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Thu, 26 Oct 2023 16:47:46 +0000 (GMT) Received: from smtpav05.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7A6FD58043; Thu, 26 Oct 2023 16:47:45 +0000 (GMT) Received: from gfwa153.aus.stglabs.ibm.com (unknown [9.3.84.127]) by smtpav05.wdc07v.mail.ibm.com (Postfix) with ESMTP; Thu, 26 Oct 2023 16:47:45 +0000 (GMT) From: Ninad Palsule To: qemu-devel@nongnu.org, clg@kaod.org, peter.maydell@linaro.org, andrew@codeconstruct.com.au, joel@jms.id.au, pbonzini@redhat.com, marcandre.lureau@redhat.com, berrange@redhat.com, thuth@redhat.com, philmd@linaro.org, lvivier@redhat.com Cc: Ninad Palsule , qemu-arm@nongnu.org, Andrew Jeffery Subject: [PATCH v7 02/10] hw/fsi: Introduce IBM's scratchpad Date: Thu, 26 Oct 2023 11:47:33 -0500 Message-Id: <20231026164741.1184058-3-ninad@linux.ibm.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231026164741.1184058-1-ninad@linux.ibm.com> References: <20231026164741.1184058-1-ninad@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: J9CTFFJBgxbu3ojTAEf7Kzp6zhh3P87F X-Proofpoint-ORIG-GUID: kAuV8QXMzq3e2pAfeCPrYbn2F79Oa4hL X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.987,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-10-26_14,2023-10-26_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=945 clxscore=1015 adultscore=0 priorityscore=1501 mlxscore=0 bulkscore=0 phishscore=0 impostorscore=0 malwarescore=0 spamscore=0 suspectscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2310170001 definitions=main-2310260145 Received-SPF: pass client-ip=148.163.158.5; envelope-from=ninad@linux.ibm.com; helo=mx0b-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org This is a part of patchset where scratchpad is introduced. The scratchpad provides a set of non-functional registers. The firmware is free to use them, hardware does not support any special management support. The scratchpad registers can be read or written from LBUS slave. In this model, The LBUS device is parent for the scratchpad. Signed-off-by: Andrew Jeffery Signed-off-by: Ninad Palsule --- v2: - Incorporated Joel's review comments. v5: - Incorporated review comments by Cedric. v6: - Incorporated review comments by Daniel. v7: - Incorporated review comments by Philippe. - Cleaned up unused bits. --- meson.build | 1 + hw/fsi/trace.h | 1 + include/hw/fsi/engine-scratchpad.h | 27 +++++++++ include/hw/fsi/fsi.h | 16 +++++ hw/fsi/engine-scratchpad.c | 93 ++++++++++++++++++++++++++++++ hw/fsi/Kconfig | 4 ++ hw/fsi/meson.build | 1 + hw/fsi/trace-events | 2 + 8 files changed, 145 insertions(+) create mode 100644 hw/fsi/trace.h create mode 100644 include/hw/fsi/engine-scratchpad.h create mode 100644 include/hw/fsi/fsi.h create mode 100644 hw/fsi/engine-scratchpad.c create mode 100644 hw/fsi/trace-events diff --git a/meson.build b/meson.build index dcef8b1e79..793c7c1f20 100644 --- a/meson.build +++ b/meson.build @@ -3257,6 +3257,7 @@ if have_system 'hw/char', 'hw/display', 'hw/dma', + 'hw/fsi', 'hw/hyperv', 'hw/i2c', 'hw/i386', diff --git a/hw/fsi/trace.h b/hw/fsi/trace.h new file mode 100644 index 0000000000..ee67c7fb04 --- /dev/null +++ b/hw/fsi/trace.h @@ -0,0 +1 @@ +#include "trace/trace-hw_fsi.h" diff --git a/include/hw/fsi/engine-scratchpad.h b/include/hw/fsi/engine-scratchpad.h new file mode 100644 index 0000000000..4ffa871965 --- /dev/null +++ b/include/hw/fsi/engine-scratchpad.h @@ -0,0 +1,27 @@ +/* + * SPDX-License-Identifier: GPL-2.0-or-later + * Copyright (C) 2023 IBM Corp. + * + * IBM scratchpad engne + */ +#ifndef FSI_ENGINE_SCRATCHPAD_H +#define FSI_ENGINE_SCRATCHPAD_H + +#include "hw/fsi/lbus.h" +#include "hw/fsi/fsi.h" + +#define ENGINE_CONFIG_NEXT BE_BIT(0) +#define ENGINE_CONFIG_TYPE_PEEK (0x02 << 4) +#define ENGINE_CONFIG_TYPE_FSI (0x03 << 4) +#define ENGINE_CONFIG_TYPE_SCRATCHPAD (0x06 << 