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Mon, 11 May 2020 02:13:54 +0000 (GMT) From: Alim Akhtar To: robh@kernel.org Cc: devicetree@vger.kernel.org, linux-scsi@vger.kernel.org, krzk@kernel.org, avri.altman@wdc.com, martin.petersen@oracle.com, kwmad.kim@samsung.com, stanley.chu@mediatek.com, cang@codeaurora.org, linux-samsung-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Alim Akhtar Subject: [PATCH v8 04/10] scsi: ufs: introduce UFSHCD_QUIRK_PRDT_BYTE_GRAN quirk Date: Mon, 11 May 2020 07:30:25 +0530 Message-Id: <20200511020031.25730-5-alim.akhtar@samsung.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200511020031.25730-1-alim.akhtar@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA0WSeUwTURDGfbvb7bZaXQviQD0xRMVQD5SsNzEGN8ErRo1RAza6AuFqWrwP EOrVChZFIYqKilTqhbjQBjygFhA0xYSighIrKCoaVIiN91G2xv9+M/N975tMHoXL00UBVFxS CqdJUiUEklKi/O74sSGveGvUpLfO0YzrdDnJvP3aTDI914pEzBm7Q8Q0NpaImRa+hmBKOx6J mKaKfJLJa7yNMYbHVpIx1f3CmN83rWLmQlkLCpexTVmZGFtqPkiyNwpTWV39HYL99KqVYLN4 M2J7S0ew+6sM2FJqtXTWBi4hbjOnmThnnTT2049yXG0ZsjVP1yxOQ22D9UhCAT0VrtYXER6W 05UIGjPG6JH0L/cgKPniJIXCjcB+sAv/57jyqNM7uIWg8uRzJBQ6DB6015MeFUlPgLZcHvOw L+0Ddvc+5GGcfoKBq3i+HlGUD70MjKfGedoEHQSHjlzuW0NGzwKL5bBYCBsJl0qq+oIl9Gw4 nmYhPFlA76XA+ew8IYjmw/fbdq/BB7rqeC8HQG/3LdKTBXQ8HKoIFdo74cLpWq91LlQ58wmP BKfHw7WKicKWAyHz+0tMcMrgwD65oA6CjO5mr1MB2QaDSGAWGtqLxMIVjAgePrQgIxp+4v+r BQiZkT+n1ibGcNpp6tAkbotSq0rUbkqKUa5PTixFfd8kONKK2l0flTaEUciGgMIDfWWmRGuU XLZBtW07p0mO1mxK4LQ2pKCIwKGyjj18lJyOUaVw8Ryn5jT/phglCUjDBrvDsyKMTkf5kJyb 10cvS88x+azrXlxbrXSbJkyqG+XvT4rGZHeOcoszM3rttv6p5qOGvMJF74tDG8JjCynFLsPc J5/XXH2z8s2lSqtJYZ6mCsutOZUa/XOQ6efCpjX6jBA2ZFFE7ccI8bglMzbG890134xl+sie 6i8j+z3I0QdVNkzHV10/9uJ9Qeix1+fhZNxju3lq15T7uzouRraN3XnuxbwFr51pHxZ3tvjl Eo5VufkD3kHxwrN+Vam8Yo5DsrwteNjarXd8hw4L4Ir4zRK/Aoce+LCWHa3BFl56ZJsxOd3l Qq1heLTtpXrFDUyasrZQ2Vqtu/f09+4r6pkry3SBhDZWNTkY12hVfwCxpD2RlQMAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrMLMWRmVeSWpSXmKPExsWy7bCSvO6TLTviDG5MMrd4MG8bm8XLn1fZ LD6tX8ZqMf/IOVaL8+c3sFvc3HKUxWLT42usFpd3zWGzmHF+H5NF9/UdbBbLj/9jsvi/Zwe7 xdKtNxkdeD0u9/UyeWxa1cnmsXlJvUfLyf0sHh+f3mLx6NuyitHj8yY5j/YD3UwBHFFcNimp OZllqUX6dglcGR//bGMu2C5aMaPlKnsD413BLkZODgkBE4m1156xdTFycQgJ7GaU6Li5gxki IS1xfeMEdghbWGLlv+fsEEVNTBKNv5tZQBJsAtoSd6dvYQKxRYCKjnxrYwSxmQWeMUmcelgK YgsLBEgs/T0frJ5FQFWiZ9IaMJtXwEZi+/Z+qAXyEqs3HABbzClgKzGtYTtYjRBQzYxNm1kn MPItYGRYxSiZWlCcm55bbFhgmJdarlecmFtcmpeul5yfu4kRHM5amjsYt6/6oHeIkYmD8RCj BAezkgjv8twdcUK8KYmVValF+fFFpTmpxYcYpTlYlMR5bxQujBMSSE8sSc1OTS1ILYLJMnFw SjUw+S/ID024fTtx+YEF5h0rNi07kB2yvYarWlpf36abY/XZH0cUD57LPr5y4xyf27vEOP2b nsgkPan0nbb0j/w7xdhH/v4lcRNWxrhM158+M2WfxoW3666odd3a2m7ewrDd0yCSIyVQK/Hy /aWCtVYb62b4mHXcOd3AfGWJT6fclbgbSsyH18nVK7yQ+ZbuG25vwnxrfnmT+NosRRte+VwZ DimjU4ftw7bsPH670KB0qmvLi09MfzhuH0jUXWhd0mrzpbzo5rFevb/imcEyfTwfpr0yPK3Q uULzSqyg6dzQGdcfuugJNKw+PdXF5LbfO16V5wE56bpMM/tV1FclPso46G+21VVcWDjWZpvC 5QYlluKMREMt5qLiRACW9gw11gIAAA== X-CMS-MailID: 20200511021357epcas5p31ca197c25742a50359b076f10d4938cd X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" CMS-TYPE: 105P X-CMS-RootMailID: 20200511021357epcas5p31ca197c25742a50359b076f10d4938cd References: <20200511020031.25730-1-alim.akhtar@samsung.