Merging upstream version 6.7.7.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

7 files changed, 83 insertions, 23 deletions

diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c
index 0e9ff5500a..95caa16270 100644
--- a/drivers/i3c/master.c
+++ b/drivers/i3c/master.c
@@ -22,6 +22,7 @@
 static DEFINE_IDR(i3c_bus_idr);
 static DEFINE_MUTEX(i3c_core_lock);
 static int __i3c_first_dynamic_bus_num;
+static BLOCKING_NOTIFIER_HEAD(i3c_bus_notifier);
 
 /**
  * i3c_bus_maintenance_lock - Lock the bus for a maintenance operation
@@ -453,6 +454,36 @@ static int i3c_bus_init(struct i3c_bus *i3cbus, struct device_node *np)
 	return 0;
 }
 
+void i3c_for_each_bus_locked(int (*fn)(struct i3c_bus *bus, void *data),
+			     void *data)
+{
+	struct i3c_bus *bus;
+	int id;
+
+	mutex_lock(&i3c_core_lock);
+	idr_for_each_entry(&i3c_bus_idr, bus, id)
+		fn(bus, data);
+	mutex_unlock(&i3c_core_lock);
+}
+EXPORT_SYMBOL_GPL(i3c_for_each_bus_locked);
+
+int i3c_register_notifier(struct notifier_block *nb)
+{
+	return blocking_notifier_chain_register(&i3c_bus_notifier, nb);
+}
+EXPORT_SYMBOL_GPL(i3c_register_notifier);
+
+int i3c_unregister_notifier(struct notifier_block *nb)
+{
+	return blocking_notifier_chain_unregister(&i3c_bus_notifier, nb);
+}
+EXPORT_SYMBOL_GPL(i3c_unregister_notifier);
+
+static void i3c_bus_notify(struct i3c_bus *bus, unsigned int action)
+{
+	blocking_notifier_call_chain(&i3c_bus_notifier, action, bus);
+}
+
 static const char * const i3c_bus_mode_strings[] = {
 	[I3C_BUS_MODE_PURE] = "pure",
 	[I3C_BUS_MODE_MIXED_FAST] = "mixed-fast",
@@ -2311,7 +2342,7 @@ static int i3c_master_i2c_adapter_init(struct i3c_master_controller *master)
 	adap->dev.parent = master->dev.parent;
 	adap->owner = master->dev.parent->driver->owner;
 	adap->algo = &i3c_master_i2c_algo;
-	strncpy(adap->name, dev_name(master->dev.parent), sizeof(adap->name));
+	strscpy(adap->name, dev_name(master->dev.parent), sizeof(adap->name));
 
 	/* FIXME: Should we allow i3c masters to override these values? */
 	adap->timeout = 1000;
@@ -2374,7 +2405,7 @@ static void i3c_master_unregister_i3c_devs(struct i3c_master_controller *master)
 void i3c_master_queue_ibi(struct i3c_dev_desc *dev, struct i3c_ibi_slot *slot)
 {
 	atomic_inc(&dev->ibi->pending_ibis);
-	queue_work(dev->common.master->wq, &slot->work);
+	queue_work(dev->ibi->wq, &slot->work);
 }
 EXPORT_SYMBOL_GPL(i3c_master_queue_ibi);
 
@@ -2631,6 +2662,10 @@ int i3c_master_register(struct i3c_master_controller *master,
 	device_initialize(&master->dev);
 	dev_set_name(&master->dev, "i3c-%d", i3cbus->id);
 
+	master->dev.dma_mask = parent->dma_mask;
+	master->dev.coherent_dma_mask = parent->coherent_dma_mask;
+	master->dev.dma_parms = parent->dma_parms;
+
 	ret = of_populate_i3c_bus(master);
 	if (ret)
 		goto err_put_dev;
@@ -2684,6 +2719,8 @@ int i3c_master_register(struct i3c_master_controller *master,
 	if (ret)
 		goto err_del_dev;
 
+	i3c_bus_notify(i3cbus, I3C_NOTIFY_BUS_ADD);
+
 	/*
 	 * We're done initializing the bus and the controller, we can now
 	 * register I3C devices discovered during the initial DAA.
@@ -2716,6 +2753,8 @@ EXPORT_SYMBOL_GPL(i3c_master_register);
  */
 void i3c_master_unregister(struct i3c_master_controller *master)
 {
+	i3c_bus_notify(&master->bus, I3C_NOTIFY_BUS_REMOVE);
+
 	i3c_master_i2c_adapter_cleanup(master);
 	i3c_master_unregister_i3c_devs(master);
 	i3c_master_bus_cleanup(master);
@@ -2815,6 +2854,12 @@ int i3c_dev_request_ibi_locked(struct i3c_dev_desc *dev,
 	if (!ibi)
 		return -ENOMEM;
 
