From patchwork Wed Mar 5 16:38:14 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sudeep Holla X-Patchwork-Id: 871750 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 8C82825486F; Wed, 5 Mar 2025 16:39:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741192755; cv=none; b=R1OBmHvisQoEAOUyIQ7pS49W/qC0XZQAH17mvEf+ZP4cpiU1b241PdipNiKDDHwNMt1DY0qFYJaZ6/tr9IyGvKWB2JOb8lgvQr9Ivmmf4bRHbQkPX49KbEM+sW2OVOYwFuqvYZubigzypgjU4eHWXXFbmkulpWu3jfPbuOqaG7I= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741192755; c=relaxed/simple; bh=MfSTY+8Javma4iMKIMRIP5AOm3S32ksYO4b7JbopmcE=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=ZKEcN2XFyYasAm0sjVH/mqOqhPVUuXz0tNCAJtKNwFn0Q3N6gfHLbaJQ30zybx7XnTP6VwB3fy+pzkUKZFAgp0JGUeyTuIp1awk3bME0zsmoue6k48EblEUo8VNeDH0DpWBxctCBMqAORP5+lDNZZlQPeJ+Q65mPqd0vWXZi8IY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id A1AC51007; Wed, 5 Mar 2025 08:39:26 -0800 (PST) Received: from e133711.arm.com (e133711.arm.com [10.1.196.55]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id E6B5E3F5A1; Wed, 5 Mar 2025 08:39:11 -0800 (PST) From: Sudeep Holla Date: Wed, 05 Mar 2025 16:38:14 +0000 Subject: [PATCH v2 10/13] i2c: xgene-slimpro: Simplify PCC shared memory region handling Precedence: bulk X-Mailing-List: linux-i2c@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250305-pcc_fixes_updates-v2-10-1b1822bc8746@arm.com> References: <20250305-pcc_fixes_updates-v2-0-1b1822bc8746@arm.com> In-Reply-To: <20250305-pcc_fixes_updates-v2-0-1b1822bc8746@arm.com> To: linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Sudeep Holla , Jassi Brar , Huisong Li , Adam Young , Robbie King , Andi Shyti , linux-i2c@vger.kernel.org X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=3735; i=sudeep.holla@arm.com; h=from:subject:message-id; bh=MfSTY+8Javma4iMKIMRIP5AOm3S32ksYO4b7JbopmcE=; b=owEBbQKS/ZANAwAIAQBBurwxfuKYAcsmYgBnyH4fuQ/p52TMxH4kREmbxc+kI+v0j0xs9/n7J 5SYxHwMSY+JAjMEAAEIAB0WIQS6ceUSBvMeskPdk+EAQbq8MX7imAUCZ8h+HwAKCRAAQbq8MX7i mEP2D/9cWzppq3ezDm0HK2NUFbba9LDVfpaeSSrXX3TJS9Ap4RFjYJp5LzBRGDHPRRP/lemSb7h szcfRa62vnzQ5GIewqbwjQ56SF7FevbCdRwlM72Uzji85XjFSaO/SxKUuhyL9ykO2CV1MZ4Mj7T WEkdR/uTqugGKZYc3HU6zQqrkLp+R5GTleH1uUZ/9wXa0XKzYUx1fi/IOXet6oKhGZFtdpjb51Q iLbNfMQHQJRr6P4ylIxqfoga2hkeAUN1+8qcznMYo5DYqJiBLKifBhXXegx6r9b9y/lmzB5geL7 slxVB80clkZD0m8sQ4PMXOmpHTE4bdy+Th0apQw54sIt2IZpXQo9qX8BJ9mLrMTZnAyDbhyw9FD TFHj9mIGIIRzVw0fkY8TGJfYDE0Pb0m1N/TBJyLeW7wXjKZp12YJ3aGl7KC063+NQ5eQXIrtevs l03USS6us51zDUA+Q+xwQ8mmofRtKFvs5iAWVLuhKiLr9utT2w0W1RAgDw4+dWCItt7+kHmpTX2 oCRiV9NTMUqT+6BZ/n7ln2ajXNdq3mj1lvjt34OJNR6G5TplSC+P6IZI9WyqW8K56x/Uf9evuND 8yv+T4JH9/pRBnjsGeft+4iq5dT4xNiXv+vpxaQlTf+BmKMkyc0b1pnGc+zuP1YBlR8ZP+na09s zXz3oGWOahB9T7w== X-Developer-Key: i=sudeep.holla@arm.com; a=openpgp; fpr=7360A21742ADF5A11767C1C139CFD4755FE2D5B4 The PCC driver now handles mapping and unmapping of shared memory areas as part of pcc_mbox_{request,free}_channel(). Without these before, this xgene-slimpro I2C driver did handling of those mappings like several other PCC mailbox client drivers. There were redundant operations, leading