--- /dev/null
+Qualcomm WCNSS Peripheral Image Loader
+
+This document defines the binding for a component that loads and boots firmware
+on the Qualcomm WCNSS core.
+
+- compatible:
+ Usage: required
+ Value type: <string>
+ Definition: must be one of:
+ "qcom,riva-pil",
+ "qcom,pronto-v1-pil",
+ "qcom,pronto-v2-pil"
+
+- reg:
+ Usage: required
+ Value type: <prop-encoded-array>
+ Definition: must specify the base address and size of the CCU, DXE and
+ PMU register blocks
+
+- reg-names:
+ Usage: required
+ Value type: <stringlist>
+ Definition: must be "ccu", "dxe", "pmu"
+
+- interrupts-extended:
+ Usage: required
+ Value type: <prop-encoded-array>
+ Definition: must list the watchdog and fatal IRQs and may specify the
+ ready, handover and stop-ack IRQs
+
+- interrupt-names:
+ Usage: required
+ Value type: <stringlist>
+ Definition: should be "wdog", "fatal", optionally followed by "ready",
+ "handover", "stop-ack"
+
+- vddmx-supply:
+- vddcx-supply:
+- vddpx-supply:
+ Usage: required
+ Value type: <phandle>
+ Definition: reference to the regulators to be held on behalf of the
+ booting of the WCNSS core
+
+- qcom,smem-states:
+ Usage: optional
+ Value type: <prop-encoded-array>
+ Definition: reference to the SMEM state used to indicate to WCNSS that
+ it should shut down
+
+- qcom,smem-state-names:
+ Usage: optional
+ Value type: <stringlist>
+ Definition: should be "stop"
+
+- memory-region:
+ Usage: required
+ Value type: <prop-encoded-array>
+ Definition: reference to reserved-memory node for the remote processor
+ see ../reserved-memory/reserved-memory.txt
+
+= SUBNODES
+A single subnode of the WCNSS PIL describes the attached rf module and its
+resource dependencies.
+
+- compatible:
+ Usage: required
+ Value type: <string>
+ Definition: must be one of:
+ "qcom,wcn3620",
+ "qcom,wcn3660",
+ "qcom,wcn3680"
+
+- clocks:
+ Usage: required
+ Value type: <prop-encoded-array>
+ Definition: should specify the xo clock and optionally the rf clock
+
+- clock-names:
+ Usage: required
+ Value type: <stringlist>
+ Definition: should be "xo", optionally followed by "rf"
+
+- vddxo-supply:
+- vddrfa-supply:
+- vddpa-supply:
+- vdddig-supply:
+ Usage: required
+ Value type: <phandle>
+ Definition: reference to the regulators to be held on behalf of the
+ booting of the WCNSS core
+
+= EXAMPLE
+The following example describes the resources needed to boot control the WCNSS,
+with attached WCN3680, as it is commonly found on MSM8974 boards.
+
+pronto@fb204000 {
+ compatible = "qcom,pronto-v2-pil";
+ reg = <0xfb204000 0x2000>, <0xfb202000 0x1000>, <0xfb21b000 0x3000>;
+ reg-names = "ccu", "dxe", "pmu";
+
+ interrupts-extended = <&intc 0 149 1>,
+ <&wcnss_smp2p_slave 0 0>,
+ <&wcnss_smp2p_slave 1 0>,
+ <&wcnss_smp2p_slave 2 0>,
+ <&wcnss_smp2p_slave 3 0>;
+ interrupt-names = "wdog", "fatal", "ready", "handover", "stop-ack";
+
+ vddmx-supply = <&pm8841_s1>;
+ vddcx-supply = <&pm8841_s2>;
+ vddpx-supply = <&pm8941_s3>;
+
+ qcom,smem-states = <&wcnss_smp2p_out 0>;
+ qcom,smem-state-names = "stop";
+
+ memory-region = <&wcnss_region>;
+
+ pinctrl-names = "default";
+ pinctrl-0 = <&wcnss_pin_a>;
+
+ iris {
+ compatible = "qcom,wcn3680";
+
+ clocks = <&rpmcc RPM_CXO_CLK_SRC>, <&rpmcc RPM_CXO_A2>;
+ clock-names = "xo", "rf";
+
+ vddxo-supply = <&pm8941_l6>;
+ vddrfa-supply = <&pm8941_l11>;
+ vddpa-supply = <&pm8941_l19>;
+ vdddig-supply = <&pm8941_s3>;
+ };
+};
select REMOTEPROC
select MAILBOX
select OMAP2PLUS_MBOX
- select RPMSG
+ select RPMSG_VIRTIO
help
Say y here to support OMAP's remote processors (dual M3
and DSP on OMAP4) via the remote processor framework.
depends on ARCH_DAVINCI_DA8XX
select CMA if MMU
select REMOTEPROC
- select RPMSG
+ select RPMSG_VIRTIO
help
Say y here to support DA8xx/OMAP-L13x remote processors via the
remote processor framework.
Say y here to support the Qualcomm Peripherial Image Loader for the
Hexagon V5 based remote processors.
+config QCOM_WCNSS_IRIS
+ tristate
+ depends on OF && ARCH_QCOM
+
+config QCOM_WCNSS_PIL
+ tristate "Qualcomm WCNSS Peripheral Image Loader"
+ depends on OF && ARCH_QCOM
+ depends on QCOM_SMEM
+ select QCOM_MDT_LOADER
+ select QCOM_SCM
+ select QCOM_WCNSS_IRIS
+ select REMOTEPROC
+ help
+ Say y here to support the Peripheral Image Loader for the Qualcomm
+ Wireless Connectivity Subsystem.
+
config ST_REMOTEPROC
tristate "ST remoteproc support"
depends on ARCH_STI
obj-$(CONFIG_DA8XX_REMOTEPROC) += da8xx_remoteproc.o
obj-$(CONFIG_QCOM_MDT_LOADER) += qcom_mdt_loader.o
obj-$(CONFIG_QCOM_Q6V5_PIL) += qcom_q6v5_pil.o
+obj-$(CONFIG_QCOM_WCNSS_IRIS) += qcom_wcnss_iris.o
+obj-$(CONFIG_QCOM_WCNSS_PIL) += qcom_wcnss.o
obj-$(CONFIG_ST_REMOTEPROC) += st_remoteproc.o
{
struct da8xx_rproc *drproc = (struct da8xx_rproc *)rproc->priv;
- /* Interupt remote proc */
+ /* Interrupt remote proc */
writel(SYSCFG_CHIPSIG2, drproc->chipsig);
}
/* send the index of the triggered virtqueue in the mailbox payload */
ret = mbox_send_message(oproc->mbox, (void *)vqid);
if (ret < 0)
- dev_err(dev, "omap_mbox_msg_send failed: %d\n", ret);
+ dev_err(dev, "failed to send mailbox message, status = %d\n",
+ ret);
}
/*
}
rproc = rproc_alloc(&pdev->dev, pdata->name, &omap_rproc_ops,
- pdata->firmware, sizeof(*oproc));
+ pdata->firmware, sizeof(*oproc));
if (!rproc)
return -ENOMEM;
goto free_rproc;
qproc->state = qcom_smem_state_get(&pdev->dev, "stop", &qproc->stop_bit);
- if (IS_ERR(qproc->state))
+ if (IS_ERR(qproc->state)) {
+ ret = PTR_ERR(qproc->state);
goto free_rproc;
+ }
ret = rproc_add(rproc);
if (ret)
--- /dev/null
+/*
+ * Qualcomm Wireless Connectivity Subsystem Peripheral Image Loader
+ *
+ * Copyright (C) 2016 Linaro Ltd
+ * Copyright (C) 2014 Sony Mobile Communications AB
+ * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/firmware.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/qcom_scm.h>
+#include <linux/regulator/consumer.h>
+#include <linux/remoteproc.h>
+#include <linux/soc/qcom/smem.h>
+#include <linux/soc/qcom/smem_state.h>
+
+#include "qcom_mdt_loader.h"
+#include "remoteproc_internal.h"
+#include "qcom_wcnss.h"
+
+#define WCNSS_CRASH_REASON_SMEM 422
+#define WCNSS_FIRMWARE_NAME "wcnss.mdt"
+#define WCNSS_PAS_ID 6
+
+#define WCNSS_SPARE_NVBIN_DLND BIT(25)
+
+#define WCNSS_PMU_IRIS_XO_CFG BIT(3)
+#define WCNSS_PMU_IRIS_XO_EN BIT(4)
+#define WCNSS_PMU_GC_BUS_MUX_SEL_TOP BIT(5)
+#define WCNSS_PMU_IRIS_XO_CFG_STS BIT(6) /* 1: in progress, 0: done */
+
+#define WCNSS_PMU_IRIS_RESET BIT(7)
+#define WCNSS_PMU_IRIS_RESET_STS BIT(8) /* 1: in progress, 0: done */
+#define WCNSS_PMU_IRIS_XO_READ BIT(9)
+#define WCNSS_PMU_IRIS_XO_READ_STS BIT(10)
+
+#define WCNSS_PMU_XO_MODE_MASK GENMASK(2, 1)
+#define WCNSS_PMU_XO_MODE_19p2 0
+#define WCNSS_PMU_XO_MODE_48 3
+
+struct wcnss_data {
+ size_t pmu_offset;
+ size_t spare_offset;
+
+ const struct wcnss_vreg_info *vregs;
+ size_t num_vregs;
+};
+
+struct qcom_wcnss {
+ struct device *dev;
+ struct rproc *rproc;
+
+ void __iomem *pmu_cfg;
+ void __iomem *spare_out;
+
+ bool use_48mhz_xo;
+
+ int wdog_irq;
+ int fatal_irq;
+ int ready_irq;
+ int handover_irq;
+ int stop_ack_irq;
+
+ struct qcom_smem_state *state;
+ unsigned stop_bit;
+
+ struct mutex iris_lock;
+ struct qcom_iris *iris;
+
+ struct regulator_bulk_data *vregs;
+ size_t num_vregs;
+
+ struct completion start_done;
+ struct completion stop_done;
+
+ phys_addr_t mem_phys;
+ phys_addr_t mem_reloc;
+ void *mem_region;
+ size_t mem_size;
+};
+
+static const struct wcnss_data riva_data = {
+ .pmu_offset = 0x28,
+ .spare_offset = 0xb4,
+
+ .vregs = (struct wcnss_vreg_info[]) {
+ { "vddmx", 1050000, 1150000, 0 },
+ { "vddcx", 1050000, 1150000, 0 },
+ { "vddpx", 1800000, 1800000, 0 },
+ },
+ .num_vregs = 3,
+};
+
+static const struct wcnss_data pronto_v1_data = {
+ .pmu_offset = 0x1004,
+ .spare_offset = 0x1088,
+
+ .vregs = (struct wcnss_vreg_info[]) {
+ { "vddmx", 950000, 1150000, 0 },
+ { "vddcx", .super_turbo = true},
+ { "vddpx", 1800000, 1800000, 0 },
+ },
+ .num_vregs = 3,
+};
+
+static const struct wcnss_data pronto_v2_data = {
+ .pmu_offset = 0x1004,
+ .spare_offset = 0x1088,
+
+ .vregs = (struct wcnss_vreg_info[]) {
+ { "vddmx", 1287500, 1287500, 0 },
+ { "vddcx", .super_turbo = true },
+ { "vddpx", 1800000, 1800000, 0 },
+ },
+ .num_vregs = 3,
+};
+
+void qcom_wcnss_assign_iris(struct qcom_wcnss *wcnss,
+ struct qcom_iris *iris,
+ bool use_48mhz_xo)
+{
+ mutex_lock(&wcnss->iris_lock);
+
+ wcnss->iris = iris;
+ wcnss->use_48mhz_xo = use_48mhz_xo;
+
+ mutex_unlock(&wcnss->iris_lock);
+}
+EXPORT_SYMBOL_GPL(qcom_wcnss_assign_iris);
+
+static int wcnss_load(struct rproc *rproc, const struct firmware *fw)
+{
+ struct qcom_wcnss *wcnss = (struct qcom_wcnss *)rproc->priv;
+ phys_addr_t fw_addr;
+ size_t fw_size;
+ bool relocate;
+ int ret;
+
+ ret = qcom_scm_pas_init_image(WCNSS_PAS_ID, fw->data, fw->size);
+ if (ret) {
+ dev_err(&rproc->dev, "invalid firmware metadata\n");
+ return ret;
+ }
+
+ ret = qcom_mdt_parse(fw, &fw_addr, &fw_size, &relocate);
+ if (ret) {
+ dev_err(&rproc->dev, "failed to parse mdt header\n");
+ return ret;
+ }
+
+ if (relocate) {
+ wcnss->mem_reloc = fw_addr;
+
+ ret = qcom_scm_pas_mem_setup(WCNSS_PAS_ID, wcnss->mem_phys, fw_size);
+ if (ret) {
+ dev_err(&rproc->dev, "unable to setup memory for image\n");
+ return ret;
+ }
+ }
+
+ return qcom_mdt_load(rproc, fw, rproc->firmware);
+}
+
+static const struct rproc_fw_ops wcnss_fw_ops = {
+ .find_rsc_table = qcom_mdt_find_rsc_table,
+ .load = wcnss_load,
+};
+
+static void wcnss_indicate_nv_download(struct qcom_wcnss *wcnss)
+{
+ u32 val;
+
+ /* Indicate NV download capability */
+ val = readl(wcnss->spare_out);
+ val |= WCNSS_SPARE_NVBIN_DLND;
+ writel(val, wcnss->spare_out);
+}
+
+static void wcnss_configure_iris(struct qcom_wcnss *wcnss)
+{
+ u32 val;
+
+ /* Clear PMU cfg register */
+ writel(0, wcnss->pmu_cfg);
+
+ val = WCNSS_PMU_GC_BUS_MUX_SEL_TOP | WCNSS_PMU_IRIS_XO_EN;
+ writel(val, wcnss->pmu_cfg);
+
+ /* Clear XO_MODE */
+ val &= ~WCNSS_PMU_XO_MODE_MASK;
+ if (wcnss->use_48mhz_xo)
+ val |= WCNSS_PMU_XO_MODE_48 << 1;
+ else
+ val |= WCNSS_PMU_XO_MODE_19p2 << 1;
+ writel(val, wcnss->pmu_cfg);
+
+ /* Reset IRIS */
+ val |= WCNSS_PMU_IRIS_RESET;
+ writel(val, wcnss->pmu_cfg);
+
+ /* Wait for PMU.iris_reg_reset_sts */
+ while (readl(wcnss->pmu_cfg) & WCNSS_PMU_IRIS_RESET_STS)
+ cpu_relax();
+
+ /* Clear IRIS reset */
+ val &= ~WCNSS_PMU_IRIS_RESET;
+ writel(val, wcnss->pmu_cfg);
+
+ /* Start IRIS XO configuration */
+ val |= WCNSS_PMU_IRIS_XO_CFG;
+ writel(val, wcnss->pmu_cfg);
+
+ /* Wait for XO configuration to finish */
+ while (readl(wcnss->pmu_cfg) & WCNSS_PMU_IRIS_XO_CFG_STS)
+ cpu_relax();
+
+ /* Stop IRIS XO configuration */
+ val &= ~WCNSS_PMU_GC_BUS_MUX_SEL_TOP;
+ val &= ~WCNSS_PMU_IRIS_XO_CFG;
+ writel(val, wcnss->pmu_cfg);
+
+ /* Add some delay for XO to settle */
+ msleep(20);
+}
+
+static int wcnss_start(struct rproc *rproc)
+{
+ struct qcom_wcnss *wcnss = (struct qcom_wcnss *)rproc->priv;
+ int ret;
+
+ mutex_lock(&wcnss->iris_lock);
+ if (!wcnss->iris) {
+ dev_err(wcnss->dev, "no iris registered\n");
+ ret = -EINVAL;
+ goto release_iris_lock;
+ }
+
+ ret = regulator_bulk_enable(wcnss->num_vregs, wcnss->vregs);
+ if (ret)
+ goto release_iris_lock;
+
+ ret = qcom_iris_enable(wcnss->iris);
+ if (ret)
+ goto disable_regulators;
+
+ wcnss_indicate_nv_download(wcnss);
+ wcnss_configure_iris(wcnss);
+
+ ret = qcom_scm_pas_auth_and_reset(WCNSS_PAS_ID);
+ if (ret) {
+ dev_err(wcnss->dev,
+ "failed to authenticate image and release reset\n");
+ goto disable_iris;
+ }
+
+ ret = wait_for_completion_timeout(&wcnss->start_done,
+ msecs_to_jiffies(5000));
+ if (wcnss->ready_irq > 0 && ret == 0) {
+ /* We have a ready_irq, but it didn't fire in time. */
+ dev_err(wcnss->dev, "start timed out\n");
+ qcom_scm_pas_shutdown(WCNSS_PAS_ID);
+ ret = -ETIMEDOUT;
+ goto disable_iris;
+ }
+
+ ret = 0;
+
+disable_iris:
+ qcom_iris_disable(wcnss->iris);
+disable_regulators:
+ regulator_bulk_disable(wcnss->num_vregs, wcnss->vregs);
+release_iris_lock:
+ mutex_unlock(&wcnss->iris_lock);
+
+ return ret;
+}
+
+static int wcnss_stop(struct rproc *rproc)
+{
+ struct qcom_wcnss *wcnss = (struct qcom_wcnss *)rproc->priv;
+ int ret;
+
+ if (wcnss->state) {
+ qcom_smem_state_update_bits(wcnss->state,
+ BIT(wcnss->stop_bit),
+ BIT(wcnss->stop_bit));
+
+ ret = wait_for_completion_timeout(&wcnss->stop_done,
+ msecs_to_jiffies(5000));
+ if (ret == 0)
+ dev_err(wcnss->dev, "timed out on wait\n");
+
+ qcom_smem_state_update_bits(wcnss->state,
+ BIT(wcnss->stop_bit),
+ 0);
+ }
+
+ ret = qcom_scm_pas_shutdown(WCNSS_PAS_ID);
+ if (ret)
+ dev_err(wcnss->dev, "failed to shutdown: %d\n", ret);
+
+ return ret;
+}
+
+static void *wcnss_da_to_va(struct rproc *rproc, u64 da, int len)
+{
+ struct qcom_wcnss *wcnss = (struct qcom_wcnss *)rproc->priv;
+ int offset;
+
+ offset = da - wcnss->mem_reloc;
+ if (offset < 0 || offset + len > wcnss->mem_size)
+ return NULL;
+
+ return wcnss->mem_region + offset;
+}
+
+static const struct rproc_ops wcnss_ops = {
+ .start = wcnss_start,
+ .stop = wcnss_stop,
+ .da_to_va = wcnss_da_to_va,
+};
+
+static irqreturn_t wcnss_wdog_interrupt(int irq, void *dev)
+{
+ struct qcom_wcnss *wcnss = dev;
+
+ rproc_report_crash(wcnss->rproc, RPROC_WATCHDOG);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t wcnss_fatal_interrupt(int irq, void *dev)
+{
+ struct qcom_wcnss *wcnss = dev;
+ size_t len;
+ char *msg;
+
+ msg = qcom_smem_get(QCOM_SMEM_HOST_ANY, WCNSS_CRASH_REASON_SMEM, &len);
+ if (!IS_ERR(msg) && len > 0 && msg[0])
+ dev_err(wcnss->dev, "fatal error received: %s\n", msg);
+
+ rproc_report_crash(wcnss->rproc, RPROC_FATAL_ERROR);
+
+ if (!IS_ERR(msg))
+ msg[0] = '\0';
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t wcnss_ready_interrupt(int irq, void *dev)
+{
+ struct qcom_wcnss *wcnss = dev;
+
+ complete(&wcnss->start_done);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t wcnss_handover_interrupt(int irq, void *dev)
+{
+ /*
+ * XXX: At this point we're supposed to release the resources that we
+ * have been holding on behalf of the WCNSS. Unfortunately this
+ * interrupt comes way before the other side seems to be done.
+ *
+ * So we're currently relying on the ready interrupt firing later then
+ * this and we just disable the resources at the end of wcnss_start().
