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b=D2qYS3gFkiLYFlT2TcUfRUEPUwEW5NMzS+WT1rL9NSsMSy7fs8e0V9C3pZ5eOyGpfgtB FuOsbvQ8gIYRkpGZ4pfPYBUkysv2zRdNVGMc4+yzMeP97bu7oEd8saouzyEq3/U+GHsp VCTjiQQvVfYKA+FB6BIenNyxTa9W0DGRmwAAMQg6KC+2+nv9eduQCuH05Stdzy4J6W49 pz5PWwm4SFo19iiKhtO0iwYF9zdZuBEW29BGAGtnQ+6IAZMPVQOgjv4cwZEsDdx1ExYx qOrR7Ta86aMfUdlWJGF4HPqj7OJAgs+YSBHX0sJ6N6xIlthGd6fMcQnbAFrBzZ6Gn1kB PQ== 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 v8 03/10] hw/fsi: Introduce IBM's cfam,fsi-slave,scratchpad Date: Tue, 28 Nov 2023 17:56:53 -0600 Message-Id: <20231128235700.599584-4-ninad@linux.ibm.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231128235700.599584-1-ninad@linux.ibm.com> References: <20231128235700.599584-1-ninad@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 7TiL_v70-OXVHaNbfQF5jF62y--tSUJX X-Proofpoint-ORIG-GUID: FO1Xm-isoEQtwf_5hcsCJXQNpqFormY6 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-28_25,2023-11-27_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 adultscore=0 priorityscore=1501 mlxscore=0 impostorscore=0 lowpriorityscore=0 suspectscore=0 phishscore=0 spamscore=0 clxscore=1015 malwarescore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311280188 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=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, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @ibm.com) X-ZM-MESSAGEID: 1701215948002000001 This is a part of patchset where IBM's Flexible Service Interface is introduced. The Common FRU Access Macro (CFAM), an address space containing various "engines" that drive accesses on busses internal and external to the POWER chip. Examples include the SBEFIFO and I2C masters. The engines hang off of an internal Local Bus (LBUS) which is described by the CFAM configuration block. The FSI slave: The slave is the terminal point of the FSI bus for FSI symbols addressed to it. Slaves can be cascaded off of one another. The slave's configuration registers appear in address space of the CFAM to which it is attached. 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. The scratch pad is managed under FSI CFAM state. Signed-off-by: Andrew Jeffery Signed-off-by: Ninad Palsule [ clg: - moved object FSIScratchPad under FSICFAMState - moved FSIScratchPad code under cfam.c - introduced fsi_cfam_instance_init() - reworked fsi_cfam_realize() ] Signed-off-by: C=C3=A9dric Le Goater --- include/hw/fsi/cfam.h | 45 +++++++ include/hw/fsi/fsi-slave.h | 29 +++++ include/hw/fsi/fsi.h | 5 + hw/fsi/cfam.c | 261 +++++++++++++++++++++++++++++++++++++ hw/fsi/fsi-slave.c | 78 +++++++++++ hw/fsi/Kconfig | 8 ++ hw/fsi/meson.build | 3 +- hw/fsi/trace-events | 10 +- 8 files changed, 437 insertions(+), 2 deletions(-) create mode 100644 include/hw/fsi/cfam.h create mode 100644 include/hw/fsi/fsi-slave.h create mode 100644 hw/fsi/cfam.c create mode 100644 hw/fsi/fsi-slave.c diff --git a/include/hw/fsi/cfam.h b/include/hw/fsi/cfam.h new file mode 100644 index 0000000000..9d3da727ff --- /dev/null +++ b/include/hw/fsi/cfam.h @@ -0,0 +1,45 @@ +/* + * SPDX-License-Identifier: GPL-2.0-or-later + * Copyright (C) 2023 IBM Corp. + * + * IBM Common FRU Access Macro + */ +#ifndef FSI_CFAM_H +#define FSI_CFAM_H + +#include "exec/memory.h" + +#include "hw/fsi/fsi-slave.h" +#include "hw/fsi/lbus.h" + + +#define TYPE_FSI_SCRATCHPAD "fsi.scratchpad" +#define SCRATCHPAD(obj) OBJECT_CHECK(FSIScratchPad, (obj), TYPE_FSI_SCRATC= HPAD) + +typedef struct FSIScratchPad { + FSILBusDevice parent; + + uint32_t reg; +} FSIScratchPad; + +#define TYPE_FSI_CFAM "cfam" +#define FSI_CFAM(obj) OBJECT_CHECK(FSICFAMState, (obj), TYPE_FSI_CFAM) + +/* P9-ism */ +#define CFAM_CONFIG_NR_REGS 0x28 + +typedef struct FSICFAMState { + /* < private > */ + FSISlaveState parent; + + /* CFAM config address space */ + MemoryRegion config_iomem; + + MemoryRegion mr; + AddressSpace as; + + FSILBus lbus; + FSIScratchPad scratchpad; +} FSICFAMState; + +#endif /* FSI_CFAM_H */ diff --git a/include/hw/fsi/fsi-slave.h b/include/hw/fsi/fsi-slave.h new file mode 100644 index 0000000000..f5f23f4457 --- /dev/null +++ b/include/hw/fsi/fsi-slave.h @@ -0,0 +1,29 @@ +/* + * SPDX-License-Identifier: GPL-2.0-or-later + * Copyright (C) 2023 IBM Corp. + * + * IBM Flexible Service Interface slave + */ +#ifndef FSI_FSI_SLAVE_H +#define FSI_FSI_SLAVE_H + +#include "exec/memory.h" +#include "hw/qdev-core.h" + +#include "hw/fsi/lbus.h" + +#include + +#define TYPE_FSI_SLAVE "fsi.slave" +OBJECT_DECLARE_SIMPLE_TYPE(FSISlaveState, FSI_SLAVE) + +#define FSI_SLAVE_CONTROL_NR_REGS ((0x40 >> 2) + 1) + +typedef struct FSISlaveState { + DeviceState parent; + + MemoryRegion iomem; + uint32_t regs[FSI_SLAVE_CONTROL_NR_REGS]; +} FSISlaveState; + +#endif /* FSI_FSI_H */ diff --git a/include/hw/fsi/fsi.h b/include/hw/fsi/fsi.h index a75e3e5bdc..af39f9b4ad 100644 --- a/include/hw/fsi/fsi.h +++ b/include/hw/fsi/fsi.h @@ -8,6 +8,11 @@ #define FSI_FSI_H =20 #include "hw/qdev-core.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)) =20 #define TYPE_FSI_BUS "fsi.bus" OBJECT_DECLARE_SIMPLE_TYPE(FSIBus, FSI_BUS) diff --git a/hw/fsi/cfam.c b/hw/fsi/cfam.c new file mode 100644 index 0000000000..5086a2c45c --- /dev/null +++ b/hw/fsi/cfam.c @@ -0,0 +1,261 @@ +/* + * SPDX-License-Identifier: GPL-2.0-or-later + * Copyright (C) 2023 IBM Corp. + * + * IBM Common FRU Access Macro + */ + +#include "qemu/osdep.h" + +#include "qapi/error.h" +#include "trace.h" + +#include "hw/fsi/cfam.h" +#include "hw/fsi/fsi.h" + +#include "hw/qdev-properties.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 TO_REG(x) ((x) >> 2) + +#define CFAM_ENGINE_CONFIG TO_REG(0x04) + +#define CFAM_CONFIG_CHIP_ID TO_REG(0x00) +#define CFAM_CONFIG_CHIP_ID_P9 0xc0022d15 +#define CFAM_CONFIG_CHIP_ID_BREAK 0xc0de0000 + +static uint64_t fsi_cfam_config_read(void *opaque, hwaddr addr, unsigned s= ize) +{ + FSICFAMState *cfam =3D FSI_CFAM(opaque); + BusChild *kid; + int i; + + trace_fsi_cfam_config_read(addr, size); + + switch (addr) { + case 0x00: + return CFAM_CONFIG_CHIP_ID_P9; + case 