config REMOTEPROC
tristate
depends on HAS_DMA
+ select CRC32
select FW_LOADER
select VIRTIO
+ select VIRTUALIZATION
config OMAP_REMOTEPROC
tristate "OMAP remoteproc support"
depends on HAS_DMA
- depends on ARCH_OMAP4
+ depends on ARCH_OMAP4 || SOC_OMAP5
depends on OMAP_IOMMU
depends on OMAP_MBOX_FWK
select REMOTEPROC
This can be either built-in or a loadable module.
If unsure say N.
+config DA8XX_REMOTEPROC
+ tristate "DA8xx/OMAP-L13x remoteproc support"
+ depends on ARCH_DAVINCI_DA8XX
+ select CMA
+ select REMOTEPROC
+ select RPMSG
+ help
+ Say y here to support DA8xx/OMAP-L13x remote processors via the
+ remote processor framework.
+
+ You want to say y here in order to enable AMP
+ use-cases to run on your platform (multimedia codecs are
+ offloaded to remote DSP processors using this framework).
+
+ This module controls the name of the firmware file that gets
+ loaded on the DSP. This file must reside in the /lib/firmware
+ directory. It can be specified via the module parameter
+ da8xx_fw_name=<filename>, and if not specified will default to
+ "rproc-dsp-fw".
+
+ It's safe to say n here if you're not interested in multimedia
+ offloading.
+
endmenu
remoteproc-y += remoteproc_elf_loader.o
obj-$(CONFIG_OMAP_REMOTEPROC) += omap_remoteproc.o
obj-$(CONFIG_STE_MODEM_RPROC) += ste_modem_rproc.o
+obj-$(CONFIG_DA8XX_REMOTEPROC) += da8xx_remoteproc.o
--- /dev/null
+/*
+ * Remote processor machine-specific module for DA8XX
+ *
+ * Copyright (C) 2013 Texas Instruments, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ */
+
+#include <linux/bitops.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/remoteproc.h>
+
+#include <mach/clock.h> /* for davinci_clk_reset_assert/deassert() */
+
+#include "remoteproc_internal.h"
+
+static char *da8xx_fw_name;
+module_param(da8xx_fw_name, charp, S_IRUGO);
+MODULE_PARM_DESC(da8xx_fw_name,
+ "\n\t\tName of DSP firmware file in /lib/firmware"
+ " (if not specified defaults to 'rproc-dsp-fw')");
+
+/*
+ * OMAP-L138 Technical References:
+ * http://www.ti.com/product/omap-l138
+ */
+#define SYSCFG_CHIPSIG0 BIT(0)
+#define SYSCFG_CHIPSIG1 BIT(1)
+#define SYSCFG_CHIPSIG2 BIT(2)
+#define SYSCFG_CHIPSIG3 BIT(3)
+#define SYSCFG_CHIPSIG4 BIT(4)
+
+/**
+ * struct da8xx_rproc - da8xx remote processor instance state
+ * @rproc: rproc handle
+ * @dsp_clk: placeholder for platform's DSP clk
+ * @ack_fxn: chip-specific ack function for ack'ing irq
+ * @irq_data: ack_fxn function parameter
+ * @chipsig: virt ptr to DSP interrupt registers (CHIPSIG & CHIPSIG_CLR)
+ * @bootreg: virt ptr to DSP boot address register (HOST1CFG)
+ * @irq: irq # used by this instance
+ */
+struct da8xx_rproc {
+ struct rproc *rproc;
+ struct clk *dsp_clk;
+ void (*ack_fxn)(struct irq_data *data);
+ struct irq_data *irq_data;
+ void __iomem *chipsig;
+ void __iomem *bootreg;
+ int irq;
+};
+
+/**
+ * handle_event() - inbound virtqueue message workqueue function
+ *
+ * This function is registered as a kernel thread and is scheduled by the
+ * kernel handler.
+ */
+static irqreturn_t handle_event(int irq, void *p)
+{
+ struct rproc *rproc = (struct rproc *)p;
+
+ /* Process incoming buffers on all our vrings */
+ rproc_vq_interrupt(rproc, 0);
+ rproc_vq_interrupt(rproc, 1);
+
+ return IRQ_HANDLED;
+}
+
+/**
+ * da8xx_rproc_callback() - inbound virtqueue message handler
+ *
+ * This handler is invoked directly by the kernel whenever the remote
+ * core (DSP) has modified the state of a virtqueue. There is no
+ * "payload" message indicating the virtqueue index as is the case with
+ * mailbox-based implementations on OMAP4. As such, this handler "polls"
+ * each known virtqueue index for every invocation.
+ */
+static irqreturn_t da8xx_rproc_callback(int irq, void *p)
+{
+ struct rproc *rproc = (struct rproc *)p;
+ struct da8xx_rproc *drproc = (struct da8xx_rproc *)rproc->priv;
+ u32 chipsig;
+
+ chipsig = readl(drproc->chipsig);
+ if (chipsig & SYSCFG_CHIPSIG0) {
+ /* Clear interrupt level source */
+ writel(SYSCFG_CHIPSIG0, drproc->chipsig + 4);
+
+ /*
+ * ACK intr to AINTC.
