Commit 5f12ab4b10075e5ae87e95cdef305172e0de17c0

Authored by ths
1 parent af23902b

Add more ATAPI CDROM DMA support, by Juergen Keil.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2338 c046a42c-6fe2-441c-8c8c-71466251a162
Showing 1 changed file with 27 additions and 10 deletions
hw/ide.c
... ... @@ -394,6 +394,7 @@ typedef struct PCIIDEState {
394 394 } PCIIDEState;
395 395  
396 396 static void ide_dma_start(IDEState *s, BlockDriverCompletionFunc *dma_cb);
  397 +static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret);
397 398  
398 399 static void padstr(char *str, const char *src, int len)
399 400 {
... ... @@ -1063,11 +1064,17 @@ static void ide_atapi_cmd_reply(IDEState *s, int size, int max_size)
1063 1064 size = max_size;
1064 1065 s->lba = -1; /* no sector read */
1065 1066 s->packet_transfer_size = size;
  1067 + s->io_buffer_size = size; /* dma: send the reply data as one chunk */
1066 1068 s->elementary_transfer_size = 0;
1067 1069 s->io_buffer_index = 0;
1068 1070  
1069   - s->status = READY_STAT;
1070   - ide_atapi_cmd_reply_end(s);
  1071 + if (s->atapi_dma) {
  1072 + s->status = READY_STAT | DRQ_STAT;
  1073 + ide_dma_start(s, ide_atapi_cmd_read_dma_cb);
  1074 + } else {
  1075 + s->status = READY_STAT;
  1076 + ide_atapi_cmd_reply_end(s);
  1077 + }
1071 1078 }
1072 1079  
1073 1080 /* start a CD-CDROM read command */
... ... @@ -1099,14 +1106,23 @@ static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret)
1099 1106 }
1100 1107  
1101 1108 if (s->io_buffer_size > 0) {
1102   - if (s->cd_sector_size == 2352) {
1103   - n = 1;
1104   - cd_data_to_raw(s->io_buffer, s->lba);
1105   - } else {
1106   - n = s->io_buffer_size >> 11;
1107   - }
  1109 + /*
  1110 + * For a cdrom read sector command (s->lba != -1),
  1111 + * adjust the lba for the next s->io_buffer_size chunk
  1112 + * and dma the current chunk.
  1113 + * For a command != read (s->lba == -1), just transfer
  1114 + * the reply data.
  1115 + */
  1116 + if (s->lba != -1) {
  1117 + if (s->cd_sector_size == 2352) {
  1118 + n = 1;
  1119 + cd_data_to_raw(s->io_buffer, s->lba);
  1120 + } else {
  1121 + n = s->io_buffer_size >> 11;
  1122 + }
  1123 + s->lba += n;
  1124 + }
1108 1125 s->packet_transfer_size -= s->io_buffer_size;
1109   - s->lba += n;
1110 1126 if (dma_buf_rw(bm, 1) == 0)
1111 1127 goto eot;
1112 1128 }
... ... @@ -1170,7 +1186,8 @@ static void ide_atapi_cmd_read(IDEState *s, int lba, int nb_sectors,
1170 1186 int sector_size)
1171 1187 {
1172 1188 #ifdef DEBUG_IDE_ATAPI
1173   - printf("read: LBA=%d nb_sectors=%d\n", lba, nb_sectors);
  1189 + printf("read %s: LBA=%d nb_sectors=%d\n", s->atapi_dma ? "dma" : "pio",
  1190 + lba, nb_sectors);
1174 1191 #endif
1175 1192 if (s->atapi_dma) {
1176 1193 ide_atapi_cmd_read_dma(s, lba, nb_sectors, sector_size);
... ...