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 /* DMA address of MicroCode buffer */
329 /* List of all Channel threads */
330 struct pl330_thread *channels;
331 /* Pointer to the MANAGER thread */
332 struct pl330_thread *manager;
333 /* To handle bad news in interrupt */
334 struct tasklet_struct tasks;
335 struct _pl330_tbd dmac_tbd;
336 /* State of DMAC operation */
337 enum pl330_dmac_state state;
340 static inline void _callback(struct pl330_req *r, enum pl330_op_err err)
343 r->xfer_cb(r->token, err);
346 static inline bool _queue_empty(struct pl330_thread *thrd)
348 return (IS_FREE(&thrd->req[0]) && IS_FREE(&thrd->req[1]))
352 static inline bool _queue_full(struct pl330_thread *thrd)
354 return (IS_FREE(&thrd->req[0]) || IS_FREE(&thrd->req[1]))
358 static inline bool is_manager(struct pl330_thread *thrd)
360 struct pl330_dmac *pl330 = thrd->dmac;
362 /* MANAGER is indexed at the end */
363 if (thrd->id == pl330->pinfo->pcfg.num_chan)
369 /* If manager of the thread is in Non-Secure mode */
370 static inline bool _manager_ns(struct pl330_thread *thrd)
372 struct pl330_dmac *pl330 = thrd->dmac;
374 return (pl330->pinfo->pcfg.mode & DMAC_MODE_NS) ? true : false;
377 static inline u32 get_id(struct pl330_info *pi, u32 off)
379 void __iomem *regs = pi->base;
382 id |= (readb(regs + off + 0x0) << 0);
383 id |= (readb(regs + off + 0x4) << 8);
384 id |= (readb(regs + off + 0x8) << 16);
385 id |= (readb(regs + off + 0xc) << 24);
390 static inline u32 _emit_ADDH(unsigned dry_run, u8 buf[],
391 enum pl330_dst da, u16 val)
396 buf[0] = CMD_DMAADDH;
398 *((u16 *)&buf[1]) = val;
400 PL330_DBGCMD_DUMP(SZ_DMAADDH, "\tDMAADDH %s %u\n",
401 da == 1 ? "DA" : "SA", val);
406 static inline u32 _emit_END(unsigned dry_run, u8 buf[])
413 PL330_DBGCMD_DUMP(SZ_DMAEND, "\tDMAEND\n");
418 static inline u32 _emit_FLUSHP(unsigned dry_run, u8 buf[], u8 peri)
423 buf[0] = CMD_DMAFLUSHP;
429 PL330_DBGCMD_DUMP(SZ_DMAFLUSHP, "\tDMAFLUSHP %u\n", peri >> 3);
434 static inline u32 _emit_LD(unsigned dry_run, u8 buf[], enum pl330_cond cond)
442 buf[0] |= (0 << 1) | (1 << 0);
443 else if (cond == BURST)
444 buf[0] |= (1 << 1) | (1 << 0);
446 PL330_DBGCMD_DUMP(SZ_DMALD, "\tDMALD%c\n",
447 cond == SINGLE ? 'S' : (cond == BURST ? 'B' : 'A'));
452 static inline u32 _emit_LDP(unsigned dry_run, u8 buf[],
453 enum pl330_cond cond, u8 peri)
467 PL330_DBGCMD_DUMP(SZ_DMALDP, "\tDMALDP%c %u\n",
468 cond == SINGLE ? 'S' : 'B', peri >> 3);
473 static inline u32 _emit_LP(unsigned dry_run, u8 buf[],
474 unsigned loop, u8 cnt)
484 cnt--; /* DMAC increments by 1 internally */
487 PL330_DBGCMD_DUMP(SZ_DMALP, "\tDMALP_%c %u\n", loop ? '1' : '0', cnt);
493 enum pl330_cond cond;
499 static inline u32 _emit_LPEND(unsigned dry_run, u8 buf[],
500 const struct _arg_LPEND *arg)
502 enum pl330_cond cond = arg->cond;
503 bool forever = arg->forever;
504 unsigned loop = arg->loop;
505 u8 bjump = arg->bjump;
510 buf[0] = CMD_DMALPEND;
519 buf[0] |= (0 << 1) | (1 << 0);
520 else if (cond == BURST)
521 buf[0] |= (1 << 1) | (1 << 0);
525 PL330_DBGCMD_DUMP(SZ_DMALPEND, "\tDMALP%s%c_%c bjmpto_%x\n",
526 forever ? "FE" : "END",
527 cond == SINGLE ? 'S' : (cond == BURST ? 'B' : 'A'),
534 static inline u32 _emit_KILL(unsigned dry_run, u8 buf[])
539 buf[0] = CMD_DMAKILL;
544 static inline u32 _emit_MOV(unsigned dry_run, u8 buf[],
545 enum dmamov_dst dst, u32 val)
552 *((u32 *)&buf[2]) = val;
554 PL330_DBGCMD_DUMP(SZ_DMAMOV, "\tDMAMOV %s 0x%x\n",
555 dst == SAR ? "SAR" : (dst == DAR ? "DAR" : "CCR"), val);
560 static inline u32 _emit_NOP(unsigned dry_run, u8 buf[])
567 PL330_DBGCMD_DUMP(SZ_DMANOP, "\tDMANOP\n");
572 static inline u32 _emit_RMB(unsigned dry_run, u8 buf[])