+ *
+ * It has already been ack'ed by the kernel before calling
+ * this function, but since the ARM<->DSP interrupts in the
+ * CHIPSIG register are "level" instead of "pulse" variety,
+ * we need to ack it after taking down the level else we'll
+ * be called again immediately after returning.
+ */
+ drproc->ack_fxn(drproc->irq_data);
+
+ return IRQ_WAKE_THREAD;
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int da8xx_rproc_start(struct rproc *rproc)
+{
+ struct device *dev = rproc->dev.parent;
+ struct da8xx_rproc *drproc = (struct da8xx_rproc *)rproc->priv;
+ struct clk *dsp_clk = drproc->dsp_clk;
+
+ /* hw requires the start (boot) address be on 1KB boundary */
+ if (rproc->bootaddr & 0x3ff) {
+ dev_err(dev, "invalid boot address: must be aligned to 1KB\n");
+
+ return -EINVAL;
+ }
+
+ writel(rproc->bootaddr, drproc->bootreg);
+
+ clk_enable(dsp_clk);
+ davinci_clk_reset_deassert(dsp_clk);
+
+ return 0;
+}
+
+static int da8xx_rproc_stop(struct rproc *rproc)
+{
+ struct da8xx_rproc *drproc = rproc->priv;
+
+ clk_disable(drproc->dsp_clk);
+
+ return 0;
+}
+
+/* kick a virtqueue */
+static void da8xx_rproc_kick(struct rproc *rproc, int vqid)
+{
+ struct da8xx_rproc *drproc = (struct da8xx_rproc *)rproc->priv;
+
+ /* Interupt remote proc */
+ writel(SYSCFG_CHIPSIG2, drproc->chipsig);
+}
+
+static struct rproc_ops da8xx_rproc_ops = {
+ .start = da8xx_rproc_start,
+ .stop = da8xx_rproc_stop,
+ .kick = da8xx_rproc_kick,
+};
+
+static int reset_assert(struct device *dev)
+{
+ struct clk *dsp_clk;
+
+ dsp_clk = clk_get(dev, NULL);
+ if (IS_ERR(dsp_clk)) {
+ dev_err(dev, "clk_get error: %ld\n", PTR_ERR(dsp_clk));
+ return PTR_RET(dsp_clk);
+ }
+
+ davinci_clk_reset_assert(dsp_clk);
+ clk_put(dsp_clk);
+
+ return 0;
+}
+
+static int da8xx_rproc_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct da8xx_rproc *drproc;
+ struct rproc *rproc;
+ struct irq_data *irq_data;
+ struct resource *bootreg_res;
+ struct resource *chipsig_res;
+ struct clk *dsp_clk;
+ void __iomem *chipsig;
+ void __iomem *bootreg;
+ int irq;
+ int ret;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(dev, "platform_get_irq(pdev, 0) error: %d\n", irq);
+ return irq;
+ }
+
+ irq_data = irq_get_irq_data(irq);
+ if (!irq_data) {
+ dev_err(dev, "irq_get_irq_data(%d): NULL\n", irq);
+ return -EINVAL;
+ }
+
+ bootreg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!bootreg_res) {
+ dev_err(dev,
+ "platform_get_resource(IORESOURCE_MEM, 0): NULL\n");
+ return -EADDRNOTAVAIL;
+ }
+
+ chipsig_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (!chipsig_res) {
+ dev_err(dev,
+ "platform_get_resource(IORESOURCE_MEM, 1): NULL\n");
+ return -EADDRNOTAVAIL;
+ }
+
+ bootreg = devm_ioremap_resource(dev, bootreg_res);
+ if (IS_ERR(bootreg))
+ return PTR_ERR(bootreg);
+
+ chipsig = devm_ioremap_resource(dev, chipsig_res);
+ if (IS_ERR(chipsig))
+ return PTR_ERR(chipsig);
+
+ dsp_clk = devm_clk_get(dev, NULL);
+ if (IS_ERR(dsp_clk)) {
+ dev_err(dev, "clk_get error: %ld\n", PTR_ERR(dsp_clk));
+
+ return PTR_ERR(dsp_clk);
+ }
+
+ rproc = rproc_alloc(dev, "dsp", &da8xx_rproc_ops, da8xx_fw_name,
+ sizeof(*drproc));
+ if (!rproc)
+ return -ENOMEM;
+
+ drproc = rproc->priv;
+ drproc->rproc = rproc;
+
+ platform_set_drvdata(pdev, rproc);
+
+ /* everything the ISR needs is now setup, so hook it up */
+ ret = devm_request_threaded_irq(dev, irq, da8xx_rproc_callback,
+ handle_event, 0, "da8xx-remoteproc",
+ rproc);
+ if (ret) {
+ dev_err(dev, "devm_request_threaded_irq error: %d\n", ret);
+ goto free_rproc;
+ }
+
+ /*
+ * rproc_add() can end up enabling the DSP's clk with the DSP
+ * *not* in reset, but da8xx_rproc_start() needs the DSP to be
+ * held in reset at the time it is called.
