[deliverable/linux.git] / drivers / gpu / drm / radeon / ni_dma.c

/*
 * Copyright 2010 Advanced Micro Devices, 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: Alex Deucher
 */
#include <drm/drmP.h>
#include "radeon.h"
#include "radeon_asic.h"
#include "radeon_trace.h"
#include "nid.h"

u32 cayman_gpu_check_soft_reset(struct radeon_device *rdev);

/*
 * DMA
 * Starting with R600, the GPU has an asynchronous
 * DMA engine.  The programming model is very similar
 * to the 3D engine (ring buffer, IBs, etc.), but the
 * DMA controller has it's own packet format that is
 * different form the PM4 format used by the 3D engine.
 * It supports copying data, writing embedded data,
 * solid fills, and a number of other things.  It also
 * has support for tiling/detiling of buffers.
 * Cayman and newer support two asynchronous DMA engines.
 */

/**
 * cayman_dma_get_rptr - get the current read pointer
 *
 * @rdev: radeon_device pointer
 * @ring: radeon ring pointer
 *
 * Get the current rptr from the hardware (cayman+).
 */
uint32_t cayman_dma_get_rptr(struct radeon_device *rdev,
			     struct radeon_ring *ring)
{
	u32 rptr, reg;

	if (rdev->wb.enabled) {
		rptr = rdev->wb.wb[ring->rptr_offs/4];
	} else {
		if (ring->idx == R600_RING_TYPE_DMA_INDEX)
			reg = DMA_RB_RPTR + DMA0_REGISTER_OFFSET;
		else
			reg = DMA_RB_RPTR + DMA1_REGISTER_OFFSET;

		rptr = RREG32(reg);
	}

	return (rptr & 0x3fffc) >> 2;
}

/**
 * cayman_dma_get_wptr - get the current write pointer
 *
 * @rdev: radeon_device pointer
 * @ring: radeon ring pointer
 *
 * Get the current wptr from the hardware (cayman+).
 */
uint32_t cayman_dma_get_wptr(struct radeon_device *rdev,
			   struct radeon_ring *ring)
{
	u32 reg;

	if (ring->idx == R600_RING_TYPE_DMA_INDEX)
		reg = DMA_RB_WPTR + DMA0_REGISTER_OFFSET;
	else
		reg = DMA_RB_WPTR + DMA1_REGISTER_OFFSET;

	return (RREG32(reg) & 0x3fffc) >> 2;
}

/**
 * cayman_dma_set_wptr - commit the write pointer
 *
 * @rdev: radeon_device pointer
 * @ring: radeon ring pointer
 *
 * Write the wptr back to the hardware (cayman+).
 */
void cayman_dma_set_wptr(struct radeon_device *rdev,
			 struct radeon_ring *ring)
{
	u32 reg;

	if (ring->idx == R600_RING_TYPE_DMA_INDEX)
		reg = DMA_RB_WPTR + DMA0_REGISTER_OFFSET;
	else
		reg = DMA_RB_WPTR + DMA1_REGISTER_OFFSET;

	WREG32(reg, (ring->wptr << 2) & 0x3fffc);
}

/**
 * cayman_dma_ring_ib_execute - Schedule an IB on the DMA engine
 *
 * @rdev: radeon_device pointer
 * @ib: IB object to schedule
 *
 * Schedule an IB in the DMA ring (cayman-SI).
 */
void cayman_dma_ring_ib_execute(struct radeon_device *rdev,
				struct radeon_ib *ib)
{
	struct radeon_ring *ring = &rdev->ring[ib->ring];

	if (rdev->wb.enabled) {
		u32 next_rptr = ring->wptr + 4;
		while ((next_rptr & 7) != 5)
			next_rptr++;
		next_rptr += 3;
		radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_WRITE, 0, 0, 1));
		radeon_ring_write(ring, ring->next_rptr_gpu_addr & 0xfffffffc);
		radeon_ring_write(ring, upper_32_bits(ring->next_rptr_gpu_addr) & 0xff);
		radeon_ring_write(ring, next_rptr);
	}

	/* The indirect buffer packet must end on an 8 DW boundary in the DMA ring.
	 * Pad as necessary with NOPs.
	 */
	while ((ring->wptr & 7) != 5)
		radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_NOP, 0, 0, 0));
	radeon_ring_write(ring, DMA_IB_PACKET(DMA_PACKET_INDIRECT_BUFFER, ib->vm ? ib->vm->id : 0, 0));
	radeon_ring_write(ring, (ib->gpu_addr & 0xFFFFFFE0));
	radeon_ring_write(ring, (ib->length_dw << 12) | (upper_32_bits(ib->gpu_addr) & 0xFF));

