[deliverable/linux.git] / drivers / gpu / drm / nouveau / nvkm / subdev / bus / hwsq.c

/*
 * Copyright 2013 Red Hat Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: Ben Skeggs <bskeggs@redhat.com>
 */
#include <subdev/bus.h>

struct nvkm_hwsq {
	struct nvkm_bus *pbus;
	u32 addr;
	u32 data;
	struct {
		u8 data[512];
		u8 size;
	} c;
};

static void
hwsq_cmd(struct nvkm_hwsq *hwsq, int size, u8 data[])
{
	memcpy(&hwsq->c.data[hwsq->c.size], data, size * sizeof(data[0]));
	hwsq->c.size += size;
}

int
nvkm_hwsq_init(struct nvkm_bus *pbus, struct nvkm_hwsq **phwsq)
{
	struct nvkm_hwsq *hwsq;

	hwsq = *phwsq = kmalloc(sizeof(*hwsq), GFP_KERNEL);
	if (hwsq) {
		hwsq->pbus = pbus;
		hwsq->addr = ~0;
		hwsq->data = ~0;
		memset(hwsq->c.data, 0x7f, sizeof(hwsq->c.data));
		hwsq->c.size = 0;
	}

	return hwsq ? 0 : -ENOMEM;
}

int
nvkm_hwsq_fini(struct nvkm_hwsq **phwsq, bool exec)
{
	struct nvkm_hwsq *hwsq = *phwsq;
	int ret = 0, i;
	if (hwsq) {
		struct nvkm_bus *pbus = hwsq->pbus;
		hwsq->c.size = (hwsq->c.size + 4) / 4;
		if (hwsq->c.size <= pbus->hwsq_size) {
			if (exec)
				ret = pbus->hwsq_exec(pbus, (u32 *)hwsq->c.data,
						      hwsq->c.size);
			if (ret)
				nv_error(pbus, "hwsq exec failed: %d\n", ret);
		} else {
			nv_error(pbus, "hwsq ucode too large\n");
			ret = -ENOSPC;
		}

		for (i = 0; ret && i < hwsq->c.size; i++)
			nv_error(pbus, "\t0x%08x\n", ((u32 *)hwsq->c.data)[i]);

		*phwsq = NULL;
		kfree(hwsq);
	}
	return ret;
}

void
nvkm_hwsq_wr32(struct nvkm_hwsq *hwsq, u32 addr, u32 data)
{
	nv_debug(hwsq->pbus, "R[%06x] = 0x%08x\n", addr, data);

	if (hwsq->data != data) {
		if ((data & 0xffff0000) != (hwsq->data & 0xffff0000)) {
			hwsq_cmd(hwsq, 5, (u8[]){ 0xe2, data, data >> 8,
						  data >> 16, data >> 24 });
		} else {
			hwsq_cmd(hwsq, 3, (u8[]){ 0x42, data, data >> 8 });
		}
	}

	if ((addr & 0xffff0000) != (hwsq->addr & 0xffff0000)) {
		hwsq_cmd(hwsq, 5, (u8[]){ 0xe0, addr, addr >> 8,
					  addr >> 16, addr >> 24 });
	} else {
		hwsq_cmd(hwsq, 3, (u8[]){ 0x40, addr, addr >> 8 });
	}

	hwsq->addr = addr;
	hwsq->data = data;
}

void
nvkm_hwsq_setf(struct nvkm_hwsq *hwsq, u8 flag, int data)
{
	nv_debug(hwsq->pbus, " FLAG[%02x] = %d\n", flag, data);
	flag += 0x80;
	if (data >= 0)
		flag += 0x20;
	if (data >= 1)
		flag += 0x20;
	hwsq_cmd(hwsq, 1, (u8[]){ flag });
}

void
nvkm_hwsq_wait(struct nvkm_hwsq *hwsq, u8 flag, u8 data)
{
	nv_debug(hwsq->pbus, " WAIT[%02x] = %d\n", flag, data);
	hwsq_cmd(hwsq, 3, (u8[]){ 0x5f, flag, data });
}

void
nvkm_hwsq_nsec(struct nvkm_hwsq *hwsq, u32 nsec)
{
	u8 shift = 0, usec = nsec / 1000;
	while (usec & ~3) {
		usec >>= 2;
		shift++;
	}

