Stefan Schmidt says:

====================
pull-request: ieee802154-next 2022-05-01

Miquel Raynal landed two patch series bundled in this pull request.

The first series re-works the symbol duration handling to better
accommodate the needs of the various phy layers in ieee802154.

In the second series Miquel improves th errors handling from drivers
up mac802154. THis streamlines the error handling throughout the
ieee/mac802154 stack in preparation for sync TX to be introduced for
MLME frames.
====================

Link: https://lore.kernel.org/r/20220501194614.1198325-1-stefan@datenfreihafen.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 22 insertions, 141 deletions

diff --git a/drivers/net/ieee802154/at86rf230.c b/drivers/net/ieee802154/at86rf230.c
index 549d04b5f3d4..15f283b26721 100644
--- a/drivers/net/ieee802154/at86rf230.c
+++ b/drivers/net/ieee802154/at86rf230.c
@@ -23,7 +23,6 @@
 #include <linux/skbuff.h>
 #include <linux/of_gpio.h>
 #include <linux/ieee802154.h>
-#include <linux/debugfs.h>
 
 #include <net/mac802154.h>
 #include <net/cfg802154.h>
@@ -72,19 +71,11 @@ struct at86rf230_state_change {
 	void (*complete)(void *context);
 	u8 from_state;
 	u8 to_state;
+	int trac;
 
 	bool free;
 };
 
-struct at86rf230_trac {
-	u64 success;
-	u64 success_data_pending;
-	u64 success_wait_for_ack;
-	u64 channel_access_failure;
-	u64 no_ack;
-	u64 invalid;
-};
-
 struct at86rf230_local {
 	struct spi_device *spi;
 
@@ -104,8 +95,6 @@ struct at86rf230_local {
 	u8 tx_retry;
 	struct sk_buff *tx_skb;
 	struct at86rf230_state_change tx;
-
-	struct at86rf230_trac trac;
 };
 
 #define AT86RF2XX_NUMREGS 0x3F
@@ -346,8 +335,7 @@ at86rf230_async_error_recover_complete(void *context)
 
 	if (lp->was_tx) {
 		lp->was_tx = 0;
-		dev_kfree_skb_any(lp->tx_skb);
-		ieee802154_wake_queue(lp->hw);
+		ieee802154_xmit_hw_error(lp->hw, lp->tx_skb);
 	}
 }
 
@@ -653,7 +641,11 @@ at86rf230_tx_complete(void *context)
 	struct at86rf230_state_change *ctx = context;
 	struct at86rf230_local *lp = ctx->lp;
 
-	ieee802154_xmit_complete(lp->hw, lp->tx_skb, false);
+	if (ctx->trac == IEEE802154_SUCCESS)
+		ieee802154_xmit_complete(lp->hw, lp->tx_skb, false);
+	else
+		ieee802154_xmit_error(lp->hw, lp->tx_skb, ctx->trac);
+
 	kfree(ctx);
 }
 
@@ -672,30 +664,21 @@ at86rf230_tx_trac_check(void *context)
 {
 	struct at86rf230_state_change *ctx = context;
 	struct at86rf230_local *lp = ctx->lp;
+	u8 trac = TRAC_MASK(ctx->buf[1]);
 
-	if (IS_ENABLED(CONFIG_IEEE802154_AT86RF230_DEBUGFS)) {
-		u8 trac = TRAC_MASK(ctx->buf[1]);
-
-		switch (trac) {
-		case TRAC_SUCCESS:
-			lp->trac.success++;
-			break;
-		case TRAC_SUCCESS_DATA_PENDING:
-			lp->trac.success_data_pending++;
-			break;
-		case TRAC_CHANNEL_ACCESS_FAILURE:
-			lp->trac.channel_access_failure++;
-			break;
-		case TRAC_NO_ACK:
-			lp->trac.no_ack++;
-			break;
-		case TRAC_INVALID:
-			lp->trac.invalid++;
-			break;
-		default:
-			WARN_ONCE(1, "received tx trac status %d\n", trac);
-			break;
-		}
+	switch (trac) {
+	case TRAC_SUCCESS:
+	case TRAC_SUCCESS_DATA_PENDING:
+		ctx->trac = IEEE802154_SUCCESS;
+		break;
+	case TRAC_CHANNEL_ACCESS_FAILURE:
+		ctx->trac = IEEE802154_CHANNEL_ACCESS_FAILURE;
+		break;
+	case TRAC_NO_ACK:
+		ctx->trac = IEEE802154_NO_ACK;
+		break;
+	default:
+		ctx->trac = IEEE802154_SYSTEM_ERROR;
 	}
 
