[dpdk-dev] [PATCH v4 03/22] net/atlantic: hardware register access routines

[Igor Russkikh <Igor.Russkikh@aquantia.com>]

Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: Pavel Belous <Pavel.Belous@aquantia.com>
---
 drivers/net/atlantic/Makefile      |  1 +
 drivers/net/atlantic/atl_hw_regs.c | 52 +++++++++++++++++++++++++++++++++++++
 drivers/net/atlantic/atl_hw_regs.h | 53 ++++++++++++++++++++++++++++++++++++++
 drivers/net/atlantic/atl_types.h   |  4 +++
 drivers/net/atlantic/meson.build   |  1 +
 5 files changed, 111 insertions(+)
 create mode 100644 drivers/net/atlantic/atl_hw_regs.c
 create mode 100644 drivers/net/atlantic/atl_hw_regs.h

diff --git a/drivers/net/atlantic/Makefile b/drivers/net/atlantic/Makefile
index e42ce5b178ab..8613ced71732 100644
--- a/drivers/net/atlantic/Makefile
+++ b/drivers/net/atlantic/Makefile
@@ -23,5 +23,6 @@ LDLIBS += -lrte_bus_pci
 # all source are stored in SRCS-y
 #
 SRCS-$(CONFIG_RTE_LIBRTE_ATLANTIC_PMD) += atl_ethdev.c
+SRCS-$(CONFIG_RTE_LIBRTE_ATLANTIC_PMD) += atl_hw_regs.c
 
 include $(RTE_SDK)/mk/rte.lib.mk
diff --git a/drivers/net/atlantic/atl_hw_regs.c b/drivers/net/atlantic/atl_hw_regs.c
new file mode 100644
index 000000000000..bd42c8341e2b
--- /dev/null
+++ b/drivers/net/atlantic/atl_hw_regs.c
@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0)
+/* Copyright (C) 2014-2017 aQuantia Corporation. */
+
+/* File aq_hw_utils.c: Definitions of helper functions used across
+ * hardware layer.
+ */
+
+#include "atl_hw_regs.h"
+
+#include <rte_io.h>
+#include <rte_byteorder.h>
+
+void aq_hw_write_reg_bit(struct aq_hw_s *aq_hw, u32 addr, u32 msk,
+			 u32 shift, u32 val)
+{
+	if (msk ^ ~0) {
+		u32 reg_old, reg_new;
+
+		reg_old = aq_hw_read_reg(aq_hw, addr);
+		reg_new = (reg_old & (~msk)) | (val << shift);
+
+		if (reg_old != reg_new)
+			aq_hw_write_reg(aq_hw, addr, reg_new);
+	} else {
+		aq_hw_write_reg(aq_hw, addr, val);
+	}
+}
+
+u32 aq_hw_read_reg_bit(struct aq_hw_s *aq_hw, u32 addr, u32 msk, u32 shift)
+{
+	return ((aq_hw_read_reg(aq_hw, addr) & msk) >> shift);
+}
+
+u32 aq_hw_read_reg(struct aq_hw_s *hw, u32 reg)
+{
+	return rte_le_to_cpu_32(rte_read32((u8 *)hw->mmio + reg));
+}
+
+void aq_hw_write_reg(struct aq_hw_s *hw, u32 reg, u32 value)
+{
+	rte_write32((rte_cpu_to_le_32(value)), (u8 *)hw->mmio + reg);
+}
+
+int aq_hw_err_from_flags(struct aq_hw_s *hw)
+{
+	int err = 0;
+
+	if (aq_hw_read_reg(hw, 0x10U) == ~0U)
+		return -ENXIO;
+
+	return err;
+}
diff --git a/drivers/net/atlantic/atl_hw_regs.h b/drivers/net/atlantic/atl_hw_regs.h
new file mode 100644
index 000000000000..a2d6ca804e5e
--- /dev/null
+++ b/drivers/net/atlantic/atl_hw_regs.h
@@ -0,0 +1,53 @@
+/* SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0) */
+/* Copyright (C) 2014-2017 aQuantia Corporation. */
+
+/* File aq_hw_utils.h: Declaration of helper functions used across hardware
+ * layer.
+ */
+
+#ifndef AQ_HW_UTILS_H
+#define AQ_HW_UTILS_H
+
+#include <rte_common.h>
+#include <rte_io.h>
+#include <rte_byteorder.h>
+#include <rte_random.h>
+#include <rte_cycles.h>
+#include "atl_common.h"
+#include "atl_types.h"
+
+
+#ifndef HIDWORD
+#define LODWORD(_qw)    ((u32)(_qw))
+#define HIDWORD(_qw)    ((u32)(((_qw) >> 32) & 0xffffffff))
+#endif
+
+#define AQ_HW_SLEEP(_US_) rte_delay_ms(_US_)
+
+#define mdelay rte_delay_ms
+#define udelay rte_delay_us
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+#define BIT(x)	(1UL << (x))
+
+#define AQ_HW_WAIT_FOR(_B_, _US_, _N_) \
+do { \
+	unsigned int AQ_HW_WAIT_FOR_i; \
+	for (AQ_HW_WAIT_FOR_i = _N_; (!(_B_)) && (AQ_HW_WAIT_FOR_i);\
+	--AQ_HW_WAIT_FOR_i) {\
+		udelay(_US_); \
+	} \
+	if (!AQ_HW_WAIT_FOR_i) {\
+		err = -ETIMEDOUT; \
+	} \
+} while (0)
+
+#define ATL_WRITE_FLUSH(aq_hw) { (void)aq_hw_read_reg(aq_hw, 0x10); }
+
+void aq_hw_write_reg_bit(struct aq_hw_s *aq_hw, u32 addr, u32 msk,
+			 u32 shift, u32 val);
+u32 aq_hw_read_reg_bit(struct aq_hw_s *aq_hw, u32 addr, u32 msk, u32 shift);
+u32 aq_hw_read_reg(struct aq_hw_s *hw, u32 reg);
+void aq_hw_write_reg(struct aq_hw_s *hw, u32 reg, u32 value);
+int aq_hw_err_from_flags(struct aq_hw_s *hw);
+
+#endif /* AQ_HW_UTILS_H */
diff --git a/drivers/net/atlantic/atl_types.h b/drivers/net/atlantic/atl_types.h
index d8c2560807d3..725b0c4dc670 100644
--- a/drivers/net/atlantic/atl_types.h
+++ b/drivers/net/atlantic/atl_types.h
@@ -22,4 +22,8 @@ typedef uint64_t	u64;
 #define min(a, b)	RTE_MIN(a, b)
 #define max(a, b)	RTE_MAX(a, b)
 
+struct aq_hw_s {
+	void *mmio;
+};
+
 #endif
diff --git a/drivers/net/atlantic/meson.build b/drivers/net/atlantic/meson.build
index c5a2546ef657..cd6a0f637a7d 100644
--- a/drivers/net/atlantic/meson.build
+++ b/drivers/net/atlantic/meson.build
@@ -3,4 +3,5 @@
 
 sources = files(
 	'atl_ethdev.c',
+	'atl_hw_regs.c',
 )
-- 
2.7.4