+ */
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t wcnss_stop_ack_interrupt(int irq, void *dev)
+{
+ struct qcom_wcnss *wcnss = dev;
+
+ complete(&wcnss->stop_done);
+
+ return IRQ_HANDLED;
+}
+
+static int wcnss_init_regulators(struct qcom_wcnss *wcnss,
+ const struct wcnss_vreg_info *info,
+ int num_vregs)
+{
+ struct regulator_bulk_data *bulk;
+ int ret;
+ int i;
+
+ bulk = devm_kcalloc(wcnss->dev,
+ num_vregs, sizeof(struct regulator_bulk_data),
+ GFP_KERNEL);
+ if (!bulk)
+ return -ENOMEM;
+
+ for (i = 0; i < num_vregs; i++)
+ bulk[i].supply = info[i].name;
+
+ ret = devm_regulator_bulk_get(wcnss->dev, num_vregs, bulk);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < num_vregs; i++) {
+ if (info[i].max_voltage)
+ regulator_set_voltage(bulk[i].consumer,
+ info[i].min_voltage,
+ info[i].max_voltage);
+
+ if (info[i].load_uA)
+ regulator_set_load(bulk[i].consumer, info[i].load_uA);
+ }
+
+ wcnss->vregs = bulk;
+ wcnss->num_vregs = num_vregs;
+
+ return 0;
+}
+
+static int wcnss_request_irq(struct qcom_wcnss *wcnss,
+ struct platform_device *pdev,
+ const char *name,
+ bool optional,
+ irq_handler_t thread_fn)
+{
+ int ret;
+
+ ret = platform_get_irq_byname(pdev, name);
+ if (ret < 0 && optional) {
+ dev_dbg(&pdev->dev, "no %s IRQ defined, ignoring\n", name);
+ return 0;
+ } else if (ret < 0) {
+ dev_err(&pdev->dev, "no %s IRQ defined\n", name);
+ return ret;
+ }
+
+ ret = devm_request_threaded_irq(&pdev->dev, ret,
+ NULL, thread_fn,
+ IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+ "wcnss", wcnss);
+ if (ret)
+ dev_err(&pdev->dev, "request %s IRQ failed\n", name);
+
+ return ret;
+}
+
+static int wcnss_alloc_memory_region(struct qcom_wcnss *wcnss)
+{
+ struct device_node *node;
+ struct resource r;
+ int ret;
+
+ node = of_parse_phandle(wcnss->dev->of_node, "memory-region", 0);
+ if (!node) {
+ dev_err(wcnss->dev, "no memory-region specified\n");
+ return -EINVAL;
+ }
+
+ ret = of_address_to_resource(node, 0, &r);
+ if (ret)
+ return ret;
+
+ wcnss->mem_phys = wcnss->mem_reloc = r.start;
+ wcnss->mem_size = resource_size(&r);
+ wcnss->mem_region = devm_ioremap_wc(wcnss->dev, wcnss->mem_phys, wcnss->mem_size);
+ if (!wcnss->mem_region) {
+ dev_err(wcnss->dev, "unable to map memory region: %pa+%zx\n",
+ &r.start, wcnss->mem_size);
+ return -EBUSY;
+ }
+
+ return 0;
+}
+
+static int wcnss_probe(struct platform_device *pdev)
+{
+ const struct wcnss_data *data;
+ struct qcom_wcnss *wcnss;
+ struct resource *res;
+ struct rproc *rproc;
+ void __iomem *mmio;
+ int ret;
+
+ data = of_device_get_match_data(&pdev->dev);
+
+ if (!qcom_scm_is_available())
+ return -EPROBE_DEFER;
+
+ if (!qcom_scm_pas_supported(WCNSS_PAS_ID)) {
+ dev_err(&pdev->dev, "PAS is not available for WCNSS\n");
+ return -ENXIO;
+ }
+
+ rproc = rproc_alloc(&pdev->dev, pdev->name, &wcnss_ops,
+ WCNSS_FIRMWARE_NAME, sizeof(*wcnss));
+ if (!rproc) {
+ dev_err(&pdev->dev, "unable to allocate remoteproc\n");
+ return -ENOMEM;
+ }
+
+ rproc->fw_ops = &wcnss_fw_ops;
+
+ wcnss = (struct qcom_wcnss *)rproc->priv;
+ wcnss->dev = &pdev->dev;
+ wcnss->rproc = rproc;
+ platform_set_drvdata(pdev, wcnss);
+
+ init_completion(&wcnss->start_done);
+ init_completion(&wcnss->stop_done);
+
+ mutex_init(&wcnss->iris_lock);
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pmu");
+ mmio = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(mmio)) {
+ ret = PTR_ERR(mmio);
+ goto free_rproc;
+ };
+
+ ret = wcnss_alloc_memory_region(wcnss);
+ if (ret)
+ goto free_rproc;
+
+ wcnss->pmu_cfg = mmio + data->pmu_offset;
+ wcnss->spare_out = mmio + data->spare_offset;
+
+ ret = wcnss_init_regulators(wcnss, data->vregs, data->num_vregs);
+ if (ret)
+ goto free_rproc;
+
+ ret = wcnss_request_irq(wcnss, pdev, "wdog", false, wcnss_wdog_interrupt);
+ if (ret < 0)
+ goto free_rproc;
+ wcnss->wdog_irq = ret;
+
+ ret = wcnss_request_irq(wcnss, pdev, "fatal", false, wcnss_fatal_interrupt);
+ if (ret < 0)
+ goto free_rproc;
+ wcnss->fatal_irq = ret;
+
+ ret = wcnss_request_irq(wcnss, pdev, "ready", true, wcnss_ready_interrupt);
+ if (ret < 0)
+ goto free_rproc;
+ wcnss->ready_irq = ret;
+
+ ret = wcnss_request_irq(wcnss, pdev, "handover", true, wcnss_handover_interrupt);
+ if (ret < 0)
+ goto free_rproc;
+ wcnss->handover_irq = ret;
+
+ ret = wcnss_request_irq(wcnss, pdev, "stop-ack", true, wcnss_stop_ack_interrupt);
+ if (ret < 0)
+ goto free_rproc;
+ wcnss->stop_ack_irq = ret;
+
+ if (wcnss->stop_ack_irq) {
+ wcnss->state = qcom_smem_state_get(&pdev->dev, "stop",
+ &wcnss->stop_bit);
+ if (IS_ERR(wcnss->state)) {
+ ret = PTR_ERR(wcnss->state);
+ goto free_rproc;
+ }
+ }
+
+ ret = rproc_add(rproc);
+ if (ret)
+ goto free_rproc;
+
+ return of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
+
+free_rproc:
+ rproc_put(rproc);
+
+ return ret;
+}
+
+static int wcnss_remove(struct platform_device *pdev)
+{
+ struct qcom_wcnss *wcnss = platform_get_drvdata(pdev);
+
+ of_platform_depopulate(&pdev->dev);
+
+ qcom_smem_state_put(wcnss->state);
+ rproc_del(wcnss->rproc);
+ rproc_put(wcnss->rproc);
+
+ return 0;
+}
+
+static const struct of_device_id wcnss_of_match[] = {
+ { .compatible = "qcom,riva-pil", &riva_data },
+ { .compatible = "qcom,pronto-v1-pil", &pronto_v1_data },
+ { .compatible = "qcom,pronto-v2-pil", &pronto_v2_data },
+ { },
+};
+
+static struct platform_driver wcnss_driver = {
+ .probe = wcnss_probe,
+ .remove = wcnss_remove,
+ .driver = {
+ .name = "qcom-wcnss-pil",
+ .of_match_table = wcnss_of_match,
+ },
+};
+
+module_platform_driver(wcnss_driver);
+MODULE_DESCRIPTION("Qualcomm Peripherial Image Loader for Wireless Subsystem");
+MODULE_LICENSE("GPL v2");
--- /dev/null
+#ifndef __QCOM_WNCSS_H__
+#define __QCOM_WNCSS_H__
+
+struct qcom_iris;
+struct qcom_wcnss;
+
+struct wcnss_vreg_info {
+ const char * const name;
+ int min_voltage;
+ int max_voltage;
+
+ int load_uA;
+
+ bool super_turbo;
+};
+
+int qcom_iris_enable(struct qcom_iris *iris);
+void qcom_iris_disable(struct qcom_iris *iris);
+
+void qcom_wcnss_assign_iris(struct qcom_wcnss *wcnss, struct qcom_iris *iris, bool use_48mhz_xo);
+
+#endif
--- /dev/null
+/*
+ * Qualcomm Wireless Connectivity Subsystem Iris driver
+ *
+ * Copyright (C) 2016 Linaro Ltd
+ * Copyright (C) 2014 Sony Mobile Communications AB
+ * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/clk.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+
+#include "qcom_wcnss.h"
+
+struct qcom_iris {
+ struct device *dev;
+
+ struct clk *xo_clk;
+
+ struct regulator_bulk_data *vregs;
+ size_t num_vregs;
+};
+
+struct iris_data {
+ const struct wcnss_vreg_info *vregs;
+ size_t num_vregs;
+
+ bool use_48mhz_xo;
+};
+
+static const struct iris_data wcn3620_data = {
+ .vregs = (struct wcnss_vreg_info[]) {
+ { "vddxo", 1800000, 1800000, 10000 },
+ { "vddrfa", 1300000, 1300000, 100000 },
+ { "vddpa", 3300000, 3300000, 515000 },
+ { "vdddig", 1800000, 1800000, 10000 },
+ },
+ .num_vregs = 4,
+ .use_48mhz_xo = false,
+};
+
+static const struct iris_data wcn3660_data = {
+ .vregs = (struct wcnss_vreg_info[]) {
+ { "vddxo", 1800000, 1800000, 10000 },
+ { "vddrfa", 1300000, 1300000, 100000 },
+ { "vddpa", 2900000, 3000000, 515000 },
+ { "vdddig", 1200000, 1225000, 10000 },
+ },
+ .num_vregs = 4,
+ .use_48mhz_xo = true,
+};
+
+static const struct iris_data wcn3680_data = {
+ .vregs = (struct wcnss_vreg_info[]) {
+ { "vddxo", 1800000, 1800000, 10000 },
+ { "vddrfa", 1300000, 1300000, 100000 },
+ { "vddpa", 3300000, 3300000, 515000 },
+ { "vdddig", 1800000, 1800000, 10000 },
+ },
+ .num_vregs = 4,
+ .use_48mhz_xo = true,
+};
+
+int qcom_iris_enable(struct qcom_iris *iris)
+{
+ int ret;
+
+ ret = regulator_bulk_enable(iris->num_vregs, iris->vregs);
+ if (ret)
+ return ret;
+
+ ret = clk_prepare_enable(iris->xo_clk);
+ if (ret) {
+ dev_err(iris->dev, "failed to enable xo clk\n");
+ goto disable_regulators;
+ }
+
+ return 0;
+
+disable_regulators:
+ regulator_bulk_disable(iris->num_vregs, iris->vregs);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(qcom_iris_enable);
+
+void qcom_iris_disable(struct qcom_iris *iris)
+{
+ clk_disable_unprepare(iris->xo_clk);
+ regulator_bulk_disable(iris->num_vregs, iris->vregs);
+}
+EXPORT_SYMBOL_GPL(qcom_iris_disable);
+
+static int qcom_iris_probe(struct platform_device *pdev)
+{
+ const struct iris_data *data;
+ struct qcom_wcnss *wcnss;
+ struct qcom_iris *iris;
+ int ret;
+ int i;
+
+ iris = devm_kzalloc(&pdev->dev, sizeof(struct qcom_iris), GFP_KERNEL);
+ if (!iris)
+ return -ENOMEM;
+
+ data = of_device_get_match_data(&pdev->dev);
+ wcnss = dev_get_drvdata(pdev->dev.parent);
+
+ iris->xo_clk = devm_clk_get(&pdev->dev, "xo");
+ if (IS_ERR(iris->xo_clk)) {
+ if (PTR_ERR(iris->xo_clk) != -EPROBE_DEFER)
+ dev_err(&pdev->dev, "failed to acquire xo clk\n");
+ return PTR_ERR(iris->xo_clk);
+ }
+
+ iris->num_vregs = data->num_vregs;
+ iris->vregs = devm_kcalloc(&pdev->dev,
+ iris->num_vregs,
+ sizeof(struct regulator_bulk_data),
+ GFP_KERNEL);
+ if (!iris->vregs)
+ return -ENOMEM;
+
+ for (i = 0; i < iris->num_vregs; i++)
+ iris->vregs[i].supply = data->vregs[i].name;
+
+ ret = devm_regulator_bulk_get(&pdev->dev, iris->num_vregs, iris->vregs);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to get regulators\n");
+ return ret;
+ }
+
+ for (i = 0; i < iris->num_vregs; i++) {
+ if (data->vregs[i].max_voltage)
+ regulator_set_voltage(iris->vregs[i].consumer,
+ data->vregs[i].min_voltage,
+ data->vregs[i].max_voltage);
+
+ if (data->vregs[i].load_uA)
+ regulator_set_load(iris->vregs[i].consumer,
+ data->vregs[i].load_uA);
+ }
+
+ qcom_wcnss_assign_iris(wcnss, iris, data->use_48mhz_xo);
+
+ return 0;
+}
+
+static int qcom_iris_remove(struct platform_device *pdev)
+{
+ struct qcom_wcnss *wcnss = dev_get_drvdata(pdev->dev.parent);
+
+ qcom_wcnss_assign_iris(wcnss, NULL, false);
+
+ return 0;
+}
+
+static const struct of_device_id iris_of_match[] = {
+ { .compatible = "qcom,wcn3620", .data = &wcn3620_data },
+ { .compatible = "qcom,wcn3660", .data = &wcn3660_data },
+ { .compatible = "qcom,wcn3680", .data = &wcn3680_data },
+ {}
+};
+
+static struct platform_driver wcnss_driver = {
+ .probe = qcom_iris_probe,
+ .remove = qcom_iris_remove,
+ .driver = {
+ .name = "qcom-iris",
+ .of_match_table = iris_of_match,
+ },
+};
+
+module_platform_driver(wcnss_driver);
+MODULE_DESCRIPTION("Qualcomm Wireless Subsystem Iris driver");
+MODULE_LICENSE("GPL v2");
* will try to access an unmapped device address.
*/
static int rproc_iommu_fault(struct iommu_domain *domain, struct device *dev,
- unsigned long iova, int flags, void *token)
+ unsigned long iova, int flags, void *token)
{
struct rproc *rproc = token;
}
notifyid = ret;
- dev_dbg(dev, "vring%d: va %p dma %llx size %x idr %d\n", i, va,
- (unsigned long long)dma, size, notifyid);
+ dev_dbg(dev, "vring%d: va %p dma %pad size 0x%x idr %d\n",
+ i, va, &dma, size, notifyid);
rvring->va = va;
rvring->dma = dma;
struct fw_rsc_vdev_vring *vring = &rsc->vring[i];
struct rproc_vring *rvring = &rvdev->vring[i];
- dev_dbg(dev, "vdev rsc: vring%d: da %x, qsz %d, align %d\n",
- i, vring->da, vring->num, vring->align);
-
- /* make sure reserved bytes are zeroes */
- if (vring->reserved) {
- dev_err(dev, "vring rsc has non zero reserved bytes\n");
- return -EINVAL;
- }
+ dev_dbg(dev, "vdev rsc: vring%d: da 0x%x, qsz %d, align %d\n",
+ i, vring->da, vring->num, vring->align);
/* verify queue size and vring alignment are sane */
if (!vring->num || !vring->align) {
dev_err(dev, "invalid qsz (%d) or alignment (%d)\n",
- vring->num, vring->align);
+ vring->num, vring->align);
return -EINVAL;
}
* Returns 0 on success, or an appropriate error code otherwise
*/
static int rproc_handle_vdev(struct rproc *rproc, struct fw_rsc_vdev *rsc,
- int offset, int avail)
+ int offset, int avail)
{
struct device *dev = &rproc->dev;
struct rproc_vdev *rvdev;
return -EINVAL;
}
- dev_dbg(dev, "vdev rsc: id %d, dfeatures %x, cfg len %d, %d vrings\n",
+ dev_dbg(dev, "vdev rsc: id %d, dfeatures 0x%x, cfg len %d, %d vrings\n",
rsc->id, rsc->dfeatures, rsc->config_len, rsc->num_of_vrings);
/* we currently support only two vrings per rvdev */
return -EINVAL;
}
- rvdev = kzalloc(sizeof(struct rproc_vdev), GFP_KERNEL);
+ rvdev = kzalloc(sizeof(*rvdev), GFP_KERNEL);
if (!rvdev)
return -ENOMEM;
* Returns 0 on success, or an appropriate error code otherwise
*/
static int rproc_handle_trace(struct rproc *rproc, struct fw_rsc_trace *rsc,
- int offset, int avail)
+ int offset, int avail)
{
struct rproc_mem_entry *trace;
struct device *dev = &rproc->dev;
rproc->num_traces++;
- dev_dbg(dev, "%s added: va %p, da 0x%x, len 0x%x\n", name, ptr,
- rsc->da, rsc->len);
+ dev_dbg(dev, "%s added: va %p, da 0x%x, len 0x%x\n",
+ name, ptr, rsc->da, rsc->len);
return 0;
}
* are outside those ranges.
*/
static int rproc_handle_devmem(struct rproc *rproc, struct fw_rsc_devmem *rsc,
- int offset, int avail)
+ int offset, int avail)
{
struct rproc_mem_entry *mapping;
struct device *dev = &rproc->dev;
list_add_tail(&mapping->node, &rproc->mappings);
dev_dbg(dev, "mapped devmem pa 0x%x, da 0x%x, len 0x%x\n",
- rsc->pa, rsc->da, rsc->len);
+ rsc->pa, rsc->da, rsc->len);
return 0;
* 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 offset, int avail)
-
+ struct fw_rsc_carveout *rsc,
+ int offset, int avail)
{
struct rproc_mem_entry *carveout, *mapping;
struct device *dev = &rproc->dev;
return -EINVAL;
}
- dev_dbg(dev, "carveout rsc: da %x, pa %x, len %x, flags %x\n",
- rsc->da, rsc->pa, rsc->len, rsc->flags);
+ dev_dbg(dev, "carveout rsc: name: %s, da 0x%x, pa 0x%x, len 0x%x, flags 0x%x\n",
+ rsc->name, rsc->da, rsc->pa, rsc->len, rsc->flags);
carveout = kzalloc(sizeof(*carveout), GFP_KERNEL);
if (!carveout)
va = dma_alloc_coherent(dev->parent, rsc->len, &dma, GFP_KERNEL);
if (!va) {
- dev_err(dev->parent, "dma_alloc_coherent err: %d\n", rsc->len);
+ dev_err(dev->parent,
+ "failed to allocate dma memory: len 0x%x\n", rsc->len);
ret = -ENOMEM;
goto free_carv;
}
- dev_dbg(dev, "carveout va %p, dma %llx, len 0x%x\n", va,
- (unsigned long long)dma, rsc->len);
+ dev_dbg(dev, "carveout va %p, dma %pad, len 0x%x\n",
+ va, &dma, rsc->len);
/*
* Ok, this is non-standard.
if (rproc->domain) {
mapping = kzalloc(sizeof(*mapping), GFP_KERNEL);
if (!mapping) {
- dev_err(dev, "kzalloc mapping failed\n");
ret = -ENOMEM;
goto dma_free;
}
ret = iommu_map(rproc->domain, rsc->da, dma, rsc->len,
- rsc->flags);
+ rsc->flags);
if (ret) {
dev_err(dev, "iommu_map failed: %d\n", ret);
goto free_mapping;
mapping->len = rsc->len;
list_add_tail(&mapping->node, &rproc->mappings);
- dev_dbg(dev, "carveout mapped 0x%x to 0x%llx\n",
- rsc->da, (unsigned long long)dma);
+ dev_dbg(dev, "carveout mapped 0x%x to %pad\n",
+ rsc->da, &dma);
}
/*
[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 */
+ [RSC_VDEV] = (rproc_handle_resource_t)rproc_count_vrings,
};
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_resources(struct rproc *rproc, int len,
rproc_handle_resource_t handlers[RSC_LAST])
static void rproc_resource_cleanup(struct rproc *rproc)
{
struct rproc_mem_entry *entry, *tmp;
+ struct rproc_vdev *rvdev, *rvtmp;
struct device *dev = &rproc->dev;
/* clean up debugfs trace entries */
if (unmapped != entry->len) {
/* nothing much to do besides complaining */
dev_err(dev, "failed to unmap %u/%zu\n", entry->len,
- unmapped);
+ unmapped);
}
list_del(&entry->node);
list_del(&entry->node);
kfree(entry);
}
+
+ /* clean up remote vdev entries */
+ list_for_each_entry_safe(rvdev, rvtmp, &rproc->rvdevs, node)
+ rproc_remove_virtio_dev(rvdev);
}
/*
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");
+ /*
+ * 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 device memory.
+ */
+ rproc->cached_table = kmemdup(table, tablesz, GFP_KERNEL);
+ if (!rproc->cached_table)
+ goto clean_up;
+
+ rproc->table_ptr = rproc->cached_table;
+
+ /* reset max_notifyid */
+ rproc->max_notifyid = -1;
+
+ /* look for virtio devices and register them */
+ ret = rproc_handle_resources(rproc, tablesz, rproc_vdev_handler);
+ if (ret) {
+ dev_err(dev, "Failed to handle vdev resources: %d\n", ret);
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.
