1 /* linux/arch/arm/common/pl330.c
3 * Copyright (C) 2010 Samsung Electronics Co Ltd.
4 * Jaswinder Singh <jassi.brar@samsung.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 #include <linux/kernel.h>
22 #include <linux/init.h>
23 #include <linux/slab.h>
24 #include <linux/module.h>
25 #include <linux/string.h>
27 #include <linux/delay.h>
28 #include <linux/interrupt.h>
29 #include <linux/dma-mapping.h>
31 #include <asm/hardware/pl330.h>
33 /* Register and Bit field Definitions */
35 #define DS_ST_STOP 0x0
36 #define DS_ST_EXEC 0x1
37 #define DS_ST_CMISS 0x2
38 #define DS_ST_UPDTPC 0x3
40 #define DS_ST_ATBRR 0x5
41 #define DS_ST_QBUSY 0x6
43 #define DS_ST_KILL 0x8
44 #define DS_ST_CMPLT 0x9
45 #define DS_ST_FLTCMP 0xe
46 #define DS_ST_FAULT 0xf
51 #define INTSTATUS 0x28
58 #define FTC(n) (_FTC + (n)*0x4)
61 #define CS(n) (_CS + (n)*0x8)
62 #define CS_CNS (1 << 21)
65 #define CPC(n) (_CPC + (n)*0x8)
68 #define SA(n) (_SA + (n)*0x20)
71 #define DA(n) (_DA + (n)*0x20)
74 #define CC(n) (_CC + (n)*0x20)
76 #define CC_SRCINC (1 << 0)
77 #define CC_DSTINC (1 << 14)
78 #define CC_SRCPRI (1 << 8)
79 #define CC_DSTPRI (1 << 22)
80 #define CC_SRCNS (1 << 9)
81 #define CC_DSTNS (1 << 23)
82 #define CC_SRCIA (1 << 10)
83 #define CC_DSTIA (1 << 24)
84 #define CC_SRCBRSTLEN_SHFT 4
85 #define CC_DSTBRSTLEN_SHFT 18
86 #define CC_SRCBRSTSIZE_SHFT 1
87 #define CC_DSTBRSTSIZE_SHFT 15
88 #define CC_SRCCCTRL_SHFT 11
89 #define CC_SRCCCTRL_MASK 0x7
90 #define CC_DSTCCTRL_SHFT 25
91 #define CC_DRCCCTRL_MASK 0x7
92 #define CC_SWAP_SHFT 28
95 #define LC0(n) (_LC0 + (n)*0x20)
98 #define LC1(n) (_LC1 + (n)*0x20)
100 #define DBGSTATUS 0xd00
101 #define DBG_BUSY (1 << 0)
104 #define DBGINST0 0xd08
105 #define DBGINST1 0xd0c
114 #define PERIPH_ID 0xfe0
115 #define PCELL_ID 0xff0
117 #define CR0_PERIPH_REQ_SET (1 << 0)
118 #define CR0_BOOT_EN_SET (1 << 1)
119 #define CR0_BOOT_MAN_NS (1 << 2)
120 #define CR0_NUM_CHANS_SHIFT 4
121 #define CR0_NUM_CHANS_MASK 0x7
122 #define CR0_NUM_PERIPH_SHIFT 12
123 #define CR0_NUM_PERIPH_MASK 0x1f
124 #define CR0_NUM_EVENTS_SHIFT 17
125 #define CR0_NUM_EVENTS_MASK 0x1f
127 #define CR1_ICACHE_LEN_SHIFT 0
128 #define CR1_ICACHE_LEN_MASK 0x7
129 #define CR1_NUM_ICACHELINES_SHIFT 4
130 #define CR1_NUM_ICACHELINES_MASK 0xf
132 #define CRD_DATA_WIDTH_SHIFT 0
133 #define CRD_DATA_WIDTH_MASK 0x7
134 #define CRD_WR_CAP_SHIFT 4
135 #define CRD_WR_CAP_MASK 0x7
136 #define CRD_WR_Q_DEP_SHIFT 8
137 #define CRD_WR_Q_DEP_MASK 0xf
138 #define CRD_RD_CAP_SHIFT 12
139 #define CRD_RD_CAP_MASK 0x7
140 #define CRD_RD_Q_DEP_SHIFT 16
141 #define CRD_RD_Q_DEP_MASK 0xf
142 #define CRD_DATA_BUFF_SHIFT 20
143 #define CRD_DATA_BUFF_MASK 0x3ff
146 #define DESIGNER 0x41
148 #define INTEG_CFG 0x0
149 #define PERIPH_ID_VAL ((PART << 0) | (DESIGNER << 12))
151 #define PCELL_ID_VAL 0xb105f00d
153 #define PL330_STATE_STOPPED (1 << 0)
154 #define PL330_STATE_EXECUTING (1 << 1)
155 #define PL330_STATE_WFE (1 << 2)
156 #define PL330_STATE_FAULTING (1 << 3)
157 #define PL330_STATE_COMPLETING (1 << 4)
158 #define PL330_STATE_WFP (1 << 5)
159 #define PL330_STATE_KILLING (1 << 6)
160 #define PL330_STATE_FAULT_COMPLETING (1 << 7)
161 #define PL330_STATE_CACHEMISS (1 << 8)
162 #define PL330_STATE_UPDTPC (1 << 9)
163 #define PL330_STATE_ATBARRIER (1 << 10)
164 #define PL330_STATE_QUEUEBUSY (1 << 11)
165 #define PL330_STATE_INVALID (1 << 15)
167 #define PL330_STABLE_STATES (PL330_STATE_STOPPED | PL330_STATE_EXECUTING \
168 | PL330_STATE_WFE | PL330_STATE_FAULTING)
170 #define CMD_DMAADDH 0x54
171 #define CMD_DMAEND 0x00
172 #define CMD_DMAFLUSHP 0x35
173 #define CMD_DMAGO 0xa0
174 #define CMD_DMALD 0x04
175 #define CMD_DMALDP 0x25
176 #define CMD_DMALP 0x20
177 #define CMD_DMALPEND 0x28
178 #define CMD_DMAKILL 0x01
179 #define CMD_DMAMOV 0xbc
180 #define CMD_DMANOP 0x18
181 #define CMD_DMARMB 0x12
182 #define CMD_DMASEV 0x34
183 #define CMD_DMAST 0x08
184 #define CMD_DMASTP 0x29
185 #define CMD_DMASTZ 0x0c
186 #define CMD_DMAWFE 0x36
187 #define CMD_DMAWFP 0x30
188 #define CMD_DMAWMB 0x13
192 #define SZ_DMAFLUSHP 2
196 #define SZ_DMALPEND 2
210 #define BRST_LEN(ccr) ((((ccr) >> CC_SRCBRSTLEN_SHFT) & 0xf) + 1)
211 #define BRST_SIZE(ccr) (1 << (((ccr) >> CC_SRCBRSTSIZE_SHFT) & 0x7))
213 #define BYTE_TO_BURST(b, ccr) ((b) / BRST_SIZE(ccr) / BRST_LEN(ccr))
214 #define BURST_TO_BYTE(c, ccr) ((c) * BRST_SIZE(ccr) * BRST_LEN(ccr))
217 * With 256 bytes, we can do more than 2.5MB and 5MB xfers per req
218 * at 1byte/burst for P<->M and M<->M respectively.
