link to v6:
https://lore.kernel.org/all/20230913111644.29889-4-hnagalla@xxxxxx/
drivers/remoteproc/Makefile | 2 +-
drivers/remoteproc/ti_k3_common.c | 583 ++++++++++
drivers/remoteproc/ti_k3_dsp_remoteproc.c | 1277 ++++++---------------
3 files changed, 952 insertions(+), 910 deletions(-)
create mode 100644 drivers/remoteproc/ti_k3_common.c
rewrite drivers/remoteproc/ti_k3_dsp_remoteproc.c (67%)
diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
index 91314a9b43ce..55c552e27a45 100644
--- a/drivers/remoteproc/Makefile
+++ b/drivers/remoteproc/Makefile
@@ -36,6 +36,6 @@ obj-$(CONFIG_RCAR_REMOTEPROC) += rcar_rproc.o
obj-$(CONFIG_ST_REMOTEPROC) += st_remoteproc.o
obj-$(CONFIG_ST_SLIM_REMOTEPROC) += st_slim_rproc.o
obj-$(CONFIG_STM32_RPROC) += stm32_rproc.o
-obj-$(CONFIG_TI_K3_DSP_REMOTEPROC) += ti_k3_dsp_remoteproc.o
+obj-$(CONFIG_TI_K3_DSP_REMOTEPROC) += ti_k3_dsp_remoteproc.o ti_k3_common.o
obj-$(CONFIG_TI_K3_R5_REMOTEPROC) += ti_k3_r5_remoteproc.o
obj-$(CONFIG_XLNX_R5_REMOTEPROC) += xlnx_r5_remoteproc.o
diff --git a/drivers/remoteproc/ti_k3_common.c b/drivers/remoteproc/ti_k3_common.c
new file mode 100644
index 000000000000..62c7c5dba78a
--- /dev/null
+++ b/drivers/remoteproc/ti_k3_common.c
@@ -0,0 +1,583 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * TI K3 Remote Processor(s) driver common code
+ *
+ * Refactored from ti_k3_dsp_remoteproc.c.
+ *
+ * ti_k3_dsp_remoteproc.c:
+ * Copyright (C) 2018-2022 Texas Instruments Incorporated - https://www.ti.com/
+ * Suman Anna <s-anna@xxxxxx>
+ */
+
+#include <linux/io.h>
+#include <linux/mailbox_client.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/of_reserved_mem.h>
+#include <linux/omap-mailbox.h>
+#include <linux/platform_device.h>
+#include <linux/remoteproc.h>
+#include <linux/reset.h>
+#include <linux/slab.h>
+
+#include "omap_remoteproc.h"
+#include "remoteproc_internal.h"
+#include "ti_sci_proc.h"
+#include "ti_k3_common.h"
+
+/**
+ * k3_rproc_mbox_callback() - inbound mailbox message handler
+ * @client: mailbox client pointer used for requesting the mailbox channel
+ * @data: mailbox payload
+ *
+ * This handler is invoked by the K3 mailbox driver whenever a mailbox
+ * message is received. Usually, the mailbox payload simply contains
+ * the index of the virtqueue that is kicked by the remote processor,
+ * and we let remoteproc core handle it.
+ *
+ * In addition to virtqueue indices, we also have some out-of-band values
+ * that indicate different events. Those values are deliberately very
+ * large so they don't coincide with virtqueue indices.
+ */
+static void k3_rproc_mbox_callback(struct mbox_client *client, void *data)
+{
+ struct k3_rproc *kproc = container_of(client, struct k3_rproc,
+ client);
+ struct device *dev = kproc->rproc->dev.parent;
+ const char *name = kproc->rproc->name;
+ u32 msg = omap_mbox_message(data);
+
+ dev_dbg(dev, "mbox msg: 0x%x\n", msg);
+
+ switch (msg) {
+ case RP_MBOX_CRASH:
+ /*
+ * remoteproc detected an exception, but error recovery is not
+ * supported. So, just log this for now
+ */
+ dev_err(dev, "K3 rproc %s crashed\n", name);
+ break;
+ case RP_MBOX_ECHO_REPLY:
+ dev_info(dev, "received echo reply from %s\n", name);
+ break;
+ default:
+ /* silently handle all other valid messages */
+ if (msg >= RP_MBOX_READY && msg < RP_MBOX_END_MSG)
+ return;
+ if (msg > kproc->rproc->max_notifyid) {
+ dev_dbg(dev, "dropping unknown message 0x%x", msg);
+ return;
+ }
+ /* msg contains the index of the triggered vring */
+ if (rproc_vq_interrupt(kproc->rproc, msg) == IRQ_NONE)
+ dev_dbg(dev, "no message was found in vqid %d\n", msg);
+ }
+}
+
+/*
+ * Kick the remote processor to notify about pending unprocessed messages.
+ * The vqid usage is not used and is inconsequential, as the kick is performed
+ * through a simulated GPIO (a bit in an IPC interrupt-triggering register),
+ * the remote processor is expected to process both its Tx and Rx virtqueues.
+ */
+void k3_rproc_kick(struct rproc *rproc, int vqid)
+{
+ struct k3_rproc *kproc = rproc->priv;
+ struct device *dev = rproc->dev.parent;
+ mbox_msg_t msg = (mbox_msg_t)vqid;
+ int ret;
+
+ /* send the index of the triggered virtqueue in the mailbox payload */
+ ret = mbox_send_message(kproc->mbox, (void *)msg);
+ if (ret < 0)
+ dev_err(dev, "failed to send mailbox message, status = %d\n",
+ ret);
+}
+EXPORT_SYMBOL_GPL(k3_rproc_kick);
+
+/* Put the remote processor into reset */
+int k3_rproc_reset(struct k3_rproc *kproc)
+{
+ struct device *dev = kproc->dev;
+ int ret;
+
+ ret = reset_control_assert(kproc->reset);
+ if (ret) {
+ dev_err(dev, "local-reset assert failed, ret = %d\n", ret);
+ return ret;
+ }
+
+ if (kproc->data->uses_lreset)
+ return ret;
+
+ ret = kproc->ti_sci->ops.dev_ops.put_device(kproc->ti_sci,
+ kproc->ti_sci_id);
+ if (ret) {
+ dev_err(dev, "module-reset assert failed, ret = %d\n", ret);
+ if (reset_control_deassert(kproc->reset))
+ dev_warn(dev, "local-reset deassert back failed\n");
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(k3_rproc_reset);
+
+/* Release the remote processor from reset */
+int k3_rproc_release(struct k3_rproc *kproc)
+{
+ struct device *dev = kproc->dev;
+ int ret;
+
+ if (kproc->data->uses_lreset)
+ goto lreset;
+
+ ret = kproc->ti_sci->ops.dev_ops.get_device(kproc->ti_sci,
+ kproc->ti_sci_id);
+ if (ret) {
+ dev_err(dev, "module-reset deassert failed, ret = %d\n", ret);
+ return ret;
+ }
+
+lreset:
+ ret = reset_control_deassert(kproc->reset);
+ if (ret) {
+ dev_err(dev, "local-reset deassert failed, ret = %d\n", ret);
+ if (kproc->ti_sci->ops.dev_ops.put_device(kproc->ti_sci,
+ kproc->ti_sci_id))
+ dev_warn(dev, "module-reset assert back failed\n");
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(k3_rproc_release);
+
+int k3_rproc_request_mbox(struct rproc *rproc)
+{
+ struct k3_rproc *kproc = rproc->priv;
+ struct mbox_client *client = &kproc->client;
+ struct device *dev = kproc->dev;
+ int ret;
+
+ client->dev = dev;
+ client->tx_done = NULL;
+ client->rx_callback = k3_rproc_mbox_callback;
+ client->tx_block = false;
+ client->knows_txdone = false;
+
+ kproc->mbox = mbox_request_channel(client, 0);
+ if (IS_ERR(kproc->mbox)) {
+ ret = -EBUSY;
+ dev_err(dev, "mbox_request_channel failed: %ld\n",
+ PTR_ERR(kproc->mbox));
+ return ret;
+ }
+
+ /*
+ * Ping the remote processor, this is only for sanity-sake for now;
+ * there is no functional effect whatsoever.
+ *
+ * Note that the reply will _not_ arrive immediately: this message
+ * will wait in the mailbox fifo until the remote processor is booted.
