From patchwork Wed Feb 29 06:41:50 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Santosh Yaraganavi X-Patchwork-Id: 6993 Return-Path: X-Original-To: patchwork@peony.canonical.com Delivered-To: patchwork@peony.canonical.com Received: from fiordland.canonical.com (fiordland.canonical.com [91.189.94.145]) by peony.canonical.com (Postfix) with ESMTP id D111123EB0 for ; Wed, 29 Feb 2012 06:44:13 +0000 (UTC) Received: from mail-iy0-f180.google.com (mail-iy0-f180.google.com [209.85.210.180]) by fiordland.canonical.com (Postfix) with ESMTP id 65C70A180D5 for ; Wed, 29 Feb 2012 06:44:13 +0000 (UTC) Received: by mail-iy0-f180.google.com with SMTP id e36so2747544iag.11 for ; Tue, 28 Feb 2012 22:44:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:x-forwarded-to:x-forwarded-for:delivered-to :received-spf:received-spf:dkim-signature:from:to:cc:subject:date :message-id:x-mailer:in-reply-to:references; bh=WH2E4xSECGEmsgE91zsQIOISM4vNIGep3wgwlJQCGRo=; b=MrLNuqlln79uAwe8/fGgrbd+DwHtYGrv5Ad/5Xho3gpehhhPzUQFUqdn/zkJzxMOVg QH479xTGz0FYieFUrZi0atFbDEXTJNP7foTW9olBPJWU6mlSpcmByCNmtWe69nK6gVzy a1TIqM/2gCT7QqH2kFr5KhUsmr1ntu7blpt0c= MIME-Version: 1.0 Received: by 10.43.52.74 with SMTP id vl10mr15648458icb.55.1330497853144; Tue, 28 Feb 2012 22:44:13 -0800 (PST) X-Forwarded-To: linaro-patchwork@canonical.com X-Forwarded-For: patch@linaro.org linaro-patchwork@canonical.com Delivered-To: patches@linaro.org Received: by 10.231.11.10 with SMTP id r10csp25887ibr; Tue, 28 Feb 2012 22:44:12 -0800 (PST) Received: by 10.68.74.138 with SMTP id t10mr2075487pbv.126.1330497851325; Tue, 28 Feb 2012 22:44:11 -0800 (PST) Received: from mail-pz0-f44.google.com (mail-pz0-f44.google.com [209.85.210.44]) by mx.google.com with ESMTPS id t9si25032117pbi.43.2012.02.28.22.44.08 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 28 Feb 2012 22:44:11 -0800 (PST) Received-SPF: pass (google.com: domain of santoshsy@gmail.com designates 209.85.210.44 as permitted sender) client-ip=209.85.210.44; Authentication-Results: mx.google.com; spf=pass (google.com: domain of santoshsy@gmail.com designates 209.85.210.44 as permitted sender) smtp.mail=santoshsy@gmail.com; dkim=pass header.i=@gmail.com Received: by mail-pz0-f44.google.com with SMTP id l33so4432658dak.17 for ; Tue, 28 Feb 2012 22:44:08 -0800 (PST) Received-SPF: pass (google.com: domain of santoshsy@gmail.com designates 10.68.220.197 as permitted sender) client-ip=10.68.220.197; Received: from mr.google.com ([10.68.220.197]) by 10.68.220.197 with SMTP id py5mr1303132pbc.93.1330497848596 (num_hops = 1); Tue, 28 Feb 2012 22:44:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; bh=WH2E4xSECGEmsgE91zsQIOISM4vNIGep3wgwlJQCGRo=; b=gfRUCMcGe/8GaoEmmDrg1tN4CBcn4Q/0CiNoLvjA2pWPxNEdeABXrxmYxQryVVwH7o PNCg+F9P6aYfe2R27YDg2zlPKhcbfl++GJD0WBk9NtFrPX35QlhxA8PclFbKf2BGZQd8 GyIt2vNT2PDRRHMx+OOYTV3qUbj8Vzui/v7gg= Received: by 10.68.220.197 with SMTP id py5mr1083715pbc.93.1330497848417; Tue, 28 Feb 2012 22:44:08 -0800 (PST) Received: from girishks ([115.113.119.130]) by mx.google.com with ESMTPS id 3sm17830262pbx.66.2012.02.28.22.43.57 (version=SSLv3 cipher=OTHER); Tue, 28 Feb 2012 22:44:07 -0800 (PST) From: Santosh Y To: James.Bottomley@hansenpartnership.com Cc: linux-scsi@vger.kernel.org, patches@linaro.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, arnd.bergmann@linaro.org, saugata.das@linaro.org, dsaxena@linaro.org, stephen.doel@linaro.org, venkat@linaro.org, ilho215.lee@samsung.com, nala.la@samsung.com, girish.shivananjappa@linaro.org, vishak.g@samsung.com, k.rajesh@samsung.com, yejin.moon@samsung.com, sreekumar.c@samsung.com, vinholikatti@gmail.com, linkinjeon@gmail.com, michaelc@cs.wisc.edu, Santosh Yaraganavi Subject: [PATCH v3 1/5] [SCSI] ufshcd: UFS Host controller driver Date: Wed, 29 Feb 2012 12:11:50 +0530 Message-Id: <1330497714-26504-2-git-send-email-santoshsy@gmail.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1330497714-26504-1-git-send-email-santoshsy@gmail.com> References: <1330497714-26504-1-git-send-email-santoshsy@gmail.com> X-Gm-Message-State: ALoCoQmVVIE4tpLN4kEkc+d2kfN5edeJi9xVlVL/gSBBv52n23v8MMadBxZQkgnV21jix4nI3dEL From: Santosh Yaraganavi This patch adds support for Universal Flash Storage(UFS) host controllers. The UFS host controller driver includes host controller initialization method. The Initialization process involves following steps: - Initiate UFS Host Controller initialization process by writing to Host controller enable register - Configure UFS Host controller registers with host memory space datastructure offsets. - Unipro link startup procedure - Check for connected device - Configure UFS host controller to process requests - Enable required interrupts - Configure interrupt aggregation Signed-off-by: Santosh Yaraganavi Signed-off-by: Vinayak Holikatti Reviewed-by: Arnd Bergmann Reviewed-by: Vishak G Reviewed-by: Girish K S Reviewed-by: Namjae Jeon --- v2 -> v3: - use shost_priv() instead of accessing hostdata directly. v1 -> v2: - ufshcd_memory_alloc(): remove explicit memory alignment. - Re-use ufshcd_free_hba_memory() in ufshcd_memory_alloc - ufshcd_make_hba_operational(): Remove -EINVAL and use -ENXIO, -EIO - Remove NULL macro definition. - Remove macros BYTES_TO_DWORDS and UFSHCD_MMIO_BASE. - ufshcd_controller_enable(): send controller to reset state only if the controller is active. - ufshcd_intr(): Use spin_lock() instead of spin_lock_irqsave(). - ufshcd_suspend/ufshcd_resume: add TODO comments. - ufshcd_set_dma_mask(): Change DMA mask setting to 64/32 based on controller capability. - Change conditional statement to match kernel coding style, Ex: if (constant == variable) to if (variable == constant) if (NULL != pointer) to if (pointer) drivers/scsi/Kconfig | 1 + drivers/scsi/Makefile | 1 + drivers/scsi/ufs/Kconfig | 49 ++ drivers/scsi/ufs/Makefile | 2 + drivers/scsi/ufs/ufs.h | 207 +++++++++ drivers/scsi/ufs/ufshcd.c | 1091 +++++++++++++++++++++++++++++++++++++++++++++ drivers/scsi/ufs/ufshci.h | 376 ++++++++++++++++ 7 files changed, 1727 insertions(+), 0 deletions(-) create mode 100644 drivers/scsi/ufs/Kconfig create mode 100644 drivers/scsi/ufs/Makefile create mode 100644 drivers/scsi/ufs/ufs.h create mode 100644 drivers/scsi/ufs/ufshcd.c create mode 100644 drivers/scsi/ufs/ufshci.h diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig index 16570aa..477a91a 100644 --- a/drivers/scsi/Kconfig +++ b/drivers/scsi/Kconfig @@ -619,6 +619,7 @@ config SCSI_ARCMSR source "drivers/scsi/megaraid/Kconfig.megaraid" source "drivers/scsi/mpt2sas/Kconfig" +source "drivers/scsi/ufs/Kconfig" config SCSI_HPTIOP tristate "HighPoint RocketRAID 3xxx/4xxx Controller support" diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile index 2b88749..c832974 100644 --- a/drivers/scsi/Makefile +++ b/drivers/scsi/Makefile @@ -108,6 +108,7 @@ obj-$(CONFIG_MEGARAID_LEGACY) += megaraid.o obj-$(CONFIG_MEGARAID_NEWGEN) += megaraid/ obj-$(CONFIG_MEGARAID_SAS) += megaraid/ obj-$(CONFIG_SCSI_MPT2SAS) += mpt2sas/ +obj-$(CONFIG_SCSI_UFSHCD) += ufs/ obj-$(CONFIG_SCSI_ACARD) += atp870u.o obj-$(CONFIG_SCSI_SUNESP) += esp_scsi.o sun_esp.o obj-$(CONFIG_SCSI_GDTH) += gdth.o diff --git a/drivers/scsi/ufs/Kconfig b/drivers/scsi/ufs/Kconfig new file mode 100644 index 0000000..8f27f9d --- /dev/null +++ b/drivers/scsi/ufs/Kconfig @@ -0,0 +1,49 @@ +# +# Kernel configuration file for the UFS Host Controller +# +# This code is based on drivers/scsi/ufs/Kconfig +# Copyright (C) 2011 Samsung Samsung India Software Operations +# +# Santosh Yaraganavi +# Vinayak Holikatti + +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License +# as published by the Free Software Foundation; either version 2 +# of the License, or (at your option) any later version. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. + +# NO WARRANTY +# THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR +# CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT +# LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT, +# MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is +# solely responsible for determining the appropriateness of using and +# distributing the Program and assumes all risks associated with its +# exercise of rights under this Agreement, including but not limited to +# the risks and costs of program errors, damage to or loss of data, +# programs or equipment, and unavailability or interruption of operations. + +# DISCLAIMER OF LIABILITY +# NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY +# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +# DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND +# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR +# TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE +# USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED +# HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES + +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, +# USA. + +config SCSI_UFSHCD + tristate "Universal Flash Storage host controller driver" + depends on PCI && SCSI + ---help--- + This is a generic driver which supports PCIe UFS Host controllers. diff --git a/drivers/scsi/ufs/Makefile b/drivers/scsi/ufs/Makefile new file mode 100644 index 0000000..adf7895 --- /dev/null +++ b/drivers/scsi/ufs/Makefile @@ -0,0 +1,2 @@ +# UFSHCD makefile +obj-$(CONFIG_SCSI_UFSHCD) += ufshcd.o diff --git a/drivers/scsi/ufs/ufs.h b/drivers/scsi/ufs/ufs.h new file mode 100644 index 0000000..b207529 --- /dev/null +++ b/drivers/scsi/ufs/ufs.h @@ -0,0 +1,207 @@ +/* + * Universal Flash Storage Host controller driver + * + * This code is based on drivers/scsi/ufs/ufs.h + * Copyright (C) 2011-2012 Samsung India Software Operations + * + * Santosh Yaraganavi + * Vinayak Holikatti + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * NO WARRANTY + * THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR + * CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT + * LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT, + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is + * solely responsible for determining the appropriateness of using and + * distributing the Program and assumes all risks associated with its + * exercise of rights under this Agreement, including but not limited to + * the risks and costs of program errors, damage to or loss of data, + * programs or equipment, and unavailability or interruption of operations. + + * DISCLAIMER OF LIABILITY + * NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR + * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE + * USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED + * HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES + + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, + * USA. + */ + +#ifndef _UFS_H +#define _UFS_H + +#define MAX_CDB_SIZE 16 + +#define UPIU_HEADER_DWORD(byte3, byte2, byte1, byte0)\ + ((byte3 << 24) | (byte2 << 16) |\ + (byte1 << 8) | (byte0)) + +/* + * UFS Protocol Information Unit related definitions + */ + +/* Task management functions */ +enum { + UFS_ABORT_TASK = 0x01, + UFS_ABORT_TASK_SET = 0x02, + UFS_CLEAR_TASK_SET = 0x04, + UFS_LOGICAL_RESET = 0x08, + UFS_QUERY_TASK = 0x80, + UFS_QUERY_TASK_SET = 0x81, +}; + +/* UTP UPIU Transaction Codes Initiator to Target */ +enum { + UPIU_TRANSACTION_NOP_OUT = 0x00, + UPIU_TRANSACTION_COMMAND = 0x01, + UPIU_TRANSACTION_DATA_OUT = 0x02, + UPIU_TRANSACTION_TASK_REQ = 0x04, + UPIU_TRANSACTION_QUERY_REQ = 0x26, +}; + +/* UTP UPIU Transaction Codes Target to Initiator */ +enum { + UPIU_TRANSACTION_NOP_IN = 0x20, + UPIU_TRANSACTION_RESPONSE = 0x21, + UPIU_TRANSACTION_DATA_IN = 0x22, + UPIU_TRANSACTION_TASK_RSP = 0x24, + UPIU_TRANSACTION_READY_XFER = 0x31, + UPIU_TRANSACTION_QUERY_RSP = 0x36, +}; + +/* UPIU Read/Write flags */ +enum { + UPIU_CMD_FLAGS_NONE = 0x00, + UPIU_CMD_FLAGS_WRITE = 0x20, + UPIU_CMD_FLAGS_READ = 0x40, +}; + +/* UPIU Task Attributes */ +enum { + UPIU_TASK_ATTR_SIMPLE = 0x00, + UPIU_TASK_ATTR_ORDERED = 0x01, + UPIU_TASK_ATTR_HEADQ = 0x02, + UPIU_TASK_ATTR_ACA = 0x03, +}; + +/* UTP QUERY Transaction Specific Fields OpCode */ +enum { + UPIU_QUERY_OPCODE_NOP = 0x0, + UPIU_QUERY_OPCODE_READ_DESC = 0x1, + UPIU_QUERY_OPCODE_WRITE_DESC = 0x2, + UPIU_QUERY_OPCODE_READ_ATTR = 0x3, + UPIU_QUERY_OPCODE_WRITE_ATTR = 0x4, + UPIU_QUERY_OPCODE_READ_FLAG = 0x5, + UPIU_QUERY_OPCODE_SET_FLAG = 0x6, + UPIU_QUERY_OPCODE_CLEAR_FLAG = 0x7, + UPIU_QUERY_OPCODE_TOGGLE_FLAG = 0x8, +}; + +/* UTP Transfer Request Command Type (CT) */ +enum { + UPIU_COMMAND_SET_TYPE_SCSI = 0x0, + UPIU_COMMAND_SET_TYPE_UFS = 0x1, + UPIU_COMMAND_SET_TYPE_QUERY = 0x2, +}; + +enum { + MASK_SCSI_STATUS = 0xFF, + MASK_TASK_RESPONSE = 0xFF00, + MASK_RSP_UPIU_RESULT = 0xFFFF, +}; + +/* Task management service response */ +enum { + UPIU_TASK_MANAGEMENT_FUNC_COMPL = 0x00, + UPIU_TASK_MANAGEMENT_FUNC_NOT_SUPPORTED = 0x04, + UPIU_TASK_MANAGEMENT_FUNC_SUCCEEDED = 0x08, + UPIU_TASK_MANAGEMENT_FUNC_FAILED = 0x05, + UPIU_INCORRECT_LOGICAL_UNIT_NO = 0x09, +}; +/** + * struct utp_upiu_header - UPIU header structure + * @dword_0: UPIU header DW-0 + * @dword_1: UPIU header DW-1 + * @dword_2: UPIU header DW-2 + */ +struct utp_upiu_header { + u32 dword_0; + u32 dword_1; + u32 dword_2; +}; + +/** + * struct utp_upiu_cmd - Command UPIU structure + * @header: UPIU header structure DW-0 to DW-2 + * @data_transfer_len: Data Transfer Length DW-3 + * @cdb: Command Descriptor Block CDB DW-4 to DW-7 + */ +struct utp_upiu_cmd { + struct utp_upiu_header header; + u32 exp_data_transfer_len; + u8 cdb[MAX_CDB_SIZE]; +}; + +/** + * struct utp_upiu_rsp - Response UPIU structure + * @header: UPIU header DW-0 to DW-2 + * @residual_transfer_count: Residual transfer count DW-3 + * @reserved: Reserved double words DW-4 to DW-7 + * @sense_data_len: Sense data length DW-8 U16 + * @sense_data: Sense data field DW-8 to DW-12 + */ +struct utp_upiu_rsp { + struct utp_upiu_header header; + u32 residual_transfer_count; + u32 reserved[4]; + u16 sense_data_len; + u8 sense_data[18]; +}; + +/** + * struct utp_upiu_task_req - Task request UPIU structure + * @header - UPIU header structure DW0 to DW-2 + * @input_param1: Input parameter 1 DW-3 + * @input_param2: Input parameter 2 DW-4 + * @input_param3: Input parameter 3 DW-5 + * @reserved: Reserved double words DW-6 to DW-7 + */ +struct utp_upiu_task_req { + struct utp_upiu_header header; + u32 input_param1; + u32 input_param2; + u32 input_param3; + u32 reserved[2]; +}; + +/** + * struct utp_upiu_task_rsp - Task Management Response UPIU structure + * @header: UPIU header structure DW0-DW-2 + * @output_param1: Ouput parameter 1 DW3 + * @output_param2: Output parameter 2 DW4 + * @reserved: Reserved double words DW-5 to DW-7 + */ +struct utp_upiu_task_rsp { + struct utp_upiu_header header; + u32 output_param1; + u32 output_param2; + u32 reserved[3]; +}; + +#endif /* End of Header */ diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c new file mode 100644 index 0000000..26b16c1 --- /dev/null +++ b/drivers/scsi/ufs/ufshcd.c @@ -0,0 +1,1091 @@ +/* + * Universal Flash Storage Host controller driver + * + * This code is based on drivers/scsi/ufs/ufshcd.c + * Copyright (C) 2011-2012 Samsung India Software Operations + * + * Santosh Yaraganavi + * Vinayak Holikatti + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * NO WARRANTY + * THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR + * CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT + * LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT, + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is + * solely responsible for determining the appropriateness of using and + * distributing the Program and assumes all risks associated with its + * exercise of rights under this Agreement, including but not limited to + * the risks and costs of program errors, damage to or loss of data, + * programs or equipment, and unavailability or interruption of operations. + + * DISCLAIMER OF LIABILITY + * NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR + * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE + * USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED + * HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES + + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, + * USA. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include + +#include "ufs.h" +#include "ufshci.h" + +#define UFSHCD "ufshcd" +#define UFSHCD_DRIVER_VERSION "0.1" + +enum { + UFSHCD_MAX_CHANNEL = 0, + UFSHCD_MAX_ID = 1, + UFSHCD_MAX_LUNS = 8, +}; + +/* UFSHCD states */ +enum { + UFSHCD_STATE_OPERATIONAL, + UFSHCD_STATE_RESET, + UFSHCD_STATE_ERROR, +}; + +/* Interrupt configuration options */ +enum { + UFSHCD_INT_DISABLE, + UFSHCD_INT_ENABLE, + UFSHCD_INT_CLEAR, +}; + +/* Interrupt aggregation options */ +enum { + INT_AGGR_RESET, + INT_AGGR_CONFIG, +}; + +/** + * struct uic_command - UIC command structure + * @command: UIC command + * @argument1: UIC command argument 1 + * @argument2: UIC command argument 2 + * @argument3: UIC command argument 3 + * @cmd_active: Indicate if UIC command is outstanding + * @result: UIC command result + */ +struct uic_command { + u32 command; + u32 argument1; + u32 argument2; + u32 argument3; + int cmd_active; + int result; +}; + +/** + * struct ufs_hba - per adapter private structure + * @mmio_base: UFSHCI base register address + * @ucdl_base_addr: UFS Command Descriptor base address + * @utrdl_base_addr: UTP Transfer Request Descriptor base address + * @utmrdl_base_addr: UTP Task Management Descriptor base address + * @ucdl_dma_addr: UFS Command Descriptor DMA address + * @utrdl_dma_addr: UTRDL DMA address + * @utmrdl_dma_addr: UTMRDL DMA address + * @host: Scsi_Host instance of the driver + * @pdev: PCI device handle + * @lrb: local reference block + * @capabilities: UFS Controller Capabilities + * @nutrs: Transfer Request Queue depth supported by controller + * @nutmrs: Task Management Queue depth supported by controller + * @active_uic_cmd: handle of active UIC command + * @ufshcd_state: UFSHCD states + * @int_enable_mask: Interrupt Mask Bits + * @uic_workq: Work queue for UIC completion handling + */ +struct ufs_hba { + void __iomem *mmio_base; + + /* Virtual memory reference */ + struct utp_transfer_cmd_desc *ucdl_base_addr; + struct utp_transfer_req_desc *utrdl_base_addr; + struct utp_task_req_desc *utmrdl_base_addr; + + /* DMA memory reference */ + dma_addr_t ucdl_dma_addr; + dma_addr_t utrdl_dma_addr; + dma_addr_t utmrdl_dma_addr; + + struct Scsi_Host *host; + struct pci_dev *pdev; + + struct ufshcd_lrb *lrb; + + u32 capabilities; + int nutrs; + int nutmrs; + u32 ufs_version; + + struct uic_command active_uic_cmd; + + u32 ufshcd_state; + u32 int_enable_mask; + + /* Work Queues */ + struct work_struct uic_workq; +}; + +/** + * struct ufshcd_lrb - local reference block + * @utr_descriptor_ptr: UTRD address of the command + * @ucd_cmd_ptr: UCD address of the command + * @ucd_rsp_ptr: Response UPIU address for this command + * @ucd_prdt_ptr: PRDT address of the command + */ +struct ufshcd_lrb { + struct utp_transfer_req_desc *utr_descriptor_ptr; + struct utp_upiu_cmd *ucd_cmd_ptr; + struct utp_upiu_rsp *ucd_rsp_ptr; + struct ufshcd_sg_entry *ucd_prdt_ptr; +}; + +/** + * ufshcd_get_ufs_version - Get the UFS version supported by the HBA + * @hba - Pointer to adapter instance + * + * Returns UFSHCI version supported by the controller + */ +static inline u32 ufshcd_get_ufs_version(struct ufs_hba *hba) +{ + return readl(hba->mmio_base + REG_UFS_VERSION); +} + +/** + * ufshcd_is_device_present - Check if any device connected to + * the host controller + * @reg_hcs - host controller status register value + * + * Returns 0 if device present, non-zero if no device detected + */ +static inline int ufshcd_is_device_present(u32 reg_hcs) +{ + return (DEVICE_PRESENT & reg_hcs) ? 