+ */
+ ret = reset_assert(dev);
+ if (ret)
+ goto free_rproc;
+
+ drproc->chipsig = chipsig;
+ drproc->bootreg = bootreg;
+ drproc->ack_fxn = irq_data->chip->irq_ack;
+ drproc->irq_data = irq_data;
+ drproc->irq = irq;
+ drproc->dsp_clk = dsp_clk;
+
+ ret = rproc_add(rproc);
+ if (ret) {
+ dev_err(dev, "rproc_add failed: %d\n", ret);
+ goto free_rproc;
+ }
+
+ return 0;
+
+free_rproc:
+ rproc_put(rproc);
+
+ return ret;
+}
+
+static int da8xx_rproc_remove(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct rproc *rproc = platform_get_drvdata(pdev);
+ struct da8xx_rproc *drproc = (struct da8xx_rproc *)rproc->priv;
+
+ /*
+ * It's important to place the DSP in reset before going away,
+ * since a subsequent insmod of this module may enable the DSP's
+ * clock before its program/boot-address has been loaded and
+ * before this module's probe has had a chance to reset the DSP.
+ * Without the reset, the DSP can lockup permanently when it
+ * begins executing garbage.
+ */
+ reset_assert(dev);
+
+ /*
+ * The devm subsystem might end up releasing things before
+ * freeing the irq, thus allowing an interrupt to sneak in while
+ * the device is being removed. This should prevent that.
+ */
+ disable_irq(drproc->irq);
+
+ devm_clk_put(dev, drproc->dsp_clk);
+
+ rproc_del(rproc);
+ rproc_put(rproc);
+
+ return 0;
+}
+
+static struct platform_driver da8xx_rproc_driver = {
+ .probe = da8xx_rproc_probe,
+ .remove = da8xx_rproc_remove,
+ .driver = {
+ .name = "davinci-rproc",
+ .owner = THIS_MODULE,
+ },
+};
+
+module_platform_driver(da8xx_rproc_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("DA8XX Remote Processor control driver");
#include <linux/iommu.h>
#include <linux/idr.h>
#include <linux/elf.h>
+#include <linux/crc32.h>
#include <linux/virtio_ids.h>
#include <linux/virtio_ring.h>
#include <asm/byteorder.h>
typedef int (*rproc_handle_resources_t)(struct rproc *rproc,
struct resource_table *table, int len);
-typedef int (*rproc_handle_resource_t)(struct rproc *rproc, void *, int avail);
+typedef int (*rproc_handle_resource_t)(struct rproc *rproc,
+ void *, int offset, int avail);
/* Unique indices for remoteproc devices */
static DEFINE_IDA(rproc_dev_index);
struct rproc *rproc = rvdev->rproc;
struct device *dev = &rproc->dev;
struct rproc_vring *rvring = &rvdev->vring[i];
+ struct fw_rsc_vdev *rsc;
dma_addr_t dma;
void *va;
int ret, size, notifyid;
/*
* Allocate non-cacheable memory for the vring. In the future
* this call will also configure the IOMMU for us
- * TODO: let the rproc know the da of this vring
*/
va = dma_alloc_coherent(dev->parent, size, &dma, GFP_KERNEL);
if (!va) {
/*
* Assign an rproc-wide unique index for this vring
* TODO: assign a notifyid for rvdev updates as well
- * TODO: let the rproc know the notifyid of this vring
* TODO: support predefined notifyids (via resource table)
*/
ret = idr_alloc(&rproc->notifyids, rvring, 0, 0, GFP_KERNEL);
}
notifyid = ret;
- /* Store largest notifyid */
- rproc->max_notifyid = max(rproc->max_notifyid, notifyid);
-
dev_dbg(dev, "vring%d: va %p dma %llx size %x idr %d\n", i, va,
(unsigned long long)dma, size, notifyid);
rvring->dma = dma;
rvring->notifyid = notifyid;
+ /*
+ * Let the rproc know the notifyid and da of this vring.
+ * Not all platforms use dma_alloc_coherent to automatically
+ * set up the iommu. In this case the device address (da) will
+ * hold the physical address and not the device address.
