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author | Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2024-06-06 01:51:51 +0200 |
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committer | Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2024-06-17 01:37:03 +0200 |
commit | baf9d20b99ab2f79a501d8d1838cc5cf1ae731c3 (patch) | |
tree | cdcc01205bc62906abe0e11ab36c3c6f0fd348bf /drivers | |
parent | firewire: ohci: use helper functions for self ID sequence (diff) | |
download | linux-baf9d20b99ab2f79a501d8d1838cc5cf1ae731c3.tar.xz linux-baf9d20b99ab2f79a501d8d1838cc5cf1ae731c3.zip |
firewire: core: add common inline functions to serialize/deserialize self ID packet
Within FireWire subsystem, the serializations and deserializations of phy
packet are implemented in several parts. They includes some redundancies.
This commit adds a series of helper functions for the serializations and
deserializations of self ID packet with a Kunit test suite.
Link: https://lore.kernel.org/r/20240605235155.116468-8-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/firewire/packet-serdes-test.c | 255 | ||||
-rw-r--r-- | drivers/firewire/phy-packet-definitions.h | 126 |
2 files changed, 381 insertions, 0 deletions
diff --git a/drivers/firewire/packet-serdes-test.c b/drivers/firewire/packet-serdes-test.c index e83b1fece780..c56199e84f91 100644 --- a/drivers/firewire/packet-serdes-test.c +++ b/drivers/firewire/packet-serdes-test.c @@ -10,6 +10,7 @@ #include <linux/firewire-constants.h> #include "packet-header-definitions.h" +#include "phy-packet-definitions.h" static void serialize_async_header_common(u32 header[ASYNC_HEADER_QUADLET_COUNT], unsigned int dst_id, unsigned int tlabel, @@ -187,6 +188,66 @@ static void deserialize_isoc_header(u32 header, unsigned int *data_length, unsig *sy = isoc_header_get_sy(header); } +static void serialize_phy_packet_self_id_zero(u32 *quadlet, unsigned int packet_identifier, + unsigned int phy_id, bool extended, + bool link_is_active, unsigned int gap_count, + unsigned int scode, bool is_contender, + unsigned int power_class, bool is_initiated_reset, + bool has_more_packets) +{ + phy_packet_set_packet_identifier(quadlet, packet_identifier); + phy_packet_self_id_set_phy_id(quadlet, phy_id); + phy_packet_self_id_set_extended(quadlet, extended); + phy_packet_self_id_zero_set_link_active(quadlet, link_is_active); + phy_packet_self_id_zero_set_gap_count(quadlet, gap_count); + phy_packet_self_id_zero_set_scode(quadlet, scode); + phy_packet_self_id_zero_set_contender(quadlet, is_contender); + phy_packet_self_id_zero_set_power_class(quadlet, power_class); + phy_packet_self_id_zero_set_initiated_reset(quadlet, is_initiated_reset); + phy_packet_self_id_set_more_packets(quadlet, has_more_packets); +} + +static void deserialize_phy_packet_self_id_zero(u32 quadlet, unsigned int *packet_identifier, + unsigned int *phy_id, bool *extended, + bool *link_is_active, unsigned int *gap_count, + unsigned int *scode, bool *is_contender, + unsigned int *power_class, + bool *is_initiated_reset, bool *has_more_packets) +{ + *packet_identifier = phy_packet_get_packet_identifier(quadlet); + *phy_id = phy_packet_self_id_get_phy_id(quadlet); + *extended = phy_packet_self_id_get_extended(quadlet); + *link_is_active = phy_packet_self_id_zero_get_link_active(quadlet); + *gap_count = phy_packet_self_id_zero_get_gap_count(quadlet); + *scode = phy_packet_self_id_zero_get_scode(quadlet); + *is_contender = phy_packet_self_id_zero_get_contender(quadlet); + *power_class = phy_packet_self_id_zero_get_power_class(quadlet); + *is_initiated_reset = phy_packet_self_id_zero_get_initiated_reset(quadlet); + *has_more_packets = phy_packet_self_id_get_more_packets(quadlet); +} + +static void serialize_phy_packet_self_id_extended(u32 *quadlet, unsigned int packet_identifier, + unsigned int phy_id, bool extended, + unsigned int sequence, bool has_more_packets) +{ + phy_packet_set_packet_identifier(quadlet, packet_identifier); + phy_packet_self_id_set_phy_id(quadlet, phy_id); + phy_packet_self_id_set_extended(quadlet, extended); + phy_packet_self_id_extended_set_sequence(quadlet, sequence); + phy_packet_self_id_set_more_packets(quadlet, has_more_packets); +} + +static void deserialize_phy_packet_self_id_extended(u32 quadlet, unsigned int *packet_identifier, + unsigned int *phy_id, bool *extended, + unsigned int *sequence, bool *has_more_packets) +{ + *packet_identifier = phy_packet_get_packet_identifier(quadlet); + *phy_id = phy_packet_self_id_get_phy_id(quadlet); + *extended = phy_packet_self_id_get_extended(quadlet); + *sequence = phy_packet_self_id_extended_get_sequence(quadlet); + *has_more_packets = phy_packet_self_id_get_more_packets(quadlet); +} + static void test_async_header_write_quadlet_request(struct kunit *test) { static const u32 expected[ASYNC_HEADER_QUADLET_COUNT] = { @@ -559,6 +620,197 @@ static void test_isoc_header(struct kunit *test) KUNIT_EXPECT_EQ(test, header, expected); } +static void test_phy_packet_self_id_zero_case0(struct kunit *test) +{ + // TSB41AB1/2 with 1 port. + const u32 expected[] = {0x80458c80}; + u32 quadlets[] = {0}; + + unsigned int packet_identifier; + unsigned int phy_id; + bool extended; + bool link_is_active; + unsigned int gap_count; + unsigned int scode; + bool is_contender; + unsigned int power_class; + enum phy_packet_self_id_port_status port_status[3]; + bool is_initiated_reset; + bool has_more_packets; + unsigned int port_index; + + deserialize_phy_packet_self_id_zero(expected[0], &packet_identifier, &phy_id, &extended, + &link_is_active, &gap_count, &scode, &is_contender, + &power_class, &is_initiated_reset, &has_more_packets); + + KUNIT_EXPECT_EQ(test, PHY_PACKET_PACKET_IDENTIFIER_SELF_ID, packet_identifier); + KUNIT_EXPECT_EQ(test, 0, phy_id); + KUNIT_EXPECT_FALSE(test, extended); + KUNIT_EXPECT_TRUE(test, link_is_active); + KUNIT_EXPECT_EQ(test, 0x05, gap_count); + KUNIT_EXPECT_EQ(test, SCODE_400, scode); + KUNIT_EXPECT_TRUE(test, is_contender); + KUNIT_EXPECT_EQ(test, 0x4, power_class); + KUNIT_EXPECT_FALSE(test, is_initiated_reset); + KUNIT_EXPECT_FALSE(test, has_more_packets); + + serialize_phy_packet_self_id_zero(quadlets, packet_identifier, phy_id, extended, + link_is_active, gap_count, scode, is_contender, + power_class, is_initiated_reset, has_more_packets); + + for (port_index = 0; port_index < ARRAY_SIZE(port_status); ++port_index) { + port_status[port_index] = + self_id_sequence_get_port_status(expected, ARRAY_SIZE(expected), port_index); + } + + KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_PARENT, port_status[0]); + KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_NONE, port_status[1]); + KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_NONE, port_status[2]); + + for (port_index = 0; port_index < ARRAY_SIZE(port_status); ++port_index) { + self_id_sequence_set_port_status(quadlets, ARRAY_SIZE(quadlets), port_index, + port_status[port_index]); + } + + KUNIT_EXPECT_MEMEQ(test, quadlets, expected, sizeof(expected)); +} + +static void test_phy_packet_self_id_zero_case1(struct kunit *test) +{ + // XIO2213 and TSB81BA3E with 3 ports. + const u32 expected[] = {0x817fcc5e}; + u32 quadlets[] = {0}; + + unsigned int packet_identifier; + unsigned int phy_id; + bool extended; + bool link_is_active; + unsigned int gap_count; + unsigned int scode; + bool is_contender; + unsigned int power_class; + enum phy_packet_self_id_port_status port_status[3]; + bool is_initiated_reset; + bool has_more_packets; + unsigned int port_index; + + deserialize_phy_packet_self_id_zero(expected[0], &packet_identifier, &phy_id, &extended, + &link_is_active, &gap_count, &scode, &is_contender, + &power_class, &is_initiated_reset, &has_more_packets); + + KUNIT_EXPECT_EQ(test, PHY_PACKET_PACKET_IDENTIFIER_SELF_ID, packet_identifier); + KUNIT_EXPECT_EQ(test, 1, phy_id); + KUNIT_EXPECT_FALSE(test, extended); + KUNIT_EXPECT_TRUE(test, link_is_active); + KUNIT_EXPECT_EQ(test, 0x3f, gap_count); + KUNIT_EXPECT_EQ(test, SCODE_800, scode); + KUNIT_EXPECT_TRUE(test, is_contender); + KUNIT_EXPECT_EQ(test, 0x4, power_class); + KUNIT_EXPECT_TRUE(test, is_initiated_reset); + KUNIT_EXPECT_FALSE(test, has_more_packets); + + serialize_phy_packet_self_id_zero(quadlets, packet_identifier, phy_id, extended, + link_is_active, gap_count, scode, is_contender, + power_class, is_initiated_reset, has_more_packets); + + for (port_index = 0; port_index < ARRAY_SIZE(port_status); ++port_index) { + port_status[port_index] = + self_id_sequence_get_port_status(expected, ARRAY_SIZE(expected), port_index); + } + + KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_NCONN, port_status[0]); + KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_NCONN, port_status[1]); + KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_CHILD, port_status[2]); + + for (port_index = 0; port_index < ARRAY_SIZE(port_status); ++port_index) { + self_id_sequence_set_port_status(quadlets, ARRAY_SIZE(quadlets), port_index, + port_status[port_index]); + } + + KUNIT_EXPECT_MEMEQ(test, quadlets, expected, sizeof(expected)); +} + +static void test_phy_packet_self_id_zero_and_one(struct kunit *test) +{ + // TSB41LV06A with 6 ports. + const u32 expected[] = { + 0x803f8459, + 0x80815000, + }; + u32 quadlets[] = {0, 0}; + + unsigned int packet_identifier; + unsigned int