| Message ID | 20240202175538.1705-4-hnagalla@ti.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | TI K3 M4F support on AM64x and AM62x SoCs | expand |
On 2/2/24 11:55 AM, Hari Nagalla wrote: > From: Martyn Welch <martyn.welch@collabora.com> > > In the next commit we will be adding the M4F driver which shares a lot of > commonality with the DSP driver. Move this shared functionality out so > that it can be used by both drivers. > > Signed-off-by: Martyn Welch <martyn.welch@collabora.com> > Signed-off-by: Hari Nagalla <hnagalla@ti.com> > --- > Changes since v2: > - New patch (reordered refactored from v2) > > Changes since v3: > - Removed "ipc_only" element from k3_rproc structure > - Refactored to bring 3 more common functions > > Changes since v4: > - None > > Changes since v5: > - Rearranged the functions order to match with the functions in > ti_k3_dsp_remoteproc.c to ease review. > > Changes since v6: > - Generated patch with -M/-B/-C options > You where asked to generate this patch "correctly" with these options, not just use them all and hope for the best.. Now it looks like you re-wrote all of ti_k3_dsp_remoteproc.c when you only factored out a couple functions to a different file. Build up the new ti_k3_common.c one function per patch if it helps. And factor the functions out of ti_k3_r5 also as it seems many of these are common to that driver too. Andrew > link to v6: > https://lore.kernel.org/all/20230913111644.29889-4-hnagalla@ti.com/ > > 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@ti.com> > + */ > + > +#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@ti.com> > - */ > - > -#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@ti.com>"); > -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@ti.com> > + */ > + > +#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@ti.com>"); > +MODULE_LICENSE("GPL v2"); > +MODULE_DESCRIPTION("TI K3 DSP Remoteproc driver");
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@ti.com> + */ + +#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@ti.com> - */ - -#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@ti.com>"); -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@ti.com> + */ + +#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@ti.com>"); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("TI K3 DSP Remoteproc driver");