219 * For typical scenario, at 1word/burst, 10MB and 20MB xfers per req
220 * should be enough for P<->M and M<->M respectively.
222 #define MCODE_BUFF_PER_REQ 256
225 * Mark a _pl330_req as free.
226 * We do it by writing DMAEND as the first instruction
227 * because no valid request is going to have DMAEND as
228 * its first instruction to execute.
230 #define MARK_FREE(req) do { \
231 _emit_END(0, (req)->mc_cpu); \
235 /* If the _pl330_req is available to the client */
236 #define IS_FREE(req) (*((u8 *)((req)->mc_cpu)) == CMD_DMAEND)
238 /* Use this _only_ to wait on transient states */
239 #define UNTIL(t, s) while (!(_state(t) & (s))) cpu_relax();
241 #ifdef PL330_DEBUG_MCGEN
242 static unsigned cmd_line;
243 #define PL330_DBGCMD_DUMP(off, x...) do { \
244 printk("%x:", cmd_line); \
248 #define PL330_DBGMC_START(addr) (cmd_line = addr)
250 #define PL330_DBGCMD_DUMP(off, x...) do {} while (0)
251 #define PL330_DBGMC_START(addr) do {} while (0)
257 struct pl330_xfer *x;
280 /* Number of bytes taken to setup MC for the req */
283 /* Hook to attach to DMAC's list of reqs with due callback */
284 struct list_head rqd;
287 /* ToBeDone for tasklet */
295 struct pl330_thread {
298 /* If the channel is not yet acquired by any client */
301 struct pl330_dmac *dmac;
302 /* Only two at a time */
303 struct _pl330_req req[2];
304 /* Index of the last submitted request */
308 enum pl330_dmac_state {
317 /* Holds list of reqs with due callbacks */
318 struct list_head req_done;
319 /* Pointer to platform specific stuff */
320 struct pl330_info *pinfo;
321 /* Maximum possible events/irqs */
323 /* BUS address of MicroCode buffer */
325 /* CPU address of MicroCode buffer */
327 /* List of all Channel threads */
328 struct pl330_thread *channels;
329 /* Pointer to the MANAGER thread */
330 struct pl330_thread *manager;
331 /* To handle bad news in interrupt */
332 struct tasklet_struct tasks;
333 struct _pl330_tbd dmac_tbd;
334 /* State of DMAC operation */
335 enum pl330_dmac_state state;
338 static inline void _callback(struct pl330_req *r, enum pl330_op_err err)
341 r->xfer_cb(r->token, err);
344 static inline bool _queue_empty(struct pl330_thread *thrd)
346 return (IS_FREE(&thrd->req[0]) && IS_FREE(&thrd->req[1]))
350 static inline bool _queue_full(struct pl330_thread *thrd)
352 return (IS_FREE(&thrd->req[0]) || IS_FREE(&thrd->req[1]))
356 static inline bool is_manager(struct pl330_thread *thrd)
358 struct pl330_dmac *pl330 = thrd->dmac;
360 /* MANAGER is indexed at the end */
361 if (thrd->id == pl330->pinfo->pcfg.num_chan)
367 /* If manager of the thread is in Non-Secure mode */
368 static inline bool _manager_ns(struct pl330_thread *thrd)
370 struct pl330_dmac *pl330 = thrd->dmac;
372 return (pl330->pinfo->pcfg.mode & DMAC_MODE_NS) ? true : false;
375 static inline u32 get_id(struct pl330_info *pi, u32 off)
377 void __iomem *regs = pi->base;
380 id |= (readb(regs + off + 0x0) << 0);
381 id |= (readb(regs + off + 0x4) << 8);
382 id |= (readb(regs + off + 0x8) << 16);
383 id |= (readb(regs + off + 0xc) << 24);
388 static inline u32 _emit_ADDH(unsigned dry_run, u8 buf[],
389 enum pl330_dst da, u16 val)
394 buf[0] = CMD_DMAADDH;
396 *((u16 *)&buf[1]) = val;
398 PL330_DBGCMD_DUMP(SZ_DMAADDH, "\tDMAADDH %s %u\n",
399 da == 1 ? "DA" : "SA", val);
404 static inline u32 _emit_END(unsigned dry_run, u8 buf[])
411 PL330_DBGCMD_DUMP(SZ_DMAEND, "\tDMAEND\n");
416 static inline u32 _emit_FLUSHP(unsigned dry_run, u8 buf[], u8 peri)
421 buf[0] = CMD_DMAFLUSHP;
427 PL330_DBGCMD_DUMP(SZ_DMAFLUSHP, "\tDMAFLUSHP %u\n", peri >> 3);
432 static inline u32 _emit_LD(unsigned dry_run, u8 buf[], enum pl330_cond cond)
440 buf[0] |= (0 << 1) | (1 << 0);
441 else if (cond == BURST)
442 buf[0] |= (1 << 1) | (1 << 0);
444 PL330_DBGCMD_DUMP(SZ_DMALD, "\tDMALD%c\n",
445 cond == SINGLE ? 'S' : (cond == BURST ? 'B' : 'A'));
450 static inline u32 _emit_LDP(unsigned dry_run, u8 buf[],
451 enum pl330_cond cond, u8 peri)
465 PL330_DBGCMD_DUMP(SZ_DMALDP, "\tDMALDP%c %u\n",
466 cond == SINGLE ? 'S' : 'B', peri >> 3);
471 static inline u32 _emit_LP(unsigned dry_run, u8 buf[],
472 unsigned loop, u8 cnt)
482 cnt--; /* DMAC increments by 1 internally */
