1 // SPDX-License-Identifier: GPL-2.0
3 * TI K3 NAVSS Ring Accelerator subsystem driver
5 * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com
8 #include <linux/dma-mapping.h>
10 #include <linux/init.h>
12 #include <linux/of_device.h>
13 #include <linux/platform_device.h>
14 #include <linux/sys_soc.h>
15 #include <linux/dma/ti-cppi5.h>
16 #include <linux/soc/ti/k3-ringacc.h>
17 #include <linux/soc/ti/ti_sci_protocol.h>
18 #include <linux/soc/ti/ti_sci_inta_msi.h>
19 #include <linux/of_irq.h>
20 #include <linux/irqdomain.h>
22 static LIST_HEAD(k3_ringacc_list);
23 static DEFINE_MUTEX(k3_ringacc_list_lock);
25 #define K3_RINGACC_CFG_RING_SIZE_ELCNT_MASK GENMASK(19, 0)
26 #define K3_DMARING_CFG_RING_SIZE_ELCNT_MASK GENMASK(15, 0)
29 * struct k3_ring_rt_regs - The RA realtime Control/Status Registers region
32 * @db: Ring Doorbell Register
34 * @occ: Ring Occupancy Register
35 * @indx: Ring Current Index Register
36 * @hwocc: Ring Hardware Occupancy Register
37 * @hwindx: Ring Hardware Current Index Register
39 struct k3_ring_rt_regs {
49 #define K3_RINGACC_RT_REGS_STEP 0x1000
50 #define K3_DMARING_RT_REGS_STEP 0x2000
51 #define K3_DMARING_RT_REGS_REVERSE_OFS 0x1000
52 #define K3_RINGACC_RT_OCC_MASK GENMASK(20, 0)
53 #define K3_DMARING_RT_OCC_TDOWN_COMPLETE BIT(31)
54 #define K3_DMARING_RT_DB_ENTRY_MASK GENMASK(7, 0)
55 #define K3_DMARING_RT_DB_TDOWN_ACK BIT(31)
58 * struct k3_ring_fifo_regs - The Ring Accelerator Queues Registers region
60 * @head_data: Ring Head Entry Data Registers
61 * @tail_data: Ring Tail Entry Data Registers
62 * @peek_head_data: Ring Peek Head Entry Data Regs
63 * @peek_tail_data: Ring Peek Tail Entry Data Regs
65 struct k3_ring_fifo_regs {
68 u32 peek_head_data[128];
69 u32 peek_tail_data[128];
73 * struct k3_ringacc_proxy_gcfg_regs - RA Proxy Global Config MMIO Region
75 * @revision: Revision Register
76 * @config: Config Register
78 struct k3_ringacc_proxy_gcfg_regs {
83 #define K3_RINGACC_PROXY_CFG_THREADS_MASK GENMASK(15, 0)
86 * struct k3_ringacc_proxy_target_regs - Proxy Datapath MMIO Region
88 * @control: Proxy Control Register
89 * @status: Proxy Status Register
91 * @data: Proxy Data Register
93 struct k3_ringacc_proxy_target_regs {
100 #define K3_RINGACC_PROXY_TARGET_STEP 0x1000
101 #define K3_RINGACC_PROXY_NOT_USED (-1)
103 enum k3_ringacc_proxy_access_mode {
104 PROXY_ACCESS_MODE_HEAD = 0,
105 PROXY_ACCESS_MODE_TAIL = 1,
106 PROXY_ACCESS_MODE_PEEK_HEAD = 2,
107 PROXY_ACCESS_MODE_PEEK_TAIL = 3,
110 #define K3_RINGACC_FIFO_WINDOW_SIZE_BYTES (512U)
111 #define K3_RINGACC_FIFO_REGS_STEP 0x1000
112 #define K3_RINGACC_MAX_DB_RING_CNT (127U)
115 int (*push_tail)(struct k3_ring *ring, void *elm);
116 int (*push_head)(struct k3_ring *ring, void *elm);
117 int (*pop_tail)(struct k3_ring *ring, void *elm);
118 int (*pop_head)(struct k3_ring *ring, void *elm);
122 * struct k3_ring_state - Internal state tracking structure
124 * @free: Number of free entries
126 * @windex: Write index
127 * @rindex: Read index
129 struct k3_ring_state {
134 u32 tdown_complete:1;
138 * struct k3_ring - RA Ring descriptor
140 * @rt: Ring control/status registers
141 * @fifos: Ring queues registers
142 * @proxy: Ring Proxy Datapath registers
143 * @ring_mem_dma: Ring buffer dma address
144 * @ring_mem_virt: Ring buffer virt address
145 * @ops: Ring operations
146 * @size: Ring size in elements
147 * @elm_size: Size of the ring element
152 * @parent: Pointer on struct @k3_ringacc
153 * @use_count: Use count for shared rings
154 * @proxy_id: RA Ring Proxy Id (only if @K3_RINGACC_RING_USE_PROXY)
155 * @dma_dev: device to be used for DMA API (allocation, mapping)
156 * @asel: Address Space Select value for physical addresses
159 struct k3_ring_rt_regs __iomem *rt;
160 struct k3_ring_fifo_regs __iomem *fifos;
161 struct k3_ringacc_proxy_target_regs __iomem *proxy;
162 dma_addr_t ring_mem_dma;
164 struct k3_ring_ops *ops;
166 enum k3_ring_size elm_size;
167 enum k3_ring_mode mode;
169 #define K3_RING_FLAG_BUSY BIT(1)
170 #define K3_RING_FLAG_SHARED BIT(2)
171 #define K3_RING_FLAG_REVERSE BIT(3)
172 struct k3_ring_state state;
174 struct k3_ringacc *parent;
177 struct device *dma_dev;
179 #define K3_ADDRESS_ASEL_SHIFT 48
182 struct k3_ringacc_ops {
183 int (*init)(struct platform_device *pdev, struct k3_ringacc *ringacc);
187 * struct k3_ringacc - Rings accelerator descriptor
189 * @dev: pointer on RA device
190 * @proxy_gcfg: RA proxy global config registers
191 * @proxy_target_base: RA proxy datapath region
192 * @num_rings: number of ring in RA
193 * @rings_inuse: bitfield for ring usage tracking
194 * @rm_gp_range: general purpose rings range from tisci
195 * @dma_ring_reset_quirk: DMA reset w/a enable
196 * @num_proxies: number of RA proxies
197 * @proxy_inuse: bitfield for proxy usage tracking
198 * @rings: array of rings descriptors (struct @k3_ring)
199 * @list: list of RAs in the system
200 * @req_lock: protect rings allocation
201 * @tisci: pointer ti-sci handle