+	ibi->wq = alloc_ordered_workqueue(dev_name(i3cdev_to_dev(dev->dev)), WQ_MEM_RECLAIM);
+	if (!ibi->wq) {
+		kfree(ibi);
+		return -ENOMEM;
+	}
+
 	atomic_set(&ibi->pending_ibis, 0);
 	init_completion(&ibi->all_ibis_handled);
 	ibi->handler = req->handler;
@@ -2842,6 +2887,12 @@ void i3c_dev_free_ibi_locked(struct i3c_dev_desc *dev)
 		WARN_ON(i3c_dev_disable_ibi_locked(dev));
 
 	master->ops->free_ibi(dev);
+
+	if (dev->ibi->wq) {
+		destroy_workqueue(dev->ibi->wq);
+		dev->ibi->wq = NULL;
+	}
+
 	kfree(dev->ibi);
 	dev->ibi = NULL;
 }
diff --git a/drivers/i3c/master/dw-i3c-master.c b/drivers/i3c/master/dw-i3c-master.c
index 9332ae5f64..ef5751e91c 100644
--- a/drivers/i3c/master/dw-i3c-master.c
+++ b/drivers/i3c/master/dw-i3c-master.c
@@ -233,7 +233,7 @@ struct dw_i3c_xfer {
 	struct completion comp;
 	int ret;
 	unsigned int ncmds;
-	struct dw_i3c_cmd cmds[];
+	struct dw_i3c_cmd cmds[] __counted_by(ncmds);
 };
 
 struct dw_i3c_i2c_dev_data {
diff --git a/drivers/i3c/master/i3c-master-cdns.c b/drivers/i3c/master/i3c-master-cdns.c
index 8f1fda3c7a..c1627f3552 100644
--- a/drivers/i3c/master/i3c-master-cdns.c
+++ b/drivers/i3c/master/i3c-master-cdns.c
@@ -76,7 +76,8 @@
 #define PRESCL_CTRL0			0x14
 #define PRESCL_CTRL0_I2C(x)		((x) << 16)
 #define PRESCL_CTRL0_I3C(x)		(x)
-#define PRESCL_CTRL0_MAX		GENMASK(9, 0)
+#define PRESCL_CTRL0_I3C_MAX		GENMASK(9, 0)
+#define PRESCL_CTRL0_I2C_MAX		GENMASK(15, 0)
 
 #define PRESCL_CTRL1			0x18
 #define PRESCL_CTRL1_PP_LOW_MASK	GENMASK(15, 8)
@@ -387,7 +388,7 @@ struct cdns_i3c_xfer {
 	struct completion comp;
 	int ret;
 	unsigned int ncmds;
-	struct cdns_i3c_cmd cmds[];
+	struct cdns_i3c_cmd cmds[] __counted_by(ncmds);
 };
 
 struct cdns_i3c_data {
@@ -1233,7 +1234,7 @@ static int cdns_i3c_master_bus_init(struct i3c_master_controller *m)
 		return -EINVAL;
 
 	pres = DIV_ROUND_UP(sysclk_rate, (bus->scl_rate.i3c * 4)) - 1;
-	if (pres > PRESCL_CTRL0_MAX)
+	if (pres > PRESCL_CTRL0_I3C_MAX)
 		return -ERANGE;
 
 	bus->scl_rate.i3c = sysclk_rate / ((pres + 1) * 4);
@@ -1246,7 +1247,7 @@ static int cdns_i3c_master_bus_init(struct i3c_master_controller *m)
 	max_i2cfreq = bus->scl_rate.i2c;
 
 	pres = (sysclk_rate / (max_i2cfreq * 5)) - 1;
-	if (pres > PRESCL_CTRL0_MAX)
+	if (pres > PRESCL_CTRL0_I2C_MAX)
 		return -ERANGE;
 
