From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Loic Pallardy Subject: [PATCH v1 2/3] remoteproc: st: add da to va support Date: Wed, 7 Dec 2016 21:33:45 +0100 Message-ID: <1481142826-15528-3-git-send-email-loic.pallardy@st.com> In-Reply-To: <1481142826-15528-1-git-send-email-loic.pallardy@st.com> References: <1481142826-15528-1-git-send-email-loic.pallardy@st.com> MIME-Version: 1.0 Content-Type: text/plain To: bjorn.andersson@linaro.org, ohad@wizery.com, lee.jones@linaro.org, patrice.chotard@st.com Cc: loic.pallardy@st.com, linux-remoteproc@vger.kernel.org, kernel@stlinux.com List-ID: ST remoteproc driver needs to provide information about carveout memory region to allow remoteproc core to load firmware and access trace buffer. Signed-off-by: Loic Pallardy --- drivers/remoteproc/st_remoteproc.c | 42 ++++++++++++++++++++++++++++++++------ 1 file changed, 36 insertions(+), 6 deletions(-) diff --git a/drivers/remoteproc/st_remoteproc.c b/drivers/remoteproc/st_remoteproc.c index 113caf2..51199a8 100644 --- a/drivers/remoteproc/st_remoteproc.c +++ b/drivers/remoteproc/st_remoteproc.c @@ -21,6 +21,7 @@ #include #include #include +#include #include #include #include @@ -52,6 +53,10 @@ struct st_rproc { struct regmap *boot_base; u32 boot_offset; struct mbox_chan *mbox_chan[ST_RPROC_MAX_VRING][MBOX_MAX]; + phys_addr_t mem_phys; + phys_addr_t mem_reloc; + void *mem_region; + size_t mem_size; }; static void st_rproc_mbox_callback(struct device *dev, u32 msg) @@ -156,10 +161,23 @@ static int st_rproc_stop(struct rproc *rproc) return sw_err ?: pwr_err; } +static void *st_proc_da_to_va(struct rproc *rproc, u64 da, int len) +{ + struct st_rproc *ddata = rproc->priv; + int offset; + + offset = da - ddata->mem_reloc; + if (offset < 0 || offset + len > ddata->mem_size) + return NULL; + + return ddata->mem_region + offset; +} + static struct rproc_ops st_rproc_ops = { .kick = st_rproc_kick, .start = st_rproc_start, .stop = st_rproc_stop, + .da_to_va = st_proc_da_to_va, }; /* @@ -207,7 +225,8 @@ static int st_rproc_parse_dt(struct platform_device *pdev) struct device *dev = &pdev->dev; struct rproc *rproc = platform_get_drvdata(pdev); struct st_rproc *ddata = rproc->priv; - struct device_node *np = dev->of_node; + struct device_node *np = dev->of_node, *node; + struct resource res; int err; if (ddata->config->sw_reset) { @@ -251,10 +270,23 @@ static int st_rproc_parse_dt(struct platform_device *pdev) return -EINVAL; } - err = of_reserved_mem_device_init(dev); - if (err) { - dev_err(dev, "Failed to obtain shared memory\n"); + node = of_parse_phandle(np, "memory-region", 0); + if (!node) { + dev_err(dev, "No memory-region specified\n"); + return -EINVAL; + } + + err = of_address_to_resource(node, 0, &res); + if (err) return err; + + ddata->mem_phys = ddata->mem_reloc = res.start; + ddata->mem_size = resource_size(&res); + ddata->mem_region = devm_ioremap_wc(dev, ddata->mem_phys, ddata->mem_size); + if (!ddata->mem_region) { + dev_err(dev, "Unable to map memory region: %pa+%zx\n", + &res.start, ddata->mem_size); + return -EBUSY; } err = clk_prepare(ddata->clk); @@ -391,8 +423,6 @@ static int st_rproc_remove(struct platform_device *pdev) clk_disable_unprepare(ddata->clk); - of_reserved_mem_device_release(&pdev->dev); - mbox_free_channel(ddata->mbox_chan[0][MBOX_RX]); mbox_free_channel(ddata->mbox_chan[1][MBOX_RX]); mbox_free_channel(ddata->mbox_chan[0][MBOX_TX]); -- 1.9.1