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-rw-r--r--drivers/net/ethernet/mellanox/mlxsw/item.h553
1 files changed, 553 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/item.h b/drivers/net/ethernet/mellanox/mlxsw/item.h
new file mode 100644
index 000000000..cfafbeb42
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlxsw/item.h
@@ -0,0 +1,553 @@
+/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */
+/* Copyright (c) 2015-2018 Mellanox Technologies. All rights reserved */
+
+#ifndef _MLXSW_ITEM_H
+#define _MLXSW_ITEM_H
+
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/bitops.h>
+
+struct mlxsw_item {
+ unsigned short offset; /* bytes in container */
+ short step; /* step in bytes for indexed items */
+ unsigned short in_step_offset; /* offset within one step */
+ unsigned char shift; /* shift in bits */
+ unsigned char element_size; /* size of element in bit array */
+ bool no_real_shift;
+ union {
+ unsigned char bits;
+ unsigned short bytes;
+ } size;
+ const char *name;
+};
+
+static inline unsigned int
+__mlxsw_item_offset(const struct mlxsw_item *item, unsigned short index,
+ size_t typesize)
+{
+ BUG_ON(index && !item->step);
+ if (item->offset % typesize != 0 ||
+ item->step % typesize != 0 ||
+ item->in_step_offset % typesize != 0) {
+ pr_err("mlxsw: item bug (name=%s,offset=%x,step=%x,in_step_offset=%x,typesize=%zx)\n",
+ item->name, item->offset, item->step,
+ item->in_step_offset, typesize);
+ BUG();
+ }
+
+ return ((item->offset + item->step * index + item->in_step_offset) /
+ typesize);
+}
+
+static inline u8 __mlxsw_item_get8(const char *buf,
+ const struct mlxsw_item *item,
+ unsigned short index)
+{
+ unsigned int offset = __mlxsw_item_offset(item, index, sizeof(u8));
+ u8 *b = (u8 *) buf;
+ u8 tmp;
+
+ tmp = b[offset];
+ tmp >>= item->shift;
+ tmp &= GENMASK(item->size.bits - 1, 0);
+ if (item->no_real_shift)
+ tmp <<= item->shift;
+ return tmp;
+}
+
+static inline void __mlxsw_item_set8(char *buf, const struct mlxsw_item *item,
+ unsigned short index, u8 val)
+{
+ unsigned int offset = __mlxsw_item_offset(item, index,
+ sizeof(u8));
+ u8 *b = (u8 *) buf;
+ u8 mask = GENMASK(item->size.bits - 1, 0) << item->shift;
+ u8 tmp;
+
+ if (!item->no_real_shift)
+ val <<= item->shift;
+ val &= mask;
+ tmp = b[offset];
+ tmp &= ~mask;
+ tmp |= val;
+ b[offset] = tmp;
+}
+
+static inline u16 __mlxsw_item_get16(const char *buf,
+ const struct mlxsw_item *item,
+ unsigned short index)
+{
+ unsigned int offset = __mlxsw_item_offset(item, index, sizeof(u16));
+ __be16 *b = (__be16 *) buf;
+ u16 tmp;
+
+ tmp = be16_to_cpu(b[offset]);
+ tmp >>= item->shift;
+ tmp &= GENMASK(item->size.bits - 1, 0);
+ if (item->no_real_shift)
+ tmp <<= item->shift;
+ return tmp;
+}
+
+static inline void __mlxsw_item_set16(char *buf, const struct mlxsw_item *item,
+ unsigned short index, u16 val)
+{
+ unsigned int offset = __mlxsw_item_offset(item, index,
+ sizeof(u16));
+ __be16 *b = (__be16 *) buf;
+ u16 mask = GENMASK(item->size.bits - 1, 0) << item->shift;
+ u16 tmp;
+
+ if (!item->no_real_shift)
+ val <<= item->shift;
+ val &= mask;
+ tmp = be16_to_cpu(b[offset]);
+ tmp &= ~mask;
+ tmp |= val;
+ b[offset] = cpu_to_be16(tmp);
+}
+
+static inline u32 __mlxsw_item_get32(const char *buf,
+ const struct mlxsw_item *item,
+ unsigned short index)
+{
+ unsigned int offset = __mlxsw_item_offset(item, index, sizeof(u32));
+ __be32 *b = (__be32 *) buf;
+ u32 tmp;
+
+ tmp = be32_to_cpu(b[offset]);
+ tmp >>= item->shift;
+ tmp &= GENMASK(item->size.bits - 1, 0);
+ if (item->no_real_shift)
+ tmp <<= item->shift;
+ return tmp;
