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Diffstat (limited to 'target/linux/layerscape/patches-4.4/7152-staging-fsl-mc-Added-DPRC-interrupt-handler.patch')
-rw-r--r--target/linux/layerscape/patches-4.4/7152-staging-fsl-mc-Added-DPRC-interrupt-handler.patch301
1 files changed, 0 insertions, 301 deletions
diff --git a/target/linux/layerscape/patches-4.4/7152-staging-fsl-mc-Added-DPRC-interrupt-handler.patch b/target/linux/layerscape/patches-4.4/7152-staging-fsl-mc-Added-DPRC-interrupt-handler.patch
deleted file mode 100644
index 61b7ee71e1..0000000000
--- a/target/linux/layerscape/patches-4.4/7152-staging-fsl-mc-Added-DPRC-interrupt-handler.patch
+++ /dev/null
@@ -1,301 +0,0 @@
-From aa83997b14c31b34d9af24cb42726b55fa630464 Mon Sep 17 00:00:00 2001
-From: "J. German Rivera" <German.Rivera@freescale.com>
-Date: Wed, 6 Jan 2016 16:03:28 -0600
-Subject: [PATCH 152/226] staging: fsl-mc: Added DPRC interrupt handler
-
-The interrupt handler for DPRC IRQs is added. DPRC IRQs are
-generated for hot plug events related to DPAA2 objects in a given
-DPRC. These events include, creating/destroying DPAA2 objects in
-the DPRC, changing the "plugged" state of DPAA2 objects and moving
-objects between DPRCs.
-
-Signed-off-by: J. German Rivera <German.Rivera@freescale.com>
-Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
----
- drivers/staging/fsl-mc/bus/dprc-driver.c | 247 ++++++++++++++++++++++++++++++
- 1 file changed, 247 insertions(+)
-
---- a/drivers/staging/fsl-mc/bus/dprc-driver.c
-+++ b/drivers/staging/fsl-mc/bus/dprc-driver.c
-@@ -14,6 +14,7 @@
- #include <linux/module.h>
- #include <linux/slab.h>
- #include <linux/interrupt.h>
-+#include <linux/msi.h>
- #include "dprc-cmd.h"
-
- struct dprc_child_objs {
-@@ -386,6 +387,230 @@ error:
- EXPORT_SYMBOL_GPL(dprc_scan_container);
-
- /**
-+ * dprc_irq0_handler - Regular ISR for DPRC interrupt 0
-+ *
-+ * @irq: IRQ number of the interrupt being handled
-+ * @arg: Pointer to device structure
-+ */
-+static irqreturn_t dprc_irq0_handler(int irq_num, void *arg)
-+{
-+ return IRQ_WAKE_THREAD;
-+}
-+
-+/**
-+ * dprc_irq0_handler_thread - Handler thread function for DPRC interrupt 0
-+ *
-+ * @irq: IRQ number of the interrupt being handled
-+ * @arg: Pointer to device structure
-+ */
-+static irqreturn_t dprc_irq0_handler_thread(int irq_num, void *arg)
-+{
-+ int error;
-+ u32 status;
-+ struct device *dev = (struct device *)arg;
-+ struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
-+ struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_dev);
-+ struct fsl_mc_io *mc_io = mc_dev->mc_io;
-+ struct msi_desc *msi_desc = mc_dev->irqs[0]->msi_desc;
-+
-+ dev_dbg(dev, "DPRC IRQ %d triggered on CPU %u\n",
-+ irq_num, smp_processor_id());
-+
-+ if (WARN_ON(!(mc_dev->flags & FSL_MC_IS_DPRC)))
-+ return IRQ_HANDLED;
-+
-+ mutex_lock(&mc_bus->scan_mutex);
-+ if (WARN_ON(!msi_desc || msi_desc->irq != (u32)irq_num))
-+ goto out;
-+
-+ error = dprc_get_irq_status(mc_io, 0, mc_dev->mc_handle, 0,
-+ &status);
-+ if (error < 0) {
-+ dev_err(dev,
-+ "dprc_get_irq_status() failed: %d\n", error);
-+ goto out;
-+ }
-+
-+ error = dprc_clear_irq_status(mc_io, 0, mc_dev->mc_handle, 0,
-+ status);
-+ if (error < 0) {
-+ dev_err(dev,
-+ "dprc_clear_irq_status() failed: %d\n", error);
-+ goto out;
-+ }
-+
-+ if (status & (DPRC_IRQ_EVENT_OBJ_ADDED |
-+ DPRC_IRQ_EVENT_OBJ_REMOVED |
-+ DPRC_IRQ_EVENT_CONTAINER_DESTROYED |
-+ DPRC_IRQ_EVENT_OBJ_DESTROYED |
-+ DPRC_IRQ_EVENT_OBJ_CREATED)) {
-+ unsigned int irq_count;
-+
-+ error = dprc_scan_objects(mc_dev, &irq_count);
-+ if (error < 0) {
-+ /*
-+ * If the error is -ENXIO, we ignore it, as it indicates
-+ * that the object scan was aborted, as we detected that
-+ * an object was removed from the DPRC in the MC, while
-+ * we were scanning the DPRC.