579 PL330_DBGCMD_DUMP(SZ_DMARMB, "\tDMARMB\n");
584 static inline u32 _emit_SEV(unsigned dry_run, u8 buf[], u8 ev)
595 PL330_DBGCMD_DUMP(SZ_DMASEV, "\tDMASEV %u\n", ev >> 3);
600 static inline u32 _emit_ST(unsigned dry_run, u8 buf[], enum pl330_cond cond)
608 buf[0] |= (0 << 1) | (1 << 0);
609 else if (cond == BURST)
610 buf[0] |= (1 << 1) | (1 << 0);
612 PL330_DBGCMD_DUMP(SZ_DMAST, "\tDMAST%c\n",
613 cond == SINGLE ? 'S' : (cond == BURST ? 'B' : 'A'));
618 static inline u32 _emit_STP(unsigned dry_run, u8 buf[],
619 enum pl330_cond cond, u8 peri)
633 PL330_DBGCMD_DUMP(SZ_DMASTP, "\tDMASTP%c %u\n",
634 cond == SINGLE ? 'S' : 'B', peri >> 3);
639 static inline u32 _emit_STZ(unsigned dry_run, u8 buf[])
646 PL330_DBGCMD_DUMP(SZ_DMASTZ, "\tDMASTZ\n");
651 static inline u32 _emit_WFE(unsigned dry_run, u8 buf[], u8 ev,
666 PL330_DBGCMD_DUMP(SZ_DMAWFE, "\tDMAWFE %u%s\n",
667 ev >> 3, invalidate ? ", I" : "");
672 static inline u32 _emit_WFP(unsigned dry_run, u8 buf[],
673 enum pl330_cond cond, u8 peri)
681 buf[0] |= (0 << 1) | (0 << 0);
682 else if (cond == BURST)
683 buf[0] |= (1 << 1) | (0 << 0);
685 buf[0] |= (0 << 1) | (1 << 0);
691 PL330_DBGCMD_DUMP(SZ_DMAWFP, "\tDMAWFP%c %u\n",
692 cond == SINGLE ? 'S' : (cond == BURST ? 'B' : 'P'), peri >> 3);
697 static inline u32 _emit_WMB(unsigned dry_run, u8 buf[])
704 PL330_DBGCMD_DUMP(SZ_DMAWMB, "\tDMAWMB\n");
715 static inline u32 _emit_GO(unsigned dry_run, u8 buf[],
716 const struct _arg_GO *arg)
719 u32 addr = arg->addr;
720 unsigned ns = arg->ns;
730 *((u32 *)&buf[2]) = addr;
735 #define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t)
737 /* Returns Time-Out */
738 static bool _until_dmac_idle(struct pl330_thread *thrd)
740 void __iomem *regs = thrd->dmac->pinfo->base;
741 unsigned long loops = msecs_to_loops(5);
744 /* Until Manager is Idle */
745 if (!(readl(regs + DBGSTATUS) & DBG_BUSY))
757 static inline void _execute_DBGINSN(struct pl330_thread *thrd,
758 u8 insn[], bool as_manager)
760 void __iomem *regs = thrd->dmac->pinfo->base;
763 val = (insn[0] << 16) | (insn[1] << 24);
766 val |= (thrd->id << 8); /* Channel Number */
768 writel(val, regs + DBGINST0);
770 val = *((u32 *)&insn[2]);
771 writel(val, regs + DBGINST1);
773 /* If timed out due to halted state-machine */
774 if (_until_dmac_idle(thrd)) {
775 dev_err(thrd->dmac->pinfo->dev, "DMAC halted!\n");
780 writel(0, regs + DBGCMD);
783 static inline u32 _state(struct pl330_thread *thrd)
785 void __iomem *regs = thrd->dmac->pinfo->base;
788 if (is_manager(thrd))
789 val = readl(regs + DS) & 0xf;
791 val = readl(regs + CS(thrd->id)) & 0xf;
795 return PL330_STATE_STOPPED;
797 return PL330_STATE_EXECUTING;
799 return PL330_STATE_CACHEMISS;
801 return PL330_STATE_UPDTPC;
803 return PL330_STATE_WFE;
805 return PL330_STATE_FAULTING;
807 if (is_manager(thrd))
808 return PL330_STATE_INVALID;
810 return PL330_STATE_ATBARRIER;
812 if (is_manager(thrd))
813 return PL330_STATE_INVALID;
815 return PL330_STATE_QUEUEBUSY;
817 if (is_manager(thrd))
818 return PL330_STATE_INVALID;
820 return PL330_STATE_WFP;
822 if (is_manager(thrd))
823 return PL330_STATE_INVALID;
825 return PL330_STATE_KILLING;
827 if (is_manager(thrd))
828 return PL330_STATE_INVALID;
830 return PL330_STATE_COMPLETING;
832 if (is_manager(thrd))
833 return PL330_STATE_INVALID;
835 return PL330_STATE_FAULT_COMPLETING;
837 return PL330_STATE_INVALID;
841 /* If the request 'req' of thread 'thrd' is currently active */
842 static inline bool _req_active(struct pl330_thread *thrd,
843 struct _pl330_req *req)
845 void __iomem *regs = thrd->dmac->pinfo->base;
846 u32 buf = req->mc_bus, pc = readl(regs + CPC(thrd->id));
851 return (pc >= buf && pc <= buf + req->mc_len) ? true : false;
