i915/gt/intel_llc.c

1 // SPDX-License-Identifier: MIT
37 		max_khz = policy->cpuinfo.max_freq;  in cpu_max_MHz()
53 	struct drm_i915_private *i915 = llc_to_gt(llc)->i915;  in get_ia_constants()
54 	struct intel_rps *rps = &llc_to_gt(llc)->rps;  in get_ia_constants()
59 	consts->max_ia_freq = cpu_max_MHz();  in get_ia_constants()
61 	consts->min_ring_freq =  in get_ia_constants()
62 		intel_uncore_read(llc_to_gt(llc)->uncore, DCLK) & 0xf;  in get_ia_constants()
63 	/* convert DDR frequency from units of 266.6MHz to bandwidth */  in get_ia_constants()
64 	consts->min_ring_freq = mult_frac(consts->min_ring_freq, 8, 3);  in get_ia_constants()
66 	consts->min_gpu_freq = intel_rps_get_min_raw_freq(rps);  in get_ia_constants()
67 	consts->max_gpu_freq = intel_rps_get_max_raw_freq(rps);  in get_ia_constants()
78 	struct drm_i915_private *i915 = llc_to_gt(llc)->i915;  in calc_ia_freq()
79 	const int diff = consts->max_gpu_freq - gpu_freq;  in calc_ia_freq()
89 		/* max(2 * GT, DDR). NB: GT is 50MHz units */  in calc_ia_freq()
90 		ring_freq = max(consts->min_ring_freq, gpu_freq);  in calc_ia_freq()
93 		ring_freq = max(consts->min_ring_freq, ring_freq);  in calc_ia_freq()
101 		 * clock domain, so in order to boost the bandwidth  in calc_ia_freq()
110 			ia_freq = consts->max_ia_freq - diff * scale / 2;  in calc_ia_freq()
134 	 * to use for memory access.  We do this by specifying the IA frequency  in gen6_update_ring_freq()
139 	     gpu_freq--) {  in gen6_update_ring_freq()
143 		snb_pcode_write(llc_to_gt(llc)->uncore, GEN6_PCODE_WRITE_MIN_FREQ_TABLE,  in gen6_update_ring_freq()