202 * @tisci_ring_ops: ti-sci rings ops
203 * @tisci_dev_id: ti-sci device id
204 * @ops: SoC specific ringacc operation
205 * @dma_rings: indicate DMA ring (dual ring within BCDMA/PKTDMA)
209 struct k3_ringacc_proxy_gcfg_regs __iomem *proxy_gcfg;
210 void __iomem *proxy_target_base;
211 u32 num_rings; /* number of rings in Ringacc module */
212 unsigned long *rings_inuse;
213 struct ti_sci_resource *rm_gp_range;
215 bool dma_ring_reset_quirk;
217 unsigned long *proxy_inuse;
219 struct k3_ring *rings;
220 struct list_head list;
221 struct mutex req_lock; /* protect rings allocation */
223 const struct ti_sci_handle *tisci;
224 const struct ti_sci_rm_ringacc_ops *tisci_ring_ops;
227 const struct k3_ringacc_ops *ops;
232 * struct k3_ringacc - Rings accelerator SoC data
234 * @dma_ring_reset_quirk: DMA reset w/a enable
236 struct k3_ringacc_soc_data {
237 unsigned dma_ring_reset_quirk:1;
240 static int k3_ringacc_ring_read_occ(struct k3_ring *ring)
242 return readl(&ring->rt->occ) & K3_RINGACC_RT_OCC_MASK;
245 static void k3_ringacc_ring_update_occ(struct k3_ring *ring)
249 val = readl(&ring->rt->occ);
251 ring->state.occ = val & K3_RINGACC_RT_OCC_MASK;
252 ring->state.tdown_complete = !!(val & K3_DMARING_RT_OCC_TDOWN_COMPLETE);
255 static long k3_ringacc_ring_get_fifo_pos(struct k3_ring *ring)
257 return K3_RINGACC_FIFO_WINDOW_SIZE_BYTES -
258 (4 << ring->elm_size);
261 static void *k3_ringacc_get_elm_addr(struct k3_ring *ring, u32 idx)
263 return (ring->ring_mem_virt + idx * (4 << ring->elm_size));
266 static int k3_ringacc_ring_push_mem(struct k3_ring *ring, void *elem);
267 static int k3_ringacc_ring_pop_mem(struct k3_ring *ring, void *elem);
268 static int k3_dmaring_fwd_pop(struct k3_ring *ring, void *elem);
269 static int k3_dmaring_reverse_pop(struct k3_ring *ring, void *elem);
271 static struct k3_ring_ops k3_ring_mode_ring_ops = {
272 .push_tail = k3_ringacc_ring_push_mem,
273 .pop_head = k3_ringacc_ring_pop_mem,
276 static struct k3_ring_ops k3_dmaring_fwd_ops = {
277 .push_tail = k3_ringacc_ring_push_mem,
278 .pop_head = k3_dmaring_fwd_pop,
281 static struct k3_ring_ops k3_dmaring_reverse_ops = {
282 /* Reverse side of the DMA ring can only be popped by SW */
283 .pop_head = k3_dmaring_reverse_pop,
286 static int k3_ringacc_ring_push_io(struct k3_ring *ring, void *elem);
287 static int k3_ringacc_ring_pop_io(struct k3_ring *ring, void *elem);
288 static int k3_ringacc_ring_push_head_io(struct k3_ring *ring, void *elem);
289 static int k3_ringacc_ring_pop_tail_io(struct k3_ring *ring, void *elem);
291 static struct k3_ring_ops k3_ring_mode_msg_ops = {
292 .push_tail = k3_ringacc_ring_push_io,
293 .push_head = k3_ringacc_ring_push_head_io,
294 .pop_tail = k3_ringacc_ring_pop_tail_io,
295 .pop_head = k3_ringacc_ring_pop_io,
298 static int k3_ringacc_ring_push_head_proxy(struct k3_ring *ring, void *elem);
299 static int k3_ringacc_ring_push_tail_proxy(struct k3_ring *ring, void *elem);
300 static int k3_ringacc_ring_pop_head_proxy(struct k3_ring *ring, void *elem);
301 static int k3_ringacc_ring_pop_tail_proxy(struct k3_ring *ring, void *elem);
303 static struct k3_ring_ops k3_ring_mode_proxy_ops = {
304 .push_tail = k3_ringacc_ring_push_tail_proxy,
305 .push_head = k3_ringacc_ring_push_head_proxy,
306 .pop_tail = k3_ringacc_ring_pop_tail_proxy,
307 .pop_head = k3_ringacc_ring_pop_head_proxy,
310 static void k3_ringacc_ring_dump(struct k3_ring *ring)
312 struct device *dev = ring->parent->dev;
314 dev_dbg(dev, "dump ring: %d\n", ring->ring_id);
315 dev_dbg(dev, "dump mem virt %p, dma %pad\n", ring->ring_mem_virt,
316 &ring->ring_mem_dma);
317 dev_dbg(dev, "dump elmsize %d, size %d, mode %d, proxy_id %d\n",
318 ring->elm_size, ring->size, ring->mode, ring->proxy_id);
319 dev_dbg(dev, "dump flags %08X\n", ring->flags);
321 dev_dbg(dev, "dump ring_rt_regs: db%08x\n", readl(&ring->rt->db));
322 dev_dbg(dev, "dump occ%08x\n", readl(&ring->rt->occ));
323 dev_dbg(dev, "dump indx%08x\n", readl(&ring->rt->indx));
324 dev_dbg(dev, "dump hwocc%08x\n", readl(&ring->rt->hwocc));
325 dev_dbg(dev, "dump hwindx%08x\n", readl(&ring->rt->hwindx));
327 if (ring->ring_mem_virt)
328 print_hex_dump_debug("dump ring_mem_virt ", DUMP_PREFIX_NONE,
329 16, 1, ring->ring_mem_virt, 16 * 8, false);
332 struct k3_ring *k3_ringacc_request_ring(struct k3_ringacc *ringacc,
335 int proxy_id = K3_RINGACC_PROXY_NOT_USED;
337 mutex_lock(&ringacc->req_lock);
339 if (id == K3_RINGACC_RING_ID_ANY) {
340 /* Request for any general purpose ring */
341 struct ti_sci_resource_desc *gp_rings =
342 &ringacc->rm_gp_range->desc[0];
345 size = gp_rings->start + gp_rings->num;
346 id = find_next_zero_bit(ringacc->rings_inuse, size,
354 if (test_bit(id, ringacc->rings_inuse) &&
355 !(ringacc->rings[id].flags & K3_RING_FLAG_SHARED))
357 else if (ringacc->rings[id].flags & K3_RING_FLAG_SHARED)
360 if (flags & K3_RINGACC_RING_USE_PROXY) {
361 proxy_id = find_first_zero_bit(ringacc->proxy_inuse,
362 ringacc->num_proxies);
363 if (proxy_id == ringacc->num_proxies)