0 : -1; +} + +/** + * ufshcd_get_lists_status - Check UCRDY, UTRLRDY and UTMRLRDY + * @reg: Register value of host controller status + * + * Returns integer, 0 on Success and positive value if failed + */ +static inline int ufshcd_get_lists_status(u32 reg) +{ + /* + * The mask 0xFF is for the following HCS register bits + * Bit Description + * 0 Device Present + * 1 UTRLRDY + * 2 UTMRLRDY + * 3 UCRDY + * 4 HEI + * 5 DEI + * 6-7 reserved + */ + return (((reg) & (0xFF)) >> 1) ^ (0x07); +} + +/** + * ufshcd_get_uic_cmd_result - Get the UIC command result + * @hba: Pointer to adapter instance + * + * This function gets the result of UIC command completion + * Returns 0 on success, non zero value on error + */ +static inline int ufshcd_get_uic_cmd_result(struct ufs_hba *hba) +{ + return readl(hba->mmio_base + REG_UIC_COMMAND_ARG_2) & + MASK_UIC_COMMAND_RESULT; +} + +/** + * ufshcd_free_hba_memory - Free allocated memory for LRB, request + * and task lists + * @hba: Pointer to adapter instance + */ +static inline void ufshcd_free_hba_memory(struct ufs_hba *hba) +{ + size_t utmrdl_size, utrdl_size, ucdl_size; + + kfree(hba->lrb); + + if (hba->utmrdl_base_addr) { + utmrdl_size = sizeof(struct utp_task_req_desc) * hba->nutmrs; + dma_free_coherent(&hba->pdev->dev, utmrdl_size, + hba->utmrdl_base_addr, hba->utmrdl_dma_addr); + } + + if (hba->utrdl_base_addr) { + utrdl_size = + (sizeof(struct utp_transfer_req_desc) * hba->nutrs); + dma_free_coherent(&hba->pdev->dev, utrdl_size, + hba->utrdl_base_addr, hba->utrdl_dma_addr); + } + + if (hba->ucdl_base_addr) { + ucdl_size = + (sizeof(struct utp_transfer_cmd_desc) * hba->nutrs); + dma_free_coherent(&hba->pdev->dev, ucdl_size, + hba->ucdl_base_addr, hba->ucdl_dma_addr); + } +} + +/** + * ufshcd_config_int_aggr - Configure interrupt aggregation values. + * Currently there is no use case where we want to configure + * interrupt aggregation dynamically. So to configure interrupt + * aggregation, #define INT_AGGR_COUNTER_THRESHOLD_VALUE and + * INT_AGGR_TIMEOUT_VALUE are used. + * @hba: per adapter instance + * @option: Interrupt aggregation option + */ +static inline void +ufshcd_config_int_aggr(struct ufs_hba *hba, int option) +{ + switch (option) { + case INT_AGGR_RESET: + writel((INT_AGGR_ENABLE | + INT_AGGR_COUNTER_AND_TIMER_RESET), + (hba->mmio_base + + REG_UTP_TRANSFER_REQ_INT_AGG_CONTROL)); + break; + case INT_AGGR_CONFIG: + writel((INT_AGGR_ENABLE | + INT_AGGR_PARAM_WRITE | + INT_AGGR_COUNTER_THRESHOLD_VALUE | + INT_AGGR_TIMEOUT_VALUE), + (hba->mmio_base + + REG_UTP_TRANSFER_REQ_INT_AGG_CONTROL)); + break; + } +} + +/** + * ufshcd_enable_run_stop_reg - Enable run-stop registers, + * When run-stop registers are set to 1, it indicates the + * host controller that it can process the requests + * @hba: per adapter instance + */ +static void ufshcd_enable_run_stop_reg(struct ufs_hba *hba) +{ + writel(UTP_TASK_REQ_LIST_RUN_STOP_BIT, + (hba->mmio_base + + REG_UTP_TASK_REQ_LIST_RUN_STOP)); + writel(UTP_TRANSFER_REQ_LIST_RUN_STOP_BIT, + (hba->mmio_base + + REG_UTP_TRANSFER_REQ_LIST_RUN_STOP)); +} + +/** + * ufshcd_hba_stop - Send controller to reset state + * @hba: per adapter instance + */ +static inline void ufshcd_hba_stop(struct ufs_hba *hba) +{ + writel(CONTROLLER_DISABLE, (hba->mmio_base + REG_CONTROLLER_ENABLE)); +} + +/** + * ufshcd_hba_start - Start controller initialization sequence + * @hba: per adapter instance + */ +static inline void ufshcd_hba_start(struct ufs_hba *hba) +{ + writel(CONTROLLER_ENABLE , (hba->mmio_base + REG_CONTROLLER_ENABLE)); +} + +/** + * ufshcd_is_hba_active - Get controller state + * @hba: per adapter instance + * + * Returns zero if controller is active, 1 otherwise + */ +static inline int ufshcd_is_hba_active(struct ufs_hba *hba) +{ + return (readl(hba->mmio_base + REG_CONTROLLER_ENABLE) & 0x1) ? 0 : 1; +} + +/** + * ufshcd_hba_capabilities - Read controller capabilities + * @hba: per adapter instance + */ +static inline void ufshcd_hba_capabilities(struct ufs_hba *hba) +{ + hba->capabilities = + readl(hba->mmio_base + REG_CONTROLLER_CAPABILITIES); + + /* nutrs and nutmrs are 0 based values */ + hba->nutrs = (hba->capabilities & MASK_TRANSFER_REQUESTS_SLOTS) + 1; + hba->nutmrs = + ((hba->capabilities & MASK_TASK_MANAGEMENT_REQUEST_SLOTS) >> 16) + 1; +} + +/** + * ufshcd_send_uic_command - Send UIC commands to unipro layers + * @hba: per adapter instance + * @uic_command: UIC command + */ +static inline void +ufshcd_send_uic_command(struct ufs_hba *hba, struct uic_command *uic_cmnd) +{ + /* Write Args */ + writel(uic_cmnd->argument1, + (hba->mmio_base + REG_UIC_COMMAND_ARG_1)); + writel(uic_cmnd->argument2, + (hba->mmio_base + REG_UIC_COMMAND_ARG_2)); + writel(uic_cmnd->argument3, + (hba->mmio_base + REG_UIC_COMMAND_ARG_3)); + + /* Write UIC Cmd */ + writel((uic_cmnd->command & COMMAND_OPCODE_MASK), + (hba->mmio_base + REG_UIC_COMMAND)); +} + +/** + * ufshcd_int_config - enable/disable interrupts + * @hba: per adapter instance + * @option: interrupt option + */ +static void ufshcd_int_config(struct ufs_hba *hba, u32 option) +{ + switch (option) { + case UFSHCD_INT_ENABLE: + writel(hba->int_enable_mask, + (hba->mmio_base + REG_INTERRUPT_ENABLE)); + break; + case UFSHCD_INT_DISABLE: + if (hba->ufs_version == UFSHCI_VERSION_10) + writel(INTERRUPT_DISABLE_MASK_10, + (hba->mmio_base + REG_INTERRUPT_ENABLE)); + else + writel(INTERRUPT_DISABLE_MASK_11, + (hba->mmio_base + REG_INTERRUPT_ENABLE)); + break; + } +} + +/** + * ufshcd_memory_alloc - allocate memory for host memory space data structures + * @hba: per adapter instance + * + * 1. Allocate DMA memory for Command Descriptor array + * Each command descriptor consist of Command UPIU, Response UPIU and PRDT + * 2. Allocate DMA memory for UTP Transfer Request Descriptor List (UTRDL). + * 3. Allocate DMA memory for UTP Task Management Request Descriptor List + * (UTMRDL) + * 4. Allocate memory for local reference block(lrb). + * + * Returns 0 for success, non-zero in case of failure + */ +static int ufshcd_memory_alloc(struct ufs_hba *hba) +{ + size_t utmrdl_size, utrdl_size, ucdl_size; + + /* Allocate memory for UTP command descriptors */ + ucdl_size = (sizeof(struct utp_transfer_cmd_desc) * hba->nutrs); + hba->ucdl_base_addr = dma_alloc_coherent(&hba->pdev->dev, + ucdl_size, + &hba->ucdl_dma_addr, + GFP_KERNEL); + + /* + * UFSHCI requires UTP command descriptor to be 128 byte aligned. + * make sure hba->ucdl_dma_addr is aligned to PAGE_SIZE + * if hba->ucdl_dma_addr is aligned to PAGE_SIZE, then it will + * be aligned to 128 bytes as well + */ + if (!hba->ucdl_base_addr || + WARN_ON(hba->ucdl_dma_addr & (PAGE_SIZE - 1))) { + dev_err(&hba->pdev->dev, + "Command Descriptor Memory allocation failed\n"); + goto out; + } + + /* + * Allocate memory for UTP Transfer descriptors + * UFSHCI requires 1024 byte alignment of UTRD + */ + utrdl_size = (sizeof(struct utp_transfer_req_desc) * hba->nutrs); + hba->utrdl_base_addr = dma_alloc_coherent(&hba->pdev->dev, + utrdl_size, + &hba->utrdl_dma_addr, + GFP_KERNEL); + if (!hba->utrdl_base_addr || + WARN_ON(hba->utrdl_dma_addr & (PAGE_SIZE - 1))) { + dev_err(&hba->pdev->dev, + "Transfer Descriptor Memory allocation failed\n"); + goto out; + } + + /* + * Allocate memory for UTP Task Management