+ */
+ rsc = (void *)rproc->table_ptr + rvdev->rsc_offset;
+ rsc->vring[i].da = dma;
+ rsc->vring[i].notifyid = notifyid;
return 0;
}
return 0;
}
-static int rproc_max_notifyid(int id, void *p, void *data)
-{
- int *maxid = data;
- *maxid = max(*maxid, id);
- return 0;
-}
-
void rproc_free_vring(struct rproc_vring *rvring)
{
int size = PAGE_ALIGN(vring_size(rvring->len, rvring->align));
struct rproc *rproc = rvring->rvdev->rproc;
- int maxid = 0;
+ int idx = rvring->rvdev->vring - rvring;
+ struct fw_rsc_vdev *rsc;
dma_free_coherent(rproc->dev.parent, size, rvring->va, rvring->dma);
idr_remove(&rproc->notifyids, rvring->notifyid);
- /* Find the largest remaining notifyid */
- idr_for_each(&rproc->notifyids, rproc_max_notifyid, &maxid);
- rproc->max_notifyid = maxid;
+ /* reset resource entry info */
+ rsc = (void *)rproc->table_ptr + rvring->rvdev->rsc_offset;
+ rsc->vring[idx].da = 0;
+ rsc->vring[idx].notifyid = -1;
}
/**
* Returns 0 on success, or an appropriate error code otherwise
*/
static int rproc_handle_vdev(struct rproc *rproc, struct fw_rsc_vdev *rsc,
- int avail)
+ int offset, int avail)
{
struct device *dev = &rproc->dev;
struct rproc_vdev *rvdev;
goto free_rvdev;
}
- /* remember the device features */
- rvdev->dfeatures = rsc->dfeatures;
+ /* remember the resource offset*/
+ rvdev->rsc_offset = offset;
list_add_tail(&rvdev->node, &rproc->rvdevs);
* Returns 0 on success, or an appropriate error code otherwise
*/
static int rproc_handle_trace(struct rproc *rproc, struct fw_rsc_trace *rsc,
- int avail)
+ int offset, int avail)
{
struct rproc_mem_entry *trace;
struct device *dev = &rproc->dev;
* are outside those ranges.
*/
static int rproc_handle_devmem(struct rproc *rproc, struct fw_rsc_devmem *rsc,
- int avail)
+ int offset, int avail)
{
struct rproc_mem_entry *mapping;
struct device *dev = &rproc->dev;
* pressure is important; it may have a substantial impact on performance.
*/
static int rproc_handle_carveout(struct rproc *rproc,
- struct fw_rsc_carveout *rsc, int avail)
+ struct fw_rsc_carveout *rsc,
+ int offset, int avail)
+
{
struct rproc_mem_entry *carveout, *mapping;
struct device *dev = &rproc->dev;
return ret;
}
+static int rproc_count_vrings(struct rproc *rproc, struct fw_rsc_vdev *rsc,
+ int offset, int avail)
+{
+ /* Summarize the number of notification IDs */
+ rproc->max_notifyid += rsc->num_of_vrings;
+
+ return 0;
+}
+
/*
* A lookup table for resource handlers. The indices are defined in
* enum fw_resource_type.
*/
-static rproc_handle_resource_t rproc_handle_rsc[] = {
+static rproc_handle_resource_t rproc_loading_handlers[RSC_LAST] = {
[RSC_CARVEOUT] = (rproc_handle_resource_t)rproc_handle_carveout,
[RSC_DEVMEM] = (rproc_handle_resource_t)rproc_handle_devmem,
[RSC_TRACE] = (rproc_handle_resource_t)rproc_handle_trace,
[RSC_VDEV] = NULL, /* VDEVs were handled upon registrarion */
};
+static rproc_handle_resource_t rproc_vdev_handler[RSC_LAST] = {
+ [RSC_VDEV] = (rproc_handle_resource_t)rproc_handle_vdev,
+};
+
+static rproc_handle_resource_t rproc_count_vrings_handler[RSC_LAST] = {
+ [RSC_VDEV] = (rproc_handle_resource_t)rproc_count_vrings,
+};
+
/* handle firmware resource entries before booting the remote processor */
-static int
-rproc_handle_boot_rsc(struct rproc *rproc, struct resource_table *table, int len)
+static int rproc_handle_resources(struct rproc *rproc, int len,
+ rproc_handle_resource_t handlers[RSC_LAST])
{
struct device *dev = &rproc->dev;
rproc_handle_resource_t handler;
int ret = 0, i;
- for (i = 0; i < table->num; i++) {
- int offset = table->offset[i];
- struct fw_rsc_hdr *hdr = (void *)table + offset;
+ for (i = 0; i < rproc->table_ptr->num; i++) {
+ int offset = rproc->table_ptr->offset[i];
+ struct fw_rsc_hdr *hdr = (void *)rproc->table_ptr + offset;
int avail = len - offset - sizeof(*hdr);
void *rsc = (void *)hdr + sizeof(*hdr);
continue;
}
- handler = rproc_handle_rsc[hdr->type];
+ handler = handlers[hdr->type];
if (!handler)
continue;
- ret = handler(rproc, rsc, avail);
- if (ret)
- break;
- }
-
- return ret;
-}
-
-/* handle firmware resource entries while registering the remote processor */
-static int
-rproc_handle_virtio_rsc(struct rproc *rproc, struct resource_table *table, int len)
