__u32 syncpt_incrs;
__u32 num_cmdbufs;
__u32 num_relocs;
+ __u32 num_waitchks;
+ __u32 waitchk_mask;
};
struct nvhost_cmdbuf {
__u32 target_offset;
};
+struct nvhost_waitchk {
+ __u32 mem;
+ __u32 offset;
+ __u32 syncpt_id;
+ __u32 thresh;
+};
+
struct nvhost_get_param_args {
__u32 value;
};
void nvmap_unpin_handles(struct nvmap_client *client,
struct nvmap_handle **h, int nr);
+int nvmap_patch_wait(struct nvmap_client *client,
+ struct nvmap_handle *patch,
+ u32 patch_offset, u32 patch_value);
+
struct nvmap_platform_carveout {
const char *name;
unsigned int usage_mask;
u32 syncpt_incrs;
u32 cmdbufs_pending;
u32 relocs_pending;
+ u32 waitchk_pending;
+ u32 waitchk_ref;
struct nvmap_handle_ref *gather_mem;
struct nvhost_op_pair *gathers;
int num_gathers;
struct nvmap_pinarray_elem pinarray[NVHOST_MAX_HANDLES];
struct nvmap_handle *unpinarray[NVHOST_MAX_HANDLES];
struct nvmap_client *nvmap;
+ struct nvhost_waitchk waitchks[NVHOST_MAX_WAIT_CHECKS];
+ u32 num_waitchks;
+ u32 waitchk_mask;
};
struct nvhost_ctrl_userctx {
{
ctx->cmdbufs_pending = 0;
ctx->relocs_pending = 0;
+ ctx->waitchk_pending = 0;
}
static ssize_t nvhost_channelwrite(struct file *filp, const char __user *buf,
while (remaining) {
size_t consumed;
- if (!priv->relocs_pending && !priv->cmdbufs_pending) {
+ if (!priv->relocs_pending && !priv->cmdbufs_pending && !priv->waitchk_pending) {
consumed = sizeof(struct nvhost_submit_hdr);
if (remaining < consumed)
break;
/* leave room for ctx switch */
priv->num_gathers = 2;
priv->pinarray_size = 0;
+ priv->waitchk_mask |= priv->waitchk_ref;
} else if (priv->cmdbufs_pending) {
struct nvhost_cmdbuf cmdbuf;
consumed = sizeof(cmdbuf);
}
priv->pinarray_size += numrelocs;
priv->relocs_pending -= numrelocs;
+ } else if (priv->waitchk_pending) {
+ struct nvhost_waitchk *waitp;
+ consumed = sizeof(struct nvhost_waitchk);
+ if (remaining < consumed)
+ break;
+ waitp = &priv->waitchks[priv->num_waitchks];
+ if (copy_from_user(waitp, buf, consumed)) {
+ err = -EFAULT;
+ break;
+ }
+ priv->num_waitchks++;
+ priv->waitchk_pending--;
} else {
err = -EFAULT;
break;
int num_unpin;
int err;
- if (ctx->relocs_pending || ctx->cmdbufs_pending) {
+ if (ctx->relocs_pending || ctx->cmdbufs_pending || ctx->waitchk_pending) {
reset_submit(ctx);
dev_err(&ctx->ch->dev->pdev->dev, "channel submit out of sync\n");
return -EFAULT;
return err;
}
+ /* remove stale waits */
+ if (ctx->num_waitchks) {
+ err = nvhost_syncpt_wait_check(ctx->nvmap,
+ &ctx->ch->dev->syncpt, ctx->waitchk_mask,
+ ctx->waitchks, ctx->num_waitchks);
+ if (err) {
+ dev_warn(&ctx->ch->dev->pdev->dev,
+ "nvhost_syncpt_wait_check failed: %d\n", err);
+ mutex_unlock(&ctx->ch->submitlock);
+ nvmap_unpin_handles(ctx->nvmap, ctx->unpinarray, num_unpin);
+ nvhost_module_idle(&ctx->ch->mod);
+ return err;
+ }
+ ctx->num_waitchks = 0;
+ ctx->waitchk_mask = 0;
+ }
+
/* context switch */
if (ctx->ch->cur_ctx != ctx->hwctx) {
struct nvhost_hwctx *hw = ctx->hwctx;
err = nvhost_ioctl_channel_flush(priv, (void *)buf);
break;
case NVHOST_IOCTL_CHANNEL_GET_SYNCPOINTS:
+ /* host syncpt ID is used by the RM (and never be given out) */
+ BUG_ON(priv->ch->desc->syncpts & (1 << NVSYNCPT_GRAPHICS_HOST));
((struct nvhost_get_param_args *)buf)->value =
priv->ch->desc->syncpts;
break;
#define NVHOST_CHANNEL_BASE 0
#define NVHOST_NUMCHANNELS (NV_HOST1X_CHANNELS - 1)
+#define NVHOST_MAX_WAIT_CHECKS 256
#define NVHOST_MAX_GATHERS 512
#define NVHOST_MAX_HANDLES 1280
NV_CLASS_HOST_INDDATA = 0x2e
};
+static inline u32 nvhost_class_host_wait_syncpt(
+ unsigned indx, unsigned threshold)
+{
+ return (indx << 24) | (threshold & 0xffffff);
+}
+
static inline u32 nvhost_class_host_wait_syncpt_base(
unsigned indx, unsigned base_indx, unsigned offset)
{
}
static const char *s_syncpt_names[32] = {
