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path: root/drivers/net/ipa/ipa_endpoint.c
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Diffstat (limited to 'drivers/net/ipa/ipa_endpoint.c')
-rw-r--r--drivers/net/ipa/ipa_endpoint.c82
1 files changed, 57 insertions, 25 deletions
diff --git a/drivers/net/ipa/ipa_endpoint.c b/drivers/net/ipa/ipa_endpoint.c
index 7209ee3c3124..ccc99ad983eb 100644
--- a/drivers/net/ipa/ipa_endpoint.c
+++ b/drivers/net/ipa/ipa_endpoint.c
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
- * Copyright (C) 2019-2020 Linaro Ltd.
+ * Copyright (C) 2019-2021 Linaro Ltd.
*/
#include <linux/types.h>
@@ -88,6 +88,11 @@ static bool ipa_endpoint_data_valid_one(struct ipa *ipa, u32 count,
if (ipa_gsi_endpoint_data_empty(data))
return true;
+ /* IPA v4.5+ uses checksum offload, not yet supported by RMNet */
+ if (ipa->version >= IPA_VERSION_4_5)
+ if (data->endpoint.config.checksum)
+ return false;
+
if (!data->toward_ipa) {
if (data->endpoint.filter_support) {
dev_err(dev, "filtering not supported for "
@@ -230,6 +235,17 @@ static bool ipa_endpoint_data_valid(struct ipa *ipa, u32 count,
static bool ipa_endpoint_data_valid(struct ipa *ipa, u32 count,
const struct ipa_gsi_endpoint_data *data)
{
+ const struct ipa_gsi_endpoint_data *dp = data;
+ enum ipa_endpoint_name name;
+
+ if (ipa->version < IPA_VERSION_4_5)
+ return true;
+
+ /* IPA v4.5+ uses checksum offload, not yet supported by RMNet */
+ for (name = 0; name < count; name++, dp++)
+ if (data->endpoint.config.checksum)
+ return false;
+
return true;
}
@@ -266,7 +282,7 @@ ipa_endpoint_init_ctrl(struct ipa_endpoint *endpoint, bool suspend_delay)
* if (endpoint->toward_ipa)
* assert(ipa->version != IPA_VERSION_4.2);
* else
- * assert(ipa->version == IPA_VERSION_3_5_1);
+ * assert(ipa->version < IPA_VERSION_4_0);
*/
mask = endpoint->toward_ipa ? ENDP_DELAY_FMASK : ENDP_SUSPEND_FMASK;
@@ -347,7 +363,7 @@ ipa_endpoint_program_suspend(struct ipa_endpoint *endpoint, bool enable)
{
bool suspended;
- if (endpoint->ipa->version != IPA_VERSION_3_5_1)
+ if (endpoint->ipa->version >= IPA_VERSION_4_0)
return enable; /* For IPA v4.0+, no change made */
/* assert(!endpoint->toward_ipa); */
@@ -397,7 +413,7 @@ int ipa_endpoint_modem_exception_reset_all(struct ipa *ipa)
/* We need one command per modem TX endpoint. We can get an upper
* bound on that by assuming all initialized endpoints are modem->IPA.
* That won't happen, and we could be more precise, but this is fine
- * for now. We need to end the transaction with a "tag process."
+ * for now. End the transaction with commands to clear the pipeline.