-+ */
-+ if (error != -ENXIO) {
-+ dev_err(dev, "dprc_scan_objects() failed: %d\n",
-+ error);
-+ }
-+
-+ goto out;
-+ }
-+
-+ if (irq_count > FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS) {
-+ dev_warn(dev,
-+ "IRQs needed (%u) exceed IRQs preallocated (%u)\n",
-+ irq_count, FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS);
-+ }
-+ }
-+
-+out:
-+ mutex_unlock(&mc_bus->scan_mutex);
-+ return IRQ_HANDLED;
-+}
-+
-+/*
-+ * Disable and clear interrupt for a given DPRC object
-+ */
-+static int disable_dprc_irq(struct fsl_mc_device *mc_dev)
-+{
-+ int error;
-+ struct fsl_mc_io *mc_io = mc_dev->mc_io;
-+
-+ WARN_ON(mc_dev->obj_desc.irq_count != 1);
-+
-+ /*
-+ * Disable generation of interrupt, while we configure it:
-+ */
-+ error = dprc_set_irq_enable(mc_io, 0, mc_dev->mc_handle, 0, 0);
-+ if (error < 0) {
-+ dev_err(&mc_dev->dev,
-+ "Disabling DPRC IRQ failed: dprc_set_irq_enable() failed: %d\n",
-+ error);
-+ return error;
-+ }
-+
-+ /*
-+ * Disable all interrupt causes for the interrupt:
-+ */
-+ error = dprc_set_irq_mask(mc_io, 0, mc_dev->mc_handle, 0, 0x0);
-+ if (error < 0) {
-+ dev_err(&mc_dev->dev,
-+ "Disabling DPRC IRQ failed: dprc_set_irq_mask() failed: %d\n",
-+ error);
-+ return error;
-+ }
-+
-+ /*
-+ * Clear any leftover interrupts:
-+ */
-+ error = dprc_clear_irq_status(mc_io, 0, mc_dev->mc_handle, 0, ~0x0U);
-+ if (error < 0) {
-+ dev_err(&mc_dev->dev,
-+ "Disabling DPRC IRQ failed: dprc_clear_irq_status() failed: %d\n",
-+ error);
-+ return error;
-+ }
-+
-+ return 0;
-+}
-+
-+static int register_dprc_irq_handler(struct fsl_mc_device *mc_dev)
-+{
-+ int error;
-+ struct fsl_mc_device_irq *irq = mc_dev->irqs[0];
-+
-+ WARN_ON(mc_dev->obj_desc.irq_count != 1);
-+
-+ /*
-+ * NOTE: devm_request_threaded_irq() invokes the device-specific
-+ * function that programs the MSI physically in the device
-+ */
-+ error = devm_request_threaded_irq(&mc_dev->dev,
-+ irq->msi_desc->irq,
-+ dprc_irq0_handler,
-+ dprc_irq0_handler_thread,
-+ IRQF_NO_SUSPEND | IRQF_ONESHOT,
-+ "FSL MC DPRC irq0",
-+ &mc_dev->dev);
-+ if (error < 0) {
-+ dev_err(&mc_dev->dev,
-+ "devm_request_threaded_irq() failed: %d\n",
-+ error);
-+ return error;
-+ }
-+
-+ return 0;
-+}
-+
-+static int enable_dprc_irq(struct fsl_mc_device *mc_dev)
-+{
-+ int error;
-+
-+ /*
-+ * Enable all interrupt causes for the interrupt:
-+ */
-+ error = dprc_set_irq_mask(mc_dev->mc_io, 0, mc_dev->mc_handle, 0,