- "", "", "", "", "", "", "", "", "", "", "", "",
+ "gfx_host", "", "", "", "", "", "", "", "", "", "", "",
"vi_isp_0", "vi_isp_1", "vi_isp_2", "vi_isp_3", "vi_isp_4", "vi_isp_5",
"2d_0", "2d_1",
"", "",
}
}
+
+/* returns true, if a <= b < c using wrapping comparison */
+static inline bool nvhost_syncpt_is_between(u32 a, u32 b, u32 c)
+{
+ return b-a < c-a;
+}
+
+/* returns true, if x >= y (mod 1 << 32) */
+static bool nvhost_syncpt_wrapping_comparison(u32 x, u32 y)
+{
+ return nvhost_syncpt_is_between(y, x, (1UL<<31UL)+y);
+}
+
+/* check for old WAITs to be removed (avoiding a wrap) */
+int nvhost_syncpt_wait_check(struct nvmap_client *nvmap,
+ struct nvhost_syncpt *sp, u32 waitchk_mask,
+ struct nvhost_waitchk *waitp, u32 waitchks)
+{
+ u32 idx;
+ int err = 0;
+
+ /* get current syncpt values */
+ for (idx = 0; idx < NV_HOST1X_SYNCPT_NB_PTS; idx++) {
+ if (BIT(idx) & waitchk_mask) {
+ nvhost_syncpt_update_min(sp, idx);
+ }
+ }
+
+ BUG_ON(!waitp);
+
+ /* compare syncpt vs wait threshold */
+ while (waitchks) {
+ u32 syncpt, override;
+
+ BUG_ON(waitp->syncpt_id > NV_HOST1X_SYNCPT_NB_PTS);
+
+ syncpt = atomic_read(&sp->min_val[waitp->syncpt_id]);
+ if (nvhost_syncpt_wrapping_comparison(syncpt, waitp->thresh)) {
+
+ /* wait has completed already, so can be removed */
+ dev_dbg(&syncpt_to_dev(sp)->pdev->dev,
+ "drop WAIT id %d (%s) thresh 0x%x, syncpt 0x%x\n",
+ waitp->syncpt_id, nvhost_syncpt_name(waitp->syncpt_id),
+ waitp->thresh, syncpt);
+
+ /* move wait to a kernel reserved syncpt (that's always 0) */
+ override = nvhost_class_host_wait_syncpt(NVSYNCPT_GRAPHICS_HOST, 0);
+
+ /* patch the wait */
+ err = nvmap_patch_wait(nvmap,
+ (struct nvmap_handle *)waitp->mem,
+ waitp->offset, override);
+ if (err)
+ break;
+ }
+ waitchks--;
+ waitp++;
+ }
+ return err;
+}
#include <linux/kernel.h>
#include <linux/sched.h>
+#include <mach/nvhost.h>
+#include <mach/nvmap.h>
#include <asm/atomic.h>
#include "nvhost_hardware.h"
+#define NVSYNCPT_GRAPHICS_HOST (0)
#define NVSYNCPT_VI_ISP_0 (12)
#define NVSYNCPT_VI_ISP_1 (13)
#define NVSYNCPT_VI_ISP_2 (14)
return nvhost_syncpt_wait_timeout(sp, id, thresh, MAX_SCHEDULE_TIMEOUT);
}
+int nvhost_syncpt_wait_check(struct nvmap_client *nvmap,
+ struct nvhost_syncpt *sp, u32 mask,
+ struct nvhost_waitchk *waitp, u32 num_waits);
const char *nvhost_syncpt_name(u32 id);
{
nvmap_free_handle_id(client, nvmap_ref_to_id(r));
}
+
+/*
+ * create a mapping to the user's buffer and write it
+ * (uses similar logic from nvmap_reloc_pin_array to map the cmdbuf)
+ */
+int nvmap_patch_wait(struct nvmap_client *client,
+ struct nvmap_handle *patch,
+ u32 patch_offset, u32 patch_value)
+{
+ unsigned long phys;
+ unsigned int pfn, last_pfn = 0;
+ void *addr;
+ pte_t **pte;
+
+ if (patch_offset >= patch->size) {
+ nvmap_warn(client, "read/write outside of handle\n");
+ return -EFAULT;
+ }
+
+ pte = nvmap_alloc_pte(client->dev, &addr);
+ if (IS_ERR(pte))
+ return PTR_ERR(pte);
+
+ /* derive physaddr of cmdbuf WAIT to patch */
+ if (patch->heap_pgalloc) {
+ unsigned int page = patch_offset >> PAGE_SHIFT;
+ phys = page_to_phys(patch->pgalloc.pages[page]);
+ phys += (patch_offset & ~PAGE_MASK);
+ } else {
+ phys = patch->carveout->base + patch_offset;
+ }
+
+ pfn = __phys_to_pfn(phys);
+
+ /* write PTE, so addr points to cmdbuf PFN */
+ if (pfn != last_pfn) {
+ pgprot_t prot = nvmap_pgprot(patch, pgprot_kernel);
+ unsigned long kaddr = (unsigned long)addr;
+ set_pte_at(&init_mm, kaddr, *pte, pfn_pte(pfn, prot));
+ flush_tlb_kernel_page(kaddr);
+ last_pfn = pfn;
+ }
+
+ /* write patch_value to addr + page offset */
+ __raw_writel(patch_value, addr + (phys & ~PAGE_MASK));
+
+ nvmap_free_pte(client->dev, pte);
+ wmb();
+ return 0;
+}
projects / linux.git / commitdiff