Changeset 01d5049 in mainline

Timestamp:

2024-06-11T14:56:24Z (3 months ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

master

Children:

221daa5

Parents:

c4ed9fa

Message:

PCI-IDE should correctly handle interrupt sharing

File:

• uspace/drv/block/pci-ide/pci-ide.c (modified) (5 diffs)

uspace/drv/block/pci-ide/pci-ide.c

@@ -81 +81 @@
                 .base = 0,
                 .size = sizeof(ata_cmd_t)
+        },
+        {
+                .base = 0,
+                .size = sizeof(pci_ide_regs_t)
         }
 };
@@ -86 +90 @@
 /** IDE interrupt pseudo code. */
 static const irq_cmd_t pci_ide_irq_cmds[] = {
+        /* [0] Read BMISX */
         {
                 .cmd = CMD_PIO_READ_8,
@@ -91 +96 @@
                 .dstarg = 1
         },
+        /* [1] Test BMISX.IDEINTS */
+        {
+                .cmd = CMD_AND,
+                .value = bmisx_ideints,
+                .srcarg = 1,
+                .dstarg = 2
+        },
+        /* [2] if (BMISX.IDEINTS != 0) { */
+        {
+                .cmd = CMD_PREDICATE,
+                .srcarg = 2,
+                .value = 3
+        },
+        /*
+         * [3] Clear BMISX.IDEINTS by writing 1 to it. This clears bits 6,5,
+         * but that should not matter.
+         */
+        {
+                .cmd = CMD_PIO_WRITE_8,
+                .addr = NULL,  /* will be patched in run-time */
+                .value = bmisx_ideints
+        },
+        /* [4] Read IDE status register */
+        {
+                .cmd = CMD_PIO_READ_8,
+                .addr = NULL,  /* will be patched in run-time */
+                .dstarg = 1
+        },
+        /* [5] Accept */
         {
                 .cmd = CMD_ACCEPT
-        }
+        },
+        /* [6] } else { Decline */
+        {
+                .cmd = CMD_DECLINE
+        }
+        /* } */
 };
 
@@ -329 +368 @@
         irq_pio_range_t *ranges;
         irq_cmd_t *cmds;
+        uint8_t *bmisx;
         errno_t rc;
 
@@ -344 +384 @@
         }
 
+        /* Bus master IDE status register (primary or secondary) */
+        bmisx = chan->chan_id == 0 ?
+            &chan->ctrl->bmregs->bmisp :
+            &chan->ctrl->bmregs->bmiss;
+
         memcpy(ranges, &pci_ide_irq_ranges, sizeof(pci_ide_irq_ranges));
         ranges[0].base = chan->cmd_physical;
+        ranges[1].base = chan->ctrl->bmregs_physical;
+
         memcpy(cmds, &pci_ide_irq_cmds, sizeof(pci_ide_irq_cmds));
-        cmds[0].addr = &chan->cmd->status;
+        cmds[0].addr = bmisx;
+        cmds[3].addr = bmisx;
+        cmds[4].addr = &chan->cmd->status;
 
         irq_code.rangecount = sizeof(pci_ide_irq_ranges) / sizeof(irq_pio_range_t);