-{
- struct device *dev = &rproc->dev;
- int ret = 0, i;
-
- for (i = 0; i < table->num; i++) {
- int offset = table->offset[i];
- struct fw_rsc_hdr *hdr = (void *)table + offset;
- int avail = len - offset - sizeof(*hdr);
- struct fw_rsc_vdev *vrsc;
-
- /* make sure table isn't truncated */
- if (avail < 0) {
- dev_err(dev, "rsc table is truncated\n");
- return -EINVAL;
- }
-
- dev_dbg(dev, "%s: rsc type %d\n", __func__, hdr->type);
-
- if (hdr->type != RSC_VDEV)
- continue;
-
- vrsc = (struct fw_rsc_vdev *)hdr->data;
-
- ret = rproc_handle_vdev(rproc, vrsc, avail);
+ ret = handler(rproc, rsc, offset + sizeof(*hdr), avail);
if (ret)
break;
}
{
struct device *dev = &rproc->dev;
const char *name = rproc->firmware;
- struct resource_table *table;
+ struct resource_table *table, *loaded_table;
int ret, tablesz;
+ if (!rproc->table_ptr)
+ return -ENOMEM;
+
ret = rproc_fw_sanity_check(rproc, fw);
if (ret)
return ret;
goto clean_up;
}
+ /* Verify that resource table in loaded fw is unchanged */
+ if (rproc->table_csum != crc32(0, table, tablesz)) {
+ dev_err(dev, "resource checksum failed, fw changed?\n");
+ ret = -EINVAL;
+ goto clean_up;
+ }
+
/* handle fw resources which are required to boot rproc */
- ret = rproc_handle_boot_rsc(rproc, table, tablesz);
+ ret = rproc_handle_resources(rproc, tablesz, rproc_loading_handlers);
if (ret) {
dev_err(dev, "Failed to process resources: %d\n", ret);
goto clean_up;
goto clean_up;
}
+ /*
+ * The starting device has been given the rproc->cached_table as the
+ * resource table. The address of the vring along with the other
+ * allocated resources (carveouts etc) is stored in cached_table.
+ * In order to pass this information to the remote device we must
+ * copy this information to device memory.
+ */
+ loaded_table = rproc_find_loaded_rsc_table(rproc, fw);
+ if (!loaded_table)
+ goto clean_up;
+
+ memcpy(loaded_table, rproc->cached_table, tablesz);
+
/* power up the remote processor */
ret = rproc->ops->start(rproc);
if (ret) {
goto clean_up;
}
+ /*
+ * Update table_ptr so that all subsequent vring allocations and
+ * virtio fields manipulation update the actual loaded resource table
+ * in device memory.
+ */
+ rproc->table_ptr = loaded_table;
+
rproc->state = RPROC_RUNNING;
dev_info(dev, "remote processor %s is now up\n", rproc->name);
if (!table)
goto out;
- /* look for virtio devices and register them */
- ret = rproc_handle_virtio_rsc(rproc, table, tablesz);
+ rproc->table_csum = crc32(0, table, tablesz);
+
+ /*
+ * Create a copy of the resource table. When a virtio device starts
+ * and calls vring_new_virtqueue() the address of the allocated vring
+ * will be stored in the cached_table. Before the device is started,
+ * cached_table will be copied into devic memory.
+ */
+ rproc->cached_table = kmalloc(tablesz, GFP_KERNEL);
+ if (!rproc->cached_table)
+ goto out;
+
+ memcpy(rproc->cached_table, table, tablesz);
+ rproc->table_ptr = rproc->cached_table;
+
+ /* count the number of notify-ids */
+ rproc->max_notifyid = -1;
+ ret = rproc_handle_resources(rproc, tablesz, rproc_count_vrings_handler);
if (ret)
goto out;
+ /* look for virtio devices and register them */
+ ret = rproc_handle_resources(rproc, tablesz, rproc_vdev_handler);
+
out:
release_firmware(fw);
/* allow rproc_del() contexts, if any, to proceed */
/* wait until there is no more rproc users */
wait_for_completion(&rproc->crash_comp);
+ /* Free the copy of the resource table */
+ kfree(rproc->cached_table);
+
return rproc_add_virtio_devices(rproc);
}
rproc_disable_iommu(rproc);
+ /* Give the next start a clean resource table */
+ rproc->table_ptr = rproc->cached_table;
+
/* if in crash state, unlock crash handler */
if (rproc->state == RPROC_CRASHED)
complete_all(&rproc->crash_comp);
* @dev: the underlying device
* @name: name of this remote processor
* @ops: platform-specific handlers (mainly start/stop)
- * @firmware: name of firmware file to load
+ * @firmware: name of firmware file to load, can be NULL
* @len: length of private data needed by the rproc driver (in bytes)
*
* Allocates a new remote processor handle, but does not register
- * it yet.
+ * it yet. if @firmware is NULL, a default name is used.
*
* This function should be used by rproc implementations during initialization
* of the remote processor.
const char *firmware, int len)
{
struct rproc *rproc;
+ char *p, *template = "rproc-%s-fw";
+ int name_len = 0;
if (!dev || !name || !ops)
return NULL;
- rproc = kzalloc(sizeof(struct rproc) + len, GFP_KERNEL);
+ if (!firmware)
+ /*
+ * Make room for default firmware name (minus %s plus '\0').
+ * If the caller didn't pass in a firmware name then
+ * construct a default name. We're already glomming 'len'
+ * bytes onto the end of the struct rproc allocation, so do
+ * a few more for the default firmware name (but only if
+ * the caller doesn't pass one).
+ */
+ name_len = strlen(name) + strlen(template) - 2 + 1;
+
+ rproc = kzalloc(sizeof(struct rproc) + len + name_len, GFP_KERNEL);
if (!rproc) {
dev_err(dev, "%s: kzalloc failed\n", __func__);
return NULL;
}
+ if (!firmware) {
+ p = (char *)rproc + sizeof(struct rproc) + len;
+ snprintf(p, name_len, template, name);
+ } else {
+ p = (char *)firmware;
+ }
+
+ rproc->firmware = p;
rproc->name = name;
rproc->ops = ops;
- rproc->firmware = firmware;
rproc->priv = &rproc[1];
device_initialize(&rproc->dev);
list_for_each_entry_safe(rvdev, tmp, &rproc->rvdevs, node)
rproc_remove_virtio_dev(rvdev);
+ /* Free the copy of the resource table */
+ kfree(rproc->cached_table);
+
device_del(&rproc->dev);
return 0;
return ret;
}
-/**
- * rproc_elf_find_rsc_table() - find the resource table
- * @rproc: the rproc handle
- * @fw: the ELF firmware image
- * @tablesz: place holder for providing back the table size
- *
- * This function finds the resource table inside the remote processor's
- * firmware. It is used both upon the registration of @rproc (in order
- * to look for and register the supported virito devices), and when the
- * @rproc is booted.
- *
- * Returns the pointer to the resource table if it is found, and write its
- * size into @tablesz. If a valid table isn't found, NULL is returned
- * (and @tablesz isn't set).
- */
-static struct resource_table *
-rproc_elf_find_rsc_table(struct rproc *rproc, const struct firmware *fw,
- int *tablesz)
+static struct elf32_shdr *
+find_table(struct device *dev, struct elf32_hdr *ehdr, size_t fw_size)
{
- struct elf32_hdr *ehdr;
struct elf32_shdr *shdr;
+ int i;
const char *name_table;
- struct device *dev = &rproc->dev;
struct resource_table *table = NULL;
- int i;
- const u8 *elf_data = fw->data;
+ const u8 *elf_data = (void *)ehdr;
- ehdr = (struct elf32_hdr *)elf_data;
+ /* look for the resource table and handle it */
shdr = (struct elf32_shdr *)(elf_data + ehdr->e_shoff);
name_table = elf_data + shdr[ehdr->e_shstrndx].sh_offset;
- /* look for the resource table and handle it */
for (i = 0; i < ehdr->e_shnum; i++, shdr++) {
- int size = shdr->sh_size;
- int offset = shdr->sh_offset;
+ u32 size = shdr->sh_size;
+ u32 offset = shdr->sh_offset;
if (strcmp(name_table + shdr->sh_name, ".resource_table"))
continue;
table = (struct resource_table *)(elf_data + offset);
/* make sure we have the entire table */
- if (offset + size > fw->size) {
+ if (offset + size > fw_size || offset + size < size) {
dev_err(dev, "resource table truncated\n");
return NULL;
}
return NULL;
}
- *tablesz = shdr->sh_size;
- break;
+ return shdr;
}
+ return NULL;
+}
+
+/**
+ * rproc_elf_find_rsc_table() - find the resource table
+ * @rproc: the rproc handle
+ * @fw: the ELF firmware image
+ * @tablesz: place holder for providing back the table size
+ *
+ * This function finds the resource table inside the remote processor's
+ * firmware. It is used both upon the registration of @rproc (in order
+ * to look for and register the supported virito devices), and when the
+ * @rproc is booted.
+ *
+ * Returns the pointer to the resource table if it is found, and write its
+ * size into @tablesz. If a valid table isn't found, NULL is returned
+ * (and @tablesz isn't set).
+ */
+static struct resource_table *
+rproc_elf_find_rsc_table(struct rproc *rproc, const struct firmware *fw,
+ int *tablesz)
+{
+ struct elf32_hdr *ehdr;
+ struct elf32_shdr *shdr;
+ struct device *dev = &rproc->dev;
+ struct resource_table *table = NULL;
+ const u8 *elf_data = fw->data;
+
+ ehdr = (struct elf32_hdr *)elf_data;
+
+ shdr = find_table(dev, ehdr, fw->size);
+ if (!shdr)
+ return NULL;
+
+ table = (struct resource_table *)(elf_data + shdr->sh_offset);
+ *tablesz = shdr->sh_size;
+
return table;
}
+/**
+ * rproc_elf_find_loaded_rsc_table() - find the loaded resource table
+ * @rproc: the rproc handle
+ * @fw: the ELF firmware image
+ *
+ * This function finds the location of the loaded resource table. Don't
+ * call this function if the table wasn't loaded yet - it's a bug if you do.
