[PATCH net-next 8/8] net: ipa: add IPA v5.0 packet status support

Alex Elder
2023-01-25T20:46:35Z

Update ipa_status_extract() to support IPA v5.0 and beyond. Because
the format of the IPA packet status depends on the version, pass an
IPA pointer to the function.

Signed-off-by: Alex Elder <elder@linaro.org>
---
drivers/net/ipa/ipa_endpoint.c | 52 +++++++++++++++++++++++-----------
1 file changed, 36 insertions(+), 16 deletions(-)

diff --git a/drivers/net/ipa/ipa_endpoint.c b/drivers/net/ipa/ipa_endpoint.c
index 3f6c3e2b6ec95..ce7f2d6e447ed 100644
--- a/drivers/net/ipa/ipa_endpoint.c
+++ b/drivers/net/ipa/ipa_endpoint.c
@@ -122,8 +122,10 @@ enum ipa_status_field_id {
#define IPA_STATUS_SIZE sizeof(__le32[4])

/* IPA status structure decoder; looks up field values for a structure */
-static u32 ipa_status_extract(const void *data, enum ipa_status_field_id field)
+static u32 ipa_status_extract(struct ipa *ipa, const void *data,
+ enum ipa_status_field_id field)
{
+ enum ipa_version version = ipa->version;
const __le32 *word = data;

switch (field) {
@@ -136,10 +138,15 @@ static u32 ipa_status_extract(const void *data, enum ipa_status_field_id field)
case STATUS_LENGTH:
return le32_get_bits(word[1], GENMASK(15, 0));
case STATUS_SRC_ENDPOINT:
- return le32_get_bits(word[1], GENMASK(20, 16));
- /* Status word 1, bits 21-23 are reserved */
+ if (version < IPA_VERSION_5_0)
+ return le32_get_bits(word[1], GENMASK(20, 16));
+ return le32_get_bits(word[1], GENMASK(23, 16));
+ /* Status word 1, bits 21-23 are reserved (not IPA v5.0+) */
+ /* Status word 1, bits 24-26 are reserved (IPA v5.0+) */
case STATUS_DST_ENDPOINT:
- return le32_get_bits(word[1], GENMASK(28, 24));
+ if (version < IPA_VERSION_5_0)
+ return le32_get_bits(word[1], GENMASK(28, 24));
+ return le32_get_bits(word[7], GENMASK(23, 16));
/* Status word 1, bits 29-31 are reserved */
case STATUS_METADATA:
return le32_to_cpu(word[2]);
@@ -153,14 +160,23 @@ static u32 ipa_status_extract(const void *data, enum ipa_status_field_id field)
return le32_get_bits(word[3], GENMASK(3, 3));
case STATUS_FILTER_RULE_INDEX:
return le32_get_bits(word[3], GENMASK(13, 4));
+ /* ROUTER_TABLE is in word 3, bits 14-21 (IPA v5.0+) */
case STATUS_ROUTER_LOCAL:
- return le32_get_bits(word[3], GENMASK(14, 14));
+ if (version < IPA_VERSION_5_0)
+ return le32_get_bits(word[3], GENMASK(14, 14));
+ return le32_get_bits(word[1], GENMASK(27, 27));
case STATUS_ROUTER_HASH:
- return le32_get_bits(word[3], GENMASK(15, 15));
+ if (version < IPA_VERSION_5_0)
+ return le32_get_bits(word[3], GENMASK(15, 15));
+ return le32_get_bits(word[1], GENMASK(28, 28));
case STATUS_UCP:
- return le32_get_bits(word[3], GENMASK(16, 16));
+ if (version < IPA_VERSION_5_0)
+ return le32_get_bits(word[3], GENMASK(16, 16));
+ return le32_get_bits(word[7], GENMASK(31, 31));
case STATUS_ROUTER_TABLE:
- return le32_get_bits(word[3], GENMASK(21, 17));
+ if (version < IPA_VERSION_5_0)
+ return le32_get_bits(word[3], GENMASK(21, 17));
+ return le32_get_bits(word[3], GENMASK(21, 14));
case STATUS_ROUTER_RULE_INDEX:
return le32_get_bits(word[3], GENMASK(31, 22));
case STATUS_NAT_HIT:
@@ -186,7 +202,8 @@ static u32 ipa_status_extract(const void *data, enum ipa_status_field_id field)
return le32_get_bits(word[7], GENMASK(11, 11));
case STATUS_FRAG_RULE_INDEX:
return le32_get_bits(word[7], GENMASK(15, 12));
- /* Status word 7, bits 16-31 are reserved */
+ /* Status word 7, bits 16-30 are reserved */
+ /* Status word 7, bit 31 is reserved (not IPA v5.0+) */
default:
WARN(true, "%s: bad field_id %u\n", __func__, field);
return 0;
@@ -1444,14 +1461,15 @@ static bool ipa_status_format_packet(enum ipa_status_opcode opcode)
static bool
ipa_endpoint_status_skip(struct ipa_endpoint *endpoint, const void *data)
{
+ struct ipa *ipa = endpoint->ipa;
enum ipa_status_opcode opcode;
u32 endpoint_id;