}

/**
 * cayman_dma_stop - stop the async dma engines
 *
 * @rdev: radeon_device pointer
 *
 * Stop the async dma engines (cayman-SI).
 */
void cayman_dma_stop(struct radeon_device *rdev)
{
	u32 rb_cntl;

	if ((rdev->asic->copy.copy_ring_index == R600_RING_TYPE_DMA_INDEX) ||
	    (rdev->asic->copy.copy_ring_index == CAYMAN_RING_TYPE_DMA1_INDEX))
		radeon_ttm_set_active_vram_size(rdev, rdev->mc.visible_vram_size);

	/* dma0 */
	rb_cntl = RREG32(DMA_RB_CNTL + DMA0_REGISTER_OFFSET);
	rb_cntl &= ~DMA_RB_ENABLE;
	WREG32(DMA_RB_CNTL + DMA0_REGISTER_OFFSET, rb_cntl);

	/* dma1 */
	rb_cntl = RREG32(DMA_RB_CNTL + DMA1_REGISTER_OFFSET);
	rb_cntl &= ~DMA_RB_ENABLE;
	WREG32(DMA_RB_CNTL + DMA1_REGISTER_OFFSET, rb_cntl);

	rdev->ring[R600_RING_TYPE_DMA_INDEX].ready = false;
	rdev->ring[CAYMAN_RING_TYPE_DMA1_INDEX].ready = false;
}

/**
 * cayman_dma_resume - setup and start the async dma engines
 *
 * @rdev: radeon_device pointer
 *
 * Set up the DMA ring buffers and enable them. (cayman-SI).
 * Returns 0 for success, error for failure.
 */
int cayman_dma_resume(struct radeon_device *rdev)
{
	struct radeon_ring *ring;
	u32 rb_cntl, dma_cntl, ib_cntl;
	u32 rb_bufsz;
	u32 reg_offset, wb_offset;
	int i, r;

	/* Reset dma */
	WREG32(SRBM_SOFT_RESET, SOFT_RESET_DMA | SOFT_RESET_DMA1);
	RREG32(SRBM_SOFT_RESET);
	udelay(50);
	WREG32(SRBM_SOFT_RESET, 0);

	for (i = 0; i < 2; i++) {
		if (i == 0) {
			ring = &rdev->ring[R600_RING_TYPE_DMA_INDEX];
			reg_offset = DMA0_REGISTER_OFFSET;
			wb_offset = R600_WB_DMA_RPTR_OFFSET;
		} else {
			ring = &rdev->ring[CAYMAN_RING_TYPE_DMA1_INDEX];
			reg_offset = DMA1_REGISTER_OFFSET;
			wb_offset = CAYMAN_WB_DMA1_RPTR_OFFSET;
		}

		WREG32(DMA_SEM_INCOMPLETE_TIMER_CNTL + reg_offset, 0);
		WREG32(DMA_SEM_WAIT_FAIL_TIMER_CNTL + reg_offset, 0);

		/* Set ring buffer size in dwords */
		rb_bufsz = order_base_2(ring->ring_size / 4);
		rb_cntl = rb_bufsz << 1;
#ifdef __BIG_ENDIAN
		rb_cntl |= DMA_RB_SWAP_ENABLE | DMA_RPTR_WRITEBACK_SWAP_ENABLE;
#endif
		WREG32(DMA_RB_CNTL + reg_offset, rb_cntl);

		/* Initialize the ring buffer's read and write pointers */
		WREG32(DMA_RB_RPTR + reg_offset, 0);
		WREG32(DMA_RB_WPTR + reg_offset, 0);

		/* set the wb address whether it's enabled or not */
		WREG32(DMA_RB_RPTR_ADDR_HI + reg_offset,
		       upper_32_bits(rdev->wb.gpu_addr + wb_offset) & 0xFF);
		WREG32(DMA_RB_RPTR_ADDR_LO + reg_offset,
		       ((rdev->wb.gpu_addr + wb_offset) & 0xFFFFFFFC));

		if (rdev->wb.enabled)
			rb_cntl |= DMA_RPTR_WRITEBACK_ENABLE;

		WREG32(DMA_RB_BASE + reg_offset, ring->gpu_addr >> 8);

		/* enable DMA IBs */
		ib_cntl = DMA_IB_ENABLE | CMD_VMID_FORCE;
#ifdef __BIG_ENDIAN
		ib_cntl |= DMA_IB_SWAP_ENABLE;
#endif
		WREG32(DMA_IB_CNTL + reg_offset, ib_cntl);

		dma_cntl = RREG32(DMA_CNTL + reg_offset);
		dma_cntl &= ~CTXEMPTY_INT_ENABLE;
		WREG32(DMA_CNTL + reg_offset, dma_cntl);

		ring->wptr = 0;
		WREG32(DMA_RB_WPTR + reg_offset, ring->wptr << 2);

		WREG32(DMA_RB_CNTL + reg_offset, rb_cntl | DMA_RB_ENABLE);

		ring->ready = true;

		r = radeon_ring_test(rdev, ring->idx, ring);
		if (r) {
			ring->ready = false;
			return r;
		}
	}

	if ((rdev->asic->copy.copy_ring_index == R600_RING_TYPE_DMA_INDEX) ||
	    (rdev->asic->copy.copy_ring_index == CAYMAN_RING_TYPE_DMA1_INDEX))
		radeon_ttm_set_active_vram_size(rdev, rdev->mc.real_vram_size);

	return 0;
}

/**
 * cayman_dma_fini - tear down the async dma engines
 *
 * @rdev: radeon_device pointer
 *
 * Stop the async dma engines and free the rings (cayman-SI).
 */
void cayman_dma_fini(struct radeon_device *rdev)
{
	cayman_dma_stop(rdev);
	radeon_ring_fini(rdev, &rdev->ring[R600_RING_TYPE_DMA_INDEX]);
	radeon_ring_fini(rdev, &rdev->ring[CAYMAN_RING_TYPE_DMA1_INDEX]);
}

/**
 * cayman_dma_is_lockup - Check if the DMA engine is locked up
 *
 * @rdev: radeon_device pointer
 * @ring: radeon_ring structure holding ring information
 *
 * Check if the async DMA engine is locked up.
 * Returns true if the engine appears to be locked up, false if not.
 */
bool cayman_dma_is_lockup(struct radeon_device *rdev, struct radeon_ring *ring)
{
	u32 reset_mask = cayman_gpu_check_soft_reset(rdev);
	u32 mask;

	if (ring->idx == R600_RING_TYPE_DMA_INDEX)
		mask = RADEON_RESET_DMA;
	else
		mask = RADEON_RESET_DMA1;

	if (!(reset_mask & mask)) {
		radeon_ring_lockup_update(rdev, ring);
		return false;
	}
	return radeon_ring_test_lockup(rdev, ring);
}

/**
 * cayman_dma_vm_copy_pages - update PTEs by copying them from the GART
 *
 * @rdev: radeon_device pointer
 * @ib: indirect buffer to fill with commands
 * @pe: addr of the page entry
 * @src: src addr where to copy from
 * @count: number of page entries to update
 *
 * Update PTEs by copying them from the GART using the DMA (cayman/TN).
 */
void cayman_dma_vm_copy_pages(struct radeon_device *rdev,
			      struct radeon_ib *ib,
			      uint64_t pe, uint64_t src,
			      unsigned count)
{
	unsigned ndw;

	while (count) {
		ndw = count * 2;
		if (ndw > 0xFFFFE)
			ndw = 0xFFFFE;

		ib->ptr[ib->length_dw++] = DMA_PACKET(DMA_PACKET_COPY,
						      0, 0, ndw);
		ib->ptr[ib->length_dw++] = lower_32_bits(pe);
		ib->ptr[ib->length_dw++] = lower_32_bits(src);
		ib->ptr[ib->length_dw++] = upper_32_bits(pe) & 0xff;
		ib->ptr[ib->length_dw++] = upper_32_bits(src) & 0xff;

		pe += ndw * 4;
		src += ndw * 4;
		count -= ndw / 2;
	}
}

/**
 * cayman_dma_vm_write_pages - update PTEs by writing them manually
 *
 * @rdev: radeon_device pointer
 * @ib: indirect buffer to fill with commands
 * @pe: addr of the page entry
 * @addr: dst addr to write into pe
 * @count: number of page entries to update
 * @incr: increase next addr by incr bytes
 * @flags: hw access flags
 *
 * Update PTEs by writing them manually using the DMA (cayman/TN).
 */
void cayman_dma_vm_write_pages(struct radeon_device *rdev,
			       struct radeon_ib *ib,
			       uint64_t pe,
			       uint64_t addr, unsigned count,
			       uint32_t incr, uint32_t flags)
{
	uint64_t value;
	unsigned ndw;

	while (count) {
		ndw = count * 2;
		if (ndw > 0xFFFFE)
			ndw = 0xFFFFE;

		/* for non-physically contiguous pages (system) */
		ib->ptr[ib->length_dw++] = DMA_PACKET(DMA_PACKET_WRITE,
						      0, 0, ndw);
		ib->ptr[ib->length_dw++] = pe;
		ib->ptr[ib->length_dw++] = upper_32_bits(pe) & 0xff;
		for (; ndw > 0; ndw -= 2, --count, pe += 8) {
			if (flags & R600_PTE_SYSTEM) {
				value = radeon_vm_map_gart(rdev, addr);
				value &= 0xFFFFFFFFFFFFF000ULL;
			} else if (flags & R600_PTE_VALID) {
				value = addr;
			} else {
				value = 0;
			}
			addr += incr;
			value |= flags;
			ib->ptr[ib->length_dw++] = value;
			ib->ptr[ib->length_dw++] = upper_32_bits(value);
		}
	}
}