+ */
+ ret = mbox_send_message(kproc->mbox, (void *)RP_MBOX_ECHO_REQUEST);
+ if (ret < 0) {
+ dev_err(dev, "mbox_send_message failed: %d\n", ret);
+ mbox_free_channel(kproc->mbox);
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(k3_rproc_request_mbox);
+
+/*
+ * The DSP and MCU cores have a local reset that affects only the CPU, and a
+ * generic module reset that powers on the device and allows the internal
+ * memories to be accessed while the local reset is asserted. This function is
+ * used to release the global reset on remote cores to allow loading into the
+ * internal RAMs. The .prepare() ops is invoked by remoteproc core before any
+ * firmware loading, and is followed by the .start() ops after loading to
+ * actually let the remote cores to run. This callback is invoked only in
+ * remoteproc mode.
+ */
+int k3_rproc_prepare(struct rproc *rproc)
+{
+ struct k3_rproc *kproc = rproc->priv;
+ struct device *dev = kproc->dev;
+ int ret;
+
+ ret = kproc->ti_sci->ops.dev_ops.get_device(kproc->ti_sci,
+ kproc->ti_sci_id);
+ if (ret)
+ dev_err(dev, "module-reset deassert failed, cannot enable internal RAM loading, ret = %d\n",
+ ret);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(k3_rproc_prepare);
+
+/*
+ * This function implements the .unprepare() ops and performs the complimentary
+ * operations to that of the .prepare() ops. The function is used to assert the
+ * global reset on applicable DSP, MCU cores. This completes the second portion of
+ * powering down the remote core. The cores themselves are only halted in the
+ * .stop() callback through the local reset, and the .unprepare() ops is invoked
+ * by the remoteproc core after the remoteproc is stopped to balance the global
+ * reset. This callback is invoked only in remoteproc mode.
+ */
+int k3_rproc_unprepare(struct rproc *rproc)
+{
+ struct k3_rproc *kproc = rproc->priv;
+ struct device *dev = kproc->dev;
+ int ret;
+
+ ret = kproc->ti_sci->ops.dev_ops.put_device(kproc->ti_sci,
+ kproc->ti_sci_id);
+ if (ret)
+ dev_err(dev, "module-reset assert failed, ret = %d\n", ret);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(k3_rproc_unprepare);
+
+/*
+ * This function implements the .get_loaded_rsc_table() callback and is used
+ * to provide the resource table for a booted remote processor in IPC-only
+ * mode. The remote processor firmwares follow a design-by-contract approach
+ * and are expected to have the resource table at the base of the DDR region
+ * reserved for firmware usage. This provides flexibility for the remote
+ * processor to be booted by different bootloaders that may or may not have the
+ * ability to publish the resource table address and size through a DT
+ * property.
+ */
+struct resource_table *k3_get_loaded_rsc_table(struct rproc *rproc,
+ size_t *rsc_table_sz)
+{
+ struct k3_rproc *kproc = rproc->priv;
+ struct device *dev = kproc->dev;
+
+ if (!kproc->rmem[0].cpu_addr) {
+ dev_err(dev, "memory-region #1 does not exist, loaded rsc table can't be found");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ /*
+ * NOTE: The resource table size is currently hard-coded to a maximum
+ * of 256 bytes. The most common resource table usage for K3 firmwares
+ * is to only have the vdev resource entry and an optional trace entry.
+ * The exact size could be computed based on resource table address, but
+ * the hard-coded value suffices to support the IPC-only mode.
+ */
+ *rsc_table_sz = 256;
+ return (struct resource_table *)kproc->rmem[0].cpu_addr;
+}
+EXPORT_SYMBOL_GPL(k3_get_loaded_rsc_table);
+
+/*
+ * Custom function to translate a remote processor device address (internal
+ * RAMs only) to a kernel virtual address. The remote processors can access
+ * their RAMs at either an internal address visible only from a remote
+ * processor, or at the SoC-level bus address. Both these addresses need to be
+ * looked through for translation. The translated addresses can be used either
+ * by the remoteproc core for loading (when using kernel remoteproc loader), or
+ * by any rpmsg bus drivers.
+ */
+void *k3_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
+{
+ struct k3_rproc *kproc = rproc->priv;
+ void __iomem *va = NULL;
+ phys_addr_t bus_addr;
+ u32 dev_addr, offset;
+ size_t size;
+ int i;
+
+ if (len == 0)
+ return NULL;
+
+ for (i = 0; i < kproc->num_mems; i++) {
+ bus_addr = kproc->mem[i].bus_addr;
+ dev_addr = kproc->mem[i].dev_addr;
+ size = kproc->mem[i].size;
+
+ if (da < KEYSTONE_RPROC_LOCAL_ADDRESS_MASK) {
+ /* handle remote-view addresses */
+ if (da >= dev_addr &&
+ ((da + len) <= (dev_addr + size))) {
+ offset = da - dev_addr;
+ va = kproc->mem[i].cpu_addr + offset;
+ return (__force void *)va;
+ }
+ } else {
+ /* handle SoC-view addresses */
+ if (da >= bus_addr &&
+ (da + len) <= (bus_addr + size)) {
+ offset = da - bus_addr;
+ va = kproc->mem[i].cpu_addr + offset;
+ return (__force void *)va;
+ }
+ }
+ }
+
+ /* handle any SRAM regions using SoC-view addresses */
+ for (i = 0; i < kproc->num_sram; i++) {
+ dev_addr = kproc->sram[i].dev_addr;
+ size = kproc->sram[i].size;
+
+ if (da >= dev_addr && ((da + len) <= (dev_addr + size))) {
+ offset = da - dev_addr;
+ va = kproc->sram[i].cpu_addr + offset;
+ return (__force void *)va;
+ }
+ }
+
+ /* handle static DDR reserved memory regions */
+ for (i = 0; i < kproc->num_rmems; i++) {
+ dev_addr = kproc->rmem[i].dev_addr;
+ size = kproc->rmem[i].size;
+
+ if (da >= dev_addr && ((da + len) <= (dev_addr + size))) {
+ offset = da - dev_addr;
+ va = kproc->rmem[i].cpu_addr + offset;
+ return (__force void *)va;
+ }
+ }
+
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(k3_rproc_da_to_va);
+
+int k3_rproc_of_get_memories(struct platform_device *pdev,
+ struct k3_rproc *kproc)
+{
+ const struct k3_rproc_dev_data *data = kproc->data;
+ struct device *dev = &pdev->dev;
+ struct resource *res;
+ int num_mems = 0;
+ int i;
+
+ num_mems = kproc->data->num_mems;
+ kproc->mem = devm_kcalloc(kproc->dev, num_mems,
+ sizeof(*kproc->mem), GFP_KERNEL);
+ if (!kproc->mem)
+ return -ENOMEM;
+
+ for (i = 0; i < num_mems; i++) {
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ data->mems[i].name);
+ if (!res) {
+ dev_err(dev, "found no memory resource for %s\n",
+ data->mems[i].name);
+ return -EINVAL;
+ }
+ if (!devm_request_mem_region(dev, res->start,
+ resource_size(res),
+ dev_name(dev))) {
+ dev_err(dev, "could not request %s region for resource\n",
+ data->mems[i].name);
+ return -EBUSY;
+ }
+
+ kproc->mem[i].cpu_addr = devm_ioremap_wc(dev, res->start,
+ resource_size(res));
+ if (!kproc->mem[i].cpu_addr) {
+ dev_err(dev, "failed to map %s memory\n",
+ data->mems[i].name);
+ return -ENOMEM;
+ }
+ kproc->mem[i].bus_addr = res->start;
+ kproc->mem[i].dev_addr = data->mems[i].dev_addr;
+ kproc->mem[i].size = resource_size(res);
+
+ dev_dbg(dev, "memory %8s: bus addr %pa size 0x%zx va %pK da 0x%x\n",
+ data->mems[i].name, &kproc->mem[i].bus_addr,
+ kproc->mem[i].size, kproc->mem[i].cpu_addr,
+ kproc->mem[i].dev_addr);
+ }
+ kproc->num_mems = num_mems;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(k3_rproc_of_get_memories);
+
+int k3_rproc_of_get_sram_memories(struct platform_device *pdev,
+ struct k3_rproc *kproc)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct device *dev = &pdev->dev;
+ struct device_node *sram_np;
+ struct resource res;
+ int num_sram;
+ int i, ret;
+
+ num_sram = of_property_count_elems_of_size(np, "sram", sizeof(phandle));
+ if (num_sram <= 0) {
+ dev_dbg(dev, "device does not use reserved on-chip memories, num_sram = %d\n",
+ num_sram);
+ return 0;
+ }
+