-+ ~0x0u);
-+ if (error < 0) {
-+ dev_err(&mc_dev->dev,
-+ "Enabling DPRC IRQ failed: dprc_set_irq_mask() failed: %d\n",
-+ error);
-+
-+ return error;
-+ }
-+
-+ /*
-+ * Enable generation of the interrupt:
-+ */
-+ error = dprc_set_irq_enable(mc_dev->mc_io, 0, mc_dev->mc_handle, 0, 1);
-+ if (error < 0) {
-+ dev_err(&mc_dev->dev,
-+ "Enabling DPRC IRQ failed: dprc_set_irq_enable() failed: %d\n",
-+ error);
-+
-+ return error;
-+ }
-+
-+ return 0;
-+}
-+
-+/*
-+ * Setup interrupt for a given DPRC device
-+ */
-+static int dprc_setup_irq(struct fsl_mc_device *mc_dev)
-+{
-+ int error;
-+
-+ error = fsl_mc_allocate_irqs(mc_dev);
-+ if (error < 0)
-+ return error;
-+
-+ error = disable_dprc_irq(mc_dev);
-+ if (error < 0)
-+ goto error_free_irqs;
-+
-+ error = register_dprc_irq_handler(mc_dev);
-+ if (error < 0)
-+ goto error_free_irqs;
-+
-+ error = enable_dprc_irq(mc_dev);
-+ if (error < 0)
-+ goto error_free_irqs;
-+
-+ return 0;
-+
-+error_free_irqs:
-+ fsl_mc_free_irqs(mc_dev);
-+ return error;
-+}
-+
-+/**
- * dprc_probe - callback invoked when a DPRC is being bound to this driver
- *
- * @mc_dev: Pointer to fsl-mc device representing a DPRC
-@@ -476,6 +701,13 @@ static int dprc_probe(struct fsl_mc_devi
- if (error < 0)
- goto error_cleanup_open;
-
-+ /*
-+ * Configure interrupt for the DPRC object associated with this MC bus:
-+ */
-+ error = dprc_setup_irq(mc_dev);
-+ if (error < 0)
-+ goto error_cleanup_open;
-+
- dev_info(&mc_dev->dev, "DPRC device bound to driver");
- return 0;
-
-@@ -494,6 +726,15 @@ error_cleanup_msi_domain:
- return error;
- }
-
-+/*
-+ * Tear down interrupt for a given DPRC object
-+ */
-+static void dprc_teardown_irq(struct fsl_mc_device *mc_dev)
-+{
-+ (void)disable_dprc_irq(mc_dev);
-+ fsl_mc_free_irqs(mc_dev);
-+}
-+
- /**
- * dprc_remove - callback invoked when a DPRC is being unbound from this driver
- *
-@@ -514,6 +755,12 @@ static int dprc_remove(struct fsl_mc_dev
- if (WARN_ON(!mc_dev->mc_io))
- return -EINVAL;
-
-+ if (WARN_ON(!mc_bus->irq_resources))
-+ return -EINVAL;
-+
-+ if (dev_get_msi_domain(&mc_dev->dev))
-+ dprc_teardown_irq(mc_dev);
-+
- device_for_each_child(&mc_dev->dev, NULL, __fsl_mc_device_remove);
- dprc_cleanup_all_resource_pools(mc_dev);
- error = dprc_close(mc_dev->mc_io, 0, mc_dev->mc_handle);
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-07 03:12:34 +0000