+ * In order to pass this information to the remote device we must copy
+ * this information to device memory. We also update the table_ptr so
+ * that any subsequent changes will be applied to the loaded version.
*/
loaded_table = rproc_find_loaded_rsc_table(rproc, fw);
- if (loaded_table)
+ if (loaded_table) {
memcpy(loaded_table, rproc->cached_table, tablesz);
+ rproc->table_ptr = loaded_table;
+ }
/* power up the remote processor */
ret = rproc->ops->start(rproc);
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);
return 0;
clean_up:
+ kfree(rproc->cached_table);
+ rproc->cached_table = NULL;
+ rproc->table_ptr = NULL;
+
rproc_resource_cleanup(rproc);
rproc_disable_iommu(rproc);
return ret;
static void rproc_fw_config_virtio(const struct firmware *fw, void *context)
{
struct rproc *rproc = context;
- struct resource_table *table;
- int ret, tablesz;
- if (rproc_fw_sanity_check(rproc, fw) < 0)
- goto out;
+ /* if rproc is marked always-on, request it to boot */
+ if (rproc->auto_boot)
+ rproc_boot_nowait(rproc);
- /* look for the resource table */
- table = rproc_find_rsc_table(rproc, fw, &tablesz);
- if (!table)
- goto out;
-
- 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 = kmemdup(table, tablesz, GFP_KERNEL);
- if (!rproc->cached_table)
- goto out;
-
- 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 */
complete_all(&rproc->firmware_loading_complete);
* rproc_trigger_recovery() - recover a remoteproc
* @rproc: the remote processor
*
- * The recovery is done by reseting all the virtio devices, that way all the
+ * The recovery is done by resetting all the virtio devices, that way all the
* rpmsg drivers will be reseted along with the remote processor making the
* remoteproc functional again.
*
*/
int rproc_trigger_recovery(struct rproc *rproc)
{
- struct rproc_vdev *rvdev, *rvtmp;
-
dev_err(&rproc->dev, "recovering %s\n", rproc->name);
init_completion(&rproc->crash_comp);
- /* clean up remote vdev entries */
- list_for_each_entry_safe(rvdev, rvtmp, &rproc->rvdevs, node)
- rproc_remove_virtio_dev(rvdev);
+ /* shut down the remote */
+ /* TODO: make sure this works with rproc->power > 1 */
+ rproc_shutdown(rproc);
/* 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);
+ /*
+ * boot the remote processor up again
+ */
+ rproc_boot(rproc);
- return rproc_add_virtio_devices(rproc);
+ return 0;
}
/**
rproc_disable_iommu(rproc);
- /* Give the next start a clean resource table */
- rproc->table_ptr = rproc->cached_table;
+ /* Free the copy of the resource table */
+ kfree(rproc->cached_table);
+ rproc->cached_table = NULL;
+ rproc->table_ptr = NULL;
/* if in crash state, unlock crash handler */
if (rproc->state == RPROC_CRASHED)
* yet. Instead, when you need to unroll rproc_alloc(), use rproc_put().
*/
struct rproc *rproc_alloc(struct device *dev, const char *name,
- const struct rproc_ops *ops,
- const char *firmware, int len)
+ const struct rproc_ops *ops,
+ const char *firmware, int len)
{
struct rproc *rproc;
char *p, *template = "rproc-%s-fw";
*/
name_len = strlen(name) + strlen(template) - 2 + 1;
- rproc = kzalloc(sizeof(struct rproc) + len + name_len, GFP_KERNEL);
+ rproc = kzalloc(sizeof(*rproc) + len + name_len, GFP_KERNEL);
if (!rproc)
return NULL;
rproc->name = name;
rproc->ops = ops;
rproc->priv = &rproc[1];
+ rproc->auto_boot = true;
device_initialize(&rproc->dev);
rproc->dev.parent = dev;
/* if rproc is just being registered, wait */
wait_for_completion(&rproc->firmware_loading_complete);
+ /* if rproc is marked always-on, rproc_add() booted it */
+ /* TODO: make sure this works with rproc->power > 1 */
+ if (rproc->auto_boot)
+ rproc_shutdown(rproc);
+
/* clean up remote vdev entries */
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);
-
/* the rproc is downref'ed as soon as it's removed from the klist */
mutex_lock(&rproc_list_mutex);
list_del(&rproc->node);
* as it provides very early tracing with little to no dependencies at all.
*/
static ssize_t rproc_trace_read(struct file *filp, char __user *userbuf,
- size_t count, loff_t *ppos)
+ size_t count, loff_t *ppos)
{
struct rproc_mem_entry *trace = filp->private_data;
int len = strnlen(trace->va, trace->len);
/* expose the state of the remote processor via debugfs */
static ssize_t rproc_state_read(struct file *filp, char __user *userbuf,
- size_t count, loff_t *ppos)
+ size_t count, loff_t *ppos)
{
struct rproc *rproc = filp->private_data;
unsigned int state;
state = rproc->state > RPROC_LAST ? RPROC_LAST : rproc->state;
i = scnprintf(buf, 30, "%.28s (%d)\n", rproc_state_string[state],
- rproc->state);
+ rproc->state);
return simple_read_from_buffer(userbuf, count, ppos, buf, i);
}
/* expose the name of the remote processor via debugfs */
static ssize_t rproc_name_read(struct file *filp, char __user *userbuf,
- size_t count, loff_t *ppos)
+ size_t count, loff_t *ppos)
{
struct rproc *rproc = filp->private_data;
/* need room for the name, a newline and a terminating null */
}
struct dentry *rproc_create_trace_file(const char *name, struct rproc *rproc,
- struct rproc_mem_entry *trace)
+ struct rproc_mem_entry *trace)
{
struct dentry *tfile;
- tfile = debugfs_create_file(name, 0400, rproc->dbg_dir,
- trace, &trace_rproc_ops);
+ tfile = debugfs_create_file(name, 0400, rproc->dbg_dir, trace,
+ &trace_rproc_ops);
if (!tfile) {
dev_err(&rproc->dev, "failed to create debugfs trace entry\n");
return NULL;
return;
debugfs_create_file("name", 0400, rproc->dbg_dir,
- rproc, &rproc_name_ops);
+ rproc, &rproc_name_ops);
debugfs_create_file("state", 0400, rproc->dbg_dir,
- rproc, &rproc_state_ops);
+ rproc, &rproc_state_ops);
debugfs_create_file("recovery", 0400, rproc->dbg_dir,
- rproc, &rproc_recovery_ops);
+ rproc, &rproc_recovery_ops);
}
void __init rproc_init_debugfs(void)
continue;
dev_dbg(dev, "phdr: type %d da 0x%x memsz 0x%x filesz 0x%x\n",
- phdr->p_type, da, memsz, filesz);
+ phdr->p_type, da, memsz, filesz);
if (filesz > memsz) {
dev_err(dev, "bad phdr filesz 0x%x memsz 0x%x\n",
- filesz, memsz);
+ filesz, memsz);
ret = -EINVAL;
break;
}
if (offset + filesz > fw->size) {
dev_err(dev, "truncated fw: need 0x%x avail 0x%zx\n",
- offset + filesz, fw->size);
+ offset + filesz, fw->size);
ret = -EINVAL;
break;
}
*/
struct rproc_fw_ops {
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);
+ 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);
/* from remoteproc_debugfs.c */
void rproc_remove_trace_file(struct dentry *tfile);
struct dentry *rproc_create_trace_file(const char *name, struct rproc *rproc,
- struct rproc_mem_entry *trace);
+ struct rproc_mem_entry *trace);
void rproc_delete_debug_dir(struct rproc *rproc);
void rproc_create_debug_dir(struct rproc *rproc);
void rproc_init_debugfs(void);
static inline
struct resource_table *rproc_find_rsc_table(struct rproc *rproc,
- const struct firmware *fw, int *tablesz)
+ const struct firmware *fw,
+ int *tablesz)
{
if (rproc->fw_ops->find_rsc_table)
return rproc->fw_ops->find_rsc_table(rproc, fw, tablesz);
static inline
struct resource_table *rproc_find_loaded_rsc_table(struct rproc *rproc,
- const struct firmware *fw)
+ const struct firmware *fw)
{
if (rproc->fw_ops->find_loaded_rsc_table)
return rproc->fw_ops->find_loaded_rsc_table(rproc, fw);
EXPORT_SYMBOL(rproc_vq_interrupt);
static struct virtqueue *rp_find_vq(struct virtio_device *vdev,
- unsigned id,
+ unsigned int id,
void (*callback)(struct virtqueue *vq),
const char *name)
{
memset(addr, 0, size);
dev_dbg(dev, "vring%d: va %p qsz %d notifyid %d\n",
- id, addr, len, rvring->notifyid);
+ id, addr, len, rvring->notifyid);
/*
* Create the new vq, and tell virtio we're not interested in
* the 'weak' smp barriers, since we're talking with a real device.
*/
vq = vring_new_virtqueue(id, len, rvring->align, vdev, false, addr,
- rproc_virtio_notify, callback, name);
+ rproc_virtio_notify, callback, name);
if (!vq) {
dev_err(dev, "vring_new_virtqueue %s failed\n", name);
rproc_free_vring(rvring);
static void rproc_virtio_del_vqs(struct virtio_device *vdev)
{
- struct rproc *rproc = vdev_to_rproc(vdev);
-
- /* power down the remote processor before deleting vqs */
- rproc_shutdown(rproc);
-
__rproc_virtio_del_vqs(vdev);
}
-static int rproc_virtio_find_vqs(struct virtio_device *vdev, unsigned nvqs,
- struct virtqueue *vqs[],
- vq_callback_t *callbacks[],
- const char * const names[])
+static int rproc_virtio_find_vqs(struct virtio_device *vdev, unsigned int nvqs,
+ struct virtqueue *vqs[],
+ vq_callback_t *callbacks[],
+ const char * const names[])
{
- struct rproc *rproc = vdev_to_rproc(vdev);
int i, ret;
for (i = 0; i < nvqs; ++i) {
}
}
- /* now that the vqs are all set, boot the remote processor */
- ret = rproc_boot_nowait(rproc);
- if (ret) {
- dev_err(&rproc->dev, "rproc_boot() failed %d\n", ret);
- goto error;
- }
-
return 0;
error:
return 0;
}
-static void rproc_virtio_get(struct virtio_device *vdev, unsigned offset,
- void *buf, unsigned len)
+static void rproc_virtio_get(struct virtio_device *vdev, unsigned int offset,
+ void *buf, unsigned int len)
{
struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
struct fw_rsc_vdev *rsc;
memcpy(buf, cfg + offset, len);
}
-static void rproc_virtio_set(struct virtio_device *vdev, unsigned offset,
- const void *buf, unsigned len)
+static void rproc_virtio_set(struct virtio_device *vdev, unsigned int offset,
+ const void *buf, unsigned int len)
{
struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
struct fw_rsc_vdev *rsc;
goto err;
}
+ rproc->auto_boot = false;
+
wkupm3 = rproc->priv;
wkupm3->rproc = rproc;
wkupm3->pdev = pdev;
# RPMSG always gets selected by whoever wants it
config RPMSG
tristate
+
+config RPMSG_QCOM_SMD
+ tristate "Qualcomm Shared Memory Driver (SMD)"
+ depends on QCOM_SMEM
+ depends on QCOM_SMD=n
+ select RPMSG
+ help
+ Say y here to enable support for the Qualcomm Shared Memory Driver
+ providing communication channels to remote processors in Qualcomm
+ platforms.
+
+config RPMSG_VIRTIO
+ tristate
+ select RPMSG
select VIRTIO
select VIRTUALIZATION
-obj-$(CONFIG_RPMSG) += virtio_rpmsg_bus.o
+obj-$(CONFIG_RPMSG) += rpmsg_core.o
+obj-$(CONFIG_RPMSG_QCOM_SMD) += qcom_smd.o
+obj-$(CONFIG_RPMSG_VIRTIO) += virtio_rpmsg_bus.o
--- /dev/null
+/*
+ * Copyright (c) 2015, Sony Mobile Communications AB.
+ * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/soc/qcom/smem.h>
+#include <linux/wait.h>
+#include <linux/rpmsg.h>
+
+#include "rpmsg_internal.h"
+
+/*
+ * The Qualcomm Shared Memory communication solution provides point-to-point
+ * channels for clients to send and receive streaming or packet based data.
+ *
+ * Each channel consists of a control item (channel info) and a ring buffer
+ * pair. The channel info carry information related to channel state, flow
+ * control and the offsets within the ring buffer.
+ *
+ * All allocated channels are listed in an allocation table, identifying the
+ * pair of items by name, type and remote processor.
+ *
+ * Upon creating a new channel the remote processor allocates channel info and
+ * ring buffer items from the smem heap and populate the allocation table. An
+ * interrupt is sent to the other end of the channel and a scan for new
+ * channels should be done. A channel never goes away, it will only change
+ * state.
+ *
+ * The remote processor signals it intent for bring up the communication
+ * channel by setting the state of its end of the channel to "opening" and
+ * sends out an interrupt. We detect this change and register a smd device to
+ * consume the channel. Upon finding a consumer we finish the handshake and the
+ * channel is up.
+ *
+ * Upon closing a channel, the remote processor will update the state of its
+ * end of the channel and signal us, we will then unregister any attached
+ * device and close our end of the channel.
+ *
+ * Devices attached to a channel can use the qcom_smd_send function to push
+ * data to the channel, this is done by copying the data into the tx ring
+ * buffer, updating the pointers in the channel info and signaling the remote
+ * processor.
+ *
+ * The remote processor does the equivalent when it transfer data and upon
+ * receiving the interrupt we check the channel info for new data and delivers
+ * this to the attached device. If the device is not ready to receive the data
+ * we leave it in the ring buffer for now.
+ */
+
+struct smd_channel_info;
+struct smd_channel_info_pair;
+struct smd_channel_info_word;
+struct smd_channel_info_word_pair;
+
+static const struct rpmsg_endpoint_ops qcom_smd_endpoint_ops;
+
+#define SMD_ALLOC_TBL_COUNT 2
+#define SMD_ALLOC_TBL_SIZE 64
+
+/*
+ * This lists the various smem heap items relevant for the allocation table and
+ * smd channel entries.
+ */
+static const struct {
+ unsigned alloc_tbl_id;
+ unsigned info_base_id;
+ unsigned fifo_base_id;
+} smem_items[SMD_ALLOC_TBL_COUNT] = {
+ {
+ .alloc_tbl_id = 13,
+ .info_base_id = 14,
+ .fifo_base_id = 338
+ },
+ {
+ .alloc_tbl_id = 266,
+ .info_base_id = 138,
+ .fifo_base_id = 202,
+ },
+};
+
+/**
+ * struct qcom_smd_edge - representing a remote processor
+ * @of_node: of_node handle for information related to this edge
+ * @edge_id: identifier of this edge
+ * @remote_pid: identifier of remote processor
+ * @irq: interrupt for signals on this edge
+ * @ipc_regmap: regmap handle holding the outgoing ipc register
+ * @ipc_offset: offset within @ipc_regmap of the register for ipc
+ * @ipc_bit: bit in the register at @ipc_offset of @ipc_regmap
+ * @channels: list of all channels detected on this edge
+ * @channels_lock: guard for modifications of @channels
+ * @allocated: array of bitmaps representing already allocated channels
+ * @smem_available: last available amount of smem triggering a channel scan
+ * @scan_work: work item for discovering new channels
+ * @state_work: work item for edge state changes
+ */
+struct qcom_smd_edge {
+ struct device dev;
+
+ struct device_node *of_node;
+ unsigned edge_id;
+ unsigned remote_pid;
+
+ int irq;
+
+ struct regmap *ipc_regmap;
+ int ipc_offset;
+ int ipc_bit;
+
+ struct list_head channels;
+ spinlock_t channels_lock;
+
+ DECLARE_BITMAP(allocated[SMD_ALLOC_TBL_COUNT], SMD_ALLOC_TBL_SIZE);
+
+ unsigned smem_available;
+
+ wait_queue_head_t new_channel_event;
+
+ struct work_struct scan_work;
+ struct work_struct state_work;
+};
+
+/*
+ * SMD channel states.
+ */
+enum smd_channel_state {
+ SMD_CHANNEL_CLOSED,
+ SMD_CHANNEL_OPENING,
+ SMD_CHANNEL_OPENED,
+ SMD_CHANNEL_FLUSHING,
+ SMD_CHANNEL_CLOSING,
+ SMD_CHANNEL_RESET,
+ SMD_CHANNEL_RESET_OPENING
+};
+
+struct qcom_smd_device {
+ struct rpmsg_device rpdev;
+
+ struct qcom_smd_edge *edge;
+};
+
+struct qcom_smd_endpoint {
+ struct rpmsg_endpoint ept;
+
+ struct qcom_smd_channel *qsch;
+};
+
+#define to_smd_device(_rpdev) container_of(_rpdev, struct qcom_smd_device, rpdev)
+#define to_smd_edge(d) container_of(d, struct qcom_smd_edge, dev)
+#define to_smd_endpoint(ept) container_of(ept, struct qcom_smd_endpoint, ept)
+
+/**
+ * struct qcom_smd_channel - smd channel struct
+ * @edge: qcom_smd_edge this channel is living on
+ * @qsdev: reference to a associated smd client device
+ * @name: name of the channel
+ * @state: local state of the channel
+ * @remote_state: remote state of the channel
+ * @info: byte aligned outgoing/incoming channel info
+ * @info_word: word aligned outgoing/incoming channel info
+ * @tx_lock: lock to make writes to the channel mutually exclusive
+ * @fblockread_event: wakeup event tied to tx fBLOCKREADINTR
+ * @tx_fifo: pointer to the outgoing ring buffer
+ * @rx_fifo: pointer to the incoming ring buffer
+ * @fifo_size: size of each ring buffer
+ * @bounce_buffer: bounce buffer for reading wrapped packets
+ * @cb: callback function registered for this channel
+ * @recv_lock: guard for rx info modifications and cb pointer
+ * @pkt_size: size of the currently handled packet
+ * @list: lite entry for @channels in qcom_smd_edge
+ */
+struct qcom_smd_channel {
+ struct qcom_smd_edge *edge;
+
+ struct qcom_smd_endpoint *qsept;
+ bool registered;
+
+ char *name;
+ enum smd_channel_state state;
+ enum smd_channel_state remote_state;
+
+ struct smd_channel_info_pair *info;
+ struct smd_channel_info_word_pair *info_word;
+
+ struct mutex tx_lock;
+ wait_queue_head_t fblockread_event;
+
+ void *tx_fifo;
+ void *rx_fifo;
+ int fifo_size;
+
+ void *bounce_buffer;
+
+ spinlock_t recv_lock;
+
+ int pkt_size;
+
+ void *drvdata;
+
+ struct list_head list;
+};
+
+/*
+ * Format of the smd_info smem items, for byte aligned channels.
+ */
+struct smd_channel_info {
+ __le32 state;
+ u8 fDSR;
+ u8 fCTS;
+ u8 fCD;
+ u8 fRI;
+ u8 fHEAD;
+ u8 fTAIL;
+ u8 fSTATE;
+ u8 fBLOCKREADINTR;
+ __le32 tail;
+ __le32 head;
+};
+
+struct smd_channel_info_pair {
+ struct smd_channel_info tx;
+ struct smd_channel_info rx;
+};
+
+/*
+ * Format of the smd_info smem items, for word aligned channels.