+ kproc->sram = devm_kcalloc(dev, num_sram, sizeof(*kproc->sram), GFP_KERNEL);
+ if (!kproc->sram)
+ return -ENOMEM;
+
+ for (i = 0; i < num_sram; i++) {
+ sram_np = of_parse_phandle(np, "sram", i);
+ if (!sram_np)
+ return -EINVAL;
+
+ if (!of_device_is_available(sram_np)) {
+ of_node_put(sram_np);
+ return -EINVAL;
+ }
+
+ ret = of_address_to_resource(sram_np, 0, &res);
+ of_node_put(sram_np);
+ if (ret)
+ return -EINVAL;
+
+ kproc->sram[i].bus_addr = res.start;
+ kproc->sram[i].dev_addr = res.start;
+ kproc->sram[i].size = resource_size(&res);
+ kproc->sram[i].cpu_addr = devm_ioremap_wc(dev, res.start,
+ resource_size(&res));
+ if (!kproc->sram[i].cpu_addr) {
+ dev_err(dev, "failed to parse and map sram%d memory at %pad\n",
+ i, &res.start);
+ return -ENOMEM;
+ }
+
+ dev_dbg(dev, "memory sram%d: bus addr %pa size 0x%zx va %pK da 0x%x\n",
+ i, &kproc->sram[i].bus_addr,
+ kproc->sram[i].size, kproc->sram[i].cpu_addr,
+ kproc->sram[i].dev_addr);
+ }
+ kproc->num_sram = num_sram;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(k3_rproc_of_get_sram_memories);
+int k3_reserved_mem_init(struct k3_rproc *kproc)
+{
+ struct device *dev = kproc->dev;
+ struct device_node *np = dev->of_node;
+ struct device_node *rmem_np;
+ struct reserved_mem *rmem;
+ int num_rmems;
+ int ret, i;
+
+ num_rmems = of_property_count_elems_of_size(np, "memory-region",
+ sizeof(phandle));
+ if (num_rmems <= 0) {
+ dev_err(dev, "device does not reserved memory regions, ret = %d\n",
+ num_rmems);
+ return -EINVAL;
+ }
+ if (num_rmems < 2) {
+ dev_err(dev, "device needs at least two memory regions to be defined, num = %d\n",
+ num_rmems);
+ return -EINVAL;
+ }
+
+ /* use reserved memory region 0 for vring DMA allocations */
+ ret = of_reserved_mem_device_init_by_idx(dev, np, 0);
+ if (ret) {
+ dev_err(dev, "device cannot initialize DMA pool, ret = %d\n",
+ ret);
+ return ret;
+ }
+
+ num_rmems--;
+ kproc->rmem = kcalloc(num_rmems, sizeof(*kproc->rmem), GFP_KERNEL);
+ if (!kproc->rmem) {
+ ret = -ENOMEM;
+ goto release_rmem;
+ }
+
+ /* use remaining reserved memory regions for static carveouts */
+ for (i = 0; i < num_rmems; i++) {
+ rmem_np = of_parse_phandle(np, "memory-region", i + 1);
+ if (!rmem_np) {
+ ret = -EINVAL;
+ goto unmap_rmem;
+ }
+
+ rmem = of_reserved_mem_lookup(rmem_np);
+ if (!rmem) {
+ of_node_put(rmem_np);
+ ret = -EINVAL;
+ goto unmap_rmem;
+ }
+ of_node_put(rmem_np);
+
+ kproc->rmem[i].bus_addr = rmem->base;
+ /* 64-bit address regions currently not supported */
+ kproc->rmem[i].dev_addr = (u32)rmem->base;
+ kproc->rmem[i].size = rmem->size;
+ kproc->rmem[i].cpu_addr = ioremap_wc(rmem->base, rmem->size);
+ if (!kproc->rmem[i].cpu_addr) {
+ dev_err(dev, "failed to map reserved memory#%d at %pa of size %pa\n",
+ i + 1, &rmem->base, &rmem->size);
+ ret = -ENOMEM;
+ goto unmap_rmem;
+ }
+
+ dev_dbg(dev, "reserved memory%d: bus addr %pa size 0x%zx va %pK da 0x%x\n",
+ i + 1, &kproc->rmem[i].bus_addr,
+ kproc->rmem[i].size, kproc->rmem[i].cpu_addr,
+ kproc->rmem[i].dev_addr);
+ }
+ kproc->num_rmems = num_rmems;
+
+ return 0;
+
+unmap_rmem:
+ for (i--; i >= 0; i--)
+ iounmap(kproc->rmem[i].cpu_addr);
+ kfree(kproc->rmem);
+release_rmem:
+ of_reserved_mem_device_release(kproc->dev);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(k3_reserved_mem_init);
+
+void k3_reserved_mem_exit(struct k3_rproc *kproc)
+{
+ int i;
+
+ for (i = 0; i < kproc->num_rmems; i++)
+ iounmap(kproc->rmem[i].cpu_addr);
+ kfree(kproc->rmem);
+
+ of_reserved_mem_device_release(kproc->dev);
+}
+EXPORT_SYMBOL_GPL(k3_reserved_mem_exit);
+
+struct ti_sci_proc *k3_rproc_of_get_tsp(struct device *dev,
+ const struct ti_sci_handle *sci)
+{
+ struct ti_sci_proc *tsp;
+ u32 temp[2];
+ int ret;
+
+ ret = of_property_read_u32_array(dev->of_node, "ti,sci-proc-ids",
+ temp, 2);
+ if (ret < 0)
+ return ERR_PTR(ret);
+
+ tsp = kzalloc(sizeof(*tsp), GFP_KERNEL);
+ if (!tsp)
+ return ERR_PTR(-ENOMEM);
+
+ tsp->dev = dev;
+ tsp->sci = sci;
+ tsp->ops = &sci->ops.proc_ops;
+ tsp->proc_id = temp[0];
+ tsp->host_id = temp[1];
+
+ return tsp;
+}
+EXPORT_SYMBOL_GPL(k3_rproc_of_get_tsp);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("TI K3 common Remoteproc support");
diff --git a/drivers/remoteproc/ti_k3_dsp_remoteproc.c b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
dissimilarity index 67%
index ab882e3b7130..ebe23fc5ca44 100644
--- a/drivers/remoteproc/ti_k3_dsp_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
@@ -1,909 +1,368 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * TI K3 DSP Remote Processor(s) driver
- *
- * Copyright (C) 2018-2022 Texas Instruments Incorporated - https://www.ti.com/
- * Suman Anna <s-anna@xxxxxx>
- */
-
-#include <linux/io.h>
-#include <linux/mailbox_client.h>
-#include <linux/module.h>
-#include <linux/of.h>
-#include <linux/of_reserved_mem.h>
-#include <linux/omap-mailbox.h>
-#include <linux/platform_device.h>
-#include <linux/remoteproc.h>
-#include <linux/reset.h>
-#include <linux/slab.h>
-
-#include "omap_remoteproc.h"
-#include "remoteproc_internal.h"
-#include "ti_sci_proc.h"
-
-#define KEYSTONE_RPROC_LOCAL_ADDRESS_MASK (SZ_16M - 1)
-
-/**
- * struct k3_dsp_mem - internal memory structure
- * @cpu_addr: MPU virtual address of the memory region
- * @bus_addr: Bus address used to access the memory region
- * @dev_addr: Device address of the memory region from DSP view
- * @size: Size of the memory region
- */
-struct k3_dsp_mem {
- void __iomem *cpu_addr;
- phys_addr_t bus_addr;
- u32 dev_addr;
- size_t size;
-};
-
-/**
- * struct k3_dsp_mem_data - memory definitions for a DSP
- * @name: name for this memory entry
- * @dev_addr: device address for the memory entry
- */
-struct k3_dsp_mem_data {
- const char *name;
- const u32 dev_addr;
-};
-
-/**
- * struct k3_dsp_dev_data - device data structure for a DSP
- * @mems: pointer to memory definitions for a DSP
- * @num_mems: number of memory regions in @mems
- * @boot_align_addr: boot vector address alignment granularity
- * @uses_lreset: flag to denote the need for local reset management
- */
-struct k3_dsp_dev_data {
- const struct k3_dsp_mem_data *mems;
- u32 num_mems;
- u32 boot_align_addr;
- bool uses_lreset;
-};
-
-/**
- * struct k3_dsp_rproc - k3 DSP remote processor driver structure
- * @dev: cached device pointer
- * @rproc: remoteproc device handle
- * @mem: internal memory regions data
- * @num_mems: number of internal memory regions
- * @rmem: reserved memory regions data
- * @num_rmems: number of reserved memory regions
- * @reset: reset control handle
- * @data: pointer to DSP-specific device data
- * @tsp: TI-SCI processor control handle
- * @ti_sci: TI-SCI handle
- * @ti_sci_id: TI-SCI device identifier
- * @mbox: mailbox channel handle
- * @client: mailbox client to request the mailbox channel
- */
-struct k3_dsp_rproc {
- struct device *dev;
- struct rproc *rproc;
- struct k3_dsp_mem *mem;
- int num_mems;
- struct k3_dsp_mem *rmem;
- int num_rmems;
- struct reset_control *reset;
- const struct k3_dsp_dev_data *data;
- struct ti_sci_proc *tsp;
- const struct ti_sci_handle *ti_sci;
- u32 ti_sci_id;
- struct mbox_chan *mbox;
- struct mbox_client client;
-};
-
-/**
- * k3_dsp_rproc_mbox_callback() - inbound mailbox message handler
- * @client: mailbox client pointer used for requesting the mailbox channel
- * @data: mailbox payload
- *
- * This handler is invoked by the OMAP mailbox driver whenever a mailbox
- * message is received. Usually, the mailbox payload simply contains
- * the index of the virtqueue that is kicked by the remote processor,
- * and we let remoteproc core handle it.
