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Sat, 21 Oct 2023 21:17:24 +0000 (GMT) Received: from smtpav05.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D9CA05806A; Sat, 21 Oct 2023 21:17:23 +0000 (GMT) Received: from gfwa153.aus.stglabs.ibm.com (unknown [9.3.84.127]) by smtpav05.dal12v.mail.ibm.com (Postfix) with ESMTP; Sat, 21 Oct 2023 21:17:23 +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 v6 03/10] hw/fsi: Introduce IBM's cfam,fsi-slave Date: Sat, 21 Oct 2023 16:17:12 -0500 Message-Id: <20231021211720.3571082-4-ninad@linux.ibm.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231021211720.3571082-1-ninad@linux.ibm.com> References: <20231021211720.3571082-1-ninad@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: eFi89cdCfqep3en8BJ_WHXa21VnXjGEY X-Proofpoint-GUID: CK6MAnVSgtpdloBv_c2B-FDTl9I87luN X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.980,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-10-21_13,2023-10-19_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 malwarescore=0 phishscore=0 priorityscore=1501 spamscore=0 mlxscore=0 impostorscore=0 bulkscore=0 suspectscore=0 mlxlogscore=999 adultscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2310170001 definitions=main-2310210195 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 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. Signed-off-by: Andrew Jeffery Signed-off-by: Ninad Palsule --- v2: - Incorporated Joel's review comments. v3: - Incorporated Thomas Huth's review comments. v5: - Incorporated review comments by Cedric. v6: - Incorporated review comments by Cedric & Daniel --- include/hw/fsi/cfam.h | 34 ++++++++ include/hw/fsi/fsi-slave.h | 29 +++++++ include/hw/fsi/fsi.h | 21 +++++ hw/fsi/cfam.c | 173 +++++++++++++++++++++++++++++++++++++ hw/fsi/fsi-slave.c | 96 ++++++++++++++++++++ hw/fsi/Kconfig | 9 ++ hw/fsi/meson.build | 2 + hw/fsi/trace-events | 7 ++ 8 files changed, 371 insertions(+) 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..842a3bad0c --- /dev/null +++ b/include/hw/fsi/cfam.h @@ -0,0 +1,34 @@ +/* + * 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_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; +} 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 e65f26f17b..14bc19279f 100644 --- a/include/hw/fsi/fsi.h +++ b/include/hw/fsi/fsi.h @@ -7,10 +7,31 @@ #ifndef FSI_FSI_H #define FSI_FSI_H +#include "hw/qdev-core.h" + +/* + * TODO: Maybe unwind this dependency with const links? Store a + * pointer in FSIBus? + */ +#include "hw/fsi/cfam.h" + /* Bitwise operations at the word level. */ #define BE_BIT(x) BIT(31 - (x)) #define GENMASK(t, b) \ (((1ULL << ((t) + 1)) - 1) & ~((1ULL << (b)) - 1)) #define BE_GENMASK(t, b) GENMASK(BE_BIT(t), BE_BIT(b)) +#define TYPE_FSI_BUS "fsi.bus" +OBJECT_DECLARE_SIMPLE_TYPE(FSIBus, FSI_BUS) + +/* TODO: Figure out what's best with a point-to-point bus */ +typedef struct FSISlaveState FSISlaveState; + +typedef struct FSIBus { + BusState bus; + + /* XXX: It's point-to-point, just instantiate the slave directly for now */ + FSICFAMState slave; +} FSIBus; + #endif diff --git a/hw/fsi/cfam.c b/hw/fsi/cfam.c new file mode 100644 index 0000000000..a1c037925f --- /dev/null +++ b/hw/fsi/cfam.c @@ -0,0 +1,173 @@ +/* + * 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/fsi/engine-scratchpad.h" + +#include "hw/qdev-properties.h" + +#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 size) +{ + FSICFAMState *cfam = 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 = 0xc; + QTAILQ_FOREACH(kid, &cfam->lbus.bus.children, sibling) { + if (i == addr) { + DeviceState *ds = kid->child; + FSILBusDevice *dev = FSI_LBUS_DEVICE(ds); + return FSI_LBUS_DEVICE_GET_CLASS(dev)->config; + } + i += size; + } + + if (i == 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 = 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 == 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 = { + .read = fsi_cfam_config_read, + .write = fsi_cfam_config_write, + .valid.max_access_size = 4, + .valid.min_access_size = 4, + .impl.max_access_size = 4, + .impl.min_access_size = 4, + .endianness = 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 = { + .read = fsi_cfam_unimplemented_read, + .write = fsi_cfam_unimplemented_write, + .endianness = DEVICE_BIG_ENDIAN, +}; + +static void fsi_cfam_realize(DeviceState *dev, Error **errp) +{ + FSICFAMState *cfam = FSI_CFAM(dev); + FSISlaveState *slave = 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, 0x400); + + if (!object_property_set_bool(OBJECT(&cfam->lbus), "realized", true, + errp)) { + return; + } + + 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 */ + lbus_create_device(&cfam->lbus, TYPE_FSI_SCRATCHPAD, 0); +} + +static void fsi_cfam_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + dc->bus_type = TYPE_FSI_BUS; + dc->realize = fsi_cfam_realize; +} + +static const TypeInfo fsi_cfam_info = { + .name = TYPE_FSI_CFAM, + .parent = TYPE_FSI_SLAVE, + .instance_size = sizeof(FSICFAMState), + .class_init = fsi_cfam_class_init, +}; + +static void fsi_cfam_register_types(void) +{ + 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..d81842209e --- /dev/null +++ b/hw/fsi/fsi-slave.c @@ -0,0 +1,96 @@ +/* + * 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) + +#define FSI_SMODE TO_REG(0x00) +#define FSI_SMODE_WSTART BE_BIT(0) +#define FSI_SMODE_AUX_EN BE_BIT(1) +#define FSI_SMODE_SLAVE_ID BE_GENMASK(6, 7) +#define FSI_SMODE_ECHO_DELAY BE_GENMASK(8, 11) +#define FSI_SMODE_SEND_DELAY BE_GENMASK(12, 15) +#define FSI_SMODE_LBUS_DIV BE_GENMASK(20, 23) +#define FSI_SMODE_BRIEF_LEFT BE_GENMASK(24, 27) +#define FSI_SMODE_BRIEF_RIGHT BE_GENMASK(28, 31) + +#define FSI_SDMA TO_REG(0x04) +#define FSI_SISC TO_REG(0x08) +#define FSI_SCISC TO_REG(0x08) +#define FSI_SISM TO_REG(0x0c) +#define FSI_SISS TO_REG(0x10) +#define FSI_SSISM TO_REG(0x10) +#define FSI_SCISM TO_REG(0x14) + +static uint64_t fsi_slave_read(void *opaque, hwaddr addr, unsigned size) +{ + FSISlaveState *s = 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 = 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)] = data; +} + +static const struct MemoryRegionOps fsi_slave_ops = { + .read = fsi_slave_read, + .write = fsi_slave_write, + .endianness = DEVICE_BIG_ENDIAN, +}; + +static void fsi_slave_init(Object *o) +{ + FSISlaveState *s = 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 = { + .name = TYPE_FSI_SLAVE, + .parent = TYPE_DEVICE, + .instance_init = fsi_slave_init, + .instance_size = 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 f7c7fd1b28..8d712e77ed 100644 --- a/hw/fsi/Kconfig +++ b/hw/fsi/Kconfig @@ -1,3 +1,12 @@ +config FSI_CFAM + bool + select FSI + select FSI_SCRATCHPAD + select FSI_LBUS + +config FSI + bool + config FSI_SCRATCHPAD bool select FSI_LBUS diff --git a/hw/fsi/meson.build b/hw/fsi/meson.build index d45a98c223..a9e7cd4099 100644 --- a/hw/fsi/meson.build +++ b/hw/fsi/meson.build @@ -1,2 +1,4 @@ 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')) +system_ss.add(when: 'CONFIG_FSI_CFAM', if_true: files('cfam.c')) +system_ss.add(when: 'CONFIG_FSI', if_true: files('fsi-slave.c')) diff --git a/hw/fsi/trace-events b/hw/fsi/trace-events index c5753e2791..b57b2dcc86 100644 --- a/hw/fsi/trace-events +++ b/hw/fsi/trace-events @@ -1,2 +1,9 @@ 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 +fsi_cfam_config_read(uint64_t addr, uint32_t size) "@0x%" PRIx64 " size=%d" +fsi_cfam_config_write(uint64_t addr, uint32_t size, uint64_t data) "@0x%" PRIx64 " size=%d value=0x%"PRIx64 +fsi_cfam_unimplemented_read(uint64_t addr, uint32_t size) "@0x%" PRIx64 " size=%d" +fsi_cfam_unimplemented_write(uint64_t addr, uint32_t size, uint64_t data) "@0x%" PRIx64 " size=%d value=0x%"PRIx64 +fsi_cfam_config_write_noaddr(uint64_t addr, uint32_t size, uint64_t data) "@0x%" PRIx64 " size=%d value=0x%"PRIx64 +fsi_slave_read(uint64_t addr, uint32_t size) "@0x%" PRIx64 " size=%d" +fsi_slave_write(uint64_t addr, uint32_t size, uint64_t data) "@0x%" PRIx64 " size=%d value=0x%"PRIx64