+ */
+struct smd_channel_info_word {
+ __le32 state;
+ __le32 fDSR;
+ __le32 fCTS;
+ __le32 fCD;
+ __le32 fRI;
+ __le32 fHEAD;
+ __le32 fTAIL;
+ __le32 fSTATE;
+ __le32 fBLOCKREADINTR;
+ __le32 tail;
+ __le32 head;
+};
+
+struct smd_channel_info_word_pair {
+ struct smd_channel_info_word tx;
+ struct smd_channel_info_word rx;
+};
+
+#define GET_RX_CHANNEL_FLAG(channel, param) \
+ ({ \
+ BUILD_BUG_ON(sizeof(channel->info->rx.param) != sizeof(u8)); \
+ channel->info_word ? \
+ le32_to_cpu(channel->info_word->rx.param) : \
+ channel->info->rx.param; \
+ })
+
+#define GET_RX_CHANNEL_INFO(channel, param) \
+ ({ \
+ BUILD_BUG_ON(sizeof(channel->info->rx.param) != sizeof(u32)); \
+ le32_to_cpu(channel->info_word ? \
+ channel->info_word->rx.param : \
+ channel->info->rx.param); \
+ })
+
+#define SET_RX_CHANNEL_FLAG(channel, param, value) \
+ ({ \
+ BUILD_BUG_ON(sizeof(channel->info->rx.param) != sizeof(u8)); \
+ if (channel->info_word) \
+ channel->info_word->rx.param = cpu_to_le32(value); \
+ else \
+ channel->info->rx.param = value; \
+ })
+
+#define SET_RX_CHANNEL_INFO(channel, param, value) \
+ ({ \
+ BUILD_BUG_ON(sizeof(channel->info->rx.param) != sizeof(u32)); \
+ if (channel->info_word) \
+ channel->info_word->rx.param = cpu_to_le32(value); \
+ else \
+ channel->info->rx.param = cpu_to_le32(value); \
+ })
+
+#define GET_TX_CHANNEL_FLAG(channel, param) \
+ ({ \
+ BUILD_BUG_ON(sizeof(channel->info->tx.param) != sizeof(u8)); \
+ channel->info_word ? \
+ le32_to_cpu(channel->info_word->tx.param) : \
+ channel->info->tx.param; \
+ })
+
+#define GET_TX_CHANNEL_INFO(channel, param) \
+ ({ \
+ BUILD_BUG_ON(sizeof(channel->info->tx.param) != sizeof(u32)); \
+ le32_to_cpu(channel->info_word ? \
+ channel->info_word->tx.param : \
+ channel->info->tx.param); \
+ })
+
+#define SET_TX_CHANNEL_FLAG(channel, param, value) \
+ ({ \
+ BUILD_BUG_ON(sizeof(channel->info->tx.param) != sizeof(u8)); \
+ if (channel->info_word) \
+ channel->info_word->tx.param = cpu_to_le32(value); \
+ else \
+ channel->info->tx.param = value; \
+ })
+
+#define SET_TX_CHANNEL_INFO(channel, param, value) \
+ ({ \
+ BUILD_BUG_ON(sizeof(channel->info->tx.param) != sizeof(u32)); \
+ if (channel->info_word) \
+ channel->info_word->tx.param = cpu_to_le32(value); \
+ else \
+ channel->info->tx.param = cpu_to_le32(value); \
+ })
+
+/**
+ * struct qcom_smd_alloc_entry - channel allocation entry
+ * @name: channel name
+ * @cid: channel index
+ * @flags: channel flags and edge id
+ * @ref_count: reference count of the channel
+ */
+struct qcom_smd_alloc_entry {
+ u8 name[20];
+ __le32 cid;
+ __le32 flags;
+ __le32 ref_count;
+} __packed;
+
+#define SMD_CHANNEL_FLAGS_EDGE_MASK 0xff
+#define SMD_CHANNEL_FLAGS_STREAM BIT(8)
+#define SMD_CHANNEL_FLAGS_PACKET BIT(9)
+
+/*
+ * Each smd packet contains a 20 byte header, with the first 4 being the length
+ * of the packet.
+ */
+#define SMD_PACKET_HEADER_LEN 20
+
+/*
+ * Signal the remote processor associated with 'channel'.
+ */
+static void qcom_smd_signal_channel(struct qcom_smd_channel *channel)
+{
+ struct qcom_smd_edge *edge = channel->edge;
+
+ regmap_write(edge->ipc_regmap, edge->ipc_offset, BIT(edge->ipc_bit));
+}
+
+/*
+ * Initialize the tx channel info
+ */
+static void qcom_smd_channel_reset(struct qcom_smd_channel *channel)
+{
+ SET_TX_CHANNEL_INFO(channel, state, SMD_CHANNEL_CLOSED);
+ SET_TX_CHANNEL_FLAG(channel, fDSR, 0);
+ SET_TX_CHANNEL_FLAG(channel, fCTS, 0);
+ SET_TX_CHANNEL_FLAG(channel, fCD, 0);
+ SET_TX_CHANNEL_FLAG(channel, fRI, 0);
+ SET_TX_CHANNEL_FLAG(channel, fHEAD, 0);
+ SET_TX_CHANNEL_FLAG(channel, fTAIL, 0);
+ SET_TX_CHANNEL_FLAG(channel, fSTATE, 1);
+ SET_TX_CHANNEL_FLAG(channel, fBLOCKREADINTR, 1);
+ SET_TX_CHANNEL_INFO(channel, head, 0);
+ SET_RX_CHANNEL_INFO(channel, tail, 0);
+
+ qcom_smd_signal_channel(channel);
+
+ channel->state = SMD_CHANNEL_CLOSED;
+ channel->pkt_size = 0;
+}
+
+/*
+ * Set the callback for a channel, with appropriate locking
+ */
+static void qcom_smd_channel_set_callback(struct qcom_smd_channel *channel,
+ rpmsg_rx_cb_t cb)
+{
+ struct rpmsg_endpoint *ept = &channel->qsept->ept;
+ unsigned long flags;
+
+ spin_lock_irqsave(&channel->recv_lock, flags);
+ ept->cb = cb;
+ spin_unlock_irqrestore(&channel->recv_lock, flags);
+};
+
+/*
+ * Calculate the amount of data available in the rx fifo
+ */
+static size_t qcom_smd_channel_get_rx_avail(struct qcom_smd_channel *channel)
+{
+ unsigned head;
+ unsigned tail;
+
+ head = GET_RX_CHANNEL_INFO(channel, head);
+ tail = GET_RX_CHANNEL_INFO(channel, tail);
+
+ return (head - tail) & (channel->fifo_size - 1);
+}
+
+/*
+ * Set tx channel state and inform the remote processor
+ */
+static void qcom_smd_channel_set_state(struct qcom_smd_channel *channel,
+ int state)
+{
+ struct qcom_smd_edge *edge = channel->edge;
+ bool is_open = state == SMD_CHANNEL_OPENED;
+
+ if (channel->state == state)
+ return;
+
+ dev_dbg(&edge->dev, "set_state(%s, %d)\n", channel->name, state);
+
+ SET_TX_CHANNEL_FLAG(channel, fDSR, is_open);
+ SET_TX_CHANNEL_FLAG(channel, fCTS, is_open);
+ SET_TX_CHANNEL_FLAG(channel, fCD, is_open);
+
+ SET_TX_CHANNEL_INFO(channel, state, state);
+ SET_TX_CHANNEL_FLAG(channel, fSTATE, 1);
+
+ channel->state = state;
+ qcom_smd_signal_channel(channel);
+}
+
+/*
+ * Copy count bytes of data using 32bit accesses, if that's required.
+ */
+static void smd_copy_to_fifo(void __iomem *dst,
+ const void *src,
+ size_t count,
+ bool word_aligned)
+{
+ if (word_aligned) {
+ __iowrite32_copy(dst, src, count / sizeof(u32));
+ } else {
+ memcpy_toio(dst, src, count);
+ }
+}
+
+/*
+ * Copy count bytes of data using 32bit accesses, if that is required.
+ */
+static void smd_copy_from_fifo(void *dst,
+ const void __iomem *src,
+ size_t count,
+ bool word_aligned)
+{
+ if (word_aligned) {
+ __ioread32_copy(dst, src, count / sizeof(u32));
+ } else {
+ memcpy_fromio(dst, src, count);
+ }
+}
+
+/*
+ * Read count bytes of data from the rx fifo into buf, but don't advance the
+ * tail.
+ */
+static size_t qcom_smd_channel_peek(struct qcom_smd_channel *channel,
+ void *buf, size_t count)
+{
+ bool word_aligned;
+ unsigned tail;
+ size_t len;
+
+ word_aligned = channel->info_word;
+ tail = GET_RX_CHANNEL_INFO(channel, tail);
+
+ len = min_t(size_t, count, channel->fifo_size - tail);
+ if (len) {
+ smd_copy_from_fifo(buf,
+ channel->rx_fifo + tail,
+ len,
+ word_aligned);
+ }
+
+ if (len != count) {
+ smd_copy_from_fifo(buf + len,
+ channel->rx_fifo,
+ count - len,
+ word_aligned);
+ }
+
+ return count;
+}
+
+/*
+ * Advance the rx tail by count bytes.
+ */
+static void qcom_smd_channel_advance(struct qcom_smd_channel *channel,
+ size_t count)
+{
+ unsigned tail;
+
+ tail = GET_RX_CHANNEL_INFO(channel, tail);
+ tail += count;
+ tail &= (channel->fifo_size - 1);
+ SET_RX_CHANNEL_INFO(channel, tail, tail);
+}
+
+/*
+ * Read out a single packet from the rx fifo and deliver it to the device
+ */
+static int qcom_smd_channel_recv_single(struct qcom_smd_channel *channel)
+{
+ struct rpmsg_endpoint *ept = &channel->qsept->ept;
+ unsigned tail;
+ size_t len;
+ void *ptr;
+ int ret;
+
+ tail = GET_RX_CHANNEL_INFO(channel, tail);
+
+ /* Use bounce buffer if the data wraps */
+ if (tail + channel->pkt_size >= channel->fifo_size) {
+ ptr = channel->bounce_buffer;
+ len = qcom_smd_channel_peek(channel, ptr, channel->pkt_size);
+ } else {
+ ptr = channel->rx_fifo + tail;
+ len = channel->pkt_size;
+ }
+
+ ret = ept->cb(ept->rpdev, ptr, len, ept->priv, RPMSG_ADDR_ANY);
+ if (ret < 0)
+ return ret;
+
+ /* Only forward the tail if the client consumed the data */
+ qcom_smd_channel_advance(channel, len);
+
+ channel->pkt_size = 0;
+
+ return 0;
+}
+
+/*
+ * Per channel interrupt handling
+ */
+static bool qcom_smd_channel_intr(struct qcom_smd_channel *channel)
+{
+ bool need_state_scan = false;
+ int remote_state;
+ __le32 pktlen;
+ int avail;
+ int ret;
+
+ /* Handle state changes */
+ remote_state = GET_RX_CHANNEL_INFO(channel, state);
+ if (remote_state != channel->remote_state) {
+ channel->remote_state = remote_state;
+ need_state_scan = true;
+ }
+ /* Indicate that we have seen any state change */
+ SET_RX_CHANNEL_FLAG(channel, fSTATE, 0);
+
+ /* Signal waiting qcom_smd_send() about the interrupt */
+ if (!GET_TX_CHANNEL_FLAG(channel, fBLOCKREADINTR))
+ wake_up_interruptible(&channel->fblockread_event);
+
+ /* Don't consume any data until we've opened the channel */
+ if (channel->state != SMD_CHANNEL_OPENED)
+ goto out;
+
+ /* Indicate that we've seen the new data */
+ SET_RX_CHANNEL_FLAG(channel, fHEAD, 0);
+
+ /* Consume data */
+ for (;;) {
+ avail = qcom_smd_channel_get_rx_avail(channel);
+
+ if (!channel->pkt_size && avail >= SMD_PACKET_HEADER_LEN) {
+ qcom_smd_channel_peek(channel, &pktlen, sizeof(pktlen));
+ qcom_smd_channel_advance(channel, SMD_PACKET_HEADER_LEN);
+ channel->pkt_size = le32_to_cpu(pktlen);
+ } else if (channel->pkt_size && avail >= channel->pkt_size) {
+ ret = qcom_smd_channel_recv_single(channel);
+ if (ret)
+ break;
+ } else {
+ break;
+ }
+ }
+
+ /* Indicate that we have seen and updated tail */
+ SET_RX_CHANNEL_FLAG(channel, fTAIL, 1);
+
+ /* Signal the remote that we've consumed the data (if requested) */
+ if (!GET_RX_CHANNEL_FLAG(channel, fBLOCKREADINTR)) {
+ /* Ensure ordering of channel info updates */
+ wmb();
+
+ qcom_smd_signal_channel(channel);
+ }
+
+out:
+ return need_state_scan;
+}
+
+/*
+ * The edge interrupts are triggered by the remote processor on state changes,
+ * channel info updates or when new channels are created.
+ */
+static irqreturn_t qcom_smd_edge_intr(int irq, void *data)
+{
+ struct qcom_smd_edge *edge = data;
+ struct qcom_smd_channel *channel;
+ unsigned available;
+ bool kick_scanner = false;
+ bool kick_state = false;
+
+ /*
+ * Handle state changes or data on each of the channels on this edge
+ */
+ spin_lock(&edge->channels_lock);
+ list_for_each_entry(channel, &edge->channels, list) {
+ spin_lock(&channel->recv_lock);
+ kick_state |= qcom_smd_channel_intr(channel);
+ spin_unlock(&channel->recv_lock);
+ }
+ spin_unlock(&edge->channels_lock);
+
+ /*
+ * Creating a new channel requires allocating an smem entry, so we only
+ * have to scan if the amount of available space in smem have changed
+ * since last scan.
+ */
+ available = qcom_smem_get_free_space(edge->remote_pid);
+ if (available != edge->smem_available) {
+ edge->smem_available = available;
+ kick_scanner = true;
+ }
+
+ if (kick_scanner)
+ schedule_work(&edge->scan_work);
+ if (kick_state)
+ schedule_work(&edge->state_work);
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * Calculate how much space is available in the tx fifo.
+ */
+static size_t qcom_smd_get_tx_avail(struct qcom_smd_channel *channel)
+{
+ unsigned head;
+ unsigned tail;
+ unsigned mask = channel->fifo_size - 1;
+
+ head = GET_TX_CHANNEL_INFO(channel, head);
+ tail = GET_TX_CHANNEL_INFO(channel, tail);
+
+ return mask - ((head - tail) & mask);
+}
+
+/*
+ * Write count bytes of data into channel, possibly wrapping in the ring buffer
+ */
+static int qcom_smd_write_fifo(struct qcom_smd_channel *channel,
+ const void *data,
+ size_t count)
+{
+ bool word_aligned;
+ unsigned head;
+ size_t len;
+
+ word_aligned = channel->info_word;
+ head = GET_TX_CHANNEL_INFO(channel, head);
+
+ len = min_t(size_t, count, channel->fifo_size - head);
+ if (len) {
+ smd_copy_to_fifo(channel->tx_fifo + head,
+ data,
+ len,
+ word_aligned);
+ }
+
+ if (len != count) {
+ smd_copy_to_fifo(channel->tx_fifo,
+ data + len,
+ count - len,
+ word_aligned);
+ }
+
+ head += count;
+ head &= (channel->fifo_size - 1);
+ SET_TX_CHANNEL_INFO(channel, head, head);
+
+ return count;
+}
+
+/**
+ * qcom_smd_send - write data to smd channel
+ * @channel: channel handle
+ * @data: buffer of data to write
+ * @len: number of bytes to write
+ *
+ * This is a blocking write of len bytes into the channel's tx ring buffer and
+ * signal the remote end. It will sleep until there is enough space available
+ * in the tx buffer, utilizing the fBLOCKREADINTR signaling mechanism to avoid
+ * polling.
+ */
+static int __qcom_smd_send(struct qcom_smd_channel *channel, const void *data,
+ int len, bool wait)
+{
+ __le32 hdr[5] = { cpu_to_le32(len), };
+ int tlen = sizeof(hdr) + len;
+ int ret;
+
+ /* Word aligned channels only accept word size aligned data */
+ if (channel->info_word && len % 4)
+ return -EINVAL;
+
+ /* Reject packets that are too big */
+ if (tlen >= channel->fifo_size)
+ return -EINVAL;
+
+ ret = mutex_lock_interruptible(&channel->tx_lock);
+ if (ret)
+ return ret;
+
+ while (qcom_smd_get_tx_avail(channel) < tlen) {
+ if (!wait) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ if (channel->state != SMD_CHANNEL_OPENED) {
+ ret = -EPIPE;
+ goto out;
+ }
+
+ SET_TX_CHANNEL_FLAG(channel, fBLOCKREADINTR, 0);
+
+ ret = wait_event_interruptible(channel->fblockread_event,
+ qcom_smd_get_tx_avail(channel) >= tlen ||
+ channel->state != SMD_CHANNEL_OPENED);
+ if (ret)
+ goto out;
+
+ SET_TX_CHANNEL_FLAG(channel, fBLOCKREADINTR, 1);
+ }
+
+ SET_TX_CHANNEL_FLAG(channel, fTAIL, 0);
+
+ qcom_smd_write_fifo(channel, hdr, sizeof(hdr));
+ qcom_smd_write_fifo(channel, data, len);
+
+ SET_TX_CHANNEL_FLAG(channel, fHEAD, 1);
+
+ /* Ensure ordering of channel info updates */
+ wmb();
+
+ qcom_smd_signal_channel(channel);
+
+out:
+ mutex_unlock(&channel->tx_lock);
+
+ return ret;
+}
+
+/*
+ * Helper for opening a channel
+ */
+static int qcom_smd_channel_open(struct qcom_smd_channel *channel,
+ rpmsg_rx_cb_t cb)
+{
+ size_t bb_size;
+
+ /*
+ * Packets are maximum 4k, but reduce if the fifo is smaller
+ */
+ bb_size = min(channel->fifo_size, SZ_4K);
+ channel->bounce_buffer = kmalloc(bb_size, GFP_KERNEL);
+ if (!channel->bounce_buffer)
+ return -ENOMEM;
+
+ qcom_smd_channel_set_callback(channel, cb);
+ qcom_smd_channel_set_state(channel, SMD_CHANNEL_OPENING);
+ qcom_smd_channel_set_state(channel, SMD_CHANNEL_OPENED);
+
+ return 0;
+}
+
+/*
+ * Helper for closing and resetting a channel
+ */
+static void qcom_smd_channel_close(struct qcom_smd_channel *channel)
+{
+ qcom_smd_channel_set_callback(channel, NULL);
+
+ kfree(channel->bounce_buffer);
+ channel->bounce_buffer = NULL;
+
+ qcom_smd_channel_set_state(channel, SMD_CHANNEL_CLOSED);
+ qcom_smd_channel_reset(channel);
+}
+
+static struct qcom_smd_channel *
+qcom_smd_find_channel(struct qcom_smd_edge *edge, const char *name)
+{
+ struct qcom_smd_channel *channel;
+ struct qcom_smd_channel *ret = NULL;
+ unsigned long flags;
+ unsigned state;
+
+ spin_lock_irqsave(&edge->channels_lock, flags);
+ list_for_each_entry(channel, &edge->channels, list) {
+ if (strcmp(channel->name, name))
+ continue;
+
+ state = GET_RX_CHANNEL_INFO(channel, state);
+ if (state != SMD_CHANNEL_OPENING &&
+ state != SMD_CHANNEL_OPENED)
+ continue;
+
+ ret = channel;
+ break;
+ }
+ spin_unlock_irqrestore(&edge->channels_lock, flags);
+
+ return ret;
+}
+
+static void __ept_release(struct kref *kref)
+{
+ struct rpmsg_endpoint *ept = container_of(kref, struct rpmsg_endpoint,
+ refcount);
+ kfree(to_smd_endpoint(ept));
+}
+
+static struct rpmsg_endpoint *qcom_smd_create_ept(struct rpmsg_device *rpdev,
+ rpmsg_rx_cb_t cb, void *priv,
+ struct rpmsg_channel_info chinfo)
+{
+ struct qcom_smd_endpoint *qsept;
+ struct qcom_smd_channel *channel;
+ struct qcom_smd_device *qsdev = to_smd_device(rpdev);
+ struct qcom_smd_edge *edge = qsdev->edge;
+ struct rpmsg_endpoint *ept;
+ const char *name = chinfo.name;
+ int ret;
+
+ /* Wait up to HZ for the channel to appear */
+ ret = wait_event_interruptible_timeout(edge->new_channel_event,
+ (channel = qcom_smd_find_channel(edge, name)) != NULL,
+ HZ);
+ if (!ret)
+ return NULL;
+
+ if (channel->state != SMD_CHANNEL_CLOSED) {
+ dev_err(&rpdev->dev, "channel %s is busy\n", channel->name);
+ return NULL;
+ }
+
+ qsept = kzalloc(sizeof(*qsept), GFP_KERNEL);
+ if (!qsept)
+ return NULL;
+
+ ept = &qsept->ept;
+
+ kref_init(&ept->refcount);
+
+ ept->rpdev = rpdev;
+ ept->cb = cb;
+ ept->priv = priv;
+ ept->ops = &qcom_smd_endpoint_ops;
+
+ channel->qsept = qsept;
+ qsept->qsch = channel;
+
+ ret = qcom_smd_channel_open(channel, cb);
+ if (ret)
+ goto free_ept;
+
+ return ept;
+
+free_ept:
+ channel->qsept = NULL;
+ kref_put(&ept->refcount, __ept_release);
+ return NULL;
+}
+
+static void qcom_smd_destroy_ept(struct rpmsg_endpoint *ept)
+{
+ struct qcom_smd_endpoint *qsept = to_smd_endpoint(ept);
+ struct qcom_smd_channel *ch = qsept->qsch;
+
+ qcom_smd_channel_close(ch);
+ ch->qsept = NULL;
+ kref_put(&ept->refcount, __ept_release);
+}
+
+static int qcom_smd_send(struct rpmsg_endpoint *ept, void *data, int len)
+{
+ struct qcom_smd_endpoint *qsept = to_smd_endpoint(ept);
+
+ return __qcom_smd_send(qsept->qsch, data, len, true);
+}
+
+static int qcom_smd_trysend(struct rpmsg_endpoint *ept, void *data, int len)
+{
+ struct qcom_smd_endpoint *qsept = to_smd_endpoint(ept);
+
+ return __qcom_smd_send(qsept->qsch, data, len, false);
+}
+
+/*
+ * Finds the device_node for the smd child interested in this channel.