- *
- * In addition to virtqueue indices, we also have some out-of-band values
- * that indicate different events. Those values are deliberately very
- * large so they don't coincide with virtqueue indices.
- */
-static void k3_dsp_rproc_mbox_callback(struct mbox_client *client, void *data)
-{
- struct k3_dsp_rproc *kproc = container_of(client, struct k3_dsp_rproc,
- client);
- struct device *dev = kproc->rproc->dev.parent;
- const char *name = kproc->rproc->name;
- u32 msg = omap_mbox_message(data);
-
- dev_dbg(dev, "mbox msg: 0x%x\n", msg);
-
- switch (msg) {
- case RP_MBOX_CRASH:
- /*
- * remoteproc detected an exception, but error recovery is not
- * supported. So, just log this for now
- */
- dev_err(dev, "K3 DSP rproc %s crashed\n", name);
- break;
- case RP_MBOX_ECHO_REPLY:
- dev_info(dev, "received echo reply from %s\n", name);
- break;
- default:
- /* silently handle all other valid messages */
- if (msg >= RP_MBOX_READY && msg < RP_MBOX_END_MSG)
- return;
- if (msg > kproc->rproc->max_notifyid) {
- dev_dbg(dev, "dropping unknown message 0x%x", msg);
- return;
- }
- /* msg contains the index of the triggered vring */
- if (rproc_vq_interrupt(kproc->rproc, msg) == IRQ_NONE)
- dev_dbg(dev, "no message was found in vqid %d\n", msg);
- }
-}
-
-/*
- * Kick the remote processor to notify about pending unprocessed messages.
- * The vqid usage is not used and is inconsequential, as the kick is performed
- * through a simulated GPIO (a bit in an IPC interrupt-triggering register),
- * the remote processor is expected to process both its Tx and Rx virtqueues.
- */
-static void k3_dsp_rproc_kick(struct rproc *rproc, int vqid)
-{
- struct k3_dsp_rproc *kproc = rproc->priv;
- struct device *dev = rproc->dev.parent;
- mbox_msg_t msg = (mbox_msg_t)vqid;
- int ret;
-
- /* send the index of the triggered virtqueue in the mailbox payload */
- ret = mbox_send_message(kproc->mbox, (void *)msg);
- if (ret < 0)
- dev_err(dev, "failed to send mailbox message (%pe)\n",
- ERR_PTR(ret));
-}
-
-/* Put the DSP processor into reset */
-static int k3_dsp_rproc_reset(struct k3_dsp_rproc *kproc)
-{
- struct device *dev = kproc->dev;
- int ret;
-
- ret = reset_control_assert(kproc->reset);
- if (ret) {
- dev_err(dev, "local-reset assert failed (%pe)\n", ERR_PTR(ret));
- return ret;
- }
-
- if (kproc->data->uses_lreset)
- return ret;
-
- ret = kproc->ti_sci->ops.dev_ops.put_device(kproc->ti_sci,
- kproc->ti_sci_id);
- if (ret) {
- dev_err(dev, "module-reset assert failed (%pe)\n", ERR_PTR(ret));
- if (reset_control_deassert(kproc->reset))
- dev_warn(dev, "local-reset deassert back failed\n");
- }
-
- return ret;
-}
-
-/* Release the DSP processor from reset */
-static int k3_dsp_rproc_release(struct k3_dsp_rproc *kproc)
-{
- struct device *dev = kproc->dev;
- int ret;
-
- if (kproc->data->uses_lreset)
- goto lreset;
-
- ret = kproc->ti_sci->ops.dev_ops.get_device(kproc->ti_sci,
- kproc->ti_sci_id);
- if (ret) {
- dev_err(dev, "module-reset deassert failed (%pe)\n", ERR_PTR(ret));
- return ret;
- }
-
-lreset:
- ret = reset_control_deassert(kproc->reset);
- if (ret) {
- dev_err(dev, "local-reset deassert failed, (%pe)\n", ERR_PTR(ret));
- if (kproc->ti_sci->ops.dev_ops.put_device(kproc->ti_sci,
- kproc->ti_sci_id))
- dev_warn(dev, "module-reset assert back failed\n");
- }
-
- return ret;
-}
-
-static int k3_dsp_rproc_request_mbox(struct rproc *rproc)
-{
- struct k3_dsp_rproc *kproc = rproc->priv;
- struct mbox_client *client = &kproc->client;
- struct device *dev = kproc->dev;
- int ret;
-
- client->dev = dev;
- client->tx_done = NULL;
- client->rx_callback = k3_dsp_rproc_mbox_callback;
- client->tx_block = false;
- client->knows_txdone = false;
-
- kproc->mbox = mbox_request_channel(client, 0);
- if (IS_ERR(kproc->mbox)) {
- ret = -EBUSY;
- dev_err(dev, "mbox_request_channel failed: %ld\n",
- PTR_ERR(kproc->mbox));
- return ret;
- }
-
- /*
- * Ping the remote processor, this is only for sanity-sake for now;
- * there is no functional effect whatsoever.
- *
- * Note that the reply will _not_ arrive immediately: this message
- * will wait in the mailbox fifo until the remote processor is booted.
- */
- ret = mbox_send_message(kproc->mbox, (void *)RP_MBOX_ECHO_REQUEST);
- if (ret < 0) {
- dev_err(dev, "mbox_send_message failed (%pe)\n", ERR_PTR(ret));
- mbox_free_channel(kproc->mbox);
- return ret;
- }
-
- return 0;
-}
-/*
- * The C66x DSP cores have a local reset that affects only the CPU, and a
- * generic module reset that powers on the device and allows the DSP internal
- * memories to be accessed while the local reset is asserted. This function is
- * used to release the global reset on C66x DSPs to allow loading into the DSP
- * internal RAMs. The .prepare() ops is invoked by remoteproc core before any
- * firmware loading, and is followed by the .start() ops after loading to
- * actually let the C66x DSP cores run. This callback is invoked only in
- * remoteproc mode.
- */
-static int k3_dsp_rproc_prepare(struct rproc *rproc)
-{
- struct k3_dsp_rproc *kproc = rproc->priv;
- struct device *dev = kproc->dev;
- int ret;
-
- ret = kproc->ti_sci->ops.dev_ops.get_device(kproc->ti_sci,
- kproc->ti_sci_id);
- if (ret)
- dev_err(dev, "module-reset deassert failed, cannot enable internal RAM loading (%pe)\n",
- ERR_PTR(ret));
-
- return ret;
-}
-
-/*
- * This function implements the .unprepare() ops and performs the complimentary
- * operations to that of the .prepare() ops. The function is used to assert the
- * global reset on applicable C66x cores. This completes the second portion of
- * powering down the C66x DSP cores. The cores themselves are only halted in the
- * .stop() callback through the local reset, and the .unprepare() ops is invoked
- * by the remoteproc core after the remoteproc is stopped to balance the global
- * reset. This callback is invoked only in remoteproc mode.
- */
-static int k3_dsp_rproc_unprepare(struct rproc *rproc)
-{
- struct k3_dsp_rproc *kproc = rproc->priv;
- struct device *dev = kproc->dev;
- int ret;
-
- ret = kproc->ti_sci->ops.dev_ops.put_device(kproc->ti_sci,
- kproc->ti_sci_id);
- if (ret)
- dev_err(dev, "module-reset assert failed (%pe)\n", ERR_PTR(ret));
-
- return ret;
-}
-
-/*
- * Power up the DSP remote processor.
- *
- * This function will be invoked only after the firmware for this rproc
- * was loaded, parsed successfully, and all of its resource requirements
- * were met. This callback is invoked only in remoteproc mode.