485 PL330_DBGCMD_DUMP(SZ_DMALP, "\tDMALP_%c %u\n", loop ? '1' : '0', cnt);
491 enum pl330_cond cond;
497 static inline u32 _emit_LPEND(unsigned dry_run, u8 buf[],
498 const struct _arg_LPEND *arg)
500 enum pl330_cond cond = arg->cond;
501 bool forever = arg->forever;
502 unsigned loop = arg->loop;
503 u8 bjump = arg->bjump;
508 buf[0] = CMD_DMALPEND;
517 buf[0] |= (0 << 1) | (1 << 0);
518 else if (cond == BURST)
519 buf[0] |= (1 << 1) | (1 << 0);
523 PL330_DBGCMD_DUMP(SZ_DMALPEND, "\tDMALP%s%c_%c bjmpto_%x\n",
524 forever ? "FE" : "END",
525 cond == SINGLE ? 'S' : (cond == BURST ? 'B' : 'A'),
532 static inline u32 _emit_KILL(unsigned dry_run, u8 buf[])
537 buf[0] = CMD_DMAKILL;
542 static inline u32 _emit_MOV(unsigned dry_run, u8 buf[],
543 enum dmamov_dst dst, u32 val)
550 *((u32 *)&buf[2]) = val;
552 PL330_DBGCMD_DUMP(SZ_DMAMOV, "\tDMAMOV %s 0x%x\n",
553 dst == SAR ? "SAR" : (dst == DAR ? "DAR" : "CCR"), val);
558 static inline u32 _emit_NOP(unsigned dry_run, u8 buf[])
565 PL330_DBGCMD_DUMP(SZ_DMANOP, "\tDMANOP\n");
570 static inline u32 _emit_RMB(unsigned dry_run, u8 buf[])
577 PL330_DBGCMD_DUMP(SZ_DMARMB, "\tDMARMB\n");
582 static inline u32 _emit_SEV(unsigned dry_run, u8 buf[], u8 ev)
593 PL330_DBGCMD_DUMP(SZ_DMASEV, "\tDMASEV %u\n", ev >> 3);
598 static inline u32 _emit_ST(unsigned dry_run, u8 buf[], enum pl330_cond cond)
606 buf[0] |= (0 << 1) | (1 << 0);
607 else if (cond == BURST)
608 buf[0] |= (1 << 1) | (1 << 0);
610 PL330_DBGCMD_DUMP(SZ_DMAST, "\tDMAST%c\n",
611 cond == SINGLE ? 'S' : (cond == BURST ? 'B' : 'A'));
616 static inline u32 _emit_STP(unsigned dry_run, u8 buf[],
617 enum pl330_cond cond, u8 peri)
631 PL330_DBGCMD_DUMP(SZ_DMASTP, "\tDMASTP%c %u\n",
632 cond == SINGLE ? 'S' : 'B', peri >> 3);
637 static inline u32 _emit_STZ(unsigned dry_run, u8 buf[])
644 PL330_DBGCMD_DUMP(SZ_DMASTZ, "\tDMASTZ\n");
649 static inline u32 _emit_WFE(unsigned dry_run, u8 buf[], u8 ev,
664 PL330_DBGCMD_DUMP(SZ_DMAWFE, "\tDMAWFE %u%s\n",
665 ev >> 3, invalidate ? ", I" : "");
670 static inline u32 _emit_WFP(unsigned dry_run, u8 buf[],
671 enum pl330_cond cond, u8 peri)
679 buf[0] |= (0 << 1) | (0 << 0);
680 else if (cond == BURST)
681 buf[0] |= (1 << 1) | (0 << 0);
683 buf[0] |= (0 << 1) | (1 << 0);
689 PL330_DBGCMD_DUMP(SZ_DMAWFP, "\tDMAWFP%c %u\n",
690 cond == SINGLE ? 'S' : (cond == BURST ? 'B' : 'P'), peri >> 3);
695 static inline u32 _emit_WMB(unsigned dry_run, u8 buf[])
702 PL330_DBGCMD_DUMP(SZ_DMAWMB, "\tDMAWMB\n");
713 static inline u32 _emit_GO(unsigned dry_run, u8 buf[],
714 const struct _arg_GO *arg)
717 u32 addr = arg->addr;
718 unsigned ns = arg->ns;
728 *((u32 *)&buf[2]) = addr;
733 #define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t)
735 /* Returns Time-Out */
736 static bool _until_dmac_idle(struct pl330_thread *thrd)
738 void __iomem *regs = thrd->dmac->pinfo->base;
739 unsigned long loops = msecs_to_loops(5);
742 /* Until Manager is Idle */
743 if (!(readl(regs + DBGSTATUS) & DBG_BUSY))
755 static inline void _execute_DBGINSN(struct pl330_thread *thrd,
756 u8 insn[], bool as_manager)
758 void __iomem *regs = thrd->dmac->pinfo->base;
761 val = (insn[0] << 16) | (insn[1] << 24);
764 val |= (thrd->id << 8); /* Channel Number */
766 writel(val, regs + DBGINST0);
768 val = *((u32 *)&insn[2]);
769 writel(val, regs + DBGINST1);
771 /* If timed out due to halted state-machine */
772 if (_until_dmac_idle(thrd)) {
773 dev_err(thrd->dmac->pinfo->dev, "DMAC halted!\n");
778 writel(0, regs + DBGCMD);
781 static inline u32 _state(struct pl330_thread *thrd)
783 void __iomem *regs = thrd->dmac->pinfo->base;
786 if (is_manager(thrd))
787 val = readl(regs + DS) & 0xf;
789 val = readl(regs + CS(thrd->id)) & 0xf;
793 return PL330_STATE_STOPPED;
795 return PL330_STATE_EXECUTING;
797 return PL330_STATE_CACHEMISS;
799 return PL330_STATE_UPDTPC;
801 return PL330_STATE_WFE;
803 return PL330_STATE_FAULTING;
805 if (is_manager(thrd))
806 return PL330_STATE_INVALID;
808 return PL330_STATE_ATBARRIER;
810 if (is_manager(thrd))
811 return PL330_STATE_INVALID;
813 return PL330_STATE_QUEUEBUSY;
815 if (is_manager(thrd))
816 return PL330_STATE_INVALID;
818 return PL330_STATE_WFP;
820 if (is_manager(thrd))
821 return PL330_STATE_INVALID;
823 return PL330_STATE_KILLING;
