- /* TW: Now initialize the 310 series' command queue mode.
- * On 310/325, there are three queue modes available which
- * are chosen by setting bits 7:5 in SR26:
- * 1. MMIO queue mode (bit 5, 0x20). The hardware will keep
- * track of the queue, the FIFO, command parsing and so
- * on. This is the one comparable to the 300 series.
- * 2. VRAM queue mode (bit 6, 0x40). In this case, one will
- * have to do queue management himself. Register 0x85c4 will
- * hold the location of the next free queue slot, 0x85c8
- * is the "queue read pointer" whose way of working is
- * unknown to me. Anyway, this mode would require a
- * translation of the MMIO commands to some kind of
- * accelerator assembly and writing these commands
- * to the memory location pointed to by 0x85c4.
- * We will not use this, as nobody knows how this
- * "assembly" works, and as it would require a complete
- * re-write of the accelerator code.
- * 3. AGP queue mode (bit 7, 0x80). Works as 2., but keeps the
- * queue in AGP memory space.
- *
- * SR26 bit 4 is called "Bypass H/W queue".
- * SR26 bit 1 is called "Enable Command Queue Auto Correction"
- * SR26 bit 0 resets the queue
- * Size of queue memory is encoded in bits 3:2 like this:
- * 00 (0x00) 512K
- * 01 (0x04) 1M
- * 10 (0x08) 2M
- * 11 (0x0C) 4M
- * The queue location is to be written to 0x85C0.
- *
- */
- cmdq_baseport = (unsigned long *) (xgi_video_info.mmio_vbase
- + MMIO_QUEUE_PHYBASE);
- write_port = (unsigned long *) (xgi_video_info.mmio_vbase
- + MMIO_QUEUE_WRITEPORT);
- read_port = (unsigned long *) (xgi_video_info.mmio_vbase
- + MMIO_QUEUE_READPORT);
-
- DPRINTK("AGP base: 0x%p, read: 0x%p, write: 0x%p\n", cmdq_baseport, read_port, write_port);
-
- agp_size = COMMAND_QUEUE_AREA_SIZE;
-
-#ifndef AGPOFF
- if (XGIfb_queuemode == AGP_CMD_QUEUE) {
- agp_info = vzalloc(sizeof(*agp_info));
- agp_copy_info(agp_info);
-
- agp_backend_acquire();
-
- agp = agp_allocate_memory(COMMAND_QUEUE_AREA_SIZE / PAGE_SIZE,
- AGP_NORMAL_MEMORY);
- if (agp == NULL) {
- DPRINTK("XGIfb: Allocating AGP buffer failed.\n");
- agp_enabled = 0;
- } else {
- if (agp_bind_memory(agp, agp->pg_start) != 0) {
- DPRINTK("XGIfb: AGP: Failed to bind memory\n");
- /* TODO: Free AGP memory here */
- agp_enabled = 0;
- } else {
- agp_enable(0);
- }
- }
- }
-#else
- agp_enabled = 0;
-#endif
-
- /* TW: Now select the queue mode */
-
- if ((agp_enabled) && (XGIfb_queuemode == AGP_CMD_QUEUE)) {
- cmd_type = AGP_CMD_QUEUE;
- printk(KERN_INFO "XGIfb: Using AGP queue mode\n");
- /* } else if (XGIfb_heap_size >= COMMAND_QUEUE_AREA_SIZE) */
- } else if (XGIfb_queuemode == VM_CMD_QUEUE) {
- cmd_type = VM_CMD_QUEUE;
- printk(KERN_INFO "XGIfb: Using VRAM queue mode\n");
- } else {