+ */
+static struct device_node *qcom_smd_match_channel(struct device_node *edge_node,
+ const char *channel)
+{
+ struct device_node *child;
+ const char *name;
+ const char *key;
+ int ret;
+
+ for_each_available_child_of_node(edge_node, child) {
+ key = "qcom,smd-channels";
+ ret = of_property_read_string(child, key, &name);
+ if (ret)
+ continue;
+
+ if (strcmp(name, channel) == 0)
+ return child;
+ }
+
+ return NULL;
+}
+
+static const struct rpmsg_device_ops qcom_smd_device_ops = {
+ .create_ept = qcom_smd_create_ept,
+};
+
+static const struct rpmsg_endpoint_ops qcom_smd_endpoint_ops = {
+ .destroy_ept = qcom_smd_destroy_ept,
+ .send = qcom_smd_send,
+ .trysend = qcom_smd_trysend,
+};
+
+/*
+ * Create a smd client device for channel that is being opened.
+ */
+static int qcom_smd_create_device(struct qcom_smd_channel *channel)
+{
+ struct qcom_smd_device *qsdev;
+ struct rpmsg_device *rpdev;
+ struct qcom_smd_edge *edge = channel->edge;
+
+ dev_dbg(&edge->dev, "registering '%s'\n", channel->name);
+
+ qsdev = kzalloc(sizeof(*qsdev), GFP_KERNEL);
+ if (!qsdev)
+ return -ENOMEM;
+
+ /* Link qsdev to our SMD edge */
+ qsdev->edge = edge;
+
+ /* Assign callbacks for rpmsg_device */
+ qsdev->rpdev.ops = &qcom_smd_device_ops;
+
+ /* Assign public information to the rpmsg_device */
+ rpdev = &qsdev->rpdev;
+ strncpy(rpdev->id.name, channel->name, RPMSG_NAME_SIZE);
+ rpdev->src = RPMSG_ADDR_ANY;
+ rpdev->dst = RPMSG_ADDR_ANY;
+
+ rpdev->dev.of_node = qcom_smd_match_channel(edge->of_node, channel->name);
+ rpdev->dev.parent = &edge->dev;
+
+ return rpmsg_register_device(rpdev);
+}
+
+/*
+ * Allocate the qcom_smd_channel object for a newly found smd channel,
+ * retrieving and validating the smem items involved.
+ */
+static struct qcom_smd_channel *qcom_smd_create_channel(struct qcom_smd_edge *edge,
+ unsigned smem_info_item,
+ unsigned smem_fifo_item,
+ char *name)
+{
+ struct qcom_smd_channel *channel;
+ size_t fifo_size;
+ size_t info_size;
+ void *fifo_base;
+ void *info;
+ int ret;
+
+ channel = devm_kzalloc(&edge->dev, sizeof(*channel), GFP_KERNEL);
+ if (!channel)
+ return ERR_PTR(-ENOMEM);
+
+ channel->edge = edge;
+ channel->name = devm_kstrdup(&edge->dev, name, GFP_KERNEL);
+ if (!channel->name)
+ return ERR_PTR(-ENOMEM);
+
+ mutex_init(&channel->tx_lock);
+ spin_lock_init(&channel->recv_lock);
+ init_waitqueue_head(&channel->fblockread_event);
+
+ info = qcom_smem_get(edge->remote_pid, smem_info_item, &info_size);
+ if (IS_ERR(info)) {
+ ret = PTR_ERR(info);
+ goto free_name_and_channel;
+ }
+
+ /*
+ * Use the size of the item to figure out which channel info struct to
+ * use.
+ */
+ if (info_size == 2 * sizeof(struct smd_channel_info_word)) {
+ channel->info_word = info;
+ } else if (info_size == 2 * sizeof(struct smd_channel_info)) {
+ channel->info = info;
+ } else {
+ dev_err(&edge->dev,
+ "channel info of size %zu not supported\n", info_size);
+ ret = -EINVAL;
+ goto free_name_and_channel;
+ }
+
+ fifo_base = qcom_smem_get(edge->remote_pid, smem_fifo_item, &fifo_size);
+ if (IS_ERR(fifo_base)) {
+ ret = PTR_ERR(fifo_base);
+ goto free_name_and_channel;
+ }
+
+ /* The channel consist of a rx and tx fifo of equal size */
+ fifo_size /= 2;
+
+ dev_dbg(&edge->dev, "new channel '%s' info-size: %zu fifo-size: %zu\n",
+ name, info_size, fifo_size);
+
+ channel->tx_fifo = fifo_base;
+ channel->rx_fifo = fifo_base + fifo_size;
+ channel->fifo_size = fifo_size;
+
+ qcom_smd_channel_reset(channel);
+
+ return channel;
+
+free_name_and_channel:
+ devm_kfree(&edge->dev, channel->name);
+ devm_kfree(&edge->dev, channel);
+
+ return ERR_PTR(ret);
+}
+
+/*
+ * Scans the allocation table for any newly allocated channels, calls
+ * qcom_smd_create_channel() to create representations of these and add
+ * them to the edge's list of channels.
+ */
+static void qcom_channel_scan_worker(struct work_struct *work)
+{
+ struct qcom_smd_edge *edge = container_of(work, struct qcom_smd_edge, scan_work);
+ struct qcom_smd_alloc_entry *alloc_tbl;
+ struct qcom_smd_alloc_entry *entry;
+ struct qcom_smd_channel *channel;
+ unsigned long flags;
+ unsigned fifo_id;
+ unsigned info_id;
+ int tbl;
+ int i;
+ u32 eflags, cid;
+
+ for (tbl = 0; tbl < SMD_ALLOC_TBL_COUNT; tbl++) {
+ alloc_tbl = qcom_smem_get(edge->remote_pid,
+ smem_items[tbl].alloc_tbl_id, NULL);
+ if (IS_ERR(alloc_tbl))
+ continue;
+
+ for (i = 0; i < SMD_ALLOC_TBL_SIZE; i++) {
+ entry = &alloc_tbl[i];
+ eflags = le32_to_cpu(entry->flags);
+ if (test_bit(i, edge->allocated[tbl]))
+ continue;
+
+ if (entry->ref_count == 0)
+ continue;
+
+ if (!entry->name[0])
+ continue;
+
+ if (!(eflags & SMD_CHANNEL_FLAGS_PACKET))
+ continue;
+
+ if ((eflags & SMD_CHANNEL_FLAGS_EDGE_MASK) != edge->edge_id)
+ continue;
+
+ cid = le32_to_cpu(entry->cid);
+ info_id = smem_items[tbl].info_base_id + cid;
+ fifo_id = smem_items[tbl].fifo_base_id + cid;
+
+ channel = qcom_smd_create_channel(edge, info_id, fifo_id, entry->name);
+ if (IS_ERR(channel))
+ continue;
+
+ spin_lock_irqsave(&edge->channels_lock, flags);
+ list_add(&channel->list, &edge->channels);
+ spin_unlock_irqrestore(&edge->channels_lock, flags);
+
+ dev_dbg(&edge->dev, "new channel found: '%s'\n", channel->name);
+ set_bit(i, edge->allocated[tbl]);
+
+ wake_up_interruptible(&edge->new_channel_event);
+ }
+ }
+
+ schedule_work(&edge->state_work);
+}
+
+/*
+ * This per edge worker scans smem for any new channels and register these. It
+ * then scans all registered channels for state changes that should be handled
+ * by creating or destroying smd client devices for the registered channels.
+ *
+ * LOCKING: edge->channels_lock only needs to cover the list operations, as the
+ * worker is killed before any channels are deallocated
+ */
+static void qcom_channel_state_worker(struct work_struct *work)
+{
+ struct qcom_smd_channel *channel;
+ struct qcom_smd_edge *edge = container_of(work,
+ struct qcom_smd_edge,
+ state_work);
+ struct rpmsg_channel_info chinfo;
+ unsigned remote_state;
+ unsigned long flags;
+
+ /*
+ * Register a device for any closed channel where the remote processor
+ * is showing interest in opening the channel.
+ */
+ spin_lock_irqsave(&edge->channels_lock, flags);
+ list_for_each_entry(channel, &edge->channels, list) {
+ if (channel->state != SMD_CHANNEL_CLOSED)
+ continue;
+
+ remote_state = GET_RX_CHANNEL_INFO(channel, state);
+ if (remote_state != SMD_CHANNEL_OPENING &&
+ remote_state != SMD_CHANNEL_OPENED)
+ continue;
+
+ if (channel->registered)
+ continue;
+
+ spin_unlock_irqrestore(&edge->channels_lock, flags);
+ qcom_smd_create_device(channel);
+ channel->registered = true;
+ spin_lock_irqsave(&edge->channels_lock, flags);
+
+ channel->registered = true;
+ }
+
+ /*
+ * Unregister the device for any channel that is opened where the
+ * remote processor is closing the channel.
+ */
+ list_for_each_entry(channel, &edge->channels, list) {
+ if (channel->state != SMD_CHANNEL_OPENING &&
+ channel->state != SMD_CHANNEL_OPENED)
+ continue;
+
+ remote_state = GET_RX_CHANNEL_INFO(channel, state);
+ if (remote_state == SMD_CHANNEL_OPENING ||
+ remote_state == SMD_CHANNEL_OPENED)
+ continue;
+
+ spin_unlock_irqrestore(&edge->channels_lock, flags);
+
+ strncpy(chinfo.name, channel->name, sizeof(chinfo.name));
+ chinfo.src = RPMSG_ADDR_ANY;
+ chinfo.dst = RPMSG_ADDR_ANY;
+ rpmsg_unregister_device(&edge->dev, &chinfo);
+ channel->registered = false;
+ spin_lock_irqsave(&edge->channels_lock, flags);
+ }
+ spin_unlock_irqrestore(&edge->channels_lock, flags);
+}
+
+/*
+ * Parses an of_node describing an edge.
+ */
+static int qcom_smd_parse_edge(struct device *dev,
+ struct device_node *node,
+ struct qcom_smd_edge *edge)
+{
+ struct device_node *syscon_np;
+ const char *key;
+ int irq;
+ int ret;
+
+ INIT_LIST_HEAD(&edge->channels);
+ spin_lock_init(&edge->channels_lock);
+
+ INIT_WORK(&edge->scan_work, qcom_channel_scan_worker);
+ INIT_WORK(&edge->state_work, qcom_channel_state_worker);
+
+ edge->of_node = of_node_get(node);
+
+ key = "qcom,smd-edge";
+ ret = of_property_read_u32(node, key, &edge->edge_id);
+ if (ret) {
+ dev_err(dev, "edge missing %s property\n", key);
+ return -EINVAL;
+ }
+
+ edge->remote_pid = QCOM_SMEM_HOST_ANY;
+ key = "qcom,remote-pid";
+ of_property_read_u32(node, key, &edge->remote_pid);
+
+ syscon_np = of_parse_phandle(node, "qcom,ipc", 0);
+ if (!syscon_np) {
+ dev_err(dev, "no qcom,ipc node\n");
+ return -ENODEV;
+ }
+
+ edge->ipc_regmap = syscon_node_to_regmap(syscon_np);
+ if (IS_ERR(edge->ipc_regmap))
+ return PTR_ERR(edge->ipc_regmap);
+
+ key = "qcom,ipc";
+ ret = of_property_read_u32_index(node, key, 1, &edge->ipc_offset);
+ if (ret < 0) {
+ dev_err(dev, "no offset in %s\n", key);
+ return -EINVAL;
+ }
+
+ ret = of_property_read_u32_index(node, key, 2, &edge->ipc_bit);
+ if (ret < 0) {
+ dev_err(dev, "no bit in %s\n", key);
+ return -EINVAL;
+ }
+
+ irq = irq_of_parse_and_map(node, 0);
+ if (irq < 0) {
+ dev_err(dev, "required smd interrupt missing\n");
+ return -EINVAL;
+ }
+
+ ret = devm_request_irq(dev, irq,
+ qcom_smd_edge_intr, IRQF_TRIGGER_RISING,
+ node->name, edge);
+ if (ret) {
+ dev_err(dev, "failed to request smd irq\n");
+ return ret;
+ }
+
+ edge->irq = irq;
+
+ return 0;
+}
+
+/*
+ * Release function for an edge.
+ * Reset the state of each associated channel and free the edge context.
+ */
+static void qcom_smd_edge_release(struct device *dev)
+{
+ struct qcom_smd_channel *channel;
+ struct qcom_smd_edge *edge = to_smd_edge(dev);
+
+ list_for_each_entry(channel, &edge->channels, list) {
+ SET_RX_CHANNEL_INFO(channel, state, SMD_CHANNEL_CLOSED);
+ SET_RX_CHANNEL_INFO(channel, head, 0);
+ SET_RX_CHANNEL_INFO(channel, tail, 0);
+ }
+
+ kfree(edge);
+}
+
+/**
+ * qcom_smd_register_edge() - register an edge based on an device_node
+ * @parent: parent device for the edge
+ * @node: device_node describing the edge
+ *
+ * Returns an edge reference, or negative ERR_PTR() on failure.
+ */
+struct qcom_smd_edge *qcom_smd_register_edge(struct device *parent,
+ struct device_node *node)
+{
+ struct qcom_smd_edge *edge;
+ int ret;
+
+ edge = kzalloc(sizeof(*edge), GFP_KERNEL);
+ if (!edge)
+ return ERR_PTR(-ENOMEM);
+
+ init_waitqueue_head(&edge->new_channel_event);
+
+ edge->dev.parent = parent;
+ edge->dev.release = qcom_smd_edge_release;
+ dev_set_name(&edge->dev, "%s:%s", dev_name(parent), node->name);
+ ret = device_register(&edge->dev);
+ if (ret) {
+ pr_err("failed to register smd edge\n");
+ return ERR_PTR(ret);
+ }
+
+ ret = qcom_smd_parse_edge(&edge->dev, node, edge);
+ if (ret) {
+ dev_err(&edge->dev, "failed to parse smd edge\n");
+ goto unregister_dev;
+ }
+
+ schedule_work(&edge->scan_work);
+
+ return edge;
+
+unregister_dev:
+ put_device(&edge->dev);
+ return ERR_PTR(ret);
+}
+EXPORT_SYMBOL(qcom_smd_register_edge);
+
+static int qcom_smd_remove_device(struct device *dev, void *data)
+{
+ device_unregister(dev);
+
+ return 0;
+}
+
+/**
+ * qcom_smd_unregister_edge() - release an edge and its children
+ * @edge: edge reference acquired from qcom_smd_register_edge
+ */
+int qcom_smd_unregister_edge(struct qcom_smd_edge *edge)
+{
+ int ret;
+
+ disable_irq(edge->irq);
+ cancel_work_sync(&edge->scan_work);
+ cancel_work_sync(&edge->state_work);
+
+ ret = device_for_each_child(&edge->dev, NULL, qcom_smd_remove_device);
+ if (ret)
+ dev_warn(&edge->dev, "can't remove smd device: %d\n", ret);
+
+ device_unregister(&edge->dev);
+
+ return 0;
+}
+EXPORT_SYMBOL(qcom_smd_unregister_edge);
+
+static int qcom_smd_probe(struct platform_device *pdev)
+{
+ struct device_node *node;
+ void *p;
+
+ /* Wait for smem */
+ p = qcom_smem_get(QCOM_SMEM_HOST_ANY, smem_items[0].alloc_tbl_id, NULL);
+ if (PTR_ERR(p) == -EPROBE_DEFER)
+ return PTR_ERR(p);
+
+ for_each_available_child_of_node(pdev->dev.of_node, node)
+ qcom_smd_register_edge(&pdev->dev, node);
+
+ return 0;
+}
+
+static int qcom_smd_remove_edge(struct device *dev, void *data)
+{
+ struct qcom_smd_edge *edge = to_smd_edge(dev);
+
+ return qcom_smd_unregister_edge(edge);
+}
+
+/*
+ * Shut down all smd clients by making sure that each edge stops processing
+ * events and scanning for new channels, then call destroy on the devices.
+ */
+static int qcom_smd_remove(struct platform_device *pdev)
+{
+ int ret;
+
+ ret = device_for_each_child(&pdev->dev, NULL, qcom_smd_remove_edge);
+ if (ret)
+ dev_warn(&pdev->dev, "can't remove smd device: %d\n", ret);
+
+ return ret;
+}
+
+static const struct of_device_id qcom_smd_of_match[] = {
+ { .compatible = "qcom,smd" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, qcom_smd_of_match);
+
+static struct platform_driver qcom_smd_driver = {
+ .probe = qcom_smd_probe,
+ .remove = qcom_smd_remove,
+ .driver = {
+ .name = "qcom-smd",
+ .of_match_table = qcom_smd_of_match,
+ },
+};
+
+static int __init qcom_smd_init(void)
+{
+ return platform_driver_register(&qcom_smd_driver);
+}
+subsys_initcall(qcom_smd_init);
+
+static void __exit qcom_smd_exit(void)
+{
+ platform_driver_unregister(&qcom_smd_driver);
+}
+module_exit(qcom_smd_exit);
+
+MODULE_AUTHOR("Bjorn Andersson <bjorn.andersson@sonymobile.com>");
+MODULE_DESCRIPTION("Qualcomm Shared Memory Driver");
+MODULE_LICENSE("GPL v2");
--- /dev/null
+/*
+ * remote processor messaging bus
+ *
+ * Copyright (C) 2011 Texas Instruments, Inc.
+ * Copyright (C) 2011 Google, Inc.
+ *
+ * Ohad Ben-Cohen <ohad@wizery.com>
+ * Brian Swetland <swetland@google.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#define pr_fmt(fmt) "%s: " fmt, __func__
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/rpmsg.h>
+#include <linux/of_device.h>
+#include <linux/slab.h>
+
+#include "rpmsg_internal.h"
+
+/**
+ * rpmsg_create_ept() - create a new rpmsg_endpoint
+ * @rpdev: rpmsg channel device
+ * @cb: rx callback handler
+ * @priv: private data for the driver's use
+ * @chinfo: channel_info with the local rpmsg address to bind with @cb
+ *
+ * Every rpmsg address in the system is bound to an rx callback (so when
+ * inbound messages arrive, they are dispatched by the rpmsg bus using the
+ * appropriate callback handler) by means of an rpmsg_endpoint struct.
+ *
+ * This function allows drivers to create such an endpoint, and by that,
+ * bind a callback, and possibly some private data too, to an rpmsg address
+ * (either one that is known in advance, or one that will be dynamically
+ * assigned for them).
+ *
+ * Simple rpmsg drivers need not call rpmsg_create_ept, because an endpoint
+ * is already created for them when they are probed by the rpmsg bus
+ * (using the rx callback provided when they registered to the rpmsg bus).
+ *
+ * So things should just work for simple drivers: they already have an
+ * endpoint, their rx callback is bound to their rpmsg address, and when
+ * relevant inbound messages arrive (i.e. messages which their dst address
+ * equals to the src address of their rpmsg channel), the driver's handler
+ * is invoked to process it.
+ *
+ * That said, more complicated drivers might do need to allocate
+ * additional rpmsg addresses, and bind them to different rx callbacks.
+ * To accomplish that, those drivers need to call this function.
+ *
+ * Drivers should provide their @rpdev channel (so the new endpoint would belong
+ * to the same remote processor their channel belongs to), an rx callback
+ * function, an optional private data (which is provided back when the
+ * rx callback is invoked), and an address they want to bind with the
+ * callback. If @addr is RPMSG_ADDR_ANY, then rpmsg_create_ept will
+ * dynamically assign them an available rpmsg address (drivers should have
+ * a very good reason why not to always use RPMSG_ADDR_ANY here).
+ *
+ * Returns a pointer to the endpoint on success, or NULL on error.
