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e1000e: Add handshake with the CSME to support S0ix

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On the corporate system, the driver will ask from the CSME
(manageability engine) to perform device settings are required
to allow S0ix residency.
This patch provides initial support.

Reviewed-by: Dima Ruinskiy <dima.ruinskiy@intel.com>
Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Dvora Fuxbrumer <dvorax.fuxbrumer@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
This commit is contained in:
Sasha Neftin 2021-06-24 11:18:27 +03:00 • committed by Tony Nguyen
parent 8887ca5474
commit 3e55d23171
2 changed files with 176 additions and 154 deletions
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2
drivers/net/ethernet/intel/e1000e/ich8lan.h
View file

@ -47,6 +47,8 @@
#define E1000_SHRAH_PCH_LPT(_i) (0x0540C + ((_i) * 8)) #define E1000_SHRAH_PCH_LPT(_i) (0x0540C + ((_i) * 8))
#define E1000_H2ME 0x05B50 /* Host to ME */ #define E1000_H2ME 0x05B50 /* Host to ME */
#define E1000_H2ME_START_DPG 0x00000001 /* indicate the ME of DPG */
#define E1000_H2ME_EXIT_DPG 0x00000002 /* indicate the ME exit DPG */
#define E1000_H2ME_ULP 0x00000800 /* ULP Indication Bit */ #define E1000_H2ME_ULP 0x00000800 /* ULP Indication Bit */
#define E1000_H2ME_ENFORCE_SETTINGS 0x00001000 /* Enforce Settings */ #define E1000_H2ME_ENFORCE_SETTINGS 0x00001000 /* Enforce Settings */