descriptors + * UFSHCI requires 1024 byte alignment of UTMRD + */ + utmrdl_size = sizeof(struct utp_task_req_desc) * hba->nutmrs; + hba->utmrdl_base_addr = dma_alloc_coherent(&hba->pdev->dev, + utmrdl_size, + &hba->utmrdl_dma_addr, + GFP_KERNEL); + if (!hba->utmrdl_base_addr || + WARN_ON(hba->utmrdl_dma_addr & (PAGE_SIZE - 1))) { + dev_err(&hba->pdev->dev, + "Task Management Descriptor Memory allocation failed\n"); + goto out; + } + + /* Allocate memory for local reference block */ + hba->lrb = kcalloc(hba->nutrs, sizeof(struct ufshcd_lrb), GFP_KERNEL); + if (!hba->lrb) { + dev_err(&hba->pdev->dev, "LRB Memory allocation failed\n"); + goto out; + } + return 0; +out: + ufshcd_free_hba_memory(hba); + return -ENOMEM; +} + +/** + * ufshcd_host_memory_configure - configure local reference block with + * memory offsets + * @hba: per adapter instance + * + * Configure Host memory space + * 1. Update Corresponding UTRD.UCDBA and UTRD.UCDBAU with UCD DMA + * address. + * 2. Update each UTRD with Response UPIU offset, Response UPIU length + * and PRDT offset. + * 3. Save the corresponding addresses of UTRD, UCD.CMD, UCD.RSP and UCD.PRDT + * into local reference block. + */ +static void ufshcd_host_memory_configure(struct ufs_hba *hba) +{ + struct utp_transfer_cmd_desc *cmd_descp; + struct utp_transfer_req_desc *utrdlp; + dma_addr_t cmd_desc_dma_addr; + dma_addr_t cmd_desc_element_addr; + u16 response_offset; + u16 prdt_offset; + int cmd_desc_size; + int i; + + utrdlp = hba->utrdl_base_addr; + cmd_descp = hba->ucdl_base_addr; + + response_offset = + offsetof(struct utp_transfer_cmd_desc, response_upiu); + prdt_offset = + offsetof(struct utp_transfer_cmd_desc, prd_table); + + cmd_desc_size = sizeof(struct utp_transfer_cmd_desc); + cmd_desc_dma_addr = hba->ucdl_dma_addr; + + for (i = 0; i < hba->nutrs; i++) { + /* Configure UTRD with command descriptor base address */ + cmd_desc_element_addr = + (cmd_desc_dma_addr + (cmd_desc_size * i)); + utrdlp[i].command_desc_base_addr_lo = + cpu_to_le32(cmd_desc_element_addr); + utrdlp[i].command_desc_base_addr_hi = + cpu_to_le32(cmd_desc_element_addr >> 32); + + /* 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); + + hba->lrb[i].utr_descriptor_ptr = (utrdlp + i); + hba->lrb[i].ucd_cmd_ptr = + (struct utp_upiu_cmd *)(cmd_descp + i); + hba->lrb[i].ucd_rsp_ptr = + (struct utp_upiu_rsp *)cmd_descp[i].response_upiu; + hba->lrb[i].ucd_prdt_ptr = + (struct ufshcd_sg_entry *)cmd_descp[i].prd_table; + } +} + +/** + * ufshcd_dme_link_startup - Notify Unipro to perform link startup + * @hba: per adapter instance + * + * UIC_CMD_DME_LINK_STARTUP command must be issued to Unipro layer, + * in order to initialize the Unipro link startup procedure. + * Once the Unipro links are up, the device connected to the controller + * is detected. + * + * Returns 0 on success, non-zero value on failure + */ +static int ufshcd_dme_link_startup(struct ufs_hba *hba) +{ + struct uic_command *uic_cmd; + unsigned long flags; + + /* check if controller is ready to accept UIC commands */ + if (((readl(hba->mmio_base + REG_CONTROLLER_STATUS)) & + UIC_COMMAND_READY) == 0x0) { + dev_err(&hba->pdev->dev, + "Controller not ready" + " to accept UIC commands\n"); + return -EIO; + } + + spin_lock_irqsave(hba->host->host_lock, flags); + + /* form UIC command */ + uic_cmd = &hba->active_uic_cmd; + uic_cmd->command = UIC_CMD_DME_LINK_STARTUP; + uic_cmd->argument1 = 0; + uic_cmd->argument2 = 0; + uic_cmd->argument3 = 0; + + /* enable UIC related interrupts */ + hba->int_enable_mask |= UIC_COMMAND_COMPL; + ufshcd_int_config(hba, UFSHCD_INT_ENABLE); + + /* sending UIC commands to controller */ + ufshcd_send_uic_command(hba, uic_cmd); + spin_unlock_irqrestore(hba->host->host_lock, flags); + return 0; +} + +/** + * ufshcd_make_hba_operational - Make UFS controller operational + * @hba: per adapter instance + * + * To bring UFS host controller to operational state, + * 1. Check if device is present + * 2. Configure run-stop-registers + * 3. Enable required interrupts + * 4. Configure interrupt aggregation + * + * Returns 0 on success, non-zero value on failure + */ +static int ufshcd_make_hba_operational(struct ufs_hba *hba) +{ + int err = 0; + u32 reg; + + /* check if device present */ + reg = readl((hba->mmio_base + REG_CONTROLLER_STATUS)); + if (ufshcd_is_device_present(reg)) { + dev_err(&hba->pdev->dev, "cc: Device not present\n"); + err = -ENXIO; + goto out; + } + + /* + * UCRDY, UTMRLDY and UTRLRDY bits must be 1 + * DEI, HEI bits must be 0 + */ + if (!(ufshcd_get_lists_status(reg))) { + ufshcd_enable_run_stop_reg(hba); + } else { + dev_err(&hba->pdev->dev, + "Host controller not ready to process requests"); + err = -EIO; + goto out; + } + + /* Enable required interrupts */ + hba->int_enable_mask |= (UTP_TRANSFER_REQ_COMPL | + UIC_ERROR | + UTP_TASK_REQ_COMPL | + DEVICE_FATAL_ERROR | + CONTROLLER_FATAL_ERROR | + SYSTEM_BUS_FATAL_ERROR); + ufshcd_int_config(hba, UFSHCD_INT_ENABLE); + + /* Configure interrupt aggregation */ + ufshcd_config_int_aggr(hba, INT_AGGR_CONFIG); + + hba->ufshcd_state = UFSHCD_STATE_OPERATIONAL; +out: + return err; +} + +/** + * ufshcd_hba_enable - initialize the controller + * @hba: per adapter instance + * + * The controller resets itself and controller firmware initialization + * sequence kicks off. When controller is ready it will set + * the Host Controller Enable bit to 1. + * + * Returns 0 on success, non-zero value on failure + */ +static int ufshcd_hba_enable(struct ufs_hba *hba) +{ + int retry; + + /* + * msleep of 1 and 5 used in this function might result in msleep(20), + * but it was necessary to send the UFS FPGA to reset mode during + * development and testing of this driver. msleep can be changed to + * mdelay and retry count can be reduced based on the controller. + */ + if (!ufshcd_is_hba_active(hba)) { + + /* change controller state to "reset state" */ + ufshcd_hba_stop(hba); + + /* + * This delay is based on the testing done with UFS host + * controller FPGA. The delay can be changed based on the + * host controller used. + */ + msleep(5); + } + + /* start controller initialization sequence */ + ufshcd_hba_start(hba); + + /* + * To initialize a UFS host controller HCE bit must be set to 1. + * During initialization the HCE bit value changes from 1->0->1. + * When the host controller completes initialization sequence + * it sets the value of HCE bit to 1. The same HCE bit is read back + * to check if the controller has completed initialization sequence. + * So without this delay the value HCE = 1, set in the previous + * instruction might be read back. + * This delay can be changed based on the controller. + */ + msleep(1); + + /* wait for the host controller to complete initialization */ + retry = 