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Thu, 26 Oct 2023 16:47:50 +0000 (GMT) Received: from smtpav05.wdc07v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 58F4B58043; Thu, 26 Oct 2023 16:47:49 +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 16:47:49 +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 06/10] hw/fsi: Aspeed APB2OPB interface Date: Thu, 26 Oct 2023 11:47:37 -0500 Message-Id: <20231026164741.1184058-7-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: RUjyw66tHMOgdCX_URFzOGvxSvUS5GSt X-Proofpoint-ORIG-GUID: z8JS_U0E-1S87wJFfHzWUjdU9-sgwOmS 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_15,2023-10-26_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 priorityscore=1501 mlxscore=0 impostorscore=0 malwarescore=0 mlxlogscore=805 clxscore=1015 bulkscore=0 adultscore=0 spamscore=0 suspectscore=0 phishscore=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 IBM's Flexible Service Interface is introduced. An APB-to-OPB bridge enabling access to the OPB from the ARM core in the AST2600. Hardware limitations prevent the OPB from being directly mapped into APB, so all accesses are indirect through the bridge. Signed-off-by: Andrew Jeffery Signed-off-by: Ninad Palsule --- v2: - Incorporated review comments by Joel v3: - Incorporated review comments by Thomas Huth v4: - Compile FSI with ASPEED_SOC only. v5: - Incorporated review comments by Cedric. v6: - Incorporated review comments by Cedric. v7: - Incorporated review comments by Cedric. --- include/hw/fsi/aspeed-apb2opb.h | 33 ++++ hw/fsi/aspeed-apb2opb.c | 272 ++++++++++++++++++++++++++++++++ hw/arm/Kconfig | 1 + hw/fsi/Kconfig | 4 + hw/fsi/meson.build | 1 + hw/fsi/trace-events | 2 + 6 files changed, 313 insertions(+) create mode 100644 include/hw/fsi/aspeed-apb2opb.h create mode 100644 hw/fsi/aspeed-apb2opb.c diff --git a/include/hw/fsi/aspeed-apb2opb.h b/include/hw/fsi/aspeed-apb2opb.h new file mode 100644 index 0000000000..a81ae67023 --- /dev/null +++ b/include/hw/fsi/aspeed-apb2opb.h @@ -0,0 +1,33 @@ +/* + * SPDX-License-Identifier: GPL-2.0-or-later + * Copyright (C) 2023 IBM Corp. + * + * ASPEED APB2OPB Bridge + */ +#ifndef FSI_ASPEED_APB2OPB_H +#define FSI_ASPEED_APB2OPB_H + +#include "hw/sysbus.h" +#include "hw/fsi/opb.h" + +#define TYPE_ASPEED_APB2OPB "aspeed.apb2opb" +OBJECT_DECLARE_SIMPLE_TYPE(AspeedAPB2OPBState, ASPEED_APB2OPB) + +#define ASPEED_APB2OPB_NR_REGS ((0xe8 >> 2) + 1) + +#define ASPEED_FSI_NUM 2 + +typedef struct AspeedAPB2OPBState { + /*< private >*/ + SysBusDevice parent_obj; + + /*< public >*/ + MemoryRegion iomem; + + uint32_t regs[ASPEED_APB2OPB_NR_REGS]; + qemu_irq irq; + + OPBus opb[ASPEED_FSI_NUM]; +} AspeedAPB2OPBState; + +#endif /* FSI_ASPEED_APB2OPB_H */ diff --git a/hw/fsi/aspeed-apb2opb.c b/hw/fsi/aspeed-apb2opb.c new file mode 100644 index 0000000000..4cac62a38f --- /dev/null +++ b/hw/fsi/aspeed-apb2opb.c @@ -0,0 +1,272 @@ +/* + * SPDX-License-Identifier: GPL-2.0-or-later + * Copyright (C) 2023 IBM Corp. + * + * ASPEED