854 /* Returns 0 if the thread is inactive, ID of active req + 1 otherwise */
855 static inline unsigned _thrd_active(struct pl330_thread *thrd)
857 if (_req_active(thrd, &thrd->req[0]))
858 return 1; /* First req active */
860 if (_req_active(thrd, &thrd->req[1]))
861 return 2; /* Second req active */
866 static void _stop(struct pl330_thread *thrd)
868 void __iomem *regs = thrd->dmac->pinfo->base;
869 u8 insn[6] = {0, 0, 0, 0, 0, 0};
871 if (_state(thrd) == PL330_STATE_FAULT_COMPLETING)
872 UNTIL(thrd, PL330_STATE_FAULTING | PL330_STATE_KILLING);
874 /* Return if nothing needs to be done */
875 if (_state(thrd) == PL330_STATE_COMPLETING
876 || _state(thrd) == PL330_STATE_KILLING
877 || _state(thrd) == PL330_STATE_STOPPED)
882 /* Stop generating interrupts for SEV */
883 writel(readl(regs + INTEN) & ~(1 << thrd->ev), regs + INTEN);
885 _execute_DBGINSN(thrd, insn, is_manager(thrd));
888 /* Start doing req 'idx' of thread 'thrd' */
889 static bool _trigger(struct pl330_thread *thrd)
891 void __iomem *regs = thrd->dmac->pinfo->base;
892 struct _pl330_req *req;
896 u8 insn[6] = {0, 0, 0, 0, 0, 0};
898 /* Return if already ACTIVE */
899 if (_state(thrd) != PL330_STATE_STOPPED)
902 if (!IS_FREE(&thrd->req[1 - thrd->lstenq]))
903 req = &thrd->req[1 - thrd->lstenq];
904 else if (!IS_FREE(&thrd->req[thrd->lstenq]))
905 req = &thrd->req[thrd->lstenq];
909 /* Return if no request */
916 ns = r->cfg->nonsecure ? 1 : 0;
917 else if (readl(regs + CS(thrd->id)) & CS_CNS)
922 /* See 'Abort Sources' point-4 at Page 2-25 */
923 if (_manager_ns(thrd) && !ns)
924 dev_info(thrd->dmac->pinfo->dev, "%s:%d Recipe for ABORT!\n",
928 go.addr = req->mc_bus;
930 _emit_GO(0, insn, &go);
932 /* Set to generate interrupts for SEV */
933 writel(readl(regs + INTEN) | (1 << thrd->ev), regs + INTEN);
935 /* Only manager can execute GO */
936 _execute_DBGINSN(thrd, insn, true);
941 static bool _start(struct pl330_thread *thrd)
943 switch (_state(thrd)) {
944 case PL330_STATE_FAULT_COMPLETING:
945 UNTIL(thrd, PL330_STATE_FAULTING | PL330_STATE_KILLING);
947 if (_state(thrd) == PL330_STATE_KILLING)
948 UNTIL(thrd, PL330_STATE_STOPPED)
950 case PL330_STATE_FAULTING:
953 case PL330_STATE_KILLING:
954 case PL330_STATE_COMPLETING:
955 UNTIL(thrd, PL330_STATE_STOPPED)
957 case PL330_STATE_STOPPED:
958 return _trigger(thrd);
960 case PL330_STATE_WFP:
961 case PL330_STATE_QUEUEBUSY:
962 case PL330_STATE_ATBARRIER:
963 case PL330_STATE_UPDTPC:
964 case PL330_STATE_CACHEMISS:
965 case PL330_STATE_EXECUTING:
968 case PL330_STATE_WFE: /* For RESUME, nothing yet */
974 static inline int _ldst_memtomem(unsigned dry_run, u8 buf[],
975 const struct _xfer_spec *pxs, int cyc)
980 off += _emit_LD(dry_run, &buf[off], ALWAYS);
981 off += _emit_RMB(dry_run, &buf[off]);
982 off += _emit_ST(dry_run, &buf[off], ALWAYS);
983 off += _emit_WMB(dry_run, &buf[off]);
989 static inline int _ldst_devtomem(unsigned dry_run, u8 buf[],
990 const struct _xfer_spec *pxs, int cyc)
995 off += _emit_WFP(dry_run, &buf[off], SINGLE, pxs->r->peri);
996 off += _emit_LDP(dry_run, &buf[off], SINGLE, pxs->r->peri);
997 off += _emit_ST(dry_run, &buf[off], ALWAYS);
998 off += _emit_FLUSHP(dry_run, &buf[off], pxs->r->peri);
1004 static inline int _ldst_memtodev(unsigned dry_run, u8 buf[],
1005 const struct _xfer_spec *pxs, int cyc)
1010 off += _emit_WFP(dry_run, &buf[off], SINGLE, pxs->r->peri);
1011 off += _emit_LD(dry_run, &buf[off], ALWAYS);
1012 off += _emit_STP(dry_run, &buf[off], SINGLE, pxs->r->peri);
1013 off += _emit_FLUSHP(dry_run, &buf[off], pxs->r->peri);
1019 static int _bursts(unsigned dry_run, u8 buf[],
1020 const struct _xfer_spec *pxs, int cyc)