367 if (proxy_id != K3_RINGACC_PROXY_NOT_USED) {
368 set_bit(proxy_id, ringacc->proxy_inuse);
369 ringacc->rings[id].proxy_id = proxy_id;
370 dev_dbg(ringacc->dev, "Giving ring#%d proxy#%d\n", id,
373 dev_dbg(ringacc->dev, "Giving ring#%d\n", id);
376 set_bit(id, ringacc->rings_inuse);
378 ringacc->rings[id].use_count++;
379 mutex_unlock(&ringacc->req_lock);
380 return &ringacc->rings[id];
383 mutex_unlock(&ringacc->req_lock);
386 EXPORT_SYMBOL_GPL(k3_ringacc_request_ring);
388 static int k3_dmaring_request_dual_ring(struct k3_ringacc *ringacc, int fwd_id,
389 struct k3_ring **fwd_ring,
390 struct k3_ring **compl_ring)
395 * DMA rings must be requested by ID, completion ring is the reverse
396 * side of the forward ring
401 mutex_lock(&ringacc->req_lock);
403 if (test_bit(fwd_id, ringacc->rings_inuse)) {
408 *fwd_ring = &ringacc->rings[fwd_id];
409 *compl_ring = &ringacc->rings[fwd_id + ringacc->num_rings];
410 set_bit(fwd_id, ringacc->rings_inuse);
411 ringacc->rings[fwd_id].use_count++;
412 dev_dbg(ringacc->dev, "Giving ring#%d\n", fwd_id);
414 mutex_unlock(&ringacc->req_lock);
418 mutex_unlock(&ringacc->req_lock);
422 int k3_ringacc_request_rings_pair(struct k3_ringacc *ringacc,
423 int fwd_id, int compl_id,
424 struct k3_ring **fwd_ring,
425 struct k3_ring **compl_ring)
429 if (!fwd_ring || !compl_ring)
432 if (ringacc->dma_rings)
433 return k3_dmaring_request_dual_ring(ringacc, fwd_id,
434 fwd_ring, compl_ring);
436 *fwd_ring = k3_ringacc_request_ring(ringacc, fwd_id, 0);
440 *compl_ring = k3_ringacc_request_ring(ringacc, compl_id, 0);
441 if (!(*compl_ring)) {
442 k3_ringacc_ring_free(*fwd_ring);
448 EXPORT_SYMBOL_GPL(k3_ringacc_request_rings_pair);
450 static void k3_ringacc_ring_reset_sci(struct k3_ring *ring)
452 struct ti_sci_msg_rm_ring_cfg ring_cfg = { 0 };
453 struct k3_ringacc *ringacc = ring->parent;
456 ring_cfg.nav_id = ringacc->tisci_dev_id;
457 ring_cfg.index = ring->ring_id;
458 ring_cfg.valid_params = TI_SCI_MSG_VALUE_RM_RING_COUNT_VALID;
459 ring_cfg.count = ring->size;
461 ret = ringacc->tisci_ring_ops->set_cfg(ringacc->tisci, &ring_cfg);
463 dev_err(ringacc->dev, "TISCI reset ring fail (%d) ring_idx %d\n",
467 void k3_ringacc_ring_reset(struct k3_ring *ring)
469 if (!ring || !(ring->flags & K3_RING_FLAG_BUSY))
472 memset(&ring->state, 0, sizeof(ring->state));
474 k3_ringacc_ring_reset_sci(ring);
476 EXPORT_SYMBOL_GPL(k3_ringacc_ring_reset);
478 static void k3_ringacc_ring_reconfig_qmode_sci(struct k3_ring *ring,
479 enum k3_ring_mode mode)
481 struct ti_sci_msg_rm_ring_cfg ring_cfg = { 0 };
482 struct k3_ringacc *ringacc = ring->parent;
485 ring_cfg.nav_id = ringacc->tisci_dev_id;
486 ring_cfg.index = ring->ring_id;
487 ring_cfg.valid_params = TI_SCI_MSG_VALUE_RM_RING_MODE_VALID;
488 ring_cfg.mode = mode;
490 ret = ringacc->tisci_ring_ops->set_cfg(ringacc->tisci, &ring_cfg);
492 dev_err(ringacc->dev, "TISCI reconf qmode fail (%d) ring_idx %d\n",
496 void k3_ringacc_ring_reset_dma(struct k3_ring *ring, u32 occ)
498 if (!ring || !(ring->flags & K3_RING_FLAG_BUSY))
501 if (!ring->parent->dma_ring_reset_quirk)
505 occ = k3_ringacc_ring_read_occ(ring);
508 u32 db_ring_cnt, db_ring_cnt_cur;
510 dev_dbg(ring->parent->dev, "%s %u occ: %u\n", __func__,
512 /* TI-SCI ring reset */
513 k3_ringacc_ring_reset_sci(ring);
516 * Setup the ring in ring/doorbell mode (if not already in this
519 if (ring->mode != K3_RINGACC_RING_MODE_RING)
520 k3_ringacc_ring_reconfig_qmode_sci(
521 ring, K3_RINGACC_RING_MODE_RING);
523 * Ring the doorbell 2**22 – ringOcc times.
524 * This will wrap the internal UDMAP ring state occupancy
525 * counter (which is 21-bits wide) to 0.
527 db_ring_cnt = (1U << 22) - occ;
529 while (db_ring_cnt != 0) {
531 * Ring the doorbell with the maximum count each
532 * iteration if possible to minimize the total
535 if (db_ring_cnt > K3_RINGACC_MAX_DB_RING_CNT)
536 db_ring_cnt_cur = K3_RINGACC_MAX_DB_RING_CNT;
538 db_ring_cnt_cur = db_ring_cnt;
540 writel(db_ring_cnt_cur, &ring->rt->db);
541 db_ring_cnt -= db_ring_cnt_cur;
544 /* Restore the original ring mode (if not ring mode) */
545 if (ring->mode != K3_RINGACC_RING_MODE_RING)
546 k3_ringacc_ring_reconfig_qmode_sci(ring, ring->mode);
551 k3_ringacc_ring_reset(ring);
553 EXPORT_SYMBOL_GPL(k3_ringacc_ring_reset_dma);
555 static void k3_ringacc_ring_free_sci(struct k3_ring *ring)
557 struct ti_sci_msg_rm_ring_cfg ring_cfg = { 0 };
558 struct k3_ringacc *ringacc = ring->parent;
561 ring_cfg.nav_id = ringacc->tisci_dev_id;
562 ring_cfg.index = ring->ring_id;
563 ring_cfg.valid_params = TI_SCI_MSG_VALUE_RM_ALL_NO_ORDER;
565 ret = ringacc->tisci_ring_ops->set_cfg(ringacc->tisci, &ring_cfg);
567 dev_err(ringacc->dev, "TISCI ring free fail (%d) ring_idx %d\n",
571 int k3_ringacc_ring_free(struct k3_ring *ring)
573 struct k3_ringacc *ringacc;
578 ringacc = ring->parent;
581 * DMA rings: rings shared memory and configuration, only forward ring
582 * is configured and reverse ring considered as slave.
