gpu: nvgpu: add function to retrieve clk points

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>

1 files changed, 83 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/clk/clk_domain.c b/drivers/gpu/nvgpu/clk/clk_domain.c
index c8da851a..f87530dc 100644
--- a/drivers/gpu/nvgpu/clk/clk_domain.c
+++ b/drivers/gpu/nvgpu/clk/clk_domain.c
@@ -435,6 +435,19 @@ static u32 clkdomainvfsearch_stub(
         return -EINVAL;
 }
 
+static u32 clkdomaingetfpoints_stub(
+        struct gk20a *g,
+        struct clk_pmupstate *pclk,
+        struct clk_domain *pdomain,
+        u32 *pfpointscount,
+        u16 *pfreqpointsinmhz,
+        u8 rail
+)
+{
+        gk20a_dbg_info("");
+        return -EINVAL;
+}
+
 
 static u32 clk_domain_construct_super(struct gk20a *g,
                                       struct boardobj **ppboardobj,
@@ -461,6 +474,9 @@ static u32 clk_domain_construct_super(struct gk20a *g,
         pdomain->clkdomainclkvfsearch =
                         clkdomainvfsearch_stub;
 
+        pdomain->clkdomainclkgetfpoints =
+                        clkdomaingetfpoints_stub;
+
         pdomain->api_domain = ptmpdomain->api_domain;
         pdomain->domain = ptmpdomain->domain;
         pdomain->perf_domain_grp_idx =
@@ -626,6 +642,70 @@ done:
         return status;
 }
 
+static u32 clkdomaingetfpoints
+(
+        struct gk20a *g,
+        struct clk_pmupstate *pclk,
+        struct clk_domain *pdomain,
+        u32 *pfpointscount,
+        u16 *pfreqpointsinmhz,
+        u8 rail
+)
+{
+        u32 status = 0;
+        struct clk_domain_3x_master *p3xmaster  =
+                (struct clk_domain_3x_master *)pdomain;
+        struct clk_prog *pprog = NULL;
+        struct clk_prog_1x_master *pprog1xmaster = NULL;
+        u32 fpointscount = 0;
+        u32 remainingcount;
+        u32 totalcount;
+        u16 *freqpointsdata;
+        u8 i;
+
+        gk20a_dbg_info("");
+
+        if (pfpointscount == NULL)
+                return -EINVAL;
+
+        if ((pfreqpointsinmhz == NULL) && (*pfpointscount != 0))
+                return -EINVAL;
+
+        if (pdomain->super.implements(g, &pdomain->super,
+                        CTRL_CLK_CLK_DOMAIN_TYPE_3X_SLAVE))
+                return -EINVAL;
+
+        freqpointsdata = pfreqpointsinmhz;
+        totalcount = 0;
+        fpointscount = *pfpointscount;
+        remainingcount = fpointscount;
+        /* Iterate over the set of CLK_PROGs pointed at by this domain.*/
+        for (i = p3xmaster->super.clk_prog_idx_first;
+             i <= p3xmaster->super.clk_prog_idx_last;
+             i++) {
+                pprog = CLK_CLK_PROG_GET(pclk, i);
+                pprog1xmaster = (struct clk_prog_1x_master *)pprog;
+                status = pprog1xmaster->getfpoints(g, pclk, pprog1xmaster,
+                                &fpointscount, &freqpointsdata, rail);
+                if (status) {
+                        *pfpointscount = 0;
+                        goto done;
+                }
+                totalcount += fpointscount;
+                if (*pfpointscount) {
+                        remainingcount -= fpointscount;
+                        fpointscount = remainingcount;
+                } else
+                        fpointscount = 0;
+
+        }
+
+        *pfpointscount = totalcount;
+done:
+        gk20a_dbg_info("done status %x", status);
+        return status;
+}
+
 static u32 _clk_domain_pmudatainit_3x_prog(struct gk20a *g,
                                            struct boardobj *board_obj_ptr,
                                            struct nv_pmu_boardobj *ppmudata)
@@ -689,6 +769,9 @@ static u32 clk_domain_construct_3x_prog(struct gk20a *g,
         pdomain->super.super.clkdomainclkvfsearch =
                                 clkdomainvfsearch;
 
+        pdomain->super.super.clkdomainclkgetfpoints =
+                                clkdomaingetfpoints;
+
         pdomain->clk_prog_idx_first = ptmpdomain->clk_prog_idx_first;
         pdomain->clk_prog_idx_last = ptmpdomain->clk_prog_idx_last;
         pdomain->noise_unaware_ordering_index =