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a=openpgp-sha256; l=3129; i=k.jensen@samsung.com; h=from:subject; bh=T5ZXUEf7MEBpxo1GSb5s2xLGSwC+XetAjLEbhTf2BsU=; b=owJ4nAFtAZL+kA0DAAoBTeGvMW1PDekByyZiAGN0oqAU7M5T0BUVO974KIuUsAkvaYO8XxAx5wiT WpczTpYtVYkBMwQAAQoAHRYhBFIoM6p14tzmokdmwE3hrzFtTw3pBQJjdKKgAAoJEE3hrzFtTw3pPd kIAL7FJld6jQ2z7l8iKdg6i1oPJlJVoR90O1vnTBtCk6eNKOm8iJxWxyxe3eOByoiBKIacZ6Uf84sG bl0Qd9cZhWF+vElLGFNWDvvN1LZo3bkn0tHzdLuHC4N7j5G9bnEf/5L406ULtf3phGMPIYbHQ95Ck7 l9C7KWF0M8Mx0AdfQykLDpSp4pMmhDaTQIJvk4VsSZPQU8AJvefehkn8CsX2EZxg+bXRoTzyeNH9/u rq7bialrcq6ZP86gqhKiG9whkoyVeNqTuF1K7IJD4N/wTpYJoqgEw7hU+4fkb4tkrim510a2sWGi3p MNZ4f2n36zzEfNlOBxwjrtHNPrPQu6ypV9wKhV X-Developer-Key: i=k.jensen@samsung.com; a=openpgp; fpr=DDCA4D9C9EF931CC3468427263D56FC5E55DA838 Content-Transfer-Encoding: quoted-printable 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=66.111.4.26; envelope-from=its@irrelevant.dk; helo=out2-smtp.messagingengine.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 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_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_PASS=-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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1668588297589100003 Content-Type: text/plain; charset="utf-8" From: Klaus Jensen It is not given that the current master will release the bus after a transfer ends. Only schedule a pending master if the bus is idle. Fixes: 37fa5ca42623 ("hw/i2c: support multiple masters") Signed-off-by: Klaus Jensen Acked-by: Corey Minyard --- hw/i2c/aspeed_i2c.c | 2 ++ hw/i2c/core.c | 37 ++++++++++++++++++++++--------------- include/hw/i2c/i2c.h | 2 ++ 3 files changed, 26 insertions(+), 15 deletions(-) diff --git a/hw/i2c/aspeed_i2c.c b/hw/i2c/aspeed_i2c.c index c166fd20fa11..1f071a3811f7 100644 --- a/hw/i2c/aspeed_i2c.c +++ b/hw/i2c/aspeed_i2c.c @@ -550,6 +550,8 @@ static void aspeed_i2c_bus_handle_cmd(AspeedI2CBus *bus= , uint64_t value) } SHARED_ARRAY_FIELD_DP32(bus->regs, reg_cmd, M_STOP_CMD, 0); aspeed_i2c_set_state(bus, I2CD_IDLE); + + i2c_schedule_pending_master(bus->bus); } =20 if (aspeed_i2c_bus_pkt_mode_en(bus)) { diff --git a/hw/i2c/core.c b/hw/i2c/core.c index d4ba8146bffb..bed594fe599b 100644 --- a/hw/i2c/core.c +++ b/hw/i2c/core.c @@ -185,22 +185,39 @@ int i2c_start_transfer(I2CBus *bus, uint8_t address, = bool is_recv) =20 void i2c_bus_master(I2CBus *bus, QEMUBH *bh) { + I2CPendingMaster *node =3D g_new(struct I2CPendingMaster, 1); + node->bh =3D bh; + + QSIMPLEQ_INSERT_TAIL(&bus->pending_masters, node, entry); +} + +void i2c_schedule_pending_master(I2CBus *bus) +{ + I2CPendingMaster *node; + if (i2c_bus_busy(bus)) { - I2CPendingMaster *node =3D g_new(struct I2CPendingMaster, 1); - node->bh =3D bh; - - QSIMPLEQ_INSERT_TAIL(&bus->pending_masters, node, entry); + /* someone is already controlling the bus; wait for it to release = it */ + return; + } =20 + if (QSIMPLEQ_EMPTY(&bus->pending_masters)) { return; } =20 - bus->bh =3D bh; + node =3D QSIMPLEQ_FIRST(&bus->pending_masters); + bus->bh =3D node->bh; + + QSIMPLEQ_REMOVE_HEAD(&bus->pending_masters, entry); + g_free(node); + qemu_bh_schedule(bus->bh); } =20 void i2c_bus_release(I2CBus *bus) { bus->bh =3D NULL; + + i2c_schedule_pending_master(bus); } =20 int i2c_start_recv(I2CBus *bus, uint8_t address) @@ -234,16 +251,6 @@ void i2c_end_transfer(I2CBus *bus) g_free(node); } bus->broadcast =3D false; - - if (!QSIMPLEQ_EMPTY(&bus->pending_masters)) { - I2CPendingMaster *node =3D QSIMPLEQ_FIRST(&bus->pending_masters); - bus->bh =3D node->bh; - - QSIMPLEQ_REMOVE_HEAD(&bus->pending_masters, entry); - g_free(node); - - qemu_bh_schedule(bus->bh); - } } =20 int i2c_send(I2CBus *bus, uint8_t data) diff --git a/include/hw/i2c/i2c.h b/include/hw/i2c/i2c.h index 