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author | Paolo Bonzini <pbonzini@redhat.com> | 2021-06-11 13:38:58 +0200 |
---|---|---|
committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-06-15 17:17:09 +0200 |
commit | 4eb86065603400fe27c17a346985a97b489b55d4 (patch) | |
tree | 3d2a8bdc2fa00e5ea5e4159346373f24e26d9bf9 | |
parent | 0bcd5a18940e1c1e3350b93cfadcdc6b58ca1c0e (diff) | |
download | qemu-4eb86065603400fe27c17a346985a97b489b55d4.zip qemu-4eb86065603400fe27c17a346985a97b489b55d4.tar.gz qemu-4eb86065603400fe27c17a346985a97b489b55d4.tar.bz2 |
esp: store lun coming from the MESSAGE OUT phase
The LUN is selected with an IDENTIFY message, and persists
until the next message out phase. Instead of passing it to
do_busid_cmd, store it in ESPState. Because do_cmd can simply
skip the message out phase if cmdfifo_cdb_offset is zero, it
can now be used for the S without ATN cases as well.
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
-rw-r--r-- | hw/scsi/esp.c | 47 | ||||
-rw-r--r-- | hw/scsi/trace-events | 3 | ||||
-rw-r--r-- | include/hw/scsi/esp.h | 1 |
3 files changed, 34 insertions, 17 deletions
diff --git a/hw/scsi/esp.c b/hw/scsi/esp.c index 8fad87b..4ac2114 100644 --- a/hw/scsi/esp.c +++ b/hw/scsi/esp.c @@ -221,7 +221,7 @@ static int esp_select(ESPState *s) /* * Note that we deliberately don't raise the IRQ here: this will be done - * either in do_busid_cmd() for DATA OUT transfers or by the deferred + * either in do_command_phase() for DATA OUT transfers or by the deferred * IRQ mechanism in esp_transfer_data() for DATA IN transfers */ s->rregs[ESP_RINTR] |= INTR_FC; @@ -272,24 +272,22 @@ static uint32_t get_cmd(ESPState *s, uint32_t maxlen) return dmalen; } -static void do_busid_cmd(ESPState *s, uint8_t busid) +static void do_command_phase(ESPState *s) { uint32_t cmdlen; int32_t datalen; - int lun; SCSIDevice *current_lun; uint8_t buf[ESP_CMDFIFO_SZ]; - trace_esp_do_busid_cmd(busid); - lun = busid & 7; + trace_esp_do_command_phase(s->lun); cmdlen = fifo8_num_used(&s->cmdfifo); if (!cmdlen || !s->current_dev) { return; } esp_fifo_pop_buf(&s->cmdfifo, buf, cmdlen); - current_lun = scsi_device_find(&s->bus, 0, s->current_dev->id, lun); - s->current_req = scsi_req_new(current_lun, 0, lun, buf, s); + current_lun = scsi_device_find(&s->bus, 0, s->current_dev->id, s->lun); + s->current_req = scsi_req_new(current_lun, 0, s->lun, buf, s); datalen = scsi_req_enqueue(s->current_req); s->ti_size = datalen; fifo8_reset(&s->cmdfifo); @@ -316,21 +314,29 @@ static void do_busid_cmd(ESPState *s, uint8_t busid) } } -static void do_cmd(ESPState *s) +static void do_message_phase(ESPState *s) { - uint8_t busid = esp_fifo_pop(&s->cmdfifo); - int len; + if (s->cmdfifo_cdb_offset) { + uint8_t message = esp_fifo_pop(&s->cmdfifo); - s->cmdfifo_cdb_offset--; + trace_esp_do_identify(message); + s->lun = message & 7; + s->cmdfifo_cdb_offset--; + } /* Ignore extended messages for now */ if (s->cmdfifo_cdb_offset) { - len = MIN(s->cmdfifo_cdb_offset, fifo8_num_used(&s->cmdfifo)); + int len = MIN(s->cmdfifo_cdb_offset, fifo8_num_used(&s->cmdfifo)); esp_fifo_pop_buf(&s->cmdfifo, NULL, len); s->cmdfifo_cdb_offset = 0; } +} - do_busid_cmd(s, busid); +static void do_cmd(ESPState *s) +{ + do_message_phase(s); + assert(s->cmdfifo_cdb_offset == 0); + do_command_phase(s); } static void satn_pdma_cb(ESPState *s) @@ -369,7 +375,7 @@ static void s_without_satn_pdma_cb(ESPState *s) if (!esp_get_tc(s) && !fifo8_is_empty(&s->cmdfifo)) { s->cmdfifo_cdb_offset = 0; s->do_cmd = 0; - do_busid_cmd(s, 0); + do_cmd(s); } } @@ -386,7 +392,7 @@ static void handle_s_without_atn(ESPState *s) if (cmdlen > 0) { s->cmdfifo_cdb_offset = 0; s->do_cmd = 0; - do_busid_cmd(s, 0); + do_cmd(s); } else if (cmdlen == 0) { s->do_cmd = 1; /* Target present, but no cmd yet - switch to command phase */ @@ -1131,6 +1137,14 @@ static bool esp_is_version_5(void *opaque, int version_id) return version_id >= 5; } +static bool esp_is_version_6(void *opaque, int version_id) +{ + ESPState *s = ESP(opaque); + + version_id = MIN(version_id, s->mig_version_id); + return version_id >= 6; +} + int esp_pre_save(void *opaque) { ESPState *s = ESP(object_resolve_path_component( @@ -1168,7 +1182,7 @@ static int esp_post_load(void *opaque, int version_id) const VMStateDescription vmstate_esp = { .name = "esp", - .version_id = 5, + .version_id = 6, .minimum_version_id = 3, .post_load = esp_post_load, .fields = (VMStateField[]) { @@ -1197,6 +1211,7 @@ const VMStateDescription vmstate_esp = { VMSTATE_FIFO8_TEST(fifo, ESPState, esp_is_version_5), VMSTATE_FIFO8_TEST(cmdfifo, ESPState, esp_is_version_5), VMSTATE_UINT8_TEST(ti_cmd, ESPState, esp_is_version_5), + VMSTATE_UINT8_TEST(lun, ESPState, esp_is_version_6), VMSTATE_END_OF_LIST() }, }; diff --git a/hw/scsi/trace-events b/hw/scsi/trace-events index 1a27e14..92d5b40 100644 --- a/hw/scsi/trace-events +++ b/hw/scsi/trace-events @@ -166,7 +166,8 @@ esp_dma_disable(void) "Lower enable" esp_pdma_read(int size) "pDMA read %u bytes" esp_pdma_write(int size) "pDMA write %u bytes" esp_get_cmd(uint32_t dmalen, int target) "len %d target %d" -esp_do_busid_cmd(uint8_t busid) "busid 0x%x" +esp_do_command_phase(uint8_t busid) "busid 0x%x" +esp_do_identify(uint8_t byte) "0x%x" esp_handle_satn_stop(uint32_t cmdlen) "cmdlen %d" esp_write_response(uint32_t status) "Transfer status (status=%d)" esp_do_dma(uint32_t cmdlen, uint32_t len) "command len %d + %d" diff --git a/include/hw/scsi/esp.h b/include/hw/scsi/esp.h index aada368..b1ec276 100644 --- a/include/hw/scsi/esp.h +++ b/include/hw/scsi/esp.h @@ -37,6 +37,7 @@ struct ESPState { SCSIRequest *current_req; Fifo8 cmdfifo; uint8_t cmdfifo_cdb_offset; + uint8_t lun; uint32_t do_cmd; bool data_in_ready; |