0x04: + return ENGINE_CONFIG_NEXT | /* valid */ + 0x00010000 | /* slots */ + 0x00001000 | /* version */ + ENGINE_CONFIG_TYPE_PEEK | /* type */ + 0x0000000c; /* crc */ + case 0x08: + return ENGINE_CONFIG_NEXT | /* valid */ + 0x00010000 | /* slots */ + 0x00005000 | /* version */ + ENGINE_CONFIG_TYPE_FSI | /* type */ + 0x0000000a; /* crc */ + break; + default: + /* The config table contains different engines from 0xc onwards. */ + i =3D 0xc; + QTAILQ_FOREACH(kid, &cfam->lbus.bus.children, sibling) { + if (i =3D=3D addr) { + DeviceState *ds =3D kid->child; + FSILBusDevice *dev =3D FSI_LBUS_DEVICE(ds); + return FSI_LBUS_DEVICE_GET_CLASS(dev)->config; + } + i +=3D size; + } + + if (i =3D=3D addr) { + return 0; + } + + /* + * As per FSI specification, This is a magic value at address 0 of + * given FSI port. This causes FSI master to send BREAK command for + * initialization and recovery. + */ + return CFAM_CONFIG_CHIP_ID_BREAK; + } +} + +static void fsi_cfam_config_write(void *opaque, hwaddr addr, uint64_t data, + unsigned size) +{ + FSICFAMState *cfam =3D FSI_CFAM(opaque); + + trace_fsi_cfam_config_write(addr, size, data); + + switch (TO_REG(addr)) { + case CFAM_CONFIG_CHIP_ID: + case CFAM_CONFIG_CHIP_ID + 4: + if (data =3D=3D CFAM_CONFIG_CHIP_ID_BREAK) { + bus_cold_reset(BUS(&cfam->lbus)); + } + break; + default: + trace_fsi_cfam_config_write_noaddr(addr, size, data); + } +} + +static const struct MemoryRegionOps cfam_config_ops =3D { + .read =3D fsi_cfam_config_read, + .write =3D fsi_cfam_config_write, + .valid.max_access_size =3D 4, + .valid.min_access_size =3D 4, + .impl.max_access_size =3D 4, + .impl.min_access_size =3D 4, + .endianness =3D DEVICE_BIG_ENDIAN, +}; + +static uint64_t fsi_cfam_unimplemented_read(void *opaque, hwaddr addr, + unsigned size) +{ + trace_fsi_cfam_unimplemented_read(addr, size); + + return 0; +} + +static void fsi_cfam_unimplemented_write(void *opaque, hwaddr addr, + uint64_t data, unsigned size) +{ + trace_fsi_cfam_unimplemented_write(addr, size, data); +} + +static const struct MemoryRegionOps fsi_cfam_unimplemented_ops =3D { + .read =3D fsi_cfam_unimplemented_read, + .write =3D fsi_cfam_unimplemented_write, + .endianness =3D DEVICE_BIG_ENDIAN, +}; + +static void fsi_cfam_instance_init(Object *obj) +{ + FSICFAMState *s =3D FSI_CFAM(obj); + + object_initialize_child(obj, "scratchpad", &s->scratchpad, + TYPE_FSI_SCRATCHPAD); +} + +static void fsi_cfam_realize(DeviceState *dev, Error **errp) +{ + FSICFAMState *cfam =3D FSI_CFAM(dev); + FSISlaveState *slave =3D FSI_SLAVE(dev); + + /* Each slave has a 2MiB address space */ + memory_region_init_io(&cfam->mr, OBJECT(cfam), &fsi_cfam_unimplemented= _ops, + cfam, TYPE_FSI_CFAM, 2 * 1024 * 1024); + address_space_init(&cfam->as, &cfam->mr, TYPE_FSI_CFAM); + + qbus_init(&cfam->lbus, sizeof(cfam->lbus), TYPE_FSI_LBUS, DEVICE(cfam), + NULL); + + memory_region_init_io(&cfam->config_iomem, OBJECT(cfam), &cfam_config_= ops, + cfam, TYPE_FSI_CFAM ".config", 0x400); + + memory_region_add_subregion(&cfam->mr, 