1024 switch (pxs->r->rqtype) {
1026 off += _ldst_memtodev(dry_run, &buf[off], pxs, cyc);
1029 off += _ldst_devtomem(dry_run, &buf[off], pxs, cyc);
1032 off += _ldst_memtomem(dry_run, &buf[off], pxs, cyc);
1035 off += 0x40000000; /* Scare off the Client */
1042 /* Returns bytes consumed and updates bursts */
1043 static inline int _loop(unsigned dry_run, u8 buf[],
1044 unsigned long *bursts, const struct _xfer_spec *pxs)
1046 int cyc, cycmax, szlp, szlpend, szbrst, off;
1047 unsigned lcnt0, lcnt1, ljmp0, ljmp1;
1048 struct _arg_LPEND lpend;
1050 /* Max iterations possibile in DMALP is 256 */
1051 if (*bursts >= 256*256) {
1054 cyc = *bursts / lcnt1 / lcnt0;
1055 } else if (*bursts > 256) {
1057 lcnt0 = *bursts / lcnt1;
1065 szlp = _emit_LP(1, buf, 0, 0);
1066 szbrst = _bursts(1, buf, pxs, 1);
1068 lpend.cond = ALWAYS;
1069 lpend.forever = false;
1072 szlpend = _emit_LPEND(1, buf, &lpend);
1080 * Max bursts that we can unroll due to limit on the
1081 * size of backward jump that can be encoded in DMALPEND
1082 * which is 8-bits and hence 255
1084 cycmax = (255 - (szlp + szlpend)) / szbrst;
1086 cyc = (cycmax < cyc) ? cycmax : cyc;
1091 off += _emit_LP(dry_run, &buf[off], 0, lcnt0);
1095 off += _emit_LP(dry_run, &buf[off], 1, lcnt1);
1098 off += _bursts(dry_run, &buf[off], pxs, cyc);
1100 lpend.cond = ALWAYS;
1101 lpend.forever = false;
1103 lpend.bjump = off - ljmp1;
1104 off += _emit_LPEND(dry_run, &buf[off], &lpend);
1107 lpend.cond = ALWAYS;
1108 lpend.forever = false;
1110 lpend.bjump = off - ljmp0;
1111 off += _emit_LPEND(dry_run, &buf[off], &lpend);
1114 *bursts = lcnt1 * cyc;
1121 /* Returns bytes consumed and updates bursts */
1122 static inline int _loop_infiniteloop(unsigned dry_run, u8 buf[],
1123 unsigned long bursts, const struct _xfer_spec *pxs, int ev)
1126 unsigned lcnt0, lcnt1, ljmp0, ljmp1, ljmpfe;
1127 struct _arg_LPEND lpend;
1131 lcnt0 = pxs->r->infiniteloop;
1136 off += _emit_MOV(dry_run, &buf[off], SAR, pxs->x->src_addr);
1137 off += _emit_MOV(dry_run, &buf[off], DAR, pxs->x->dst_addr);
1140 off += _emit_LP(dry_run, &buf[off], 0, lcnt0);
1144 off += _emit_LP(dry_run, &buf[off], 1, lcnt1);
1146 off += _bursts(dry_run, &buf[off], pxs, cyc);
1147 lpend.cond = ALWAYS;
1148 lpend.forever = false;
1150 lpend.bjump = off - ljmp1;
1151 off += _emit_LPEND(dry_run, &buf[off], &lpend);
1152 off += _emit_SEV(dry_run, &buf[off], ev);
1154 lpend.cond = ALWAYS;
1155 lpend.forever = false;
1157 lpend.bjump = off - ljmp0;
1158 off += _emit_LPEND(dry_run, &buf[off], &lpend);
1160 lpend.cond = ALWAYS;
1161 lpend.forever = true;
1163 lpend.bjump = off - ljmpfe;
1164 off += _emit_LPEND(dry_run, &buf[off], &lpend);
1169 static inline int _setup_loops(unsigned dry_run, u8 buf[],
1170 const struct _xfer_spec *pxs)
1172 struct pl330_xfer *x = pxs->x;
1174 unsigned long c, bursts = BYTE_TO_BURST(x->bytes, ccr);
1179 off += _loop(dry_run, &buf[off], &c, pxs);
1186 static inline int _setup_xfer(unsigned dry_run, u8 buf[],
1187 const struct _xfer_spec *pxs)
1189 struct pl330_xfer *x = pxs->x;
1192 /* DMAMOV SAR, x->src_addr */
1193 off += _emit_MOV(dry_run, &buf[off], SAR, x->src_addr);
1194 /* DMAMOV DAR, x->dst_addr */
1195 off += _emit_MOV(dry_run, &buf[off], DAR, x->dst_addr);
1198 off += _setup_loops(dry_run, &buf[off], pxs);
1203 static inline int _setup_xfer_infiniteloop(unsigned dry_run, u8 buf[],
1204 const struct _xfer_spec *pxs, int ev)
1206 struct pl330_xfer *x = pxs->x;
1208 unsigned long bursts = BYTE_TO_BURST(x->bytes, ccr);
1212 off += _loop_infiniteloop(dry_run, &buf[off], bursts, pxs, ev);
1218 * A req is a sequence of one or more xfer units.
1219 * Returns the number of bytes taken to setup the MC for the req.