584 if (ringacc->dma_rings && (ring->flags & K3_RING_FLAG_REVERSE))
587 dev_dbg(ring->parent->dev, "flags: 0x%08x\n", ring->flags);
589 if (!test_bit(ring->ring_id, ringacc->rings_inuse))
592 mutex_lock(&ringacc->req_lock);
594 if (--ring->use_count)
597 if (!(ring->flags & K3_RING_FLAG_BUSY))
600 k3_ringacc_ring_free_sci(ring);
602 dma_free_coherent(ring->dma_dev,
603 ring->size * (4 << ring->elm_size),
604 ring->ring_mem_virt, ring->ring_mem_dma);
607 ring->dma_dev = NULL;
610 if (ring->proxy_id != K3_RINGACC_PROXY_NOT_USED) {
611 clear_bit(ring->proxy_id, ringacc->proxy_inuse);
613 ring->proxy_id = K3_RINGACC_PROXY_NOT_USED;
617 clear_bit(ring->ring_id, ringacc->rings_inuse);
620 mutex_unlock(&ringacc->req_lock);
623 EXPORT_SYMBOL_GPL(k3_ringacc_ring_free);
625 u32 k3_ringacc_get_ring_id(struct k3_ring *ring)
630 return ring->ring_id;
632 EXPORT_SYMBOL_GPL(k3_ringacc_get_ring_id);
634 u32 k3_ringacc_get_tisci_dev_id(struct k3_ring *ring)
639 return ring->parent->tisci_dev_id;
641 EXPORT_SYMBOL_GPL(k3_ringacc_get_tisci_dev_id);
643 int k3_ringacc_get_ring_irq_num(struct k3_ring *ring)
650 irq_num = msi_get_virq(ring->parent->dev, ring->ring_id);
655 EXPORT_SYMBOL_GPL(k3_ringacc_get_ring_irq_num);
657 static int k3_ringacc_ring_cfg_sci(struct k3_ring *ring)
659 struct ti_sci_msg_rm_ring_cfg ring_cfg = { 0 };
660 struct k3_ringacc *ringacc = ring->parent;
666 ring_cfg.nav_id = ringacc->tisci_dev_id;
667 ring_cfg.index = ring->ring_id;
668 ring_cfg.valid_params = TI_SCI_MSG_VALUE_RM_ALL_NO_ORDER;
669 ring_cfg.addr_lo = lower_32_bits(ring->ring_mem_dma);
670 ring_cfg.addr_hi = upper_32_bits(ring->ring_mem_dma);
671 ring_cfg.count = ring->size;
672 ring_cfg.mode = ring->mode;
673 ring_cfg.size = ring->elm_size;
674 ring_cfg.asel = ring->asel;
676 ret = ringacc->tisci_ring_ops->set_cfg(ringacc->tisci, &ring_cfg);
678 dev_err(ringacc->dev, "TISCI config ring fail (%d) ring_idx %d\n",
684 static int k3_dmaring_cfg(struct k3_ring *ring, struct k3_ring_cfg *cfg)
686 struct k3_ringacc *ringacc;
687 struct k3_ring *reverse_ring;
690 if (cfg->elm_size != K3_RINGACC_RING_ELSIZE_8 ||
691 cfg->mode != K3_RINGACC_RING_MODE_RING ||
692 cfg->size & ~K3_DMARING_CFG_RING_SIZE_ELCNT_MASK)
695 ringacc = ring->parent;
698 * DMA rings: rings shared memory and configuration, only forward ring
699 * is configured and reverse ring considered as slave.
701 if (ringacc->dma_rings && (ring->flags & K3_RING_FLAG_REVERSE))
704 if (!test_bit(ring->ring_id, ringacc->rings_inuse))
707 ring->size = cfg->size;
708 ring->elm_size = cfg->elm_size;
709 ring->mode = cfg->mode;
710 ring->asel = cfg->asel;
711 ring->dma_dev = cfg->dma_dev;
712 if (!ring->dma_dev) {
713 dev_warn(ringacc->dev, "dma_dev is not provided for ring%d\n",
715 ring->dma_dev = ringacc->dev;
718 memset(&ring->state, 0, sizeof(ring->state));
720 ring->ops = &k3_dmaring_fwd_ops;
722 ring->ring_mem_virt = dma_alloc_coherent(ring->dma_dev,
723 ring->size * (4 << ring->elm_size),
724 &ring->ring_mem_dma, GFP_KERNEL);
725 if (!ring->ring_mem_virt) {
726 dev_err(ringacc->dev, "Failed to alloc ring mem\n");
731 ret = k3_ringacc_ring_cfg_sci(ring);
735 ring->flags |= K3_RING_FLAG_BUSY;
737 k3_ringacc_ring_dump(ring);
739 /* DMA rings: configure reverse ring */
740 reverse_ring = &ringacc->rings[ring->ring_id + ringacc->num_rings];
741 reverse_ring->size = cfg->size;
742 reverse_ring->elm_size = cfg->elm_size;
743 reverse_ring->mode = cfg->mode;
744 reverse_ring->asel = cfg->asel;
745 memset(&reverse_ring->state, 0, sizeof(reverse_ring->state));
746 reverse_ring->ops = &k3_dmaring_reverse_ops;
748 reverse_ring->ring_mem_virt = ring->ring_mem_virt;
749 reverse_ring->ring_mem_dma = ring->ring_mem_dma;
750 reverse_ring->flags |= K3_RING_FLAG_BUSY;
751 k3_ringacc_ring_dump(reverse_ring);
756 dma_free_coherent(ring->dma_dev,
757 ring->size * (4 << ring->elm_size),
763 ring->dma_dev = NULL;
768 int k3_ringacc_ring_cfg(struct k3_ring *ring, struct k3_ring_cfg *cfg)
770 struct k3_ringacc *ringacc;
776 ringacc = ring->parent;
778 if (ringacc->dma_rings)
779 return k3_dmaring_cfg(ring, cfg);
781 if (cfg->elm_size > K3_RINGACC_RING_ELSIZE_256 ||
782 cfg->mode >= K3_RINGACC_RING_MODE_INVALID ||
783 cfg->size & ~K3_RINGACC_CFG_RING_SIZE_ELCNT_MASK ||
784 !test_bit(ring->ring_id, ringacc->rings_inuse))
787 if (cfg->mode == K3_RINGACC_RING_MODE_MESSAGE &&
788 ring->proxy_id == K3_RINGACC_PROXY_NOT_USED &&
789 cfg->elm_size > K3_RINGACC_RING_ELSIZE_8) {
790 dev_err(ringacc->dev,
791 "Message mode must use proxy for %u element size\n",
792 4 << ring->elm_size);
797 * In case of shared ring only the first user (master user) can
798 * configure the ring. The sequence should be by the client:
