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This commit is contained in:
Bernhard Stoeckner
2023-07-31 18:16:23 +02:00
parent 337e28efda
commit 29f830f1bb
14 changed files with 61 additions and 175 deletions
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10
kernel-open/nvidia-uvm/uvm_channel.c
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@@ -2703,7 +2703,15 @@ static void init_channel_manager_conf(uvm_channel_manager_t *manager)
// access through the bus, because no cache coherence message is exchanged.
if (uvm_gpu_is_coherent(gpu->parent)) {
manager->conf.gpfifo_loc = UVM_BUFFER_LOCATION_SYS;
manager->conf.gpput_loc = UVM_BUFFER_LOCATION_SYS;
// On GPUs with limited ESCHED addressing range, e.g., Volta on P9, RM
// cannot guarantee that USERD/GPPUT physical address is accessible by
// ESCHED. We set GPPUT location to vidmem where physical addresses are
// all accessible by ESCHED. We use the max_host_va as a proxy for the
// PA limitation, since all architectures with 40b VA limits also have
// 40b PA limits.
manager->conf.gpput_loc = gpu->parent->max_host_va == (1ull << 40) ? UVM_BUFFER_LOCATION_VID :
UVM_BUFFER_LOCATION_SYS;
}
else {
// By default we place GPFIFO and GPPUT on vidmem as it potentially has