phy_id; + bool extended; + bool link_is_active; + unsigned int gap_count; + unsigned int scode; + bool is_contender; + unsigned int power_class; + enum phy_packet_self_id_port_status port_status[11]; + bool is_initiated_reset; + bool has_more_packets; + + unsigned int sequence; + unsigned int port_index; + + deserialize_phy_packet_self_id_zero(expected[0], &packet_identifier, &phy_id, &extended, + &link_is_active, &gap_count, &scode, &is_contender, + &power_class, &is_initiated_reset, &has_more_packets); + + KUNIT_EXPECT_EQ(test, PHY_PACKET_PACKET_IDENTIFIER_SELF_ID, packet_identifier); + KUNIT_EXPECT_EQ(test, 0, phy_id); + KUNIT_EXPECT_FALSE(test, extended); + KUNIT_EXPECT_FALSE(test, link_is_active); + KUNIT_EXPECT_EQ(test, 0x3f, gap_count); + KUNIT_EXPECT_EQ(test, SCODE_400, scode); + KUNIT_EXPECT_FALSE(test, is_contender); + KUNIT_EXPECT_EQ(test, 0x4, power_class); + KUNIT_EXPECT_FALSE(test, is_initiated_reset); + KUNIT_EXPECT_TRUE(test, has_more_packets); + + serialize_phy_packet_self_id_zero(quadlets, packet_identifier, phy_id, extended, + link_is_active, gap_count, scode, is_contender, + power_class, is_initiated_reset, has_more_packets); + + deserialize_phy_packet_self_id_extended(expected[1], &packet_identifier, &phy_id, &extended, + &sequence, &has_more_packets); + + KUNIT_EXPECT_EQ(test, PHY_PACKET_PACKET_IDENTIFIER_SELF_ID, packet_identifier); + KUNIT_EXPECT_EQ(test, 0, phy_id); + KUNIT_EXPECT_TRUE(test, extended); + KUNIT_EXPECT_EQ(test, 0, sequence); + KUNIT_EXPECT_FALSE(test, has_more_packets); + + serialize_phy_packet_self_id_extended(&quadlets[1], packet_identifier, phy_id, extended, + sequence, has_more_packets); + + + for (port_index = 0; port_index < ARRAY_SIZE(port_status); ++port_index) { + port_status[port_index] = + self_id_sequence_get_port_status(expected, ARRAY_SIZE(expected), port_index); + } + + KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_NCONN, port_status[0]); + KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_NCONN, port_status[1]); + KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_PARENT, port_status[2]); + KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_NCONN, port_status[3]); + KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_NCONN, port_status[4]); + KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_NCONN, port_status[5]); + KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_NONE, port_status[6]); + KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_NONE, port_status[7]); + KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_NONE, port_status[8]); + KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_NONE, port_status[9]); + KUNIT_EXPECT_EQ(test, PHY_PACKET_SELF_ID_PORT_STATUS_NONE, port_status[10]); + + for (port_index = 0; port_index < ARRAY_SIZE(port_status); ++port_index) { + self_id_sequence_set_port_status(quadlets, ARRAY_SIZE(quadlets), port_index, + port_status[port_index]); + } + + KUNIT_EXPECT_MEMEQ(test, quadlets, expected, sizeof(expected)); +} + static struct kunit_case packet_serdes_test_cases[] = { KUNIT_CASE(test_async_header_write_quadlet_request), KUNIT_CASE(test_async_header_write_block_request), @@ -570,6 +822,9 @@ static struct kunit_case packet_serdes_test_cases[] = { KUNIT_CASE(test_async_header_lock_request), KUNIT_CASE(test_async_header_lock_response), KUNIT_CASE(test_isoc_header), + KUNIT_CASE(test_phy_packet_self_id_zero_case0), + KUNIT_CASE(test_phy_packet_self_id_zero_case1), + KUNIT_CASE(test_phy_packet_self_id_zero_and_one), {} }; diff --git a/drivers/firewire/phy-packet-definitions.h b/drivers/firewire/phy-packet-definitions.h index 4ba8b18aa993..8f78494ad371 100644 --- a/drivers/firewire/phy-packet-definitions.h +++ b/drivers/firewire/phy-packet-definitions.h @@ -7,11 +7,42 @@ #ifndef _FIREWIRE_PHY_PACKET_DEFINITIONS_H #define _FIREWIRE_PHY_PACKET_DEFINITIONS_H +#define PACKET_IDENTIFIER_MASK 0xc0000000 +#define PACKET_IDENTIFIER_SHIFT 30 + +static inline unsigned int phy_packet_get_packet_identifier(u32 quadlet) +{ + return (quadlet & PACKET_IDENTIFIER_MASK) >> PACKET_IDENTIFIER_SHIFT; +} + +static inline void phy_packet_set_packet_identifier(u32 *quadlet, unsigned int packet_identifier) +{ + *quadlet &= ~PACKET_IDENTIFIER_MASK; + *quadlet |= (packet_identifier << PACKET_IDENTIFIER_SHIFT) & PACKET_IDENTIFIER_MASK; +} + +#define PHY_PACKET_PACKET_IDENTIFIER_SELF_ID 2 + +#define SELF_ID_PHY_ID_MASK 0x3f000000 +#define SELF_ID_PHY_ID_SHIFT 24 #define SELF_ID_EXTENDED_MASK 0x00800000 #define SELF_ID_EXTENDED_SHIFT 23 #define SELF_ID_MORE_PACKETS_MASK 0x00000001 #define SELF_ID_MORE_PACKETS_SHIFT 0 +#define SELF_ID_ZERO_LINK_ACTIVE_MASK 0x00400000 +#define SELF_ID_ZERO_LINK_ACTIVE_SHIFT 22 +#define SELF_ID_ZERO_GAP_COUNT_MASK 0x003f0000 +#define SELF_ID_ZERO_GAP_COUNT_SHIFT 16 +#define SELF_ID_ZERO_SCODE_MASK 0x0000c000 +#define SELF_ID_ZERO_SCODE_SHIFT 14 +#define SELF_ID_ZERO_CONTENDER_MASK 0x00000800 +#define SELF_ID_ZERO_CONTENDER_SHIFT 11 +#define SELF_ID_ZERO_POWER_CLASS_MASK 0x00000700 +#define SELF_ID_ZERO_POWER_CLASS_SHIFT 8 +#define SELF_ID_ZERO_INITIATED_RESET_MASK 0x00000002 +#define SELF_ID_ZERO_INITIATED_RESET_SHIFT 1 + #define SELF_ID_EXTENDED_SEQUENCE_MASK 0x00700000 #define SELF_ID_EXTENDED_SEQUENCE_SHIFT 20 @@ -19,21 +50,116 @@ #define SELF_ID_SEQUENCE_MAXIMUM_QUADLET_COUNT 4 +static inline unsigned int phy_packet_self_id_get_phy_id(u32 quadlet) +{ + return (quadlet & SELF_ID_PHY_ID_MASK) >> SELF_ID_PHY_ID_SHIFT; +} + +static inline void phy_packet_self_id_set_phy_id(u32 *quadlet, unsigned int phy_id) +{ + *quadlet &= ~SELF_ID_PHY_ID_MASK; + *quadlet |= (phy_id << SELF_ID_PHY_ID_SHIFT) & SELF_ID_PHY_ID_MASK; +} + static inline bool phy_packet_self_id_get_extended(u32 quadlet) { return (quadlet & SELF_ID_EXTENDED_MASK) >> SELF_ID_EXTENDED_SHIFT; } +static inline void phy_packet_self_id_set_extended(u32 *quadlet, bool extended) +{ + *quadlet &= ~SELF_ID_EXTENDED_MASK; + *quadlet |= (extended << SELF_ID_EXTENDED_SHIFT) & SELF_ID_EXTENDED_MASK; +} + +static inline bool phy_packet_self_id_zero_get_link_active(u32 quadlet) +{ + return (quadlet & SELF_ID_ZERO_LINK_ACTIVE_MASK) >> SELF_ID_ZERO_LINK_ACTIVE_SHIFT; +} + +static inline void phy_packet_self_id_zero_set_link_active(u32 *quadlet, bool is_active) +{ + *quadlet &= ~SELF_ID_ZERO_LINK_ACTIVE_MASK; + *quadlet |= (is_active << SELF_ID_ZERO_LINK_ACTIVE_SHIFT) & SELF_ID_ZERO_LINK_ACTIVE_MASK; +} + +static inline unsigned int phy_packet_self_id_zero_get_gap_count(u32 quadlet) +{ + return (quadlet & SELF_ID_ZERO_GAP_COUNT_MASK) >> SELF_ID_ZERO_GAP_COUNT_SHIFT; +} + +static inline void phy_packet_self_id_zero_set_gap_count(u32 *quadlet, unsigned int gap_count) +{ + *quadlet &= ~SELF_ID_ZERO_GAP_COUNT_MASK; + *quadlet |= (gap_count << SELF_ID_ZERO_GAP_COUNT_SHIFT) & SELF_ID_ZERO_GAP_COUNT_MASK; +} + +static inline unsigned int phy_packet_self_id_zero_get_scode(u32 quadlet) +{ + return (quadlet & SELF_ID_ZERO_SCODE_MASK) >> SELF_ID_ZERO_SCODE_SHIFT; +} + +static inline void phy_packet_self_id_zero_set_scode(u32 *quadlet, unsigned int speed) +{ + *quadlet &= ~SELF_ID_ZERO_SCODE_MASK; + *quadlet |= (speed << SELF_ID_ZERO_SCODE_SHIFT) & SELF_ID_ZERO_SCODE_MASK; +} + +static inline bool phy_packet_self_id_zero_get_contender(u32 quadlet) +{ + return (quadlet & SELF_ID_ZERO_CONTENDER_MASK) >> SELF_ID_ZERO_CONTENDER_SHIFT; +} + +static inline void phy_packet_self_id_zero_set_contender(u32 *quadlet, bool is_contender) +{ + *quadlet &= ~SELF_ID_ZERO_CONTENDER_MASK; + *quadlet |= (is_contender << SELF_ID_ZERO_CONTENDER_SHIFT) & SELF_ID_ZERO_CONTENDER_MASK; +} + +static inline unsigned int phy_packet_self_id_zero_get_power_class(u32 quadlet) +{ + return (quadlet & SELF_ID_ZERO_POWER_CLASS_MASK) >> SELF_ID_ZERO_POWER_CLASS_SHIFT; +} + +static inline void phy_packet_self_id_zero_set_power_class(u32 *quadlet, unsigned int power_class) +{ + *quadlet &= ~SELF_ID_ZERO_POWER_CLASS_MASK; + *quadlet |= (power_class << SELF_ID_ZERO_POWER_CLASS_SHIFT) & SELF_ID_ZERO_POWER_CLASS_MASK; +} + +static inline bool phy_packet_self_id_zero_get_initiated_reset(u32 quadlet) +{ + return (quadlet & SELF_ID_ZERO_INITIATED_RESET_MASK) >> SELF_ID_ZERO_INITIATED_RESET_SHIFT; +} + +static inline void phy_packet_self_id_zero_set_initiated_reset(u32 *quadlet, bool is_initiated_reset) +{ + *quadlet &= ~SELF_ID_ZERO_INITIATED_RESET_MASK; + *quadlet |= (is_initiated_reset << SELF_ID_ZERO_INITIATED_RESET_SHIFT) & SELF_ID_ZERO_INITIATED_RESET_MASK; +} + static inline bool phy_packet_self_id_get_more_packets(u32 quadlet) { return (quadlet & SELF_ID_MORE_PACKETS_MASK) >> SELF_ID_MORE_PACKETS_SHIFT; } +static inline void phy_packet_self_id_set_more_packets(u32 *quadlet, bool is_more_packets) +{ + *quadlet &= ~SELF_ID_MORE_PACKETS_MASK; + *quadlet |= (is_more_packets << SELF_ID_MORE_PACKETS_SHIFT) & SELF_ID_MORE_PACKETS_MASK; +} + static inline unsigned int phy_packet_self_id_extended_get_sequence(u32 quadlet) { return (quadlet & SELF_ID_EXTENDED_SEQUENCE_MASK) >> SELF_ID_EXTENDED_SEQUENCE_SHIFT; } +static inline void phy_packet_self_id_extended_set_sequence(u32 *quadlet, unsigned int sequence) +{ + *quadlet &= ~SELF_ID_EXTENDED_SEQUENCE_MASK; + *quadlet |= (sequence << SELF_ID_EXTENDED_SHIFT) & SELF_ID_EXTENDED_SEQUENCE_MASK; +} + struct self_id_sequence_enumerator { const u32 *cursor; unsigned int quadlet_count; |