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firewire: core: add tests for serialization/deserialization of phy config packet

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In the protocol of IEEE 1394, phy configuration packet is broadcasted to
the bus to configure all PHYs residing on the bus. It includes two
purposes; selecting root node and optimizing gap count.

This commit adds some helper function to serialize/deserialize the
content of phy configuration packet, as well as some KUnit tests for it.

Link: https://lore.kernel.org/r/20240606235133.231543-2-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
This commit is contained in:
Takashi Sakamoto 2024-06-07 08:51:32 +09:00
parent 677ceae190
commit 75d47101fa
2 changed files with 134 additions and 0 deletions
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79
drivers/firewire/packet-serdes-test.c
View File

@ -248,6 +248,29 @@ static void deserialize_phy_packet_self_id_extended(u32 quadlet, unsigned int *p
*has_more_packets = phy_packet_self_id_get_more_packets(quadlet);
}
static void serialize_phy_packet_phy_config(u32 *quadlet, unsigned int packet_identifier,
unsigned int root_id, bool has_force_root_node,
bool has_gap_count_optimization, unsigned int gap_count)
{
phy_packet_set_packet_identifier(quadlet, packet_identifier);
phy_packet_phy_config_set_root_id(quadlet, root_id);
phy_packet_phy_config_set_force_root_node(quadlet, has_force_root_node);
phy_packet_phy_config_set_gap_count_optimization(quadlet, has_gap_count_optimization);
phy_packet_phy_config_set_gap_count(quadlet, gap_count);
}
static void deserialize_phy_packet_phy_config(u32 quadlet, unsigned int *packet_identifier,
unsigned int *root_id, bool *has_force_root_node,
bool *has_gap_count_optimization,
unsigned int *gap_count)
{
*packet_identifier = phy_packet_get_packet_identifier(quadlet);
*root_id = phy_packet_phy_config_get_root_id(quadlet);
*has_force_root_node = phy_packet_phy_config_get_force_root_node(quadlet);
*has_gap_count_optimization = phy_packet_phy_config_get_gap_count_optimization(quadlet);
*gap_count = phy_packet_phy_config_get_gap_count(quadlet);
}
static void test_async_header_write_quadlet_request(struct kunit *test)
{
static const u32 expected[ASYNC_HEADER_QUADLET_COUNT] = {
@ -811,6 +834,60 @@ static void test_phy_packet_self_id_zero_and_one(struct kunit *test)
KUNIT_EXPECT_MEMEQ(test, quadlets, expected, sizeof(expected));
}
static void test_phy_packet_phy_config_force_root_node(struct kunit *test)
{
const u32 expected = 0x02800000;
u32 quadlet = 0;
unsigned int packet_identifier;
unsigned int root_id;
bool has_force_root_node;
bool has_gap_count_optimization;
unsigned int gap_count;
deserialize_phy_packet_phy_config(expected, &packet_identifier, &root_id,
&has_force_root_node, &has_gap_count_optimization,
&gap_count);
KUNIT_EXPECT_EQ(test, PHY_PACKET_PACKET_IDENTIFIER_PHY_CONFIG, packet_identifier);
KUNIT_EXPECT_EQ(test, 0x02, root_id);
KUNIT_EXPECT_TRUE(test, has_force_root_node);
KUNIT_EXPECT_FALSE(test, has_gap_count_optimization);
KUNIT_EXPECT_EQ(test, 0, gap_count);
serialize_phy_packet_phy_config(&quadlet, packet_identifier, root_id, has_force_root_node,
has_gap_count_optimization, gap_count);
KUNIT_EXPECT_EQ(test, quadlet, expected);
}
static void test_phy_packet_phy_config_gap_count_optimization(struct kunit *test)
{
const u32 expected = 0x034f0000;
u32 quadlet = 0;
unsigned int packet_identifier;
unsigned int root_id;
bool has_force_root_node;
bool has_gap_count_optimization;
unsigned int gap_count;
deserialize_phy_packet_phy_config(expected, &packet_identifier, &root_id,
&has_force_root_node, &has_gap_count_optimization,
&gap_count);
KUNIT_EXPECT_EQ(test, PHY_PACKET_PACKET_IDENTIFIER_PHY_CONFIG, packet_identifier);
KUNIT_EXPECT_EQ(test, 0x03, root_id);
KUNIT_EXPECT_FALSE(test, has_force_root_node);
KUNIT_EXPECT_TRUE(test, has_gap_count_optimization);
KUNIT_EXPECT_EQ(test, 0x0f, gap_count);
serialize_phy_packet_phy_config(&quadlet, packet_identifier, root_id, has_force_root_node,
has_gap_count_optimization, gap_count);
KUNIT_EXPECT_EQ(test, quadlet, 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),
@ -825,6 +902,8 @@ static struct kunit_case packet_serdes_test_cases[] = {
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),
KUNIT_CASE(test_phy_packet_phy_config_force_root_node),
KUNIT_CASE(test_phy_packet_phy_config_gap_count_optimization),
{}
};