 	at86rf230_async_state_change(lp, ctx, STATE_TX_ON, at86rf230_tx_on);
@@ -737,25 +720,6 @@ at86rf230_rx_trac_check(void *context)
 	u8 *buf = ctx->buf;
 	int rc;
 
-	if (IS_ENABLED(CONFIG_IEEE802154_AT86RF230_DEBUGFS)) {
-		u8 trac = TRAC_MASK(buf[1]);
-
-		switch (trac) {
-		case TRAC_SUCCESS:
-			lp->trac.success++;
-			break;
-		case TRAC_SUCCESS_WAIT_FOR_ACK:
-			lp->trac.success_wait_for_ack++;
-			break;
-		case TRAC_INVALID:
-			lp->trac.invalid++;
-			break;
-		default:
-			WARN_ONCE(1, "received rx trac status %d\n", trac);
-			break;
-		}
-	}
-
 	buf[0] = CMD_FB;
 	ctx->trx.len = AT86RF2XX_MAX_BUF;
 	ctx->msg.complete = at86rf230_rx_read_frame_complete;
@@ -951,10 +915,6 @@ at86rf230_start(struct ieee802154_hw *hw)
 {
 	struct at86rf230_local *lp = hw->priv;
 
-	/* reset trac stats on start */
-	if (IS_ENABLED(CONFIG_IEEE802154_AT86RF230_DEBUGFS))
-		memset(&lp->trac, 0, sizeof(struct at86rf230_trac));
-
 	at86rf230_awake(lp);
 	enable_irq(lp->spi->irq);
 
@@ -1064,36 +1024,6 @@ at86rf212_set_channel(struct at86rf230_local *lp, u8 page, u8 channel)
 	if (rc < 0)
 		return rc;
 
-	/* This sets the symbol_duration according frequency on the 212.
-	 * TODO move this handling while set channel and page in cfg802154.
-	 * We can do that, this timings are according 802.15.4 standard.
-	 * If we do that in cfg802154, this is a more generic calculation.
-	 *
-	 * This should also protected from ifs_timer. Means cancel timer and
-	 * init with a new value. For now, this is okay.
-	 */
-	if (channel == 0) {
-		if (page == 0) {
-			/* SUB:0 and BPSK:0 -> BPSK-20 */
-			lp->hw->phy->symbol_duration = 50;
-		} else {
-			/* SUB:1 and BPSK:0 -> BPSK-40 */
-			lp->hw->phy->symbol_duration = 25;
-		}
-	} else {
-		if (page == 0)
-			/* SUB:0 and BPSK:1 -> OQPSK-100/200/400 */
-			lp->hw->phy->symbol_duration = 40;
-		else
-			/* SUB:1 and BPSK:1 -> OQPSK-250/500/1000 */
-			lp->hw->phy->symbol_duration = 16;
-	}
-
-	lp->hw->phy->lifs_period = IEEE802154_LIFS_PERIOD *
-				   lp->hw->phy->symbol_duration;
-	lp->hw->phy->sifs_period = IEEE802154_SIFS_PERIOD *
-				   lp->hw->phy->symbol_duration;
-
 	return at86rf230_write_subreg(lp, SR_CHANNEL, channel);
 }
 