1221 static int _setup_req(unsigned dry_run, struct pl330_thread *thrd,
1222 unsigned index, struct _xfer_spec *pxs)
1224 struct _pl330_req *req = &thrd->req[index];
1225 struct pl330_xfer *x;
1226 u8 *buf = req->mc_cpu;
1229 PL330_DBGMC_START(req->mc_bus);
1231 /* DMAMOV CCR, ccr */
1232 off += _emit_MOV(dry_run, &buf[off], CCR, pxs->ccr);
1236 if (!pxs->r->infiniteloop) {
1238 /* Error if xfer length is not aligned at burst size */
1239 if (x->bytes % (BRST_SIZE(pxs->ccr)
1240 * BRST_LEN(pxs->ccr)))
1244 off += _setup_xfer(dry_run, &buf[off], pxs);
1249 /* DMASEV peripheral/event */
1250 off += _emit_SEV(dry_run, &buf[off], thrd->ev);
1252 off += _emit_END(dry_run, &buf[off]);
1254 /* Error if xfer length is not aligned at burst size */
1255 if (x->bytes % (BRST_SIZE(pxs->ccr) * BRST_LEN(pxs->ccr)))
1259 off += _setup_xfer_infiniteloop
1260 (dry_run, &buf[off], pxs, thrd->ev);
1265 static inline u32 _prepare_ccr(const struct pl330_reqcfg *rqc)
1275 /* We set same protection levels for Src and DST for now */
1276 if (rqc->privileged)
1277 ccr |= CC_SRCPRI | CC_DSTPRI;
1279 ccr |= CC_SRCNS | CC_DSTNS;
1280 if (rqc->insnaccess)
1281 ccr |= CC_SRCIA | CC_DSTIA;
1283 ccr |= (((rqc->brst_len - 1) & 0xf) << CC_SRCBRSTLEN_SHFT);
1284 ccr |= (((rqc->brst_len - 1) & 0xf) << CC_DSTBRSTLEN_SHFT);
1286 ccr |= (rqc->brst_size << CC_SRCBRSTSIZE_SHFT);
1287 ccr |= (rqc->brst_size << CC_DSTBRSTSIZE_SHFT);
1289 ccr |= (rqc->dcctl << CC_SRCCCTRL_SHFT);
1290 ccr |= (rqc->scctl << CC_DSTCCTRL_SHFT);
1292 ccr |= (rqc->swap << CC_SWAP_SHFT);
1297 static inline bool _is_valid(u32 ccr)
1299 enum pl330_dstcachectrl dcctl;
1300 enum pl330_srccachectrl scctl;
1302 dcctl = (ccr >> CC_DSTCCTRL_SHFT) & CC_DRCCCTRL_MASK;
1303 scctl = (ccr >> CC_SRCCCTRL_SHFT) & CC_SRCCCTRL_MASK;
1305 if (dcctl == DINVALID1 || dcctl == DINVALID2
1306 || scctl == SINVALID1 || scctl == SINVALID2)
1313 * Submit a list of xfers after which the client wants notification.
1314 * Client is not notified after each xfer unit, just once after all
1315 * xfer units are done or some error occurs.
1317 int pl330_submit_req(void *ch_id, struct pl330_req *r)
1319 struct pl330_thread *thrd = ch_id;
1320 struct pl330_dmac *pl330;
1321 struct pl330_info *pi;
1322 struct _xfer_spec xs;
1323 unsigned long flags;
1329 /* No Req or Unacquired Channel or DMAC */
1330 if (!r || !thrd || thrd->free)
1337 if (pl330->state == DYING
1338 || pl330->dmac_tbd.reset_chan & (1 << thrd->id)) {
1339 dev_info(thrd->dmac->pinfo->dev, "%s:%d\n",
1340 __func__, __LINE__);
1344 /* If request for non-existing peripheral */
1345 if (r->rqtype != MEMTOMEM && r->peri >= pi->pcfg.num_peri) {
1346 dev_info(thrd->dmac->pinfo->dev,
1347 "%s:%d Invalid peripheral(%u)!\n",
1348 __func__, __LINE__, r->peri);
1352 spin_lock_irqsave(&pl330->lock, flags);
1354 if (_queue_full(thrd)) {
1359 /* Use last settings, if not provided */
1361 /* Prefer Secure Channel */
1362 if (!_manager_ns(thrd))
1363 r->cfg->nonsecure = 0;
1365 r->cfg->nonsecure = 1;
1366 ccr = _prepare_ccr(r->cfg);
1368 ccr = readl(regs + CC(thrd->id));
1371 /* If this req doesn't have valid xfer settings */
1372 if (!_is_valid(ccr)) {
1374 dev_info(thrd->dmac->pinfo->dev, "%s:%d Invalid CCR(%x)!\n",
1375 __func__, __LINE__, ccr);
1379 idx = IS_FREE(&thrd->req[0]) ? 0 : 1;
1384 /* First dry run to check if req is acceptable */
1385 ret = _setup_req(1, thrd, idx, &xs);
1389 if (ret > pi->mcbufsz / 2) {
1390 dev_info(thrd->dmac->pinfo->dev,
1391 "%s:%d Trying increasing mcbufsz\n",
1392 __func__, __LINE__);
1397 /* Hook the request */
1399 thrd->req[idx].mc_len = _setup_req(0, thrd, idx, &xs);
1400 thrd->req[idx].r = r;
1405 spin_unlock_irqrestore(&pl330->lock, flags);
1409 EXPORT_SYMBOL(pl330_submit_req);
1411 static void pl330_dotask(unsigned long data)
1413 struct pl330_dmac *pl330 = (struct pl330_dmac *) data;
1414 struct pl330_info *pi = pl330->pinfo;
1415 unsigned long flags;
1418 spin_lock_irqsave(&pl330->lock, flags);
1420 /* The DMAC itself gone nuts */
1421 if (pl330->dmac_tbd.reset_dmac) {
1422 pl330->state = DYING;
1423 /* Reset the manager too */
1424 pl330->dmac_tbd.reset_mngr = true;
1425 /* Clear the reset flag */
1426 pl330->dmac_tbd.reset_dmac = false;
1429 if (pl330->dmac_tbd.reset_mngr) {
1430 _stop(pl330->manager);
1431 /* Reset all channels */
1432 pl330->dmac_tbd.reset_chan = (1 << pi->pcfg.num_chan) - 1;
1433 /* Clear the reset flag */
1434 pl330->dmac_tbd.reset_mngr = false;
1437 for (i = 0; i < pi->pcfg.num_chan; i++) {
1439 if (pl330->dmac_tbd.reset_chan & (1 << i)) {
1440 struct pl330_thread *thrd = &pl330->channels[i];
1441 void __iomem *regs = pi->base;
1442 enum pl330_op_err err;
1446 if (readl(regs + FSC) & (1 << thrd->id))
1447 err = PL330_ERR_FAIL;
1449 err = PL330_ERR_ABORT;
1451 spin_unlock_irqrestore(&pl330->lock, flags);
