From e82661e23c60fc41424ca138820d729d8e4a2226 Mon Sep 17 00:00:00 2001 From: Samuel Pitoiset Date: Sun, 7 Jun 2015 22:40:22 +0200 Subject: [PATCH] drm/nouveau/pm: add concept of sources A source (or multiplexer) is a tuple addr+mask+shift which allows to control a block of signals. The maximum number of sources that a signal can define is arbitrary limited to 8 and this should be large enough. This patch allows to define multi-level of sources for a signal. Each different sources are stored to a global list and will be exposed to the userspace through the nvif interface in order to avoid conflicts. Signed-off-by: Samuel Pitoiset Signed-off-by: Ben Skeggs --- .../gpu/drm/nouveau/include/nvkm/engine/pm.h | 1 + drivers/gpu/drm/nouveau/nvkm/engine/pm/base.c | 82 ++++++++++++++++++- drivers/gpu/drm/nouveau/nvkm/engine/pm/priv.h | 24 ++++++ 3 files changed, 103 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/nouveau/include/nvkm/engine/pm.h b/drivers/gpu/drm/nouveau/include/nvkm/engine/pm.h index 6c2d0578400a..130b545b4e9e 100644 --- a/drivers/gpu/drm/nouveau/include/nvkm/engine/pm.h +++ b/drivers/gpu/drm/nouveau/include/nvkm/engine/pm.h @@ -11,6 +11,7 @@ struct nvkm_pm { void *profile_data; struct list_head domains; + struct list_head sources; u32 sequence; }; diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/pm/base.c b/drivers/gpu/drm/nouveau/nvkm/engine/pm/base.c index 610c0ca5c80b..dfafefd9facf 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/pm/base.c +++ b/drivers/gpu/drm/nouveau/nvkm/engine/pm/base.c @@ -433,6 +433,67 @@ nvkm_pm_cclass = { /******************************************************************************* * PPM engine/subdev functions ******************************************************************************/ +int +nvkm_perfsrc_new(struct nvkm_pm *ppm, struct nvkm_perfsig *sig, + const struct nvkm_specsrc *spec) +{ + const struct nvkm_specsrc *ssrc; + const struct nvkm_specmux *smux; + struct nvkm_perfsrc *src; + u8 source_nr = 0; + + if (!spec) { + /* No sources are defined for this signal. */ + return 0; + } + + ssrc = spec; + while (ssrc->name) { + smux = ssrc->mux; + while (smux->name) { + bool found = false; + u8 source_id = 0; + u32 len; + + list_for_each_entry(src, &ppm->sources, head) { + if (src->addr == ssrc->addr && + src->shift == smux->shift) { + found = true; + break; + } + source_id++; + } + + if (!found) { + src = kzalloc(sizeof(*src), GFP_KERNEL); + if (!src) + return -ENOMEM; + + src->addr = ssrc->addr; + src->mask = smux->mask; + src->shift = smux->shift; + src->enable = smux->enable; + + len = strlen(ssrc->name) + + strlen(smux->name) + 2; + src->name = kzalloc(len, GFP_KERNEL); + if (!src->name) + return -ENOMEM; + snprintf(src->name, len, "%s_%s", ssrc->name, + smux->name); + + list_add_tail(&src->head, &ppm->sources); + } + + sig->source[source_nr++] = source_id + 1; + smux++; + } + ssrc++; + } + + return 0; +} + int nvkm_perfdom_new(struct nvkm_pm *ppm, const char *name, u32 mask, u32 base, u32 size_unit, u32 size_domain, @@ -441,7 +502,7 @@ nvkm_perfdom_new(struct nvkm_pm *ppm, const char *name, u32 mask, const struct nvkm_specdom *sdom; const struct nvkm_specsig *ssig; struct nvkm_perfdom *dom; - int i; + int ret, i; for (i = 0; i == 0 || mask; i++) { u32 addr = base + (i * size_unit); @@ -473,7 +534,12 @@ nvkm_perfdom_new(struct nvkm_pm *ppm, const char *name, u32 mask, ssig = (sdom++)->signal; while (ssig->name) { - dom->signal[ssig->signal].name = ssig->name; + struct nvkm_perfsig *sig = + &dom->signal[ssig->signal]; + sig->name = ssig->name; + ret = nvkm_perfsrc_new(ppm, sig, ssig->source); + if (ret) + return ret; ssig++; } @@ -504,13 +570,20 @@ void _nvkm_pm_dtor(struct nvkm_object *object) { struct nvkm_pm *ppm = (void *)object; - struct nvkm_perfdom *dom, *tmp; + struct nvkm_perfdom *dom, *next_dom; + struct nvkm_perfsrc *src, *next_src; - list_for_each_entry_safe(dom, tmp, &ppm->domains, head) { + list_for_each_entry_safe(dom, next_dom, &ppm->domains, head) { list_del(&dom->head); kfree(dom); } + list_for_each_entry_safe(src, next_src, &ppm->sources, head) { + list_del(&src->head); + kfree(src->name); + kfree(src); + } + nvkm_engine_destroy(&ppm->base); } @@ -528,5 +601,6 @@ nvkm_pm_create_(struct nvkm_object *parent, struct nvkm_object *engine, return ret; INIT_LIST_HEAD(&ppm->domains); + INIT_LIST_HEAD(&ppm->sources); return 0; } diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/pm/priv.h b/drivers/gpu/drm/nouveau/nvkm/engine/pm/priv.h index 71667fcbd9de..f954c9868594 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/pm/priv.h +++ b/drivers/gpu/drm/nouveau/nvkm/engine/pm/priv.h @@ -22,13 +22,37 @@ struct nvkm_perfctx { extern struct nvkm_oclass nvkm_pm_cclass; +struct nvkm_specmux { + u32 mask; + u8 shift; + const char *name; + bool enable; +}; + +struct nvkm_specsrc { + u32 addr; + const struct nvkm_specmux *mux; + const char *name; +}; + +struct nvkm_perfsrc { + struct list_head head; + char *name; + u32 addr; + u32 mask; + u8 shift; + bool enable; +}; + struct nvkm_specsig { u8 signal; const char *name; + const struct nvkm_specsrc *source; }; struct nvkm_perfsig { const char *name; + u8 source[8]; }; struct nvkm_specdom { -- 2.20.1