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[Qemu-devel] [PATCH v5 07/16] spapr_rtas: add ibm, configure-connector R
From: |
Michael Roth |
Subject: |
[Qemu-devel] [PATCH v5 07/16] spapr_rtas: add ibm, configure-connector RTAS interface |
Date: |
Mon, 16 Feb 2015 08:10:49 -0600 |
This interface is used to fetch an OF device-tree nodes that describes a
newly-attached device to guest. It is called multiple times to walk the
device-tree node and fetch individual properties into a 'workarea'/buffer
provided by the guest.
The device-tree is generated by QEMU and passed to an sPAPRDRConnector during
the initial hotplug operation, and the state of these RTAS calls is tracked by
the sPAPRDRConnector. When the last of these properties is successfully
fetched, we report as special return value to the guest and transition
the device to a 'configured' state on the QEMU/DRC side.
See docs/specs/ppc-spapr-hotplug.txt for a complete description of
this interface.
Signed-off-by: Michael Roth <address@hidden>
---
hw/ppc/spapr_rtas.c | 81 +++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 81 insertions(+)
diff --git a/hw/ppc/spapr_rtas.c b/hw/ppc/spapr_rtas.c
index f80beb2..b8551b0 100644
--- a/hw/ppc/spapr_rtas.c
+++ b/hw/ppc/spapr_rtas.c
@@ -418,6 +418,85 @@ static void rtas_get_sensor_state(PowerPCCPU *cpu,
sPAPREnvironment *spapr,
rtas_st(rets, 1, entity_sense);
}
+/* configure-connector work area offsets, int32_t units for field
+ * indexes, bytes for field offset/len values.
+ *
+ * as documented by PAPR+ v2.7, 13.5.3.5
+ */
+#define CC_IDX_NODE_NAME_OFFSET 2
+#define CC_IDX_PROP_NAME_OFFSET 2
+#define CC_IDX_PROP_LEN 3
+#define CC_IDX_PROP_DATA_OFFSET 4
+#define CC_VAL_DATA_OFFSET ((CC_IDX_PROP_DATA_OFFSET + 1) * 4)
+#define CC_WA_LEN 4096
+
+static void rtas_ibm_configure_connector(PowerPCCPU *cpu,
+ sPAPREnvironment *spapr,
+ uint32_t token, uint32_t nargs,
+ target_ulong args, uint32_t nret,
+ target_ulong rets)
+{
+ uint64_t wa_addr = ((uint64_t)rtas_ld(args, 1) << 32) | rtas_ld(args, 0);
+ uint64_t wa_offset;
+ uint32_t drc_index;
+ sPAPRDRConnector *drc;
+ sPAPRDRConnectorClass *drck;
+ sPAPRDRCCResponse resp;
+ const struct fdt_property *prop = NULL;
+ char *prop_name = NULL;
+ int prop_len, rc;
+
+ drc_index = rtas_ld(wa_addr, 0);
+ drc = spapr_dr_connector_by_index(drc_index);
+ if (!drc) {
+ DPRINTF("rtas_ibm_configure_connector: invalid sensor/DRC index:
%xh\n",
+ drc_index);
+ rc = RTAS_OUT_PARAM_ERROR;
+ goto out;
+ }
+ drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc);
+ resp = drck->configure_connector(drc, &prop_name, &prop, &prop_len);
+
+ switch (resp) {
+ case SPAPR_DR_CC_RESPONSE_NEXT_CHILD:
+ /* provide the name of the next OF node */
+ wa_offset = CC_VAL_DATA_OFFSET;
+ rtas_st(wa_addr, CC_IDX_NODE_NAME_OFFSET, wa_offset);
+ rtas_st_buffer_direct(wa_addr + wa_offset, CC_WA_LEN - wa_offset,
+ (uint8_t *)prop_name, strlen(prop_name) + 1);
+ break;
+ case SPAPR_DR_CC_RESPONSE_NEXT_PROPERTY:
+ /* provide the name of the next OF property */
+ wa_offset = CC_VAL_DATA_OFFSET;