0, &cfam->config_iomem); + memory_region_add_subregion(&cfam->mr, 0x800, &slave->iomem); + memory_region_add_subregion(&cfam->mr, 0xc00, &cfam->lbus.mr); + + /* Add scratchpad engine */ + if (!qdev_realize_and_unref(DEVICE(&cfam->scratchpad), BUS(&cfam->lbus= ), + errp)) { + return; + } + + /* TODO: clarify scratchpad mapping */ + FSILBusDevice *fsi_dev =3D FSI_LBUS_DEVICE(&cfam->scratchpad); + memory_region_add_subregion(&cfam->lbus.mr, 0, &fsi_dev->iomem); +} + +static void fsi_cfam_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc =3D DEVICE_CLASS(klass); + dc->bus_type =3D TYPE_FSI_BUS; + dc->realize =3D fsi_cfam_realize; +} + +static const TypeInfo fsi_cfam_info =3D { + .name =3D TYPE_FSI_CFAM, + .parent =3D TYPE_FSI_SLAVE, + .instance_init =3D fsi_cfam_instance_init, + .instance_size =3D sizeof(FSICFAMState), + .class_init =3D fsi_cfam_class_init, +}; + +static uint64_t fsi_scratchpad_read(void *opaque, hwaddr addr, unsigned si= ze) +{ + FSIScratchPad *s =3D 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 =3D SCRATCHPAD(opaque); + + trace_fsi_scratchpad_write(addr, size, data); + + if (addr) { + return; + } + + s->reg =3D data; +} + +static const struct MemoryRegionOps scratchpad_ops =3D { + .read =3D fsi_scratchpad_read, + .write =3D fsi_scratchpad_write, + .endianness =3D DEVICE_BIG_ENDIAN, +}; + +static void fsi_scratchpad_realize(DeviceState *dev, Error **errp) +{ + FSILBusDevice *ldev =3D 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 =3D SCRATCHPAD(dev); + + s->reg =3D 0; +} + +static void fsi_scratchpad_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc =3D DEVICE_CLASS(klass); + FSILBusDeviceClass *ldc =3D FSI_LBUS_DEVICE_CLASS(klass); + + dc->realize =3D fsi_scratchpad_realize; + dc->reset =3D fsi_scratchpad_reset; + + ldc->config =3D + ENGINE_CONFIG_NEXT | /* valid */ + 0x00010000 | /* slots */ + 0x00001000 | /* version */ + ENGINE_CONFIG_TYPE_SCRATCHPAD | /* type */ + 0x00000007; /* crc */ +} + +static const TypeInfo fsi_scratchpad_info =3D { + .name =3D TYPE_FSI_SCRATCHPAD, + .parent =3D TYPE_FSI_LBUS_DEVICE, + .instance_size =3D sizeof(FSIScratchPad), + .class_init =3D fsi_scratchpad_class_init, + .class_size =3D sizeof(FSILBusDeviceClass), +}; + +static void fsi_cfam_register_types(void) +{ + type_register_static(&fsi_scratchpad_info); + type_register_static(&fsi_cfam_info); +} + +type_init(fsi_cfam_register_types); diff --git a/hw/fsi/fsi-slave.c b/hw/fsi/fsi-slave.c new file mode 100644 index 0000000000..70386c0bb8 --- /dev/null +++ b/hw/fsi/fsi-slave.c @@ -0,0 +1,78 @@ +/* + * SPDX-License-Identifier: GPL-2.0-or-later + * Copyright (C) 2023 IBM Corp. + * + * IBM Flexible Service Interface slave + */ + +#include "qemu/osdep.h" + +#include "qapi/error.h" +#include "qemu/log.h" +#include "trace.h" + +#include "hw/fsi/fsi-slave.h" +#include "hw/fsi/fsi.h" + +#define TO_REG(x) ((x) >> 2) + +static uint64_t fsi_slave_read(void *opaque, hwaddr addr, unsigned size) +{ + FSISlaveState *s =3D