APB-OPB FSI interface + */ + +#include "qemu/osdep.h" +#include "qemu/log.h" +#include "qom/object.h" +#include "qapi/error.h" +#include "trace.h" + +#include "hw/fsi/aspeed-apb2opb.h" +#include "hw/qdev-core.h" + +#define TO_REG(x) (x >> 2) + +#define APB2OPB_VERSION TO_REG(0x00) +#define APB2OPB_TRIGGER TO_REG(0x04) + +#define APB2OPB_CONTROL TO_REG(0x08) +#define APB2OPB_CONTROL_OFF BE_GENMASK(31, 13) + +#define APB2OPB_OPB2FSI TO_REG(0x0c) +#define APB2OPB_OPB2FSI_OFF BE_GENMASK(31, 22) + +#define APB2OPB_OPB0_SEL TO_REG(0x10) +#define APB2OPB_OPB1_SEL TO_REG(0x28) +#define APB2OPB_OPB_SEL_EN BIT(0) + +#define APB2OPB_OPB0_MODE TO_REG(0x14) +#define APB2OPB_OPB1_MODE TO_REG(0x2c) +#define APB2OPB_OPB_MODE_RD BIT(0) + +#define APB2OPB_OPB0_XFER TO_REG(0x18) +#define APB2OPB_OPB1_XFER TO_REG(0x30) +#define APB2OPB_OPB_XFER_FULL BIT(1) +#define APB2OPB_OPB_XFER_HALF BIT(0) + +#define APB2OPB_OPB0_ADDR TO_REG(0x1c) +#define APB2OPB_OPB0_WRITE_DATA TO_REG(0x20) + +#define APB2OPB_OPB1_ADDR TO_REG(0x34) +#define APB2OPB_OPB1_WRITE_DATA TO_REG(0x38) + +#define APB2OPB_IRQ_STS TO_REG(0x48) +#define APB2OPB_IRQ_STS_OPB1_TX_ACK BIT(17) +#define APB2OPB_IRQ_STS_OPB0_TX_ACK BIT(16) + +#define APB2OPB_OPB0_WRITE_WORD_ENDIAN TO_REG(0x4c) +#define APB2OPB_OPB0_WRITE_WORD_ENDIAN_BE 0x0011101b +#define APB2OPB_OPB0_WRITE_BYTE_ENDIAN TO_REG(0x50) +#define APB2OPB_OPB0_WRITE_BYTE_ENDIAN_BE 0x0c330f3f +#define APB2OPB_OPB1_WRITE_WORD_ENDIAN TO_REG(0x54) +#define APB2OPB_OPB1_WRITE_BYTE_ENDIAN TO_REG(0x58) +#define APB2OPB_OPB0_READ_BYTE_ENDIAN TO_REG(0x5c) +#define APB2OPB_OPB1_READ_BYTE_ENDIAN TO_REG(0x60) +#define APB2OPB_OPB0_READ_WORD_ENDIAN_BE 0x00030b1b + +#define APB2OPB_OPB0_READ_DATA TO_REG(0x84) +#define APB2OPB_OPB1_READ_DATA TO_REG(0x90) + +/* + * The following magic values came from AST2600 data sheet + * The register values are defined under section "FSI controller" + * as initial values. + */ +static const uint32_t aspeed_apb2opb_reset[ASPEED_APB2OPB_NR_REGS] = { + [APB2OPB_VERSION] = 0x000000a1, + [APB2OPB_OPB0_WRITE_WORD_ENDIAN] = 0x0044eee4, + [APB2OPB_OPB0_WRITE_BYTE_ENDIAN] = 0x0055aaff, + [APB2OPB_OPB1_WRITE_WORD_ENDIAN] = 0x00117717, + [APB2OPB_OPB1_WRITE_BYTE_ENDIAN] = 0xffaa5500, + [APB2OPB_OPB0_READ_BYTE_ENDIAN] = 0x0044eee4, + [APB2OPB_OPB1_READ_BYTE_ENDIAN] = 0x00117717 +}; + +static void fsi_opb_fsi_master_address(OPBus *opb, hwaddr addr) +{ + memory_region_transaction_begin(); + memory_region_set_address(&opb->fsi.iomem, addr); + memory_region_transaction_commit(); +} + +static void fsi_opb_opb2fsi_address(OPBus *opb, hwaddr addr) +{ + memory_region_transaction_begin(); + memory_region_set_address(&opb->fsi.opb2fsi, addr); + memory_region_transaction_commit(); +} + +static uint64_t fsi_aspeed_apb2opb_read(void *opaque, hwaddr addr, + unsigned size) +{ + AspeedAPB2OPBState *s = ASPEED_APB2OPB(opaque); + unsigned int reg = TO_REG(addr); + + trace_fsi_aspeed_apb2opb_read(addr, size); + + if (reg >= ASPEED_APB2OPB_NR_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[reg]; +} + +static