	nv_debug(hwsq->pbus, "    DELAY = %d ns\n", nsec);
	hwsq_cmd(hwsq, 1, (u8[]){ 0x00 | (shift << 2) | usec });
}
Commit	Line	Data
2984506f BS	1	/*
	2	* Copyright 2013 Red Hat Inc.
	3	*
	4	* Permission is hereby granted, free of charge, to any person obtaining a
	5	* copy of this software and associated documentation files (the "Software"),
	6	* to deal in the Software without restriction, including without limitation
	7	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	8	* and/or sell copies of the Software, and to permit persons to whom the
	9	* Software is furnished to do so, subject to the following conditions:
	10	*
	11	* The above copyright notice and this permission notice shall be included in
	12	* all copies or substantial portions of the Software.
	13	*
	14	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	15	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	17	* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
	18	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	19	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	20	* OTHER DEALINGS IN THE SOFTWARE.
	21	*
	22	* Authors: Ben Skeggs <bskeggs@redhat.com>
	23	*/
2984506f BS	24	#include <subdev/bus.h>
2984506f BS	25
5f8824de BS	26	struct nvkm_hwsq {
5f8824de BS	27	struct nvkm_bus *pbus;
2984506f BS	28	u32 addr;
	29	u32 data;
	30	struct {
	31	u8 data[512];
	32	u8 size;
	33	} c;
	34	};
	35
	36	static void
5f8824de	37	hwsq_cmd(struct nvkm_hwsq *hwsq, int size, u8 data[])
2984506f BS	38	{
	39	memcpy(&hwsq->c.data[hwsq->c.size], data, size * sizeof(data[0]));
	40	hwsq->c.size += size;
	41	}
	42
	43	int
5f8824de	44	nvkm_hwsq_init(struct nvkm_bus pbus, struct nvkm_hwsq *phwsq)
2984506f	45	{
5f8824de	46	struct nvkm_hwsq *hwsq;
2984506f BS	47
	48	hwsq = phwsq = kmalloc(sizeof(hwsq), GFP_KERNEL);
	49	if (hwsq) {
	50	hwsq->pbus = pbus;
	51	hwsq->addr = ~0;
	52	hwsq->data = ~0;
	53	memset(hwsq->c.data, 0x7f, sizeof(hwsq->c.data));
	54	hwsq->c.size = 0;
	55	}
	56
	57	return hwsq ? 0 : -ENOMEM;
	58	}
	59
	60	int
5f8824de	61	nvkm_hwsq_fini(struct nvkm_hwsq **phwsq, bool exec)
2984506f	62	{
5f8824de	63	struct nvkm_hwsq hwsq = phwsq;
2984506f BS	64	int ret = 0, i;
2984506f BS	65	if (hwsq) {
5f8824de	66	struct nvkm_bus *pbus = hwsq->pbus;
2984506f BS	67	hwsq->c.size = (hwsq->c.size + 4) / 4;
	68	if (hwsq->c.size <= pbus->hwsq_size) {
	69	if (exec)
	70	ret = pbus->hwsq_exec(pbus, (u32 *)hwsq->c.data,
	71	hwsq->c.size);
	72	if (ret)
	73	nv_error(pbus, "hwsq exec failed: %d\n", ret);
	74	} else {
	75	nv_error(pbus, "hwsq ucode too large\n");
	76	ret = -ENOSPC;
	77	}
	78
	79	for (i = 0; ret && i < hwsq->c.size; i++)
	80	nv_error(pbus, "\t0x%08x\n", ((u32 *)hwsq->c.data)[i]);
	81
	82	*phwsq = NULL;
	83	kfree(hwsq);
	84	}
	85	return ret;
	86	}
	87
	88	void
5f8824de	89	nvkm_hwsq_wr32(struct nvkm_hwsq *hwsq, u32 addr, u32 data)
2984506f BS	90	{
	91	nv_debug(hwsq->pbus, "R[%06x] = 0x%08x\n", addr, data);
	92
	93	if (hwsq->data != data) {
	94	if ((data & 0xffff0000) != (hwsq->data & 0xffff0000)) {
	95	hwsq_cmd(hwsq, 5, (u8[]){ 0xe2, data, data >> 8,
	96	data >> 16, data >> 24 });
	97	} else {
	98	hwsq_cmd(hwsq, 3, (u8[]){ 0x42, data, data >> 8 });
	99	}
	100	}
	101
	102	if ((addr & 0xffff0000) != (hwsq->addr & 0xffff0000)) {
	103	hwsq_cmd(hwsq, 5, (u8[]){ 0xe0, addr, addr >> 8,
	104	addr >> 16, addr >> 24 });
	105	} else {
	106	hwsq_cmd(hwsq, 3, (u8[]){ 0x40, addr, addr >> 8 });
	107	}
	108
	109	hwsq->addr = addr;
	110	hwsq->data = data;
	111	}
	112
	113	void
5f8824de	114	nvkm_hwsq_setf(struct nvkm_hwsq *hwsq, u8 flag, int data)
2984506f BS	115	{
	116	nv_debug(hwsq->pbus, " FLAG[%02x] = %d\n", flag, data);
	117	flag += 0x80;
	118	if (data >= 0)
	119	flag += 0x20;
	120	if (data >= 1)
	121	flag += 0x20;
	122	hwsq_cmd(hwsq, 1, (u8[]){ flag });
	123	}
	124
	125	void
5f8824de	126	nvkm_hwsq_wait(struct nvkm_hwsq *hwsq, u8 flag, u8 data)
2984506f BS	127	{
	128	nv_debug(hwsq->pbus, " WAIT[%02x] = %d\n", flag, data);
	129	hwsq_cmd(hwsq, 3, (u8[]){ 0x5f, flag, data });
	130	}
	131
	132	void
5f8824de	133	nvkm_hwsq_nsec(struct nvkm_hwsq *hwsq, u32 nsec)
2984506f BS	134	{
	135	u8 shift = 0, usec = nsec / 1000;
	136	while (usec & ~3) {
	137	usec >>= 2;
	138	shift++;
	139	}
	140
	141	nv_debug(hwsq->pbus, " DELAY = %d ns\n", nsec);
	142	hwsq_cmd(hwsq, 1, (u8[]){ 0x00 \| (shift << 2) \| usec });
	143	}