+}
+
+static inline void __mlxsw_item_set32(char *buf, const struct mlxsw_item *item,
+ unsigned short index, u32 val)
+{
+ unsigned int offset = __mlxsw_item_offset(item, index,
+ sizeof(u32));
+ __be32 *b = (__be32 *) buf;
+ u32 mask = GENMASK(item->size.bits - 1, 0) << item->shift;
+ u32 tmp;
+
+ if (!item->no_real_shift)
+ val <<= item->shift;
+ val &= mask;
+ tmp = be32_to_cpu(b[offset]);
+ tmp &= ~mask;
+ tmp |= val;
+ b[offset] = cpu_to_be32(tmp);
+}
+
+static inline u64 __mlxsw_item_get64(const char *buf,
+ const struct mlxsw_item *item,
+ unsigned short index)
+{
+ unsigned int offset = __mlxsw_item_offset(item, index, sizeof(u64));
+ __be64 *b = (__be64 *) buf;
+ u64 tmp;
+
+ tmp = be64_to_cpu(b[offset]);
+ tmp >>= item->shift;
+ tmp &= GENMASK_ULL(item->size.bits - 1, 0);
+ if (item->no_real_shift)
+ tmp <<= item->shift;
+ return tmp;
+}
+
+static inline void __mlxsw_item_set64(char *buf, const struct mlxsw_item *item,
+ unsigned short index, u64 val)
+{
+ unsigned int offset = __mlxsw_item_offset(item, index, sizeof(u64));
+ __be64 *b = (__be64 *) buf;
+ u64 mask = GENMASK_ULL(item->size.bits - 1, 0) << item->shift;
+ u64 tmp;
+
+ if (!item->no_real_shift)
+ val <<= item->shift;
+ val &= mask;
+ tmp = be64_to_cpu(b[offset]);
+ tmp &= ~mask;
+ tmp |= val;
+ b[offset] = cpu_to_be64(tmp);
+}
+
+static inline void __mlxsw_item_memcpy_from(const char *buf, char *dst,
+ const struct mlxsw_item *item,
+ unsigned short index)
+{
+ unsigned int offset = __mlxsw_item_offset(item, index, sizeof(char));
+
+ memcpy(dst, &buf[offset], item->size.bytes);
+}
+
+static inline void __mlxsw_item_memcpy_to(char *buf, const char *src,
+ const struct mlxsw_item *item,
+ unsigned short index)
+{
+ unsigned int offset = __mlxsw_item_offset(item, index, sizeof(char));
+
+ memcpy(&buf[offset], src, item->size.bytes);
+}
+
+static inline char *__mlxsw_item_data(char *buf, const struct mlxsw_item *item,
+ unsigned short index)
+{
+ unsigned int offset = __mlxsw_item_offset(item, index, sizeof(char));
+
+ return &buf[offset];
+}
+
+static inline u16
+__mlxsw_item_bit_array_offset(const struct mlxsw_item *item,
+ u16 index, u8 *shift)
+{
+ u16 max_index, be_index;
+ u16 offset; /* byte offset inside the array */
+ u8 in_byte_index;
+
+ BUG_ON(index && !item->element_size);
+ if (item->offset % sizeof(u32) != 0 ||
+ BITS_PER_BYTE % item->element_size != 0) {
+ pr_err("mlxsw: item bug (name=%s,offset=%x,element_size=%x)\n",
+ item->name, item->offset, item->element_size);
+ BUG();
+ }
+
+ max_index = (item->size.bytes << 3) / item->element_size - 1;
+ be_index = max_index - index;
+ offset = be_index * item->element_size >> 3;
+ in_byte_index = index % (BITS_PER_BYTE / item->element_size);
+ *shift = in_byte_index * item->element_size;
+
+ return item->offset + offset;
+}
+
+static inline u8 __mlxsw_item_bit_array_get(const char *buf,
+ const struct mlxsw_item *item,
+ u16 index)
+{
+ u8 shift, tmp;
+ u16 offset = __mlxsw_item_bit_array_offset(item, index, &shift);
+
+ tmp = buf[offset];
+ tmp >>= shift;
+ tmp &= GENMASK(item->element_size - 1, 0);
+ return tmp;
+}
+
+static inline void __mlxsw_item_bit_array_set(char *buf,
+ const struct mlxsw_item *item,
+ u16 index, u8 val)
+{
+ u8 shift, tmp;
+ u16 offset = __mlxsw_item_bit_array_offset(item, index, &shift);
+ u8 mask = GENMASK(item->element_size - 1, 0) << shift;
+
+ val <<= shift;
+ val &= mask;
+ tmp = buf[offset];
+ tmp &= ~mask;
+ tmp |= val;
+ buf[offset] = tmp;
+}
+
+#define __ITEM_NAME(_type, _cname, _iname) \
+ mlxsw_##_type##_##_cname##_##_iname##_item
+
+/* _type: cmd_mbox, reg, etc.