void fsi_aspeed_apb2opb_write(void *opaque, hwaddr addr, uint64_t data, + unsigned size) +{ + AspeedAPB2OPBState *s = ASPEED_APB2OPB(opaque); + unsigned int reg = TO_REG(addr); + + trace_fsi_aspeed_apb2opb_write(addr, size, data); + + if (reg >= ASPEED_APB2OPB_NR_REGS) { + qemu_log_mask(LOG_GUEST_ERROR, + "%s: Out of bounds write: %"HWADDR_PRIx" for %u\n", + __func__, addr, size); + return; + } + + switch (reg) { + case APB2OPB_CONTROL: + fsi_opb_fsi_master_address(&s->opb[0], data & APB2OPB_CONTROL_OFF); + break; + case APB2OPB_OPB2FSI: + fsi_opb_opb2fsi_address(&s->opb[0], data & APB2OPB_OPB2FSI_OFF); + break; + case APB2OPB_OPB0_WRITE_WORD_ENDIAN: + if (data != APB2OPB_OPB0_WRITE_WORD_ENDIAN_BE) { + qemu_log_mask(LOG_GUEST_ERROR, + "%s: Bridge needs to be driven as BE (0x%x)\n", + __func__, APB2OPB_OPB0_WRITE_WORD_ENDIAN_BE); + } + break; + case APB2OPB_OPB0_WRITE_BYTE_ENDIAN: + if (data != APB2OPB_OPB0_WRITE_BYTE_ENDIAN_BE) { + qemu_log_mask(LOG_GUEST_ERROR, + "%s: Bridge needs to be driven as BE (0x%x)\n", + __func__, APB2OPB_OPB0_WRITE_BYTE_ENDIAN_BE); + } + break; + case APB2OPB_OPB0_READ_BYTE_ENDIAN: + if (data != APB2OPB_OPB0_READ_WORD_ENDIAN_BE) { + qemu_log_mask(LOG_GUEST_ERROR, + "%s: Bridge needs to be driven as BE (0x%x)\n", + __func__, APB2OPB_OPB0_READ_WORD_ENDIAN_BE); + } + break; + case APB2OPB_TRIGGER: + { + uint32_t opb, op_mode, op_size, op_addr, op_data; + MemTxResult result; + bool is_write; + int index; + AddressSpace *as; + + assert((s->regs[APB2OPB_OPB0_SEL] & APB2OPB_OPB_SEL_EN) ^ + (s->regs[APB2OPB_OPB1_SEL] & APB2OPB_OPB_SEL_EN)); + + if (s->regs[APB2OPB_OPB0_SEL] & APB2OPB_OPB_SEL_EN) { + opb = 0; + op_mode = s->regs[APB2OPB_OPB0_MODE]; + op_size = s->regs[APB2OPB_OPB0_XFER]; + op_addr = s->regs[APB2OPB_OPB0_ADDR]; + op_data = s->regs[APB2OPB_OPB0_WRITE_DATA]; + } else if (s->regs[APB2OPB_OPB1_SEL] & APB2OPB_OPB_SEL_EN) { + opb = 1; + op_mode = s->regs[APB2OPB_OPB1_MODE]; + op_size = s->regs[APB2OPB_OPB1_XFER]; + op_addr = s->regs[APB2OPB_OPB1_ADDR]; + op_data = s->regs[APB2OPB_OPB1_WRITE_DATA]; + } else { + qemu_log_mask(LOG_GUEST_ERROR, + "%s: Invalid operation: 0x%"HWADDR_PRIx" for %u\n", + __func__, addr, size); + return; + } + + if (op_size & ~(APB2OPB_OPB_XFER_HALF | APB2OPB_OPB_XFER_FULL)) { + qemu_log_mask(LOG_GUEST_ERROR, + "OPB transaction failed: Unrecognized access width: %d\n", + op_size); + return; + } + + op_size += 1; + is_write = !(op_mode & APB2OPB_OPB_MODE_RD); + index = opb ? APB2OPB_OPB1_READ_DATA : APB2OPB_OPB0_READ_DATA; + as = &s->opb[opb].as; + + result = address_space_rw(as, op_addr, MEMTXATTRS_UNSPECIFIED, + &op_data, op_size, is_write); + if (result != MEMTX_OK) { + qemu_log_mask(LOG_GUEST_ERROR, "%s: OPB %s failed @%08x\n", + __func__, is_write ? "write" : "read", op_addr); + return; + } + + if (!is_write) { + s->regs[index] = op_data; + } + + s->regs[APB2OPB_IRQ_STS] |= opb ? APB2OPB_IRQ_STS_OPB1_TX_ACK + : APB2OPB_IRQ_STS_OPB0_TX_ACK; + break; + } + } + + s->regs[reg] = data; +} + +static