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[PATCH v3 09/10] esp: include the current PDMA callback in the migration
From: |
Mark Cave-Ayland |
Subject: |
[PATCH v3 09/10] esp: include the current PDMA callback in the migration stream |
Date: |
Sat, 5 Mar 2022 15:55:29 +0000 |
This involves (re)adding a PDMA-specific subsection to hold the reference to the
current PDMA callback.
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
---
hw/scsi/esp.c | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
diff --git a/hw/scsi/esp.c b/hw/scsi/esp.c
index a818b2b07a..3f7cf30fa7 100644
--- a/hw/scsi/esp.c
+++ b/hw/scsi/esp.c
@@ -1209,6 +1209,33 @@ static int esp_post_load(void *opaque, int version_id)
return 0;
}
+/*
+ * PDMA (or pseudo-DMA) is only used on the Macintosh and requires the
+ * guest CPU to perform the transfers between the SCSI bus and memory
+ * itself. This is indicated by the dma_memory_read and dma_memory_write
+ * functions being NULL (in contrast to the ESP PCI device) whilst
+ * dma_enabled is still set.
+ */
+
+static bool esp_pdma_needed(void *opaque)
+{
+ ESPState *s = ESP(opaque);
+
+ return s->dma_memory_read == NULL && s->dma_memory_write == NULL &&
+ s->dma_enabled;
+}
+
+static const VMStateDescription vmstate_esp_pdma = {
+ .name = "esp/pdma",
+ .version_id = 0,
+ .minimum_version_id = 0,
+ .needed = esp_pdma_needed,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT8(pdma_cb, ESPState),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
const VMStateDescription vmstate_esp = {
.name = "esp",
.version_id = 6,
@@ -1243,6 +1270,10 @@ const VMStateDescription vmstate_esp = {
VMSTATE_UINT8_TEST(lun, ESPState, esp_is_version_6),
VMSTATE_END_OF_LIST()
},
+ .subsections = (const VMStateDescription * []) {
+ &vmstate_esp_pdma,
+ NULL
+ }
};
static void sysbus_esp_mem_write(void *opaque, hwaddr addr,
--
2.20.1
- [PATCH v3 00/10] q800: migration fixes, Mark Cave-Ayland, 2022/03/05
- [PATCH v3 01/10] macfb: add VMStateDescription for MacfbNubusState and MacfbSysBusState, Mark Cave-Ayland, 2022/03/05
- [PATCH v3 02/10] macfb: don't use special irq_state and irq_mask variables in MacfbState, Mark Cave-Ayland, 2022/03/05
- [PATCH v3 03/10] macfb: increase number of registers saved in MacfbState, Mark Cave-Ayland, 2022/03/05
- [PATCH v3 04/10] macfb: add VMStateDescription fields for display type and VBL timer, Mark Cave-Ayland, 2022/03/05
- [PATCH v3 05/10] macfb: set initial value of mode control registers in macfb_common_realize(), Mark Cave-Ayland, 2022/03/05
- [PATCH v3 06/10] esp: introduce esp_set_pdma_cb() function, Mark Cave-Ayland, 2022/03/05
- [PATCH v3 07/10] esp: introduce esp_pdma_cb() function, Mark Cave-Ayland, 2022/03/05
- [PATCH v3 09/10] esp: include the current PDMA callback in the migration stream,
Mark Cave-Ayland <=
- [PATCH v3 08/10] esp: convert ESPState pdma_cb from a function pointer to an integer, Mark Cave-Ayland, 2022/03/05
- [PATCH v3 10/10] esp: recreate ESPState current_req after migration, Mark Cave-Ayland, 2022/03/05