9b9581d23097..2a3abacd1ba6 100644 --- a/include/hw/i2c/i2c.h +++ b/include/hw/i2c/i2c.h @@ -141,6 +141,8 @@ int i2c_start_send(I2CBus *bus, uint8_t address); */ int i2c_start_send_async(I2CBus *bus, uint8_t address); =20 +void i2c_schedule_pending_master(I2CBus *bus); + void i2c_end_transfer(I2CBus *bus); void i2c_nack(I2CBus *bus); void i2c_ack(I2CBus *bus); --=20 2.38.1 From nobody Wed May 15 19:34:55 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1668588246289838.3228768966048; 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envelope-from=its@irrelevant.dk; helo=out2-smtp.messagingengine.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 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_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_PASS=-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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1668588247292100001 Content-Type: text/plain; charset="utf-8" From: Klaus Jensen Add an abstract MCTP over I2C endpoint model. This implements MCTP control message handling as well as handling the actual I2C transport (packetization). Devices are intended to derive from this and implement the class methods. Parts of this implementation is inspired by code[1] previously posted by Jonathan Cameron. [1]: https://lore.kernel.org/qemu-devel/20220520170128.4436-1-Jonathan.Ca= meron@huawei.com/ Signed-off-by: Klaus Jensen --- hw/arm/Kconfig | 1 + hw/i2c/Kconfig | 4 + hw/i2c/mctp.c | 365 +++++++++++++++++++++++++++++++++++++++++ hw/i2c/meson.build | 1 + hw/i2c/trace-events | 12 ++ include/hw/i2c/mctp.h | 83 ++++++++++ include/hw/misc/mctp.h | 43 +++++ 7 files changed, 509 insertions(+) create mode 100644 hw/i2c/mctp.c create mode 100644 include/hw/i2c/mctp.h create mode 100644 include/hw/misc/mctp.h diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig index 17fcde8e1ccc..3233bdc193d7 100644 --- a/hw/arm/Kconfig +++ b/hw/arm/Kconfig @@ -444,6 +444,7 @@ config ASPEED_SOC select DS1338 select FTGMAC100 select I2C + select MCTP_I2C select DPS310 select PCA9552 select SERIAL diff --git a/hw/i2c/Kconfig b/hw/i2c/Kconfig index 9bb8870517f8..5dd43d550c32 100644 --- a/hw/i2c/Kconfig +++ b/hw/i2c/Kconfig @@ -41,3 +41,7 @@ config PCA954X config PMBUS bool select SMBUS + +config MCTP_I2C + bool + select I2C diff --git a/hw/i2c/mctp.c b/hw/i2c/mctp.c new file mode 100644 index 000000000000..46376de95a98 --- /dev/null +++ b/hw/i2c/mctp.c @@ -0,0 +1,365 @@ +/* + * SPDX-License-Identifier: GPL-2.0-or-later + * SPDX-FileCopyrightText: Copyright (c) 2022 Samsung Electronics Co., Ltd. + * SPDX-FileContributor: Klaus Jensen + */ + +#include "qemu/osdep.h" +#include "qemu/main-loop.h" + +#include "hw/qdev-properties.h" +#include "hw/i2c/i2c.h" +#include "hw/i2c/mctp.h" + +#include "trace.h" + +static uint8_t crc8(uint16_t data) +{ +#define POLY (0x1070U << 3) + int i; + + for (i =3D 0; i < 8; i++) { + if (data & 0x8000) { + data =3D data ^ POLY; + } + + data =3D data << 1; + } + + return (uint8_t)(data >> 8); +#undef POLY +} + +static uint8_t i2c_smbus_pec(uint8_t crc, uint8_t *buf, size_t len) +{ + int i; + + for (i =3D 0; i < len; i++) { + crc =3D crc8((crc ^ buf[i]) << 8); + } + + return crc; +} + +void i2c_mctp_schedule_send(MCTPI2CEndpoint *mctp) +{ + I2CBus *i2c =3D I2C_BUS(qdev_get_parent_bus(DEVICE(mctp))); + + mctp->tx.state =3D I2C_MCTP_STATE_TX_START_SEND; + + i2c_bus_master(i2c, mctp->tx.bh); +} + +static void i2c_mctp_tx(void *opaque) +{ + DeviceState *dev =3D DEVICE(opaque); + I2CBus *i2c =3D I2C_BUS(qdev_get_parent_bus(dev)); + I2CSlave *slave =3D I2C_SLAVE(dev); + MCTPI2CEndpoint *mctp =3D MCTP_I2C_ENDPOINT(dev); + MCTPI2CEndpointClass *mc =3D MCTP_I2C_ENDPOINT_GET_CLASS(mctp); + MCTPI2CPacket *pkt =3D (MCTPI2CPacket *)mctp->buffer; + uint8_t flags =3D 0; + + switch (mctp->tx.state) { + case I2C_MCTP_STATE_TX_SEND_BYTE: + if (mctp->pos < mctp->len) { + uint8_t byte =3D mctp->buffer[mctp->pos]; + + trace_i2c_mctp_tx_send_byte(mctp->pos, byte); + + /* send next byte */ + i2c_send_async(i2c, byte); + + mctp->pos++; + + break; + } + + /* packet sent */ + i2c_end_transfer(i2c); + + /* fall through */ + + case I2C_MCTP_STATE_TX_START_SEND: + if (mctp->tx.is_control) { + /* packet payload is already in buffer */ + flags |=3D MCTP_H_FLAGS_SOM | MCTP_H_FLAGS_EOM; + } else { + /* get message bytes from derived device */ + mctp->len =3D mc->get_message_bytes(mctp, pkt->mctp.payload, + I2C_MCTP_MAXMTU, &flags); + } + + if (!mctp->len) { + trace_i2c_mctp_tx_done(); + + /* no more packets needed; release the bus */ + i2c_bus_release(i2c); + + mctp->state =3D I2C_MCTP_STATE_IDLE; + mctp->tx.is_control =3D false; + + break; + } + + mctp->state =3D I2C_MCTP_STATE_TX; + + pkt->i2c =3D (MCTPI2CPacketHeader) { + .dest =3D mctp->tx.addr & ~0x1, + .prot =3D 0xf, + .byte_count =3D 5 + mctp->len, + .source =3D slave->address << 1 | 0x1, + }; + + pkt->mctp.hdr =3D (MCTPPacketHeader) { + .version =3D 0x1, + .eid.dest =3D mctp->tx.eid, + .eid.source =3D mctp->my_eid, + .flags =3D flags | (mctp->tx.pktseq++ & 0x3) << 4 | mctp->tx.f= lags, + }; + + mctp->len +=3D sizeof(MCTPI2CPacket); + mctp->buffer[mctp->len] =3D i2c_smbus_pec(0, mctp->buffer, mctp->l= en); + mctp->len++; + + trace_i2c_mctp_tx_start_send(mctp->len); + + i2c_start_send_async(i2c, pkt->i2c.dest >> 1); + + /* already "sent" the destination slave address */ + mctp->pos =3D 1; + + mctp->tx.state =3D I2C_MCTP_STATE_TX_SEND_BYTE; + + break; + } +} + +#define i2c_mctp_control_data(buf) \ + (i2c_mctp_payload(buf) + offsetof(MCTPControlMessage, data)) + +static void i2c_mctp_handle_control_set_eid(MCTPI2CEndpoint *mctp, uint8_t= eid) +{ + mctp->my_eid =3D eid; + + uint8_t buf[] =3D { + 0x0, 0x0, eid, 0x0, + }; + + memcpy(i2c_mctp_control_data(mctp->buffer), buf, sizeof(buf)); + mctp->len +=3D sizeof(buf); +} + +static void i2c_mctp_handle_control_get_eid(MCTPI2CEndpoint *mctp) +{ + uint8_t buf[] =3D { + 0x0, mctp->my_eid, 0x0, 0x0, + }; + + memcpy(i2c_mctp_control_data(mctp->buffer), buf, sizeof(buf)); + mctp->len +=3D sizeof(buf); +} + +static void i2c_mctp_handle_control_get_version(MCTPI2CEndpoint *mctp) +{ + uint8_t buf[] =3D { + 0x0, 0x1, 0x0, 0x1, 0x3, 0x1, + }; + + memcpy(i2c_mctp_control_data(mctp->buffer), buf, sizeof(buf)); + mctp->len +=3D sizeof(buf); +} + +enum { + MCTP_CONTROL_SET_EID =3D 0x01, + MCTP_CONTROL_GET_EID =3D 0x02, + MCTP_CONTROL_GET_VERSION =3D 0x04, + MCTP_CONTROL_GET_MESSAGE_TYPE_SUPPORT =3D 0x05, +}; + +static void i2c_mctp_handle_control(MCTPI2CEndpoint *mctp) +{ + MCTPI2CEndpointClass *mc =3D MCTP_I2C_ENDPOINT_GET_CLASS(mctp); + MCTPControlMessage *msg =3D (MCTPControlMessage *)i2c_mctp_payload(mct= p->buffer); + + /* clear Rq/D */ + msg->flags &=3D 0x1f; + + mctp->len =3D offsetof(MCTPControlMessage, data); + + trace_i2c_mctp_handle_control(msg->command); + + switch (msg->command) { + case MCTP_CONTROL_SET_EID: + i2c_mctp_handle_control_set_eid(mctp, msg->data[1]); + break; + + case MCTP_CONTROL_GET_EID: + i2c_mctp_handle_control_get_eid(mctp); + break; + + case MCTP_CONTROL_GET_VERSION: + i2c_mctp_handle_control_get_version(mctp); + break; + + case MCTP_CONTROL_GET_MESSAGE_TYPE_SUPPORT: + mctp->len +=3D mc->get_message_types(mctp, i2c_mctp_control_data(m= ctp->buffer)); + break; + + default: + trace_i2c_mctp_unhandled_control(msg->command); + + msg->data[0] =3D MCTP_CONTROL_ERROR_UNSUPPORTED_CMD; + mctp->len++; + + break; + } + + i2c_mctp_schedule_send(mctp); +} + +static int i2c_mctp_event_cb(I2CSlave *i2c, enum i2c_event event) +{ + MCTPI2CEndpoint *mctp =3D MCTP_I2C_ENDPOINT(i2c); + MCTPI2CEndpointClass *mc =3D MCTP_I2C_ENDPOINT_GET_CLASS(mctp); + MCTPI2CPacket *pkt =3D (MCTPI2CPacket *)mctp->buffer; + size_t payload_len; + uint8_t pec; + + switch (event) { + case I2C_START_SEND: + if (mctp->state !