const struct MemoryRegionOps aspeed_apb2opb_ops = { + .read = fsi_aspeed_apb2opb_read, + .write = fsi_aspeed_apb2opb_write, + .valid.max_access_size = 4, + .valid.min_access_size = 4, + .impl.max_access_size = 4, + .impl.min_access_size = 4, + .endianness = DEVICE_LITTLE_ENDIAN, +}; + +static void fsi_aspeed_apb2opb_realize(DeviceState *dev, Error **errp) +{ + SysBusDevice *sbd = SYS_BUS_DEVICE(dev); + AspeedAPB2OPBState *s = ASPEED_APB2OPB(dev); + + qbus_init(&s->opb[0], sizeof(s->opb[0]), TYPE_OP_BUS, + DEVICE(s), NULL); + qbus_init(&s->opb[1], sizeof(s->opb[1]), TYPE_OP_BUS, + DEVICE(s), NULL); + + sysbus_init_irq(sbd, &s->irq); + + memory_region_init_io(&s->iomem, OBJECT(s), &aspeed_apb2opb_ops, s, + TYPE_ASPEED_APB2OPB, 0x1000); + sysbus_init_mmio(sbd, &s->iomem); +} + +static void fsi_aspeed_apb2opb_reset(DeviceState *dev) +{ + AspeedAPB2OPBState *s = ASPEED_APB2OPB(dev); + + memcpy(s->regs, aspeed_apb2opb_reset, ASPEED_APB2OPB_NR_REGS); +} + +static void fsi_aspeed_apb2opb_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->desc = "ASPEED APB2OPB Bridge"; + dc->realize = fsi_aspeed_apb2opb_realize; + dc->reset = fsi_aspeed_apb2opb_reset; +} + +static const TypeInfo aspeed_apb2opb_info = { + .name = TYPE_ASPEED_APB2OPB, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(AspeedAPB2OPBState), + .class_init = fsi_aspeed_apb2opb_class_init, +}; + +static void aspeed_apb2opb_register_types(void) +{ + type_register_static(&aspeed_apb2opb_info); +} + +type_init(aspeed_apb2opb_register_types); diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig index 7e68348440..d963de74c9 100644 --- a/hw/arm/Kconfig +++ b/hw/arm/Kconfig @@ -555,6 +555,7 @@ config ASPEED_SOC select LED select PMBUS select MAX31785 + select FSI_APB2OPB_ASPEED config MPS2 bool diff --git a/hw/fsi/Kconfig b/hw/fsi/Kconfig index 0f6e6d331a..6bbcb8f6ca 100644 --- a/hw/fsi/Kconfig +++ b/hw/fsi/Kconfig @@ -1,3 +1,7 @@ +config FSI_APB2OPB_ASPEED + bool + select FSI_OPB + config FSI_OPB bool select FSI_CFAM diff --git a/hw/fsi/meson.build b/hw/fsi/meson.build index 407b8c2775..1bc6bb63cc 100644 --- a/hw/fsi/meson.build +++ b/hw/fsi/meson.build @@ -3,3 +3,4 @@ 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.c','fsi-master.c','fsi-slave.c')) system_ss.add(when: 'CONFIG_FSI_OPB', if_true: files('opb.c')) +system_ss.add(when: 'CONFIG_FSI_APB2OPB_ASPEED', if_true: files('aspeed-apb2opb.c')) diff --git a/hw/fsi/trace-events b/hw/fsi/trace-events index 89d8cd62c8..3af4755995 100644 --- a/hw/fsi/trace-events +++ b/hw/fsi/trace-events @@ -9,3 +9,5 @@ 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 fsi_master_read(uint64_t addr, uint32_t size) "@0x%" PRIx64 " size=%d" fsi_master_write(uint64_t addr, uint32_t size, uint64_t data) "@0x%" PRIx64 " size=%d value=0x%"PRIx64 +fsi_aspeed_apb2opb_read(uint64_t addr, uint32_t size) "@0x%" PRIx64 " size=%d" +fsi_aspeed_apb2opb_write(uint64_t addr, uint32_t size, uint64_t data) "@0x%" PRIx64 " size=%d value=0x%"PRIx64