825 if (is_manager(thrd))
826 return PL330_STATE_INVALID;
828 return PL330_STATE_COMPLETING;
830 if (is_manager(thrd))
831 return PL330_STATE_INVALID;
833 return PL330_STATE_FAULT_COMPLETING;
835 return PL330_STATE_INVALID;
839 /* If the request 'req' of thread 'thrd' is currently active */
840 static inline bool _req_active(struct pl330_thread *thrd,
841 struct _pl330_req *req)
843 void __iomem *regs = thrd->dmac->pinfo->base;
844 u32 buf = req->mc_bus, pc = readl(regs + CPC(thrd->id));
849 return (pc >= buf && pc <= buf + req->mc_len) ? true : false;
852 /* Returns 0 if the thread is inactive, ID of active req + 1 otherwise */
853 static inline unsigned _thrd_active(struct pl330_thread *thrd)
855 if (_req_active(thrd, &thrd->req[0]))
856 return 1; /* First req active */
858 if (_req_active(thrd, &thrd->req[1]))
859 return 2; /* Second req active */
864 static void _stop(struct pl330_thread *thrd)
866 void __iomem *regs = thrd->dmac->pinfo->base;
867 u8 insn[6] = {0, 0, 0, 0, 0, 0};
869 if (_state(thrd) == PL330_STATE_FAULT_COMPLETING)
870 UNTIL(thrd, PL330_STATE_FAULTING | PL330_STATE_KILLING);
872 /* Return if nothing needs to be done */
873 if (_state(thrd) == PL330_STATE_COMPLETING
874 || _state(thrd) == PL330_STATE_KILLING
875 || _state(thrd) == PL330_STATE_STOPPED)
880 /* Stop generating interrupts for SEV */
881 writel(readl(regs + INTEN) & ~(1 << thrd->ev), regs + INTEN);
883 _execute_DBGINSN(thrd, insn, is_manager(thrd));
886 /* Start doing req 'idx' of thread 'thrd' */
887 static bool _trigger(struct pl330_thread *thrd)
889 void __iomem *regs = thrd->dmac->pinfo->base;
890 struct _pl330_req *req;
894 u8 insn[6] = {0, 0, 0, 0, 0, 0};
896 /* Return if already ACTIVE */
897 if (_state(thrd) != PL330_STATE_STOPPED)
900 if (!IS_FREE(&thrd->req[1 - thrd->lstenq]))
901 req = &thrd->req[1 - thrd->lstenq];
902 else if (!IS_FREE(&thrd->req[thrd->lstenq]))
903 req = &thrd->req[thrd->lstenq];
907 /* Return if no request */
914 ns = r->cfg->nonsecure ? 1 : 0;
915 else if (readl(regs + CS(thrd->id)) & CS_CNS)
920 /* See 'Abort Sources' point-4 at Page 2-25 */
921 if (_manager_ns(thrd) && !ns)
922 dev_info(thrd->dmac->pinfo->dev, "%s:%d Recipe for ABORT!\n",
926 go.addr = req->mc_bus;
928 _emit_GO(0, insn, &go);
930 /* Set to generate interrupts for SEV */
931 writel(readl(regs + INTEN) | (1 << thrd->ev), regs + INTEN);
933 /* Only manager can execute GO */
934 _execute_DBGINSN(thrd, insn, true);
939 static bool _start(struct pl330_thread *thrd)
941 switch (_state(thrd)) {
942 case PL330_STATE_FAULT_COMPLETING:
943 UNTIL(thrd, PL330_STATE_FAULTING | PL330_STATE_KILLING);
945 if (_state(thrd) == PL330_STATE_KILLING)
946 UNTIL(thrd, PL330_STATE_STOPPED)
948 case PL330_STATE_FAULTING:
951 case PL330_STATE_KILLING:
952 case PL330_STATE_COMPLETING:
953 UNTIL(thrd, PL330_STATE_STOPPED)
955 case PL330_STATE_STOPPED:
956 return _trigger(thrd);
958 case PL330_STATE_WFP:
959 case PL330_STATE_QUEUEBUSY:
960 case PL330_STATE_ATBARRIER:
961 case PL330_STATE_UPDTPC:
962 case PL330_STATE_CACHEMISS:
963 case PL330_STATE_EXECUTING:
966 case PL330_STATE_WFE: /* For RESUME, nothing yet */
972 static inline int _ldst_memtomem(unsigned dry_run, u8 buf[],
973 const struct _xfer_spec *pxs, int cyc)
978 off += _emit_LD(dry_run, &buf[off], ALWAYS);
979 off += _emit_RMB(dry_run, &buf[off]);
980 off += _emit_ST(dry_run, &buf[off], ALWAYS);
981 off += _emit_WMB(dry_run, &buf[off]);
987 static inline int _ldst_devtomem(unsigned dry_run, u8 buf[],
988 const struct _xfer_spec *pxs, int cyc)
993 off += _emit_WFP(dry_run, &buf[off], SINGLE, pxs->r->peri);
994 off += _emit_LDP(dry_run, &buf[off], SINGLE, pxs->r->peri);
995 off += _emit_ST(dry_run, &buf[off], ALWAYS);
996 off += _emit_FLUSHP(dry_run, &buf[off], pxs->r->peri);
1002 static inline int _ldst_memtodev(unsigned dry_run, u8 buf[],
1003 const struct _xfer_spec *pxs, int cyc)
1008 off += _emit_WFP(dry_run, &buf[off], SINGLE, pxs->r->peri);
1009 off += _emit_LD(dry_run, &buf[off], ALWAYS);
1010 off += _emit_STP(dry_run, &buf[off], SINGLE, pxs->r->peri);
1011 off += _emit_FLUSHP(dry_run, &buf[off], pxs->r->peri);
1017 static int _bursts(unsigned dry_run, u8 buf[],
1018 const struct _xfer_spec *pxs, int cyc)
1022 switch (pxs->r->rqtype) {
1024 off += _ldst_memtodev(dry_run, &buf[off], pxs, cyc);
1027 off += _ldst_devtomem(dry_run, &buf[off], pxs, cyc);
1030 off += _ldst_memtomem(dry_run, &buf[off], pxs, cyc);
1033 off += 0x40000000; /* Scare off the Client */
1040 /* Returns bytes consumed and updates bursts */
1041 static inline int _loop(unsigned dry_run, u8 buf[],
1042 unsigned long *bursts, const struct _xfer_spec *pxs)
1044 int cyc, cycmax, szlp, szlpend, szbrst, off;
1045 unsigned lcnt0, lcnt1, ljmp0, ljmp1;
1046 struct _arg_LPEND lpend;
1048 /* Max iterations possibile in DMALP is 256 */
1049 if (*bursts >= 256*256) {
1052 cyc = *bursts / lcnt1 / lcnt0;
1053 } else if (*bursts > 256) {
1055 lcnt0 = *bursts / lcnt1;
1063 szlp = _emit_LP(1, buf, 0, 0);
1064 szbrst = _bursts(1, buf, pxs, 1);
1066 lpend.cond = ALWAYS;
1067 lpend.forever = false;
1070 szlpend = _emit_LPEND(1, buf, &lpend);
1078 * Max bursts that we can unroll due to limit on the
1079 * size of backward jump that can be encoded in DMALPEND
1080 * which is 8-bits and hence 255
1082 cycmax = (255 - (szlp + szlpend)) / szbrst;
1084 cyc = (cycmax < cyc) ? cycmax : cyc;
1089 off += _emit_LP(dry_run, &buf[off], 0, lcnt0);
1093 off += _emit_LP(dry_run, &buf[off], 1, lcnt1);
1096 off += _bursts(dry_run, &buf[off], pxs, cyc);
1098 lpend.cond = ALWAYS;
1099 lpend.forever = false;
1101 lpend.bjump = off - ljmp1;
1102 off += _emit_LPEND(dry_run, &buf[off], &lpend);
1105 lpend.cond = ALWAYS;
1106 lpend.forever = false;
1108 lpend.bjump = off - ljmp0;
1109 off += _emit_LPEND(dry_run, &buf[off], &lpend);
1112 *bursts = lcnt1 * cyc;
1119 static inline int _setup_loops(unsigned dry_run, u8 buf[],
1120 const struct _xfer_spec *pxs)
1122 struct pl330_xfer *x = pxs->x;
1124 unsigned long c, bursts = BYTE_TO_BURST(x->bytes, ccr);
1129 off += _loop(dry_run, &buf[off], &c, pxs);
1136 static inline int _setup_xfer(unsigned dry_run, u8 buf[],
1137 const struct _xfer_spec *pxs)
1139 struct pl330_xfer *x = pxs->x;
1142 /* DMAMOV SAR, x->src_addr */
1143 off += _emit_MOV(dry_run, &buf[off], SAR, x->src_addr);
1144 /* DMAMOV DAR, x->dst_addr */
1145 off += _emit_MOV(dry_run, &buf[off], DAR, x->dst_addr);
1148 off += _setup_loops(dry_run, &buf[off], pxs);
1154 * A req is a sequence of one or more xfer units.
1155 * Returns the number of bytes taken to setup the MC for the req.
1157 static int _setup_req(unsigned dry_run, struct pl330_thread *thrd,
1158 unsigned index, struct _xfer_spec *pxs)
1160 struct _pl330_req *req = &thrd->req[index];
1161 struct pl330_xfer *x;
1162 u8 *buf = req->mc_cpu;
1165 PL330_DBGMC_START(req->mc_bus);
1167 /* DMAMOV CCR, ccr */
1168 off += _emit_MOV(dry_run, &buf[off], CCR, pxs->ccr);
1172 /* Error if xfer length is not aligned at burst size */
1173 if (x->bytes % (BRST_SIZE(pxs->ccr) * BRST_LEN(pxs->ccr)))
1177 off += _setup_xfer(dry_run, &buf[off], pxs);
1182 /* DMASEV peripheral/event */
1183 off += _emit_SEV(dry_run, &buf[off], thrd->ev);
1185 off += _emit_END(dry_run, &buf[off]);
1190 static inline u32 _prepare_ccr(const struct pl330_reqcfg *rqc)
1200 /* We set same protection levels for Src and DST for now */
1201 if (rqc->privileged)
1202 ccr |= CC_SRCPRI | CC_DSTPRI;
1204 ccr |= CC_SRCNS | CC_DSTNS;
1205 if (rqc->insnaccess)
1206 ccr |= CC_SRCIA | CC_DSTIA;
1208 ccr |= (((rqc->brst_len - 1) & 0xf) << CC_SRCBRSTLEN_SHFT);
1209 ccr |= (((rqc->brst_len - 1) & 0xf) << CC_DSTBRSTLEN_SHFT);
1211 ccr |= (rqc->brst_size << CC_SRCBRSTSIZE_SHFT);
1212 ccr |= (rqc->brst_size << CC_DSTBRSTSIZE_SHFT);
1214 ccr |= (rqc->dcctl << CC_SRCCCTRL_SHFT);
1215 ccr |= (rqc->scctl << CC_DSTCCTRL_SHFT);
1217 ccr |= (rqc->swap << CC_SWAP_SHFT);
1222 static inline bool _is_valid(u32 ccr)
1224 enum pl330_dstcachectrl dcctl;
1225 enum pl330_srccachectrl scctl;
1227 dcctl = (ccr >> CC_DSTCCTRL_SHFT) & CC_DRCCCTRL_MASK;
1228 scctl = (ccr >> CC_SRCCCTRL_SHFT) & CC_SRCCCTRL_MASK;
1230 if (dcctl == DINVALID1 || dcctl == DINVALID2
1231 || scctl == SINVALID1 || scctl == SINVALID2)
1238 * Submit a list of xfers after which the client wants notification.
1239 * Client is not notified after each xfer unit, just once after all
1240 * xfer units are done or some error occurs.