10; + while (ufshcd_is_hba_active(hba)) { + if (retry) { + retry--; + } else { + dev_err(&hba->pdev->dev, + "Controller enable failed\n"); + return -EIO; + } + msleep(5); + } + return 0; +} + +/** + * ufshcd_initialize_hba - start the initialization process + * @hba: per adapter instance + * + * 1. Enable the controller via ufshcd_hba_enable. + * 2. Program the Transfer Request List Address with the starting address of + * UTRDL. + * 3. Program the Task Management Request List Address with starting address + * of UTMRDL. + * + * Returns 0 on success, non-zero value on failure. + */ +static int ufshcd_initialize_hba(struct ufs_hba *hba) +{ + if (ufshcd_hba_enable(hba)) + return -EIO; + + /* Configure UTRL and UTMRL base address registers */ + writel(hba->utrdl_dma_addr, + (hba->mmio_base + REG_UTP_TRANSFER_REQ_LIST_BASE_L)); + writel((hba->utrdl_dma_addr >> 32), + (hba->mmio_base + REG_UTP_TRANSFER_REQ_LIST_BASE_H)); + writel(hba->utmrdl_dma_addr, + (hba->mmio_base + REG_UTP_TASK_REQ_LIST_BASE_L)); + writel((hba->utmrdl_dma_addr >> 32), + (hba->mmio_base + REG_UTP_TASK_REQ_LIST_BASE_H)); + + /* Initialize unipro link startup procedure */ + return ufshcd_dme_link_startup(hba); +} + +/** + * ufshcd_uic_cc_handler - handle UIC command completion + * @work: pointer to a work queue structure + * + * Returns 0 on success, non-zero value on failure + */ +static void ufshcd_uic_cc_handler (struct work_struct *work) +{ + struct ufs_hba *hba; + + hba = container_of(work, struct ufs_hba, uic_workq); + + if ((hba->active_uic_cmd.command == UIC_CMD_DME_LINK_STARTUP) && + !(ufshcd_get_uic_cmd_result(hba))) { + + if (ufshcd_make_hba_operational(hba)) + dev_err(&hba->pdev->dev, + "cc: hba not operational state\n"); + return; + } +} + +/** + * ufshcd_sl_intr - Interrupt service routine + * @hba: per adapter instance + * @intr_status: contains interrupts generated by the controller + */ +static void ufshcd_sl_intr(struct ufs_hba *hba, u32 intr_status) +{ + if (intr_status & UIC_COMMAND_COMPL) + schedule_work(&hba->uic_workq); +} + +/** + * ufshcd_intr - Main interrupt service routine + * @irq: irq number + * @__hba: pointer to adapter instance + * + * Returns IRQ_HANDLED - If interrupt is valid + * IRQ_NONE - If invalid interrupt + */ +static irqreturn_t ufshcd_intr(int irq, void *__hba) +{ + u32 intr_status; + irqreturn_t retval = IRQ_NONE; + struct ufs_hba *hba = __hba; + + spin_lock(hba->host->host_lock); + intr_status = readl(hba->mmio_base + REG_INTERRUPT_STATUS); + + if (intr_status) { + ufshcd_sl_intr(hba, intr_status); + + /* If UFSHCI 1.0 then clear interrupt status register */ + if (hba->ufs_version == UFSHCI_VERSION_10) + writel(intr_status, + (hba->mmio_base + REG_INTERRUPT_STATUS)); + retval = IRQ_HANDLED; + } + spin_unlock(hba->host->host_lock); + return retval; +} + +static struct scsi_host_template ufshcd_driver_template = { + .module = THIS_MODULE, + .name = UFSHCD, + .proc_name = UFSHCD, + .this_id = -1, +}; + +/** + * ufshcd_shutdown - main function to put the controller in reset state + * @pdev: pointer to PCI device handle + */ +static void ufshcd_shutdown(struct pci_dev *pdev) +{ + ufshcd_hba_stop((struct ufs_hba *)pci_get_drvdata(pdev)); +} + +#ifdef CONFIG_PM +/** + * ufshcd_suspend - suspend power management function + * @pdev: pointer to PCI device handle + * @state: power state + * + * Returns -ENOSYS + */ +static int ufshcd_suspend(struct pci_dev *pdev, pm_message_t state) +{ + /* + * TODO: + * 1. Block SCSI requests from SCSI midlayer + * 2. Change the internal driver state to non operational + * 3. Set UTRLRSR and UTMRLRSR bits to zero + * 4. Wait until outstanding commands are completed + * 5. Set HCE to zero to send the UFS host controller to reset state + */ + + return -ENOSYS; +} + +/** + * ufshcd_resume - resume power management function + * @pdev: pointer to PCI device handle + * + * Returns -ENOSYS + */ +static int ufshcd_resume(struct pci_dev *pdev) +{ + /* + * TODO: + * 1. Set HCE to 1, to start the UFS host controller + * initialization process + * 2. Set UTRLRSR and UTMRLRSR bits to 1 + * 3. Change the internal driver state to operational + * 4. Unblock SCSI requests from SCSI midlayer + */ + + return -ENOSYS; +} +#endif /* CONFIG_PM */ + +/** + * ufshcd_hba_free - free allocated memory for + * host memory space data structures + * @hba: per adapter instance + */ +static void ufshcd_hba_free(struct ufs_hba *hba) +{ + iounmap(hba->mmio_base); + ufshcd_free_hba_memory(hba); + pci_release_regions(hba->pdev); +} + +/** + * ufshcd_remove - de-allocate PCI/SCSI host and host memory space + * data structure memory + * @pdev - pointer to PCI handle + */ +static void ufshcd_remove(struct pci_dev *pdev) +{ + struct ufs_hba *hba = pci_get_drvdata(pdev); + + /* disable interrupts */ + ufshcd_int_config(hba, UFSHCD_INT_DISABLE); + free_irq(pdev->irq, hba); + + ufshcd_hba_stop(hba); + ufshcd_hba_free(hba); + + scsi_remove_host(hba->host); + scsi_host_put(hba->host); + pci_set_drvdata(pdev, NULL); + pci_clear_master(pdev); + pci_disable_device(pdev); +} + +/** + * ufshcd_set_dma_mask - Set dma mask based on the controller + * addressing capability + * @pdev: PCI device structure + * + * Returns 0 for success, non-zero for failure + */ +static int ufshcd_set_dma_mask(struct ufs_hba *hba) +{ + int err; + u64 dma_mask; + + /* + * If controller supports 64 bit addressing mode, then set the DMA + * mask to 64-bit, else set the DMA mask to 32-bit + */ + if (hba->capabilities & MASK_64_ADDRESSING_SUPPORT) + dma_mask = DMA_BIT_MASK(64); + else + dma_mask = DMA_BIT_MASK(32); + + err = pci_set_dma_mask(hba->pdev, dma_mask); + if (err) + return err; + + err = pci_set_consistent_dma_mask(hba->pdev, dma_mask); + + return err; +} + +/** + * ufshcd_probe - probe routine of the driver + * @pdev: pointer to PCI device handle + * @id: PCI device id + * + * Returns 0 on success, non-zero value on failure + */ +static int __devinit +ufshcd_probe(struct pci_dev *pdev, const struct pci_device_id *id) +{ + struct Scsi_Host *host; + struct ufs_hba *hba; + int err; + + err = pci_enable_device(pdev); + if (err) { + dev_err(&pdev->dev, "pci_enable_device failed\n"); + goto out_error; + } + + pci_set_master(pdev); + + host = scsi_host_alloc(&ufshcd_driver_template, + sizeof(struct ufs_hba)); + if (!host) { + dev_err(&pdev->dev, "scsi_host_alloc failed\n"); + err = -ENOMEM; + goto out_disable; + } + hba = shost_priv(host); + + err = pci_request_regions(pdev, UFSHCD); + if (err < 0) { + dev_err(&pdev->dev, "request regions failed\n"); + goto out_disable; + } + + hba->mmio_base = pci_ioremap_bar(pdev, 0); + if (!hba->mmio_base) { + dev_err(&pdev->dev, "memory map failed\n"); + err = -ENOMEM; + goto out_release_regions; + } + + hba->host = host; + hba->pdev = pdev; + + /* Read capabilities registers */ + ufshcd_hba_capabilities(hba); + + /* Get UFS version supported by the controller */ + hba->ufs_version = ufshcd_get_ufs_version(hba); + + err = ufshcd_set_dma_mask(hba); + if (err) { + dev_err(&pdev->dev, "set dma mask failed\n"); + goto out_iounmap; + } + + /* Allocate memory for host memory space */ + err = ufshcd_memory_alloc(hba); + if (err) { + dev_err(&pdev->dev, "Memory allocation failed\n"); + goto out_iounmap; + } + + /* Configure LRB */ + ufshcd_host_memory_configure(hba); + + host->can_queue = hba->nutrs; + host->max_id = UFSHCD_MAX_ID; + host->max_lun = UFSHCD_MAX_LUNS; + host->max_channel = UFSHCD_MAX_CHANNEL; + host->unique_id = host->host_no; + + /* Initialize work queues */ + INIT_WORK(&hba->uic_workq, ufshcd_uic_cc_handler); + + /* IRQ registration */ + err = request_irq(pdev->irq, ufshcd_intr, IRQF_SHARED, UFSHCD, hba); + if (err) { + dev_err(&pdev->dev, "request irq failed\n"); + goto out_lrb_free; + } + + pci_set_drvdata(pdev, hba); + + err = scsi_add_host(host, &pdev->dev); + if (err) { + dev_err(&pdev->dev, "scsi_add_host failed\n"); + goto out_free_irq; + } + + /* Initialization routine */ + err = ufshcd_initialize_hba(hba); + if (err) { + dev_err(&pdev->dev, "Initialization failed\n"); + goto out_free_irq; + } + + return 0; + +out_free_irq: + free_irq(pdev->irq, hba); +out_lrb_free: + ufshcd_free_hba_memory(hba); +out_iounmap: + iounmap(hba->mmio_base); +out_release_regions: + pci_release_regions(pdev); +out_disable: + scsi_host_put(host); + pci_clear_master(pdev); + pci_disable_device(pdev); +out_error: + return err; +} + +static DEFINE_PCI_DEVICE_TABLE(ufshcd_pci_tbl) = { + { PCI_VENDOR_ID_SAMSUNG, 0xC00C, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, + { } /* terminate list */ +}; + +MODULE_DEVICE_TABLE(pci, ufshcd_pci_tbl); + +static struct pci_driver ufshcd_pci_driver = { + .name = UFSHCD, + .id_table = ufshcd_pci_tbl, + .probe = ufshcd_probe, + .remove = __devexit_p(ufshcd_remove), + .shutdown = ufshcd_shutdown, +#ifdef CONFIG_PM + .suspend = ufshcd_suspend, + .resume = ufshcd_resume, +#endif +}; + +/** + * ufshcd_init - Driver registration routine + */ +static int __init ufshcd_init(void) +{ + return pci_register_driver(&ufshcd_pci_driver); +} +module_init(ufshcd_init); + +/** + * ufshcd_exit - Driver exit clean-up routine + */ +static void __exit ufshcd_exit(void) +{ + pci_unregister_driver(&ufshcd_pci_driver); +} +module_exit(ufshcd_exit); + + +MODULE_AUTHOR("Santosh Yaragnavi , " + "Vinayak Holikatti "); +MODULE_DESCRIPTION("Generic UFS host controller driver"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(UFSHCD_DRIVER_VERSION); diff --git a/drivers/scsi/ufs/ufshci.h b/drivers/scsi/ufs/ufshci.h new file mode 100644 index 0000000..6e3510f --- /dev/null +++ b/drivers/scsi/ufs/ufshci.h @@ -0,0 +1,376 @@ +/* + * Universal Flash Storage Host controller driver + * + * This code is based on drivers/scsi/ufs/ufshci.h + * Copyright (C) 2011-2012 Samsung India Software Operations + * + * Santosh Yaraganavi + * Vinayak Holikatti + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * NO WARRANTY + * THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR + * CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT + * LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT, + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is + * solely responsible for determining the appropriateness of using and + * distributing the Program and assumes all risks associated with its + * exercise of rights under this Agreement, including but not limited to + * the risks and costs of program errors, damage to or loss of data, + * programs or equipment, and unavailability or interruption of operations. + + * DISCLAIMER OF LIABILITY + * NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR + * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE + * USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED + * HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES + + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, + * USA. + */ + +#ifndef _UFSHCI_H +#define _UFSHCI_H + +enum { + TASK_REQ_UPIU_SIZE_DWORDS = 8, + TASK_RSP_UPIU_SIZE_DWORDS = 8, + ALIGNED_UPIU_SIZE = 128, +}; + +/* UFSHCI Registers */ +enum { + REG_CONTROLLER_CAPABILITIES = 0x00, + REG_UFS_VERSION = 0x08, + REG_CONTROLLER_DEV_ID = 0x10, + REG_CONTROLLER_PROD_ID = 0x14, + REG_INTERRUPT_STATUS = 0x20, + REG_INTERRUPT_ENABLE = 0x24, + REG_CONTROLLER_STATUS = 0x30, + REG_CONTROLLER_ENABLE = 0x34, + REG_UIC_ERROR_CODE_PHY_ADAPTER_LAYER = 0x38, + REG_UIC_ERROR_CODE_DATA_LINK_LAYER = 0x3C, + REG_UIC_ERROR_CODE_NETWORK_LAYER = 0x40, + REG_UIC_ERROR_CODE_TRANSPORT_LAYER = 0x44, + REG_UIC_ERROR_CODE_DME = 0x48, + REG_UTP_TRANSFER_REQ_INT_AGG_CONTROL = 0x4C, + REG_UTP_TRANSFER_REQ_LIST_BASE_L = 0x50, + REG_UTP_TRANSFER_REQ_LIST_BASE_H = 0x54, + REG_UTP_TRANSFER_REQ_DOOR_BELL = 0x58, + REG_UTP_TRANSFER_REQ_LIST_CLEAR = 0x5C, + REG_UTP_TRANSFER_REQ_LIST_RUN_STOP = 0x60, + REG_UTP_TASK_REQ_LIST_BASE_L = 0x70, + REG_UTP_TASK_REQ_LIST_BASE_H = 0x74, + REG_UTP_TASK_REQ_DOOR_BELL = 0x78, + REG_UTP_TASK_REQ_LIST_CLEAR = 0x7C, + REG_UTP_TASK_REQ_LIST_RUN_STOP = 0x80, + REG_UIC_COMMAND = 0x90, + REG_UIC_COMMAND_ARG_1 = 0x94, + REG_UIC_COMMAND_ARG_2 = 0x98, + REG_UIC_COMMAND_ARG_3 = 0x9C, +}; + +/* Controller capability masks */ +enum { + MASK_TRANSFER_REQUESTS_SLOTS = 0x0000001F, + MASK_TASK_MANAGEMENT_REQUEST_SLOTS = 0x00070000, + MASK_64_ADDRESSING_SUPPORT = 0x01000000, + MASK_OUT_OF_ORDER_DATA_DELIVERY_SUPPORT = 0x02000000, + MASK_UIC_DME_TEST_MODE_SUPPORT = 0x04000000, +}; + +/* UFS Version 08h */ +#define MINOR_VERSION_NUM_MASK UFS_MASK(0xFFFF, 0) +#define MAJOR_VERSION_NUM_MASK UFS_MASK(0xFFFF, 16) + +/* Controller UFSHCI version */ +enum { + UFSHCI_VERSION_10 = 0x00010000, + UFSHCI_VERSION_11 = 0x00010100, +}; + +/* + * HCDDID - Host Controller Identification Descriptor + * - Device ID and Device Class 10h + */ +#define DEVICE_CLASS UFS_MASK(0xFFFF, 0) +#define DEVICE_ID UFS_MASK(0xFF, 24) + +/* + * HCPMID - Host Controller Identification Descriptor + * - Product/Manufacturer ID 14h + */ +#define MANUFACTURE_ID_MASK UFS_MASK(0xFFFF, 0) +#define PRODUCT_ID_MASK UFS_MASK(0xFFFF, 16) + +#define UFS_BIT(x) (1L << (x)) + +#define UTP_TRANSFER_REQ_COMPL UFS_BIT(0) +#define UIC_DME_END_PT_RESET UFS_BIT(1) +#define UIC_ERROR UFS_BIT(2) +#define UIC_TEST_MODE UFS_BIT(3) +#define UIC_POWER_MODE UFS_BIT(4) +#define UIC_HIBERNATE_EXIT UFS_BIT(5) +#define UIC_HIBERNATE_ENTER UFS_BIT(6) +#define UIC_LINK_LOST UFS_BIT(7) +#define UIC_LINK_STARTUP UFS_BIT(8) +#define UTP_TASK_REQ_COMPL UFS_BIT(9) +#define UIC_COMMAND_COMPL UFS_BIT(10) +#define DEVICE_FATAL_ERROR UFS_BIT(11) +#define CONTROLLER_FATAL_ERROR UFS_BIT(16) +#define