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[111.241.103.134]) by smtp.gmail.com with ESMTPSA id gd14sm1250191pjb.31.2020.10.14.21.15.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Oct 2020 21:15:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sifive.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=Htn/B8k+1/JpRIVNx3cFS6HMpNPM26t880PCz9769ik=; b=jt1v3hzmh7qtX18sJtd3U6q6TydqJqpR94Fdubg03KVkWeboDwNN+ccek3O0EUSSJQ K8SrqSRpRPLF1YcejX96j4zkxcetrc4WGmeTaeoIQkyNqiL0gBjFBiAgkAm3P3z+Ytnk CXJFbd7Lg3vKUctmE7tt7fagqEotnqfTlSH1DGsBZkmAFbpazlZkzXLrB47T0fkk/CFI 4TA5lssF4MBDFzlnQatduttUpnWT/tFoabSSqi70uzoS4BMG7B4LHF9UtSMO1Ihp8Yry 0Rm3TesT08sVZEI/Q0KKtnirtnlzZ89jTSB7QqstCvPP4+7EhYBLGRZgeFGj+XvNcRhy Ts6Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=Htn/B8k+1/JpRIVNx3cFS6HMpNPM26t880PCz9769ik=; b=KIUR6qTJCGrBVcZHwA8c0i6WwOFqLG9S56DduEQeVCUxPjgjsyJUNDx+chBFZnI2i0 efkV8n1PL1OlTJItGwREag1mr2ZhdEQ5AVANPQQuOUC+h9S69B4f4lBkIGk2JOY0JxaW 9VLiutDMA3BJohD34L6mn+XB8ZqbHPBTUb6wkDEmXLAKNzn8haQBwFCfTrRhT+YS2QPy sWHS6ljbaNaXLT77NgoTC45vCfqJCcRxEhdGN2JgTteagUHx1/HMinY2taF0fxYxvjYh y+DxKDe4BCVM5EOor2nutMRm9GPtMSnoP2fQtqyce7IB6W14K/AWvOo79VmNJpQa7YwJ 5XAw== X-Gm-Message-State: AOAM532GswCHQ2lO0w5DTQ4GH5TPygaUz7YlgeU9QbsXu1Bq7xSTRPZW BEKsSGwk1LI5hGYFDGs/EWQ3FwggnQXypKOd X-Google-Smtp-Source: ABdhPJxZKLyd6nBG7vk+OLdDnl7AH1knA36A4fllD6CbW9htrJRBXszIRALJerV9pj3DgQdW+vYL2g== X-Received: by 2002:a17:90b:30d2:: with SMTP id hi18mr2552799pjb.86.1602735311314; Wed, 14 Oct 2020 21:15:11 -0700 (PDT) From: Green Wan To: Subject: [RFC PATCH v7 2/2] hw/misc/sifive_u_otp: Add backend drive support Date: Thu, 15 Oct 2020 12:14:24 +0800 Message-Id: <20201015041424.23090-3-green.wan@sifive.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201015041424.23090-1-green.wan@sifive.com> References: <20201015041424.23090-1-green.wan@sifive.com> Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::1044; envelope-from=green.wan@sifive.com; helo=mail-pj1-x1044.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alistair23@gmail.com, bmeng.cn@gmail.com, qemu-riscv@nongnu.org, qemu-devel@nongnu.org, green.wan@sifive.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Add '-drive' support to OTP device. Allow users to assign a raw file as OTP image. test commands for 16k otp.img filled with zero: $ dd if=3D/dev/zero of=3D./otp.img bs=3D1k count=3D16 $ ./qemu-system-riscv64 -M sifive_u -m 256M -nographic -bios none \ -kernel ../opensbi/build/platform/sifive/fu540/firmware/fw_payload.elf \ -d guest_errors -drive if=3Dnone,format=3Draw,file=3Dotp.img Signed-off-by: Green Wan Reviewed-by: Bin Meng Tested-by: Bin Meng --- hw/misc/sifive_u_otp.c | 67 +++++++++++++++++++++++++++++++++- include/hw/misc/sifive_u_otp.h | 2 + 2 files changed, 68 insertions(+), 1 deletion(-) diff --git a/hw/misc/sifive_u_otp.c b/hw/misc/sifive_u_otp.c index 565eec082f..60066375ab 100644 --- a/hw/misc/sifive_u_otp.c +++ b/hw/misc/sifive_u_otp.c @@ -19,11 +19,14 @@ */ =20 #include "qemu/osdep.h" +#include "qapi/error.h" #include "hw/qdev-properties.h" #include "hw/sysbus.h" #include "qemu/log.h" #include "qemu/module.h" #include "hw/misc/sifive_u_otp.h" +#include "sysemu/blockdev.h" +#include "sysemu/block-backend.h" =20 #define WRITTEN_BIT_ON 0x1 =20 @@ -54,6 +57,16 @@ static uint64_t sifive_u_otp_read(void *opaque, hwaddr a= ddr, unsigned int size) if ((s->pce & SIFIVE_U_OTP_PCE_EN) && (s->pdstb & SIFIVE_U_OTP_PDSTB_EN) && (s->ptrim & SIFIVE_U_OTP_PTRIM_EN)) { + + /* read from