- */
-static int k3_dsp_rproc_start(struct rproc *rproc)
-{
- struct k3_dsp_rproc *kproc = rproc->priv;
- struct device *dev = kproc->dev;
- u32 boot_addr;
- int ret;
-
- ret = k3_dsp_rproc_request_mbox(rproc);
- if (ret)
- return ret;
-
- boot_addr = rproc->bootaddr;
- if (boot_addr & (kproc->data->boot_align_addr - 1)) {
- dev_err(dev, "invalid boot address 0x%x, must be aligned on a 0x%x boundary\n",
- boot_addr, kproc->data->boot_align_addr);
- ret = -EINVAL;
- goto put_mbox;
- }
-
- dev_err(dev, "booting DSP core using boot addr = 0x%x\n", boot_addr);
- ret = ti_sci_proc_set_config(kproc->tsp, boot_addr, 0, 0);
- if (ret)
- goto put_mbox;
-
- ret = k3_dsp_rproc_release(kproc);
- if (ret)
- goto put_mbox;
-
- return 0;
-
-put_mbox:
- mbox_free_channel(kproc->mbox);
- return ret;
-}
-
-/*
- * Stop the DSP remote processor.
- *
- * This function puts the DSP processor into reset, and finishes processing
- * of any pending messages. This callback is invoked only in remoteproc mode.
- */
-static int k3_dsp_rproc_stop(struct rproc *rproc)
-{
- struct k3_dsp_rproc *kproc = rproc->priv;
-
- mbox_free_channel(kproc->mbox);
-
- k3_dsp_rproc_reset(kproc);
-
- return 0;
-}
-
-/*
- * Attach to a running DSP remote processor (IPC-only mode)
- *
- * This rproc attach callback only needs to request the mailbox, the remote
- * processor is already booted, so there is no need to issue any TI-SCI
- * commands to boot the DSP core. This callback is invoked only in IPC-only
- * mode.
- */
-static int k3_dsp_rproc_attach(struct rproc *rproc)
-{
- struct k3_dsp_rproc *kproc = rproc->priv;
- struct device *dev = kproc->dev;
- int ret;
-
- ret = k3_dsp_rproc_request_mbox(rproc);
- if (ret)
- return ret;
-
- dev_info(dev, "DSP initialized in IPC-only mode\n");
- return 0;
-}
-
-/*
- * Detach from a running DSP remote processor (IPC-only mode)
- *
- * This rproc detach callback performs the opposite operation to attach callback
- * and only needs to release the mailbox, the DSP core is not stopped and will
- * be left to continue to run its booted firmware. This callback is invoked only
- * in IPC-only mode.
- */
-static int k3_dsp_rproc_detach(struct rproc *rproc)
-{
- struct k3_dsp_rproc *kproc = rproc->priv;
- struct device *dev = kproc->dev;
-
- mbox_free_channel(kproc->mbox);
- dev_info(dev, "DSP deinitialized in IPC-only mode\n");
- return 0;
-}
-
-/*
- * This function implements the .get_loaded_rsc_table() callback and is used
- * to provide the resource table for a booted DSP in IPC-only mode. The K3 DSP
- * firmwares follow a design-by-contract approach and are expected to have the
- * resource table at the base of the DDR region reserved for firmware usage.
- * This provides flexibility for the remote processor to be booted by different
- * bootloaders that may or may not have the ability to publish the resource table
- * address and size through a DT property. This callback is invoked only in
- * IPC-only mode.
- */
-static struct resource_table *k3_dsp_get_loaded_rsc_table(struct rproc *rproc,
- size_t *rsc_table_sz)
-{
- struct k3_dsp_rproc *kproc = rproc->priv;
- struct device *dev = kproc->dev;
-
- if (!kproc->rmem[0].cpu_addr) {
- dev_err(dev, "memory-region #1 does not exist, loaded rsc table can't be found");
- return ERR_PTR(-ENOMEM);
- }
-
- /*
- * NOTE: The resource table size is currently hard-coded to a maximum
- * of 256 bytes. The most common resource table usage for K3 firmwares
- * is to only have the vdev resource entry and an optional trace entry.
- * The exact size could be computed based on resource table address, but
- * the hard-coded value suffices to support the IPC-only mode.
- */
- *rsc_table_sz = 256;
- return (struct resource_table *)kproc->rmem[0].cpu_addr;
-}
-
-/*
- * Custom function to translate a DSP device address (internal RAMs only) to a
- * kernel virtual address. The DSPs can access their RAMs at either an internal
- * address visible only from a DSP, or at the SoC-level bus address. Both these
- * addresses need to be looked through for translation. The translated addresses
- * can be used either by the remoteproc core for loading (when using kernel
- * remoteproc loader), or by any rpmsg bus drivers.
- */
-static void *k3_dsp_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
-{
- struct k3_dsp_rproc *kproc = rproc->priv;
- void __iomem *va = NULL;
- phys_addr_t bus_addr;
- u32 dev_addr, offset;
- size_t size;
- int i;
-
- if (len == 0)
- return NULL;
-
- for (i = 0; i < kproc->num_mems; i++) {
- bus_addr = kproc->mem[i].bus_addr;
- dev_addr = kproc->mem[i].dev_addr;
- size = kproc->mem[i].size;
-
- if (da < KEYSTONE_RPROC_LOCAL_ADDRESS_MASK) {
- /* handle DSP-view addresses */
- if (da >= dev_addr &&
- ((da + len) <= (dev_addr + size))) {
- offset = da - dev_addr;
- va = kproc->mem[i].cpu_addr + offset;
- return (__force void *)va;
- }
- } else {
- /* handle SoC-view addresses */
- if (da >= bus_addr &&
- (da + len) <= (bus_addr + size)) {
- offset = da - bus_addr;
- va = kproc->mem[i].cpu_addr + offset;
- return (__force void *)va;
- }
- }
- }
-
- /* handle static DDR reserved memory regions */
- for (i = 0; i < kproc->num_rmems; i++) {
- dev_addr = kproc->rmem[i].dev_addr;
- size = kproc->rmem[i].size;
-
- if (da >= dev_addr && ((da + len) <= (dev_addr + size))) {
- offset = da - dev_addr;
- va = kproc->rmem[i].cpu_addr + offset;
- return (__force void *)va;
- }
- }
-
- return NULL;
-}
-
-static const struct rproc_ops k3_dsp_rproc_ops = {
- .start = k3_dsp_rproc_start,
- .stop = k3_dsp_rproc_stop,
- .kick = k3_dsp_rproc_kick,
- .da_to_va = k3_dsp_rproc_da_to_va,
-};
-
-static int k3_dsp_rproc_of_get_memories(struct platform_device *pdev,
- struct k3_dsp_rproc *kproc)
-{
- const struct k3_dsp_dev_data *data = kproc->data;
- struct device *dev = &pdev->dev;
- struct resource *res;
- int num_mems = 0;
- int i;
-
- num_mems = kproc->data->num_mems;
- kproc->mem = devm_kcalloc(kproc->dev, num_mems,
- sizeof(*kproc->mem), GFP_KERNEL);
- if (!kproc->mem)
- return -ENOMEM;
-
- for (i = 0; i < num_mems; i++) {
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
- data->mems[i].name);
- if (!res) {
- dev_err(dev, "found no memory resource for %s\n",
- data->mems[i].name);
- return -EINVAL;
- }
- if (!devm_request_mem_region(dev, res->start,
- resource_size(res),
- dev_name(dev))) {
- dev_err(dev, "could not request %s region for resource\n",
- data->mems[i].name);
- return -EBUSY;
- }
-
- kproc->mem[i].cpu_addr = devm_ioremap_wc(dev, res->start,