1242 int pl330_submit_req(void *ch_id, struct pl330_req *r)
1244 struct pl330_thread *thrd = ch_id;
1245 struct pl330_dmac *pl330;
1246 struct pl330_info *pi;
1247 struct _xfer_spec xs;
1248 unsigned long flags;
1254 /* No Req or Unacquired Channel or DMAC */
1255 if (!r || !thrd || thrd->free)
1262 if (pl330->state == DYING
1263 || pl330->dmac_tbd.reset_chan & (1 << thrd->id)) {
1264 dev_info(thrd->dmac->pinfo->dev, "%s:%d\n",
1265 __func__, __LINE__);
1269 /* If request for non-existing peripheral */
1270 if (r->rqtype != MEMTOMEM && r->peri >= pi->pcfg.num_peri) {
1271 dev_info(thrd->dmac->pinfo->dev,
1272 "%s:%d Invalid peripheral(%u)!\n",
1273 __func__, __LINE__, r->peri);
1277 spin_lock_irqsave(&pl330->lock, flags);
1279 if (_queue_full(thrd)) {
1284 /* Prefer Secure Channel */
1285 if (!_manager_ns(thrd))
1286 r->cfg->nonsecure = 0;
1288 r->cfg->nonsecure = 1;
1290 /* Use last settings, if not provided */
1292 ccr = _prepare_ccr(r->cfg);
1294 ccr = readl(regs + CC(thrd->id));
1296 /* If this req doesn't have valid xfer settings */
1297 if (!_is_valid(ccr)) {
1299 dev_info(thrd->dmac->pinfo->dev, "%s:%d Invalid CCR(%x)!\n",
1300 __func__, __LINE__, ccr);
1304 idx = IS_FREE(&thrd->req[0]) ? 0 : 1;
1309 /* First dry run to check if req is acceptable */
1310 ret = _setup_req(1, thrd, idx, &xs);
1314 if (ret > pi->mcbufsz / 2) {
1315 dev_info(thrd->dmac->pinfo->dev,
1316 "%s:%d Trying increasing mcbufsz\n",
1317 __func__, __LINE__);
1322 /* Hook the request */
1324 thrd->req[idx].mc_len = _setup_req(0, thrd, idx, &xs);
1325 thrd->req[idx].r = r;
1330 spin_unlock_irqrestore(&pl330->lock, flags);
1334 EXPORT_SYMBOL(pl330_submit_req);
1336 static void pl330_dotask(unsigned long data)
1338 struct pl330_dmac *pl330 = (struct pl330_dmac *) data;
1339 struct pl330_info *pi = pl330->pinfo;
1340 unsigned long flags;
1343 spin_lock_irqsave(&pl330->lock, flags);
1345 /* The DMAC itself gone nuts */
1346 if (pl330->dmac_tbd.reset_dmac) {
1347 pl330->state = DYING;
1348 /* Reset the manager too */
1349 pl330->dmac_tbd.reset_mngr = true;
1350 /* Clear the reset flag */
1351 pl330->dmac_tbd.reset_dmac = false;
1354 if (pl330->dmac_tbd.reset_mngr) {
1355 _stop(pl330->manager);
1356 /* Reset all channels */
1357 pl330->dmac_tbd.reset_chan = (1 << pi->pcfg.num_chan) - 1;
1358 /* Clear the reset flag */
1359 pl330->dmac_tbd.reset_mngr = false;
1362 for (i = 0; i < pi->pcfg.num_chan; i++) {
1364 if (pl330->dmac_tbd.reset_chan & (1 << i)) {
1365 struct pl330_thread *thrd = &pl330->channels[i];
1366 void __iomem *regs = pi->base;
1367 enum pl330_op_err err;
1371 if (readl(regs + FSC) & (1 << thrd->id))
1372 err = PL330_ERR_FAIL;
1374 err = PL330_ERR_ABORT;
1376 spin_unlock_irqrestore(&pl330->lock, flags);
1378 _callback(thrd->req[1 - thrd->lstenq].r, err);
1379 _callback(thrd->req[thrd->lstenq].r, err);
1381 spin_lock_irqsave(&pl330->lock, flags);
1383 thrd->req[0].r = NULL;
1384 thrd->req[1].r = NULL;
1385 MARK_FREE(&thrd->req[0]);
1386 MARK_FREE(&thrd->req[1]);
1388 /* Clear the reset flag */
1389 pl330->dmac_tbd.reset_chan &= ~(1 << i);
1393 spin_unlock_irqrestore(&pl330->lock, flags);
1398 /* Returns 1 if state was updated, 0 otherwise */
1399 int pl330_update(const struct pl330_info *pi)
1401 struct _pl330_req *rqdone;
1402 struct pl330_dmac *pl330;
1403 unsigned long flags;
1406 int id, ev, ret = 0;
1408 if (!pi || !pi->pl330_data)
1412 pl330 = pi->pl330_data;
1414 spin_lock_irqsave(&pl330->lock, flags);
1416 val = readl(regs + FSM) & 0x1;
1418 pl330->dmac_tbd.reset_mngr = true;
1420 pl330->dmac_tbd.reset_mngr = false;
1422 val = readl(regs + FSC) & ((1 << pi->pcfg.num_chan) - 1);
1423 pl330->dmac_tbd.reset_chan |= val;
1426 while (i < pi->pcfg.num_chan) {
1427 if (val & (1 << i)) {
1429 "Reset Channel-%d\t CS-%x FTC-%x\n",
1430 i, readl(regs + CS(i)),
1431 readl(regs + FTC(i)));
1432 _stop(&pl330->channels[i]);
1438 /* Check which event happened i.e, thread notified */
1439 val = readl(regs + ES);
1440 if (pi->pcfg.num_events < 32
1441 && val & ~((1 << pi->pcfg.num_events) - 1)) {
1442 pl330->dmac_tbd.reset_dmac = true;
1443 dev_err(pi->dev, "%s:%d Unexpected!\n", __func__, __LINE__);
1448 for (ev = 0; ev < pi->pcfg.num_events; ev++) {
1449 if (val & (1 << ev)) { /* Event occured */
1450 struct pl330_thread *thrd;
1451 u32 inten = readl(regs + INTEN);
1454 /* Clear the event */
1455 if (inten & (1 << ev))
1456 writel(1 << ev, regs + INTCLR);
1460 id = pl330->events[ev];
1462 thrd = &pl330->channels[id];
1464 active = _thrd_active(thrd);
1465 if (!active) /* Aborted */
1470 rqdone = &thrd->req[active];
1473 /* Get going again ASAP */
1476 /* For now, just make a list of callbacks to be done */
1477 list_add_tail(&rqdone->rqd, &pl330->req_done);
1481 /* Now that we are in no hurry, do the callbacks */