+ *
+ * Returns the pointer to the resource table if it is found or NULL otherwise.
+ * If the table wasn't loaded yet the result is unspecified.
+ */
+static struct resource_table *
+rproc_elf_find_loaded_rsc_table(struct rproc *rproc, const struct firmware *fw)
+{
+ struct elf32_hdr *ehdr = (struct elf32_hdr *)fw->data;
+ struct elf32_shdr *shdr;
+
+ shdr = find_table(&rproc->dev, ehdr, fw->size);
+ if (!shdr)
+ return NULL;
+
+ return rproc_da_to_va(rproc, shdr->sh_addr, shdr->sh_size);
+}
+
const struct rproc_fw_ops rproc_elf_fw_ops = {
.load = rproc_elf_load_segments,
.find_rsc_table = rproc_elf_find_rsc_table,
+ .find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table,
.sanity_check = rproc_elf_sanity_check,
.get_boot_addr = rproc_elf_get_boot_addr
};
/**
* struct rproc_fw_ops - firmware format specific operations.
- * @find_rsc_table: finds the resource table inside the firmware image
+ * @find_rsc_table: find the resource table inside the firmware image
+ * @find_loaded_rsc_table: find the loaded resouce table
* @load: load firmeware to memory, where the remote processor
* expects to find it
* @sanity_check: sanity check the fw image
struct resource_table *(*find_rsc_table) (struct rproc *rproc,
const struct firmware *fw,
int *tablesz);
+ struct resource_table *(*find_loaded_rsc_table)(struct rproc *rproc,
+ const struct firmware *fw);
int (*load)(struct rproc *rproc, const struct firmware *fw);
int (*sanity_check)(struct rproc *rproc, const struct firmware *fw);
u32 (*get_boot_addr)(struct rproc *rproc, const struct firmware *fw);
return NULL;
}
+static inline
+struct resource_table *rproc_find_loaded_rsc_table(struct rproc *rproc,
+ const struct firmware *fw)
+{
+ if (rproc->fw_ops->find_loaded_rsc_table)
+ return rproc->fw_ops->find_loaded_rsc_table(rproc, fw);
+
+ return NULL;
+}
+
extern const struct rproc_fw_ops rproc_elf_fw_ops;
#endif /* REMOTEPROC_INTERNAL_H */
return ret;
}
-/*
- * We don't support yet real virtio status semantics.
- *
- * The plan is to provide this via the VDEV resource entry
- * which is part of the firmware: this way the remote processor
- * will be able to access the status values as set by us.
- */
static u8 rproc_virtio_get_status(struct virtio_device *vdev)
{
- return 0;
+ struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+ struct fw_rsc_vdev *rsc;
+
+ rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
+
+ return rsc->status;
}
static void rproc_virtio_set_status(struct virtio_device *vdev, u8 status)
{
+ struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+ struct fw_rsc_vdev *rsc;
+
+ rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
+
+ rsc->status = status;
dev_dbg(&vdev->dev, "status: %d\n", status);
}
static void rproc_virtio_reset(struct virtio_device *vdev)
{
+ struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+ struct fw_rsc_vdev *rsc;
+
+ rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
+
+ rsc->status = 0;
dev_dbg(&vdev->dev, "reset !\n");
}
static u32 rproc_virtio_get_features(struct virtio_device *vdev)
{
struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+ struct fw_rsc_vdev *rsc;
+
+ rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
- return rvdev->dfeatures;
+ return rsc->dfeatures;
}
static void rproc_virtio_finalize_features(struct virtio_device *vdev)
{
struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+ struct fw_rsc_vdev *rsc;
+
+ rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
/* Give virtio_ring a chance to accept features */
vring_transport_features(vdev);
/*
* Remember the finalized features of our vdev, and provide it
* to the remote processor once it is powered on.
- *
- * Similarly to the status field, we don't expose yet the negotiated
- * features to the remote processors at this point. This will be
- * fixed as part of a small resource table overhaul and then an
- * extension of the virtio resource entries.
