igb: Refactor of init_nvm_params

This patch refactors the init_nvm_params functions for 82575 and adds a new
function for the i210/i211 devices in order to configure separately the NVM
functionality for the i210/i211 family.
Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/igb/e1000_82575.c

@@ -238,6 +238,7 @@ static s32 igb_init_nvm_params_82575(struct e1000_hw *hw)
 
 	size = (u16)((eecd & E1000_EECD_SIZE_EX_MASK) >>
 		     E1000_EECD_SIZE_EX_SHIFT);
+
 	/* Added to a constant, "size" becomes the left-shift value
 	 * for setting word_size.
 	 */
@@ -250,86 +251,52 @@ static s32 igb_init_nvm_params_82575(struct e1000_hw *hw)
 		size = 15;
 
 	nvm->word_size = 1 << size;
-	if (hw->mac.type < e1000_i210) {
-		nvm->opcode_bits = 8;
-		nvm->delay_usec = 1;
-
-		switch (nvm->override) {
-		case e1000_nvm_override_spi_large:
-			nvm->page_size = 32;
-			nvm->address_bits = 16;
-			break;
-		case e1000_nvm_override_spi_small:
-			nvm->page_size = 8;
-			nvm->address_bits = 8;
-			break;
-		default:
-			nvm->page_size = eecd & E1000_EECD_ADDR_BITS ? 32 : 8;
-			nvm->address_bits = eecd & E1000_EECD_ADDR_BITS ?
-					    16 : 8;
-			break;
-		}
-		if (nvm->word_size == (1 << 15))
-			nvm->page_size = 128;
+	nvm->opcode_bits = 8;
+	nvm->delay_usec = 1;
 
-		nvm->type = e1000_nvm_eeprom_spi;
-	} else {
-		nvm->type = e1000_nvm_flash_hw;
+	switch (nvm->override) {
+	case e1000_nvm_override_spi_large:
+		nvm->page_size = 32;
+		nvm->address_bits = 16;
+		break;
+	case e1000_nvm_override_spi_small:
+		nvm->page_size = 8;
+		nvm->address_bits = 8;
+		break;
+	default:
+		nvm->page_size = eecd & E1000_EECD_ADDR_BITS ? 32 : 8;
+		nvm->address_bits = eecd & E1000_EECD_ADDR_BITS ?
+				    16 : 8;
+		break;
 	}
+	if (nvm->word_size == (1 << 15))
+		nvm->page_size = 128;
+
+	nvm->type = e1000_nvm_eeprom_spi;
 
 	/* NVM Function Pointers */
+	nvm->ops.acquire = igb_acquire_nvm_82575;
+	nvm->ops.release = igb_release_nvm_82575;
+	nvm->ops.write = igb_write_nvm_spi;
+	nvm->ops.validate = igb_validate_nvm_checksum;
+	nvm->ops.update = igb_update_nvm_checksum;
+	if (nvm->word_size < (1 << 15))
+		nvm->ops.read = igb_read_nvm_eerd;
+	else
+		nvm->ops.read = igb_read_nvm_spi;
+
+	/* override generic family function pointers for specific descendants */
 	switch (hw->mac.type) {
 	case e1000_82580:
 		nvm->ops.validate = igb_validate_nvm_checksum_82580;
 		nvm->ops.update = igb_update_nvm_checksum_82580;
-		nvm->ops.acquire = igb_acquire_nvm_82575;
-		nvm->ops.release = igb_release_nvm_82575;
-		if (nvm->word_size < (1 << 15))
-			nvm->ops.read = igb_read_nvm_eerd;
-		else
-			nvm->ops.read = igb_read_nvm_spi;
-		nvm->ops.write = igb_write_nvm_spi;
 		break;
 	case e1000_i354:
 	case e1000_i350:
 		nvm->ops.validate = igb_validate_nvm_checksum_i350;
 		nvm->ops.update = igb_update_nvm_checksum_i350;
-		nvm->ops.acquire = igb_acquire_nvm_82575;
-		nvm->ops.release = igb_release_nvm_82575;
-		if (nvm->word_size < (1 << 15))
-			nvm->ops.read = igb_read_nvm_eerd;
-		else
-			nvm->ops.read = igb_read_nvm_spi;
-		nvm->ops.write = igb_write_nvm_spi;
-		break;
-	case e1000_i210:
-		nvm->ops.validate = igb_validate_nvm_checksum_i210;
-		nvm->ops.update   = igb_update_nvm_checksum_i210;
-		nvm->ops.acquire = igb_acquire_nvm_i210;
-		nvm->ops.release = igb_release_nvm_i210;
-		nvm->ops.read    = igb_read_nvm_srrd_i210;
-		nvm->ops.write   = igb_write_nvm_srwr_i210;
-		nvm->ops.valid_led_default = igb_valid_led_default_i210;
-		break;
-	case e1000_i211:
-		nvm->ops.acquire  = igb_acquire_nvm_i210;
-		nvm->ops.release  = igb_release_nvm_i210;
-		nvm->ops.read     = igb_read_nvm_i211;
-		nvm->ops.valid_led_default = igb_valid_led_default_i210;
-		nvm->ops.validate = NULL;
-		nvm->ops.update   = NULL;
-		nvm->ops.write    = NULL;
 		break;
 	default:
-		nvm->ops.validate = igb_validate_nvm_checksum;
-		nvm->ops.update = igb_update_nvm_checksum;
-		nvm->ops.acquire = igb_acquire_nvm_82575;
-		nvm->ops.release = igb_release_nvm_82575;
-		if (nvm->word_size < (1 << 15))
-			nvm->ops.read = igb_read_nvm_eerd;
-		else
-			nvm->ops.read = igb_read_nvm_spi;
-		nvm->ops.write = igb_write_nvm_spi;
 		break;
 	}
 