1453 _callback(thrd->req[1 - thrd->lstenq].r, err);
1454 _callback(thrd->req[thrd->lstenq].r, err);
1456 spin_lock_irqsave(&pl330->lock, flags);
1458 thrd->req[0].r = NULL;
1459 thrd->req[1].r = NULL;
1460 MARK_FREE(&thrd->req[0]);
1461 MARK_FREE(&thrd->req[1]);
1463 /* Clear the reset flag */
1464 pl330->dmac_tbd.reset_chan &= ~(1 << i);
1468 spin_unlock_irqrestore(&pl330->lock, flags);
1473 /* Returns 1 if state was updated, 0 otherwise */
1474 int pl330_update(const struct pl330_info *pi)
1476 struct _pl330_req *rqdone;
1477 struct pl330_dmac *pl330;
1478 unsigned long flags;
1481 int id, ev, ret = 0;
1483 if (!pi || !pi->pl330_data)
1487 pl330 = pi->pl330_data;
1489 spin_lock_irqsave(&pl330->lock, flags);
1491 val = readl(regs + FSM) & 0x1;
1493 pl330->dmac_tbd.reset_mngr = true;
1495 pl330->dmac_tbd.reset_mngr = false;
1497 val = readl(regs + FSC) & ((1 << pi->pcfg.num_chan) - 1);
1498 pl330->dmac_tbd.reset_chan |= val;
1501 while (i < pi->pcfg.num_chan) {
1502 if (val & (1 << i)) {
1504 "Reset Channel-%d\t CS-%x FTC-%x\n",
1505 i, readl(regs + CS(i)),
1506 readl(regs + FTC(i)));
1507 _stop(&pl330->channels[i]);
1513 /* Check which event happened i.e, thread notified */
1514 val = readl(regs + ES);
1515 if (pi->pcfg.num_events < 32
1516 && val & ~((1 << pi->pcfg.num_events) - 1)) {
1517 pl330->dmac_tbd.reset_dmac = true;
1518 dev_err(pi->dev, "%s:%d Unexpected!\n", __func__, __LINE__);
1523 for (ev = 0; ev < pi->pcfg.num_events; ev++) {
1524 if (val & (1 << ev)) { /* Event occured */
1525 struct pl330_thread *thrd;
1526 u32 inten = readl(regs + INTEN);
1529 /* Clear the event */
1530 if (inten & (1 << ev))
1531 writel(1 << ev, regs + INTCLR);
1535 id = pl330->events[ev];
1539 thrd = &pl330->channels[id];
1541 active = _thrd_active(thrd);
1542 if (!active) /* Aborted */
1547 rqdone = &thrd->req[active];
1549 if (!rqdone->r->infiniteloop) {
1552 /* Get going again ASAP */
1556 /* For now, just make a list of callbacks to be done */
1557 list_add_tail(&rqdone->rqd, &pl330->req_done);
1561 /* Now that we are in no hurry, do the callbacks */
1562 while (!list_empty(&pl330->req_done)) {
1563 rqdone = container_of(pl330->req_done.next,
1564 struct _pl330_req, rqd);
1566 list_del_init(&rqdone->rqd);
1568 spin_unlock_irqrestore(&pl330->lock, flags);
1569 _callback(rqdone->r, PL330_ERR_NONE);
1570 spin_lock_irqsave(&pl330->lock, flags);
1574 spin_unlock_irqrestore(&pl330->lock, flags);
1576 if (pl330->dmac_tbd.reset_dmac
1577 || pl330->dmac_tbd.reset_mngr
1578 || pl330->dmac_tbd.reset_chan) {
1580 tasklet_schedule(&pl330->tasks);
1585 EXPORT_SYMBOL(pl330_update);
1587 int pl330_chan_ctrl(void *ch_id, enum pl330_chan_op op)
1589 struct pl330_thread *thrd = ch_id;
1590 struct pl330_dmac *pl330;
1591 unsigned long flags;
1592 int ret = 0, active;
1594 if (!thrd || thrd->free || thrd->dmac->state == DYING)
1599 spin_lock_irqsave(&pl330->lock, flags);
1602 case PL330_OP_FLUSH:
1603 /* Make sure the channel is stopped */
1606 thrd->req[0].r = NULL;
1607 thrd->req[1].r = NULL;
1608 MARK_FREE(&thrd->req[0]);
1609 MARK_FREE(&thrd->req[1]);
1612 case PL330_OP_ABORT:
1613 active = _thrd_active(thrd);
1615 /* Make sure the channel is stopped */
1618 /* ABORT is only for the active req */
1624 thrd->req[active].r = NULL;
1625 MARK_FREE(&thrd->req[active]);
1627 /* Start the next */
1628 case PL330_OP_START:
1637 spin_unlock_irqrestore(&pl330->lock, flags);
1640 EXPORT_SYMBOL(pl330_chan_ctrl);
1642 int pl330_chan_status(void *ch_id, struct pl330_chanstatus *pstatus)
1644 struct pl330_thread *thrd = ch_id;
1645 struct pl330_dmac *pl330;
1646 struct pl330_info *pi;
1651 if (!pstatus || !thrd || thrd->free)
1658 /* The client should remove the DMAC and add again */
1659 if (pl330->state == DYING)
1660 pstatus->dmac_halted = true;
1662 pstatus->dmac_halted = false;
1664 val = readl(regs + FSC);
1665 if (val & (1 << thrd->id))
1666 pstatus->faulting = true;
1668 pstatus->faulting = false;
1670 active = _thrd_active(thrd);
1673 /* Indicate that the thread is not running */
1674 pstatus->top_req = NULL;
1675 pstatus->wait_req = NULL;
1678 pstatus->top_req = thrd->req[active].r;
1679 pstatus->wait_req = !IS_FREE(&thrd->req[1 - active])
1680 ? thrd->req[1 - active].r : NULL;
1683 pstatus->src_addr = readl(regs + SA(thrd->id));
1684 pstatus->dst_addr = readl(regs + DA(thrd->id));
1688 EXPORT_SYMBOL(pl330_chan_status);
1690 /* Reserve an event */
1691 static inline int _alloc_event(struct pl330_thread *thrd)
1693 struct pl330_dmac *pl330 = thrd->dmac;
1694 struct pl330_info *pi = pl330->pinfo;
1697 for (ev = 0; ev < pi->pcfg.num_events; ev++)
1698 if (pl330->events[ev] == -1) {
1699 pl330->events[ev] = thrd->id;
1706 /* Upon success, returns IdentityToken for the
1707 * allocated channel, NULL otherwise.