FSI_SLAVE(opaque); + + trace_fsi_slave_read(addr, size); + + if (addr + size > sizeof(s->regs)) { + qemu_log_mask(LOG_GUEST_ERROR, + "%s: Out of bounds read: 0x%"HWADDR_PRIx" for %u\n", + __func__, addr, size); + return 0; + } + + return s->regs[TO_REG(addr)]; +} + +static void fsi_slave_write(void *opaque, hwaddr addr, uint64_t data, + unsigned size) +{ + FSISlaveState *s =3D FSI_SLAVE(opaque); + + trace_fsi_slave_write(addr, size, data); + + if (addr + size > sizeof(s->regs)) { + qemu_log_mask(LOG_GUEST_ERROR, + "%s: Out of bounds write: 0x%"HWADDR_PRIx" for %u\n", + __func__, addr, size); + return; + } + + s->regs[TO_REG(addr)] =3D data; +} + +static const struct MemoryRegionOps fsi_slave_ops =3D { + .read =3D fsi_slave_read, + .write =3D fsi_slave_write, + .endianness =3D DEVICE_BIG_ENDIAN, +}; + +static void fsi_slave_init(Object *o) +{ + FSISlaveState *s =3D FSI_SLAVE(o); + + memory_region_init_io(&s->iomem, OBJECT(s), &fsi_slave_ops, + s, TYPE_FSI_SLAVE, 0x400); +} + +static const TypeInfo fsi_slave_info =3D { + .name =3D TYPE_FSI_SLAVE, + .parent =3D TYPE_DEVICE, + .instance_init =3D fsi_slave_init, + .instance_size =3D sizeof(FSISlaveState), +}; + +static void fsi_slave_register_types(void) +{ + type_register_static(&fsi_slave_info); +} + +type_init(fsi_slave_register_types); diff --git a/hw/fsi/Kconfig b/hw/fsi/Kconfig index f4869c209f..de1594a335 100644 --- a/hw/fsi/Kconfig +++ b/hw/fsi/Kconfig @@ -1,3 +1,11 @@ +config FSI_CFAM + bool + select FSI + select FSI_LBUS + +config FSI + bool + config FSI bool =20 diff --git a/hw/fsi/meson.build b/hw/fsi/meson.build index 487fb31cbc..cafd009c6d 100644 --- a/hw/fsi/meson.build +++ b/hw/fsi/meson.build @@ -1,2 +1,3 @@ system_ss.add(when: 'CONFIG_FSI_LBUS', if_true: files('lbus.c')) -system_ss.add(when: 'CONFIG_FSI', if_true: files('fsi.c')) +system_ss.add(when: 'CONFIG_FSI_CFAM', if_true: files('cfam.c')) +system_ss.add(when: 'CONFIG_FSI', if_true: files('fsi.c','fsi-slave.c')) diff --git a/hw/fsi/trace-events b/hw/fsi/trace-events index 8b13789179..b57b2dcc86 100644 --- a/hw/fsi/trace-events +++ b/hw/fsi/trace-events @@ -1 +1,9 @@ - +fsi_scratchpad_read(uint64_t addr, uint32_t size) "@0x%" PRIx64 " size=3D%= d" +fsi_scratchpad_write(uint64_t addr, uint32_t size, uint64_t data) "@0x%" P= RIx64 " size=3D%d value=3D0x%"PRIx64 +fsi_cfam_config_read(uint64_t addr, uint32_t size) "@0x%" PRIx64 " size=3D= %d" +fsi_cfam_config_write(uint64_t addr, uint32_t size, uint64_t data) "@0x%" = PRIx64 " size=3D%d value=3D0x%"PRIx64 +fsi_cfam_unimplemented_read(uint64_t addr, uint32_t size) "@0x%" PRIx64 " = size=3D%d" +fsi_cfam_unimplemented_write(uint64_t addr, uint32_t size, uint64_t data) = "@0x%" PRIx64 " size=3D%d value=3D0x%"PRIx64 +fsi_cfam_config_write_noaddr(uint64_t addr, uint32_t size, uint64_t data) = "@0x%" PRIx64 " size=3D%d value=3D0x%"PRIx64 +fsi_slave_read(uint64_t addr, uint32_t size) "@0x%" PRIx64 " size=3D%d" +fsi_slave_write(uint64_t addr, uint32_t size, uint64_t data) "@0x%" PRIx64= " size=3D%d value=3D0x%"PRIx64 --=20 2.39.2