/**
 * cayman_dma_vm_set_pages - update the page tables using the DMA
 *
 * @rdev: radeon_device pointer
 * @ib: indirect buffer to fill with commands
 * @pe: addr of the page entry
 * @addr: dst addr to write into pe
 * @count: number of page entries to update
 * @incr: increase next addr by incr bytes
 * @flags: hw access flags
 *
 * Update the page tables using the DMA (cayman/TN).
 */
void cayman_dma_vm_set_pages(struct radeon_device *rdev,
			     struct radeon_ib *ib,
			     uint64_t pe,
			     uint64_t addr, unsigned count,
			     uint32_t incr, uint32_t flags)
{
	uint64_t value;
	unsigned ndw;

	while (count) {
		ndw = count * 2;
		if (ndw > 0xFFFFE)
			ndw = 0xFFFFE;

		if (flags & R600_PTE_VALID)
			value = addr;
		else
			value = 0;

		/* for physically contiguous pages (vram) */
		ib->ptr[ib->length_dw++] = DMA_PTE_PDE_PACKET(ndw);
		ib->ptr[ib->length_dw++] = pe; /* dst addr */
		ib->ptr[ib->length_dw++] = upper_32_bits(pe) & 0xff;
		ib->ptr[ib->length_dw++] = flags; /* mask */
		ib->ptr[ib->length_dw++] = 0;
		ib->ptr[ib->length_dw++] = value; /* value */
		ib->ptr[ib->length_dw++] = upper_32_bits(value);
		ib->ptr[ib->length_dw++] = incr; /* increment size */
		ib->ptr[ib->length_dw++] = 0;

		pe += ndw * 4;
		addr += (ndw / 2) * incr;
		count -= ndw / 2;
	}
}

/**
 * cayman_dma_vm_pad_ib - pad the IB to the required number of dw
 *
 * @ib: indirect buffer to fill with padding
 *
 */
void cayman_dma_vm_pad_ib(struct radeon_ib *ib)
{
	while (ib->length_dw & 0x7)
		ib->ptr[ib->length_dw++] = DMA_PACKET(DMA_PACKET_NOP, 0, 0, 0);
}

void cayman_dma_vm_flush(struct radeon_device *rdev, int ridx, struct radeon_vm *vm)
{
	struct radeon_ring *ring = &rdev->ring[ridx];

	if (vm == NULL)
		return;

	radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_SRBM_WRITE, 0, 0, 0));
	radeon_ring_write(ring, (0xf << 16) | ((VM_CONTEXT0_PAGE_TABLE_BASE_ADDR + (vm->id << 2)) >> 2));
	radeon_ring_write(ring, vm->pd_gpu_addr >> 12);

	/* flush hdp cache */
	radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_SRBM_WRITE, 0, 0, 0));
	radeon_ring_write(ring, (0xf << 16) | (HDP_MEM_COHERENCY_FLUSH_CNTL >> 2));
	radeon_ring_write(ring, 1);