 	bus->scl_rate.i2c = sysclk_rate / ((pres + 1) * 5);
diff --git a/drivers/i3c/master/mipi-i3c-hci/cmd_v1.c b/drivers/i3c/master/mipi-i3c-hci/cmd_v1.c
index 6a781f89b0..2b2323aa67 100644
--- a/drivers/i3c/master/mipi-i3c-hci/cmd_v1.c
+++ b/drivers/i3c/master/mipi-i3c-hci/cmd_v1.c
@@ -332,6 +332,7 @@ static int hci_cmd_v1_daa(struct i3c_hci *hci)
 			CMD_A0_DEV_COUNT(1) |
 			CMD_A0_ROC | CMD_A0_TOC;
 		xfer->cmd_desc[1] = 0;
+		xfer->completion = &done;
 		hci->io->queue_xfer(hci, xfer, 1);
 		if (!wait_for_completion_timeout(&done, HZ) &&
 		    hci->io->dequeue_xfer(hci, xfer, 1)) {
diff --git a/drivers/i3c/master/mipi-i3c-hci/core.c b/drivers/i3c/master/mipi-i3c-hci/core.c
index 837af83c85..1ae56a5699 100644
--- a/drivers/i3c/master/mipi-i3c-hci/core.c
+++ b/drivers/i3c/master/mipi-i3c-hci/core.c
@@ -161,10 +161,12 @@ static int i3c_hci_bus_init(struct i3c_master_controller *m)
 static void i3c_hci_bus_cleanup(struct i3c_master_controller *m)
 {
 	struct i3c_hci *hci = to_i3c_hci(m);
+	struct platform_device *pdev = to_platform_device(m->dev.parent);
 
 	DBG("");
 
 	reg_clear(HC_CONTROL, HC_CONTROL_BUS_ENABLE);
+	synchronize_irq(platform_get_irq(pdev, 0));
 	hci->io->cleanup(hci);
 	if (hci->cmd == &mipi_i3c_hci_cmd_v1)
 		mipi_i3c_hci_dat_v1.cleanup(hci);
@@ -172,8 +174,7 @@ static void i3c_hci_bus_cleanup(struct i3c_master_controller *m)
 
 void mipi_i3c_hci_resume(struct i3c_hci *hci)
 {
-	/* the HC_CONTROL_RESUME bit is R/W1C so just read and write back */
-	reg_write(HC_CONTROL, reg_read(HC_CONTROL));
+	reg_set(HC_CONTROL, HC_CONTROL_RESUME);
 }
 
 /* located here rather than pio.c because needed bits are in core reg space */
@@ -610,17 +611,17 @@ static int i3c_hci_init(struct i3c_hci *hci)
 	offset = FIELD_GET(DAT_TABLE_OFFSET, regval);
 	hci->DAT_regs = offset ? hci->base_regs + offset : NULL;
 	hci->DAT_entries = FIELD_GET(DAT_TABLE_SIZE, regval);
-	hci->DAT_entry_size = FIELD_GET(DAT_ENTRY_SIZE, regval);
+	hci->DAT_entry_size = FIELD_GET(DAT_ENTRY_SIZE, regval) ? 0 : 8;
 	dev_info(&hci->master.dev, "DAT: %u %u-bytes entries at offset %#x\n",
-		 hci->DAT_entries, hci->DAT_entry_size * 4, offset);
+		 hci->DAT_entries, hci->DAT_entry_size, offset);
 
 	regval = reg_read(DCT_SECTION);
 	offset = FIELD_GET(DCT_TABLE_OFFSET, regval);
 	hci->DCT_regs = offset ? hci->base_regs + offset : NULL;
 	hci->DCT_entries = FIELD_GET(DCT_TABLE_SIZE, regval);
-	hci->DCT_entry_size = FIELD_GET(DCT_ENTRY_SIZE, regval);
+	hci->DCT_entry_size = FIELD_GET(DCT_ENTRY_SIZE, regval) ? 0 : 16;
 	dev_info(&hci->master.dev, "DCT: %u %u-bytes entries at offset %#x\n",
-		 hci->DCT_entries, hci->DCT_entry_size * 4, offset);
+		 hci->DCT_entries, hci->DCT_entry_size, offset);
 
 	regval = reg_read(RING_HEADERS_SECTION);
 	offset = FIELD_GET(RING_HEADERS_OFFSET, regval);
@@ -787,6 +788,7 @@ static struct platform_driver i3c_hci_driver = {
 	},
 };
 module_platform_driver(i3c_hci_driver);
+MODULE_ALIAS("platform:mipi-i3c-hci");
 