- resource_size(res));
- if (!kproc->mem[i].cpu_addr) {
- dev_err(dev, "failed to map %s memory\n",
- data->mems[i].name);
- return -ENOMEM;
- }
- kproc->mem[i].bus_addr = res->start;
- kproc->mem[i].dev_addr = data->mems[i].dev_addr;
- kproc->mem[i].size = resource_size(res);
-
- dev_dbg(dev, "memory %8s: bus addr %pa size 0x%zx va %pK da 0x%x\n",
- data->mems[i].name, &kproc->mem[i].bus_addr,
- kproc->mem[i].size, kproc->mem[i].cpu_addr,
- kproc->mem[i].dev_addr);
- }
- kproc->num_mems = num_mems;
-
- return 0;
-}
-
-static int k3_dsp_reserved_mem_init(struct k3_dsp_rproc *kproc)
-{
- struct device *dev = kproc->dev;
- struct device_node *np = dev->of_node;
- struct device_node *rmem_np;
- struct reserved_mem *rmem;
- int num_rmems;
- int ret, i;
-
- num_rmems = of_property_count_elems_of_size(np, "memory-region",
- sizeof(phandle));
- if (num_rmems < 0) {
- dev_err(dev, "device does not reserved memory regions (%pe)\n",
- ERR_PTR(num_rmems));
- return -EINVAL;
- }
- if (num_rmems < 2) {
- dev_err(dev, "device needs at least two memory regions to be defined, num = %d\n",
- num_rmems);
- return -EINVAL;
- }
-
- /* use reserved memory region 0 for vring DMA allocations */
- ret = of_reserved_mem_device_init_by_idx(dev, np, 0);
- if (ret) {
- dev_err(dev, "device cannot initialize DMA pool (%pe)\n",
- ERR_PTR(ret));
- return ret;
- }
-
- num_rmems--;
- kproc->rmem = kcalloc(num_rmems, sizeof(*kproc->rmem), GFP_KERNEL);
- if (!kproc->rmem) {
- ret = -ENOMEM;
- goto release_rmem;
- }
-
- /* use remaining reserved memory regions for static carveouts */
- for (i = 0; i < num_rmems; i++) {
- rmem_np = of_parse_phandle(np, "memory-region", i + 1);
- if (!rmem_np) {
- ret = -EINVAL;
- goto unmap_rmem;
- }
-
- rmem = of_reserved_mem_lookup(rmem_np);
- if (!rmem) {
- of_node_put(rmem_np);
- ret = -EINVAL;
- goto unmap_rmem;
- }
- of_node_put(rmem_np);
-
- kproc->rmem[i].bus_addr = rmem->base;
- /* 64-bit address regions currently not supported */
- kproc->rmem[i].dev_addr = (u32)rmem->base;
- kproc->rmem[i].size = rmem->size;
- kproc->rmem[i].cpu_addr = ioremap_wc(rmem->base, rmem->size);
- if (!kproc->rmem[i].cpu_addr) {
- dev_err(dev, "failed to map reserved memory#%d at %pa of size %pa\n",
- i + 1, &rmem->base, &rmem->size);
- ret = -ENOMEM;
- goto unmap_rmem;
- }
-
- dev_dbg(dev, "reserved memory%d: bus addr %pa size 0x%zx va %pK da 0x%x\n",
- i + 1, &kproc->rmem[i].bus_addr,
- kproc->rmem[i].size, kproc->rmem[i].cpu_addr,
- kproc->rmem[i].dev_addr);
- }
- kproc->num_rmems = num_rmems;
-
- return 0;
-
-unmap_rmem:
- for (i--; i >= 0; i--)
- iounmap(kproc->rmem[i].cpu_addr);
- kfree(kproc->rmem);
-release_rmem:
- of_reserved_mem_device_release(kproc->dev);
- return ret;
-}
-
-static void k3_dsp_reserved_mem_exit(struct k3_dsp_rproc *kproc)
-{
- int i;
-
- for (i = 0; i < kproc->num_rmems; i++)
- iounmap(kproc->rmem[i].cpu_addr);
- kfree(kproc->rmem);
-
- of_reserved_mem_device_release(kproc->dev);
-}
-
-static
-struct ti_sci_proc *k3_dsp_rproc_of_get_tsp(struct device *dev,
- const struct ti_sci_handle *sci)
-{
- struct ti_sci_proc *tsp;
- u32 temp[2];
- int ret;
-
- ret = of_property_read_u32_array(dev->of_node, "ti,sci-proc-ids",
- temp, 2);
- if (ret < 0)
- return ERR_PTR(ret);
-
- tsp = kzalloc(sizeof(*tsp), GFP_KERNEL);
- if (!tsp)
- return ERR_PTR(-ENOMEM);
-
- tsp->dev = dev;
- tsp->sci = sci;
- tsp->ops = &sci->ops.proc_ops;
- tsp->proc_id = temp[0];
- tsp->host_id = temp[1];
-
- return tsp;
-}
-
-static int k3_dsp_rproc_probe(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- struct device_node *np = dev->of_node;
- const struct k3_dsp_dev_data *data;
- struct k3_dsp_rproc *kproc;
- struct rproc *rproc;
- const char *fw_name;
- bool p_state = false;
- int ret = 0;
- int ret1;
-
- data = of_device_get_match_data(dev);
- if (!data)
- return -ENODEV;
-
- ret = rproc_of_parse_firmware(dev, 0, &fw_name);
- if (ret)
- return dev_err_probe(dev, ret, "failed to parse firmware-name property\n");
-
- rproc = rproc_alloc(dev, dev_name(dev), &k3_dsp_rproc_ops, fw_name,
- sizeof(*kproc));
- if (!rproc)
- return -ENOMEM;
-
- rproc->has_iommu = false;
- rproc->recovery_disabled = true;
- if (data->uses_lreset) {
- rproc->ops->prepare = k3_dsp_rproc_prepare;
- rproc->ops->unprepare = k3_dsp_rproc_unprepare;
- }
- kproc = rproc->priv;
- kproc->rproc = rproc;
- kproc->dev = dev;
- kproc->data = data;
-
- kproc->ti_sci = ti_sci_get_by_phandle(np, "ti,sci");
- if (IS_ERR(kproc->ti_sci)) {
- ret = dev_err_probe(dev, PTR_ERR(kproc->ti_sci),
- "failed to get ti-sci handle\n");
- kproc->ti_sci = NULL;
- goto free_rproc;
- }
-
- ret = of_property_read_u32(np, "ti,sci-dev-id", &kproc->ti_sci_id);
- if (ret) {
- dev_err_probe(dev, ret, "missing 'ti,sci-dev-id' property\n");
- goto put_sci;
- }
-
- kproc->reset = devm_reset_control_get_exclusive(dev, NULL);
- if (IS_ERR(kproc->reset)) {
- ret = dev_err_probe(dev, PTR_ERR(kproc->reset),
- "failed to get reset\n");
- goto put_sci;
- }
-
- kproc->tsp = k3_dsp_rproc_of_get_tsp(dev, kproc->ti_sci);
- if (IS_ERR(kproc->tsp)) {
- ret = dev_err_probe(dev, PTR_ERR(kproc->tsp),
- "failed to construct ti-sci proc control\n");
- goto put_sci;
- }
-
- ret = ti_sci_proc_request(kproc->tsp);
- if (ret < 0) {
- dev_err_probe(dev, ret, "ti_sci_proc_request failed\n");
- goto free_tsp;
- }
-
- ret = k3_dsp_rproc_of_get_memories(pdev, kproc);
- if (ret)
- goto release_tsp;
-
- ret = k3_dsp_reserved_mem_init(kproc);
- if (ret) {
- dev_err_probe(dev, ret, "reserved memory init failed\n");
- goto release_tsp;
- }
-
- ret = kproc->ti_sci->ops.dev_ops.is_on(kproc->ti_sci, kproc->ti_sci_id,
- NULL, &p_state);
- if (ret) {
- dev_err_probe(dev, ret, "failed to get initial state, mode cannot be determined\n");
- goto release_mem;
- }
-
- /* configure J721E devices for either remoteproc or IPC-only mode */
- if (p_state) {
- dev_info(dev, "configured DSP for IPC-only mode\n");
- rproc->state = RPROC_DETACHED;
- /* override rproc ops with only required IPC-only mode ops */
- rproc->ops->prepare = NULL;
- rproc->ops->unprepare = NULL;
- rproc->ops->start = NULL;
- rproc->ops->stop = NULL;
- rproc->ops->attach = k3_dsp_rproc_attach;
- rproc->ops->detach = k3_dsp_rproc_detach;
- rproc->ops->get_loaded_rsc_table = k3_dsp_get_loaded_rsc_table;
- } else {
- dev_info(dev, "configured DSP for remoteproc mode\n");
- /*
- * ensure the DSP local reset is asserted to ensure the DSP
- * doesn't execute bogus code in .prepare() when the module
- * reset is released.