1482 while (!list_empty(&pl330->req_done)) {
1483 rqdone = container_of(pl330->req_done.next,
1484 struct _pl330_req, rqd);
1486 list_del_init(&rqdone->rqd);
1488 spin_unlock_irqrestore(&pl330->lock, flags);
1489 _callback(rqdone->r, PL330_ERR_NONE);
1490 spin_lock_irqsave(&pl330->lock, flags);
1494 spin_unlock_irqrestore(&pl330->lock, flags);
1496 if (pl330->dmac_tbd.reset_dmac
1497 || pl330->dmac_tbd.reset_mngr
1498 || pl330->dmac_tbd.reset_chan) {
1500 tasklet_schedule(&pl330->tasks);
1505 EXPORT_SYMBOL(pl330_update);
1507 int pl330_chan_ctrl(void *ch_id, enum pl330_chan_op op)
1509 struct pl330_thread *thrd = ch_id;
1510 struct pl330_dmac *pl330;
1511 unsigned long flags;
1512 int ret = 0, active;
1514 if (!thrd || thrd->free || thrd->dmac->state == DYING)
1519 spin_lock_irqsave(&pl330->lock, flags);
1522 case PL330_OP_FLUSH:
1523 /* Make sure the channel is stopped */
1526 thrd->req[0].r = NULL;
1527 thrd->req[1].r = NULL;
1528 MARK_FREE(&thrd->req[0]);
1529 MARK_FREE(&thrd->req[1]);
1532 case PL330_OP_ABORT:
1533 active = _thrd_active(thrd);
1535 /* Make sure the channel is stopped */
1538 /* ABORT is only for the active req */
1544 thrd->req[active].r = NULL;
1545 MARK_FREE(&thrd->req[active]);
1547 /* Start the next */
1548 case PL330_OP_START:
1557 spin_unlock_irqrestore(&pl330->lock, flags);
1560 EXPORT_SYMBOL(pl330_chan_ctrl);
1562 int pl330_chan_status(void *ch_id, struct pl330_chanstatus *pstatus)
1564 struct pl330_thread *thrd = ch_id;
1565 struct pl330_dmac *pl330;
1566 struct pl330_info *pi;
1571 if (!pstatus || !thrd || thrd->free)
1578 /* The client should remove the DMAC and add again */
1579 if (pl330->state == DYING)
1580 pstatus->dmac_halted = true;
1582 pstatus->dmac_halted = false;
1584 val = readl(regs + FSC);
1585 if (val & (1 << thrd->id))
1586 pstatus->faulting = true;
1588 pstatus->faulting = false;
1590 active = _thrd_active(thrd);
1593 /* Indicate that the thread is not running */
1594 pstatus->top_req = NULL;
1595 pstatus->wait_req = NULL;
1598 pstatus->top_req = thrd->req[active].r;
1599 pstatus->wait_req = !IS_FREE(&thrd->req[1 - active])
1600 ? thrd->req[1 - active].r : NULL;
1603 pstatus->src_addr = readl(regs + SA(thrd->id));
1604 pstatus->dst_addr = readl(regs + DA(thrd->id));
1608 EXPORT_SYMBOL(pl330_chan_status);
1610 /* Reserve an event */
1611 static inline int _alloc_event(struct pl330_thread *thrd)
1613 struct pl330_dmac *pl330 = thrd->dmac;
1614 struct pl330_info *pi = pl330->pinfo;
1617 for (ev = 0; ev < pi->pcfg.num_events; ev++)
1618 if (pl330->events[ev] == -1) {
1619 pl330->events[ev] = thrd->id;
1626 /* Upon success, returns IdentityToken for the
1627 * allocated channel, NULL otherwise.
1629 void *pl330_request_channel(const struct pl330_info *pi)
1631 struct pl330_thread *thrd = NULL;
1632 struct pl330_dmac *pl330;
1633 unsigned long flags;
1636 if (!pi || !pi->pl330_data)
1639 pl330 = pi->pl330_data;
1641 if (pl330->state == DYING)
1644 chans = pi->pcfg.num_chan;
1646 spin_lock_irqsave(&pl330->lock, flags);
1648 for (i = 0; i < chans; i++) {
1649 thrd = &pl330->channels[i];
1651 thrd->ev = _alloc_event(thrd);
1652 if (thrd->ev >= 0) {
1655 thrd->req[0].r = NULL;
1656 MARK_FREE(&thrd->req[0]);
1657 thrd->req[1].r = NULL;
1658 MARK_FREE(&thrd->req[1]);
1665 spin_unlock_irqrestore(&pl330->lock, flags);
1669 EXPORT_SYMBOL(pl330_request_channel);
1671 /* Release an event */
1672 static inline void _free_event(struct pl330_thread *thrd, int ev)
1674 struct pl330_dmac *pl330 = thrd->dmac;
1675 struct pl330_info *pi = pl330->pinfo;
1677 /* If the event is valid and was held by the thread */
1678 if (ev >= 0 && ev < pi->pcfg.num_events
1679 && pl330->events[ev] == thrd->id)
1680 pl330->events[ev] = -1;
1683 void pl330_release_channel(void *ch_id)
1685 struct pl330_thread *thrd = ch_id;
1686 struct pl330_dmac *pl330;
1687 unsigned long flags;
1689 if (!thrd || thrd->free)
1694 _callback(thrd->req[1 - thrd->lstenq].r, PL330_ERR_ABORT);
1695 _callback(thrd->req[thrd->lstenq].r, PL330_ERR_ABORT);
1699 spin_lock_irqsave(&pl330->lock, flags);
1700 _free_event(thrd, thrd->ev);
1702 spin_unlock_irqrestore(&pl330->lock, flags);
1704 EXPORT_SYMBOL(pl330_release_channel);
1706 /* Initialize the structure for PL330 configuration, that can be used
1707 * by the client driver the make best use of the DMAC
1709 static void read_dmac_config(struct pl330_info *pi)
1711 void __iomem *regs = pi->base;
1714 val = readl(regs + CRD) >> CRD_DATA_WIDTH_SHIFT;
1715 val &= CRD_DATA_WIDTH_MASK;
1716 pi->pcfg.data_bus_width = 8 * (1 << val);
1718 val = readl(regs + CRD) >> CRD_DATA_BUFF_SHIFT;
1719 val &= CRD_DATA_BUFF_MASK;
1720 pi->pcfg.data_buf_dep = val + 1;
1722 val = readl(regs + CR0) >> CR0_NUM_CHANS_SHIFT;
1723 val &= CR0_NUM_CHANS_MASK;
1725 pi->pcfg.num_chan = val;
1727 val = readl(regs + CR0);
