_2500FD;
/* MT7623 gmac0 is now missing its speed-specific PLL configuration
* in its .mac_config method (since state->speed is not valid there.
* Disable support for MII, GMII and RGMII.
*/
if (!mac->hw->soc->disable_pll_modes || mac->id != 0) {
__set_bit(PHY_INTERFACE_MODE_MII,
mac->phylink_config.supported_interfaces);
__set_bit(PHY_INTERFACE_MODE_GMII,
......@@ -4373,6 +4309,7 @@ static int mtk_add_mac(struct mtk_eth *eth, struct device_node *np)
if (MTK_HAS_CAPS(mac->hw->soc->caps, MTK_RGMII))
phy_interface_set_rgmii(mac->phylink_config.supported_interfaces);
}
if (MTK_HAS_CAPS(mac->hw->soc->caps, MTK_TRGMII) && !mac->id)
__set_bit(PHY_INTERFACE_MODE_TRGMII,
......@@ -4845,6 +4782,7 @@ static const struct mtk_soc_data mt7623_data = {
.offload_version = 1,
.hash_offset = 2,
.foe_entry_size = MTK_FOE_ENTRY_V1_SIZE,
.disable_pll_modes = true,
.txrx = {
.txd_size = sizeof(struct mtk_tx_dma),
.rxd_size = sizeof(struct mtk_rx_dma),
......
drivers/net/ethernet/mediatek/mtk_eth_soc.h
View file @ 9e10fb4c
......@@ -1030,6 +1030,7 @@ struct mtk_soc_data {
u16 foe_entry_size;
netdev_features_t hw_features;
bool has_accounting;
bool disable_pll_modes;
struct {
u32 txd_size;
u32 rxd_size;
......
drivers/net/phy/phylink.c
View file @ 9e10fb4c
......@@ -1066,17 +1066,24 @@ static void phylink_pcs_poll_start(struct phylink *pl)
static void phylink_mac_config(struct phylink *pl,
const struct phylink_link_state *state)
{
struct phylink_link_state st = *state;
/* Stop drivers incorrectly using these */
linkmode_zero(st.lp_advertising);
st.speed = SPEED_UNKNOWN;
st.duplex = DUPLEX_UNKNOWN;
st.an_complete = false;
st.link = false;
phylink_dbg(pl,
"%s: mode=%s/%s/%s/%s/%s adv=%*pb pause=%02x link=%u\n",
"%s: mode=%s/%s/%s adv=%*pb pause=%02x\n",
__func__, phylink_an_mode_str(pl->cur_link_an_mode),
phy_modes(state->interface),
phy_speed_to_str(state->speed),
phy_duplex_to_str(state->duplex),
phy_rate_matching_to_str(state->rate_matching),
__ETHTOOL_LINK_MODE_MASK_NBITS, state->advertising,
state->pause, state->link);
phy_modes(st.interface),
phy_rate_matching_to_str(st.rate_matching),
__ETHTOOL_LINK_MODE_MASK_NBITS, st.advertising,
st.pause);
pl->mac_ops->mac_config(pl->config, pl->cur_link_an_mode, state);
pl->mac_ops->mac_config(pl->config, pl->cur_link_an_mode, &st);
}
static void phylink_pcs_an_restart(struct phylink *pl)
......@@ -1198,13 +1205,6 @@ static int phylink_change_inband_advert(struct phylink *pl)
if (test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state))
return 0;
if (!pl->pcs && pl->config->legacy_pre_march2020) {
/* Legacy method */
phylink_mac_config(pl, &pl->link_config);
phylink_pcs_an_restart(pl);
return 0;
}
phylink_dbg(pl, "%s: mode=%s/%s adv=%*pb pause=%02x\n", __func__,
phylink_an_mode_str(pl->cur_link_an_mode),
phy_modes(pl->link_config.interface),
......@@ -1257,9 +1257,6 @@ static void phylink_mac_pcs_get_state(struct phylink *pl,
if (pl->pcs)
pl->pcs->ops->pcs_get_state(pl->pcs, state);
else if (pl->mac_ops->mac_pcs_get_state &&
pl->config->legacy_pre_march2020)
pl->mac_ops->mac_pcs_get_state(pl->config, state);
else
state->link = 0;
}
......@@ -1492,13 +1489,6 @@ static void phylink_resolve(struct work_struct *w)
}
phylink_major_config(pl, false, &link_state);
pl->link_config.interface = link_state.interface;
} else if (!pl->pcs && pl->config->legacy_pre_march2020) {
/* The interface remains unchanged, only the speed,
* duplex or pause settings have changed. Call the
* old mac_config() method to configure the MAC/PCS
* only if we do not have a legacy MAC driver.
*/
phylink_mac_config(pl, &link_state);
}
}
......@@ -3513,7 +3503,7 @@ static void phylink_decode_usgmii_word(struct phylink_link_state *state,
*
* Parse the Clause 37 or Cisco SGMII link partner negotiation word into
* the phylink @state structure. This is suitable to be used for implementing
* the mac_pcs_get_state() member of the struct phylink_mac_ops structure if
* the pcs_get_state() member of the struct phylink_pcs_ops structure if
* accessing @bmsr and @lpa cannot be done with MDIO directly.
*/
void phylink_mii_c22_pcs_decode_state(struct phylink_link_state *state,
......@@ -3563,7 +3553,7 @@ EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_decode_state);
* Read the MAC PCS state from the MII device configured in @config and
* parse the Clause 37 or Cisco SGMII link partner negotiation word into
* the phylink @state structure. This is suitable to be directly plugged
* into the mac_pcs_get_state() member of the struct phylink_mac_ops
* into the pcs_get_state() member of the struct phylink_pcs_ops
* structure.