@@ -601,6 +568,15 @@ static s32 igb_get_invariants_82575(struct e1000_hw *hw)
 
 	/* NVM initialization */
 	ret_val = igb_init_nvm_params_82575(hw);
+	switch (hw->mac.type) {
+	case e1000_i210:
+	case e1000_i211:
+		ret_val = igb_init_nvm_params_i210(hw);
+		break;
+	default:
+		break;
+	}
+
 	if (ret_val)
 		goto out;
 

drivers/net/ethernet/intel/igb/e1000_defines.h

@@ -620,6 +620,7 @@
 #define E1000_EECD_SIZE_EX_SHIFT     11
 #define E1000_EECD_FLUPD_I210		0x00800000 /* Update FLASH */
 #define E1000_EECD_FLUDONE_I210		0x04000000 /* Update FLASH done*/
+#define E1000_EECD_FLASH_DETECTED_I210	0x00080000 /* FLASH detected */
 #define E1000_FLUDONE_ATTEMPTS		20000
 #define E1000_EERD_EEWR_MAX_COUNT	512 /* buffered EEPROM words rw */
 #define E1000_I210_FIFO_SEL_RX		0x00

drivers/net/ethernet/intel/igb/e1000_hw.h

@@ -110,6 +110,7 @@ enum e1000_nvm_type {
 	e1000_nvm_none,
 	e1000_nvm_eeprom_spi,
 	e1000_nvm_flash_hw,
+	e1000_nvm_invm,
 	e1000_nvm_flash_sw
 };
 

drivers/net/ethernet/intel/igb/e1000_i210.c

@@ -660,6 +660,23 @@ static s32 igb_pool_flash_update_done_i210(struct e1000_hw *hw)
 	return ret_val;
 }
 
+/**
+ *  igb_get_flash_presence_i210 - Check if flash device is detected.
+ *  @hw: pointer to the HW structure
+ *
+ **/
+bool igb_get_flash_presence_i210(struct e1000_hw *hw)
+{
+	u32 eec = 0;
+	bool ret_val = false;
+
+	eec = rd32(E1000_EECD);
+	if (eec & E1000_EECD_FLASH_DETECTED_I210)
+		ret_val = true;
+
+	return ret_val;
+}
+
 /**
  *  igb_update_flash_i210 - Commit EEPROM to the flash
  *  @hw: pointer to the HW structure
@@ -786,3 +803,33 @@ s32 igb_write_xmdio_reg(struct e1000_hw *hw, u16 addr, u8 dev_addr, u16 data)
 {
 	return __igb_access_xmdio_reg(hw, addr, dev_addr, &data, false);
 }
+
+/**
+ *  igb_init_nvm_params_i210 - Init NVM func ptrs.
+ *  @hw: pointer to the HW structure
+ **/
+s32 igb_init_nvm_params_i210(struct e1000_hw *hw)
+{
+	s32 ret_val = 0;
+	struct e1000_nvm_info *nvm = &hw->nvm;
+
+	nvm->ops.acquire = igb_acquire_nvm_i210;
+	nvm->ops.release = igb_release_nvm_i210;
+	nvm->ops.valid_led_default = igb_valid_led_default_i210;
+
+	/* NVM Function Pointers */
+	if (igb_get_flash_presence_i210(hw)) {
+		hw->nvm.type = e1000_nvm_flash_hw;
+		nvm->ops.read    = igb_read_nvm_srrd_i210;
+		nvm->ops.write   = igb_write_nvm_srwr_i210;
+		nvm->ops.validate = igb_validate_nvm_checksum_i210;
+		nvm->ops.update   = igb_update_nvm_checksum_i210;
+	} else {
+		hw->nvm.type = e1000_nvm_invm;
+		nvm->ops.read     = igb_read_nvm_i211;
+		nvm->ops.write    = NULL;
+		nvm->ops.validate = NULL;
+		nvm->ops.update   = NULL;
+	}
+	return ret_val;
+}

drivers/net/ethernet/intel/igb/e1000_i210.h

@@ -49,6 +49,8 @@ extern s32 igb_read_xmdio_reg(struct e1000_hw *hw, u16 addr, u8 dev_addr,
 			      u16 *data);
 extern s32 igb_write_xmdio_reg(struct e1000_hw *hw, u16 addr, u8 dev_addr,
 			       u16 data);
+extern s32 igb_init_nvm_params_i210(struct e1000_hw *hw);
+extern bool igb_get_flash_presence_i210(struct e1000_hw *hw);
 
 #define E1000_STM_OPCODE		0xDB00
 #define E1000_EEPROM_FLASH_SIZE_WORD	0x11