799 * ring = k3_ringacc_request_ring(ringacc, ring_id, 0); # master user
800 * k3_ringacc_ring_cfg(ring, cfg); # master configuration
801 * k3_ringacc_request_ring(ringacc, ring_id, K3_RING_FLAG_SHARED);
802 * k3_ringacc_request_ring(ringacc, ring_id, K3_RING_FLAG_SHARED);
804 if (ring->use_count != 1)
807 ring->size = cfg->size;
808 ring->elm_size = cfg->elm_size;
809 ring->mode = cfg->mode;
810 memset(&ring->state, 0, sizeof(ring->state));
812 if (ring->proxy_id != K3_RINGACC_PROXY_NOT_USED)
813 ring->proxy = ringacc->proxy_target_base +
814 ring->proxy_id * K3_RINGACC_PROXY_TARGET_STEP;
816 switch (ring->mode) {
817 case K3_RINGACC_RING_MODE_RING:
818 ring->ops = &k3_ring_mode_ring_ops;
819 ring->dma_dev = cfg->dma_dev;
821 ring->dma_dev = ringacc->dev;
823 case K3_RINGACC_RING_MODE_MESSAGE:
824 ring->dma_dev = ringacc->dev;
826 ring->ops = &k3_ring_mode_proxy_ops;
828 ring->ops = &k3_ring_mode_msg_ops;
836 ring->ring_mem_virt = dma_alloc_coherent(ring->dma_dev,
837 ring->size * (4 << ring->elm_size),
838 &ring->ring_mem_dma, GFP_KERNEL);
839 if (!ring->ring_mem_virt) {
840 dev_err(ringacc->dev, "Failed to alloc ring mem\n");
845 ret = k3_ringacc_ring_cfg_sci(ring);
850 ring->flags |= K3_RING_FLAG_BUSY;
851 ring->flags |= (cfg->flags & K3_RINGACC_RING_SHARED) ?
852 K3_RING_FLAG_SHARED : 0;
854 k3_ringacc_ring_dump(ring);
859 dma_free_coherent(ring->dma_dev,
860 ring->size * (4 << ring->elm_size),
865 ring->dma_dev = NULL;
870 EXPORT_SYMBOL_GPL(k3_ringacc_ring_cfg);
872 u32 k3_ringacc_ring_get_size(struct k3_ring *ring)
874 if (!ring || !(ring->flags & K3_RING_FLAG_BUSY))
879 EXPORT_SYMBOL_GPL(k3_ringacc_ring_get_size);
881 u32 k3_ringacc_ring_get_free(struct k3_ring *ring)
883 if (!ring || !(ring->flags & K3_RING_FLAG_BUSY))
886 if (!ring->state.free)
887 ring->state.free = ring->size - k3_ringacc_ring_read_occ(ring);
889 return ring->state.free;
891 EXPORT_SYMBOL_GPL(k3_ringacc_ring_get_free);
893 u32 k3_ringacc_ring_get_occ(struct k3_ring *ring)
895 if (!ring || !(ring->flags & K3_RING_FLAG_BUSY))
898 return k3_ringacc_ring_read_occ(ring);
900 EXPORT_SYMBOL_GPL(k3_ringacc_ring_get_occ);
902 u32 k3_ringacc_ring_is_full(struct k3_ring *ring)
904 return !k3_ringacc_ring_get_free(ring);
906 EXPORT_SYMBOL_GPL(k3_ringacc_ring_is_full);
908 enum k3_ringacc_access_mode {
909 K3_RINGACC_ACCESS_MODE_PUSH_HEAD,
910 K3_RINGACC_ACCESS_MODE_POP_HEAD,
911 K3_RINGACC_ACCESS_MODE_PUSH_TAIL,
912 K3_RINGACC_ACCESS_MODE_POP_TAIL,
913 K3_RINGACC_ACCESS_MODE_PEEK_HEAD,
914 K3_RINGACC_ACCESS_MODE_PEEK_TAIL,
917 #define K3_RINGACC_PROXY_MODE(x) (((x) & 0x3) << 16)
918 #define K3_RINGACC_PROXY_ELSIZE(x) (((x) & 0x7) << 24)
919 static int k3_ringacc_ring_cfg_proxy(struct k3_ring *ring,
920 enum k3_ringacc_proxy_access_mode mode)
925 val |= K3_RINGACC_PROXY_MODE(mode);
926 val |= K3_RINGACC_PROXY_ELSIZE(ring->elm_size);
927 writel(val, &ring->proxy->control);
931 static int k3_ringacc_ring_access_proxy(struct k3_ring *ring, void *elem,
932 enum k3_ringacc_access_mode access_mode)
936 ptr = (void __iomem *)&ring->proxy->data;
938 switch (access_mode) {
939 case K3_RINGACC_ACCESS_MODE_PUSH_HEAD:
940 case K3_RINGACC_ACCESS_MODE_POP_HEAD:
941 k3_ringacc_ring_cfg_proxy(ring, PROXY_ACCESS_MODE_HEAD);
943 case K3_RINGACC_ACCESS_MODE_PUSH_TAIL:
944 case K3_RINGACC_ACCESS_MODE_POP_TAIL:
945 k3_ringacc_ring_cfg_proxy(ring, PROXY_ACCESS_MODE_TAIL);
951 ptr += k3_ringacc_ring_get_fifo_pos(ring);
953 switch (access_mode) {
954 case K3_RINGACC_ACCESS_MODE_POP_HEAD:
955 case K3_RINGACC_ACCESS_MODE_POP_TAIL:
956 dev_dbg(ring->parent->dev,
957 "proxy:memcpy_fromio(x): --> ptr(%p), mode:%d\n", ptr,
959 memcpy_fromio(elem, ptr, (4 << ring->elm_size));
962 case K3_RINGACC_ACCESS_MODE_PUSH_TAIL:
963 case K3_RINGACC_ACCESS_MODE_PUSH_HEAD:
964 dev_dbg(ring->parent->dev,
965 "proxy:memcpy_toio(x): --> ptr(%p), mode:%d\n", ptr,
967 memcpy_toio(ptr, elem, (4 << ring->elm_size));
974 dev_dbg(ring->parent->dev, "proxy: free%d occ%d\n", ring->state.free,
979 static int k3_ringacc_ring_push_head_proxy(struct k3_ring *ring, void *elem)
981 return k3_ringacc_ring_access_proxy(ring, elem,
982 K3_RINGACC_ACCESS_MODE_PUSH_HEAD);
985 static int k3_ringacc_ring_push_tail_proxy(struct k3_ring *ring, void *elem)
987 return k3_ringacc_ring_access_proxy(ring, elem,
988 K3_RINGACC_ACCESS_MODE_PUSH_TAIL);
991 static int k3_ringacc_ring_pop_head_proxy(struct k3_ring *ring, void *elem)
993 return k3_ringacc_ring_access_proxy(ring, elem,
994 K3_RINGACC_ACCESS_MODE_POP_HEAD);
997 static int k3_ringacc_ring_pop_tail_proxy(struct k3_ring *ring, void *elem)
999 return k3_ringacc_ring_access_proxy(ring, elem,
1000 K3_RINGACC_ACCESS_MODE_POP_HEAD);