	/* bits 0-7 are the VM contexts0-7 */
	radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_SRBM_WRITE, 0, 0, 0));
	radeon_ring_write(ring, (0xf << 16) | (VM_INVALIDATE_REQUEST >> 2));
	radeon_ring_write(ring, 1 << vm->id);
}
Commit	Line	Data
2483b4ea CK	1	/*
	2	* Copyright 2010 Advanced Micro Devices, 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: Alex Deucher
	23	*/
	24	#include <drm/drmP.h>
	25	#include "radeon.h"
	26	#include "radeon_asic.h"
74d360f6	27	#include "radeon_trace.h"
2483b4ea CK	28	#include "nid.h"
	29
	30	u32 cayman_gpu_check_soft_reset(struct radeon_device *rdev);
	31
	32	/*
	33	* DMA
	34	* Starting with R600, the GPU has an asynchronous
	35	* DMA engine. The programming model is very similar
	36	* to the 3D engine (ring buffer, IBs, etc.), but the
	37	* DMA controller has it's own packet format that is
	38	* different form the PM4 format used by the 3D engine.
	39	* It supports copying data, writing embedded data,
	40	* solid fills, and a number of other things. It also
	41	* has support for tiling/detiling of buffers.
	42	* Cayman and newer support two asynchronous DMA engines.
	43	*/
	44
ea31bf69 AD	45	/**
	46	* cayman_dma_get_rptr - get the current read pointer
	47	*
	48	* @rdev: radeon_device pointer
	49	* @ring: radeon ring pointer
	50	*
	51	* Get the current rptr from the hardware (cayman+).
	52	*/
	53	uint32_t cayman_dma_get_rptr(struct radeon_device *rdev,
	54	struct radeon_ring *ring)
	55	{
	56	u32 rptr, reg;
	57
	58	if (rdev->wb.enabled) {
	59	rptr = rdev->wb.wb[ring->rptr_offs/4];
	60	} else {
	61	if (ring->idx == R600_RING_TYPE_DMA_INDEX)
	62	reg = DMA_RB_RPTR + DMA0_REGISTER_OFFSET;
	63	else
	64	reg = DMA_RB_RPTR + DMA1_REGISTER_OFFSET;
	65
	66	rptr = RREG32(reg);
	67	}
	68
	69	return (rptr & 0x3fffc) >> 2;
	70	}
	71
	72	/**
	73	* cayman_dma_get_wptr - get the current write pointer
	74	*
	75	* @rdev: radeon_device pointer
	76	* @ring: radeon ring pointer
	77	*
	78	* Get the current wptr from the hardware (cayman+).
	79	*/
	80	uint32_t cayman_dma_get_wptr(struct radeon_device *rdev,
	81	struct radeon_ring *ring)
	82	{
	83	u32 reg;
	84
	85	if (ring->idx == R600_RING_TYPE_DMA_INDEX)
	86	reg = DMA_RB_WPTR + DMA0_REGISTER_OFFSET;
	87	else
	88	reg = DMA_RB_WPTR + DMA1_REGISTER_OFFSET;
	89
	90	return (RREG32(reg) & 0x3fffc) >> 2;
	91	}
	92
	93	/**
	94	* cayman_dma_set_wptr - commit the write pointer
	95	*
	96	* @rdev: radeon_device pointer
	97	* @ring: radeon ring pointer
	98	*
	99	* Write the wptr back to the hardware (cayman+).
	100	*/
	101	void cayman_dma_set_wptr(struct radeon_device *rdev,
	102	struct radeon_ring *ring)
	103	{
	104	u32 reg;
	105
	106	if (ring->idx == R600_RING_TYPE_DMA_INDEX)
	107	reg = DMA_RB_WPTR + DMA0_REGISTER_OFFSET;
	108	else
109	reg = DMA_RB_WPTR + DMA1_REGISTER_OFFSET;
110
111	WREG32(reg, (ring->wptr << 2) & 0x3fffc);
112	}
113
2483b4ea CK	114	/**
	115	* cayman_dma_ring_ib_execute - Schedule an IB on the DMA engine
	116	*
	117	* @rdev: radeon_device pointer
	118	* @ib: IB object to schedule
	119	*
	120	* Schedule an IB in the DMA ring (cayman-SI).
	121	*/
	122	void cayman_dma_ring_ib_execute(struct radeon_device *rdev,
	123	struct radeon_ib *ib)
	124	{
	125	struct radeon_ring *ring = &rdev->ring[ib->ring];
	126
	127	if (rdev->wb.enabled) {
	128	u32 next_rptr = ring->wptr + 4;
	129	while ((next_rptr & 7) != 5)
	130	next_rptr++;
	131	next_rptr += 3;
	132	radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_WRITE, 0, 0, 1));
	133	radeon_ring_write(ring, ring->next_rptr_gpu_addr & 0xfffffffc);
	134	radeon_ring_write(ring, upper_32_bits(ring->next_rptr_gpu_addr) & 0xff);
	135	radeon_ring_write(ring, next_rptr);
	136	}
	137
