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Bottomley" , Matthias Brugger , "Jinyoung Choi" , Kiwoong Kim , "open list" , "moderated list:ARM/Mediatek SoC support" , "moderated list:ARM/Mediatek SoC support" Subject: [PATCH v1 01/16] ufs: core: Probe for ext_iid support Date: Thu, 22 Sep 2022 18:05:08 -0700 Message-ID: X-Mailer: git-send-email 2.7.4 In-Reply-To: References: MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nasanex01a.na.qualcomm.com (10.52.223.231) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: ePRIkcpIpq9JAtOihC-6g9K_7n2cCjtz X-Proofpoint-GUID: ePRIkcpIpq9JAtOihC-6g9K_7n2cCjtz X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.528,FMLib:17.11.122.1 definitions=2022-09-22_16,2022-09-22_02,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 lowpriorityscore=0 suspectscore=0 bulkscore=0 priorityscore=1501 spamscore=0 impostorscore=0 phishscore=0 clxscore=1015 adultscore=0 mlxscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2209130000 definitions=main-2209230005 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220922_180634_368192_CCE7E0B0 X-CRM114-Status: GOOD ( 25.48 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Task Tag is limited to 8 bits and this restricts the number of active IOs to 255. In Multi-circular queue mode, this may not be enough. The specification provides EXT_IID which can be used to increase the number of IOs if the UFS device and UFSHC support it. This patch adds support to probe for ext_iid support in ufs device and UFSHC. Co-developed-by: Can Guo Signed-off-by: Can Guo Signed-off-by: Asutosh Das --- drivers/ufs/core/ufshcd.c | 32 ++++++++++++++++++++++++++++++++ include/ufs/ufs.h | 4 ++++ include/ufs/ufshcd.h | 4 ++++ include/ufs/ufshci.h | 7 +++++++ 4 files changed, 47 insertions(+) diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index f4f8ded..4b9ae83 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -88,6 +88,7 @@ /* Polling time to wait for fDeviceInit */ #define FDEVICEINIT_COMPL_TIMEOUT 1500 /* millisecs */ +#define EXT_IID_CAP_SHIFT 10 #define ufshcd_toggle_vreg(_dev, _vreg, _on) \ ({ \ int _ret; \ @@ -2239,6 +2240,10 @@ static inline int ufshcd_hba_capabilities(struct ufs_hba *hba) if (err) dev_err(hba->dev, "crypto setup failed\n"); + hba->mcq_capabilities = ufshcd_readl(hba, REG_MCQCAP); + hba->ext_iid_sup = (hba->mcq_capabilities & MASK_EXT_IID_SUPPORT) >> + EXT_IID_CAP_SHIFT; + return err; } @@ -7664,6 +7669,30 @@ static void ufshcd_temp_notif_probe(struct ufs_hba *hba, const u8 *desc_buf) } } +static void ufshcd_ext_iid_probe(struct ufs_hba *hba, u8 *desc_buf) +{ + struct ufs_dev_info *dev_info = &hba->dev_info; + u32 ext_ufs_feature; + u32 ext_iid_en = 0; + int err; + + if (dev_info->wspecversion < 0x400) + goto out; + + ext_ufs_feature = get_unaligned_be32(desc_buf + DEVICE_DESC_PARAM_EXT_UFS_FEATURE_SUP); + + if (!