to unnecessary code. Maintaining the consistency across these driver was harder due to scattered handling of shmem. Just use the mapped shmem and remove all redundant operations from this driver. Cc: Andi Shyti Cc: linux-i2c@vger.kernel.org Signed-off-by: Sudeep Holla --- drivers/i2c/busses/i2c-xgene-slimpro.c | 39 ++++------------------------------ 1 file changed, 4 insertions(+), 35 deletions(-) diff --git a/drivers/i2c/busses/i2c-xgene-slimpro.c b/drivers/i2c/busses/i2c-xgene-slimpro.c index 663fe5604dd64b80e57f906e1f7430dcf6d5e95b..a0880f4a056d2b8abbac9f58416215a7fc9b130e 100644 --- a/drivers/i2c/busses/i2c-xgene-slimpro.c +++ b/drivers/i2c/busses/i2c-xgene-slimpro.c @@ -101,8 +101,6 @@ struct slimpro_i2c_dev { struct completion rd_complete; u8 dma_buffer[I2C_SMBUS_BLOCK_MAX + 1]; /* dma_buffer[0] is used for length */ u32 *resp_msg; - phys_addr_t comm_base_addr; - void *pcc_comm_addr; }; #define to_slimpro_i2c_dev(cl) \ @@ -148,7 +146,8 @@ static void slimpro_i2c_rx_cb(struct mbox_client *cl, void *mssg) static void slimpro_i2c_pcc_rx_cb(struct mbox_client *cl, void *msg) { struct slimpro_i2c_dev *ctx = to_slimpro_i2c_dev(cl); - struct acpi_pcct_shared_memory *generic_comm_base = ctx->pcc_comm_addr; + struct acpi_pcct_shared_memory __iomem *generic_comm_base = + ctx->pcc_chan->shmem; /* Check if platform sends interrupt */ if (!xgene_word_tst_and_clr(&generic_comm_base->status, @@ -169,7 +168,8 @@ static void slimpro_i2c_pcc_rx_cb(struct mbox_client *cl, void *msg) static void slimpro_i2c_pcc_tx_prepare(struct slimpro_i2c_dev *ctx, u32 *msg) { - struct acpi_pcct_shared_memory *generic_comm_base = ctx->pcc_comm_addr; + struct acpi_pcct_shared_memory __iomem *generic_comm_base = + ctx->pcc_chan->shmem; u32 *ptr = (void *)(generic_comm_base + 1); u16 status; int i; @@ -464,15 +464,12 @@ static int xgene_slimpro_i2c_probe(struct platform_device *pdev) } else { struct pcc_mbox_chan *pcc_chan; const struct acpi_device_id *acpi_id; - int version = XGENE_SLIMPRO_I2C_V1; acpi_id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev); if (!acpi_id) return -EINVAL; - version = (int)acpi_id->driver_data; - if (device_property_read_u32(&pdev->dev, "pcc-channel", &ctx->mbox_idx)) ctx->mbox_idx = MAILBOX_I2C_INDEX; @@ -494,34 +491,6 @@ static int xgene_slimpro_i2c_probe(struct platform_device *pdev) goto mbox_err; } - /* - * This is the shared communication region - * for the OS and Platform to communicate over. - */ - ctx->comm_base_addr = pcc_chan->shmem_base_addr; - if (ctx->comm_base_addr) { - if (version == XGENE_SLIMPRO_I2C_V2) - ctx->pcc_comm_addr = memremap( - ctx->comm_base_addr, - pcc_chan->shmem_size, - MEMREMAP_WT); - else - ctx->pcc_comm_addr = memremap( - ctx->comm_base_addr, - pcc_chan->shmem_size, - MEMREMAP_WB); - } else { - dev_err(&pdev->dev, "Failed to get PCC comm region\n"); - rc = -ENOENT; - goto mbox_err; - } - - if (!ctx->pcc_comm_addr) { - dev_err(&pdev->dev, - "Failed to ioremap PCC comm region\n"); - rc = -ENOMEM; - goto mbox_err; - } } rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); if (rc)