*/
count = hweight32(initialized) + ipa_cmd_pipeline_clear_count();
trans = ipa_cmd_trans_alloc(ipa, count);
@@ -468,6 +484,20 @@ static void ipa_endpoint_init_cfg(struct ipa_endpoint *endpoint)
iowrite32(val, endpoint->ipa->reg_virt + offset);
}
+static void ipa_endpoint_init_nat(struct ipa_endpoint *endpoint)
+{
+ u32 offset;
+ u32 val;
+
+ if (!endpoint->toward_ipa)
+ return;
+
+ offset = IPA_REG_ENDP_INIT_NAT_N_OFFSET(endpoint->endpoint_id);
+ val = u32_encode_bits(IPA_NAT_BYPASS, NAT_EN_FMASK);
+
+ iowrite32(val, endpoint->ipa->reg_virt + offset);
+}
+
/**
* ipa_endpoint_init_hdr() - Initialize HDR endpoint configuration register
* @endpoint: Endpoint pointer
@@ -515,7 +545,7 @@ static void ipa_endpoint_init_hdr(struct ipa_endpoint *endpoint)
/* Where IPA will write the length */
offset = offsetof(struct rmnet_map_header, pkt_len);
/* Upper bits are stored in HDR_EXT with IPA v4.5 */
- if (version == IPA_VERSION_4_5)
+ if (version >= IPA_VERSION_4_5)
offset &= field_mask(HDR_OFST_PKT_SIZE_FMASK);
val |= HDR_OFST_PKT_SIZE_VALID_FMASK;
@@ -562,7 +592,7 @@ static void ipa_endpoint_init_hdr_ext(struct ipa_endpoint *endpoint)
/* IPA v4.5 adds some most-significant bits to a few fields,
* two of which are defined in the HDR (not HDR_EXT) register.
*/
- if (ipa->version == IPA_VERSION_4_5) {
+ if (ipa->version >= IPA_VERSION_4_5) {
/* HDR_TOTAL_LEN_OR_PAD_OFFSET is 0, so MSB is 0 */
if (endpoint->data->qmap && !endpoint->toward_ipa) {
u32 offset;
@@ -776,7 +806,7 @@ static u32 hol_block_timer_val(struct ipa *ipa, u32 microseconds)
if (!microseconds)
return 0; /* Nothing to compute if timer period is 0 */
- if (ipa->version == IPA_VERSION_4_5)
+ if (ipa->version >= IPA_VERSION_4_5)
return hol_block_timer_qtime_val(ipa, microseconds);
/* Use 64 bit arithmetic to avoid overflow... */
@@ -795,7 +825,7 @@ static u32 hol_block_timer_val(struct ipa *ipa, u32 microseconds)
* The best precision is achieved when the base value is as
* large as possible. Find the highest set bit in the tick
* count, and extract the number of bits in the base field
- * such that that high bit is included.
+ * such that high bit is included.
*/
high = fls(ticks); /* 1..32 */
width = HWEIGHT32(BASE_VALUE_FMASK);
@@ -884,18 +914,17 @@ static void ipa_endpoint_init_rsrc_grp(struct ipa_endpoint *endpoint)
static void ipa_endpoint_init_seq(struct ipa_endpoint *endpoint)
{
u32 offset = IPA_REG_ENDP_INIT_SEQ_N_OFFSET(endpoint->endpoint_id);
- u32 seq_type = endpoint->seq_type;
u32 val = 0;
if (!endpoint->toward_ipa)
return; /* Register not valid for RX endpoints */
- /* Sequencer type is made up of four nibbles */
- val |= u32_encode_bits(seq_type & 0xf, HPS_SEQ_TYPE_FMASK);
- val |= u32_encode_bits((seq_type >> 4) & 0xf, DPS_SEQ_TYPE_FMASK);
- /* The second two apply to replicated packets */
- val |= u32_encode_bits((seq_type >> 8) & 0xf, HPS_REP_SEQ_TYPE_FMASK);
- val |= u32_encode_bits((seq_type >> 12) & 0xf, DPS_REP_SEQ_TYPE_FMASK);
+ /* Low-order byte configures primary packet processing */
+ val |= u32_encode_bits(endpoint->data->tx.seq_type, SEQ_TYPE_FMASK);
+
+ /* Second byte configures replicated packet processing */
+ val |= u32_encode_bits(endpoint->data->tx.seq_rep_type,
+ SEQ_REP_TYPE_FMASK);
iowrite32(val, endpoint->ipa->reg_virt + offset);
}
@@ -1435,7 +1464,7 @@ static int ipa_endpoint_reset_rx_aggr(struct ipa_endpoint *endpoint)
if (ret)
goto out_suspend_again;
- /* Finally, reset and reconfigure the channel again (re-enabling the
+ /* Finally, reset and reconfigure the channel again (re-enabling
* the doorbell engine if appropriate). Sleep for 1 millisecond to
* complete the channel reset sequence. Finish by suspending the
* channel again (if necessary).
@@ -1469,8 +1498,7 @@ static void ipa_endpoint_reset(struct ipa_endpoint *endpoint)
* is active, we need to handle things specially to recover.
* All other cases just need to reset the underlying GSI channel.
*/
- special = ipa->version == IPA_VERSION_3_5_1 &&
- !endpoint->toward_ipa &&
+ special = ipa->version < IPA_VERSION_4_0 && !endpoint->toward_ipa &&
endpoint->data->aggregation;
if (special && ipa_endpoint_aggr_active(endpoint))
ret = ipa_endpoint_reset_rx_aggr(endpoint);
@@ -1490,6 +1518,7 @@ static void ipa_endpoint_program(struct ipa_endpoint *endpoint)
else
(void)ipa_endpoint_program_suspend(endpoint, false);
ipa_endpoint_init_cfg(endpoint);
+ ipa_endpoint_init_nat(endpoint);
ipa_endpoint_init_hdr(endpoint);
ipa_endpoint_init_hdr_ext(endpoint);
ipa_endpoint_init_hdr_metadata_mask(endpoint);
@@ -1568,8 +1597,10 @@ void ipa_endpoint_suspend_one(struct ipa_endpoint *endpoint)
(void)ipa_endpoint_program_suspend(endpoint, true);
}
- /* IPA v3.5.1 doesn't use channel stop for suspend */
- stop_channel = endpoint->ipa->version != IPA_VERSION_3_5_1;
+ /* Starting with IPA v4.0, endpoints are suspended by stopping the
+ * underlying GSI channel rather than using endpoint suspend mode.
+ */
+ stop_channel = endpoint->ipa->version >= IPA_VERSION_4_0;
ret = gsi_channel_suspend(gsi, endpoint->channel_id, stop_channel);
if (ret)
dev_err(dev, "error %d suspending channel %u\n", ret,
@@ -1589,8 +1620,10 @@ void ipa_endpoint_resume_one(struct ipa_endpoint *endpoint)
if (!endpoint->toward_ipa)
(void)ipa_endpoint_program_suspend(endpoint, false);
- /* IPA v3.5.1 doesn't use channel start for resume */
- start_channel = endpoint->ipa->version != IPA_VERSION_3_5_1;
+ /* Starting with IPA v4.0, the underlying GSI channel must be
+ * restarted for resume.
+ */
+ start_channel = endpoint->ipa->version >= IPA_VERSION_4_0;
ret = gsi_channel_resume(gsi, endpoint->channel_id, start_channel);
if (ret)
dev_err(dev, "error %d resuming channel %u\n", ret,
@@ -1738,7 +1771,7 @@ int ipa_endpoint_config(struct ipa *ipa)
/* Make sure it's pointing in the right direction */
endpoint = &ipa->endpoint[endpoint_id];
- if ((endpoint_id < rx_base) != !!endpoint->toward_ipa) {
+ if ((endpoint_id < rx_base) != endpoint->toward_ipa) {
dev_err(dev, "endpoint id %u wrong direction\n",
endpoint_id);
ret = -EINVAL;
@@ -1766,7 +1799,6 @@ static void ipa_endpoint_init_one(struct ipa *ipa, enum ipa_endpoint_name name,
endpoint->ipa = ipa;
endpoint->ee_id = data->ee_id;
- endpoint->seq_type = data->endpoint.seq_type;
endpoint->channel_id = data->channel_id;
endpoint->endpoint_id = data->endpoint_id;
endpoint->toward_ipa = data->toward_ipa;
@@ -1775,7 +1807,7 @@ static void ipa_endpoint_init_one(struct ipa *ipa, enum ipa_endpoint_name name,
ipa->initialized |= BIT(endpoint->endpoint_id);
}
-void ipa_endpoint_exit_one(struct ipa_endpoint *endpoint)
+static void ipa_endpoint_exit_one(struct ipa_endpoint *endpoint)
{
endpoint->ipa->initialized &= ~BIT(endpoint->endpoint_id);
generated by cgit v1.2.3 (git 2.39.0) at 2025-10-31 17:18:15 +0300