4) + +#define TYPE_FSI_SCRATCHPAD "fsi.scratchpad" +#define SCRATCHPAD(obj) OBJECT_CHECK(FSIScratchPad, (obj), TYPE_FSI_SCRATCHPAD) + +typedef struct FSIScratchPad { + FSILBusDevice parent; + + uint32_t reg; +} FSIScratchPad; + +#endif /* FSI_ENGINE_SCRATCHPAD_H */ diff --git a/include/hw/fsi/fsi.h b/include/hw/fsi/fsi.h new file mode 100644 index 0000000000..b08b97f62b --- /dev/null +++ b/include/hw/fsi/fsi.h @@ -0,0 +1,16 @@ +/* + * SPDX-License-Identifier: GPL-2.0-or-later + * Copyright (C) 2023 IBM Corp. + * + * IBM Flexible Service Interface + */ +#ifndef FSI_FSI_H +#define FSI_FSI_H + +#include "qemu/bitops.h" + +/* Bitwise operations at the word level. */ +#define BE_BIT(x) BIT(31 - (x)) +#define BE_GENMASK(hb, lb) MAKE_64BIT_MASK((lb), ((hb) - (lb) + 1)) + +#endif diff --git a/hw/fsi/engine-scratchpad.c b/hw/fsi/engine-scratchpad.c new file mode 100644 index 0000000000..a8887cd613 --- /dev/null +++ b/hw/fsi/engine-scratchpad.c @@ -0,0 +1,93 @@ +/* + * SPDX-License-Identifier: GPL-2.0-or-later + * Copyright (C) 2023 IBM Corp. + * + * IBM scratchpad engine + */ + +#include "qemu/osdep.h" + +#include "qapi/error.h" +#include "qemu/log.h" +#include "trace.h" + +#include "hw/fsi/engine-scratchpad.h" + +static uint64_t fsi_scratchpad_read(void *opaque, hwaddr addr, unsigned size) +{ + FSIScratchPad *s = SCRATCHPAD(opaque); + + trace_fsi_scratchpad_read(addr, size); + + if (addr) { + return 0; + } + + return s->reg; +} + +static void fsi_scratchpad_write(void *opaque, hwaddr addr, uint64_t data, + unsigned size) +{ + FSIScratchPad *s = SCRATCHPAD(opaque); + + trace_fsi_scratchpad_write(addr, size, data); + + if (addr) { + return; + } + + s->reg = data; +} + +static const struct MemoryRegionOps scratchpad_ops = { + .read = fsi_scratchpad_read, + .write = fsi_scratchpad_write, + .endianness = DEVICE_BIG_ENDIAN, +}; + +static void fsi_scratchpad_realize(DeviceState *dev, Error **errp) +{ + FSILBusDevice *ldev = FSI_LBUS_DEVICE(dev); + + memory_region_init_io(&ldev->iomem, OBJECT(ldev), &scratchpad_ops, + ldev, TYPE_FSI_SCRATCHPAD, 0x400); +} + +static void fsi_scratchpad_reset(DeviceState *dev) +{ + FSIScratchPad *s = SCRATCHPAD(dev); + + s->reg = 0; +} + +static void fsi_scratchpad_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + FSILBusDeviceClass *ldc = FSI_LBUS_DEVICE_CLASS(klass); + + dc->realize = fsi_scratchpad_realize; + dc->reset = fsi_scratchpad_reset; + + ldc->config = + ENGINE_CONFIG_NEXT | /* valid */ + 0x00010000 | /* slots */ + 0x00001000 | /* version */ + ENGINE_CONFIG_TYPE_SCRATCHPAD | /* type */ + 0x00000007; /* crc */ +} + +static const TypeInfo fsi_scratchpad_info = { + .name = TYPE_FSI_SCRATCHPAD, + .parent = TYPE_FSI_LBUS_DEVICE, + .instance_size = sizeof(FSIScratchPad), + .class_init = fsi_scratchpad_class_init, + .class_size = sizeof(FSILBusDeviceClass), +}; + +static void fsi_scratchpad_register_types(void) +{ + type_register_static(&fsi_scratchpad_info); +} + +type_init(fsi_scratchpad_register_types); diff --git a/hw/fsi/Kconfig b/hw/fsi/Kconfig index e650c660f0..f7c7fd1b28 100644 --- a/hw/fsi/Kconfig +++ b/hw/fsi/Kconfig @@ -1,2 +1,6 @@ +config FSI_SCRATCHPAD + bool + select FSI_LBUS + config FSI_LBUS bool diff --git a/hw/fsi/meson.build b/hw/fsi/meson.build index 4074d3a7d2..d45a98c223 100644 --- a/hw/fsi/meson.build +++ b/hw/fsi/meson.build @@ -1 +1,2 @@ system_ss.add(when: 'CONFIG_FSI_LBUS', if_true: files('lbus.c')) +system_ss.add(when: 'CONFIG_FSI_SCRATCHPAD', if_true: files('engine-scratchpad.c')) diff --git a/hw/fsi/trace-events b/hw/fsi/trace-events new file mode 100644 index 0000000000..c5753e2791 --- /dev/null +++ b/hw/fsi/trace-events @@ -0,0 +1,2 @@ +fsi_scratchpad_read(uint64_t addr, uint32_t size) "@0x%" PRIx64 " size=%d" +fsi_scratchpad_write(uint64_t addr, uint32_t size, uint64_t data) "@0x%" PRIx64 " size=%d value=0x%"PRIx64