1 // SPDX-License-Identifier: GPL-2.0-or-later
10  *  acknowledged.  Full credit goes to them - any problems within this code
25  *  @sglist:	pointer to "scatter-gather list" of buffer pointers
26  *  @offset:	offset to target memory buffer
27  *  @sync_line:	0 -> no sync, 1 -> odd sync, 2 -> even sync
34 			    unsigned int offset, u32 sync_line,  in tw68_risc_field()  argument
57 		while (offset && offset >= sg_dma_len(sg)) {  in tw68_risc_field()
58 			offset -= sg_dma_len(sg);  in tw68_risc_field()
61 		if (bpl <= sg_dma_len(sg) - offset) {  in tw68_risc_field()
64 					      /* (offset<<12) |*/  bpl);  in tw68_risc_field()
65 			*(rp++) = cpu_to_le32(sg_dma_address(sg) + offset);  in tw68_risc_field()
66 			offset += bpl;  in tw68_risc_field()
72 			 * given by the scatter-gather list.  in tw68_risc_field()
76 			done = (sg_dma_len(sg) - offset);  in tw68_risc_field()
80 			*(rp++) = cpu_to_le32(sg_dma_address(sg) + offset);  in tw68_risc_field()
81 			todo -= done;  in tw68_risc_field()
83 			/* succeeding fragments have no offset */  in tw68_risc_field()
89 				todo -= sg_dma_len(sg);  in tw68_risc_field()
94 				/* final chunk - offset 0, count 'todo' */  in tw68_risc_field()
100 			offset = todo;  in tw68_risc_field()
102 		offset += padding;  in tw68_risc_field()
111  *	This routine is called by tw68-video.  It allocates
119  *	@sglist:	scatter-gather list entry
120  *	@top_offset:	offset within the risc program area for the
122  *	@bottom_offset:	offset within the risc program area for the
153 	buf->size = instructions * 8;  in tw68_risc_buffer()
154 	buf->cpu = pci_alloc_consistent(pci, buf->size, &buf->dma);  in tw68_risc_buffer()
155 	if (buf->cpu == NULL)  in tw68_risc_buffer()
156 		return -ENOMEM;  in tw68_risc_buffer()
159 	rp = buf->cpu;  in tw68_risc_buffer()
168 	buf->jmp = rp;  in tw68_risc_buffer()
169 	buf->cpu[1] = cpu_to_le32(buf->dma + 8);  in tw68_risc_buffer()
171 	BUG_ON((buf->jmp - buf->cpu + 2) * sizeof(buf->cpu[0]) > buf->size);  in tw68_risc_buffer()
176 /* ------------------------------------------------------------------ */
201 	pr_debug("0x%08x %-9s IRQ=%d",
217 	pr_debug("%s: risc_program_dump: risc=%p, buf->cpu=0x%p, buf->jmp=0x%p\n",
218 		  core->name, buf, buf->cpu, buf->jmp);
219 	for (addr = buf->cpu; addr <= buf->jmp; addr += 2)