+ * _cname: containter name (e.g. command name, register name)
+ * _iname: item name within the container
+ */
+
+#define MLXSW_ITEM8(_type, _cname, _iname, _offset, _shift, _sizebits) \
+static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
+ .offset = _offset, \
+ .shift = _shift, \
+ .size = {.bits = _sizebits,}, \
+ .name = #_type "_" #_cname "_" #_iname, \
+}; \
+static inline u8 __maybe_unused \
+mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf) \
+{ \
+ return __mlxsw_item_get8(buf, &__ITEM_NAME(_type, _cname, _iname), 0); \
+} \
+static inline void __maybe_unused \
+mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u8 val) \
+{ \
+ __mlxsw_item_set8(buf, &__ITEM_NAME(_type, _cname, _iname), 0, val); \
+}
+
+#define MLXSW_ITEM8_INDEXED(_type, _cname, _iname, _offset, _shift, _sizebits, \
+ _step, _instepoffset, _norealshift) \
+static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
+ .offset = _offset, \
+ .step = _step, \
+ .in_step_offset = _instepoffset, \
+ .shift = _shift, \
+ .no_real_shift = _norealshift, \
+ .size = {.bits = _sizebits,}, \
+ .name = #_type "_" #_cname "_" #_iname, \
+}; \
+static inline u8 __maybe_unused \
+mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf, unsigned short index)\
+{ \
+ return __mlxsw_item_get8(buf, &__ITEM_NAME(_type, _cname, _iname), \
+ index); \
+} \
+static inline void __maybe_unused \
+mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, unsigned short index, \
+ u8 val) \
+{ \
+ __mlxsw_item_set8(buf, &__ITEM_NAME(_type, _cname, _iname), \
+ index, val); \
+}
+
+#define MLXSW_ITEM16(_type, _cname, _iname, _offset, _shift, _sizebits) \
+static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
+ .offset = _offset, \
+ .shift = _shift, \
+ .size = {.bits = _sizebits,}, \
+ .name = #_type "_" #_cname "_" #_iname, \
+}; \
+static inline u16 __maybe_unused \
+mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf) \
+{ \
+ return __mlxsw_item_get16(buf, &__ITEM_NAME(_type, _cname, _iname), 0); \
+} \
+static inline void __maybe_unused \
+mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u16 val) \
+{ \
+ __mlxsw_item_set16(buf, &__ITEM_NAME(_type, _cname, _iname), 0, val); \
+}
+
+#define MLXSW_ITEM16_INDEXED(_type, _cname, _iname, _offset, _shift, _sizebits, \
+ _step, _instepoffset, _norealshift) \
+static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
+ .offset = _offset, \
+ .step = _step, \
+ .in_step_offset = _instepoffset, \
+ .shift = _shift, \
+ .no_real_shift = _norealshift, \
+ .size = {.bits = _sizebits,}, \
+ .name = #_type "_" #_cname "_" #_iname, \
+}; \
+static inline u16 __maybe_unused \
+mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf, unsigned short index)\
+{ \
+ return __mlxsw_item_get16(buf, &__ITEM_NAME(_type, _cname, _iname), \
+ index); \
+} \
+static inline void __maybe_unused \
+mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, unsigned short index, \
+ u16 val) \
+{ \
+ __mlxsw_item_set16(buf, &__ITEM_NAME(_type, _cname, _iname), \
+ index, val); \
+}
+
+#define MLXSW_ITEM32(_type, _cname, _iname, _offset, _shift, _sizebits) \
+static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
+ .offset = _offset, \
+ .shift = _shift, \
+ .size = {.bits = _sizebits,}, \
+ .name = #_type "_" #_cname "_" #_iname, \