1003 static int k3_ringacc_ring_access_io(struct k3_ring *ring, void *elem,
1004 enum k3_ringacc_access_mode access_mode)
1008 switch (access_mode) {
1009 case K3_RINGACC_ACCESS_MODE_PUSH_HEAD:
1010 case K3_RINGACC_ACCESS_MODE_POP_HEAD:
1011 ptr = (void __iomem *)&ring->fifos->head_data;
1013 case K3_RINGACC_ACCESS_MODE_PUSH_TAIL:
1014 case K3_RINGACC_ACCESS_MODE_POP_TAIL:
1015 ptr = (void __iomem *)&ring->fifos->tail_data;
1021 ptr += k3_ringacc_ring_get_fifo_pos(ring);
1023 switch (access_mode) {
1024 case K3_RINGACC_ACCESS_MODE_POP_HEAD:
1025 case K3_RINGACC_ACCESS_MODE_POP_TAIL:
1026 dev_dbg(ring->parent->dev,
1027 "memcpy_fromio(x): --> ptr(%p), mode:%d\n", ptr,
1029 memcpy_fromio(elem, ptr, (4 << ring->elm_size));
1032 case K3_RINGACC_ACCESS_MODE_PUSH_TAIL:
1033 case K3_RINGACC_ACCESS_MODE_PUSH_HEAD:
1034 dev_dbg(ring->parent->dev,
1035 "memcpy_toio(x): --> ptr(%p), mode:%d\n", ptr,
1037 memcpy_toio(ptr, elem, (4 << ring->elm_size));
1044 dev_dbg(ring->parent->dev, "free%d index%d occ%d index%d\n",
1045 ring->state.free, ring->state.windex, ring->state.occ,
1046 ring->state.rindex);
1050 static int k3_ringacc_ring_push_head_io(struct k3_ring *ring, void *elem)
1052 return k3_ringacc_ring_access_io(ring, elem,
1053 K3_RINGACC_ACCESS_MODE_PUSH_HEAD);
1056 static int k3_ringacc_ring_push_io(struct k3_ring *ring, void *elem)
1058 return k3_ringacc_ring_access_io(ring, elem,
1059 K3_RINGACC_ACCESS_MODE_PUSH_TAIL);
1062 static int k3_ringacc_ring_pop_io(struct k3_ring *ring, void *elem)
1064 return k3_ringacc_ring_access_io(ring, elem,
1065 K3_RINGACC_ACCESS_MODE_POP_HEAD);
1068 static int k3_ringacc_ring_pop_tail_io(struct k3_ring *ring, void *elem)
1070 return k3_ringacc_ring_access_io(ring, elem,
1071 K3_RINGACC_ACCESS_MODE_POP_HEAD);
1075 * The element is 48 bits of address + ASEL bits in the ring.
1076 * ASEL is used by the DMAs and should be removed for the kernel as it is not
1077 * part of the physical memory address.
1079 static void k3_dmaring_remove_asel_from_elem(u64 *elem)
1081 *elem &= GENMASK_ULL(K3_ADDRESS_ASEL_SHIFT - 1, 0);
1084 static int k3_dmaring_fwd_pop(struct k3_ring *ring, void *elem)
1090 * DMA rings: forward ring is always tied DMA channel and HW does not
1091 * maintain any state data required for POP operation and its unknown
1092 * how much elements were consumed by HW. So, to actually
1093 * do POP, the read pointer has to be recalculated every time.
1095 ring->state.occ = k3_ringacc_ring_read_occ(ring);
1096 if (ring->state.windex >= ring->state.occ)
1097 elem_idx = ring->state.windex - ring->state.occ;
1099 elem_idx = ring->size - (ring->state.occ - ring->state.windex);
1101 elem_ptr = k3_ringacc_get_elm_addr(ring, elem_idx);
1102 memcpy(elem, elem_ptr, (4 << ring->elm_size));
1103 k3_dmaring_remove_asel_from_elem(elem);
1106 writel(-1, &ring->rt->db);
1108 dev_dbg(ring->parent->dev, "%s: occ%d Windex%d Rindex%d pos_ptr%px\n",
1109 __func__, ring->state.occ, ring->state.windex, elem_idx,
1114 static int k3_dmaring_reverse_pop(struct k3_ring *ring, void *elem)
1118 elem_ptr = k3_ringacc_get_elm_addr(ring, ring->state.rindex);
1120 if (ring->state.occ) {
1121 memcpy(elem, elem_ptr, (4 << ring->elm_size));
1122 k3_dmaring_remove_asel_from_elem(elem);
1124 ring->state.rindex = (ring->state.rindex + 1) % ring->size;
1126 writel(-1 & K3_DMARING_RT_DB_ENTRY_MASK, &ring->rt->db);
1127 } else if (ring->state.tdown_complete) {
1128 dma_addr_t *value = elem;
1130 *value = CPPI5_TDCM_MARKER;
1131 writel(K3_DMARING_RT_DB_TDOWN_ACK, &ring->rt->db);
1132 ring->state.tdown_complete = false;
1135 dev_dbg(ring->parent->dev, "%s: occ%d index%d pos_ptr%px\n",
1136 __func__, ring->state.occ, ring->state.rindex, elem_ptr);
1140 static int k3_ringacc_ring_push_mem(struct k3_ring *ring, void *elem)
1144 elem_ptr = k3_ringacc_get_elm_addr(ring, ring->state.windex);
1146 memcpy(elem_ptr, elem, (4 << ring->elm_size));
1147 if (ring->parent->dma_rings) {
1148 u64 *addr = elem_ptr;
1150 *addr |= ((u64)ring->asel << K3_ADDRESS_ASEL_SHIFT);
1153 ring->state.windex = (ring->state.windex + 1) % ring->size;
1155 writel(1, &ring->rt->db);
1157 dev_dbg(ring->parent->dev, "ring_push_mem: free%d index%d\n",
1158 ring->state.free, ring->state.windex);
1163 static int k3_ringacc_ring_pop_mem(struct k3_ring *ring, void *elem)
1167 elem_ptr = k3_ringacc_get_elm_addr(ring, ring->state.rindex);
1169 memcpy(elem, elem_ptr, (4 << ring->elm_size));
1171 ring->state.rindex = (ring->state.rindex + 1) % ring->size;
1173 writel(-1, &ring->rt->db);
1175 dev_dbg(ring->parent->dev, "ring_pop_mem: occ%d index%d pos_ptr%p\n",
1176 ring->state.occ, ring->state.rindex, elem_ptr);
1180 int k3_ringacc_ring_push(struct k3_ring *ring, void *elem)