	138	/* The indirect buffer packet must end on an 8 DW boundary in the DMA ring.
	139	* Pad as necessary with NOPs.
	140	*/
	141	while ((ring->wptr & 7) != 5)
	142	radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_NOP, 0, 0, 0));
	143	radeon_ring_write(ring, DMA_IB_PACKET(DMA_PACKET_INDIRECT_BUFFER, ib->vm ? ib->vm->id : 0, 0));
	144	radeon_ring_write(ring, (ib->gpu_addr & 0xFFFFFFE0));
	145	radeon_ring_write(ring, (ib->length_dw << 12) \| (upper_32_bits(ib->gpu_addr) & 0xFF));
	146
	147	}
	148
	149	/**
	150	* cayman_dma_stop - stop the async dma engines
	151	*
	152	* @rdev: radeon_device pointer
	153	*
	154	* Stop the async dma engines (cayman-SI).
	155	*/
	156	void cayman_dma_stop(struct radeon_device *rdev)
	157	{
	158	u32 rb_cntl;
	159
50efa51a AD	160	if ((rdev->asic->copy.copy_ring_index == R600_RING_TYPE_DMA_INDEX) \|\|
	161	(rdev->asic->copy.copy_ring_index == CAYMAN_RING_TYPE_DMA1_INDEX))
	162	radeon_ttm_set_active_vram_size(rdev, rdev->mc.visible_vram_size);
2483b4ea CK	163
	164	/* dma0 */
	165	rb_cntl = RREG32(DMA_RB_CNTL + DMA0_REGISTER_OFFSET);
	166	rb_cntl &= ~DMA_RB_ENABLE;
	167	WREG32(DMA_RB_CNTL + DMA0_REGISTER_OFFSET, rb_cntl);
	168
	169	/* dma1 */
	170	rb_cntl = RREG32(DMA_RB_CNTL + DMA1_REGISTER_OFFSET);
	171	rb_cntl &= ~DMA_RB_ENABLE;
	172	WREG32(DMA_RB_CNTL + DMA1_REGISTER_OFFSET, rb_cntl);
	173
	174	rdev->ring[R600_RING_TYPE_DMA_INDEX].ready = false;
	175	rdev->ring[CAYMAN_RING_TYPE_DMA1_INDEX].ready = false;
	176	}
	177
	178	/**
	179	* cayman_dma_resume - setup and start the async dma engines
	180	*
	181	* @rdev: radeon_device pointer
	182	*
	183	* Set up the DMA ring buffers and enable them. (cayman-SI).
	184	* Returns 0 for success, error for failure.
	185	*/
	186	int cayman_dma_resume(struct radeon_device *rdev)
	187	{
	188	struct radeon_ring *ring;
	189	u32 rb_cntl, dma_cntl, ib_cntl;
	190	u32 rb_bufsz;
	191	u32 reg_offset, wb_offset;
	192	int i, r;
	193
	194	/* Reset dma */
	195	WREG32(SRBM_SOFT_RESET, SOFT_RESET_DMA \| SOFT_RESET_DMA1);
	196	RREG32(SRBM_SOFT_RESET);
	197	udelay(50);
	198	WREG32(SRBM_SOFT_RESET, 0);
	199
	200	for (i = 0; i < 2; i++) {
	201	if (i == 0) {
	202	ring = &rdev->ring[R600_RING_TYPE_DMA_INDEX];
	203	reg_offset = DMA0_REGISTER_OFFSET;
	204	wb_offset = R600_WB_DMA_RPTR_OFFSET;
	205	} else {
	206	ring = &rdev->ring[CAYMAN_RING_TYPE_DMA1_INDEX];
	207	reg_offset = DMA1_REGISTER_OFFSET;
	208	wb_offset = CAYMAN_WB_DMA1_RPTR_OFFSET;
	209	}
	210
	211	WREG32(DMA_SEM_INCOMPLETE_TIMER_CNTL + reg_offset, 0);
	212	WREG32(DMA_SEM_WAIT_FAIL_TIMER_CNTL + reg_offset, 0);
	213
	214	/* Set ring buffer size in dwords */
9c725e5b	215	rb_bufsz = order_base_2(ring->ring_size / 4);
2483b4ea CK	216	rb_cntl = rb_bufsz << 1;
	217	#ifdef __BIG_ENDIAN
	218	rb_cntl \|= DMA_RB_SWAP_ENABLE \| DMA_RPTR_WRITEBACK_SWAP_ENABLE;
	219	#endif
	220	WREG32(DMA_RB_CNTL + reg_offset, rb_cntl);
	221
	222	/* Initialize the ring buffer's read and write pointers */
	223	WREG32(DMA_RB_RPTR + reg_offset, 0);
	224	WREG32(DMA_RB_WPTR + reg_offset, 0);
	225
	226	/* set the wb address whether it's enabled or not */
	227	WREG32(DMA_RB_RPTR_ADDR_HI + reg_offset,
	228	upper_32_bits(rdev->wb.gpu_addr + wb_offset) & 0xFF);
	229	WREG32(DMA_RB_RPTR_ADDR_LO + reg_offset,
	230	((rdev->wb.gpu_addr + wb_offset) & 0xFFFFFFFC));
	231
	232	if (rdev->wb.enabled)
	233	rb_cntl \|= DMA_RPTR_WRITEBACK_ENABLE;
	234
	235	WREG32(DMA_RB_BASE + reg_offset, ring->gpu_addr >> 8);
	236
	237	/* enable DMA IBs */
	238	ib_cntl = DMA_IB_ENABLE \| CMD_VMID_FORCE;
	239	#ifdef __BIG_ENDIAN
	240	ib_cntl \|= DMA_IB_SWAP_ENABLE;
	241	#endif
	242	WREG32(DMA_IB_CNTL + reg_offset, ib_cntl);
	243
	244	dma_cntl = RREG32(DMA_CNTL + reg_offset);