1728 if (val & CR0_PERIPH_REQ_SET) {
1729 val = (val >> CR0_NUM_PERIPH_SHIFT) & CR0_NUM_PERIPH_MASK;
1731 pi->pcfg.num_peri = val;
1732 pi->pcfg.peri_ns = readl(regs + CR4);
1734 pi->pcfg.num_peri = 0;
1737 val = readl(regs + CR0);
1738 if (val & CR0_BOOT_MAN_NS)
1739 pi->pcfg.mode |= DMAC_MODE_NS;
1741 pi->pcfg.mode &= ~DMAC_MODE_NS;
1743 val = readl(regs + CR0) >> CR0_NUM_EVENTS_SHIFT;
1744 val &= CR0_NUM_EVENTS_MASK;
1746 pi->pcfg.num_events = val;
1748 pi->pcfg.irq_ns = readl(regs + CR3);
1750 pi->pcfg.periph_id = get_id(pi, PERIPH_ID);
1751 pi->pcfg.pcell_id = get_id(pi, PCELL_ID);
1754 static inline void _reset_thread(struct pl330_thread *thrd)
1756 struct pl330_dmac *pl330 = thrd->dmac;
1757 struct pl330_info *pi = pl330->pinfo;
1759 thrd->req[0].mc_cpu = pl330->mcode_cpu
1760 + (thrd->id * pi->mcbufsz);
1761 thrd->req[0].mc_bus = pl330->mcode_bus
1762 + (thrd->id * pi->mcbufsz);
1763 thrd->req[0].r = NULL;
1764 MARK_FREE(&thrd->req[0]);
1766 thrd->req[1].mc_cpu = thrd->req[0].mc_cpu
1768 thrd->req[1].mc_bus = thrd->req[0].mc_bus
1770 thrd->req[1].r = NULL;
1771 MARK_FREE(&thrd->req[1]);
1774 static int dmac_alloc_threads(struct pl330_dmac *pl330)
1776 struct pl330_info *pi = pl330->pinfo;
1777 int chans = pi->pcfg.num_chan;
1778 struct pl330_thread *thrd;
1781 /* Allocate 1 Manager and 'chans' Channel threads */
1782 pl330->channels = kzalloc((1 + chans) * sizeof(*thrd),
1784 if (!pl330->channels)
1787 /* Init Channel threads */
1788 for (i = 0; i < chans; i++) {
1789 thrd = &pl330->channels[i];
1792 _reset_thread(thrd);
1796 /* MANAGER is indexed at the end */
1797 thrd = &pl330->channels[chans];
1801 pl330->manager = thrd;
1806 static int dmac_alloc_resources(struct pl330_dmac *pl330)
1808 struct pl330_info *pi = pl330->pinfo;
1809 int chans = pi->pcfg.num_chan;
1813 * Alloc MicroCode buffer for 'chans' Channel threads.
1814 * A channel's buffer offset is (Channel_Id * MCODE_BUFF_PERCHAN)
1816 pl330->mcode_cpu = dma_alloc_coherent(pi->dev,
1817 chans * pi->mcbufsz,
1818 &pl330->mcode_bus, GFP_KERNEL);
1819 if (!pl330->mcode_cpu) {
1820 dev_err(pi->dev, "%s:%d Can't allocate memory!\n",
1821 __func__, __LINE__);
1825 ret = dmac_alloc_threads(pl330);
1827 dev_err(pi->dev, "%s:%d Can't to create channels for DMAC!\n",
1828 __func__, __LINE__);
1829 dma_free_coherent(pi->dev,
1830 chans * pi->mcbufsz,
1831 pl330->mcode_cpu, pl330->mcode_bus);
1838 int pl330_add(struct pl330_info *pi)
1840 struct pl330_dmac *pl330;
1844 if (!pi || !pi->dev)
1847 /* If already added */
1852 * If the SoC can perform reset on the DMAC, then do it
1853 * before reading its configuration.
1860 /* Check if we can handle this DMAC */
1861 if ((get_id(pi, PERIPH_ID) & 0xfffff) != PERIPH_ID_VAL
1862 || get_id(pi, PCELL_ID) != PCELL_ID_VAL) {
1863 dev_err(pi->dev, "PERIPH_ID 0x%x, PCELL_ID 0x%x !\n",
1864 get_id(pi, PERIPH_ID), get_id(pi, PCELL_ID));
1868 /* Read the configuration of the DMAC */
1869 read_dmac_config(pi);
1871 if (pi->pcfg.num_events == 0) {
1872 dev_err(pi->dev, "%s:%d Can't work without events!\n",
1873 __func__, __LINE__);
1877 pl330 = kzalloc(sizeof(*pl330), GFP_KERNEL);
1879 dev_err(pi->dev, "%s:%d Can't allocate memory!\n",
1880 __func__, __LINE__);
1884 /* Assign the info structure and private data */
1886 pi->pl330_data = pl330;
1888 spin_lock_init(&pl330->lock);
1890 INIT_LIST_HEAD(&pl330->req_done);
1892 /* Use default MC buffer size if not provided */
1894 pi->mcbufsz = MCODE_BUFF_PER_REQ * 2;
1896 /* Mark all events as free */
1897 for (i = 0; i < pi->pcfg.num_events; i++)
1898 pl330->events[i] = -1;
1900 /* Allocate resources needed by the DMAC */
1901 ret = dmac_alloc_resources(pl330);
1903 dev_err(pi->dev, "Unable to create channels for DMAC\n");
1908 tasklet_init(&pl330->tasks, pl330_dotask, (unsigned long) pl330);
1910 pl330->state = INIT;
1914 EXPORT_SYMBOL(pl330_add);
1916 static int dmac_free_threads(struct pl330_dmac *pl330)
1918 struct pl330_info *pi = pl330->pinfo;
1919 int chans = pi->pcfg.num_chan;
1920 struct pl330_thread *thrd;
1923 /* Release Channel threads */
1924 for (i = 0; i < chans; i++) {
1925 thrd = &pl330->channels[i];
1926 pl330_release_channel((void *)thrd);
1930 kfree(pl330->channels);
1935 static void dmac_free_resources(struct pl330_dmac *pl330)
1937 struct pl330_info *pi = pl330->pinfo;
1938 int chans = pi->pcfg.num_chan;
1940 dmac_free_threads(pl330);
1942 dma_free_coherent(pi->dev, chans * pi->mcbufsz,
1943 pl330->mcode_cpu, pl330->mcode_bus);
1946 void pl330_del(struct pl330_info *pi)
1948 struct pl330_dmac *pl330;
1950 if (!pi || !pi->pl330_data)
1953 pl330 = pi->pl330_data;
1955 pl330->state = UNINIT;
1957 tasklet_kill(&pl330->tasks);
1959 /* Free DMAC resources */
1960 dmac_free_resources(pl330);
1963 pi->pl330_data = NULL;
1965 EXPORT_SYMBOL(pl330_del);