1709 void *pl330_request_channel(const struct pl330_info *pi)
1711 struct pl330_thread *thrd = NULL;
1712 struct pl330_dmac *pl330;
1713 unsigned long flags;
1716 if (!pi || !pi->pl330_data)
1719 pl330 = pi->pl330_data;
1721 if (pl330->state == DYING)
1724 chans = pi->pcfg.num_chan;
1726 spin_lock_irqsave(&pl330->lock, flags);
1728 for (i = 0; i < chans; i++) {
1729 thrd = &pl330->channels[i];
1731 thrd->ev = _alloc_event(thrd);
1732 if (thrd->ev >= 0) {
1735 thrd->req[0].r = NULL;
1736 MARK_FREE(&thrd->req[0]);
1737 thrd->req[1].r = NULL;
1738 MARK_FREE(&thrd->req[1]);
1745 spin_unlock_irqrestore(&pl330->lock, flags);
1749 EXPORT_SYMBOL(pl330_request_channel);
1751 /* Release an event */
1752 static inline void _free_event(struct pl330_thread *thrd, int ev)
1754 struct pl330_dmac *pl330 = thrd->dmac;
1755 struct pl330_info *pi = pl330->pinfo;
1757 /* If the event is valid and was held by the thread */
1758 if (ev >= 0 && ev < pi->pcfg.num_events
1759 && pl330->events[ev] == thrd->id)
1760 pl330->events[ev] = -1;
1763 void pl330_release_channel(void *ch_id)
1765 struct pl330_thread *thrd = ch_id;
1766 struct pl330_dmac *pl330;
1767 unsigned long flags;
1769 if (!thrd || thrd->free)
1774 _callback(thrd->req[1 - thrd->lstenq].r, PL330_ERR_ABORT);
1775 _callback(thrd->req[thrd->lstenq].r, PL330_ERR_ABORT);
1779 spin_lock_irqsave(&pl330->lock, flags);
1780 _free_event(thrd, thrd->ev);
1782 spin_unlock_irqrestore(&pl330->lock, flags);
1784 EXPORT_SYMBOL(pl330_release_channel);
1786 /* Initialize the structure for PL330 configuration, that can be used
1787 * by the client driver the make best use of the DMAC
1789 static void read_dmac_config(struct pl330_info *pi)
1791 void __iomem *regs = pi->base;
1794 val = readl(regs + CRD) >> CRD_DATA_WIDTH_SHIFT;
1795 val &= CRD_DATA_WIDTH_MASK;
1796 pi->pcfg.data_bus_width = 8 * (1 << val);
1798 val = readl(regs + CRD) >> CRD_DATA_BUFF_SHIFT;
1799 val &= CRD_DATA_BUFF_MASK;
1800 pi->pcfg.data_buf_dep = val + 1;
1802 val = readl(regs + CR0) >> CR0_NUM_CHANS_SHIFT;
1803 val &= CR0_NUM_CHANS_MASK;
1805 pi->pcfg.num_chan = val;
1807 val = readl(regs + CR0);
1808 if (val & CR0_PERIPH_REQ_SET) {
1809 val = (val >> CR0_NUM_PERIPH_SHIFT) & CR0_NUM_PERIPH_MASK;
1811 pi->pcfg.num_peri = val;
1812 pi->pcfg.peri_ns = readl(regs + CR4);
1814 pi->pcfg.num_peri = 0;
1817 val = readl(regs + CR0);
1818 if (val & CR0_BOOT_MAN_NS)
1819 pi->pcfg.mode |= DMAC_MODE_NS;
1821 pi->pcfg.mode &= ~DMAC_MODE_NS;
1823 val = readl(regs + CR0) >> CR0_NUM_EVENTS_SHIFT;
1824 val &= CR0_NUM_EVENTS_MASK;
1826 pi->pcfg.num_events = val;
1828 pi->pcfg.irq_ns = readl(regs + CR3);
1830 pi->pcfg.periph_id = get_id(pi, PERIPH_ID);
1831 pi->pcfg.pcell_id = get_id(pi, PCELL_ID);
1834 static inline void _reset_thread(struct pl330_thread *thrd)
1836 struct pl330_dmac *pl330 = thrd->dmac;
1837 struct pl330_info *pi = pl330->pinfo;
1839 thrd->req[0].mc_cpu = pl330->mcode_cpu
1840 + (thrd->id * pi->mcbufsz);
1841 thrd->req[0].mc_bus = pl330->mcode_dma
1842 + (thrd->id * pi->mcbufsz);
1843 thrd->req[0].r = NULL;
1844 MARK_FREE(&thrd->req[0]);
1846 thrd->req[1].mc_cpu = thrd->req[0].mc_cpu
1848 thrd->req[1].mc_bus = thrd->req[0].mc_bus
1850 thrd->req[1].r = NULL;
1851 MARK_FREE(&thrd->req[1]);
1854 static int dmac_alloc_threads(struct pl330_dmac *pl330)
1856 struct pl330_info *pi = pl330->pinfo;
1857 int chans = pi->pcfg.num_chan;
1858 struct pl330_thread *thrd;
1861 /* Allocate 1 Manager and 'chans' Channel threads */
1862 pl330->channels = kzalloc((1 + chans) * sizeof(*thrd),
1864 if (!pl330->channels)
1867 /* Init Channel threads */
1868 for (i = 0; i < chans; i++) {
1869 thrd = &pl330->channels[i];
1872 _reset_thread(thrd);
1876 /* MANAGER is indexed at the end */
1877 thrd = &pl330->channels[chans];
1881 pl330->manager = thrd;
1886 static int dmac_alloc_resources(struct pl330_dmac *pl330)
1888 struct pl330_info *pi = pl330->pinfo;
1889 int chans = pi->pcfg.num_chan;
1893 * Alloc MicroCode buffer for 'chans' Channel threads.