132
drivers/net/ethernet/intel/e1000e/netdev.c
View file

@ -6343,6 +6343,14 @@ static void e1000e_s0ix_entry_flow(struct e1000_adapter *adapter)
u32 mac_data; u32 mac_data;
u16 phy_data; u16 phy_data;
if (er32(FWSM) & E1000_ICH_FWSM_FW_VALID) {
/* Request ME configure the device for S0ix */
mac_data = er32(H2ME);
mac_data |= E1000_H2ME_START_DPG;
mac_data &= ~E1000_H2ME_EXIT_DPG;
ew32(H2ME, mac_data);
} else {
/* Request driver configure the device to S0ix */
/* Disable the periodic inband message, /* Disable the periodic inband message,
* don't request PCIe clock in K1 page770_17[10:9] = 10b * don't request PCIe clock in K1 page770_17[10:9] = 10b
*/ */
@ -6380,57 +6388,11 @@ static void e1000e_s0ix_entry_flow(struct e1000_adapter *adapter)
mac_data |= E1000_EXTCNF_CTRL_GATE_PHY_CFG; mac_data |= E1000_EXTCNF_CTRL_GATE_PHY_CFG;
ew32(EXTCNF_CTRL, mac_data); ew32(EXTCNF_CTRL, mac_data);
/* Check MAC Tx/Rx packet buffer pointers.
* Reset MAC Tx/Rx packet buffer pointers to suppress any
* pending traffic indication that would prevent power gating.
*/
mac_data = er32(TDFH);
if (mac_data)
ew32(TDFH, 0);
mac_data = er32(TDFT);
if (mac_data)
ew32(TDFT, 0);
mac_data = er32(TDFHS);
if (mac_data)
ew32(TDFHS, 0);
mac_data = er32(TDFTS);
if (mac_data)
ew32(TDFTS, 0);
mac_data = er32(TDFPC);
if (mac_data)
ew32(TDFPC, 0);
mac_data = er32(RDFH);
if (mac_data)
ew32(RDFH, 0);
mac_data = er32(RDFT);
if (mac_data)
ew32(RDFT, 0);
mac_data = er32(RDFHS);
if (mac_data)
ew32(RDFHS, 0);
mac_data = er32(RDFTS);
if (mac_data)
ew32(RDFTS, 0);
mac_data = er32(RDFPC);
if (mac_data)
ew32(RDFPC, 0);
/* Enable the Dynamic Power Gating in the MAC */ /* Enable the Dynamic Power Gating in the MAC */
mac_data = er32(FEXTNVM7); mac_data = er32(FEXTNVM7);
mac_data |= BIT(22); mac_data |= BIT(22);
ew32(FEXTNVM7, mac_data); ew32(FEXTNVM7, mac_data);
/* Disable the time synchronization clock */
mac_data = er32(FEXTNVM7);
mac_data |= BIT(31);
mac_data &= ~BIT(0);
ew32(FEXTNVM7, mac_data);
/* Dynamic Power Gating Enable */
mac_data = er32(CTRL_EXT);
mac_data |= BIT(3);
ew32(CTRL_EXT, mac_data);
/* Disable disconnected cable conditioning for Power Gating */ /* Disable disconnected cable conditioning for Power Gating */
mac_data = er32(DPGFR); mac_data = er32(DPGFR);
mac_data |= BIT(2); mac_data |= BIT(2);
@ -6467,6 +6429,53 @@ static void e1000e_s0ix_entry_flow(struct e1000_adapter *adapter)
mac_data = er32(FEXTNVM5); mac_data = er32(FEXTNVM5);
mac_data |= BIT(7); mac_data |= BIT(7);
ew32(FEXTNVM5, mac_data); ew32(FEXTNVM5, mac_data);
}
/* Disable the time synchronization clock */
mac_data = er32(FEXTNVM7);
mac_data |= BIT(31);
mac_data &= ~BIT(0);
ew32(FEXTNVM7, mac_data);
/* Dynamic Power Gating Enable */
mac_data = er32(CTRL_EXT);
mac_data |= BIT(3);
ew32(CTRL_EXT, mac_data);
/* Check MAC Tx/Rx packet buffer pointers.
* Reset MAC Tx/Rx packet buffer pointers to suppress any
* pending traffic indication that would prevent power gating.
*/
mac_data = er32(TDFH);
if (mac_data)
ew32(TDFH, 0);
mac_data = er32(TDFT);
if (mac_data)
ew32(TDFT, 0);
mac_data = er32(TDFHS);
if (mac_data)
ew32(TDFHS, 0);
mac_data = er32(TDFTS);
if (mac_data)
ew32(TDFTS, 0);
mac_data = er32(TDFPC);
if (mac_data)
ew32(TDFPC, 0);
mac_data = er32(RDFH);
if (mac_data)
ew32(RDFH, 0);
mac_data = er32(RDFT);
if (mac_data)
ew32(RDFT, 0);
mac_data = er32(RDFHS);
if (mac_data)
ew32(RDFHS, 0);
mac_data = er32(RDFTS);
if (mac_data)
ew32(RDFTS, 0);
mac_data = er32(RDFPC);
if (mac_data)
ew32(RDFPC, 0);
} }
static void e1000e_s0ix_exit_flow(struct e1000_adapter *adapter) static void e1000e_s0ix_exit_flow(struct e1000_adapter *adapter)
@ -6475,16 +6484,20 @@ static void e1000e_s0ix_exit_flow(struct e1000_adapter *adapter)
u32 mac_data; u32 mac_data;
u16 phy_data; u16 phy_data;
if (er32(FWSM) & E1000_ICH_FWSM_FW_VALID) {
/* Request ME unconfigure the device from S0ix */
mac_data = er32(H2ME);
mac_data &= ~E1000_H2ME_START_DPG;
mac_data |= E1000_H2ME_EXIT_DPG;
ew32(H2ME, mac_data);
} else {
/* Request driver unconfigure the device from S0ix */
/* Disable the Dynamic Power Gating in the MAC */ /* Disable the Dynamic Power Gating in the MAC */
mac_data = er32(FEXTNVM7); mac_data = er32(FEXTNVM7);
mac_data &= 0xFFBFFFFF; mac_data &= 0xFFBFFFFF;
ew32(FEXTNVM7, mac_data); ew32(FEXTNVM7, mac_data);
/* Enable the time synchronization clock */
mac_data = er32(FEXTNVM7);
mac_data |= BIT(0);
ew32(FEXTNVM7, mac_data);
/* Disable mPHY power gating for any link and speed */ /* Disable mPHY power gating for any link and speed */
mac_data = er32(FEXTNVM8); mac_data = er32(FEXTNVM8);
mac_data &= ~BIT(9); mac_data &= ~BIT(9);
@ -6514,11 +6527,6 @@ static void e1000e_s0ix_exit_flow(struct e1000_adapter *adapter)
mac_data &= ~BIT(2); mac_data &= ~BIT(2);
ew32(DPGFR, mac_data); ew32(DPGFR, mac_data);
/* Disable Dynamic Power Gating */
mac_data = er32(CTRL_EXT);
mac_data &= 0xFFFFFFF7;
ew32(CTRL_EXT, mac_data);
/* Disable the Dynamic Clock Gating in the DMA and MAC */ /* Disable the Dynamic Clock Gating in the DMA and MAC */
mac_data = er32(CTRL_EXT); mac_data = er32(CTRL_EXT);
mac_data &= 0xFFF7FFFF; mac_data &= 0xFFF7FFFF;
@ -6556,6 +6564,18 @@ static void e1000e_s0ix_exit_flow(struct e1000_adapter *adapter)
mac_data = er32(CTRL_EXT); mac_data = er32(CTRL_EXT);
mac_data &= ~E1000_CTRL_EXT_FORCE_SMBUS; mac_data &= ~E1000_CTRL_EXT_FORCE_SMBUS;
ew32(CTRL_EXT, mac_data); ew32(CTRL_EXT, mac_data);
}
/* Disable Dynamic Power Gating */
mac_data = er32(CTRL_EXT);
mac_data &= 0xFFFFFFF7;
ew32(CTRL_EXT, mac_data);
/* Enable the time synchronization clock */
mac_data = er32(FEXTNVM7);
mac_data &= ~BIT(31);
mac_data |= BIT(0);
ew32(FEXTNVM7, mac_data);
} }
static int e1000e_pm_freeze(struct device *dev) static int e1000e_pm_freeze(struct device *dev)