1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family 
4  * of PCI-SCSI IO processors.
6  * Copyright (C) 1999-2001  Gerard Roudier <groudier@free.fr>
8  * This driver is derived from the Linux sym53c8xx driver.
9  * Copyright (C) 1998-2000  Gerard Roudier
11  * The sym53c8xx driver is derived from the ncr53c8xx driver that had been 
12  * a port of the FreeBSD ncr driver to Linux-1.2.13.
14  * The original ncr driver has been written for 386bsd and FreeBSD by
16  *         Stefan Esser                <se@mi.Uni-Koeln.de>
24  *-----------------------------------------------------------------------------
30  *  Simple power of two buddy-like generic allocator.
35  *  Since the SCRIPTS processor only supplies 8 bit arithmetic, 
37  *  from the SCRIPTS code. In addition, cache line alignment 
40  *  This allocator has been developed for the Linux sym53c8xx  
43  *  It has the advantage of allowing the driver to use private 
53 	m_link_p h = mp->h;  in ___sym_malloc()
68 				h[j].next->next = NULL;  in ___sym_malloc()
76 		h[j].next = h[j].next->next;  in ___sym_malloc()
78 			j -= 1;  in ___sym_malloc()
81 			h[j].next->next = NULL;  in ___sym_malloc()
91  *  Counter-part of the generic allocator.
99 	m_link_p h = mp->h;  in ___sym_mfree()
120 			((m_link_p) a)->next = h[i].next;  in ___sym_mfree()
127 		while (q->next && q->next != (m_link_p) b) {  in ___sym_mfree()
128 			q = q->next;  in ___sym_mfree()
130 		if (!q->next) {  in ___sym_mfree()
131 			((m_link_p) a)->next = h[i].next;  in ___sym_mfree()
135 		q->next = q->next->next;  in ___sym_mfree()
143  *  Verbose and zeroing allocator that wrapps to the generic allocator.
152 		printf ("new %-10s[%4d] @%p.\n", name, size, p);  in __sym_calloc2()
164  *  Its counter-part.
169 		printf ("freeing %-10s[%4d] @%p.\n", name, size, ptr);  in __sym_mfree()
184 		++mp->nump;  in ___mp0_get_mem_cluster()
192 	--mp->nump;  in ___mp0_free_mem_cluster()
206  *  New pools are created on the fly when a new pool id is provided.
207  *  They are deleted on the fly when they get emptied.
209 /* Get a memory cluster that matches the DMA constraints of a given pool */
222 		vbp->next = mp->vtob[hc];  in ___get_dma_mem_cluster()
223 		mp->vtob[hc] = vbp;  in ___get_dma_mem_cluster()
224 		++mp->nump;  in ___get_dma_mem_cluster()
238 	vbpp = &mp->vtob[hc];  in ___free_dma_mem_cluster()
239 	while (*vbpp && (*vbpp)->vaddr != m)  in ___free_dma_mem_cluster()
240 		vbpp = &(*vbpp)->next;  in ___free_dma_mem_cluster()
243 		*vbpp = (*vbpp)->next;  in ___free_dma_mem_cluster()
246 		--mp->nump;  in ___free_dma_mem_cluster()
251 /* Fetch the memory pool for a given pool id (i.e. DMA constraints) */
256 		mp && !sym_m_pool_match(mp->dev_dmat, dev_dmat);  in ___get_dma_pool()
257 			mp = mp->next);  in ___get_dma_pool()
266 		mp->dev_dmat = dev_dmat;  in ___cre_dma_pool()
267 		mp->get_mem_cluster = ___get_dma_mem_cluster;  in ___cre_dma_pool()
269 		mp->free_mem_cluster = ___free_dma_mem_cluster;  in ___cre_dma_pool()
271 		mp->next = mp0.next;  in ___cre_dma_pool()
285 		pp = &(*pp)->next;  in ___del_dma_pool()
287 		*pp = (*pp)->next;  in ___del_dma_pool()
293 /* This lock protects only the memory allocation/free.  */
313 	if (!mp->nump)  in __sym_calloc_dma()
333 	if (!mp->nump)  in __sym_mfree_dma()
356 		vp = mp->vtob[hc];  in __vtobus()
357 		while (vp && vp->vaddr != a)  in __vtobus()
358 			vp = vp->next;  in __vtobus()
362 	b = vp->baddr + (m - a);  in __vtobus()