@@ -1569,7 +1499,6 @@ at86rf230_detect_device(struct at86rf230_local *lp)
 		lp->data = &at86rf231_data;
 		lp->hw->phy->supported.channels[0] = 0x7FFF800;
 		lp->hw->phy->current_channel = 11;
-		lp->hw->phy->symbol_duration = 16;
 		lp->hw->phy->supported.tx_powers = at86rf231_powers;
 		lp->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf231_powers);
 		lp->hw->phy->supported.cca_ed_levels = at86rf231_ed_levels;
@@ -1582,7 +1511,6 @@ at86rf230_detect_device(struct at86rf230_local *lp)
 		lp->hw->phy->supported.channels[0] = 0x00007FF;
 		lp->hw->phy->supported.channels[2] = 0x00007FF;
 		lp->hw->phy->current_channel = 5;
-		lp->hw->phy->symbol_duration = 25;
 		lp->hw->phy->supported.lbt = NL802154_SUPPORTED_BOOL_BOTH;
 		lp->hw->phy->supported.tx_powers = at86rf212_powers;
 		lp->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf212_powers);
@@ -1594,7 +1522,6 @@ at86rf230_detect_device(struct at86rf230_local *lp)
 		lp->data = &at86rf233_data;
 		lp->hw->phy->supported.channels[0] = 0x7FFF800;
 		lp->hw->phy->current_channel = 13;
-		lp->hw->phy->symbol_duration = 16;
 		lp->hw->phy->supported.tx_powers = at86rf233_powers;
 		lp->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf233_powers);
 		lp->hw->phy->supported.cca_ed_levels = at86rf233_ed_levels;
@@ -1615,47 +1542,6 @@ not_supp:
 	return rc;
 }
 
-#ifdef CONFIG_IEEE802154_AT86RF230_DEBUGFS
-static struct dentry *at86rf230_debugfs_root;
-
-static int at86rf230_stats_show(struct seq_file *file, void *offset)
-{
-	struct at86rf230_local *lp = file->private;
-
-	seq_printf(file, "SUCCESS:\t\t%8llu\n", lp->trac.success);
-	seq_printf(file, "SUCCESS_DATA_PENDING:\t%8llu\n",
-		   lp->trac.success_data_pending);
-	seq_printf(file, "SUCCESS_WAIT_FOR_ACK:\t%8llu\n",
-		   lp->trac.success_wait_for_ack);
-	seq_printf(file, "CHANNEL_ACCESS_FAILURE:\t%8llu\n",
-		   lp->trac.channel_access_failure);
-	seq_printf(file, "NO_ACK:\t\t\t%8llu\n", lp->trac.no_ack);
-	seq_printf(file, "INVALID:\t\t%8llu\n", lp->trac.invalid);
-	return 0;
-}
-DEFINE_SHOW_ATTRIBUTE(at86rf230_stats);
-
-static void at86rf230_debugfs_init(struct at86rf230_local *lp)
-{
-	char debugfs_dir_name[DNAME_INLINE_LEN + 1] = "at86rf230-";
-
-	strncat(debugfs_dir_name, dev_name(&lp->spi->dev), DNAME_INLINE_LEN);
-
-	at86rf230_debugfs_root = debugfs_create_dir(debugfs_dir_name, NULL);
-
-	debugfs_create_file("trac_stats", 0444, at86rf230_debugfs_root, lp,
-			    &at86rf230_stats_fops);
-}
-
-static void at86rf230_debugfs_remove(void)
-{
-	debugfs_remove_recursive(at86rf230_debugfs_root);
-}
-#else
-static void at86rf230_debugfs_init(struct at86rf230_local *lp) { }
-static void at86rf230_debugfs_remove(void) { }
-#endif
-
 static int at86rf230_probe(struct spi_device *spi)
 {
 	struct ieee802154_hw *hw;
@@ -1752,16 +1638,12 @@ static int at86rf230_probe(struct spi_device *spi)
 	/* going into sleep by default */
 	at86rf230_sleep(lp);
 
-	at86rf230_debugfs_init(lp);
-
 	rc = ieee802154_register_hw(lp->hw);
 	if (rc)
-		goto free_debugfs;
+		goto free_dev;
 
 	return rc;
 
-free_debugfs:
-	at86rf230_debugfs_remove();
 free_dev:
 	ieee802154_free_hw(lp->hw);
 
@@ -1776,7 +1658,6 @@ static void at86rf230_remove(struct spi_device *spi)
 	at86rf230_write_subreg(lp, SR_IRQ_MASK, 0);
 	ieee802154_unregister_hw(lp->hw);
 	ieee802154_free_hw(lp->hw);
-	at86rf230_debugfs_remove();
 	dev_dbg(&spi->dev, "unregistered at86rf230\n");
 }