1894 * A channel's buffer offset is (Channel_Id * MCODE_BUFF_PERCHAN)
1896 pl330->mcode_cpu = dma_alloc_coherent(pi->dev,
1897 chans * pi->mcbufsz,
1898 &pl330->mcode_bus, GFP_KERNEL);
1899 if (!pl330->mcode_cpu) {
1900 dev_err(pi->dev, "%s:%d Can't allocate memory!\n",
1901 __func__, __LINE__);
1906 pl330->mcode_dma = (u32)pl330->mcode_cpu;
1908 pl330->mcode_dma = pl330->mcode_bus;
1910 ret = dmac_alloc_threads(pl330);
1912 dev_err(pi->dev, "%s:%d Can't to create channels for DMAC!\n",
1913 __func__, __LINE__);
1914 dma_free_coherent(pi->dev,
1915 chans * pi->mcbufsz,
1916 pl330->mcode_cpu, pl330->mcode_bus);
1923 int pl330_add(struct pl330_info *pi)
1925 struct pl330_dmac *pl330;
1929 if (!pi || !pi->dev)
1932 /* If already added */
1937 * If the SoC can perform reset on the DMAC, then do it
1938 * before reading its configuration.
1945 /* Check if we can handle this DMAC */
1946 if ((get_id(pi, PERIPH_ID) & 0xfffff) != PERIPH_ID_VAL
1947 || get_id(pi, PCELL_ID) != PCELL_ID_VAL) {
1948 dev_err(pi->dev, "PERIPH_ID 0x%x, PCELL_ID 0x%x !\n",
1949 get_id(pi, PERIPH_ID), get_id(pi, PCELL_ID));
1953 /* Read the configuration of the DMAC */
1954 read_dmac_config(pi);
1956 if (pi->pcfg.num_events == 0) {
1957 dev_err(pi->dev, "%s:%d Can't work without events!\n",
1958 __func__, __LINE__);
1962 pl330 = kzalloc(sizeof(*pl330), GFP_KERNEL);
1964 dev_err(pi->dev, "%s:%d Can't allocate memory!\n",
1965 __func__, __LINE__);
1969 /* Assign the info structure and private data */
1971 pi->pl330_data = pl330;
1973 spin_lock_init(&pl330->lock);
1975 INIT_LIST_HEAD(&pl330->req_done);
1977 /* Use default MC buffer size if not provided */
1979 pi->mcbufsz = MCODE_BUFF_PER_REQ * 2;
1981 /* Mark all events as free */
1982 for (i = 0; i < pi->pcfg.num_events; i++)
1983 pl330->events[i] = -1;
1985 /* Allocate resources needed by the DMAC */
1986 ret = dmac_alloc_resources(pl330);
1988 dev_err(pi->dev, "Unable to create channels for DMAC\n");
1993 tasklet_init(&pl330->tasks, pl330_dotask, (unsigned long) pl330);
1995 pl330->state = INIT;
1999 EXPORT_SYMBOL(pl330_add);
2001 static int dmac_free_threads(struct pl330_dmac *pl330)
2003 struct pl330_info *pi = pl330->pinfo;
2004 int chans = pi->pcfg.num_chan;
2005 struct pl330_thread *thrd;
2008 /* Release Channel threads */
2009 for (i = 0; i < chans; i++) {
2010 thrd = &pl330->channels[i];
2011 pl330_release_channel((void *)thrd);
2015 kfree(pl330->channels);
2020 static void dmac_free_resources(struct pl330_dmac *pl330)
2022 struct pl330_info *pi = pl330->pinfo;
2023 int chans = pi->pcfg.num_chan;
2025 dmac_free_threads(pl330);
2027 dma_free_coherent(pi->dev, chans * pi->mcbufsz,
2028 pl330->mcode_cpu, pl330->mcode_bus);
2031 void pl330_del(struct pl330_info *pi)
2033 struct pl330_dmac *pl330;
2035 if (!pi || !pi->pl330_data)
2038 pl330 = pi->pl330_data;
2040 pl330->state = UNINIT;
2042 tasklet_kill(&pl330->tasks);
2044 /* Free DMAC resources */
2045 dmac_free_resources(pl330);
2048 pi->pl330_data = NULL;
2050 EXPORT_SYMBOL(pl330_del);