1182 int ret = -EOPNOTSUPP;
1184 if (!ring || !(ring->flags & K3_RING_FLAG_BUSY))
1187 dev_dbg(ring->parent->dev, "ring_push: free%d index%d\n",
1188 ring->state.free, ring->state.windex);
1190 if (k3_ringacc_ring_is_full(ring))
1193 if (ring->ops && ring->ops->push_tail)
1194 ret = ring->ops->push_tail(ring, elem);
1198 EXPORT_SYMBOL_GPL(k3_ringacc_ring_push);
1200 int k3_ringacc_ring_push_head(struct k3_ring *ring, void *elem)
1202 int ret = -EOPNOTSUPP;
1204 if (!ring || !(ring->flags & K3_RING_FLAG_BUSY))
1207 dev_dbg(ring->parent->dev, "ring_push_head: free%d index%d\n",
1208 ring->state.free, ring->state.windex);
1210 if (k3_ringacc_ring_is_full(ring))
1213 if (ring->ops && ring->ops->push_head)
1214 ret = ring->ops->push_head(ring, elem);
1218 EXPORT_SYMBOL_GPL(k3_ringacc_ring_push_head);
1220 int k3_ringacc_ring_pop(struct k3_ring *ring, void *elem)
1222 int ret = -EOPNOTSUPP;
1224 if (!ring || !(ring->flags & K3_RING_FLAG_BUSY))
1227 if (!ring->state.occ)
1228 k3_ringacc_ring_update_occ(ring);
1230 dev_dbg(ring->parent->dev, "ring_pop: occ%d index%d\n", ring->state.occ,
1231 ring->state.rindex);
1233 if (!ring->state.occ && !ring->state.tdown_complete)
1236 if (ring->ops && ring->ops->pop_head)
1237 ret = ring->ops->pop_head(ring, elem);
1241 EXPORT_SYMBOL_GPL(k3_ringacc_ring_pop);
1243 int k3_ringacc_ring_pop_tail(struct k3_ring *ring, void *elem)
1245 int ret = -EOPNOTSUPP;
1247 if (!ring || !(ring->flags & K3_RING_FLAG_BUSY))
1250 if (!ring->state.occ)
1251 k3_ringacc_ring_update_occ(ring);
1253 dev_dbg(ring->parent->dev, "ring_pop_tail: occ%d index%d\n",
1254 ring->state.occ, ring->state.rindex);
1256 if (!ring->state.occ)
1259 if (ring->ops && ring->ops->pop_tail)
1260 ret = ring->ops->pop_tail(ring, elem);
1264 EXPORT_SYMBOL_GPL(k3_ringacc_ring_pop_tail);
1266 struct k3_ringacc *of_k3_ringacc_get_by_phandle(struct device_node *np,
1267 const char *property)
1269 struct device_node *ringacc_np;
1270 struct k3_ringacc *ringacc = ERR_PTR(-EPROBE_DEFER);
1271 struct k3_ringacc *entry;
1273 ringacc_np = of_parse_phandle(np, property, 0);
1275 return ERR_PTR(-ENODEV);
1277 mutex_lock(&k3_ringacc_list_lock);
1278 list_for_each_entry(entry, &k3_ringacc_list, list)
1279 if (entry->dev->of_node == ringacc_np) {
1283 mutex_unlock(&k3_ringacc_list_lock);
1284 of_node_put(ringacc_np);
1288 EXPORT_SYMBOL_GPL(of_k3_ringacc_get_by_phandle);
1290 static int k3_ringacc_probe_dt(struct k3_ringacc *ringacc)
1292 struct device_node *node = ringacc->dev->of_node;
1293 struct device *dev = ringacc->dev;
1294 struct platform_device *pdev = to_platform_device(dev);
1298 dev_err(dev, "device tree info unavailable\n");
1302 ret = of_property_read_u32(node, "ti,num-rings", &ringacc->num_rings);
1304 dev_err(dev, "ti,num-rings read failure %d\n", ret);
1308 ringacc->tisci = ti_sci_get_by_phandle(node, "ti,sci");
1309 if (IS_ERR(ringacc->tisci)) {
1310 ret = PTR_ERR(ringacc->tisci);
1311 if (ret != -EPROBE_DEFER)
1312 dev_err(dev, "ti,sci read fail %d\n", ret);
1313 ringacc->tisci = NULL;
1317 ret = of_property_read_u32(node, "ti,sci-dev-id",
1318 &ringacc->tisci_dev_id);
1320 dev_err(dev, "ti,sci-dev-id read fail %d\n", ret);
1324 pdev->id = ringacc->tisci_dev_id;
1326 ringacc->rm_gp_range = devm_ti_sci_get_of_resource(ringacc->tisci, dev,
1327 ringacc->tisci_dev_id,
1328 "ti,sci-rm-range-gp-rings");
1329 if (IS_ERR(ringacc->rm_gp_range)) {
1330 dev_err(dev, "Failed to allocate MSI interrupts\n");
1331 return PTR_ERR(ringacc->rm_gp_range);
1334 return ti_sci_inta_msi_domain_alloc_irqs(ringacc->dev,
1335 ringacc->rm_gp_range);
1338 static const struct k3_ringacc_soc_data k3_ringacc_soc_data_sr1 = {
1339 .dma_ring_reset_quirk = 1,
1342 static const struct soc_device_attribute k3_ringacc_socinfo[] = {
1343 { .family = "AM65X",
1344 .revision = "SR1.0",
1345 .data = &k3_ringacc_soc_data_sr1
1350 static int k3_ringacc_init(struct platform_device *pdev,
1351 struct k3_ringacc *ringacc)
1353 const struct soc_device_attribute *soc;
1354 void __iomem *base_fifo, *base_rt;
1355 struct device *dev = &pdev->dev;
1356 struct resource *res;
1359 dev->msi.domain = of_msi_get_domain(dev, dev->of_node,
1360 DOMAIN_BUS_TI_SCI_INTA_MSI);
1361 if (!dev->msi.domain) {
1362 dev_err(dev, "Failed to get MSI domain\n");
1363 return -EPROBE_DEFER;
1366 ret = k3_ringacc_probe_dt(ringacc);
1370 soc = soc_device_match(k3_ringacc_socinfo);
1371 if (soc && soc->data) {
1372 const struct k3_ringacc_soc_data *soc_data = soc->data;
1374 ringacc->dma_ring_reset_quirk = soc_data->dma_ring_reset_quirk;
1377 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rt");
1378 base_rt = devm_ioremap_resource(dev, res);
1379 if (IS_ERR(base_rt))