*/
- rvdev->gfeatures = vdev->features[0];
+ rsc->gfeatures = vdev->features[0];
+}
+
+static void rproc_virtio_get(struct virtio_device *vdev, unsigned offset,
+ void *buf, unsigned len)
+{
+ struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+ struct fw_rsc_vdev *rsc;
+ void *cfg;
+
+ rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
+ cfg = &rsc->vring[rsc->num_of_vrings];
+
+ if (offset + len > rsc->config_len || offset + len < len) {
+ dev_err(&vdev->dev, "rproc_virtio_get: access out of bounds\n");
+ return;
+ }
+
+ memcpy(buf, cfg + offset, len);
+}
+
+static void rproc_virtio_set(struct virtio_device *vdev, unsigned offset,
+ const void *buf, unsigned len)
+{
+ struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+ struct fw_rsc_vdev *rsc;
+ void *cfg;
+
+ rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
+ cfg = &rsc->vring[rsc->num_of_vrings];
+
+ if (offset + len > rsc->config_len || offset + len < len) {
+ dev_err(&vdev->dev, "rproc_virtio_set: access out of bounds\n");
+ return;
+ }
+
+ memcpy(cfg + offset, buf, len);
}
static const struct virtio_config_ops rproc_virtio_config_ops = {
.reset = rproc_virtio_reset,
.set_status = rproc_virtio_set_status,
.get_status = rproc_virtio_get_status,
+ .get = rproc_virtio_get,
+ .set = rproc_virtio_set,
};
/*
}
/* Find the entry for resource table in the Table of Content */
-static struct ste_toc_entry *sproc_find_rsc_entry(const struct firmware *fw)
+static const struct ste_toc_entry *sproc_find_rsc_entry(const void *data)
{
int i;
- struct ste_toc *toc;
-
- if (!fw)
- return NULL;
-
- toc = (void *)fw->data;
+ const struct ste_toc *toc;
+ toc = data;
/* Search the table for the resource table */
for (i = 0; i < SPROC_MAX_TOC_ENTRIES &&
toc->table[i].start != 0xffffffff; i++) {
-
if (!strncmp(toc->table[i].name, SPROC_RESOURCE_NAME,
- sizeof(toc->table[i].name))) {
- if (toc->table[i].start > fw->size)
- return NULL;
+ sizeof(toc->table[i].name)))
return &toc->table[i];
- }
}
return NULL;
{
struct sproc *sproc = rproc->priv;
struct resource_table *table;
- struct ste_toc_entry *entry;
+ const struct ste_toc_entry *entry;
- entry = sproc_find_rsc_entry(fw);
+ if (!fw)
+ return NULL;
+
+ entry = sproc_find_rsc_entry(fw->data);
if (!entry) {
sproc_err(sproc, "resource table not found in fw\n");
return NULL;
return table;
}
+/* Find the resource table inside the remote processor's firmware. */
+static struct resource_table *
+sproc_find_loaded_rsc_table(struct rproc *rproc, const struct firmware *fw)
+{
+ struct sproc *sproc = rproc->priv;
+ const struct ste_toc_entry *entry;
+
+ if (!fw || !sproc->fw_addr)
+ return NULL;
+
+ entry = sproc_find_rsc_entry(sproc->fw_addr);
+ if (!entry) {
+ sproc_err(sproc, "resource table not found in fw\n");
+ return NULL;
+ }
+
+ return sproc->fw_addr + entry->start;
+}
+
/* STE modem firmware handler operations */
const struct rproc_fw_ops sproc_fw_ops = {
.load = sproc_load_segments,
.find_rsc_table = sproc_find_rsc_table,
+ .find_loaded_rsc_table = sproc_find_loaded_rsc_table,
};
/* Kick the modem with specified notification id */
}
/* Subscribe to notifications */
- for (i = 0; i < rproc->max_notifyid; i++) {
+ for (i = 0; i <= rproc->max_notifyid; i++) {
err = sproc->mdev->ops.kick_subscribe(sproc->mdev, i);
if (err) {
sproc_err(sproc,
* @crash_comp: completion used to sync crash handler and the rproc reload
* @recovery_disabled: flag that state if recovery was disabled
* @max_notifyid: largest allocated notify id.
+ * @table_ptr: pointer to the resource table in effect
+ * @cached_table: copy of the resource table
+ * @table_csum: checksum of the resource table
*/
struct rproc {
struct klist_node node;
struct completion crash_comp;
bool recovery_disabled;
int max_notifyid;
+ struct resource_table *table_ptr;
+ struct resource_table *cached_table;
+ u32 table_csum;
};
/* we currently support only two vrings per rvdev */
+
#define RVDEV_NUM_VRINGS 2
/**
* @rproc: the rproc handle
* @vdev: the virio device
* @vring: the vrings for this vdev
- * @dfeatures: virtio device features
- * @gfeatures: virtio guest features
+ * @rsc_offset: offset of the vdev's resource entry
*/
struct rproc_vdev {
struct list_head node;
struct rproc *rproc;
struct virtio_device vdev;
struct rproc_vring vring[RVDEV_NUM_VRINGS];
- unsigned long dfeatures;
- unsigned long gfeatures;
+ u32 rsc_offset;
};
struct rproc *rproc_alloc(struct device *dev, const char *name,
projects / firefly-linux-kernel-4.4.55.git / commitdiff