	245	dma_cntl &= ~CTXEMPTY_INT_ENABLE;
	246	WREG32(DMA_CNTL + reg_offset, dma_cntl);
	247
	248	ring->wptr = 0;
	249	WREG32(DMA_RB_WPTR + reg_offset, ring->wptr << 2);
	250
2483b4ea CK	251	WREG32(DMA_RB_CNTL + reg_offset, rb_cntl \| DMA_RB_ENABLE);
	252
	253	ring->ready = true;
	254
	255	r = radeon_ring_test(rdev, ring->idx, ring);
	256	if (r) {
	257	ring->ready = false;
	258	return r;
	259	}
	260	}
	261
50efa51a AD	262	if ((rdev->asic->copy.copy_ring_index == R600_RING_TYPE_DMA_INDEX) \|\|
	263	(rdev->asic->copy.copy_ring_index == CAYMAN_RING_TYPE_DMA1_INDEX))
	264	radeon_ttm_set_active_vram_size(rdev, rdev->mc.real_vram_size);
2483b4ea CK	265
	266	return 0;
	267	}
	268
	269	/**
	270	* cayman_dma_fini - tear down the async dma engines
	271	*
	272	* @rdev: radeon_device pointer
	273	*
	274	* Stop the async dma engines and free the rings (cayman-SI).
	275	*/
	276	void cayman_dma_fini(struct radeon_device *rdev)
	277	{
	278	cayman_dma_stop(rdev);
	279	radeon_ring_fini(rdev, &rdev->ring[R600_RING_TYPE_DMA_INDEX]);
	280	radeon_ring_fini(rdev, &rdev->ring[CAYMAN_RING_TYPE_DMA1_INDEX]);
	281	}
	282
	283	/**
	284	* cayman_dma_is_lockup - Check if the DMA engine is locked up
	285	*
	286	* @rdev: radeon_device pointer
	287	* @ring: radeon_ring structure holding ring information
	288	*
	289	* Check if the async DMA engine is locked up.
	290	* Returns true if the engine appears to be locked up, false if not.
	291	*/
	292	bool cayman_dma_is_lockup(struct radeon_device rdev, struct radeon_ring ring)
	293	{
	294	u32 reset_mask = cayman_gpu_check_soft_reset(rdev);
	295	u32 mask;
	296
	297	if (ring->idx == R600_RING_TYPE_DMA_INDEX)
	298	mask = RADEON_RESET_DMA;
	299	else
	300	mask = RADEON_RESET_DMA1;
	301
	302	if (!(reset_mask & mask)) {
ff212f25	303	radeon_ring_lockup_update(rdev, ring);
2483b4ea CK	304	return false;
2483b4ea CK	305	}
2483b4ea CK	306	return radeon_ring_test_lockup(rdev, ring);
	307	}
	308
	309	/**
03f62abd CK	310	* cayman_dma_vm_copy_pages - update PTEs by copying them from the GART
	311	*
	312	* @rdev: radeon_device pointer
	313	* @ib: indirect buffer to fill with commands
	314	* @pe: addr of the page entry
	315	* @src: src addr where to copy from
	316	* @count: number of page entries to update
	317	*
	318	* Update PTEs by copying them from the GART using the DMA (cayman/TN).
	319	*/
	320	void cayman_dma_vm_copy_pages(struct radeon_device *rdev,
	321	struct radeon_ib *ib,
	322	uint64_t pe, uint64_t src,
	323	unsigned count)
	324	{
	325	unsigned ndw;
	326
	327	while (count) {
	328	ndw = count * 2;
	329	if (ndw > 0xFFFFE)
	330	ndw = 0xFFFFE;
	331
	332	ib->ptr[ib->length_dw++] = DMA_PACKET(DMA_PACKET_COPY,
	333	0, 0, ndw);
	334	ib->ptr[ib->length_dw++] = lower_32_bits(pe);
	335	ib->ptr[ib->length_dw++] = lower_32_bits(src);
	336	ib->ptr[ib->length_dw++] = upper_32_bits(pe) & 0xff;
	337	ib->ptr[ib->length_dw++] = upper_32_bits(src) & 0xff;
	338
	339	pe += ndw * 4;
	340	src += ndw * 4;
	341	count -= ndw / 2;
	342	}
	343	}
	344
	345	/**
	346	* cayman_dma_vm_write_pages - update PTEs by writing them manually
2483b4ea CK	347	*
	348	* @rdev: radeon_device pointer
	349	* @ib: indirect buffer to fill with commands
	350	* @pe: addr of the page entry
	351	* @addr: dst addr to write into pe
	352	* @count: number of page entries to update
	353	* @incr: increase next addr by incr bytes
03f62abd	354	* @flags: hw access flags
2483b4ea	355	*
03f62abd	356	* Update PTEs by writing them manually using the DMA (cayman/TN).
2483b4ea	357	*/
03f62abd CK	358	void cayman_dma_vm_write_pages(struct radeon_device *rdev,
	359	struct radeon_ib *ib,
	360	uint64_t pe,
	361	uint64_t addr, unsigned count,