 MODULE_AUTHOR("Nicolas Pitre <npitre@baylibre.com>");
 MODULE_DESCRIPTION("MIPI I3C HCI driver");
diff --git a/drivers/i3c/master/mipi-i3c-hci/dma.c b/drivers/i3c/master/mipi-i3c-hci/dma.c
index 71b5dbe45c..c805a84973 100644
--- a/drivers/i3c/master/mipi-i3c-hci/dma.c
+++ b/drivers/i3c/master/mipi-i3c-hci/dma.c
@@ -139,7 +139,7 @@ struct hci_rh_data {
 
 struct hci_rings_data {
 	unsigned int total;
-	struct hci_rh_data headers[];
+	struct hci_rh_data headers[] __counted_by(total);
 };
 
 struct hci_dma_dev_ibi_data {
@@ -229,6 +229,9 @@ static int hci_dma_init(struct i3c_hci *hci)
 	hci->io_data = rings;
 	rings->total = nr_rings;
 
+	regval = FIELD_PREP(MAX_HEADER_COUNT, rings->total);
+	rhs_reg_write(CONTROL, regval);
+
 	for (i = 0; i < rings->total; i++) {
 		u32 offset = rhs_reg_read(RHn_OFFSET(i));
 
@@ -325,11 +328,10 @@ static int hci_dma_init(struct i3c_hci *hci)
 		rh_reg_write(INTR_SIGNAL_ENABLE, regval);
 
 ring_ready:
-		rh_reg_write(RING_CONTROL, RING_CTRL_ENABLE);
+		rh_reg_write(RING_CONTROL, RING_CTRL_ENABLE |
+					   RING_CTRL_RUN_STOP);
 	}
 
-	regval = FIELD_PREP(MAX_HEADER_COUNT, rings->total);
-	rhs_reg_write(CONTROL, regval);
 	return 0;
 
 err_out:
@@ -345,6 +347,8 @@ static void hci_dma_unmap_xfer(struct i3c_hci *hci,
 
 	for (i = 0; i < n; i++) {
 		xfer = xfer_list + i;
+		if (!xfer->data)
+			continue;
 		dma_unmap_single(&hci->master.dev,
 				 xfer->data_dma, xfer->data_len,
 				 xfer->rnw ? DMA_FROM_DEVICE : DMA_TO_DEVICE);
@@ -450,10 +454,9 @@ static bool hci_dma_dequeue_xfer(struct i3c_hci *hci,
 		/*
 		 * We're deep in it if ever this condition is ever met.
 		 * Hardware might still be writing to memory, etc.
-		 * Better suspend the world than risking silent corruption.
 		 */
 		dev_crit(&hci->master.dev, "unable to abort the ring\n");
-		BUG();
+		WARN_ON(1);
 	}
 
 	for (i = 0; i < n; i++) {
@@ -756,9 +759,11 @@ static bool hci_dma_irq_handler(struct i3c_hci *hci, unsigned int mask)
 		if (status & INTR_RING_OP)
 			complete(&rh->op_done);
 
-		if (status & INTR_TRANSFER_ABORT)
+		if (status & INTR_TRANSFER_ABORT) {
 			dev_notice_ratelimited(&hci->master.dev,
 				"ring %d: Transfer Aborted\n", i);
+			mipi_i3c_hci_resume(hci);
+		}
 		if (status & INTR_WARN_INS_STOP_MODE)
 			dev_warn_ratelimited(&hci->master.dev,
 				"ring %d: Inserted Stop on Mode Change\n", i);
diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c
index c395e52294..cf703c00f6 100644
--- a/drivers/i3c/master/svc-i3c-master.c
+++ b/drivers/i3c/master/svc-i3c-master.c
@@ -144,7 +144,7 @@ struct svc_i3c_xfer {
 	int ret;
 	unsigned int type;
 	unsigned int ncmds;
-	struct svc_i3c_cmd cmds[];
+	struct svc_i3c_cmd cmds[] __counted_by(ncmds);
 };
 
 struct svc_i3c_regs_save {
@@ -787,7 +787,7 @@ static int svc_i3c_master_do_daa_locked(struct svc_i3c_master *master,
 			u8 data[6];
 
 			/*
-			 * We only care about the 48-bit provisional ID yet to
+			 * We only care about the 48-bit provisioned ID yet to
 			 * be sure a device does not nack an address twice.
 			 * Otherwise, we would just need to flush the RX FIFO.
 			 */
@@ -1703,7 +1703,7 @@ static const struct dev_pm_ops svc_i3c_pm_ops = {
 };
 
 static const struct of_device_id svc_i3c_master_of_match_tbl[] = {
-	{ .compatible = "silvaco,i3c-master" },
+	{ .compatible = "silvaco,i3c-master-v1"},
 	{ /* sentinel */ },
 };
 MODULE_DEVICE_TABLE(of, svc_i3c_master_of_match_tbl);