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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Peng Fan When remote processor is booted by bootloader, Linux need to ignore firmware loading, and ignore remote processor start/stop related hardware operations. what should do is to need to handle memory-regions and resource table. Add a src_started entry to check whether Cortex-M4 is started for i.MX7D and i.MX6SX. Signed-off-by: Peng Fan --- drivers/remoteproc/imx_rproc.c | 240 +++++++++++++++++++++++++++++++++++++---- 1 file changed, 220 insertions(+), 20 deletions(-) diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c index 3e72b6f38d4b..b9fabe269fd2 100644 --- a/drivers/remoteproc/imx_rproc.c +++ b/drivers/remoteproc/imx_rproc.c @@ -74,6 +74,7 @@ struct imx_rproc_dcfg { u32 src_mask; u32 src_start; u32 src_stop; + u32 src_started; const struct imx_rproc_att *att; size_t att_size; }; @@ -85,6 +86,7 @@ struct imx_rproc { const struct imx_rproc_dcfg *dcfg; struct imx_rproc_mem mem[IMX7D_RPROC_MEM_MAX]; struct clk *clk; + bool early_boot; }; static const struct imx_rproc_att imx_rproc_att_imx7d[] = { @@ -142,6 +144,7 @@ static const struct imx_rproc_dcfg imx_rproc_cfg_imx7d = { .src_mask = IMX7D_M4_RST_MASK, .src_start = IMX7D_M4_START, .src_stop = IMX7D_M4_STOP, + .src_started = IMX7D_ENABLE_M4, .att = imx_rproc_att_imx7d, .att_size = ARRAY_SIZE(imx_rproc_att_imx7d), }; @@ -151,6 +154,7 @@ static const struct imx_rproc_dcfg imx_rproc_cfg_imx6sx = { .src_mask = IMX6SX_M4_RST_MASK, .src_start = IMX6SX_M4_START, .src_stop = IMX6SX_M4_STOP, + .src_started = IMX6SX_ENABLE_M4, .att = imx_rproc_att_imx6sx, .att_size = ARRAY_SIZE(imx_rproc_att_imx6sx), }; @@ -162,6 +166,9 @@ static int imx_rproc_start(struct rproc *rproc) struct device *dev = priv->dev; int ret; + if (priv->early_boot) + return 0; + ret = regmap_update_bits(priv->regmap, dcfg->src_reg, dcfg->src_mask, dcfg->src_start); if (ret) @@ -177,6 +184,9 @@ static int imx_rproc_stop(struct rproc *rproc) struct device *dev = priv->dev; int ret; + if (priv->early_boot) + return 0; + ret = regmap_update_bits(priv->regmap, dcfg->src_reg, dcfg->src_mask, dcfg->src_stop); if (ret) @@ -240,10 +250,167 @@ static void *imx_rproc_da_to_va(struct rproc *rproc, u64 da, int len) return va; } +static int imx_rproc_elf_load_segments(struct rproc *rproc, + const struct firmware *fw) +{ + struct imx_rproc *priv = rproc->priv; + + if (!priv->early_boot) + return rproc_elf_load_segments(rproc, fw); + + return 0; +} + +static int imx_rproc_mem_alloc(struct rproc *rproc, + struct rproc_mem_entry *mem) +{ + struct device *dev = rproc->dev.parent; + void *va; + + dev_dbg(dev, "map memory: %p+%x\n", &mem->dma, mem->len); + va = ioremap_wc(mem->dma, mem->len); + if (IS_ERR_OR_NULL(va)) { + dev_err(dev, "Unable to map memory region: %p+%x\n", + &mem->dma, mem->len); + return -ENOMEM; + } + + /* Update memory entry va */ + mem->va = va; + + return 0; +} + +static int imx_rproc_mem_release(struct rproc *rproc, + struct rproc_mem_entry *mem) +{ + dev_dbg(rproc->dev.parent, "unmap memory: %pa\n", &mem->dma); + iounmap(mem->va); + + return 0; +} + +static int imx_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw) +{ + struct imx_rproc *priv = rproc->priv; + struct resource_table *resource_table; + struct device_node *np = priv->dev->of_node; + struct of_phandle_iterator it; + struct rproc_mem_entry *mem; + struct reserved_mem *rmem; + int index = 0; + int elems; + int ret; + u64 da; + + if (!priv->early_boot) + return rproc_elf_load_rsc_table(rproc, fw); + + /* Register associated reserved memory regions */ + of_phandle_iterator_init(&it, np, "memory-region", NULL, 0); + while (of_phandle_iterator_next(&it) == 0) { + rmem = of_reserved_mem_lookup(it.node); + if (!rmem) { + dev_err(priv->dev, "unable to acquire memory-region\n"); + return -EINVAL; + } + + /* No need to translate pa to da */ + da = rmem->base; + + if (strcmp(it.node->name, "vdev0buffer")) { + /* Register memory region */ + mem = rproc_mem_entry_init(priv->dev, NULL, + (dma_addr_t)rmem->base, + rmem->size, da, + imx_rproc_mem_alloc, + imx_rproc_mem_release, + it.node->name); + + if (mem) + rproc_coredump_add_segment(rproc, da, + rmem->size); + } else { + /* Register reserved memory for vdev buffer alloc */ + mem = rproc_of_resm_mem_entry_init(priv->dev, index, + rmem->size, + rmem->base, + it.node->name); + } + + if (!mem) + return -ENOMEM; + + rproc_add_carveout(rproc, mem); + index++; + } + + /*Parse device tree to get resource table */ + elems = of_property_count_u32_elems(np, "rsrc-table"); + if (elems < 0) { + dev_err(&rproc->dev, "no rsrc-table\n"); + return elems; + } + + resource_table = kzalloc(elems * sizeof(u32), GFP_KERNEL); + if (!resource_table) + return PTR_ERR(resource_table); + + ret = of_property_read_u32_array(np, "rsrc-table", + (u32 *)resource_table, elems); + if (ret) + return ret; + + rproc->cached_table = resource_table; + rproc->table_ptr = resource_table; + rproc->table_sz = elems * sizeof(u32); + + return 0; +} + +static struct resource_table * +imx_rproc_elf_find_loaded_rsc_table(struct rproc *rproc, + const struct firmware *fw) +{ + struct imx_rproc *priv = rproc->priv; + + if (!priv->early_boot) + return rproc_elf_find_loaded_rsc_table(rproc, fw); + + return NULL; +} + +static int imx_rproc_elf_sanity_check(struct rproc *rproc, + const struct firmware *fw) +{ + struct imx_rproc *priv = rproc->priv; + + if (!priv->early_boot) + return rproc_elf_sanity_check(rproc, fw); + + return 0; +} + +static u32 imx_rproc_elf_get_boot_addr(struct rproc *rproc, + const struct firmware *fw) +{ + struct imx_rproc *priv = rproc->priv; + + if (!priv->early_boot) + return rproc_elf_get_boot_addr(rproc, fw); + + return 0; +} + static const struct rproc_ops imx_rproc_ops = { .start = imx_rproc_start, .stop = imx_rproc_stop, .da_to_va = imx_rproc_da_to_va, + .load = imx_rproc_elf_load_segments, + .parse_fw = imx_rproc_parse_fw, + .find_loaded_rsc_table = imx_rproc_elf_find_loaded_rsc_table, + .sanity_check = imx_rproc_elf_sanity_check, + .get_boot_addr = imx_rproc_elf_get_boot_addr, }; static int imx_rproc_addr_init(struct imx_rproc *priv, @@ -309,6 +476,31 @@ static int imx_rproc_addr_init(struct imx_rproc *priv, return 0; } +static int imx_rproc_configure_mode(struct imx_rproc *priv) +{ + const struct imx_rproc_dcfg *dcfg = priv->dcfg; + struct device *dev = priv->dev; + int ret; + u32 val; + + if (of_get_property(dev->of_node, "early-booted", NULL)) { + priv->early_boot = true; + } else { + ret = regmap_read(priv->regmap, dcfg->src_reg, &val); + if (ret) { + dev_err(dev, "Failed to read src\n"); + return ret; + } + + priv->early_boot = !!(val & dcfg->src_started); + } + + if (priv->early_boot) + priv->rproc->skip_fw_load = true; + + return 0; +} + static int imx_rproc_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -347,27 +539,33 @@ static int imx_rproc_probe(struct platform_device *pdev) dev_set_drvdata(dev, rproc); - ret = imx_rproc_addr_init(priv, pdev); - if (ret) { - dev_err(dev, "failed on imx_rproc_addr_init\n"); + ret = imx_rproc_configure_mode(priv); + if (ret) goto err_put_rproc; - } - priv->clk = devm_clk_get(dev, NULL); - if (IS_ERR(priv->clk)) { - dev_err(dev, "Failed to get clock\n"); - ret = PTR_ERR(priv->clk); - goto err_put_rproc; - } + if (!priv->early_boot) { + ret = imx_rproc_addr_init(priv, pdev); + if (ret) { + dev_err(dev, "failed on imx_rproc_addr_init\n"); + goto err_put_rproc; + } - /* - * clk for M4 block including memory. Should be - * enabled before .start for FW transfer. - */ - ret = clk_prepare_enable(priv->clk); - if (ret) { - dev_err(&rproc->dev, "Failed to enable clock\n"); - goto err_put_rproc; + priv->clk = devm_clk_get(dev, NULL); + if (IS_ERR(priv->clk)) { + dev_err(dev, "Failed to get clock\n"); + ret = PTR_ERR(priv->clk); + goto err_put_rproc; + } + + /* + * clk for M4 block including memory. Should be + * enabled before .start for FW transfer. + */ + ret = clk_prepare_enable(priv->clk); + if (ret) { + dev_err(&rproc->dev, "Failed to enable clock\n"); + goto err_put_rproc; + } } ret = rproc_add(rproc); @@ -379,7 +577,8 @@ static int imx_rproc_probe(struct platform_device *pdev) return 0; err_put_clk: - clk_disable_unprepare(priv->clk); + if (!priv->early_boot) + clk_disable_unprepare(priv->clk); err_put_rproc: rproc_free(rproc); @@ -391,7 +590,8 @@ static int imx_rproc_remove(struct platform_device *pdev) struct rproc *rproc = platform_get_drvdata(pdev); struct imx_rproc *priv = rproc->priv; - clk_disable_unprepare(priv->clk); + if (!priv->early_boot) + clk_disable_unprepare(priv->clk); rproc_del(rproc); rproc_free(rproc); -- 2.16.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel