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[95.91.238.60]) by smtp.gmail.com with ESMTPSA id i8sm42177432wro.47.2020.01.18.16.14.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 18 Jan 2020 16:14:14 -0800 (PST) From: Bean Huo To: alim.akhtar@samsung.com, avri.altman@wdc.com, asutoshd@codeaurora.org, jejb@linux.ibm.com, martin.petersen@oracle.com, stanley.chu@mediatek.com, beanhuo@micron.com, bvanassche@acm.org, tomas.winkler@intel.com, cang@codeaurora.org Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 7/8] scsi: ufs: Add max_lu_supported in struct ufs_dev_info Date: Sun, 19 Jan 2020 01:13:26 +0100 Message-Id: <20200119001327.29155-8-huobean@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200119001327.29155-1-huobean@gmail.com> References: <20200119001327.29155-1-huobean@gmail.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Bean Huo Add one new parameter max_lu_supported in struct ufs_dev_info, which will be used to express exactly how many general LUs being supported by UFS device, and initialize it during booting stage. This patch also adds a new function ufshcd_init_device_geo_params() for initialization of UFS device geometry descriptor related parameters. Reviewed-by: Asutosh Das Signed-off-by: Bean Huo --- drivers/scsi/ufs/ufs.h | 2 ++ drivers/scsi/ufs/ufshcd.c | 41 +++++++++++++++++++++++++++++++++++++-- 2 files changed, 41 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/ufs/ufs.h b/drivers/scsi/ufs/ufs.h index fcc9b4d4e56f..c982bcc94662 100644 --- a/drivers/scsi/ufs/ufs.h +++ b/drivers/scsi/ufs/ufs.h @@ -530,6 +530,8 @@ struct ufs_dev_info { bool f_power_on_wp_en; /* Keeps information if any of the LU is power on write protected */ bool is_lu_power_on_wp; + /* Maximum number of general LU supported by the UFS device */ + u8 max_lu_supported; u16 wmanufacturerid; /*UFS device Product Name */ u8 *model; diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 4f8fcbb5f92e..dd10558f4d01 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -6858,6 +6858,37 @@ static void ufshcd_init_desc_sizes(struct ufs_hba *hba) hba->desc_size.hlth_desc = QUERY_DESC_HEALTH_DEF_SIZE; } +static int ufshcd_init_device_geo_params(struct ufs_hba *hba) +{ + int err; + size_t buff_len; + u8 *desc_buf; + + buff_len = hba->desc_size.geom_desc; + desc_buf = kmalloc(buff_len, GFP_KERNEL); + if (!desc_buf) { + err = -ENOMEM; + goto out; + } + + err = ufshcd_read_desc(hba, QUERY_DESC_IDN_GEOMETRY, 0, + desc_buf, buff_len); + if (err) { + dev_err(hba->dev, "%s: Failed reading Geometry Desc. err = %d\n", + __func__, err); + goto out; + } + + if (desc_buf[GEOMETRY_DESC_PARAM_MAX_NUM_LUN] == 1) + hba->dev_info.max_lu_supported = 32; + else if (desc_buf[GEOMETRY_DESC_PARAM_MAX_NUM_LUN] == 0) + hba->dev_info.max_lu_supported = 8; + +out: + kfree(desc_buf); + return err; +} + static struct ufs_ref_clk ufs_ref_clk_freqs[] = { {19200000, REF_CLK_FREQ_19_2_MHZ}, {26000000, REF_CLK_FREQ_26_MHZ}, @@ -6931,9 +6962,17 @@ static int ufshcd_init_params(struct ufs_hba *hba) bool flag; int ret; + /* Clear any previous UFS device information */ + memset(&hba->dev_info, 0, sizeof(hba->dev_info)); + /* Init check for device descriptor sizes */ ufshcd_init_desc_sizes(hba); + /* Init UFS geometry descriptor related parameters */ + ret = ufshcd_init_device_geo_params(hba); + if (ret) + goto out; + /* Check and apply UFS device quirks */ ret = ufs_get_device_desc(hba); if (ret) { @@ -6944,8 +6983,6 @@ static int ufshcd_init_params(struct ufs_hba *hba) ufs_fixup_device_setup(hba); - /* Clear any previous UFS device information */ - memset(&hba->dev_info, 0, sizeof(hba->dev_info)); if (!ufshcd_query_flag_retry(hba, UPIU_QUERY_OPCODE_READ_FLAG, QUERY_FLAG_IDN_PWR_ON_WPE, &flag)) hba->dev_info.f_power_on_wp_en = flag; -- 2.17.1