Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Corey Minyard <cminyard@mvista.com> Tested-by: Corey Minyard <cminyard@mvista.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
525 lines
16 KiB
C
525 lines
16 KiB
C
/*
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* QEMU ISA IPMI BT emulation
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*
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* Copyright (c) 2015 Corey Minyard, MontaVista Software, LLC
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "hw/hw.h"
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#include "hw/ipmi/ipmi.h"
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#include "hw/isa/isa.h"
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/* Control register */
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#define IPMI_BT_CLR_WR_BIT 0
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#define IPMI_BT_CLR_RD_BIT 1
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#define IPMI_BT_H2B_ATN_BIT 2
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#define IPMI_BT_B2H_ATN_BIT 3
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#define IPMI_BT_SMS_ATN_BIT 4
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#define IPMI_BT_HBUSY_BIT 6
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#define IPMI_BT_BBUSY_BIT 7
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#define IPMI_BT_GET_CLR_WR(d) (((d) >> IPMI_BT_CLR_WR_BIT) & 0x1)
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#define IPMI_BT_GET_CLR_RD(d) (((d) >> IPMI_BT_CLR_RD_BIT) & 0x1)
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#define IPMI_BT_GET_H2B_ATN(d) (((d) >> IPMI_BT_H2B_ATN_BIT) & 0x1)
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#define IPMI_BT_B2H_ATN_MASK (1 << IPMI_BT_B2H_ATN_BIT)
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#define IPMI_BT_GET_B2H_ATN(d) (((d) >> IPMI_BT_B2H_ATN_BIT) & 0x1)
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#define IPMI_BT_SET_B2H_ATN(d, v) ((d) = (((d) & ~IPMI_BT_B2H_ATN_MASK) | \
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(((v) & 1) << IPMI_BT_B2H_ATN_BIT)))
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#define IPMI_BT_SMS_ATN_MASK (1 << IPMI_BT_SMS_ATN_BIT)
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#define IPMI_BT_GET_SMS_ATN(d) (((d) >> IPMI_BT_SMS_ATN_BIT) & 0x1)
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#define IPMI_BT_SET_SMS_ATN(d, v) ((d) = (((d) & ~IPMI_BT_SMS_ATN_MASK) | \
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(((v) & 1) << IPMI_BT_SMS_ATN_BIT)))
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#define IPMI_BT_HBUSY_MASK (1 << IPMI_BT_HBUSY_BIT)
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#define IPMI_BT_GET_HBUSY(d) (((d) >> IPMI_BT_HBUSY_BIT) & 0x1)
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#define IPMI_BT_SET_HBUSY(d, v) ((d) = (((d) & ~IPMI_BT_HBUSY_MASK) | \
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(((v) & 1) << IPMI_BT_HBUSY_BIT)))
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#define IPMI_BT_BBUSY_MASK (1 << IPMI_BT_BBUSY_BIT)
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#define IPMI_BT_SET_BBUSY(d, v) ((d) = (((d) & ~IPMI_BT_BBUSY_MASK) | \
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(((v) & 1) << IPMI_BT_BBUSY_BIT)))
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/* Mask register */
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#define IPMI_BT_B2H_IRQ_EN_BIT 0
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#define IPMI_BT_B2H_IRQ_BIT 1
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#define IPMI_BT_B2H_IRQ_EN_MASK (1 << IPMI_BT_B2H_IRQ_EN_BIT)
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#define IPMI_BT_GET_B2H_IRQ_EN(d) (((d) >> IPMI_BT_B2H_IRQ_EN_BIT) & 0x1)
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#define IPMI_BT_SET_B2H_IRQ_EN(d, v) ((d) = (((d) & ~IPMI_BT_B2H_IRQ_EN_MASK) |\
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(((v) & 1) << IPMI_BT_B2H_IRQ_EN_BIT)))
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#define IPMI_BT_B2H_IRQ_MASK (1 << IPMI_BT_B2H_IRQ_BIT)
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#define IPMI_BT_GET_B2H_IRQ(d) (((d) >> IPMI_BT_B2H_IRQ_BIT) & 0x1)
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#define IPMI_BT_SET_B2H_IRQ(d, v) ((d) = (((d) & ~IPMI_BT_B2H_IRQ_MASK) | \
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(((v) & 1) << IPMI_BT_B2H_IRQ_BIT)))
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typedef struct IPMIBT {
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IPMIBmc *bmc;
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bool do_wake;
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qemu_irq irq;
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uint32_t io_base;
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unsigned long io_length;
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MemoryRegion io;
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bool obf_irq_set;
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bool atn_irq_set;
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bool use_irq;
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bool irqs_enabled;
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uint8_t outmsg[MAX_IPMI_MSG_SIZE];
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uint32_t outpos;
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uint32_t outlen;
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uint8_t inmsg[MAX_IPMI_MSG_SIZE];
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uint32_t inlen;
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uint8_t control_reg;
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uint8_t mask_reg;
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/*
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* This is a response number that we send with the command to make
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* sure that the response matches the command.
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*/
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uint8_t waiting_rsp;
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uint8_t waiting_seq;
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} IPMIBT;
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#define IPMI_CMD_GET_BT_INTF_CAP 0x36
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static void ipmi_bt_handle_event(IPMIInterface *ii)
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{
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IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
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IPMIBT *ib = iic->get_backend_data(ii);
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if (ib->inlen < 4) {
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goto out;
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}
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/* Note that overruns are handled by handle_command */
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if (ib->inmsg[0] != (ib->inlen - 1)) {
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/* Length mismatch, just ignore. */
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IPMI_BT_SET_BBUSY(ib->control_reg, 1);
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ib->inlen = 0;
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goto out;
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}
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if ((ib->inmsg[1] == (IPMI_NETFN_APP << 2)) &&
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(ib->inmsg[3] == IPMI_CMD_GET_BT_INTF_CAP)) {
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/* We handle this one ourselves. */
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ib->outmsg[0] = 9;
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ib->outmsg[1] = ib->inmsg[1] | 0x04;
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ib->outmsg[2] = ib->inmsg[2];
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ib->outmsg[3] = ib->inmsg[3];
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ib->outmsg[4] = 0;
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ib->outmsg[5] = 1; /* Only support 1 outstanding request. */
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if (sizeof(ib->inmsg) > 0xff) { /* Input buffer size */
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ib->outmsg[6] = 0xff;
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} else {
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ib->outmsg[6] = (unsigned char) sizeof(ib->inmsg);
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}
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if (sizeof(ib->outmsg) > 0xff) { /* Output buffer size */
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ib->outmsg[7] = 0xff;
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} else {
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ib->outmsg[7] = (unsigned char) sizeof(ib->outmsg);
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}
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ib->outmsg[8] = 10; /* Max request to response time */
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ib->outmsg[9] = 0; /* Don't recommend retries */
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ib->outlen = 10;
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IPMI_BT_SET_BBUSY(ib->control_reg, 0);
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IPMI_BT_SET_B2H_ATN(ib->control_reg, 1);
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if (ib->use_irq && ib->irqs_enabled &&
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!IPMI_BT_GET_B2H_IRQ(ib->mask_reg) &&
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IPMI_BT_GET_B2H_IRQ_EN(ib->mask_reg)) {
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IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 1);
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qemu_irq_raise(ib->irq);
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}
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goto out;
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}
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ib->waiting_seq = ib->inmsg[2];
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ib->inmsg[2] = ib->inmsg[1];
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{
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IPMIBmcClass *bk = IPMI_BMC_GET_CLASS(ib->bmc);
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bk->handle_command(ib->bmc, ib->inmsg + 2, ib->inlen - 2,
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sizeof(ib->inmsg), ib->waiting_rsp);
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}
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out:
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return;
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}
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static void ipmi_bt_handle_rsp(IPMIInterface *ii, uint8_t msg_id,
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unsigned char *rsp, unsigned int rsp_len)
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{
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IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
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IPMIBT *ib = iic->get_backend_data(ii);
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if (ib->waiting_rsp == msg_id) {
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ib->waiting_rsp++;
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if (rsp_len > (sizeof(ib->outmsg) - 2)) {
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ib->outmsg[0] = 4;
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ib->outmsg[1] = rsp[0];
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ib->outmsg[2] = ib->waiting_seq;
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ib->outmsg[3] = rsp[1];
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ib->outmsg[4] = IPMI_CC_CANNOT_RETURN_REQ_NUM_BYTES;
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ib->outlen = 5;
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} else {
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ib->outmsg[0] = rsp_len + 1;
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ib->outmsg[1] = rsp[0];
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ib->outmsg[2] = ib->waiting_seq;
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memcpy(ib->outmsg + 3, rsp + 1, rsp_len - 1);
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ib->outlen = rsp_len + 2;
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}
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IPMI_BT_SET_BBUSY(ib->control_reg, 0);
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IPMI_BT_SET_B2H_ATN(ib->control_reg, 1);
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if (ib->use_irq && ib->irqs_enabled &&
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!IPMI_BT_GET_B2H_IRQ(ib->mask_reg) &&
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IPMI_BT_GET_B2H_IRQ_EN(ib->mask_reg)) {
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IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 1);
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qemu_irq_raise(ib->irq);
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}
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}
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}
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static uint64_t ipmi_bt_ioport_read(void *opaque, hwaddr addr, unsigned size)
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{
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IPMIInterface *ii = opaque;
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IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
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IPMIBT *ib = iic->get_backend_data(ii);
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uint32_t ret = 0xff;
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switch (addr & 3) {
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case 0:
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ret = ib->control_reg;
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break;
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case 1:
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if (ib->outpos < ib->outlen) {
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ret = ib->outmsg[ib->outpos];
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ib->outpos++;
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if (ib->outpos == ib->outlen) {
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ib->outpos = 0;
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ib->outlen = 0;
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}
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} else {
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ret = 0xff;
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}
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break;
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case 2:
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ret = ib->mask_reg;
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break;
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}
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return ret;
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}
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static void ipmi_bt_signal(IPMIBT *ib, IPMIInterface *ii)
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{
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IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
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ib->do_wake = 1;
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while (ib->do_wake) {
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ib->do_wake = 0;
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iic->handle_if_event(ii);
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}
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}
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static void ipmi_bt_ioport_write(void *opaque, hwaddr addr, uint64_t val,
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unsigned size)
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{
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IPMIInterface *ii = opaque;
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IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
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IPMIBT *ib = iic->get_backend_data(ii);
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switch (addr & 3) {
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case 0:
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if (IPMI_BT_GET_CLR_WR(val)) {
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ib->inlen = 0;
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}
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if (IPMI_BT_GET_CLR_RD(val)) {
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ib->outpos = 0;
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}
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if (IPMI_BT_GET_B2H_ATN(val)) {
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IPMI_BT_SET_B2H_ATN(ib->control_reg, 0);
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}
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if (IPMI_BT_GET_SMS_ATN(val)) {
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IPMI_BT_SET_SMS_ATN(ib->control_reg, 0);
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}
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if (IPMI_BT_GET_HBUSY(val)) {
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/* Toggle */
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IPMI_BT_SET_HBUSY(ib->control_reg,
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!IPMI_BT_GET_HBUSY(ib->control_reg));
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}
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if (IPMI_BT_GET_H2B_ATN(val)) {
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IPMI_BT_SET_BBUSY(ib->control_reg, 1);
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ipmi_bt_signal(ib, ii);
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}
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break;
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case 1:
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if (ib->inlen < sizeof(ib->inmsg)) {
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ib->inmsg[ib->inlen] = val;
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}
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ib->inlen++;
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break;
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case 2:
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if (IPMI_BT_GET_B2H_IRQ_EN(val) !=
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IPMI_BT_GET_B2H_IRQ_EN(ib->mask_reg)) {
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if (IPMI_BT_GET_B2H_IRQ_EN(val)) {
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if (IPMI_BT_GET_B2H_ATN(ib->control_reg) ||
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IPMI_BT_GET_SMS_ATN(ib->control_reg)) {
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IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 1);
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qemu_irq_raise(ib->irq);
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}
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IPMI_BT_SET_B2H_IRQ_EN(ib->mask_reg, 1);
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} else {
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if (IPMI_BT_GET_B2H_IRQ(ib->mask_reg)) {
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IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 0);
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qemu_irq_lower(ib->irq);
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}
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IPMI_BT_SET_B2H_IRQ_EN(ib->mask_reg, 0);
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}
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}
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if (IPMI_BT_GET_B2H_IRQ(val) && IPMI_BT_GET_B2H_IRQ(ib->mask_reg)) {
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IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 0);
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qemu_irq_lower(ib->irq);
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}
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break;
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}
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}
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static const MemoryRegionOps ipmi_bt_io_ops = {
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.read = ipmi_bt_ioport_read,
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.write = ipmi_bt_ioport_write,
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.impl = {
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.min_access_size = 1,
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.max_access_size = 1,
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},
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.endianness = DEVICE_LITTLE_ENDIAN,
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};
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static void ipmi_bt_set_atn(IPMIInterface *ii, int val, int irq)
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{
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IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
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IPMIBT *ib = iic->get_backend_data(ii);
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if (!!val == IPMI_BT_GET_SMS_ATN(ib->control_reg)) {
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return;
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}
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IPMI_BT_SET_SMS_ATN(ib->control_reg, val);
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if (val) {
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if (irq && ib->use_irq && ib->irqs_enabled &&
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!IPMI_BT_GET_B2H_ATN(ib->control_reg) &&
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IPMI_BT_GET_B2H_IRQ_EN(ib->mask_reg)) {
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IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 1);
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qemu_irq_raise(ib->irq);
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}
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} else {
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if (!IPMI_BT_GET_B2H_ATN(ib->control_reg) &&
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IPMI_BT_GET_B2H_IRQ(ib->mask_reg)) {
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IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 0);
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qemu_irq_lower(ib->irq);
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}
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}
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}
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static void ipmi_bt_handle_reset(IPMIInterface *ii, bool is_cold)
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{
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IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
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IPMIBT *ib = iic->get_backend_data(ii);
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if (is_cold) {
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/* Disable the BT interrupt on reset */
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if (IPMI_BT_GET_B2H_IRQ(ib->mask_reg)) {
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IPMI_BT_SET_B2H_IRQ(ib->mask_reg, 0);
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qemu_irq_lower(ib->irq);
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}
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IPMI_BT_SET_B2H_IRQ_EN(ib->mask_reg, 0);
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}
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}
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static void ipmi_bt_set_irq_enable(IPMIInterface *ii, int val)
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{
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IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
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IPMIBT *ib = iic->get_backend_data(ii);
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ib->irqs_enabled = val;
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}
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static void ipmi_bt_init(IPMIInterface *ii, Error **errp)
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{
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IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
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IPMIBT *ib = iic->get_backend_data(ii);
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ib->io_length = 3;
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memory_region_init_io(&ib->io, NULL, &ipmi_bt_io_ops, ii, "ipmi-bt", 3);
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}
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#define TYPE_ISA_IPMI_BT "isa-ipmi-bt"
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#define ISA_IPMI_BT(obj) OBJECT_CHECK(ISAIPMIBTDevice, (obj), \
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TYPE_ISA_IPMI_BT)
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typedef struct ISAIPMIBTDevice {
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ISADevice dev;
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int32_t isairq;
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IPMIBT bt;
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uint32_t uuid;
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} ISAIPMIBTDevice;
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static void ipmi_bt_get_fwinfo(struct IPMIInterface *ii, IPMIFwInfo *info)
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{
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ISAIPMIBTDevice *iib = ISA_IPMI_BT(ii);
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info->interface_name = "bt";
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info->interface_type = IPMI_SMBIOS_BT;
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info->ipmi_spec_major_revision = 2;
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info->ipmi_spec_minor_revision = 0;
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info->base_address = iib->bt.io_base;
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info->register_length = iib->bt.io_length;
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info->register_spacing = 1;
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info->memspace = IPMI_MEMSPACE_IO;
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info->irq_type = IPMI_LEVEL_IRQ;
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info->interrupt_number = iib->isairq;
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info->i2c_slave_address = iib->bt.bmc->slave_addr;
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info->uuid = iib->uuid;
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}
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static void ipmi_bt_class_init(IPMIInterfaceClass *iic)
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{
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iic->init = ipmi_bt_init;
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iic->set_atn = ipmi_bt_set_atn;
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iic->handle_rsp = ipmi_bt_handle_rsp;
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iic->handle_if_event = ipmi_bt_handle_event;
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iic->set_irq_enable = ipmi_bt_set_irq_enable;
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iic->reset = ipmi_bt_handle_reset;
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iic->get_fwinfo = ipmi_bt_get_fwinfo;
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}
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static void isa_ipmi_bt_realize(DeviceState *dev, Error **errp)
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{
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ISADevice *isadev = ISA_DEVICE(dev);
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ISAIPMIBTDevice *iib = ISA_IPMI_BT(dev);
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IPMIInterface *ii = IPMI_INTERFACE(dev);
|
|
IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
|
|
|
|
if (!iib->bt.bmc) {
|
|
error_setg(errp, "IPMI device requires a bmc attribute to be set");
|
|
return;
|
|
}
|
|
|
|
iib->uuid = ipmi_next_uuid();
|
|
|
|
iib->bt.bmc->intf = ii;
|
|
|
|
iic->init(ii, errp);
|
|
if (*errp)
|
|
return;
|
|
|
|
if (iib->isairq > 0) {
|
|
isa_init_irq(isadev, &iib->bt.irq, iib->isairq);
|
|
iib->bt.use_irq = 1;
|
|
}
|
|
|
|
qdev_set_legacy_instance_id(dev, iib->bt.io_base, iib->bt.io_length);
|
|
|
|
isa_register_ioport(isadev, &iib->bt.io, iib->bt.io_base);
|
|
}
|
|
|
|
static const VMStateDescription vmstate_ISAIPMIBTDevice = {
|
|
.name = TYPE_IPMI_INTERFACE,
|
|
.version_id = 1,
|
|
.minimum_version_id = 1,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_BOOL(bt.obf_irq_set, ISAIPMIBTDevice),
|
|
VMSTATE_BOOL(bt.atn_irq_set, ISAIPMIBTDevice),
|
|
VMSTATE_BOOL(bt.use_irq, ISAIPMIBTDevice),
|
|
VMSTATE_BOOL(bt.irqs_enabled, ISAIPMIBTDevice),
|
|
VMSTATE_UINT32(bt.outpos, ISAIPMIBTDevice),
|
|
VMSTATE_VBUFFER_UINT32(bt.outmsg, ISAIPMIBTDevice, 1, NULL, bt.outlen),
|
|
VMSTATE_VBUFFER_UINT32(bt.inmsg, ISAIPMIBTDevice, 1, NULL, bt.inlen),
|
|
VMSTATE_UINT8(bt.control_reg, ISAIPMIBTDevice),
|
|
VMSTATE_UINT8(bt.mask_reg, ISAIPMIBTDevice),
|
|
VMSTATE_UINT8(bt.waiting_rsp, ISAIPMIBTDevice),
|
|
VMSTATE_UINT8(bt.waiting_seq, ISAIPMIBTDevice),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static void isa_ipmi_bt_init(Object *obj)
|
|
{
|
|
ISAIPMIBTDevice *iib = ISA_IPMI_BT(obj);
|
|
|
|
ipmi_bmc_find_and_link(obj, (Object **) &iib->bt.bmc);
|
|
|
|
vmstate_register(NULL, 0, &vmstate_ISAIPMIBTDevice, iib);
|
|
}
|
|
|
|
static void *isa_ipmi_bt_get_backend_data(IPMIInterface *ii)
|
|
{
|
|
ISAIPMIBTDevice *iib = ISA_IPMI_BT(ii);
|
|
|
|
return &iib->bt;
|
|
}
|
|
|
|
static Property ipmi_isa_properties[] = {
|
|
DEFINE_PROP_UINT32("ioport", ISAIPMIBTDevice, bt.io_base, 0xe4),
|
|
DEFINE_PROP_INT32("irq", ISAIPMIBTDevice, isairq, 5),
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
static void isa_ipmi_bt_class_init(ObjectClass *oc, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(oc);
|
|
IPMIInterfaceClass *iic = IPMI_INTERFACE_CLASS(oc);
|
|
|
|
dc->realize = isa_ipmi_bt_realize;
|
|
dc->props = ipmi_isa_properties;
|
|
|
|
iic->get_backend_data = isa_ipmi_bt_get_backend_data;
|
|
ipmi_bt_class_init(iic);
|
|
}
|
|
|
|
static const TypeInfo isa_ipmi_bt_info = {
|
|
.name = TYPE_ISA_IPMI_BT,
|
|
.parent = TYPE_ISA_DEVICE,
|
|
.instance_size = sizeof(ISAIPMIBTDevice),
|
|
.instance_init = isa_ipmi_bt_init,
|
|
.class_init = isa_ipmi_bt_class_init,
|
|
.interfaces = (InterfaceInfo[]) {
|
|
{ TYPE_IPMI_INTERFACE },
|
|
{ }
|
|
}
|
|
};
|
|
|
|
static void ipmi_register_types(void)
|
|
{
|
|
type_register_static(&isa_ipmi_bt_info);
|
|
}
|
|
|
|
type_init(ipmi_register_types)
|