BCAST is a hardware module to broadcast register read/write for PPs. It can also merge IRQs from different PPs into one IRQ.
Signed-off-by: Qiang Yu yuq825@gmail.com --- drivers/gpu/drm/lima/lima_bcast.c | 65 +++++++++++++++++++++++++++++++ drivers/gpu/drm/lima/lima_bcast.h | 34 ++++++++++++++++ 2 files changed, 99 insertions(+) create mode 100644 drivers/gpu/drm/lima/lima_bcast.c create mode 100644 drivers/gpu/drm/lima/lima_bcast.h
diff --git a/drivers/gpu/drm/lima/lima_bcast.c b/drivers/gpu/drm/lima/lima_bcast.c new file mode 100644 index 000000000000..32012a61ea6a --- /dev/null +++ b/drivers/gpu/drm/lima/lima_bcast.c @@ -0,0 +1,65 @@ +/* + * Copyright (C) 2017-2018 Lima Project + * + * 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. + */ + +#include <linux/io.h> +#include <linux/device.h> + +#include "lima_device.h" +#include "lima_bcast.h" +#include "lima_regs.h" + +#define bcast_write(reg, data) writel(data, ip->iomem + LIMA_BCAST_##reg) +#define bcast_read(reg) readl(ip->iomem + LIMA_BCAST_##reg) + +void lima_bcast_enable(struct lima_device *dev) +{ + struct lima_sched_pipe *pipe = dev->pipe + lima_pipe_pp; + struct lima_ip *ip = dev->ip + lima_ip_bcast; + int i, mask = 0; + + for (i = 0; i < pipe->num_processor; i++) { + struct lima_ip *pp = pipe->processor[i]; + mask |= 1 << (pp->id - lima_ip_pp0); + } + + bcast_write(BROADCAST_MASK, (mask << 16) | mask); + bcast_write(INTERRUPT_MASK, mask); +} + +void lima_bcast_disable(struct lima_device *dev) +{ + struct lima_ip *ip = dev->ip + lima_ip_bcast; + + bcast_write(BROADCAST_MASK, 0); + bcast_write(INTERRUPT_MASK, 0); +} + +int lima_bcast_init(struct lima_ip *ip) +{ + return 0; +} + +void lima_bcast_fini(struct lima_ip *ip) +{ + +} + diff --git a/drivers/gpu/drm/lima/lima_bcast.h b/drivers/gpu/drm/lima/lima_bcast.h new file mode 100644 index 000000000000..abafd4f613c7 --- /dev/null +++ b/drivers/gpu/drm/lima/lima_bcast.h @@ -0,0 +1,34 @@ +/* + * Copyright (C) 2017-2018 Lima Project + * + * 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. + */ + +#ifndef __LIMA_BCAST_H__ +#define __LIMA_BCAST_H__ + +struct lima_ip; + +int lima_bcast_init(struct lima_ip *ip); +void lima_bcast_fini(struct lima_ip *ip); + +void lima_bcast_enable(struct lima_device *dev); +void lima_bcast_disable(struct lima_device *dev); + +#endif