- */
- if (data->uses_lreset) {
- ret = reset_control_status(kproc->reset);
- if (ret < 0) {
- dev_err_probe(dev, ret, "failed to get reset status\n");
- goto release_mem;
- } else if (ret == 0) {
- dev_warn(dev, "local reset is deasserted for device\n");
- k3_dsp_rproc_reset(kproc);
- }
- }
- }
-
- ret = rproc_add(rproc);
- if (ret) {
- dev_err_probe(dev, ret, "failed to add register device with remoteproc core\n");
- goto release_mem;
- }
-
- platform_set_drvdata(pdev, kproc);
-
- return 0;
-
-release_mem:
- k3_dsp_reserved_mem_exit(kproc);
-release_tsp:
- ret1 = ti_sci_proc_release(kproc->tsp);
- if (ret1)
- dev_err(dev, "failed to release proc (%pe)\n", ERR_PTR(ret1));
-free_tsp:
- kfree(kproc->tsp);
-put_sci:
- ret1 = ti_sci_put_handle(kproc->ti_sci);
- if (ret1)
- dev_err(dev, "failed to put ti_sci handle (%pe)\n", ERR_PTR(ret1));
-free_rproc:
- rproc_free(rproc);
- return ret;
-}
-
-static void k3_dsp_rproc_remove(struct platform_device *pdev)
-{
- struct k3_dsp_rproc *kproc = platform_get_drvdata(pdev);
- struct rproc *rproc = kproc->rproc;
- struct device *dev = &pdev->dev;
- int ret;
-
- if (rproc->state == RPROC_ATTACHED) {
- ret = rproc_detach(rproc);
- if (ret) {
- /* Note this error path leaks resources */
- dev_err(dev, "failed to detach proc (%pe)\n", ERR_PTR(ret));
- return;
- }
- }
-
- rproc_del(kproc->rproc);
-
- ret = ti_sci_proc_release(kproc->tsp);
- if (ret)
- dev_err(dev, "failed to release proc (%pe)\n", ERR_PTR(ret));
-
- kfree(kproc->tsp);
-
- ret = ti_sci_put_handle(kproc->ti_sci);
- if (ret)
- dev_err(dev, "failed to put ti_sci handle (%pe)\n", ERR_PTR(ret));
-
- k3_dsp_reserved_mem_exit(kproc);
- rproc_free(kproc->rproc);
-}
-
-static const struct k3_dsp_mem_data c66_mems[] = {
- { .name = "l2sram", .dev_addr = 0x800000 },
- { .name = "l1pram", .dev_addr = 0xe00000 },
- { .name = "l1dram", .dev_addr = 0xf00000 },
-};
-
-/* C71x cores only have a L1P Cache, there are no L1P SRAMs */
-static const struct k3_dsp_mem_data c71_mems[] = {
- { .name = "l2sram", .dev_addr = 0x800000 },
- { .name = "l1dram", .dev_addr = 0xe00000 },
-};
-
-static const struct k3_dsp_mem_data c7xv_mems[] = {
- { .name = "l2sram", .dev_addr = 0x800000 },
-};
-
-static const struct k3_dsp_dev_data c66_data = {
- .mems = c66_mems,
- .num_mems = ARRAY_SIZE(c66_mems),
- .boot_align_addr = SZ_1K,
- .uses_lreset = true,
-};
-
-static const struct k3_dsp_dev_data c71_data = {
- .mems = c71_mems,
- .num_mems = ARRAY_SIZE(c71_mems),
- .boot_align_addr = SZ_2M,
- .uses_lreset = false,
-};
-
-static const struct k3_dsp_dev_data c7xv_data = {
- .mems = c7xv_mems,
- .num_mems = ARRAY_SIZE(c7xv_mems),
- .boot_align_addr = SZ_2M,
- .uses_lreset = false,
-};
-
-static const struct of_device_id k3_dsp_of_match[] = {
- { .compatible = "ti,j721e-c66-dsp", .data = &c66_data, },
- { .compatible = "ti,j721e-c71-dsp", .data = &c71_data, },
- { .compatible = "ti,j721s2-c71-dsp", .data = &c71_data, },
- { .compatible = "ti,am62a-c7xv-dsp", .data = &c7xv_data, },
- { /* sentinel */ },
-};
-MODULE_DEVICE_TABLE(of, k3_dsp_of_match);
-
-static struct platform_driver k3_dsp_rproc_driver = {
- .probe = k3_dsp_rproc_probe,
- .remove_new = k3_dsp_rproc_remove,
- .driver = {
- .name = "k3-dsp-rproc",
- .of_match_table = k3_dsp_of_match,
- },
-};
-
-module_platform_driver(k3_dsp_rproc_driver);
-
-MODULE_AUTHOR("Suman Anna <s-anna@xxxxxx>");
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("TI K3 DSP Remoteproc driver");
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * TI K3 DSP Remote Processor(s) driver
+ *
+ * Copyright (C) 2018-2022 Texas Instruments Incorporated - https://www.ti.com/
+ * Suman Anna <s-anna@xxxxxx>
+ */
+
+#include <linux/io.h>
+#include <linux/mailbox_client.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_reserved_mem.h>
+#include <linux/omap-mailbox.h>
+#include <linux/platform_device.h>
+#include <linux/remoteproc.h>
+#include <linux/reset.h>
+#include <linux/slab.h>
+
+#include "omap_remoteproc.h"
+#include "remoteproc_internal.h"
+#include "ti_sci_proc.h"
+#include "ti_k3_common.h"
+
+/*
+ * Power up the DSP remote processor.
+ *
+ * This function will be invoked only after the firmware for this rproc
+ * was loaded, parsed successfully, and all of its resource requirements
+ * were met. This callback is invoked only in remoteproc mode.
+ */
+static int k3_dsp_rproc_start(struct rproc *rproc)
+{
+ struct k3_rproc *kproc = rproc->priv;
+ struct device *dev = kproc->dev;
+ u32 boot_addr;
+ int ret;
+
+ ret = k3_rproc_request_mbox(rproc);
+ if (ret)
+ return ret;
+
+ boot_addr = rproc->bootaddr;
+ if (boot_addr & (kproc->data->boot_align_addr - 1)) {
+ dev_err(dev, "invalid boot address 0x%x, must be aligned on a 0x%x boundary\n",
+ boot_addr, kproc->data->boot_align_addr);
+ ret = -EINVAL;
+ goto put_mbox;
+ }
+
+ dev_err(dev, "booting DSP core using boot addr = 0x%x\n", boot_addr);
+ ret = ti_sci_proc_set_config(kproc->tsp, boot_addr, 0, 0);
+ if (ret)
+ goto put_mbox;
+
+ ret = k3_rproc_release(kproc);
+ if (ret)
+ goto put_mbox;
+
+ return 0;
+
+put_mbox:
+ mbox_free_channel(kproc->mbox);
+ return ret;
+}
+
+/*
+ * Stop the DSP remote processor.
+ *
+ * This function puts the DSP processor into reset, and finishes processing
+ * of any pending messages. This callback is invoked only in remoteproc mode.
+ */
+static int k3_dsp_rproc_stop(struct rproc *rproc)
+{
+ struct k3_rproc *kproc = rproc->priv;
+
+ mbox_free_channel(kproc->mbox);
+
+ k3_rproc_reset(kproc);
+
+ return 0;
+}
+
+/*
+ * Attach to a running DSP remote processor (IPC-only mode)
+ *
+ * This rproc attach callback only needs to request the mailbox, the remote
+ * processor is already booted, so there is no need to issue any TI-SCI
+ * commands to boot the DSP core. This callback is invoked only in IPC-only
+ * mode.
+ */
+static int k3_dsp_rproc_attach(struct rproc *rproc)
+{
+ struct k3_rproc *kproc = rproc->priv;
+ struct device *dev = kproc->dev;
+ int ret;
+
+ ret = k3_rproc_request_mbox(rproc);
+ if (ret)
+ return ret;
+
+ dev_info(dev, "DSP initialized in IPC-only mode\n");
+ return 0;
+}
+
+/*
+ * Detach from a running DSP remote processor (IPC-only mode)
+ *
+ * This rproc detach callback performs the opposite operation to attach callback
+ * and only needs to release the mailbox, the DSP core is not stopped and will
+ * be left to continue to run its booted firmware. This callback is invoked only
+ * in IPC-only mode.