	362	uint32_t incr, uint32_t flags)
2483b4ea	363	{
2483b4ea CK	364	uint64_t value;
	365	unsigned ndw;
	366
03f62abd CK	367	while (count) {
	368	ndw = count * 2;
	369	if (ndw > 0xFFFFE)
	370	ndw = 0xFFFFE;
	371
	372	/* for non-physically contiguous pages (system) */
	373	ib->ptr[ib->length_dw++] = DMA_PACKET(DMA_PACKET_WRITE,
	374	0, 0, ndw);
	375	ib->ptr[ib->length_dw++] = pe;
	376	ib->ptr[ib->length_dw++] = upper_32_bits(pe) & 0xff;
	377	for (; ndw > 0; ndw -= 2, --count, pe += 8) {
	378	if (flags & R600_PTE_SYSTEM) {
	379	value = radeon_vm_map_gart(rdev, addr);
	380	value &= 0xFFFFFFFFFFFFF000ULL;
	381	} else if (flags & R600_PTE_VALID) {
2483b4ea	382	value = addr;
03f62abd	383	} else {
2483b4ea	384	value = 0;
03f62abd CK	385	}
	386	addr += incr;
	387	value \|= flags;
	388	ib->ptr[ib->length_dw++] = value;
2483b4ea	389	ib->ptr[ib->length_dw++] = upper_32_bits(value);
2483b4ea CK	390	}
2483b4ea CK	391	}
03f62abd CK	392	}
	393
	394	/**
	395	* cayman_dma_vm_set_pages - update the page tables using the DMA
	396	*
	397	* @rdev: radeon_device pointer
	398	* @ib: indirect buffer to fill with commands
	399	* @pe: addr of the page entry
	400	* @addr: dst addr to write into pe
	401	* @count: number of page entries to update
	402	* @incr: increase next addr by incr bytes
	403	* @flags: hw access flags
	404	*
	405	* Update the page tables using the DMA (cayman/TN).
	406	*/
	407	void cayman_dma_vm_set_pages(struct radeon_device *rdev,
	408	struct radeon_ib *ib,
	409	uint64_t pe,
	410	uint64_t addr, unsigned count,
	411	uint32_t incr, uint32_t flags)
	412	{
	413	uint64_t value;
	414	unsigned ndw;
	415
	416	while (count) {
	417	ndw = count * 2;
	418	if (ndw > 0xFFFFE)
	419	ndw = 0xFFFFE;
	420
	421	if (flags & R600_PTE_VALID)
	422	value = addr;
	423	else
	424	value = 0;
	425
	426	/* for physically contiguous pages (vram) */
	427	ib->ptr[ib->length_dw++] = DMA_PTE_PDE_PACKET(ndw);
	428	ib->ptr[ib->length_dw++] = pe; /* dst addr */
	429	ib->ptr[ib->length_dw++] = upper_32_bits(pe) & 0xff;
	430	ib->ptr[ib->length_dw++] = flags; /* mask */
	431	ib->ptr[ib->length_dw++] = 0;
	432	ib->ptr[ib->length_dw++] = value; /* value */
	433	ib->ptr[ib->length_dw++] = upper_32_bits(value);
	434	ib->ptr[ib->length_dw++] = incr; /* increment size */
	435	ib->ptr[ib->length_dw++] = 0;
	436
	437	pe += ndw * 4;
	438	addr += (ndw / 2) * incr;
	439	count -= ndw / 2;
	440	}
	441	}
	442
	443	/**
	444	* cayman_dma_vm_pad_ib - pad the IB to the required number of dw
	445	*
	446	* @ib: indirect buffer to fill with padding
	447	*
	448	*/
	449	void cayman_dma_vm_pad_ib(struct radeon_ib *ib)
	450	{
2483b4ea CK	451	while (ib->length_dw & 0x7)
	452	ib->ptr[ib->length_dw++] = DMA_PACKET(DMA_PACKET_NOP, 0, 0, 0);
	453	}
	454
	455	void cayman_dma_vm_flush(struct radeon_device rdev, int ridx, struct radeon_vm vm)
	456	{
	457	struct radeon_ring *ring = &rdev->ring[ridx];
	458
	459	if (vm == NULL)
	460	return;
	461
	462	radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_SRBM_WRITE, 0, 0, 0));
	463	radeon_ring_write(ring, (0xf << 16) \| ((VM_CONTEXT0_PAGE_TABLE_BASE_ADDR + (vm->id << 2)) >> 2));
	464	radeon_ring_write(ring, vm->pd_gpu_addr >> 12);
	465
	466	/* flush hdp cache */
	467	radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_SRBM_WRITE, 0, 0, 0));
	468	radeon_ring_write(ring, (0xf << 16) \| (HDP_MEM_COHERENCY_FLUSH_CNTL >> 2));
	469	radeon_ring_write(ring, 1);
	470
	471	/* bits 0-7 are the VM contexts0-7 */
	472	radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_SRBM_WRITE, 0, 0, 0));
	473	radeon_ring_write(ring, (0xf << 16) \| (VM_INVALIDATE_REQUEST >> 2));
	474	radeon_ring_write(ring, 1 << vm->id);
	475	}
	476