=3D I2C_MCTP_STATE_IDLE) { + return -1; + } + + /* the i2c core eats the slave address, so put it back in */ + pkt->i2c.dest =3D i2c->address << 1; + mctp->len =3D 1; + + mctp->state =3D I2C_MCTP_STATE_RX_STARTED; + + return 0; + + case I2C_FINISH: + payload_len =3D mctp->len - (1 + offsetof(MCTPI2CPacket, mctp.payl= oad)); + + if (pkt->i2c.byte_count + 3 !=3D mctp->len - 1) { + trace_i2c_mctp_drop_invalid_length(pkt->i2c.byte_count + 3, + mctp->len - 1); + goto drop; + } + + pec =3D i2c_smbus_pec(0, mctp->buffer, mctp->len - 1); + if (mctp->buffer[mctp->len - 1] !=3D pec) { + trace_i2c_mctp_drop_invalid_pec(mctp->buffer[mctp->len - 1], p= ec); + goto drop; + } + + if (pkt->mctp.hdr.eid.dest !=3D mctp->my_eid) { + trace_i2c_mctp_drop_invalid_eid(pkt->mctp.hdr.eid.dest, + mctp->my_eid); + goto drop; + } + + if (pkt->mctp.hdr.flags & MCTP_H_FLAGS_SOM) { + mctp->tx.is_control =3D false; + + if (mctp->state =3D=3D I2C_MCTP_STATE_RX) { + mc->reset_message(mctp); + } + + mctp->state =3D I2C_MCTP_STATE_RX; + + mctp->tx.addr =3D pkt->i2c.source; + mctp->tx.eid =3D pkt->mctp.hdr.eid.source; + mctp->tx.flags =3D pkt->mctp.hdr.flags & 0x7; + mctp->tx.pktseq =3D (pkt->mctp.hdr.flags >> 4) & 0x3; + + if ((pkt->mctp.payload[0] & 0x7f) =3D=3D MCTP_MESSAGE_TYPE_CON= TROL) { + mctp->tx.is_control =3D true; + + i2c_mctp_handle_control(mctp); + + return 0; + } + } else if (mctp->state =3D=3D I2C_MCTP_STATE_RX_STARTED) { + trace_i2c_mctp_drop("expected SOM"); + goto drop; + } else if (((pkt->mctp.hdr.flags >> 4) & 0x3) !=3D (mctp->tx.pktse= q++ & 0x3)) { + trace_i2c_mctp_drop_invalid_pktseq((pkt->mctp.hdr.flags >> 4) = & 0x3, + mctp->tx.pktseq & 0x3); + goto drop; + } + + mc->put_message_bytes(mctp, i2c_mctp_payload(mctp->buffer), payloa= d_len); + + if (pkt->mctp.hdr.flags & MCTP_H_FLAGS_EOM) { + mc->handle_message(mctp); + mctp->state =3D I2C_MCTP_STATE_WAIT_TX; + } + + return 0; + + default: + return -1; + } + +drop: + mc->reset_message(mctp); + + mctp->state =3D I2C_MCTP_STATE_IDLE; + + return 0; +} + +static int i2c_mctp_send_cb(I2CSlave *i2c, uint8_t data) +{ + MCTPI2CEndpoint *mctp =3D MCTP_I2C_ENDPOINT(i2c); + + if (mctp->len < I2C_MCTP_MAX_LENGTH) { + mctp->buffer[mctp->len++] =3D data; + return 0; + } + + return -1; +} + +static void i2c_mctp_instance_init(Object *obj) +{ + MCTPI2CEndpoint *mctp =3D MCTP_I2C_ENDPOINT(obj); + + mctp->tx.bh =3D qemu_bh_new(i2c_mctp_tx, mctp); +} + +static Property mctp_i2c_props[] =3D { + DEFINE_PROP_UINT8("eid", MCTPI2CEndpoint, my_eid, 0x9), + DEFINE_PROP_END_OF_LIST(), +}; + +static void i2c_mctp_class_init(ObjectClass *oc, void *data) +{ + DeviceClass *dc =3D DEVICE_CLASS(oc); + I2CSlaveClass *k =3D I2C_SLAVE_CLASS(oc); + + k->event =3D i2c_mctp_event_cb; + k->send =3D i2c_mctp_send_cb; + + device_class_set_props(dc, mctp_i2c_props); +} + +static const TypeInfo i2c_mctp_info =3D { + .name =3D TYPE_MCTP_I2C_ENDPOINT, + .parent =3D TYPE_I2C_SLAVE, + .abstract =3D true, + .instance_init =3D i2c_mctp_instance_init, + .instance_size =3D sizeof(MCTPI2CEndpoint), + .class_init =3D i2c_mctp_class_init, + .class_size =3D sizeof(MCTPI2CEndpointClass), +}; + +static void register_types(void) +{ + type_register_static(&i2c_mctp_info); +} + +type_init(register_types) diff --git a/hw/i2c/meson.build b/hw/i2c/meson.build index d3df273251f7..97d0bfd9ac67 100644 --- a/hw/i2c/meson.build +++ b/hw/i2c/meson.build @@ -1,5 +1,6 @@ i2c_ss =3D ss.source_set() i2c_ss.add(when: 'CONFIG_I2C', if_true: files('core.c')) +i2c_ss.add(when: 'CONFIG_MCTP_I2C', if_true: files('mctp.c')) i2c_ss.add(when: 'CONFIG_SMBUS', if_true: files('smbus_slave.c', 'smbus_ma= ster.c')) i2c_ss.add(when: 'CONFIG_ACPI_SMBUS', if_true: files('pm_smbus.c')) i2c_ss.add(when: 'CONFIG_ACPI_X86_ICH', if_true: files('smbus_ich9.c')) diff --git a/hw/i2c/trace-events b/hw/i2c/trace-events index af181d43ee64..778139d08166 100644 --- a/hw/i2c/trace-events +++ b/hw/i2c/trace-events @@ -33,3 +33,15 @@ npcm7xx_smbus_recv_fifo(const char *id, uint8_t received= , uint8_t expected) "%s =20 pca954x_write_bytes(uint8_t value) "PCA954X write data: 0x%02x" pca954x_read_data(uint8_t value) "PCA954X read data: 0x%02x" + +# mctp.c +i2c_mctp_tx_start_send(size_t len) "len %zu" +i2c_mctp_tx_send_byte(size_t pos, uint8_t byte) "pos %zu byte 0x%"PRIx8"" +i2c_mctp_tx_done(void) "packet sent" +i2c_mctp_handle_control(uint8_t command) "command 0x%"PRIx8"" +i2c_mctp_unhandled_control(uint8_t command) "command 0x%"PRIx8"" +i2c_mctp_drop(const char *reason) "%s" +i2c_mctp_drop_invalid_length(unsigned byte_count, size_t expected) "byte_c= ount %u expected %zu" +i2c_mctp_drop_invalid_pec(uint8_t pec, uint8_t expected) "pec 0x%"PRIx8" e= xpected 0x%"PRIx8"" +i2c_mctp_drop_invalid_eid(uint8_t eid, uint8_t expected) "eid 0x%"PRIx8" e= xpected 0x%"PRIx8"" +i2c_mctp_drop_invalid_pktseq(uint8_t pktseq, uint8_t expected) "pktseq 0x%= "PRIx8" expected 0x%"PRIx8"" diff --git a/include/hw/i2c/mctp.h b/include/hw/i2c/mctp.h new file mode 100644 index 000000000000..17dae662138b --- /dev/null +++ b/include/hw/i2c/mctp.h @@ -0,0 +1,83 @@ +#ifndef QEMU_I2C_MCTP_H +#define QEMU_I2C_MCTP_H + +#include "qom/object.h" +#include "hw/qdev-core.h" +#include "hw/misc/mctp.h" + +typedef struct MCTPI2CPacketHeader { + uint8_t dest; + uint8_t prot; + uint8_t byte_count; + uint8_t source; +} MCTPI2CPacketHeader; + +typedef struct MCTPI2CPacket { + MCTPI2CPacketHeader i2c; + MCTPPacket mctp; +} MCTPI2CPacket; + +#define i2c_mctp_payload(buf) (buf + offsetof(MCTPI2CPacket, mctp.payload)) + +#define TYPE_MCTP_I2C_ENDPOINT "mctp-i2c-endpoint" +OBJECT_DECLARE_TYPE(MCTPI2CEndpoint, MCTPI2CEndpointClass, MCTP_I2C_ENDPOI= NT) + +struct MCTPI2CEndpointClass { + I2CSlaveClass parent_class; + + int (*put_message_bytes)(MCTPI2CEndpoint *mctp, uint8_t *buf, size_t l= en); + size_t (*get_message_bytes)(MCTPI2CEndpoint *mctp, uint8_t *buf, + size_t maxlen, uint8_t *mctp_flags); + + void (*handle_message)(MCTPI2CEndpoint *mctp); + void (*reset_message)(MCTPI2CEndpoint *mctp); + + size_t (*get_message_types)(MCTPI2CEndpoint *mctp, uint8_t *data); +}; + +#define I2C_MCTP_MAXBLOCK 255 +#define I2C_MCTP_MAXMTU (I2C_MCTP_MAXBLOCK - (sizeof(MCTPPacketHeader) + 1= )) +#define I2C_MCTP_MAX_LENGTH (3 + I2C_MCTP_MAXBLOCK + 1) + +typedef enum { + I2C_MCTP_STATE_IDLE, + I2C_MCTP_STATE_RX_STARTED, + I2C_MCTP_STATE_RX, + I2C_MCTP_STATE_WAIT_TX, + I2C_MCTP_STATE_TX, +} MCTPState; + +typedef enum { + I2C_MCTP_STATE_TX_START_SEND, + I2C_MCTP_STATE_TX_SEND_BYTE, +} MCTPTxState; + +typedef struct MCTPI2CEndpoint { + I2CSlave parent_obj; + I2CBus *i2c; + + MCTPState state; + + /* mctp endpoint identifier */ + uint8_t my_eid; + + uint8_t buffer[I2C_MCTP_MAX_LENGTH]; + uint64_t pos; + size_t len; + + struct { + MCTPTxState state; + bool is_control; + + uint8_t eid; + uint8_t addr; + uint8_t pktseq; + uint8_t flags; + + QEMUBH *bh; + } tx; +} MCTPI2CEndpoint; + +void i2c_mctp_schedule_send(MCTPI2CEndpoint *mctp); + +#endif /* QEMU_I2C_MCTP_H */ diff --git a/include/hw/misc/mctp.h b/include/hw/misc/mctp.h new file mode 100644 index 000000000000..c936224ecf60 --- /dev/null +++ b/include/hw/misc/mctp.h @@ -0,0 +1,43 @@ +#ifndef QEMU_MCTP_H +#define QEMU_MCTP_H + +#define MCTP_BASELINE_MTU 64 + +enum { + MCTP_H_FLAGS_EOM =3D 1 << 6, + MCTP_H_FLAGS_SOM =3D 1 << 7, +}; + +enum { + MCTP_MESSAGE_TYPE_CONTROL =3D 0x0, + MCTP_MESSAGE_TYPE_NMI =3D 0x4, + + MCTP_MESSAGE_IC =3D 1 << 7, +}; + +typedef struct MCTPPacketHeader { + uint8_t version; + struct { + uint8_t dest; + uint8_t source; + } eid; + uint8_t flags; +} MCTPPacketHeader; + +typedef struct MCTPPacket { + MCTPPacketHeader hdr; + uint8_t payload[]; +} MCTPPacket; + +typedef struct MCTPControlMessage { + uint8_t type; + uint8_t flags; + uint8_t command; + uint8_t data[]; +} MCTPControlMessage; + +enum { + MCTP_CONTROL_ERROR_UNSUPPORTED_CMD =3D 0x5, +}; + +#endif /* QEMU_MCTP_H */ --=20 2.38.1 From nobody Wed May 15 19:34:55 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1668588245273967.3812590099305; Wed, 16 Nov 2022 00:44:05 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ovE18-0005I6-5c; 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envelope-from=its@irrelevant.dk; helo=out2-smtp.messagingengine.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 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_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_PASS=-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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1668588247356100002 Content-Type: text/plain; charset="utf-8" From: Klaus Jensen Add the 'nmi-i2c' device that emulates an NVMe Management Interface controller. Initial support is very basic (Read NMI DS, Configuration Get). This is based on previously posted code by Padmakar Kalghatgi, Arun Kumar Agasar and Saurav Kumar. Signed-off-by: Klaus Jensen --- hw/nvme/meson.build | 1 + hw/nvme/nmi-i2c.c | 381 +++++++++++++++++++++++++++++++++++++++++++ hw/nvme/trace-events | 6 + 3 files changed, 388 insertions(+) create mode 100644 hw/nvme/nmi-i2c.c diff --git a/hw/nvme/meson.build b/hw/nvme/meson.build index 3cf40046eea9..b231e3fa12c2 100644 --- a/hw/nvme/meson.build +++ b/hw/nvme/meson.build @@ -1 +1,2 @@ softmmu_ss.add(when: 'CONFIG_NVME_PCI', if_true: files('ctrl.c', 'dif.c', = 'ns.c', 'subsys.c')) +softmmu_ss.add(when: 'CONFIG_MCTP_I2C', if_true: files('nmi-i2c.c')) diff --git a/hw/nvme/nmi-i2c.c b/hw/nvme/nmi-i2c.c new file mode 100644 index 000000000000..79fd18cdc5cf --- /dev/null +++ b/hw/nvme/nmi-i2c.c @@ -0,0 +1,381 @@ +/* + * SPDX-License-Identifier: GPL-2.0-only + * + * SPDX-FileCopyrightText: Copyright (c) 2022 Samsung Electronics Co., Ltd. + * + * SPDX-FileContributor: Padmakar Kalghatgi + * SPDX-FileContributor: Arun Kumar Agasar + * SPDX-FileContributor: Saurav Kumar + * SPDX-FileContributor: Klaus Jensen + */ + +#include "qemu/osdep.h" +#include "qemu/crc32c.h" +#include "hw/i2c/i2c.h" +#include "hw/registerfields.h" +#include "hw/i2c/mctp.h" +#include "trace.h" + +#define NMI_MAX_MESSAGE_LENGTH 4224 + +#define TYPE_NMI_I2C_DEVICE "nmi-i2c" +OBJECT_DECLARE_SIMPLE_TYPE(NMIDevice, NMI_I2C_DEVICE) + +typedef struct NMIDevice { + MCTPI2CEndpoint mctp; + + uint8_t buffer[NMI_MAX_MESSAGE_LENGTH]; + uint8_t scratch[NMI_MAX_MESSAGE_LENGTH]; + + size_t len; + int64_t pos; +} NMIDevice; + +FIELD(NMI_NMP, ROR, 7, 1) +FIELD(NMI_NMP, NMIMT, 3, 4) + +#define NMI_NMP_NMIMT_NMI_CMD 0x1 +#define NMI_NMP_NMIMT_NM_ADMIN 0x2 + +typedef struct NMIMessage { + uint8_t mctpd; + uint8_t nmp; + uint8_t rsvd2[2]; + uint8_t payload[]; /* includes the Message Integrity Check */ +} NMIMessage; + +typedef struct NMIRequest { + uint8_t opc; + uint8_t rsvd1[3]; + uint32_t dw0; + uint32_t dw1; + uint32_t mic; +} NMIRequest; + +typedef struct NMIResponse { + uint8_t status; + uint8_t response[3]; + uint8_t payload[]; /* includes the Message Integrity Check */ +} NMIResponse; + +typedef enum NMIReadDSType { + NMI_CMD_READ_NMI_DS_SUBSYSTEM =3D 0x0, + NMI_CMD_READ_NMI_DS_PORTS =3D 0x1, + NMI_CMD_READ_NMI_DS_CTRL_LIST =3D 0x2, + NMI_CMD_READ_NMI_DS_CTRL_INFO =3D 0x3, + NMI_CMD_READ_NMI_DS_CMD_SUPPORT =3D 0x4, + NMI_CMD_READ_NMI_DS_MEB_CMD_SUPPORT =3D 0x5, +} NMIReadDSType; + +static void nmi_handle_mi_read_nmi_ds(NMIDevice *nmi, NMIRequest *request) +{ + I2CSlave *i2c =3D I2C_SLAVE(nmi); + + uint32_t dw0 =3D le32_to_cpu(request->dw0); + uint8_t dtyp =3D (dw0 >> 24) & 0xf; + uint8_t *buf; + size_t len; + + trace_nmi_handle_mi_read_nmi_ds(dtyp); + + static uint8_t nmi_ds_subsystem[36] =3D { + 0x00, /* success */ + 0x20, /* response data length */ + 0x00, 0x00, /* reserved */ + 0x00, /* number of ports */ + 0x01, /* major version */ + 0x01, /* minor version */ + }; + + static uint8_t nmi_ds_ports[36] =3D { + 0x00, /* success */ + 0x20, /* response data length */ + 0x00, 0x00, /* reserved */ + 0x02, /* port type (smbus) */ + 0x00, /* reserved */ + 0x40, 0x00, /* maximum mctp transission unit size (64 bytes) */ + 0x00, 0x00, 0x00, 0x00, /* management endpoint buffer size */ + 0x00, 0x00, /* vpd i2c address/freq */ + 0x00, 0x01, /* management endpoint i2c address/freq */ + }; + + static uint8_t nmi_ds_error[4] =3D { + 0x04, /* invalid parameter */ + 0x00, /* first invalid bit position */ + 0x00, 0x00, /* first invalid byte position */ + }; + + static uint8_t nmi_ds_empty[8] =3D { + 0x00, /* success */ + 0x02, /* response data length */ + 0x00, 0x00, /* reserved */ + 0x00, 0x00, /* number of controllers */ + 0x00, 0x00, /* padding */ + }; + + switch (dtyp) { + case NMI_CMD_READ_NMI_DS_SUBSYSTEM: + len =3D 36; + buf =3D nmi_ds_subsystem; + + break; + + case NMI_CMD_READ_NMI_DS_PORTS: + len =3D 36; + buf =3D nmi_ds_ports; + + /* patch in the i2c address of the endpoint */ + buf[14] =3D i2c->address; + + break; + + case NMI_CMD_READ_NMI_DS_CTRL_INFO: + len =3D 4; + buf =3D nmi_ds_error; + + break; + + case NMI_CMD_READ_NMI_DS_CTRL_LIST: + case NMI_CMD_READ_NMI_DS_CMD_SUPPORT: + case NMI_CMD_READ_NMI_DS_MEB_CMD_SUPPORT: + len =3D 8; + buf =3D nmi_ds_empty; + + break; + + default: + len =3D 4; + buf =3D nmi_ds_error; + + /* patch in the invalid parameter position */ + buf[2] =3D 0x03; /* first invalid byte position (dtyp) */ + + break; + } + + memcpy(nmi->scratch + nmi->pos, buf, len); + nmi->pos +=3D len; +} + +enum { + NMI_CMD_CONFIGURATION_GET_SMBUS_FREQ =3D 0x1, + NMI_CMD_CONFIGURATION_GET_HEALTH_STATUS_CHANGE =3D 0x2, + NMI_CMD_CONFIGURATION_GET_MCTP_TRANSMISSION_UNIT =3D 0x3, +}; + +static void nmi_handle_mi_config_get(NMIDevice *nmi, NMIRequest *request) +{ + uint32_t dw0 =3D le32_to_cpu(request->dw0); + uint8_t identifier =3D dw0 & 0xff; + uint8_t *buf; + + trace_nmi_handle_mi_config_get(identifier); + + switch (identifier) { + case NMI_CMD_CONFIGURATION_GET_SMBUS_FREQ: + buf =3D (uint8_t[]) { + 0x0, 0x1, 0x0, 0x0, + }; + + break; + + case NMI_CMD_CONFIGURATION_GET_HEALTH_STATUS_CHANGE: + buf =3D (uint8_t[]) { + 0x0, 0x0, 0x0, 0x0, + }; + + break; + + case NMI_CMD_CONFIGURATION_GET_MCTP_TRANSMISSION_UNIT: + buf =3D (uint8_t[]) { + 0x0, 0x40, 0x0, 0x0, + }; + + break; + } + + memcpy(nmi->scratch + nmi->pos, buf, 4); + nmi->pos +=3D 4; +} + +enum { + NMI_CMD_READ_NMI_DS =3D 0x0, + NMI_CMD_CONFIGURATION_GET =3D 0x4, +}; + +static void nmi_set_parameter_error(NMIDevice *nmi, uint8_t bit, uint16_t = byte) +{ + nmi->scratch[nmi->pos++] =3D 0x4; + nmi->scratch[nmi->pos++] =3D bit; + nmi->scratch[nmi->pos++] =3D (byte >> 4) & 0xf; + nmi->scratch[nmi->pos++] =3D byte & 0xf; +} + +static void nmi_set_error(NMIDevice *nmi, uint8_t status) +{ + uint8_t buf[4] =3D {}; + + buf[0] =3D status; + + memcpy(nmi->scratch + nmi->pos, buf, 4); + nmi->pos +=3D 4; +} + +static void nmi_handle_mi(NMIDevice *nmi, NMIMessage *msg) +{ + NMIRequest *request =3D (NMIRequest *)msg->payload; + + trace_nmi_handle_mi(request->opc); + + switch (request->opc) { + case NMI_CMD_READ_NMI_DS: + nmi_handle_mi_read_nmi_ds(nmi, request); + break; + + case NMI_CMD_CONFIGURATION_GET: + nmi_handle_mi_config_get(nmi, request); + break; + + default: + nmi_set_parameter_error(nmi, 0x0, 0x0); + fprintf(stderr, "nmi command 0x%x not handled\n", request->opc); + + break; + } +} + +enum { + NMI_MESSAGE_TYPE_NMI =3D 0x1, +}; + +static void nmi_handle_message(MCTPI2CEndpoint *mctp) +{ + NMIDevice *nmi =3D NMI_I2C_DEVICE(mctp); + NMIMessage *msg =3D (NMIMessage *)nmi->buffer; + uint32_t crc; + uint8_t nmimt; + + uint8_t buf[] =3D { + MCTP_MESSAGE_TYPE_NMI | MCTP_MESSAGE_IC, + FIELD_DP8(msg->nmp, NMI_NMP, ROR, 1), + 0x0, 0x0, + }; + + memcpy(nmi->scratch, buf, sizeof(buf)); + nmi->pos =3D sizeof(buf); + + nmimt =3D FIELD_EX8(msg->nmp, NMI_NMP, NMIMT); + + trace_nmi_handle_msg(nmimt); + + switch (nmimt) { + case NMI_MESSAGE_TYPE_NMI: + nmi_handle_mi(nmi, msg); + break; + + default: + fprintf(stderr, "nmi message type 0x%x not handled\n", nmimt); + + nmi_set_error(nmi, 0x3); + + break; + } + + /* add message integrity check */ + memset(nmi->scratch + nmi->pos, 0x0, sizeof(crc)); + + crc =3D crc32c(0xffffffff, nmi->scratch, nmi->pos); + memcpy(nmi->scratch + nmi->pos, &crc, sizeof(crc)); + + nmi->len =3D nmi->pos + sizeof(crc); + nmi->pos =3D 0; + + i2c_mctp_schedule_send(mctp); +} + +static size_t nmi_get_message_bytes(MCTPI2CEndpoint *mctp, uint8_t *buf, + size_t maxlen, uint8_t *mctp_flags) +{ + NMIDevice *nmi =3D NMI_I2C_DEVICE(mctp); + size_t len; + + len =3D MIN(maxlen, nmi->len - nmi->pos); + + if (len =3D=3D 0) { + return 0; + } + + if (nmi->pos =3D=3D 0) { + *mctp_flags |=3D MCTP_H_FLAGS_SOM; + } + + memcpy(buf, nmi->scratch + nmi->pos, len); + nmi->pos +=3D len; + + if (nmi->pos =3D=3D nmi->len) { + *mctp_flags |=3D MCTP_H_FLAGS_EOM; + + nmi->pos =3D nmi->len =3D 0; + } + + return len; +} + +static int nmi_put_message_bytes(MCTPI2CEndpoint *mctp, uint8_t *buf, + size_t len) +{ + NMIDevice *nmi =3D NMI_I2C_DEVICE(mctp); + + if (nmi->len + len > NMI_MAX_MESSAGE_LENGTH) { + return -1; + } + + memcpy(nmi->buffer + nmi->len, buf, len); + nmi->len +=3D len; + + return 0; +} + +static void nmi_reset_message(MCTPI2CEndpoint *mctp) +{ + NMIDevice *nmi =3D NMI_I2C_DEVICE(mctp); + nmi->len =3D 0; +} + +static size_t nmi_get_message_types(MCTPI2CEndpoint *mctp, uint8_t *data) +{ + uint8_t buf[] =3D { + 0x0, 0x1, 0x4, + }; + + memcpy(data, buf, sizeof(buf)); + + return sizeof(buf); +} + +static void nvme_mi_class_init(ObjectClass *oc, void *data) +{ + MCTPI2CEndpointClass *mc =3D MCTP_I2C_ENDPOINT_CLASS(oc); + + mc->get_message_types =3D nmi_get_message_types; + + mc->get_message_bytes =3D nmi_get_message_bytes; + mc->put_message_bytes =3D nmi_put_message_bytes; + + mc->handle_message =3D nmi_handle_message; + mc->reset_message =3D nmi_reset_message; +} + +static const TypeInfo nvme_mi =3D { + .name =3D TYPE_NMI_I2C_DEVICE, + .parent =3D TYPE_MCTP_I2C_ENDPOINT, + .instance_size =3D sizeof(NMIDevice), + .class_init =3D nvme_mi_class_init, +}; + +static void register_types(void) +{ + type_register_static(&nvme_mi); +} + +type_init(register_types); diff --git a/hw/nvme/trace-events b/hw/nvme/trace-events index fccb79f48973..669785780b2a 100644 --- a/hw/nvme/trace-events +++ b/hw/nvme/trace-events @@ -214,3 +214,9 @@ pci_nvme_ub_db_wr_invalid_sq(uint32_t qid) "submission = queue doorbell write for pci_nvme_ub_db_wr_invalid_sqtail(uint32_t qid, uint16_t new_tail) "submiss= ion queue doorbell write value beyond queue size, sqid=3D%"PRIu32", new_hea= d=3D%"PRIu16", ignoring" pci_nvme_ub_unknown_css_value(void) "unknown value in cc.css field" pci_nvme_ub_too_many_mappings(void) "too many prp/sgl mappings" + +# nmi-i2c +nmi_handle_mi_read_nmi_ds(uint8_t dtyp) "dtyp 0x%"PRIx8"" +nmi_handle_mi_config_get(uint8_t identifier) "identifier 0x%"PRIx8"" +nmi_handle_mi(uint8_t opc) "opc 0x%"PRIx8"" +nmi_handle_msg(uint8_t nmint) "nmint 0x%"PRIx8"" --=20 2.38.1