1380 return PTR_ERR(base_rt);
1382 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "fifos");
1383 base_fifo = devm_ioremap_resource(dev, res);
1384 if (IS_ERR(base_fifo))
1385 return PTR_ERR(base_fifo);
1387 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "proxy_gcfg");
1388 ringacc->proxy_gcfg = devm_ioremap_resource(dev, res);
1389 if (IS_ERR(ringacc->proxy_gcfg))
1390 return PTR_ERR(ringacc->proxy_gcfg);
1392 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
1394 ringacc->proxy_target_base = devm_ioremap_resource(dev, res);
1395 if (IS_ERR(ringacc->proxy_target_base))
1396 return PTR_ERR(ringacc->proxy_target_base);
1398 ringacc->num_proxies = readl(&ringacc->proxy_gcfg->config) &
1399 K3_RINGACC_PROXY_CFG_THREADS_MASK;
1401 ringacc->rings = devm_kzalloc(dev,
1402 sizeof(*ringacc->rings) *
1405 ringacc->rings_inuse = devm_bitmap_zalloc(dev, ringacc->num_rings,
1407 ringacc->proxy_inuse = devm_bitmap_zalloc(dev, ringacc->num_proxies,
1410 if (!ringacc->rings || !ringacc->rings_inuse || !ringacc->proxy_inuse)
1413 for (i = 0; i < ringacc->num_rings; i++) {
1414 ringacc->rings[i].rt = base_rt +
1415 K3_RINGACC_RT_REGS_STEP * i;
1416 ringacc->rings[i].fifos = base_fifo +
1417 K3_RINGACC_FIFO_REGS_STEP * i;
1418 ringacc->rings[i].parent = ringacc;
1419 ringacc->rings[i].ring_id = i;
1420 ringacc->rings[i].proxy_id = K3_RINGACC_PROXY_NOT_USED;
1423 ringacc->tisci_ring_ops = &ringacc->tisci->ops.rm_ring_ops;
1425 dev_info(dev, "Ring Accelerator probed rings:%u, gp-rings[%u,%u] sci-dev-id:%u\n",
1427 ringacc->rm_gp_range->desc[0].start,
1428 ringacc->rm_gp_range->desc[0].num,
1429 ringacc->tisci_dev_id);
1430 dev_info(dev, "dma-ring-reset-quirk: %s\n",
1431 ringacc->dma_ring_reset_quirk ? "enabled" : "disabled");
1432 dev_info(dev, "RA Proxy rev. %08x, num_proxies:%u\n",
1433 readl(&ringacc->proxy_gcfg->revision), ringacc->num_proxies);
1438 struct ringacc_match_data {
1439 struct k3_ringacc_ops ops;
1442 static struct ringacc_match_data k3_ringacc_data = {
1444 .init = k3_ringacc_init,
1448 /* Match table for of_platform binding */
1449 static const struct of_device_id k3_ringacc_of_match[] = {
1450 { .compatible = "ti,am654-navss-ringacc", .data = &k3_ringacc_data, },
1454 struct k3_ringacc *k3_ringacc_dmarings_init(struct platform_device *pdev,
1455 struct k3_ringacc_init_data *data)
1457 struct device *dev = &pdev->dev;
1458 struct k3_ringacc *ringacc;
1459 void __iomem *base_rt;
1460 struct resource *res;
1463 ringacc = devm_kzalloc(dev, sizeof(*ringacc), GFP_KERNEL);
1465 return ERR_PTR(-ENOMEM);
1468 ringacc->dma_rings = true;
1469 ringacc->num_rings = data->num_rings;
1470 ringacc->tisci = data->tisci;
1471 ringacc->tisci_dev_id = data->tisci_dev_id;
1473 mutex_init(&ringacc->req_lock);
1475 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ringrt");
1476 base_rt = devm_ioremap_resource(dev, res);
1477 if (IS_ERR(base_rt))
1478 return ERR_CAST(base_rt);
1480 ringacc->rings = devm_kzalloc(dev,
1481 sizeof(*ringacc->rings) *
1482 ringacc->num_rings * 2,
1484 ringacc->rings_inuse = devm_bitmap_zalloc(dev, ringacc->num_rings,
1487 if (!ringacc->rings || !ringacc->rings_inuse)
1488 return ERR_PTR(-ENOMEM);
1490 for (i = 0; i < ringacc->num_rings; i++) {
1491 struct k3_ring *ring = &ringacc->rings[i];
1493 ring->rt = base_rt + K3_DMARING_RT_REGS_STEP * i;
1494 ring->parent = ringacc;
1496 ring->proxy_id = K3_RINGACC_PROXY_NOT_USED;
1498 ring = &ringacc->rings[ringacc->num_rings + i];
1499 ring->rt = base_rt + K3_DMARING_RT_REGS_STEP * i +
1500 K3_DMARING_RT_REGS_REVERSE_OFS;
1501 ring->parent = ringacc;
1503 ring->proxy_id = K3_RINGACC_PROXY_NOT_USED;
1504 ring->flags = K3_RING_FLAG_REVERSE;
1507 ringacc->tisci_ring_ops = &ringacc->tisci->ops.rm_ring_ops;
1509 dev_info(dev, "Number of rings: %u\n", ringacc->num_rings);
1513 EXPORT_SYMBOL_GPL(k3_ringacc_dmarings_init);
1515 static int k3_ringacc_probe(struct platform_device *pdev)
1517 const struct ringacc_match_data *match_data;
1518 struct device *dev = &pdev->dev;
1519 struct k3_ringacc *ringacc;
1522 match_data = of_device_get_match_data(&pdev->dev);
1526 ringacc = devm_kzalloc(dev, sizeof(*ringacc), GFP_KERNEL);
1531 mutex_init(&ringacc->req_lock);
1532 ringacc->ops = &match_data->ops;
1534 ret = ringacc->ops->init(pdev, ringacc);
1538 dev_set_drvdata(dev, ringacc);
1540 mutex_lock(&k3_ringacc_list_lock);
1541 list_add_tail(&ringacc->list, &k3_ringacc_list);
1542 mutex_unlock(&k3_ringacc_list_lock);
1547 static struct platform_driver k3_ringacc_driver = {
1548 .probe = k3_ringacc_probe,
1550 .name = "k3-ringacc",
1551 .of_match_table = k3_ringacc_of_match,
1552 .suppress_bind_attrs = true,
1555 builtin_platform_driver(k3_ringacc_driver);