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Some UFS host controllers like Exynos uses granularities of PRDT length and offset as bytes, whereas others uses actual segment count. Reviewed-by: Avri Altman Signed-off-by: Kiwoong Kim Signed-off-by: Alim Akhtar --- drivers/scsi/ufs/ufshcd.c | 30 +++++++++++++++++++++++------- drivers/scsi/ufs/ufshcd.h | 6 ++++++ 2 files changed, 29 insertions(+), 7 deletions(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index ee30ed6cc805..ba093d0d0942 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -2151,8 +2151,14 @@ static int ufshcd_map_sg(struct ufs_hba *hba, struct ufshcd_lrb *lrbp) return sg_segments; if (sg_segments) { - lrbp->utr_descriptor_ptr->prd_table_length = - cpu_to_le16((u16)sg_segments); + + if (hba->quirks & UFSHCD_QUIRK_PRDT_BYTE_GRAN) + lrbp->utr_descriptor_ptr->prd_table_length = + cpu_to_le16((sg_segments * + sizeof(struct ufshcd_sg_entry))); + else + lrbp->utr_descriptor_ptr->prd_table_length = + cpu_to_le16((u16) (sg_segments)); prd_table = (struct ufshcd_sg_entry *)lrbp->ucd_prdt_ptr; @@ -3500,11 +3506,21 @@ static void ufshcd_host_memory_configure(struct ufs_hba *hba) cpu_to_le32(upper_32_bits(cmd_desc_element_addr)); /* Response upiu and prdt offset should be in double words */ - utrdlp[i].response_upiu_offset = - cpu_to_le16(response_offset >> 2); - utrdlp[i].prd_table_offset = cpu_to_le16(prdt_offset >> 2); - utrdlp[i].response_upiu_length = - cpu_to_le16(ALIGNED_UPIU_SIZE >> 2); + if (hba->quirks & UFSHCD_QUIRK_PRDT_BYTE_GRAN) { + utrdlp[i].response_upiu_offset = + cpu_to_le16(response_offset); + utrdlp[i].prd_table_offset = + cpu_to_le16(prdt_offset); + utrdlp[i].response_upiu_length = + cpu_to_le16(ALIGNED_UPIU_SIZE); + } else { + utrdlp[i].response_upiu_offset = + cpu_to_le16(response_offset >> 2); + utrdlp[i].prd_table_offset = + cpu_to_le16(prdt_offset >> 2); + utrdlp[i].response_upiu_length = + cpu_to_le16(ALIGNED_UPIU_SIZE >> 2); + } ufshcd_init_lrb(hba, &hba->lrb[i], i); } diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index f8d08cb9caf7..a9b9ace9fc72 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -535,6 +535,12 @@ enum ufshcd_quirks { * enabled via HCE register. */ UFSHCI_QUIRK_BROKEN_HCE = 1 << 8, + + /* + * This quirk needs to be enabled if the host controller regards + * resolution of the values of PRDTO and PRDTL in UTRD as byte. + */ + UFSHCD_QUIRK_PRDT_BYTE_GRAN = 1 << 9, }; enum ufshcd_caps { -- 2.17.1