backend */ + if (s->blk) { + int32_t buf; + + blk_pread(s->blk, s->pa * SIFIVE_U_OTP_FUSE_WORD, &buf, + SIFIVE_U_OTP_FUSE_WORD); + return buf; + } + return s->fuse[s->pa & SIFIVE_U_OTP_PA_MASK]; } else { return 0xff; @@ -137,7 +150,7 @@ static void sifive_u_otp_write(void *opaque, hwaddr add= r, if (s->pwe && !s->pas) { if (GET_FUSEARRAY_BIT(s->fuse_wo, s->pa, s->paio)) { qemu_log_mask(LOG_GUEST_ERROR, - "Error: write idx<%u>, bit<%u>\n", + "write once error: idx<%u>, bit<%u>\n", s->pa, s->paio); break; } @@ -145,6 +158,12 @@ static void sifive_u_otp_write(void *opaque, hwaddr ad= dr, /* write bit data */ SET_FUSEARRAY_BIT(s->fuse, s->pa, s->paio, s->pdin); =20 + /* write to backend */ + if (s->blk) { + blk_pwrite(s->blk, s->pa * SIFIVE_U_OTP_FUSE_WORD, + &s->fuse[s->pa], SIFIVE_U_OTP_FUSE_WORD, 0); + } + /* update written bit */ SET_FUSEARRAY_BIT(s->fuse_wo, s->pa, s->paio, WRITTEN_BIT_ON); } @@ -168,16 +187,48 @@ static const MemoryRegionOps sifive_u_otp_ops =3D { =20 static Property sifive_u_otp_properties[] =3D { DEFINE_PROP_UINT32("serial", SiFiveUOTPState, serial, 0), + DEFINE_PROP_DRIVE("drive", SiFiveUOTPState, blk), DEFINE_PROP_END_OF_LIST(), }; =20 static void sifive_u_otp_realize(DeviceState *dev, Error **errp) { SiFiveUOTPState *s =3D SIFIVE_U_OTP(dev); + DriveInfo *dinfo; =20 memory_region_init_io(&s->mmio, OBJECT(dev), &sifive_u_otp_ops, s, TYPE_SIFIVE_U_OTP, SIFIVE_U_OTP_REG_SIZE); sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->mmio); + + dinfo =3D drive_get_next(IF_NONE); + if (dinfo) { + int ret; + uint64_t perm; + int filesize; + BlockBackend *blk; + + blk =3D blk_by_legacy_dinfo(dinfo); + filesize =3D SIFIVE_U_OTP_NUM_FUSES * SIFIVE_U_OTP_FUSE_WORD; + if (blk_getlength(blk) < filesize) { + error_setg(errp, "OTP drive size < 16K"); + return; + } + + qdev_prop_set_drive_err(dev, "drive", blk, errp); + + if (s->blk) { + perm =3D BLK_PERM_CONSISTENT_READ | + (blk_is_read_only(s->blk) ? 0 : BLK_PERM_WRITE); + ret =3D blk_set_perm(s->blk, perm, BLK_PERM_ALL, errp); + if (ret < 0) { + return; + } + + if (blk_pread(s->blk, 0, s->fuse, filesize) !=3D filesize) { + error_setg(errp, "failed to read the initial flash content= "); + } + } + } } =20 static void sifive_u_otp_reset(DeviceState *dev) @@ -191,6 +242,20 @@ static void sifive_u_otp_reset(DeviceState *dev) s->fuse[SIFIVE_U_OTP_SERIAL_ADDR] =3D s->serial; s->fuse[SIFIVE_U_OTP_SERIAL_ADDR + 1] =3D ~(s->serial); =20 + if (s->blk) { + /* Put serial number to backend as well*/ + uint32_t serial_data; + int index =3D SIFIVE_U_OTP_SERIAL_ADDR; + + serial_data =3D s->serial; + blk_pwrite(s->blk, index * SIFIVE_U_OTP_FUSE_WORD, + &serial_data, SIFIVE_U_OTP_FUSE_WORD, 0); + + serial_data =3D ~(s->serial); + blk_pwrite(s->blk, (index + 1) * SIFIVE_U_OTP_FUSE_WORD, + &serial_data, SIFIVE_U_OTP_FUSE_WORD, 0); + } + /* Initialize write-once map */ memset(s->fuse_wo, 0x00, sizeof(s->fuse_wo)); } diff --git a/include/hw/misc/sifive_u_otp.h b/include/hw/misc/sifive_u_otp.h index ebffbc1fa5..5d0d7df455 100644 --- a/include/hw/misc/sifive_u_otp.h +++ b/include/hw/misc/sifive_u_otp.h @@ -46,6 +46,7 @@ =20 #define SIFIVE_U_OTP_PA_MASK 0xfff #define SIFIVE_U_OTP_NUM_FUSES 0x1000 +#define SIFIVE_U_OTP_FUSE_WORD 4 #define SIFIVE_U_OTP_SERIAL_ADDR 0xfc =20 #define SIFIVE_U_OTP_REG_SIZE 0x1000 @@ -80,6 +81,7 @@ struct SiFiveUOTPState { uint32_t fuse_wo[SIFIVE_U_OTP_NUM_FUSES]; /* config */ uint32_t serial; + BlockBackend *blk; }; =20 #endif /* HW_SIFIVE_U_OTP_H */ --=20 2.17.1