(ext_ufs_feature & UFS_DEV_EXT_IID_SUP)) + goto out; + + err = ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_READ_ATTR, + QUERY_ATTR_IDN_EXT_IID_EN, 0, 0, &ext_iid_en); + if (err) + dev_err(hba->dev, "failed reading bEXTIIDEn. err = %d\n", err); + +out: + dev_info->b_ext_iid_en = !!ext_iid_en; +} + void ufshcd_fixup_dev_quirks(struct ufs_hba *hba, const struct ufs_dev_quirk *fixups) { @@ -7762,6 +7791,9 @@ static int ufs_get_device_desc(struct ufs_hba *hba) ufshcd_temp_notif_probe(hba, desc_buf); + if (hba->ext_iid_sup) + ufshcd_ext_iid_probe(hba, desc_buf); + /* * ufshcd_read_string_desc returns size of the string * reset the error value diff --git a/include/ufs/ufs.h b/include/ufs/ufs.h index 1bba3fe..ba2a1d8 100644 --- a/include/ufs/ufs.h +++ b/include/ufs/ufs.h @@ -165,6 +165,7 @@ enum attr_idn { QUERY_ATTR_IDN_AVAIL_WB_BUFF_SIZE = 0x1D, QUERY_ATTR_IDN_WB_BUFF_LIFE_TIME_EST = 0x1E, QUERY_ATTR_IDN_CURR_WB_BUFF_SIZE = 0x1F, + QUERY_ATTR_IDN_EXT_IID_EN = 0x2A, }; /* Descriptor idn for Query requests */ @@ -352,6 +353,7 @@ enum { UFS_DEV_EXT_TEMP_NOTIF = BIT(6), UFS_DEV_HPB_SUPPORT = BIT(7), UFS_DEV_WRITE_BOOSTER_SUP = BIT(8), + UFS_DEV_EXT_IID_SUP = BIT(16), }; #define UFS_DEV_HPB_SUPPORT_VERSION 0x310 @@ -601,6 +603,8 @@ struct ufs_dev_info { bool b_rpm_dev_flush_capable; u8 b_presrv_uspc_en; + /* UFS EXT_IID Enable */ + bool b_ext_iid_en; }; /* diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h index 7fe1a92..da1eb8a 100644 --- a/include/ufs/ufshcd.h +++ b/include/ufs/ufshcd.h @@ -737,6 +737,7 @@ struct ufs_hba_monitor { * @outstanding_lock: Protects @outstanding_reqs. * @outstanding_reqs: Bits representing outstanding transfer requests * @capabilities: UFS Controller Capabilities + * @mcq_capabilities: UFS Multi Command Queue capabilities * @nutrs: Transfer Request Queue depth supported by controller * @nutmrs: Task Management Queue depth supported by controller * @reserved_slot: Used to submit device commands. Protected by @dev_cmd.lock. @@ -818,6 +819,7 @@ struct ufs_hba_monitor { * device * @complete_put: whether or not to call ufshcd_rpm_put() from inside * ufshcd_resume_complete() + * @ext_iid_sup: is EXT_IID is supported by UFSHC */ struct ufs_hba { void __iomem *mmio_base; @@ -859,6 +861,7 @@ struct ufs_hba { u32 capabilities; int nutrs; + u32 mcq_capabilities; int nutmrs; u32 reserved_slot; u32 ufs_version; @@ -965,6 +968,7 @@ struct ufs_hba { #endif u32 luns_avail; bool complete_put; + bool ext_iid_sup; }; /* Returns true if clocks can be gated. Otherwise false */ diff --git a/include/ufs/ufshci.h b/include/ufs/ufshci.h index f81aa95..ef5c3a8 100644 --- a/include/ufs/ufshci.h +++ b/include/ufs/ufshci.h @@ -22,6 +22,7 @@ enum { /* UFSHCI Registers */ enum { REG_CONTROLLER_CAPABILITIES = 0x00, + REG_MCQCAP = 0x04, REG_UFS_VERSION = 0x08, REG_CONTROLLER_DEV_ID = 0x10, REG_CONTROLLER_PROD_ID = 0x14, @@ -68,6 +69,12 @@ enum { MASK_OUT_OF_ORDER_DATA_DELIVERY_SUPPORT = 0x02000000, MASK_UIC_DME_TEST_MODE_SUPPORT = 0x04000000, MASK_CRYPTO_SUPPORT = 0x10000000, + MASK_MCQ_SUPPORT = 0x40000000, +}; + +/* MCQ capability mask */ +enum { + MASK_EXT_IID_SUPPORT = 0x00000400, }; #define UFS_MASK(mask, offset) ((mask) << (offset)) -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel