@@ -209,6 +209,7 @@ static inline PnvChip *pnv_get_chip(PnvMachineState *pnv, uint32_t chip_id)
*/
void pnv_dt_bmc_sensors(IPMIBmc *bmc, void *fdt);
void pnv_bmc_powerdown(IPMIBmc *bmc);
+int pnv_bmc_hiomap(IPMIBmc *bmc);
/*
* POWER8 MMIO base addresses
@@ -9,6 +9,11 @@
#ifndef _PPC_PNV_PNOR_H
#define _PPC_PNV_PNOR_H
+/*
+ * PNOR offset on the LPC FW address space
+ */
+#define PNOR_SPI_OFFSET 0x0c000000UL
+
#define TYPE_PNV_PNOR "pnv-pnor"
#define PNV_PNOR(obj) OBJECT_CHECK(PnvPnor, (obj), TYPE_PNV_PNOR)
@@ -566,6 +566,7 @@ static void pnv_reset(MachineState *machine)
obj = object_resolve_path_type("", "ipmi-bmc-sim", NULL);
if (obj) {
pnv->bmc = IPMI_BMC(obj);
+ pnv_bmc_hiomap(pnv->bmc);
}
fdt = pnv_dt_create(machine);
@@ -114,3 +114,104 @@ void pnv_dt_bmc_sensors(IPMIBmc *bmc, void *fdt)
sdr->sensor_type)));
}
}
+
+/*
+ * HIOMAP protocol handler
+ */
+#define HIOMAP_C_RESET 1
+#define HIOMAP_C_GET_INFO 2
+#define HIOMAP_C_GET_FLASH_INFO 3
+#define HIOMAP_C_CREATE_READ_WINDOW 4
+#define HIOMAP_C_CLOSE_WINDOW 5
+#define HIOMAP_C_CREATE_WRITE_WINDOW 6
+#define HIOMAP_C_MARK_DIRTY 7
+#define HIOMAP_C_FLUSH 8
+#define HIOMAP_C_ACK 9
+#define HIOMAP_C_ERASE 10
+#define HIOMAP_C_DEVICE_NAME 11
+#define HIOMAP_C_LOCK 12
+
+#define BLOCK_SHIFT 12 /* 4K */
+
+static uint16_t bytes_to_blocks(uint32_t bytes)
+{
+ return bytes >> BLOCK_SHIFT;
+}
+
+static void hiomap_cmd(IPMIBmcSim *ibs, uint8_t *cmd, unsigned int cmd_len,
+ RspBuffer *rsp)
+{
+ PnvMachineState *pnv = PNV_MACHINE(qdev_get_machine());
+ PnvPnor *pnor = pnv->pnor;
+ uint32_t pnor_size = pnor->size;
+ uint32_t pnor_addr = PNOR_SPI_OFFSET;
+ bool readonly = false;
+
+ rsp_buffer_push(rsp, cmd[2]);
+ rsp_buffer_push(rsp, cmd[3]);
+
+ switch (cmd[2]) {
+ case HIOMAP_C_MARK_DIRTY:
+ case HIOMAP_C_FLUSH:
+ case HIOMAP_C_ERASE:
+ case HIOMAP_C_ACK:
+ break;
+
+ case HIOMAP_C_GET_INFO:
+ rsp_buffer_push(rsp, 2); /* Version 2 */
+ rsp_buffer_push(rsp, BLOCK_SHIFT); /* block size */
+ rsp_buffer_push(rsp, 0); /* Timeout */
+ rsp_buffer_push(rsp, 0); /* Timeout */
+ break;
+
+ case HIOMAP_C_GET_FLASH_INFO:
+ rsp_buffer_push(rsp, bytes_to_blocks(pnor_size) & 0xFF);
+ rsp_buffer_push(rsp, bytes_to_blocks(pnor_size) >> 8);
+ rsp_buffer_push(rsp, 0x01); /* erase size */
+ rsp_buffer_push(rsp, 0x00); /* erase size */
+ break;
+
+ case HIOMAP_C_CREATE_READ_WINDOW:
+ readonly = true;
+ /* Fall through */
+
+ case HIOMAP_C_CREATE_WRITE_WINDOW:
+ memory_region_set_readonly(&pnor->mmio, readonly);
+ memory_region_set_enabled(&pnor->mmio, true);
+
+ rsp_buffer_push(rsp, bytes_to_blocks(pnor_addr) & 0xFF);
+ rsp_buffer_push(rsp, bytes_to_blocks(pnor_addr) >> 8);
+ rsp_buffer_push(rsp, bytes_to_blocks(pnor_size) & 0xFF);
+ rsp_buffer_push(rsp, bytes_to_blocks(pnor_size) >> 8);
+ rsp_buffer_push(rsp, 0x00); /* offset */
+ rsp_buffer_push(rsp, 0x00); /* offset */
+ break;
+
+ case HIOMAP_C_CLOSE_WINDOW:
+ memory_region_set_enabled(&pnor->mmio, false);
+ break;
+
+ case HIOMAP_C_DEVICE_NAME:
+ case HIOMAP_C_RESET:
+ case HIOMAP_C_LOCK:
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR, "HIOMAP: unknow command %02X\n", cmd[2]);
+ break;
+ }
+}
+
+#define HIOMAP 0x5a
+
+static const IPMICmdHandler hiomap_cmds[] = {
+ [HIOMAP] = { hiomap_cmd, 3 },
+};
+
+static const IPMINetfn hiomap_netfn = {
+ .cmd_nums = ARRAY_SIZE(hiomap_cmds),
+ .cmd_handlers = hiomap_cmds
+};
+
+int pnv_bmc_hiomap(IPMIBmc *bmc)
+{
+ return ipmi_register_oem_netfn(bmc, &hiomap_netfn);
+}
@@ -801,6 +801,7 @@ ISABus *pnv_lpc_isa_create(PnvLpcController *lpc, bool use_cpld, Error **errp)
ISABus *isa_bus;
qemu_irq *irqs;
qemu_irq_handler handler;
+ PnvMachineState *pnv = PNV_MACHINE(qdev_get_machine());
/* let isa_bus_new() create its own bridge on SysBus otherwise
* devices speficied on the command line won't find the bus and
@@ -825,5 +826,17 @@ ISABus *pnv_lpc_isa_create(PnvLpcController *lpc, bool use_cpld, Error **errp)
irqs = qemu_allocate_irqs(handler, lpc, ISA_NUM_IRQS);
isa_bus_irqs(isa_bus, irqs);
+
+ /*
+ * TODO: Map PNOR on the LPC FW address space on demand ?
+ */
+ memory_region_add_subregion(&lpc->isa_fw, PNOR_SPI_OFFSET,
+ &pnv->pnor->mmio);
+ /*
+ * Start disabled. The HIOMAP protocol will activate the mapping
+ * with HIOMAP_C_CREATE_WRITE_WINDOW
+ */
+ memory_region_set_enabled(&pnv->pnor->mmio, false);
+
return isa_bus;
}
This activates HIOMAP support on the QEMU PowerNV machine. The PnvPnor model is used to access the flash contents. The model simply maps the contents at a fix offset and enables or disables the mapping. HIOMAP Protocol description : https://github.com/openbmc/hiomapd/blob/master/Documentation/protocol.md Signed-off-by: Cédric Le Goater <clg@kaod.org> --- include/hw/ppc/pnv.h | 1 + include/hw/ppc/pnv_pnor.h | 5 ++ hw/ppc/pnv.c | 1 + hw/ppc/pnv_bmc.c | 101 ++++++++++++++++++++++++++++++++++++++ hw/ppc/pnv_lpc.c | 13 +++++ 5 files changed, 121 insertions(+)