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gpu: nvgpu: add function to retrieve clk points

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JIRA DNVGPU-123

Function will copy possible clock points for
a given master clock domain to pointer passed.
pointer with NULL value and count of zero can be passed
to query number of clock points for a given domain so that
memory can be allocated and function called again to
fill clock points

Change-Id: Iec6206f23789980036be99793599e934bd221035
Reviewed-on: http://git-master/r/1218912
(cherry picked from commit 9219697bff1e12deb605325055a02a7b387996e9)
Signed-off-by: Vijayakumar <vsubbu@nvidia.com>
Reviewed-on: http://git-master/r/1235055
Reviewed-by: Thomas Fleury <tfleury@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
This commit is contained in:
Vijayakumar
2016-09-12 22:36:33 +05:30
committed by Deepak Nibade
parent 1b10905120
commit 3c351f5bb2
6 changed files with 194 additions and 0 deletions
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61
drivers/gpu/nvgpu/clk/clk_prog.c
View File

@@ -30,6 +30,7 @@ static u32 devinit_get_clk_prog_table(struct gk20a *g,
struct clk_progs *pprogobjs);
static vf_flatten vfflatten_prog_1x_master;
static vf_lookup vflookup_prog_1x_master;
static get_fpoints getfpoints_prog_1x_master;
static u32 _clk_progs_pmudatainit(struct gk20a *g,
struct boardobjgrp *pboardobjgrp,
@@ -607,6 +608,9 @@ static u32 clk_prog_construct_1x_master(struct gk20a *g,
pclkprog->vflookup =
vflookup_prog_1x_master;
pclkprog->getfpoints =
getfpoints_prog_1x_master;
pclkprog->p_vf_entries = (struct ctrl_clk_clk_prog_1x_master_vf_entry *)
kzalloc(vfsize, GFP_KERNEL);
@@ -984,3 +988,60 @@ static u32 vflookup_prog_1x_master
return -EINVAL;
return 0;
}
static u32 getfpoints_prog_1x_master
(
struct gk20a *g,
struct clk_pmupstate *pclk,
struct clk_prog_1x_master *p1xmaster,
u32 *pfpointscount,
u16 **ppfreqpointsinmhz,
u8 rail
)
{
struct ctrl_clk_clk_prog_1x_master_vf_entry
*pvfentry;
struct clk_vf_point *pvfpoint;
struct clk_progs *pclkprogobjs;
u8 j;
u32 fpointscount = 0;
if (pfpointscount == NULL)
return -EINVAL;
pclkprogobjs = &(pclk->clk_progobjs);
if (pclkprogobjs->vf_entry_count >
CTRL_CLK_CLK_PROG_1X_MASTER_VF_ENTRY_MAX_ENTRIES)
return -EINVAL;
if (rail >= pclkprogobjs->vf_entry_count)
return -EINVAL;
pvfentry = p1xmaster->p_vf_entries;
pvfentry = (struct ctrl_clk_clk_prog_1x_master_vf_entry *)(
(u8 *)pvfentry +
(sizeof(struct ctrl_clk_clk_prog_1x_master_vf_entry) *
(rail+1)));
fpointscount = pvfentry->vf_point_idx_last -
pvfentry->vf_point_idx_first + 1;
/* if pointer for freq data is NULL simply return count */
if (*ppfreqpointsinmhz == NULL)
goto done;
if (fpointscount > *pfpointscount)
return -ENOMEM;
for (j = pvfentry->vf_point_idx_first;
j <= pvfentry->vf_point_idx_last; j++) {
pvfpoint = CLK_CLK_VF_POINT_GET(pclk, j);
**ppfreqpointsinmhz = clkvfpointfreqmhzget(g, pvfpoint);
(*ppfreqpointsinmhz)++;
}
done:
*pfpointscount = fpointscount;
return 0;
}