+ */
+struct rpmsg_endpoint *rpmsg_create_ept(struct rpmsg_device *rpdev,
+ rpmsg_rx_cb_t cb, void *priv,
+ struct rpmsg_channel_info chinfo)
+{
+ return rpdev->ops->create_ept(rpdev, cb, priv, chinfo);
+}
+EXPORT_SYMBOL(rpmsg_create_ept);
+
+/**
+ * rpmsg_destroy_ept() - destroy an existing rpmsg endpoint
+ * @ept: endpoing to destroy
+ *
+ * Should be used by drivers to destroy an rpmsg endpoint previously
+ * created with rpmsg_create_ept().
+ */
+void rpmsg_destroy_ept(struct rpmsg_endpoint *ept)
+{
+ ept->ops->destroy_ept(ept);
+}
+EXPORT_SYMBOL(rpmsg_destroy_ept);
+
+/**
+ * rpmsg_send() - send a message across to the remote processor
+ * @ept: the rpmsg endpoint
+ * @data: payload of message
+ * @len: length of payload
+ *
+ * This function sends @data of length @len on the @ept endpoint.
+ * The message will be sent to the remote processor which the @ept
+ * endpoint belongs to, using @ept's address and its associated rpmsg
+ * device destination addresses.
+ * In case there are no TX buffers available, the function will block until
+ * one becomes available, or a timeout of 15 seconds elapses. When the latter
+ * happens, -ERESTARTSYS is returned.
+ *
+ * Can only be called from process context (for now).
+ *
+ * Returns 0 on success and an appropriate error value on failure.
+ */
+int rpmsg_send(struct rpmsg_endpoint *ept, void *data, int len)
+{
+ return ept->ops->send(ept, data, len);
+}
+EXPORT_SYMBOL(rpmsg_send);
+
+/**
+ * rpmsg_sendto() - send a message across to the remote processor, specify dst
+ * @ept: the rpmsg endpoint
+ * @data: payload of message
+ * @len: length of payload
+ * @dst: destination address
+ *
+ * This function sends @data of length @len to the remote @dst address.
+ * The message will be sent to the remote processor which the @ept
+ * endpoint belongs to, using @ept's address as source.
+ * In case there are no TX buffers available, the function will block until
+ * one becomes available, or a timeout of 15 seconds elapses. When the latter
+ * happens, -ERESTARTSYS is returned.
+ *
+ * Can only be called from process context (for now).
+ *
+ * Returns 0 on success and an appropriate error value on failure.
+ */
+int rpmsg_sendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst)
+{
+ return ept->ops->sendto(ept, data, len, dst);
+}
+EXPORT_SYMBOL(rpmsg_sendto);
+
+/**
+ * rpmsg_send_offchannel() - send a message using explicit src/dst addresses
+ * @ept: the rpmsg endpoint
+ * @src: source address
+ * @dst: destination address
+ * @data: payload of message
+ * @len: length of payload
+ *
+ * This function sends @data of length @len to the remote @dst address,
+ * and uses @src as the source address.
+ * The message will be sent to the remote processor which the @ept
+ * endpoint belongs to.
+ * In case there are no TX buffers available, the function will block until
+ * one becomes available, or a timeout of 15 seconds elapses. When the latter
+ * happens, -ERESTARTSYS is returned.
+ *
+ * Can only be called from process context (for now).
+ *
+ * Returns 0 on success and an appropriate error value on failure.
+ */
+int rpmsg_send_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst,
+ void *data, int len)
+{
+ return ept->ops->send_offchannel(ept, src, dst, data, len);
+}
+EXPORT_SYMBOL(rpmsg_send_offchannel);
+
+/**
+ * rpmsg_send() - send a message across to the remote processor
+ * @ept: the rpmsg endpoint
+ * @data: payload of message
+ * @len: length of payload
+ *
+ * This function sends @data of length @len on the @ept endpoint.
+ * The message will be sent to the remote processor which the @ept
+ * endpoint belongs to, using @ept's address as source and its associated
+ * rpdev's address as destination.
+ * In case there are no TX buffers available, the function will immediately
+ * return -ENOMEM without waiting until one becomes available.
+ *
+ * Can only be called from process context (for now).
+ *
+ * Returns 0 on success and an appropriate error value on failure.
+ */
+int rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, int len)
+{
+ return ept->ops->trysend(ept, data, len);
+}
+EXPORT_SYMBOL(rpmsg_trysend);
+
+/**
+ * rpmsg_sendto() - send a message across to the remote processor, specify dst
+ * @ept: the rpmsg endpoint
+ * @data: payload of message
+ * @len: length of payload
+ * @dst: destination address
+ *
+ * This function sends @data of length @len to the remote @dst address.
+ * The message will be sent to the remote processor which the @ept
+ * endpoint belongs to, using @ept's address as source.
+ * In case there are no TX buffers available, the function will immediately
+ * return -ENOMEM without waiting until one becomes available.
+ *
+ * Can only be called from process context (for now).
+ *
+ * Returns 0 on success and an appropriate error value on failure.
+ */
+int rpmsg_trysendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst)
+{
+ return ept->ops->trysendto(ept, data, len, dst);
+}
+EXPORT_SYMBOL(rpmsg_trysendto);
+
+/**
+ * rpmsg_send_offchannel() - send a message using explicit src/dst addresses
+ * @ept: the rpmsg endpoint
+ * @src: source address
+ * @dst: destination address
+ * @data: payload of message
+ * @len: length of payload
+ *
+ * This function sends @data of length @len to the remote @dst address,
+ * and uses @src as the source address.
+ * The message will be sent to the remote processor which the @ept
+ * endpoint belongs to.
+ * In case there are no TX buffers available, the function will immediately
+ * return -ENOMEM without waiting until one becomes available.
+ *
+ * Can only be called from process context (for now).
+ *
+ * Returns 0 on success and an appropriate error value on failure.
+ */
+int rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst,
+ void *data, int len)
+{
+ return ept->ops->trysend_offchannel(ept, src, dst, data, len);
+}
+EXPORT_SYMBOL(rpmsg_trysend_offchannel);
+
+/*
+ * match an rpmsg channel with a channel info struct.
+ * this is used to make sure we're not creating rpmsg devices for channels
+ * that already exist.
+ */
+static int rpmsg_device_match(struct device *dev, void *data)
+{
+ struct rpmsg_channel_info *chinfo = data;
+ struct rpmsg_device *rpdev = to_rpmsg_device(dev);
+
+ if (chinfo->src != RPMSG_ADDR_ANY && chinfo->src != rpdev->src)
+ return 0;
+
+ if (chinfo->dst != RPMSG_ADDR_ANY && chinfo->dst != rpdev->dst)
+ return 0;
+
+ if (strncmp(chinfo->name, rpdev->id.name, RPMSG_NAME_SIZE))
+ return 0;
+
+ /* found a match ! */
+ return 1;
+}
+
+struct device *rpmsg_find_device(struct device *parent,
+ struct rpmsg_channel_info *chinfo)
+{
+ return device_find_child(parent, chinfo, rpmsg_device_match);
+
+}
+EXPORT_SYMBOL(rpmsg_find_device);
+
+/* sysfs show configuration fields */
+#define rpmsg_show_attr(field, path, format_string) \
+static ssize_t \
+field##_show(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ struct rpmsg_device *rpdev = to_rpmsg_device(dev); \
+ \
+ return sprintf(buf, format_string, rpdev->path); \
+}
+
+/* for more info, see Documentation/ABI/testing/sysfs-bus-rpmsg */
+rpmsg_show_attr(name, id.name, "%s\n");
+rpmsg_show_attr(src, src, "0x%x\n");
+rpmsg_show_attr(dst, dst, "0x%x\n");
+rpmsg_show_attr(announce, announce ? "true" : "false", "%s\n");
+
+static ssize_t modalias_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct rpmsg_device *rpdev = to_rpmsg_device(dev);
+
+ return sprintf(buf, RPMSG_DEVICE_MODALIAS_FMT "\n", rpdev->id.name);
+}
+
+static struct device_attribute rpmsg_dev_attrs[] = {
+ __ATTR_RO(name),
+ __ATTR_RO(modalias),
+ __ATTR_RO(dst),
+ __ATTR_RO(src),
+ __ATTR_RO(announce),
+ __ATTR_NULL
+};
+
+/* rpmsg devices and drivers are matched using the service name */
+static inline int rpmsg_id_match(const struct rpmsg_device *rpdev,
+ const struct rpmsg_device_id *id)
+{
+ return strncmp(id->name, rpdev->id.name, RPMSG_NAME_SIZE) == 0;
+}
+
+/* match rpmsg channel and rpmsg driver */
+static int rpmsg_dev_match(struct device *dev, struct device_driver *drv)
+{
+ struct rpmsg_device *rpdev = to_rpmsg_device(dev);
+ struct rpmsg_driver *rpdrv = to_rpmsg_driver(drv);
+ const struct rpmsg_device_id *ids = rpdrv->id_table;
+ unsigned int i;
+
+ if (ids)
+ for (i = 0; ids[i].name[0]; i++)
+ if (rpmsg_id_match(rpdev, &ids[i]))
+ return 1;
+
+ return of_driver_match_device(dev, drv);
+}
+
+static int rpmsg_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ struct rpmsg_device *rpdev = to_rpmsg_device(dev);
+
+ return add_uevent_var(env, "MODALIAS=" RPMSG_DEVICE_MODALIAS_FMT,
+ rpdev->id.name);
+}
+
+/*
+ * when an rpmsg driver is probed with a channel, we seamlessly create
+ * it an endpoint, binding its rx callback to a unique local rpmsg
+ * address.
+ *
+ * if we need to, we also announce about this channel to the remote
+ * processor (needed in case the driver is exposing an rpmsg service).
+ */
+static int rpmsg_dev_probe(struct device *dev)
+{
+ struct rpmsg_device *rpdev = to_rpmsg_device(dev);
+ struct rpmsg_driver *rpdrv = to_rpmsg_driver(rpdev->dev.driver);
+ struct rpmsg_channel_info chinfo = {};
+ struct rpmsg_endpoint *ept;
+ int err;
+
+ strncpy(chinfo.name, rpdev->id.name, RPMSG_NAME_SIZE);
+ chinfo.src = rpdev->src;
+ chinfo.dst = RPMSG_ADDR_ANY;
+
+ ept = rpmsg_create_ept(rpdev, rpdrv->callback, NULL, chinfo);
+ if (!ept) {
+ dev_err(dev, "failed to create endpoint\n");
+ err = -ENOMEM;
+ goto out;
+ }
+
+ rpdev->ept = ept;
+ rpdev->src = ept->addr;
+
+ err = rpdrv->probe(rpdev);
+ if (err) {
+ dev_err(dev, "%s: failed: %d\n", __func__, err);
+ rpmsg_destroy_ept(ept);
+ goto out;
+ }
+
+ if (rpdev->ops->announce_create)
+ err = rpdev->ops->announce_create(rpdev);
+out:
+ return err;
+}
+
+static int rpmsg_dev_remove(struct device *dev)
+{
+ struct rpmsg_device *rpdev = to_rpmsg_device(dev);
+ struct rpmsg_driver *rpdrv = to_rpmsg_driver(rpdev->dev.driver);
+ int err = 0;
+
+ if (rpdev->ops->announce_destroy)
+ err = rpdev->ops->announce_destroy(rpdev);
+
+ rpdrv->remove(rpdev);
+
+ rpmsg_destroy_ept(rpdev->ept);
+
+ return err;
+}
+
+static struct bus_type rpmsg_bus = {
+ .name = "rpmsg",
+ .match = rpmsg_dev_match,
+ .dev_attrs = rpmsg_dev_attrs,
+ .uevent = rpmsg_uevent,
+ .probe = rpmsg_dev_probe,
+ .remove = rpmsg_dev_remove,
+};
+
+static void rpmsg_release_device(struct device *dev)
+{
+ struct rpmsg_device *rpdev = to_rpmsg_device(dev);
+
+ kfree(rpdev);
+}
+
+int rpmsg_register_device(struct rpmsg_device *rpdev)
+{
+ struct device *dev = &rpdev->dev;
+ int ret;
+
+ dev_set_name(&rpdev->dev, "%s:%s",
+ dev_name(dev->parent), rpdev->id.name);
+
+ rpdev->dev.bus = &rpmsg_bus;
+ rpdev->dev.release = rpmsg_release_device;
+
+ ret = device_register(&rpdev->dev);
+ if (ret) {
+ dev_err(dev, "device_register failed: %d\n", ret);
+ put_device(&rpdev->dev);
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL(rpmsg_register_device);
+
+/*
+ * find an existing channel using its name + address properties,
+ * and destroy it
+ */
+int rpmsg_unregister_device(struct device *parent,
+ struct rpmsg_channel_info *chinfo)
+{
+ struct device *dev;
+
+ dev = rpmsg_find_device(parent, chinfo);
+ if (!dev)
+ return -EINVAL;
+
+ device_unregister(dev);
+
+ put_device(dev);
+
+ return 0;
+}
+EXPORT_SYMBOL(rpmsg_unregister_device);
+
+/**
+ * __register_rpmsg_driver() - register an rpmsg driver with the rpmsg bus
+ * @rpdrv: pointer to a struct rpmsg_driver
+ * @owner: owning module/driver
+ *
+ * Returns 0 on success, and an appropriate error value on failure.
+ */
+int __register_rpmsg_driver(struct rpmsg_driver *rpdrv, struct module *owner)
+{
+ rpdrv->drv.bus = &rpmsg_bus;
+ rpdrv->drv.owner = owner;
+ return driver_register(&rpdrv->drv);
+}
+EXPORT_SYMBOL(__register_rpmsg_driver);
+
+/**
+ * unregister_rpmsg_driver() - unregister an rpmsg driver from the rpmsg bus
+ * @rpdrv: pointer to a struct rpmsg_driver
+ *
+ * Returns 0 on success, and an appropriate error value on failure.
+ */
+void unregister_rpmsg_driver(struct rpmsg_driver *rpdrv)
+{
+ driver_unregister(&rpdrv->drv);
+}
+EXPORT_SYMBOL(unregister_rpmsg_driver);
+
+
+static int __init rpmsg_init(void)
+{
+ int ret;
+
+ ret = bus_register(&rpmsg_bus);
+ if (ret)
+ pr_err("failed to register rpmsg bus: %d\n", ret);
+
+ return ret;
+}
+postcore_initcall(rpmsg_init);
+
+static void __exit rpmsg_fini(void)
+{
+ bus_unregister(&rpmsg_bus);
+}
+module_exit(rpmsg_fini);
+
+MODULE_DESCRIPTION("remote processor messaging bus");
+MODULE_LICENSE("GPL v2");
--- /dev/null
+/*
+ * remote processor messaging bus internals
+ *
+ * Copyright (C) 2011 Texas Instruments, Inc.
+ * Copyright (C) 2011 Google, Inc.
+ *
+ * Ohad Ben-Cohen <ohad@wizery.com>
+ * Brian Swetland <swetland@google.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __RPMSG_INTERNAL_H__
+#define __RPMSG_INTERNAL_H__
+
+#include <linux/rpmsg.h>
+
+#define to_rpmsg_device(d) container_of(d, struct rpmsg_device, dev)
+#define to_rpmsg_driver(d) container_of(d, struct rpmsg_driver, drv)
+
+/**
+ * struct rpmsg_device_ops - indirection table for the rpmsg_device operations
+ * @create_ept: create backend-specific endpoint, requried
+ * @announce_create: announce presence of new channel, optional
+ * @announce_destroy: announce destruction of channel, optional
+ *
+ * Indirection table for the operations that a rpmsg backend should implement.
+ * @announce_create and @announce_destroy are optional as the backend might
+ * advertise new channels implicitly by creating the endpoints.
+ */
+struct rpmsg_device_ops {
+ struct rpmsg_endpoint *(*create_ept)(struct rpmsg_device *rpdev,
+ rpmsg_rx_cb_t cb, void *priv,
+ struct rpmsg_channel_info chinfo);
+
+ int (*announce_create)(struct rpmsg_device *ept);
+ int (*announce_destroy)(struct rpmsg_device *ept);
+};
+
+/**
+ * struct rpmsg_endpoint_ops - indirection table for rpmsg_endpoint operations
+ * @destroy_ept: destroy the given endpoint, required
+ * @send: see @rpmsg_send(), required
+ * @sendto: see @rpmsg_sendto(), optional
+ * @send_offchannel: see @rpmsg_send_offchannel(), optional
+ * @trysend: see @rpmsg_trysend(), required
+ * @trysendto: see @rpmsg_trysendto(), optional
+ * @trysend_offchannel: see @rpmsg_trysend_offchannel(), optional
+ *
+ * Indirection table for the operations that a rpmsg backend should implement.
+ * In addition to @destroy_ept, the backend must at least implement @send and
+ * @trysend, while the variants sending data off-channel are optional.
+ */
+struct rpmsg_endpoint_ops {
+ void (*destroy_ept)(struct rpmsg_endpoint *ept);
+
+ int (*send)(struct rpmsg_endpoint *ept, void *data, int len);
+ int (*sendto)(struct rpmsg_endpoint *ept, void *data, int len, u32 dst);
+ int (*send_offchannel)(struct rpmsg_endpoint *ept, u32 src, u32 dst,
+ void *data, int len);
+
+ int (*trysend)(struct rpmsg_endpoint *ept, void *data, int len);
+ int (*trysendto)(struct rpmsg_endpoint *ept, void *data, int len, u32 dst);
+ int (*trysend_offchannel)(struct rpmsg_endpoint *ept, u32 src, u32 dst,
+ void *data, int len);
+};
+
+int rpmsg_register_device(struct rpmsg_device *rpdev);
+int rpmsg_unregister_device(struct device *parent,
+ struct rpmsg_channel_info *chinfo);
+
+struct device *rpmsg_find_device(struct device *parent,
+ struct rpmsg_channel_info *chinfo);
+
+#endif
#include <linux/wait.h>
#include <linux/rpmsg.h>
#include <linux/mutex.h>
+#include <linux/of_device.h>
+
+#include "rpmsg_internal.h"
/**
* struct virtproc_info - virtual remote processor state
struct rpmsg_endpoint *ns_ept;
};
+/* The feature bitmap for virtio rpmsg */
+#define VIRTIO_RPMSG_F_NS 0 /* RP supports name service notifications */
+
/**
- * struct rpmsg_channel_info - internal channel info representation
- * @name: name of service
- * @src: local address
+ * struct rpmsg_hdr - common header for all rpmsg messages
+ * @src: source address
* @dst: destination address
+ * @reserved: reserved for future use
+ * @len: length of payload (in bytes)
+ * @flags: message flags
+ * @data: @len bytes of message payload data
+ *
+ * Every message sent(/received) on the rpmsg bus begins with this header.
*/
-struct rpmsg_channel_info {
- char name[RPMSG_NAME_SIZE];
+struct rpmsg_hdr {
u32 src;
u32 dst;
+ u32 reserved;
+ u16 len;
+ u16 flags;
+ u8 data[0];
+} __packed;
+
+/**
+ * struct rpmsg_ns_msg - dynamic name service announcement message
+ * @name: name of remote service that is published
+ * @addr: address of remote service that is published
+ * @flags: indicates whether service is created or destroyed
+ *
+ * This message is sent across to publish a new service, or announce
+ * about its removal. When we receive these messages, an appropriate
+ * rpmsg channel (i.e device) is created/destroyed. In turn, the ->probe()
+ * or ->remove() handler of the appropriate rpmsg driver will be invoked
+ * (if/as-soon-as one is registered).
+ */
+struct rpmsg_ns_msg {
+ char name[RPMSG_NAME_SIZE];
+ u32 addr;
+ u32 flags;
+} __packed;
+
+/**
+ * enum rpmsg_ns_flags - dynamic name service announcement flags
+ *
+ * @RPMSG_NS_CREATE: a new remote service was just created
+ * @RPMSG_NS_DESTROY: a known remote service was just destroyed
+ */
+enum rpmsg_ns_flags {
+ RPMSG_NS_CREATE = 0,
+ RPMSG_NS_DESTROY = 1,
+};
+
+/**
+ * @vrp: the remote processor this channel belongs to
+ */
+struct virtio_rpmsg_channel {
+ struct rpmsg_device rpdev;
+
+ struct virtproc_info *vrp;
};
-#define to_rpmsg_channel(d) container_of(d, struct rpmsg_channel, dev)
-#define to_rpmsg_driver(d) container_of(d, struct rpmsg_driver, drv)
+#define to_virtio_rpmsg_channel(_rpdev) \
+ container_of(_rpdev, struct virtio_rpmsg_channel, rpdev)
/*
* We're allocating buffers of 512 bytes each for communications. The
/* Address 53 is reserved for advertising remote services */
#define RPMSG_NS_ADDR (53)
-/* sysfs show configuration fields */
-#define rpmsg_show_attr(field, path, format_string) \
-static ssize_t \
-field##_show(struct device *dev, \
- struct device_attribute *attr, char *buf) \
-{ \
- struct rpmsg_channel *rpdev = to_rpmsg_channel(dev); \
- \
- return sprintf(buf, format_string, rpdev->path); \
-}
-
-/* for more info, see Documentation/ABI/testing/sysfs-bus-rpmsg */
-rpmsg_show_attr(name, id.name, "%s\n");
-rpmsg_show_attr(src, src, "0x%x\n");
-rpmsg_show_attr(dst, dst, "0x%x\n");
-rpmsg_show_attr(announce, announce ? "true" : "false", "%s\n");
-
-/*
- * Unique (and free running) index for rpmsg devices.