55
drivers/firewire/phy-packet-definitions.h
View File

@ -21,6 +21,61 @@ static inline void phy_packet_set_packet_identifier(u32 *quadlet, unsigned int p
*quadlet |= (packet_identifier << PACKET_IDENTIFIER_SHIFT) & PACKET_IDENTIFIER_MASK;
}
#define PHY_PACKET_PACKET_IDENTIFIER_PHY_CONFIG 0
#define PHY_CONFIG_ROOT_ID_MASK 0x3f000000
#define PHY_CONFIG_ROOT_ID_SHIFT 24
#define PHY_CONFIG_FORCE_ROOT_NODE_MASK 0x00800000
#define PHY_CONFIG_FORCE_ROOT_NODE_SHIFT 23
#define PHY_CONFIG_GAP_COUNT_OPTIMIZATION_MASK 0x00400000
#define PHY_CONFIG_GAP_COUNT_OPTIMIZATION_SHIFT 22
#define PHY_CONFIG_GAP_COUNT_MASK 0x003f0000
#define PHY_CONFIG_GAP_COUNT_SHIFT 16
static inline unsigned int phy_packet_phy_config_get_root_id(u32 quadlet)
{
return (quadlet & PHY_CONFIG_ROOT_ID_MASK) >> PHY_CONFIG_ROOT_ID_SHIFT;
}
static inline void phy_packet_phy_config_set_root_id(u32 *quadlet, unsigned int root_id)
{
*quadlet &= ~PHY_CONFIG_ROOT_ID_MASK;
*quadlet |= (root_id << PHY_CONFIG_ROOT_ID_SHIFT) & PHY_CONFIG_ROOT_ID_MASK;
}
static inline bool phy_packet_phy_config_get_force_root_node(u32 quadlet)
{
return (quadlet & PHY_CONFIG_FORCE_ROOT_NODE_MASK) >> PHY_CONFIG_FORCE_ROOT_NODE_SHIFT;
}
static inline void phy_packet_phy_config_set_force_root_node(u32 *quadlet, bool has_force_root_node)
{
*quadlet &= ~PHY_CONFIG_FORCE_ROOT_NODE_MASK;
*quadlet |= (has_force_root_node << PHY_CONFIG_FORCE_ROOT_NODE_SHIFT) & PHY_CONFIG_FORCE_ROOT_NODE_MASK;
}
static inline bool phy_packet_phy_config_get_gap_count_optimization(u32 quadlet)
{
return (quadlet & PHY_CONFIG_GAP_COUNT_OPTIMIZATION_MASK) >> PHY_CONFIG_GAP_COUNT_OPTIMIZATION_SHIFT;
}
static inline void phy_packet_phy_config_set_gap_count_optimization(u32 *quadlet, bool has_gap_count_optimization)
{
*quadlet &= ~PHY_CONFIG_GAP_COUNT_OPTIMIZATION_MASK;
*quadlet |= (has_gap_count_optimization << PHY_CONFIG_GAP_COUNT_OPTIMIZATION_SHIFT) & PHY_CONFIG_GAP_COUNT_OPTIMIZATION_MASK;
}
static inline unsigned int phy_packet_phy_config_get_gap_count(u32 quadlet)
{
return (quadlet & PHY_CONFIG_GAP_COUNT_MASK) >> PHY_CONFIG_GAP_COUNT_SHIFT;
}
static inline void phy_packet_phy_config_set_gap_count(u32 *quadlet, unsigned int gap_count)
{
*quadlet &= ~PHY_CONFIG_GAP_COUNT_MASK;
*quadlet |= (gap_count << PHY_CONFIG_GAP_COUNT_SHIFT) & PHY_CONFIG_GAP_COUNT_MASK;
}
#define PHY_PACKET_PACKET_IDENTIFIER_SELF_ID 2
#define SELF_ID_PHY_ID_MASK 0x3f000000