*/
void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs,
......@@ -3674,8 +3664,8 @@ EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_config);
* clause 37 negotiation.
*
* Restart the clause 37 negotiation with the link partner. This is
* suitable to be directly plugged into the mac_pcs_get_state() member
* of the struct phylink_mac_ops structure.
* suitable to be directly plugged into the pcs_get_state() member
* of the struct phylink_pcs_ops structure.
*/
void phylink_mii_c22_pcs_an_restart(struct mdio_device *pcs)
{
......
include/linux/phylink.h
View file @ 9e10fb4c
......@@ -201,8 +201,6 @@ enum phylink_op_type {
* struct phylink_config - PHYLINK configuration structure
* @dev: a pointer to a struct device associated with the MAC
* @type: operation type of PHYLINK instance
* @legacy_pre_march2020: driver has not been updated for March 2020 updates
* (See commit 7cceb599d15d ("net: phylink: avoid mac_config calls")
* @poll_fixed_state: if true, starts link_poll,
* if MAC link is at %MLO_AN_FIXED mode.
* @mac_managed_pm: if true, indicate the MAC driver is responsible for PHY PM.
......@@ -216,7 +214,6 @@ enum phylink_op_type {
struct phylink_config {
struct device *dev;
enum phylink_op_type type;
bool legacy_pre_march2020;
bool poll_fixed_state;
bool mac_managed_pm;
bool ovr_an_inband;
......@@ -230,7 +227,6 @@ struct phylink_config {
* struct phylink_mac_ops - MAC operations structure.
* @validate: Validate and update the link configuration.
* @mac_select_pcs: Select a PCS for the interface mode.
* @mac_pcs_get_state: Read the current link state from the hardware.
* @mac_prepare: prepare for a major reconfiguration of the interface.
* @mac_config: configure the MAC for the selected mode and state.
* @mac_finish: finish a major reconfiguration of the interface.
......@@ -245,8 +241,6 @@ struct phylink_mac_ops {
struct phylink_link_state *state);
struct phylink_pcs *(*mac_select_pcs)(struct phylink_config *config,
phy_interface_t interface);
void (*mac_pcs_get_state)(struct phylink_config *config,
struct phylink_link_state *state);
int (*mac_prepare)(struct phylink_config *config, unsigned int mode,
phy_interface_t iface);
void (*mac_config)(struct phylink_config *config, unsigned int mode,
......@@ -312,25 +306,6 @@ void validate(struct phylink_config *config, unsigned long *supported,
struct phylink_pcs *mac_select_pcs(struct phylink_config *config,
phy_interface_t interface);
/**
* mac_pcs_get_state() - Read the current inband link state from the hardware
* @config: a pointer to a &struct phylink_config.
* @state: a pointer to a &struct phylink_link_state.
*
* Read the current inband link state from the MAC PCS, reporting the
* current speed in @state->speed, duplex mode in @state->duplex, pause
* mode in @state->pause using the %MLO_PAUSE_RX and %MLO_PAUSE_TX bits,
* negotiation completion state in @state->an_complete, and link up state
* in @state->link. If possible, @state->lp_advertising should also be
* populated.
*
* Note: This is a legacy method. This function will not be called unless
* legacy_pre_march2020 is set in &struct phylink_config and there is no
* PCS attached.
*/
void mac_pcs_get_state(struct phylink_config *config,
struct phylink_link_state *state);
/**
* mac_prepare() - prepare to change the PHY interface mode
* @config: a pointer to a &struct phylink_config.
......@@ -367,17 +342,9 @@ int mac_prepare(struct phylink_config *config, unsigned int mode,
* guaranteed to be correct, and so any mac_config() implementation must
* never reference these fields.
*
* Note: For legacy March 2020 drivers (drivers with legacy_pre_march2020 set
* in their &phylnk_config and which don't have a PCS), this function will be
* called on each link up event, and to also change the in-band advert. For
* non-legacy drivers, it will only be called to reconfigure the MAC for a
* "major" change in e.g. interface mode. It will not be called for changes
* in speed, duplex or pause modes or to change the in-band advertisement.
* In any case, it is strongly preferred that speed, duplex and pause settings
* are handled in the mac_link_up() method and not in this method.
*
* (this requires a rewrite - please refer to mac_link_up() for situations
* where the PCS and MAC are not tightly integrated.)
* This will only be called to reconfigure the MAC for a "major" change in
* e.g. interface mode. It will not be called for changes in speed, duplex
* or pause modes or to change the in-band advertisement.
*
* In all negotiation modes, as defined by @mode, @state->pause indicates the
* pause settings which should be applied as follows. If %MLO_PAUSE_AN is not
......@@ -409,7 +376,7 @@ int mac_prepare(struct phylink_config *config, unsigned int mode,
* 1000base-X or Cisco SGMII mode depending on the @state->interface
* mode). In both cases, link state management (whether the link
* is up or not) is performed by the MAC, and reported via the
* mac_pcs_get_state() callback. Changes in link state must be made
* pcs_get_state() callback. Changes in link state must be made
* by calling phylink_mac_change().
*
* Interface mode specific details are mentioned below.
......@@ -601,8 +568,8 @@ void pcs_disable(struct phylink_pcs *pcs);
* in @state->link. If possible, @state->lp_advertising should also be
* populated.
*
* When present, this overrides mac_pcs_get_state() in &struct
* phylink_mac_ops.
* When present, this overrides pcs_get_state() in &struct
* phylink_pcs_ops.
*/
void pcs_get_state(struct phylink_pcs *pcs,
struct phylink_link_state *state);
......
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