+ rtas_st(wa_addr, CC_IDX_PROP_NAME_OFFSET, wa_offset);
+ rtas_st_buffer_direct(wa_addr + wa_offset, CC_WA_LEN - wa_offset,
+ (uint8_t *)prop_name, strlen(prop_name) + 1);
+
+ /* provide the length and value of the OF property. data gets placed
+ * immediately after NULL terminator of the OF property's name string
+ */
+ wa_offset += strlen(prop_name) + 1,
+ rtas_st(wa_addr, CC_IDX_PROP_LEN, prop_len);
+ rtas_st(wa_addr, CC_IDX_PROP_DATA_OFFSET, wa_offset);
+ rtas_st_buffer_direct(wa_addr + wa_offset, CC_WA_LEN - wa_offset,
+ (uint8_t *)((struct fdt_property *)prop)->data,
+ prop_len);
+ break;
+ case SPAPR_DR_CC_RESPONSE_PREV_PARENT:
+ case SPAPR_DR_CC_RESPONSE_ERROR:
+ case SPAPR_DR_CC_RESPONSE_SUCCESS:
+ break;
+ default:
+ /* drck->configure_connector() should not return anything else */
+ g_assert(false);
+ }
+
+ rc = resp;
+out:
+ g_free(prop_name);
+ rtas_st(rets, 0, rc);
+}
+
static struct rtas_call {
const char *name;
spapr_rtas_fn fn;
@@ -551,6 +630,8 @@ static void core_rtas_register_types(void)
rtas_set_indicator);
spapr_rtas_register(RTAS_GET_SENSOR_STATE, "get-sensor-state",
rtas_get_sensor_state);
+ spapr_rtas_register(RTAS_IBM_CONFIGURE_CONNECTOR,
"ibm,configure-connector",
+ rtas_ibm_configure_connector);
}
type_init(core_rtas_register_types)
--
1.9.1
- [Qemu-devel] [PATCH v5 13/16] spapr_pci: populate DRC dt entries for PHBs, (continued)
- [Qemu-devel] [PATCH v5 13/16] spapr_pci: populate DRC dt entries for PHBs, Michael Roth, 2015/02/16
- [Qemu-devel] [PATCH v5 11/16] spapr_pci: add dynamic-reconfiguration option for spapr-pci-host-bridge, Michael Roth, 2015/02/16
- [Qemu-devel] [PATCH v5 12/16] spapr_pci: create DRConnectors for each PCI slot during PHB realize, Michael Roth, 2015/02/16
- [Qemu-devel] [PATCH v5 16/16] spapr_pci: emit hotplug add/remove events during hotplug, Michael Roth, 2015/02/16
- [Qemu-devel] [PATCH v5 14/16] pci: make pci_bar useable outside pci.c, Michael Roth, 2015/02/16
- [Qemu-devel] [PATCH v5 03/16] spapr_rtas: add get/set-power-level RTAS interfaces, Michael Roth, 2015/02/16
- [Qemu-devel] [PATCH v5 15/16] spapr_pci: enable basic hotplug operations, Michael Roth, 2015/02/16
- [Qemu-devel] [PATCH v5 04/16] spapr_rtas: add set-indicator RTAS interface, Michael Roth, 2015/02/16
- [Qemu-devel] [PATCH v5 06/16] spapr: add rtas_st_buffer_direct() helper, Michael Roth, 2015/02/16
- [Qemu-devel] [PATCH v5 08/16] spapr_events: re-use EPOW event infrastructure for hotplug events, Michael Roth, 2015/02/16
- [Qemu-devel] [PATCH v5 07/16] spapr_rtas: add ibm, configure-connector RTAS interface,
Michael Roth <=
- [Qemu-devel] [PATCH v5 01/16] docs: add sPAPR hotplug/dynamic-reconfiguration documentation, Michael Roth, 2015/02/16
- [Qemu-devel] [PATCH v5 02/16] spapr_drc: initial implementation of sPAPRDRConnector device, Michael Roth, 2015/02/16
- [Qemu-devel] [PATCH v5 05/16] spapr_rtas: add get-sensor-state RTAS interface, Michael Roth, 2015/02/16
- Re: [Qemu-devel] [PATCH v5 00/16] spapr: add support for pci hotplug, Michael Roth, 2015/02/16