- *
- * Yeah, we're not recycling those numbers (yet?). will be easy
- * to change if/when we want to.
- */
-static unsigned int rpmsg_dev_index;
-
-static ssize_t modalias_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct rpmsg_channel *rpdev = to_rpmsg_channel(dev);
-
- return sprintf(buf, RPMSG_DEVICE_MODALIAS_FMT "\n", rpdev->id.name);
-}
-
-static struct device_attribute rpmsg_dev_attrs[] = {
- __ATTR_RO(name),
- __ATTR_RO(modalias),
- __ATTR_RO(dst),
- __ATTR_RO(src),
- __ATTR_RO(announce),
- __ATTR_NULL
+static void virtio_rpmsg_destroy_ept(struct rpmsg_endpoint *ept);
+static int virtio_rpmsg_send(struct rpmsg_endpoint *ept, void *data, int len);
+static int virtio_rpmsg_sendto(struct rpmsg_endpoint *ept, void *data, int len,
+ u32 dst);
+static int virtio_rpmsg_send_offchannel(struct rpmsg_endpoint *ept, u32 src,
+ u32 dst, void *data, int len);
+static int virtio_rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, int len);
+static int virtio_rpmsg_trysendto(struct rpmsg_endpoint *ept, void *data,
+ int len, u32 dst);
+static int virtio_rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32 src,
+ u32 dst, void *data, int len);
+
+static const struct rpmsg_endpoint_ops virtio_endpoint_ops = {
+ .destroy_ept = virtio_rpmsg_destroy_ept,
+ .send = virtio_rpmsg_send,
+ .sendto = virtio_rpmsg_sendto,
+ .send_offchannel = virtio_rpmsg_send_offchannel,
+ .trysend = virtio_rpmsg_trysend,
+ .trysendto = virtio_rpmsg_trysendto,
+ .trysend_offchannel = virtio_rpmsg_trysend_offchannel,
};
-/* rpmsg devices and drivers are matched using the service name */
-static inline int rpmsg_id_match(const struct rpmsg_channel *rpdev,
- const struct rpmsg_device_id *id)
-{
- return strncmp(id->name, rpdev->id.name, RPMSG_NAME_SIZE) == 0;
-}
-
-/* match rpmsg channel and rpmsg driver */
-static int rpmsg_dev_match(struct device *dev, struct device_driver *drv)
-{
- struct rpmsg_channel *rpdev = to_rpmsg_channel(dev);
- struct rpmsg_driver *rpdrv = to_rpmsg_driver(drv);
- const struct rpmsg_device_id *ids = rpdrv->id_table;
- unsigned int i;
-
- for (i = 0; ids[i].name[0]; i++)
- if (rpmsg_id_match(rpdev, &ids[i]))
- return 1;
-
- return 0;
-}
-
-static int rpmsg_uevent(struct device *dev, struct kobj_uevent_env *env)
-{
- struct rpmsg_channel *rpdev = to_rpmsg_channel(dev);
-
- return add_uevent_var(env, "MODALIAS=" RPMSG_DEVICE_MODALIAS_FMT,
- rpdev->id.name);
-}
-
/**
* __ept_release() - deallocate an rpmsg endpoint
* @kref: the ept's reference count
/* for more info, see below documentation of rpmsg_create_ept() */
static struct rpmsg_endpoint *__rpmsg_create_ept(struct virtproc_info *vrp,
- struct rpmsg_channel *rpdev, rpmsg_rx_cb_t cb,
- void *priv, u32 addr)
+ struct rpmsg_device *rpdev,
+ rpmsg_rx_cb_t cb,
+ void *priv, u32 addr)
{
int id_min, id_max, id;
struct rpmsg_endpoint *ept;
struct device *dev = rpdev ? &rpdev->dev : &vrp->vdev->dev;
ept = kzalloc(sizeof(*ept), GFP_KERNEL);
- if (!ept) {
- dev_err(dev, "failed to kzalloc a new ept\n");
+ if (!ept)
return NULL;
- }
kref_init(&ept->refcount);
mutex_init(&ept->cb_lock);
ept->rpdev = rpdev;
ept->cb = cb;
ept->priv = priv;
+ ept->ops = &virtio_endpoint_ops;
/* do we need to allocate a local address ? */
if (addr == RPMSG_ADDR_ANY) {
return NULL;
}
-/**
- * rpmsg_create_ept() - create a new rpmsg_endpoint
- * @rpdev: rpmsg channel device
- * @cb: rx callback handler
- * @priv: private data for the driver's use
- * @addr: local rpmsg address to bind with @cb
- *
- * Every rpmsg address in the system is bound to an rx callback (so when
- * inbound messages arrive, they are dispatched by the rpmsg bus using the
- * appropriate callback handler) by means of an rpmsg_endpoint struct.
- *
- * This function allows drivers to create such an endpoint, and by that,
- * bind a callback, and possibly some private data too, to an rpmsg address
- * (either one that is known in advance, or one that will be dynamically
- * assigned for them).
- *
- * Simple rpmsg drivers need not call rpmsg_create_ept, because an endpoint
- * is already created for them when they are probed by the rpmsg bus
- * (using the rx callback provided when they registered to the rpmsg bus).
- *
- * So things should just work for simple drivers: they already have an
- * endpoint, their rx callback is bound to their rpmsg address, and when
- * relevant inbound messages arrive (i.e. messages which their dst address
- * equals to the src address of their rpmsg channel), the driver's handler
- * is invoked to process it.
- *
- * That said, more complicated drivers might do need to allocate
- * additional rpmsg addresses, and bind them to different rx callbacks.
- * To accomplish that, those drivers need to call this function.
- *
- * Drivers should provide their @rpdev channel (so the new endpoint would belong
- * to the same remote processor their channel belongs to), an rx callback
- * function, an optional private data (which is provided back when the
- * rx callback is invoked), and an address they want to bind with the
- * callback. If @addr is RPMSG_ADDR_ANY, then rpmsg_create_ept will
- * dynamically assign them an available rpmsg address (drivers should have
- * a very good reason why not to always use RPMSG_ADDR_ANY here).
- *
- * Returns a pointer to the endpoint on success, or NULL on error.
- */
-struct rpmsg_endpoint *rpmsg_create_ept(struct rpmsg_channel *rpdev,
- rpmsg_rx_cb_t cb, void *priv, u32 addr)
+static struct rpmsg_endpoint *virtio_rpmsg_create_ept(struct rpmsg_device *rpdev,
+ rpmsg_rx_cb_t cb,
+ void *priv,
+ struct rpmsg_channel_info chinfo)
{
- return __rpmsg_create_ept(rpdev->vrp, rpdev, cb, priv, addr);
+ struct virtio_rpmsg_channel *vch = to_virtio_rpmsg_channel(rpdev);
+
+ return __rpmsg_create_ept(vch->vrp, rpdev, cb, priv, chinfo.src);
}
-EXPORT_SYMBOL(rpmsg_create_ept);
/**
* __rpmsg_destroy_ept() - destroy an existing rpmsg endpoint
kref_put(&ept->refcount, __ept_release);
}
-/**
- * rpmsg_destroy_ept() - destroy an existing rpmsg endpoint
- * @ept: endpoing to destroy
- *
- * Should be used by drivers to destroy an rpmsg endpoint previously
- * created with rpmsg_create_ept().
- */
-void rpmsg_destroy_ept(struct rpmsg_endpoint *ept)
+static void virtio_rpmsg_destroy_ept(struct rpmsg_endpoint *ept)
{
- __rpmsg_destroy_ept(ept->rpdev->vrp, ept);
+ struct virtio_rpmsg_channel *vch = to_virtio_rpmsg_channel(ept->rpdev);
+
+ __rpmsg_destroy_ept(vch->vrp, ept);
}
-EXPORT_SYMBOL(rpmsg_destroy_ept);
-/*
- * when an rpmsg driver is probed with a channel, we seamlessly create
- * it an endpoint, binding its rx callback to a unique local rpmsg
- * address.
- *
- * if we need to, we also announce about this channel to the remote
- * processor (needed in case the driver is exposing an rpmsg service).
- */
-static int rpmsg_dev_probe(struct device *dev)
+static int virtio_rpmsg_announce_create(struct rpmsg_device *rpdev)
{
- struct rpmsg_channel *rpdev = to_rpmsg_channel(dev);
- struct rpmsg_driver *rpdrv = to_rpmsg_driver(rpdev->dev.driver);
- struct virtproc_info *vrp = rpdev->vrp;
- struct rpmsg_endpoint *ept;
- int err;
-
- ept = rpmsg_create_ept(rpdev, rpdrv->callback, NULL, rpdev->src);
- if (!ept) {
- dev_err(dev, "failed to create endpoint\n");
- err = -ENOMEM;
- goto out;
- }
-
- rpdev->ept = ept;
- rpdev->src = ept->addr;
-
- err = rpdrv->probe(rpdev);
- if (err) {
- dev_err(dev, "%s: failed: %d\n", __func__, err);
- rpmsg_destroy_ept(ept);
- goto out;
- }
+ struct virtio_rpmsg_channel *vch = to_virtio_rpmsg_channel(rpdev);
+ struct virtproc_info *vrp = vch->vrp;
+ struct device *dev = &rpdev->dev;
+ int err = 0;
/* need to tell remote processor's name service about this channel ? */
if (rpdev->announce &&
- virtio_has_feature(vrp->vdev, VIRTIO_RPMSG_F_NS)) {
+ virtio_has_feature(vrp->vdev, VIRTIO_RPMSG_F_NS)) {
struct rpmsg_ns_msg nsm;
strncpy(nsm.name, rpdev->id.name, RPMSG_NAME_SIZE);
- nsm.addr = rpdev->src;
+ nsm.addr = rpdev->ept->addr;
nsm.flags = RPMSG_NS_CREATE;
- err = rpmsg_sendto(rpdev, &nsm, sizeof(nsm), RPMSG_NS_ADDR);
+ err = rpmsg_sendto(rpdev->ept, &nsm, sizeof(nsm), RPMSG_NS_ADDR);
if (err)
dev_err(dev, "failed to announce service %d\n", err);
}
-out:
return err;
}
-static int rpmsg_dev_remove(struct device *dev)
+static int virtio_rpmsg_announce_destroy(struct rpmsg_device *rpdev)
{
- struct rpmsg_channel *rpdev = to_rpmsg_channel(dev);
- struct rpmsg_driver *rpdrv = to_rpmsg_driver(rpdev->dev.driver);
- struct virtproc_info *vrp = rpdev->vrp;
+ struct virtio_rpmsg_channel *vch = to_virtio_rpmsg_channel(rpdev);
+ struct virtproc_info *vrp = vch->vrp;
+ struct device *dev = &rpdev->dev;
int err = 0;
/* tell remote processor's name service we're removing this channel */
if (rpdev->announce &&
- virtio_has_feature(vrp->vdev, VIRTIO_RPMSG_F_NS)) {
+ virtio_has_feature(vrp->vdev, VIRTIO_RPMSG_F_NS)) {
struct rpmsg_ns_msg nsm;
strncpy(nsm.name, rpdev->id.name, RPMSG_NAME_SIZE);
nsm.addr = rpdev->src;
nsm.flags = RPMSG_NS_DESTROY;
- err = rpmsg_sendto(rpdev, &nsm, sizeof(nsm), RPMSG_NS_ADDR);
+ err = rpmsg_sendto(rpdev->ept, &nsm, sizeof(nsm), RPMSG_NS_ADDR);
if (err)
dev_err(dev, "failed to announce service %d\n", err);
}
- rpdrv->remove(rpdev);
-
- rpmsg_destroy_ept(rpdev->ept);
-
return err;
}
-static struct bus_type rpmsg_bus = {
- .name = "rpmsg",
- .match = rpmsg_dev_match,
- .dev_attrs = rpmsg_dev_attrs,
- .uevent = rpmsg_uevent,
- .probe = rpmsg_dev_probe,
- .remove = rpmsg_dev_remove,
+static const struct rpmsg_device_ops virtio_rpmsg_ops = {
+ .create_ept = virtio_rpmsg_create_ept,
+ .announce_create = virtio_rpmsg_announce_create,
+ .announce_destroy = virtio_rpmsg_announce_destroy,
};
-/**
- * __register_rpmsg_driver() - register an rpmsg driver with the rpmsg bus
- * @rpdrv: pointer to a struct rpmsg_driver
- * @owner: owning module/driver
- *
- * Returns 0 on success, and an appropriate error value on failure.
- */
-int __register_rpmsg_driver(struct rpmsg_driver *rpdrv, struct module *owner)
-{
- rpdrv->drv.bus = &rpmsg_bus;
- rpdrv->drv.owner = owner;
- return driver_register(&rpdrv->drv);
-}
-EXPORT_SYMBOL(__register_rpmsg_driver);
-
-/**
- * unregister_rpmsg_driver() - unregister an rpmsg driver from the rpmsg bus
- * @rpdrv: pointer to a struct rpmsg_driver
- *
- * Returns 0 on success, and an appropriate error value on failure.
- */
-void unregister_rpmsg_driver(struct rpmsg_driver *rpdrv)
-{
- driver_unregister(&rpdrv->drv);
-}
-EXPORT_SYMBOL(unregister_rpmsg_driver);
-
-static void rpmsg_release_device(struct device *dev)
-{
- struct rpmsg_channel *rpdev = to_rpmsg_channel(dev);
-
- kfree(rpdev);
-}
-
-/*
- * match an rpmsg channel with a channel info struct.
- * this is used to make sure we're not creating rpmsg devices for channels
- * that already exist.
- */
-static int rpmsg_channel_match(struct device *dev, void *data)
-{
- struct rpmsg_channel_info *chinfo = data;
- struct rpmsg_channel *rpdev = to_rpmsg_channel(dev);
-
- if (chinfo->src != RPMSG_ADDR_ANY && chinfo->src != rpdev->src)
- return 0;
-
- if (chinfo->dst != RPMSG_ADDR_ANY && chinfo->dst != rpdev->dst)
- return 0;
-
- if (strncmp(chinfo->name, rpdev->id.name, RPMSG_NAME_SIZE))
- return 0;
-
- /* found a match ! */
- return 1;
-}
-
/*
* create an rpmsg channel using its name and address info.
* this function will be used to create both static and dynamic
* channels.
*/
-static struct rpmsg_channel *rpmsg_create_channel(struct virtproc_info *vrp,
- struct rpmsg_channel_info *chinfo)
+static struct rpmsg_device *rpmsg_create_channel(struct virtproc_info *vrp,
+ struct rpmsg_channel_info *chinfo)
{
- struct rpmsg_channel *rpdev;
+ struct virtio_rpmsg_channel *vch;
+ struct rpmsg_device *rpdev;
struct device *tmp, *dev = &vrp->vdev->dev;
int ret;
/* make sure a similar channel doesn't already exist */
- tmp = device_find_child(dev, chinfo, rpmsg_channel_match);
+ tmp = rpmsg_find_device(dev, chinfo);
if (tmp) {
/* decrement the matched device's refcount back */
put_device(tmp);
return NULL;
}
- rpdev = kzalloc(sizeof(struct rpmsg_channel), GFP_KERNEL);
- if (!rpdev) {
- pr_err("kzalloc failed\n");
+ vch = kzalloc(sizeof(*vch), GFP_KERNEL);
+ if (!vch)
return NULL;
- }
- rpdev->vrp = vrp;
+ /* Link the channel to our vrp */
+ vch->vrp = vrp;
+
+ /* Assign callbacks for rpmsg_channel */
+ vch->rpdev.ops = &virtio_rpmsg_ops;
+
+ /* Assign public information to the rpmsg_device */
+ rpdev = &vch->rpdev;
rpdev->src = chinfo->src;
rpdev->dst = chinfo->dst;
+ rpdev->ops = &virtio_rpmsg_ops;
/*
* rpmsg server channels has predefined local address (for now),
* and their existence needs to be announced remotely
*/
- rpdev->announce = rpdev->src != RPMSG_ADDR_ANY ? true : false;
+ rpdev->announce = rpdev->src != RPMSG_ADDR_ANY;
strncpy(rpdev->id.name, chinfo->name, RPMSG_NAME_SIZE);
- /* very simple device indexing plumbing which is enough for now */
- dev_set_name(&rpdev->dev, "rpmsg%d", rpmsg_dev_index++);
-
rpdev->dev.parent = &vrp->vdev->dev;
- rpdev->dev.bus = &rpmsg_bus;
- rpdev->dev.release = rpmsg_release_device;
-
- ret = device_register(&rpdev->dev);
- if (ret) {
- dev_err(dev, "device_register failed: %d\n", ret);
- put_device(&rpdev->dev);
+ ret = rpmsg_register_device(rpdev);
+ if (ret)
return NULL;
- }
return rpdev;
}
-/*
- * find an existing channel using its name + address properties,
- * and destroy it
- */
-static int rpmsg_destroy_channel(struct virtproc_info *vrp,
- struct rpmsg_channel_info *chinfo)
-{
- struct virtio_device *vdev = vrp->vdev;
- struct device *dev;
-
- dev = device_find_child(&vdev->dev, chinfo, rpmsg_channel_match);
- if (!dev)
- return -EINVAL;
-
- device_unregister(dev);
-
- put_device(dev);
-
- return 0;
-}
-
/* super simple buffer "allocator" that is just enough for now */
static void *get_a_tx_buf(struct virtproc_info *vrp)
{
*
* Returns 0 on success and an appropriate error value on failure.
*/
-int rpmsg_send_offchannel_raw(struct rpmsg_channel *rpdev, u32 src, u32 dst,
- void *data, int len, bool wait)
+static int rpmsg_send_offchannel_raw(struct rpmsg_device *rpdev,
+ u32 src, u32 dst,
+ void *data, int len, bool wait)
{
- struct virtproc_info *vrp = rpdev->vrp;
+ struct virtio_rpmsg_channel *vch = to_virtio_rpmsg_channel(rpdev);
+ struct virtproc_info *vrp = vch->vrp;
struct device *dev = &rpdev->dev;
struct scatterlist sg;
struct rpmsg_hdr *msg;
memcpy(msg->data, data, len);
dev_dbg(dev, "TX From 0x%x, To 0x%x, Len %d, Flags %d, Reserved %d\n",
- msg->src, msg->dst, msg->len,
- msg->flags, msg->reserved);
- print_hex_dump(KERN_DEBUG, "rpmsg_virtio TX: ", DUMP_PREFIX_NONE, 16, 1,
- msg, sizeof(*msg) + msg->len, true);
+ msg->src, msg->dst, msg->len, msg->flags, msg->reserved);
+#if defined(CONFIG_DYNAMIC_DEBUG)
+ dynamic_hex_dump("rpmsg_virtio TX: ", DUMP_PREFIX_NONE, 16, 1,
+ msg, sizeof(*msg) + msg->len, true);
+#endif
sg_init_one(&sg, msg, sizeof(*msg) + len);
}
EXPORT_SYMBOL(rpmsg_send_offchannel_raw);
+static int virtio_rpmsg_send(struct rpmsg_endpoint *ept, void *data, int len)
+{
+ struct rpmsg_device *rpdev = ept->rpdev;
+ u32 src = ept->addr, dst = rpdev->dst;
+
+ return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, true);
+}
+
+static int virtio_rpmsg_sendto(struct rpmsg_endpoint *ept, void *data, int len,
+ u32 dst)
+{
+ struct rpmsg_device *rpdev = ept->rpdev;
+ u32 src = ept->addr;
+
+ return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, true);
+}
+
+static int virtio_rpmsg_send_offchannel(struct rpmsg_endpoint *ept, u32 src,
+ u32 dst, void *data, int len)
+{
+ struct rpmsg_device *rpdev = ept->rpdev;
+
+ return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, true);
+}
+
+static int virtio_rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, int len)
+{
+ struct rpmsg_device *rpdev = ept->rpdev;
+ u32 src = ept->addr, dst = rpdev->dst;
+
+ return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, false);
+}
+
+static int virtio_rpmsg_trysendto(struct rpmsg_endpoint *ept, void *data,
+ int len, u32 dst)
+{
+ struct rpmsg_device *rpdev = ept->rpdev;
+ u32 src = ept->addr;
+
+ return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, false);
+}
+
+static int virtio_rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32 src,
+ u32 dst, void *data, int len)
+{
+ struct rpmsg_device *rpdev = ept->rpdev;
+
+ return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, false);
+}
+
static int rpmsg_recv_single(struct virtproc_info *vrp, struct device *dev,
struct rpmsg_hdr *msg, unsigned int len)
{
int err;
dev_dbg(dev, "From: 0x%x, To: 0x%x, Len: %d, Flags: %d, Reserved: %d\n",
- msg->src, msg->dst, msg->len,
- msg->flags, msg->reserved);
- print_hex_dump(KERN_DEBUG, "rpmsg_virtio RX: ", DUMP_PREFIX_NONE, 16, 1,
- msg, sizeof(*msg) + msg->len, true);
+ msg->src, msg->dst, msg->len, msg->flags, msg->reserved);
+#if defined(CONFIG_DYNAMIC_DEBUG)
+ dynamic_hex_dump("rpmsg_virtio RX: ", DUMP_PREFIX_NONE, 16, 1,
+ msg, sizeof(*msg) + msg->len, true);
+#endif
/*
* We currently use fixed-sized buffers, so trivially sanitize
* the reported payload length.
