linux-kernel - [PATCH V2 2/2] remoteproc: imx_dsp_rproc: use common rproc_elf_load

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Message-Id: <20220413033038.1715945-3-peng.fan@oss.nxp.com>
Date:   Wed, 13 Apr 2022 11:30:38 +0800
From:   "Peng Fan (OSS)" <peng.fan@....nxp.com>
To:     bjorn.andersson@...aro.org, mathieu.poirier@...aro.org
Cc:     shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
        festevam@...il.com, linux-imx@....com,
        linux-remoteproc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        shengjiu.wang@....com, Peng Fan <peng.fan@....com>,
        Daniel Baluta <daniel.baluta@....com>
Subject: [PATCH V2 2/2] remoteproc: imx_dsp_rproc: use common rproc_elf_load_segments

From: Peng Fan <peng.fan@....com>

remoteproc elf loader supports the specific case that segments
have PT_LOAD and memsz/filesz set to zero, so no duplicate
code.

Acked-by: Daniel Baluta <daniel.baluta@....com>
Reviewed-by: Mathieu Poirier <mathieu.poirier@...aro.org>
Signed-off-by: Peng Fan <peng.fan@....com>
---
 drivers/remoteproc/imx_dsp_rproc.c | 95 +-----------------------------
 1 file changed, 1 insertion(+), 94 deletions(-)

diff --git a/drivers/remoteproc/imx_dsp_rproc.c b/drivers/remoteproc/imx_dsp_rproc.c
index 2abee78df96e..eee3c44c2146 100644
--- a/drivers/remoteproc/imx_dsp_rproc.c
+++ b/drivers/remoteproc/imx_dsp_rproc.c
@@ -649,99 +649,6 @@ static int imx_dsp_rproc_add_carveout(struct imx_dsp_rproc *priv)
 	return 0;
 }
 
-/**
- * imx_dsp_rproc_elf_load_segments() - load firmware segments to memory
- * @rproc: remote processor which will be booted using these fw segments
- * @fw: the ELF firmware image
- *
- * This function specially checks if memsz is zero or not, otherwise it
- * is mostly same as rproc_elf_load_segments().
- */
-static int imx_dsp_rproc_elf_load_segments(struct rproc *rproc,
-					   const struct firmware *fw)
-{
-	struct device *dev = &rproc->dev;
-	u8 class = fw_elf_get_class(fw);
-	u32 elf_phdr_get_size = elf_size_of_phdr(class);
-	const u8 *elf_data = fw->data;
-	const void *ehdr, *phdr;
-	int i, ret = 0;
-	u16 phnum;
-
-	ehdr = elf_data;
-	phnum = elf_hdr_get_e_phnum(class, ehdr);
-	phdr = elf_data + elf_hdr_get_e_phoff(class, ehdr);
-
-	/* go through the available ELF segments */
-	for (i = 0; i < phnum; i++, phdr += elf_phdr_get_size) {
-		u64 da = elf_phdr_get_p_paddr(class, phdr);
-		u64 memsz = elf_phdr_get_p_memsz(class, phdr);
-		u64 filesz = elf_phdr_get_p_filesz(class, phdr);
-		u64 offset = elf_phdr_get_p_offset(class, phdr);
-		u32 type = elf_phdr_get_p_type(class, phdr);
-		void *ptr;
-
-		/*
-		 *  There is a case that with PT_LOAD type, the
-		 *  filesz = memsz = 0. If memsz = 0, rproc_da_to_va
-		 *  should return NULL ptr, then error is returned.
-		 *  So this case should be skipped from the loop.
-		 *  Add !memsz checking here.
-		 */
-		if (type != PT_LOAD || !memsz)
-			continue;
-
-		dev_dbg(dev, "phdr: type %d da 0x%llx memsz 0x%llx filesz 0x%llx\n",
-			type, da, memsz, filesz);
-
-		if (filesz > memsz) {
-			dev_err(dev, "bad phdr filesz 0x%llx memsz 0x%llx\n",
-				filesz, memsz);
-			ret = -EINVAL;
-			break;
-		}
-
-		if (offset + filesz > fw->size) {
-			dev_err(dev, "truncated fw: need 0x%llx avail 0x%zx\n",
-				offset + filesz, fw->size);
-			ret = -EINVAL;
-			break;
-		}
-
-		if (!rproc_u64_fit_in_size_t(memsz)) {
-			dev_err(dev, "size (%llx) does not fit in size_t type\n",
-				memsz);
-			ret = -EOVERFLOW;
-			break;
-		}
-
-		/* grab the kernel address for this device address */
-		ptr = rproc_da_to_va(rproc, da, memsz, NULL);
-		if (!ptr) {
-			dev_err(dev, "bad phdr da 0x%llx mem 0x%llx\n", da,
-				memsz);
-			ret = -EINVAL;
-			break;
-		}
-
-		/* put the segment where the remote processor expects it */
-		if (filesz)
-			memcpy(ptr, elf_data + offset, filesz);
-
-		/*
-		 * Zero out remaining memory for this segment.
-		 *
-		 * This isn't strictly required since dma_alloc_coherent already
-		 * did this for us. albeit harmless, we may consider removing
-		 * this.
-		 */
-		if (memsz > filesz)
-			memset(ptr + filesz, 0, memsz - filesz);
-	}
-
-	return ret;
-}
-
 /* Prepare function for rproc_ops */
 static int imx_dsp_rproc_prepare(struct rproc *rproc)
 {
@@ -808,7 +715,7 @@ static const struct rproc_ops imx_dsp_rproc_ops = {
 	.start		= imx_dsp_rproc_start,
 	.stop		= imx_dsp_rproc_stop,
 	.kick		= imx_dsp_rproc_kick,
-	.load		= imx_dsp_rproc_elf_load_segments,
+	.load		= rproc_elf_load_segments,
 	.parse_fw	= rproc_elf_load_rsc_table,
 	.sanity_check	= rproc_elf_sanity_check,
 	.get_boot_addr	= rproc_elf_get_boot_addr,
-- 
2.25.1