- opcode = ipa_status_extract(data, STATUS_OPCODE);
+ opcode = ipa_status_extract(ipa, data, STATUS_OPCODE);
if (!ipa_status_format_packet(opcode))
return true;

- endpoint_id = ipa_status_extract(data, STATUS_DST_ENDPOINT);
+ endpoint_id = ipa_status_extract(ipa, data, STATUS_DST_ENDPOINT);
if (endpoint_id != endpoint->endpoint_id)
return true;

@@ -1466,7 +1484,7 @@ ipa_endpoint_status_tag_valid(struct ipa_endpoint *endpoint, const void *data)
struct ipa *ipa = endpoint->ipa;
u32 endpoint_id;

- status_mask = ipa_status_extract(data, STATUS_MASK);
+ status_mask = ipa_status_extract(ipa, data, STATUS_MASK);
if (!status_mask)
return false; /* No valid tag */

@@ -1475,7 +1493,7 @@ ipa_endpoint_status_tag_valid(struct ipa_endpoint *endpoint, const void *data)
* If the packet came from the AP->command TX endpoint we know
* this packet was sent as part of the pipeline clear process.
*/
- endpoint_id = ipa_status_extract(data, STATUS_SRC_ENDPOINT);
+ endpoint_id = ipa_status_extract(ipa, data, STATUS_SRC_ENDPOINT);
command_endpoint = ipa->name_map[IPA_ENDPOINT_AP_COMMAND_TX];
if (endpoint_id == command_endpoint->endpoint_id) {
complete(&ipa->completion);
@@ -1493,6 +1511,7 @@ static bool
ipa_endpoint_status_drop(struct ipa_endpoint *endpoint, const void *data)
{
enum ipa_status_exception exception;
+ struct ipa *ipa = endpoint->ipa;
u32 rule;

/* If the status indicates a tagged transfer, we'll drop the packet */
@@ -1500,12 +1519,12 @@ ipa_endpoint_status_drop(struct ipa_endpoint *endpoint, const void *data)
return true;

/* Deaggregation exceptions we drop; all other types we consume */
- exception = ipa_status_extract(data, STATUS_EXCEPTION);
+ exception = ipa_status_extract(ipa, data, STATUS_EXCEPTION);
if (exception)
return exception == IPA_STATUS_EXCEPTION_DEAGGR;

/* Drop the packet if it fails to match a routing rule; otherwise no */
- rule = ipa_status_extract(data, STATUS_ROUTER_RULE_INDEX);
+ rule = ipa_status_extract(ipa, data, STATUS_ROUTER_RULE_INDEX);

return rule == IPA_STATUS_RULE_MISS;
}
@@ -1516,6 +1535,7 @@ static void ipa_endpoint_status_parse(struct ipa_endpoint *endpoint,
u32 buffer_size = endpoint->config.rx.buffer_size;
void *data = page_address(page) + NET_SKB_PAD;
u32 unused = buffer_size - total_len;
+ struct ipa *ipa = endpoint->ipa;
u32 resid = total_len;

while (resid) {
@@ -1531,7 +1551,7 @@ static void ipa_endpoint_status_parse(struct ipa_endpoint *endpoint,
}

/* Skip over status packets that lack packet data */
- length = ipa_status_extract(data, STATUS_LENGTH);
+ length = ipa_status_extract(ipa, data, STATUS_LENGTH);
if (!length || ipa_endpoint_status_skip(endpoint, data)) {
data += IPA_STATUS_SIZE;
resid -= IPA_STATUS_SIZE;
--
2.34.1