*/
if (len > RPMSG_BUF_SIZE ||
- msg->len > (len - sizeof(struct rpmsg_hdr))) {
+ msg->len > (len - sizeof(struct rpmsg_hdr))) {
dev_warn(dev, "inbound msg too big: (%d, %d)\n", len, msg->len);
return -EINVAL;
}
msgs_received++;
msg = virtqueue_get_buf(rvq, &len);
- };
+ }
dev_dbg(dev, "Received %u messages\n", msgs_received);
}
/* invoked when a name service announcement arrives */
-static void rpmsg_ns_cb(struct rpmsg_channel *rpdev, void *data, int len,
- void *priv, u32 src)
+static int rpmsg_ns_cb(struct rpmsg_device *rpdev, void *data, int len,
+ void *priv, u32 src)
{
struct rpmsg_ns_msg *msg = data;
- struct rpmsg_channel *newch;
+ struct rpmsg_device *newch;
struct rpmsg_channel_info chinfo;
struct virtproc_info *vrp = priv;
struct device *dev = &vrp->vdev->dev;
int ret;
- print_hex_dump(KERN_DEBUG, "NS announcement: ",
- DUMP_PREFIX_NONE, 16, 1,
- data, len, true);
+#if defined(CONFIG_DYNAMIC_DEBUG)
+ dynamic_hex_dump("NS announcement: ", DUMP_PREFIX_NONE, 16, 1,
+ data, len, true);
+#endif
if (len != sizeof(*msg)) {
dev_err(dev, "malformed ns msg (%d)\n", len);
- return;
+ return -EINVAL;
}
/*
*/
if (rpdev) {
dev_err(dev, "anomaly: ns ept has an rpdev handle\n");
- return;
+ return -EINVAL;
}
/* don't trust the remote processor for null terminating the name */
msg->name[RPMSG_NAME_SIZE - 1] = '\0';
dev_info(dev, "%sing channel %s addr 0x%x\n",
- msg->flags & RPMSG_NS_DESTROY ? "destroy" : "creat",
- msg->name, msg->addr);
+ msg->flags & RPMSG_NS_DESTROY ? "destroy" : "creat",
+ msg->name, msg->addr);
strncpy(chinfo.name, msg->name, sizeof(chinfo.name));
chinfo.src = RPMSG_ADDR_ANY;
chinfo.dst = msg->addr;
if (msg->flags & RPMSG_NS_DESTROY) {
- ret = rpmsg_destroy_channel(vrp, &chinfo);
+ ret = rpmsg_unregister_device(&vrp->vdev->dev, &chinfo);
if (ret)
dev_err(dev, "rpmsg_destroy_channel failed: %d\n", ret);
} else {
if (!newch)
dev_err(dev, "rpmsg_create_channel failed\n");
}
+
+ return 0;
}
static int rpmsg_probe(struct virtio_device *vdev)
goto vqs_del;
}
- dev_dbg(&vdev->dev, "buffers: va %p, dma 0x%llx\n", bufs_va,
- (unsigned long long)vrp->bufs_dma);
+ dev_dbg(&vdev->dev, "buffers: va %p, dma %pad\n",
+ bufs_va, &vrp->bufs_dma);
/* half of the buffers is dedicated for RX */
vrp->rbufs = bufs_va;
sg_init_one(&sg, cpu_addr, RPMSG_BUF_SIZE);
err = virtqueue_add_inbuf(vrp->rvq, &sg, 1, cpu_addr,
- GFP_KERNEL);
+ GFP_KERNEL);
WARN_ON(err); /* sanity check; this can't really happen */
}
{
int ret;
- ret = bus_register(&rpmsg_bus);
- if (ret) {
- pr_err("failed to register rpmsg bus: %d\n", ret);
- return ret;
- }
-
ret = register_virtio_driver(&virtio_ipc_driver);
- if (ret) {
+ if (ret)
pr_err("failed to register virtio driver: %d\n", ret);
- bus_unregister(&rpmsg_bus);
- }
return ret;
}
static void __exit rpmsg_fini(void)
{
unregister_virtio_driver(&virtio_ipc_driver);
- bus_unregister(&rpmsg_bus);
}
module_exit(rpmsg_fini);
const char *firmware;
const char *mbox_name;
const struct rproc_ops *ops;
- int (*device_enable) (struct platform_device *pdev);
- int (*device_shutdown) (struct platform_device *pdev);
- void(*set_bootaddr)(u32);
+ int (*device_enable)(struct platform_device *pdev);
+ int (*device_shutdown)(struct platform_device *pdev);
+ void (*set_bootaddr)(u32);
};
#if defined(CONFIG_OMAP_REMOTEPROC) || defined(CONFIG_OMAP_REMOTEPROC_MODULE)
RSC_LAST = 4,
};
-#define FW_RSC_ADDR_ANY (0xFFFFFFFFFFFFFFFF)
+#define FW_RSC_ADDR_ANY (-1)
/**
* struct fw_rsc_carveout - physically contiguous memory request
* @notifyid is a unique rproc-wide notify index for this vring. This notify
* index is used when kicking a remote processor, to let it know that this
* vring is triggered.
- * @reserved: reserved (must be zero)
+ * @pa: physical address
*
* This descriptor is not a resource entry by itself; it is part of the
* vdev resource type (see below).
u32 align;
u32 num;
u32 notifyid;
- u32 reserved;
+ u32 pa;
} __packed;
/**
* @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
* @has_iommu: flag to indicate if remote processor is behind an MMU
*/
struct rproc {
struct idr notifyids;
int index;
struct work_struct crash_handler;
- unsigned crash_cnt;
+ unsigned int crash_cnt;
struct completion crash_comp;
bool recovery_disabled;
int max_notifyid;
struct resource_table *table_ptr;
struct resource_table *cached_table;
- u32 table_csum;
bool has_iommu;
+ bool auto_boot;
};
/* we currently support only two vrings per rvdev */
struct rproc *rproc_get_by_phandle(phandle phandle);
struct rproc *rproc_alloc(struct device *dev, const char *name,
- const struct rproc_ops *ops,
- const char *firmware, int len);
+ const struct rproc_ops *ops,
+ const char *firmware, int len);
void rproc_put(struct rproc *rproc);
int rproc_add(struct rproc *rproc);
int rproc_del(struct rproc *rproc);
#include <linux/kref.h>
#include <linux/mutex.h>
-/* The feature bitmap for virtio rpmsg */
-#define VIRTIO_RPMSG_F_NS 0 /* RP supports name service notifications */
+#define RPMSG_ADDR_ANY 0xFFFFFFFF
+
+struct rpmsg_device;
+struct rpmsg_endpoint;
+struct rpmsg_device_ops;
+struct rpmsg_endpoint_ops;
/**
- * struct rpmsg_hdr - common header for all rpmsg messages
- * @src: source address
+ * struct rpmsg_channel_info - channel info representation
+ * @name: name of service
+ * @src: local address
* @dst: destination address
- * @reserved: reserved for future use
- * @len: length of payload (in bytes)
- * @flags: message flags
- * @data: @len bytes of message payload data
- *
- * Every message sent(/received) on the rpmsg bus begins with this header.
*/
-struct rpmsg_hdr {
+struct rpmsg_channel_info {
+ char name[RPMSG_NAME_SIZE];
u32 src;
u32 dst;
- u32 reserved;
- u16 len;
- u16 flags;
- u8 data[0];
-} __packed;
-
-/**
- * struct rpmsg_ns_msg - dynamic name service announcement message
- * @name: name of remote service that is published
- * @addr: address of remote service that is published
- * @flags: indicates whether service is created or destroyed
- *
- * This message is sent across to publish a new service, or announce
- * about its removal. When we receive these messages, an appropriate
- * rpmsg channel (i.e device) is created/destroyed. In turn, the ->probe()
- * or ->remove() handler of the appropriate rpmsg driver will be invoked
- * (if/as-soon-as one is registered).
- */
-struct rpmsg_ns_msg {
- char name[RPMSG_NAME_SIZE];
- u32 addr;
- u32 flags;
-} __packed;
-
-/**
- * enum rpmsg_ns_flags - dynamic name service announcement flags
- *
- * @RPMSG_NS_CREATE: a new remote service was just created
- * @RPMSG_NS_DESTROY: a known remote service was just destroyed
- */
-enum rpmsg_ns_flags {
- RPMSG_NS_CREATE = 0,
- RPMSG_NS_DESTROY = 1,
};
-#define RPMSG_ADDR_ANY 0xFFFFFFFF
-
-struct virtproc_info;
-
/**
- * rpmsg_channel - devices that belong to the rpmsg bus are called channels
- * @vrp: the remote processor this channel belongs to
+ * rpmsg_device - device that belong to the rpmsg bus
* @dev: the device struct
* @id: device id (used to match between rpmsg drivers and devices)
* @src: local address
* @ept: the rpmsg endpoint of this channel
* @announce: if set, rpmsg will announce the creation/removal of this channel
*/
-struct rpmsg_channel {
- struct virtproc_info *vrp;
+struct rpmsg_device {
struct device dev;
struct rpmsg_device_id id;
u32 src;
u32 dst;
struct rpmsg_endpoint *ept;
bool announce;
+
+ const struct rpmsg_device_ops *ops;
};
-typedef void (*rpmsg_rx_cb_t)(struct rpmsg_channel *, void *, int, void *, u32);
+typedef int (*rpmsg_rx_cb_t)(struct rpmsg_device *, void *, int, void *, u32);
/**
* struct rpmsg_endpoint - binds a local rpmsg address to its user
* create additional endpoints by themselves (see rpmsg_create_ept()).
*/
struct rpmsg_endpoint {
- struct rpmsg_channel *rpdev;
+ struct rpmsg_device *rpdev;
struct kref refcount;
rpmsg_rx_cb_t cb;
struct mutex cb_lock;
u32 addr;
void *priv;
+
+ const struct rpmsg_endpoint_ops *ops;
};
/**
struct rpmsg_driver {
struct device_driver drv;
const struct rpmsg_device_id *id_table;
- int (*probe)(struct rpmsg_channel *dev);
- void (*remove)(struct rpmsg_channel *dev);
- void (*callback)(struct rpmsg_channel *, void *, int, void *, u32);
+ int (*probe)(struct rpmsg_device *dev);
+ void (*remove)(struct rpmsg_device *dev);
+ int (*callback)(struct rpmsg_device *, void *, int, void *, u32);
};
-int register_rpmsg_device(struct rpmsg_channel *dev);
-void unregister_rpmsg_device(struct rpmsg_channel *dev);
+int register_rpmsg_device(struct rpmsg_device *dev);
+void unregister_rpmsg_device(struct rpmsg_device *dev);
int __register_rpmsg_driver(struct rpmsg_driver *drv, struct module *owner);
void unregister_rpmsg_driver(struct rpmsg_driver *drv);
void rpmsg_destroy_ept(struct rpmsg_endpoint *);
-struct rpmsg_endpoint *rpmsg_create_ept(struct rpmsg_channel *,
- rpmsg_rx_cb_t cb, void *priv, u32 addr);
-int
-rpmsg_send_offchannel_raw(struct rpmsg_channel *, u32, u32, void *, int, bool);
+struct rpmsg_endpoint *rpmsg_create_ept(struct rpmsg_device *,
+ rpmsg_rx_cb_t cb, void *priv,
+ struct rpmsg_channel_info chinfo);
/* use a macro to avoid include chaining to get THIS_MODULE */
#define register_rpmsg_driver(drv) \
module_driver(__rpmsg_driver, register_rpmsg_driver, \
unregister_rpmsg_driver)
-/**
- * rpmsg_send() - send a message across to the remote processor
- * @rpdev: the rpmsg channel
- * @data: payload of message
- * @len: length of payload
- *
- * This function sends @data of length @len on the @rpdev channel.
- * The message will be sent to the remote processor which the @rpdev
- * channel belongs to, using @rpdev's source and destination addresses.
- * In case there are no TX buffers available, the function will block until
- * one becomes available, or a timeout of 15 seconds elapses. When the latter
- * happens, -ERESTARTSYS is returned.
- *
- * Can only be called from process context (for now).
- *
- * Returns 0 on success and an appropriate error value on failure.
- */
-static inline int rpmsg_send(struct rpmsg_channel *rpdev, void *data, int len)
-{
- u32 src = rpdev->src, dst = rpdev->dst;
-
- return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, true);
-}
-
-/**
- * rpmsg_sendto() - send a message across to the remote processor, specify dst
- * @rpdev: the rpmsg channel
- * @data: payload of message
- * @len: length of payload
- * @dst: destination address
- *
- * This function sends @data of length @len to the remote @dst address.
- * The message will be sent to the remote processor which the @rpdev
- * channel belongs to, using @rpdev's source address.
- * In case there are no TX buffers available, the function will block until
- * one becomes available, or a timeout of 15 seconds elapses. When the latter
- * happens, -ERESTARTSYS is returned.
- *
- * Can only be called from process context (for now).
- *
- * Returns 0 on success and an appropriate error value on failure.
- */
-static inline
-int rpmsg_sendto(struct rpmsg_channel *rpdev, void *data, int len, u32 dst)
-{
- u32 src = rpdev->src;
-
- return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, true);
-}
-
-/**
- * rpmsg_send_offchannel() - send a message using explicit src/dst addresses
- * @rpdev: the rpmsg channel
- * @src: source address
- * @dst: destination address
- * @data: payload of message
- * @len: length of payload
- *
- * This function sends @data of length @len to the remote @dst address,
- * and uses @src as the source address.
- * The message will be sent to the remote processor which the @rpdev
- * channel belongs to.
- * In case there are no TX buffers available, the function will block until
- * one becomes available, or a timeout of 15 seconds elapses. When the latter
- * happens, -ERESTARTSYS is returned.
- *
- * Can only be called from process context (for now).
- *
- * Returns 0 on success and an appropriate error value on failure.
- */
-static inline
-int rpmsg_send_offchannel(struct rpmsg_channel *rpdev, u32 src, u32 dst,
- void *data, int len)
-{
- return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, true);
-}
-
-/**
- * rpmsg_send() - send a message across to the remote processor
- * @rpdev: the rpmsg channel
- * @data: payload of message
- * @len: length of payload
- *
- * This function sends @data of length @len on the @rpdev channel.
- * The message will be sent to the remote processor which the @rpdev
- * channel belongs to, using @rpdev's source and destination addresses.
- * In case there are no TX buffers available, the function will immediately
- * return -ENOMEM without waiting until one becomes available.
- *
- * Can only be called from process context (for now).
- *
- * Returns 0 on success and an appropriate error value on failure.
- */
-static inline
-int rpmsg_trysend(struct rpmsg_channel *rpdev, void *data, int len)
-{
- u32 src = rpdev->src, dst = rpdev->dst;
+int rpmsg_send(struct rpmsg_endpoint *ept, void *data, int len);
+int rpmsg_sendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst);
+int rpmsg_send_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst,
+ void *data, int len);
- return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, false);
-}
-
-/**
- * rpmsg_sendto() - send a message across to the remote processor, specify dst
- * @rpdev: the rpmsg channel
- * @data: payload of message
- * @len: length of payload
- * @dst: destination address
- *
- * This function sends @data of length @len to the remote @dst address.
- * The message will be sent to the remote processor which the @rpdev
- * channel belongs to, using @rpdev's source address.
- * In case there are no TX buffers available, the function will immediately
- * return -ENOMEM without waiting until one becomes available.
- *
- * Can only be called from process context (for now).
- *
- * Returns 0 on success and an appropriate error value on failure.
- */
-static inline
-int rpmsg_trysendto(struct rpmsg_channel *rpdev, void *data, int len, u32 dst)
-{
- u32 src = rpdev->src;
-
- return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, false);
-}
-
-/**
- * rpmsg_send_offchannel() - send a message using explicit src/dst addresses
- * @rpdev: the rpmsg channel
- * @src: source address
- * @dst: destination address
- * @data: payload of message
- * @len: length of payload
- *
- * This function sends @data of length @len to the remote @dst address,
- * and uses @src as the source address.
- * The message will be sent to the remote processor which the @rpdev
- * channel belongs to.
- * In case there are no TX buffers available, the function will immediately
- * return -ENOMEM without waiting until one becomes available.
- *
- * Can only be called from process context (for now).
- *
- * Returns 0 on success and an appropriate error value on failure.
- */
-static inline
-int rpmsg_trysend_offchannel(struct rpmsg_channel *rpdev, u32 src, u32 dst,
- void *data, int len)
-{
- return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, false);
-}
+int rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, int len);
+int rpmsg_trysendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst);
+int rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst,
+ void *data, int len);
#endif /* _LINUX_RPMSG_H */
#define MSG "hello world!"
#define MSG_LIMIT 100
-static void rpmsg_sample_cb(struct rpmsg_channel *rpdev, void *data, int len,
+struct instance_data {
+ int rx_count;
+};
+
+static int rpmsg_sample_cb(struct rpmsg_device *rpdev, void *data, int len,
void *priv, u32 src)
{
int ret;
- static int rx_count;
+ struct instance_data *idata = dev_get_drvdata(&rpdev->dev);
- dev_info(&rpdev->dev, "incoming msg %d (src: 0x%x)\n", ++rx_count, src);
+ dev_info(&rpdev->dev, "incoming msg %d (src: 0x%x)\n",
+ ++idata->rx_count, src);
print_hex_dump(KERN_DEBUG, __func__, DUMP_PREFIX_NONE, 16, 1,
data, len, true);
/* samples should not live forever */
- if (rx_count >= MSG_LIMIT) {
+ if (idata->rx_count >= MSG_LIMIT) {
dev_info(&rpdev->dev, "goodbye!\n");
- return;
+ return 0;
}
/* send a new message now */
- ret = rpmsg_send(rpdev, MSG, strlen(MSG));
+ ret = rpmsg_send(rpdev->ept, MSG, strlen(MSG));
if (ret)
dev_err(&rpdev->dev, "rpmsg_send failed: %d\n", ret);
+
+ return 0;
}
-static int rpmsg_sample_probe(struct rpmsg_channel *rpdev)
+static int rpmsg_sample_probe(struct rpmsg_device *rpdev)
{
int ret;
+ struct instance_data *idata;
dev_info(&rpdev->dev, "new channel: 0x%x -> 0x%x!\n",
rpdev->src, rpdev->dst);
+ idata = devm_kzalloc(&rpdev->dev, sizeof(*idata), GFP_KERNEL);
+ if (!idata)
+ return -ENOMEM;
+
+ dev_set_drvdata(&rpdev->dev, idata);
+
/* send a message to our remote processor */
- ret = rpmsg_send(rpdev, MSG, strlen(MSG));
+ ret = rpmsg_send(rpdev->ept, MSG, strlen(MSG));
if (ret) {
dev_err(&rpdev->dev, "rpmsg_send failed: %d\n", ret);
return ret;
return 0;
}
-static void rpmsg_sample_remove(struct rpmsg_channel *rpdev)
+static void rpmsg_sample_remove(struct rpmsg_device *rpdev)
{
dev_info(&rpdev->dev, "rpmsg sample client driver is removed\n");
}
projects / deliverable / linux.git / commitdiff
