cail_mc_read(9)

💖 cail_mc_read — the Kernel API Manual moment 💖

okay so bestie, welcome to cail_mc_read (that's the cail_mc_read(9) man page, we're living in section 9 now ✨). this little function's whole personality is reading an MC (Memory Controller) register and honestly? iconic. no cap. 🎀

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🌸 SYNOPSIS 🌸

uint32_t cail_mc_read (struct card_info *info , uint32_t reg );

like, that's the whole vibe. two args in, a uint32_t out. slay. 💅

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✨ ARGUMENTS ✨

• info — the atom card_info pointer 🫶 like it's literally the card info you're handing over, bestie
• reg — the MC register offset 🔥 the exact spot in the memory controller you wanna peek at

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💜 DESCRIPTION 💜

okay so what does it do: it provides an MC register accessor for the atom interpreter (r4xx+) 💫 that's the whole job description. and then — the payoff — it returns the value of the MC register. so you give it the offset, it gives you back the goods. main character energy fr fr 🌈

real talk: it's an accessor, so you're reading, not writing. if you wanted to write, that's a whole other function (peep cail_mc_write(9) below, iykyk 👀).

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🦋 SEE ALSO 🦋

so here's the squad, the whole friend group, no one left out 💖:

• Kernel file ./drivers/gpu/drm/radeon/radeon_device.c 📁
• radeon_program_register_sequence(9), radeon_surface_init(9), radeon_scratch_init(9)
• radeon_scratch_get(9), radeon_scratch_free(9)
• radeon_doorbell_init(9), radeon_doorbell_fini(9), radeon_doorbell_get(9), radeon_doorbell_free(9)
• radeon_wb_disable(9), radeon_wb_fini(9), radeon_wb_init(9)
• radeon_vram_location(9), radeon_gtt_location(9), radeon_card_posted(9)
• radeon_update_bandwidth_info(9), radeon_boot_test_post_card(9)
• radeon_dummy_page_init(9), radeon_dummy_page_fini(9)
• cail_pll_read(9), cail_pll_write(9), cail_mc_write(9) ⭐ (the write twin, go say hi)
• cail_reg_write(9), cail_reg_read(9), cail_ioreg_write(9), cail_ioreg_read(9)
• radeon_atombios_init(9), radeon_atombios_fini(9)
• radeon_combios_init(9), radeon_combios_fini(9)
• radeon_vga_set_decode(9), radeon_gart_size_auto(9), radeon_check_arguments(9)
• radeon_switcheroo_set_state(9), radeon_switcheroo_can_switch(9)
• radeon_device_init(9), radeon_device_fini(9), radeon_gpu_reset(9)

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and that's the page, bestie 🧚💜 this gem lives in ./drivers/gpu/drm/radeon and it's dated October 2026 — so yeah, it's giving future-dated main character. keep it in your bookmarks and go read some registers responsibly. mwah 💋🌸