SYSTEM_BUS_FATAL_ERROR UFS_BIT(17) + +#define UFSHCD_ERROR_MASK (UIC_ERROR |\ + DEVICE_FATAL_ERROR |\ + CONTROLLER_FATAL_ERROR |\ + SYSTEM_BUS_FATAL_ERROR) + +#define INT_FATAL_ERRORS (DEVICE_FATAL_ERROR |\ + CONTROLLER_FATAL_ERROR |\ + SYSTEM_BUS_FATAL_ERROR) + +/* HCS - Host Controller Status 30h */ +#define DEVICE_PRESENT UFS_BIT(0) +#define UTP_TRANSFER_REQ_LIST_READY UFS_BIT(1) +#define UTP_TASK_REQ_LIST_READY UFS_BIT(2) +#define UIC_COMMAND_READY UFS_BIT(3) +#define HOST_ERROR_INDICATOR UFS_BIT(4) +#define DEVICE_ERROR_INDICATOR UFS_BIT(5) +#define UIC_POWER_MODE_CHANGE_REQ_STATUS_MASK UFS_MASK(0x7, 8) + +/* HCE - Host Controller Enable 34h */ +#define CONTROLLER_ENABLE UFS_BIT(0) +#define CONTROLLER_DISABLE 0x0 + +/* UECPA - Host UIC Error Code PHY Adapter Layer 38h */ +#define UIC_PHY_ADAPTER_LAYER_ERROR UFS_BIT(31) +#define UIC_PHY_ADAPTER_LAYER_ERROR_CODE_MASK 0x1F + +/* UECDL - Host UIC Error Code Data Link Layer 3Ch */ +#define UIC_DATA_LINK_LAYER_ERROR UFS_BIT(31) +#define UIC_DATA_LINK_LAYER_ERROR_CODE_MASK 0x7FFF +#define UIC_DATA_LINK_LAYER_ERROR_PA_INIT 0x2000 + +/* UECN - Host UIC Error Code Network Layer 40h */ +#define UIC_NETWORK_LAYER_ERROR UFS_BIT(31) +#define UIC_NETWORK_LAYER_ERROR_CODE_MASK 0x7 + +/* UECT - Host UIC Error Code Transport Layer 44h */ +#define UIC_TRANSPORT_LAYER_ERROR UFS_BIT(31) +#define UIC_TRANSPORT_LAYER_ERROR_CODE_MASK 0x7F + +/* UECDME - Host UIC Error Code DME 48h */ +#define UIC_DME_ERROR UFS_BIT(31) +#define UIC_DME_ERROR_CODE_MASK 0x1 + +#define INT_AGGR_TIMEOUT_VAL_MASK 0xFF +#define INT_AGGR_COUNTER_THRESHOLD_MASK UFS_MASK(0x1F, 8) +#define INT_AGGR_COUNTER_AND_TIMER_RESET UFS_BIT(16) +#define INT_AGGR_STATUS_BIT UFS_BIT(20) +#define INT_AGGR_PARAM_WRITE UFS_BIT(24) +#define INT_AGGR_ENABLE UFS_BIT(31) + +/* UTRLRSR - UTP Transfer Request Run-Stop Register 60h */ +#define UTP_TRANSFER_REQ_LIST_RUN_STOP_BIT UFS_BIT(0) + +/* UTMRLRSR - UTP Task Management Request Run-Stop Register 80h */ +#define UTP_TASK_REQ_LIST_RUN_STOP_BIT UFS_BIT(0) + +/* UICCMD - UIC Command */ +#define COMMAND_OPCODE_MASK 0xFF +#define GEN_SELECTOR_INDEX_MASK 0xFFFF + +#define MIB_ATTRIBUTE_MASK UFS_MASK(0xFFFF, 16) +#define RESET_LEVEL 0xFF + +#define ATTR_SET_TYPE_MASK UFS_MASK(0xFF, 16) +#define CONFIG_RESULT_CODE_MASK 0xFF +#define GENERIC_ERROR_CODE_MASK 0xFF + +/* UIC Commands */ +enum { + UIC_CMD_DME_GET = 0x01, + UIC_CMD_DME_SET = 0x02, + UIC_CMD_DME_PEER_GET = 0x03, + UIC_CMD_DME_PEER_SET = 0x04, + UIC_CMD_DME_POWERON = 0x10, + UIC_CMD_DME_POWEROFF = 0x11, + UIC_CMD_DME_ENABLE = 0x12, + UIC_CMD_DME_RESET = 0x14, + UIC_CMD_DME_END_PT_RST = 0x15, + UIC_CMD_DME_LINK_STARTUP = 0x16, + UIC_CMD_DME_HIBER_ENTER = 0x17, + UIC_CMD_DME_HIBER_EXIT = 0x18, + UIC_CMD_DME_TEST_MODE = 0x1A, +}; + +/* UIC Config result code / Generic error code */ +enum { + UIC_CMD_RESULT_SUCCESS = 0x00, + UIC_CMD_RESULT_INVALID_ATTR = 0x01, + UIC_CMD_RESULT_FAILURE = 0x01, + UIC_CMD_RESULT_INVALID_ATTR_VALUE = 0x02, + UIC_CMD_RESULT_READ_ONLY_ATTR = 0x03, + UIC_CMD_RESULT_WRITE_ONLY_ATTR = 0x04, + UIC_CMD_RESULT_BAD_INDEX = 0x05, + UIC_CMD_RESULT_LOCKED_ATTR = 0x06, + UIC_CMD_RESULT_BAD_TEST_FEATURE_INDEX = 0x07, + UIC_CMD_RESULT_PEER_COMM_FAILURE = 0x08, + UIC_CMD_RESULT_BUSY = 0x09, + UIC_CMD_RESULT_DME_FAILURE = 0x0A, +}; + +#define MASK_UIC_COMMAND_RESULT 0xFF + +#define INT_AGGR_COUNTER_THRESHOLD_VALUE (0x1F << 8) +#define INT_AGGR_TIMEOUT_VALUE (0x02) + +/* Interrupt disable masks */ +enum { + /* Interrupt disable mask for UFSHCI v1.0 */ + INTERRUPT_DISABLE_MASK_10 = 0xFFFF, + + /* Interrupt disable mask for UFSHCI v1.1 */ + INTERRUPT_DISABLE_MASK_11 = 0x0, +}; + +/* + * Request Descriptor Definitions + */ + +/* Transfer request command type */ +enum { + UTP_CMD_TYPE_SCSI = 0x0, + UTP_CMD_TYPE_UFS = 0x1, + UTP_CMD_TYPE_DEV_MANAGE = 0x2, +}; + +enum { + UTP_SCSI_COMMAND = 0x00000000, + UTP_NATIVE_UFS_COMMAND = 0x10000000, + UTP_DEVICE_MANAGEMENT_FUNCTION = 0x20000000, + UTP_REQ_DESC_INT_CMD = 0x01000000, +}; + +/* UTP Transfer Request Data Direction (DD) */ +enum { + UTP_NO_DATA_TRANSFER = 0x00000000, + UTP_HOST_TO_DEVICE = 0x02000000, + UTP_DEVICE_TO_HOST = 0x04000000, +}; + +/* Overall command status values */ +enum { + OCS_SUCCESS = 0x0, + OCS_INVALID_CMD_TABLE_ATTR = 0x1, + OCS_INVALID_PRDT_ATTR = 0x2, + OCS_MISMATCH_DATA_BUF_SIZE = 0x3, + OCS_MISMATCH_RESP_UPIU_SIZE = 0x4, + OCS_PEER_COMM_FAILURE = 0x5, + OCS_ABORTED = 0x6, + OCS_FATAL_ERROR = 0x7, + OCS_INVALID_COMMAND_STATUS = 0x0F, + MASK_OCS = 0x0F, +}; + +/** + * struct ufshcd_sg_entry - UFSHCI PRD Entry + * @base_addr: Lower 32bit physical address DW-0 + * @upper_addr: Upper 32bit physical address DW-1 + * @reserved: Reserved for future use DW-2 + * @size: size of physical segment DW-3 + */ +struct ufshcd_sg_entry { + u32 base_addr; + u32 upper_addr; + u32 reserved; + u32 size; +}; + +/** + * struct utp_transfer_cmd_desc - UFS Command Descriptor structure + * @command_upiu: Command UPIU Frame address + * @response_upiu: Response UPIU Frame address + * @prd_table: Physical Region Descriptor + */ +struct utp_transfer_cmd_desc { + u8 command_upiu[ALIGNED_UPIU_SIZE]; + u8 response_upiu[ALIGNED_UPIU_SIZE]; + struct ufshcd_sg_entry prd_table[SG_ALL]; +}; + +/** + * struct request_desc_header - Descriptor Header common to both UTRD and UTMRD + * @dword0: Descriptor Header DW0 + * @dword1: Descriptor Header DW1 + * @dword2: Descriptor Header DW2 + * @dword3: Descriptor Header DW3 + */ +struct request_desc_header { + u32 dword_0; + u32 dword_1; + u32 dword_2; + u32 dword_3; +}; + +/** + * struct utp_transfer_req_desc - UTRD structure + * @header: UTRD header DW-0 to DW-3 + * @command_desc_base_addr_lo: UCD base address low DW-4 + * @command_desc_base_addr_hi: UCD base address high DW-5 + * @response_upiu_length: response UPIU length DW-6 + * @response_upiu_offset: response UPIU offset DW-6 + * @prd_table_length: Physical region descriptor length DW-7 + * @prd_table_offset: Physical region descriptor offset DW-7 + */ +struct utp_transfer_req_desc { + + /* DW 0-3 */ + struct request_desc_header header; + + /* DW 4-5*/ + u32 command_desc_base_addr_lo; + u32 command_desc_base_addr_hi; + + /* DW 6 */ + u16 response_upiu_length; + u16 response_upiu_offset; + + /* DW 7 */ + u16 prd_table_length; + u16 prd_table_offset; +}; + +/** + * struct utp_task_req_desc - UTMRD structure + * @header: UTMRD header DW-0 to DW-3 + * @task_req_upiu: Pointer to task request UPIU DW-4 to DW-11 + * @task_rsp_upiu: Pointer to task response UPIU DW12 to DW-19 + */ +struct utp_task_req_desc { + + /* DW 0-3 */ + struct request_desc_header header; + + /* DW 4-11 */ + u32 task_req_upiu[TASK_REQ_UPIU_SIZE_DWORDS]; + + /* DW 12-19 */ + u32 task_rsp_upiu[TASK_RSP_UPIU_SIZE_DWORDS]; +}; + +#endif /* End of Header */