+}; \
+static inline u32 __maybe_unused \
+mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf) \
+{ \
+ return __mlxsw_item_get32(buf, &__ITEM_NAME(_type, _cname, _iname), 0); \
+} \
+static inline void __maybe_unused \
+mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u32 val) \
+{ \
+ __mlxsw_item_set32(buf, &__ITEM_NAME(_type, _cname, _iname), 0, val); \
+}
+
+#define LOCAL_PORT_LSB_SIZE 8
+#define LOCAL_PORT_MSB_SIZE 2
+
+#define MLXSW_ITEM32_LP(_type, _cname, _offset1, _shift1, _offset2, _shift2) \
+static struct mlxsw_item __ITEM_NAME(_type, _cname, local_port) = { \
+ .offset = _offset1, \
+ .shift = _shift1, \
+ .size = {.bits = LOCAL_PORT_LSB_SIZE,}, \
+ .name = #_type "_" #_cname "_local_port", \
+}; \
+static struct mlxsw_item __ITEM_NAME(_type, _cname, lp_msb) = { \
+ .offset = _offset2, \
+ .shift = _shift2, \
+ .size = {.bits = LOCAL_PORT_MSB_SIZE,}, \
+ .name = #_type "_" #_cname "_lp_msb", \
+}; \
+static inline u32 __maybe_unused \
+mlxsw_##_type##_##_cname##_local_port_get(const char *buf) \
+{ \
+ u32 local_port, lp_msb; \
+ \
+ local_port = __mlxsw_item_get32(buf, &__ITEM_NAME(_type, _cname, \
+ local_port), 0); \
+ lp_msb = __mlxsw_item_get32(buf, &__ITEM_NAME(_type, _cname, lp_msb), \
+ 0); \
+ return (lp_msb << LOCAL_PORT_LSB_SIZE) + local_port; \
+} \
+static inline void __maybe_unused \
+mlxsw_##_type##_##_cname##_local_port_set(char *buf, u32 val) \
+{ \
+ __mlxsw_item_set32(buf, &__ITEM_NAME(_type, _cname, local_port), 0, \
+ val & ((1 << LOCAL_PORT_LSB_SIZE) - 1)); \
+ __mlxsw_item_set32(buf, &__ITEM_NAME(_type, _cname, lp_msb), 0, \
+ val >> LOCAL_PORT_LSB_SIZE); \
+}
+
+#define MLXSW_ITEM32_INDEXED(_type, _cname, _iname, _offset, _shift, _sizebits, \
+ _step, _instepoffset, _norealshift) \
+static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
+ .offset = _offset, \
+ .step = _step, \
+ .in_step_offset = _instepoffset, \
+ .shift = _shift, \
+ .no_real_shift = _norealshift, \
+ .size = {.bits = _sizebits,}, \
+ .name = #_type "_" #_cname "_" #_iname, \
+}; \
+static inline u32 __maybe_unused \
+mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf, unsigned short index)\
+{ \
+ return __mlxsw_item_get32(buf, &__ITEM_NAME(_type, _cname, _iname), \
+ index); \
+} \
+static inline void __maybe_unused \
+mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, unsigned short index, \
+ u32 val) \
+{ \
+ __mlxsw_item_set32(buf, &__ITEM_NAME(_type, _cname, _iname), \
+ index, val); \
+}
+
+#define MLXSW_ITEM64(_type, _cname, _iname, _offset, _shift, _sizebits) \
+static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
+ .offset = _offset, \
+ .shift = _shift, \
+ .size = {.bits = _sizebits,}, \
+ .name = #_type "_" #_cname "_" #_iname, \
+}; \
+static inline u64 __maybe_unused \
+mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf) \
+{ \
+ return __mlxsw_item_get64(buf, &__ITEM_NAME(_type, _cname, _iname), 0); \
+} \
+static inline void __maybe_unused \
+mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u64 val) \
+{ \
+ __mlxsw_item_set64(buf, &__ITEM_NAME(_type, _cname, _iname), 0, val); \
+}
+
+#define MLXSW_ITEM64_INDEXED(_type, _cname, _iname, _offset, _shift, \
+ _sizebits, _step, _instepoffset, _norealshift) \
+static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
+ .offset = _offset, \
+ .step = _step, \
+ .in_step_offset = _instepoffset, \
+ .shift = _shift, \
+ .no_real_shift = _norealshift, \
+ .size = {.bits = _sizebits,}, \
+ .name = #_type "_" #_cname "_" #_iname, \
+}; \
+static inline u64 __maybe_unused \
+mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf, unsigned short index)\
+{ \
+ return __mlxsw_item_get64(buf, &__ITEM_NAME(_type, _cname, _iname), \
+ index); \
+} \
+static inline void __maybe_unused \
+mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, unsigned short index, \
+ u64 val) \
+{ \
+ __mlxsw_item_set64(buf, &__ITEM_NAME(_type, _cname, _iname), \
+ index, val); \
+}
+
+#define MLXSW_ITEM_BUF(_type, _cname, _iname, _offset, _sizebytes) \
+static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
+ .offset = _offset, \
+ .size = {.bytes = _sizebytes,}, \
+ .name = #_type "_" #_cname "_" #_iname, \
+}; \
+static inline void __maybe_unused \
+mlxsw_##_type##_##_cname##_##_iname##_memcpy_from(const char *buf, char *dst) \
+{ \
+ __mlxsw_item_memcpy_from(buf, dst, \
+ &__ITEM_NAME(_type, _cname, _iname), 0); \
+} \
+static inline void __maybe_unused \
+mlxsw_##_type##_##_cname##_##_iname##_memcpy_to(char *buf, const char *src) \
+{ \
+ __mlxsw_item_memcpy_to(buf, src, \
+ &__ITEM_NAME(_type, _cname, _iname), 0); \
+} \
+static inline char * __maybe_unused \
+mlxsw_##_type##_##_cname##_##_iname##_data(char *buf) \
+{ \
+ return __mlxsw_item_data(buf, &__ITEM_NAME(_type, _cname, _iname), 0); \
+}
+
+#define MLXSW_ITEM_BUF_INDEXED(_type, _cname, _iname, _offset, _sizebytes, \
+ _step, _instepoffset) \
+static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
+ .offset = _offset, \
+ .step = _step, \
+ .in_step_offset = _instepoffset, \
+ .size = {.bytes = _sizebytes,}, \
+ .name = #_type "_" #_cname "_" #_iname, \
+}; \
+static inline void __maybe_unused \
+mlxsw_##_type##_##_cname##_##_iname##_memcpy_from(const char *buf, \
+ unsigned short index, \
+ char *dst) \
+{ \
+ __mlxsw_item_memcpy_from(buf, dst, \
+ &__ITEM_NAME(_type, _cname, _iname), index); \
+} \
+static inline void __maybe_unused \
+mlxsw_##_type##_##_cname##_##_iname##_memcpy_to(char *buf, \
+ unsigned short index, \
+ const char *src) \
+{ \
+ __mlxsw_item_memcpy_to(buf, src, \
+ &__ITEM_NAME(_type, _cname, _iname), index); \
+} \
+static inline char * __maybe_unused \
+mlxsw_##_type##_##_cname##_##_iname##_data(char *buf, unsigned short index) \
+{ \
+ return __mlxsw_item_data(buf, \
+ &__ITEM_NAME(_type, _cname, _iname), index); \
+}
+
+#define MLXSW_ITEM_BIT_ARRAY(_type, _cname, _iname, _offset, _sizebytes, \
+ _element_size) \
+static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
+ .offset = _offset, \
+ .element_size = _element_size, \
+ .size = {.bytes = _sizebytes,}, \
+ .name = #_type "_" #_cname "_" #_iname, \
+}; \
+static inline u8 __maybe_unused \
+mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf, u16 index) \
+{ \
+ return __mlxsw_item_bit_array_get(buf, \
+ &__ITEM_NAME(_type, _cname, _iname), \
+ index); \
+} \
+static inline void __maybe_unused \
+mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u16 index, u8 val) \
+{ \
+ return __mlxsw_item_bit_array_set(buf, \
+ &__ITEM_NAME(_type, _cname, _iname), \
+ index, val); \
+} \
+
+#endif