- printk(KERN_INFO "XGIfb: Using MMIO queue mode\n");
- cmd_type = MMIO_CMD;
- }
-
- switch (agp_size) {
- case 0x80000:
- temp = XGI_CMD_QUEUE_SIZE_512k;
- break;
- case 0x100000:
- temp = XGI_CMD_QUEUE_SIZE_1M;
- break;
- case 0x200000:
- temp = XGI_CMD_QUEUE_SIZE_2M;
- break;
- case 0x400000:
- temp = XGI_CMD_QUEUE_SIZE_4M;
- break;
- }
-
- switch (cmd_type) {
- case AGP_CMD_QUEUE:
-#ifndef AGPOFF
- DPRINTK("XGIfb: AGP buffer base = 0x%lx, offset = 0x%x, size = %dK\n",
- agp_info->aper_base, agp->physical, agp_size/1024);
-
- agp_phys = agp_info->aper_base + agp->physical;
-
- outXGIIDXREG(XGICR, IND_XGI_AGP_IO_PAD, 0);
- outXGIIDXREG(XGICR, IND_XGI_AGP_IO_PAD, XGI_AGP_2X);
-
- outXGIIDXREG(XGISR, IND_XGI_CMDQUEUE_THRESHOLD, COMMAND_QUEUE_THRESHOLD);
-
- outXGIIDXREG(XGISR, IND_XGI_CMDQUEUE_SET, XGI_CMD_QUEUE_RESET);
-
- *write_port = *read_port;
-
- temp |= XGI_AGP_CMDQUEUE_ENABLE;
- outXGIIDXREG(XGISR, IND_XGI_CMDQUEUE_SET, temp);
-
- *cmdq_baseport = agp_phys;
-
- XGIfb_caps |= AGP_CMD_QUEUE_CAP;
-#endif
- break;
-
- case VM_CMD_QUEUE:
- XGIfb_heap_end -= COMMAND_QUEUE_AREA_SIZE;
- XGIfb_heap_size -= COMMAND_QUEUE_AREA_SIZE;
-
- outXGIIDXREG(XGISR, IND_XGI_CMDQUEUE_THRESHOLD, COMMAND_QUEUE_THRESHOLD);
-
- outXGIIDXREG(XGISR, IND_XGI_CMDQUEUE_SET, XGI_CMD_QUEUE_RESET);
-
- *write_port = *read_port;
-
- temp |= XGI_VRAM_CMDQUEUE_ENABLE;
- outXGIIDXREG(XGISR, IND_XGI_CMDQUEUE_SET, temp);
-
- *cmdq_baseport = xgi_video_info.video_size - COMMAND_QUEUE_AREA_SIZE;
-
- XGIfb_caps |= VM_CMD_QUEUE_CAP;
-
- DPRINTK("XGIfb: VM Cmd Queue offset = 0x%lx, size is %dK\n",
- *cmdq_baseport, COMMAND_QUEUE_AREA_SIZE/1024);
- break;
-
- default: /* MMIO */
-
- /* printk("%s:%d - I'm here\n", __FUNCTION__, __LINE__); */
- /* TW: This previously only wrote XGI_MMIO_CMD_ENABLE
- * to IND_XGI_CMDQUEUE_SET. I doubt that this is
- * enough. Reserve memory in any way.
- */
- /* FIXME XGIfb_heap_end -= COMMAND_QUEUE_AREA_SIZE; */
- /* FIXME XGIfb_heap_size -= COMMAND_QUEUE_AREA_SIZE; */
- /* FIXME */
- /* FIXME outXGIIDXREG(XGISR, IND_XGI_CMDQUEUE_THRESHOLD, COMMAND_QUEUE_THRESHOLD); */
- /* FIXME outXGIIDXREG(XGISR, IND_XGI_CMDQUEUE_SET, XGI_CMD_QUEUE_RESET); */
- /* FIXME */
- /* FIXME *write_port = *read_port; */
- /* FIXME */
- /* FIXME *//* TW: Set Auto_Correction bit */
- /* FIXME temp |= (XGI_MMIO_CMD_ENABLE | XGI_CMD_AUTO_CORR); */
- /* FIXME outXGIIDXREG(XGISR, IND_XGI_CMDQUEUE_SET, temp); */
- /* FIXME */
- /* FIXME *cmdq_baseport = xgi_video_info.video_size - COMMAND_QUEUE_AREA_SIZE; */
- /* FIXME */
- /* FIXME XGIfb_caps |= MMIO_CMD_QUEUE_CAP; */
- /* FIXME */
- /* FIXME DPRINTK("XGIfb: MMIO Cmd Queue offset = 0x%lx, size is %dK\n", */
- /* FIXME *cmdq_baseport, COMMAND_QUEUE_AREA_SIZE/1024); */
- break;
-}
-