+ */
+static int k3_dsp_rproc_detach(struct rproc *rproc)
+{
+ struct k3_rproc *kproc = rproc->priv;
+ struct device *dev = kproc->dev;
+
+ mbox_free_channel(kproc->mbox);
+ dev_info(dev, "DSP deinitialized in IPC-only mode\n");
+ return 0;
+}
+
+
+static const struct rproc_ops k3_dsp_rproc_ops = {
+ .start = k3_dsp_rproc_start,
+ .stop = k3_dsp_rproc_stop,
+ .kick = k3_rproc_kick,
+ .da_to_va = k3_rproc_da_to_va,
+};
+
+static int k3_dsp_rproc_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ const struct k3_rproc_dev_data *data;
+ struct k3_rproc *kproc;
+ struct rproc *rproc;
+ const char *fw_name;
+ bool p_state = false;
+ int ret = 0;
+ int ret1;
+
+ data = of_device_get_match_data(dev);
+ if (!data)
+ return -ENODEV;
+
+ ret = rproc_of_parse_firmware(dev, 0, &fw_name);
+ if (ret)
+ return dev_err_probe(dev, ret, "failed to parse firmware-name property\n");
+
+ rproc = rproc_alloc(dev, dev_name(dev), &k3_dsp_rproc_ops, fw_name,
+ sizeof(*kproc));
+ if (!rproc)
+ return -ENOMEM;
+
+ rproc->has_iommu = false;
+ rproc->recovery_disabled = true;
+ if (data->uses_lreset) {
+ rproc->ops->prepare = k3_rproc_prepare;
+ rproc->ops->unprepare = k3_rproc_unprepare;
+ }
+ kproc = rproc->priv;
+ kproc->rproc = rproc;
+ kproc->dev = dev;
+ kproc->data = data;
+
+ kproc->ti_sci = ti_sci_get_by_phandle(np, "ti,sci");
+ if (IS_ERR(kproc->ti_sci)) {
+ ret = dev_err_probe(dev, PTR_ERR(kproc->ti_sci),
+ "failed to get ti-sci handle\n");
+ kproc->ti_sci = NULL;
+ goto free_rproc;
+ }
+
+ ret = of_property_read_u32(np, "ti,sci-dev-id", &kproc->ti_sci_id);
+ if (ret) {
+ dev_err_probe(dev, ret, "missing 'ti,sci-dev-id' property\n");
+ goto put_sci;
+ }
+
+ kproc->reset = devm_reset_control_get_exclusive(dev, NULL);
+ if (IS_ERR(kproc->reset)) {
+ ret = dev_err_probe(dev, PTR_ERR(kproc->reset),
+ "failed to get reset\n");
+ goto put_sci;
+ }
+
+ kproc->tsp = k3_rproc_of_get_tsp(dev, kproc->ti_sci);
+ if (IS_ERR(kproc->tsp)) {
+ ret = dev_err_probe(dev, PTR_ERR(kproc->tsp),
+ "failed to construct ti-sci proc control\n");
+ goto put_sci;
+ }
+
+ ret = ti_sci_proc_request(kproc->tsp);
+ if (ret < 0) {
+ dev_err_probe(dev, ret, "ti_sci_proc_request failed\n");
+ goto free_tsp;
+ }
+
+ ret = k3_rproc_of_get_memories(pdev, kproc);
+ if (ret)
+ goto release_tsp;
+
+ ret = k3_reserved_mem_init(kproc);
+ if (ret) {
+ dev_err_probe(dev, ret, "reserved memory init failed\n");
+ goto release_tsp;
+ }
+
+ ret = kproc->ti_sci->ops.dev_ops.is_on(kproc->ti_sci, kproc->ti_sci_id,
+ NULL, &p_state);
+ if (ret) {
+ dev_err_probe(dev, ret, "failed to get initial state, mode cannot be determined\n");
+ goto release_mem;
+ }
+
+ /* configure J721E devices for either remoteproc or IPC-only mode */
+ if (p_state) {
+ dev_info(dev, "configured DSP for IPC-only mode\n");
+ rproc->state = RPROC_DETACHED;
+ /* override rproc ops with only required IPC-only mode ops */
+ rproc->ops->prepare = NULL;
+ rproc->ops->unprepare = NULL;
+ rproc->ops->start = NULL;
+ rproc->ops->stop = NULL;
+ rproc->ops->attach = k3_dsp_rproc_attach;
+ rproc->ops->detach = k3_dsp_rproc_detach;
+ rproc->ops->get_loaded_rsc_table = k3_get_loaded_rsc_table;
+ } else {
+ dev_info(dev, "configured DSP for remoteproc mode\n");
+ /*
+ * ensure the DSP local reset is asserted to ensure the DSP
+ * doesn't execute bogus code in .prepare() when the module
+ * reset is released.
+ */
+ if (data->uses_lreset) {
+ ret = reset_control_status(kproc->reset);
+ if (ret < 0) {
+ dev_err_probe(dev, ret, "failed to get reset status\n");
+ goto release_mem;
+ } else if (ret == 0) {
+ dev_warn(dev, "local reset is deasserted for device\n");
+ k3_rproc_reset(kproc);
+ }
+ }
+ }
+
+ ret = rproc_add(rproc);
+ if (ret) {
+ dev_err_probe(dev, ret, "failed to add register device with remoteproc core\n");
+ goto release_mem;
+ }
+
+ platform_set_drvdata(pdev, kproc);
+
+ return 0;
+
+release_mem:
+ k3_reserved_mem_exit(kproc);
+release_tsp:
+ ret1 = ti_sci_proc_release(kproc->tsp);
+ if (ret1)
+ dev_err(dev, "failed to release proc (%pe)\n", ERR_PTR(ret1));
+free_tsp:
+ kfree(kproc->tsp);
+put_sci:
+ ret1 = ti_sci_put_handle(kproc->ti_sci);
+ if (ret1)
+ dev_err(dev, "failed to put ti_sci handle (%pe)\n", ERR_PTR(ret1));
+free_rproc:
+ rproc_free(rproc);
+ return ret;
+}
+
+static void k3_dsp_rproc_remove(struct platform_device *pdev)
+{
+ struct k3_rproc *kproc = platform_get_drvdata(pdev);
+ struct rproc *rproc = kproc->rproc;
+ struct device *dev = &pdev->dev;
+ int ret;
+
+ if (rproc->state == RPROC_ATTACHED) {
+ ret = rproc_detach(rproc);
+ if (ret) {
+ /* Note this error path leaks resources */
+ dev_err(dev, "failed to detach proc (%pe)\n", ERR_PTR(ret));
+ return;
+ }
+ }
+
+ rproc_del(kproc->rproc);
+
+ ret = ti_sci_proc_release(kproc->tsp);
+ if (ret)
+ dev_err(dev, "failed to release proc (%pe)\n", ERR_PTR(ret));
+
+ kfree(kproc->tsp);
+
+ ret = ti_sci_put_handle(kproc->ti_sci);
+ if (ret)
+ dev_err(dev, "failed to put ti_sci handle (%pe)\n", ERR_PTR(ret));
+
+ k3_reserved_mem_exit(kproc);
+ rproc_free(kproc->rproc);
+}
+
+static const struct k3_rproc_mem_data c66_mems[] = {
+ { .name = "l2sram", .dev_addr = 0x800000 },
+ { .name = "l1pram", .dev_addr = 0xe00000 },
+ { .name = "l1dram", .dev_addr = 0xf00000 },
+};
+
+/* C71x cores only have a L1P Cache, there are no L1P SRAMs */
+static const struct k3_rproc_mem_data c71_mems[] = {
+ { .name = "l2sram", .dev_addr = 0x800000 },
+ { .name = "l1dram", .dev_addr = 0xe00000 },
+};
+
+static const struct k3_rproc_mem_data c7xv_mems[] = {
+ { .name = "l2sram", .dev_addr = 0x800000 },
+};
+
+static const struct k3_rproc_dev_data c66_data = {
+ .mems = c66_mems,
+ .num_mems = ARRAY_SIZE(c66_mems),
+ .boot_align_addr = SZ_1K,
+ .uses_lreset = true,
+};
+
+static const struct k3_rproc_dev_data c71_data = {
+ .mems = c71_mems,
+ .num_mems = ARRAY_SIZE(c71_mems),
+ .boot_align_addr = SZ_2M,
+ .uses_lreset = false,
+};
+
+static const struct k3_rproc_dev_data c7xv_data = {
+ .mems = c7xv_mems,
+ .num_mems = ARRAY_SIZE(c7xv_mems),
+ .boot_align_addr = SZ_2M,
+ .uses_lreset = false,
+};
+
+static const struct of_device_id k3_dsp_of_match[] = {
+ { .compatible = "ti,j721e-c66-dsp", .data = &c66_data, },
+ { .compatible = "ti,j721e-c71-dsp", .data = &c71_data, },
+ { .compatible = "ti,j721s2-c71-dsp", .data = &c71_data, },
+ { .compatible = "ti,am62a-c7xv-dsp", .data = &c7xv_data, },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, k3_dsp_of_match);
+
+static struct platform_driver k3_dsp_rproc_driver = {
+ .probe = k3_dsp_rproc_probe,
+ .remove_new = k3_dsp_rproc_remove,
+ .driver = {
+ .name = "k3-dsp-rproc",
+ .of_match_table = k3_dsp_of_match,
+ },
+};
+
+module_platform_driver(k3_dsp_rproc_driver);
+
+MODULE_AUTHOR("Suman Anna <s-anna@xxxxxx>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("TI K3 DSP Remoteproc driver");
