On Tue, 19 Dec 2017, Michael Schmitz wrote:
Contrary to the Mac driver, esp->command_block and esp->command_block_dma are not identical addresses on Amiga.
Why not make them identical, depending on the length of the tranfer? (Then choose PIO or DMA by testing for the same threshold.)
Is there a generic way to map a DMA address (i.e., physical address AFAIK) to a kernel virtual one?
I don't know of a good way to do that.
(I can use esp->command_block in the reconnect message special case but not otherwise ...)
Maybe something like this... struct esp_cmd_entry *ent = esp->active_cmd; struct esp_cmd_priv *spriv = ESP_CMD_PRIV(ent->cmd); struct scatterlist *sg = spriv->cur_sg; unsigned long addr = sg_page(sg) + sg->offset; but that doesn't work for the esp_autosense() case, which doesn't involve esp->ops->map_sg... HTH --
Cheers, Michael
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