}
/*
- * * Free and unmap PCI Resource
- * */
+ * Free and unmap PCI Resource
+ */
static void ca91cx42_free_resource(struct vme_master_resource *image)
{
iounmap(image->kern_base);
return retval;
}
+int ca91cx42_dma_list_add(struct vme_dma_list *list, struct vme_dma_attr *src,
+ struct vme_dma_attr *dest, size_t count)
+{
+ struct ca91cx42_dma_entry *entry, *prev;
+ struct vme_dma_pci *pci_attr;
+ struct vme_dma_vme *vme_attr;
+ dma_addr_t desc_ptr;
+ int retval = 0;
+
+ /* XXX descriptor must be aligned on 64-bit boundaries */
+ entry = (struct ca91cx42_dma_entry *)
+ kmalloc(sizeof(struct ca91cx42_dma_entry), GFP_KERNEL);
+ if (entry == NULL) {
+ printk(KERN_ERR "Failed to allocate memory for dma resource "
+ "structure\n");
+ retval = -ENOMEM;
+ goto err_mem;
+ }
+
+ /* Test descriptor alignment */
+ if ((unsigned long)&(entry->descriptor) & CA91CX42_DCPP_M) {
+ printk("Descriptor not aligned to 16 byte boundary as "
+ "required: %p\n", &(entry->descriptor));
+ retval = -EINVAL;
+ goto err_align;
+ }
+
+ memset(&(entry->descriptor), 0, sizeof(struct ca91cx42_dma_descriptor));
+
+ if (dest->type == VME_DMA_VME) {
+ entry->descriptor.dctl |= CA91CX42_DCTL_L2V;
+ vme_attr = (struct vme_dma_vme *)dest->private;
+ pci_attr = (struct vme_dma_pci *)src->private;
+ } else {
+ vme_attr = (struct vme_dma_vme *)src->private;
+ pci_attr = (struct vme_dma_pci *)dest->private;
+ }
+
+ /* Check we can do fullfill required attributes */
+ if ((vme_attr->aspace & ~(VME_A16 | VME_A24 | VME_A32 | VME_USER1 |
+ VME_USER2)) != 0) {
+
+ printk(KERN_ERR "Unsupported cycle type\n");
+ retval = -EINVAL;
+ goto err_aspace;
+ }
+
+ if ((vme_attr->cycle & ~(VME_SCT | VME_BLT | VME_SUPER | VME_USER |
+ VME_PROG | VME_DATA)) != 0) {
+
+ printk(KERN_ERR "Unsupported cycle type\n");
+ retval = -EINVAL;
+ goto err_cycle;
+ }
+
+ /* Check to see if we can fullfill source and destination */
+ if (!(((src->type == VME_DMA_PCI) && (dest->type == VME_DMA_VME)) ||
+ ((src->type == VME_DMA_VME) && (dest->type == VME_DMA_PCI)))) {
+
+ printk(KERN_ERR "Cannot perform transfer with this "
+ "source-destination combination\n");
+ retval = -EINVAL;
+ goto err_direct;
+ }
+
+ /* Setup cycle types */
+ if (vme_attr->cycle & VME_BLT)
+ entry->descriptor.dctl |= CA91CX42_DCTL_VCT_BLT;
+
+ /* Setup data width */
+ switch (vme_attr->dwidth) {
+ case VME_D8:
+ entry->descriptor.dctl |= CA91CX42_DCTL_VDW_D8;
+ break;
+ case VME_D16:
+ entry->descriptor.dctl |= CA91CX42_DCTL_VDW_D16;
+ break;
+ case VME_D32:
+ entry->descriptor.dctl |= CA91CX42_DCTL_VDW_D32;
+ break;
+ case VME_D64:
+ entry->descriptor.dctl |= CA91CX42_DCTL_VDW_D64;
+ break;
+ default:
+ printk(KERN_ERR "Invalid data width\n");
+ return -EINVAL;
+ }
+
+ /* Setup address space */
+ switch (vme_attr->aspace) {
+ case VME_A16:
+ entry->descriptor.dctl |= CA91CX42_DCTL_VAS_A16;
+ break;
+ case VME_A24:
+ entry->descriptor.dctl |= CA91CX42_DCTL_VAS_A24;
+ break;
+ case VME_A32:
+ entry->descriptor.dctl |= CA91CX42_DCTL_VAS_A32;
+ break;
+ case VME_USER1:
+ entry->descriptor.dctl |= CA91CX42_DCTL_VAS_USER1;
+ break;
+ case VME_USER2:
+ entry->descriptor.dctl |= CA91CX42_DCTL_VAS_USER2;
+ break;
+ default:
+ printk(KERN_ERR "Invalid address space\n");
+ return -EINVAL;
+ break;
+ }
+
+ if (vme_attr->cycle & VME_SUPER)
+ entry->descriptor.dctl |= CA91CX42_DCTL_SUPER_SUPR;
+ if (vme_attr->cycle & VME_PROG)
+ entry->descriptor.dctl |= CA91CX42_DCTL_PGM_PGM;
+
+ entry->descriptor.dtbc = count;
+ entry->descriptor.dla = pci_attr->address;
+ entry->descriptor.dva = vme_attr->address;
+ entry->descriptor.dcpp = CA91CX42_DCPP_NULL;
+
+ /* Add to list */
+ list_add_tail(&(entry->list), &(list->entries));
+
+ /* Fill out previous descriptors "Next Address" */
+ if (entry->list.prev != &(list->entries)) {
+ prev = list_entry(entry->list.prev, struct ca91cx42_dma_entry,
+ list);
+ /* We need the bus address for the pointer */
+ desc_ptr = virt_to_bus(&(entry->descriptor));
+ prev->descriptor.dcpp = desc_ptr & ~CA91CX42_DCPP_M;
+ }
+
+ return 0;
+
+err_cycle:
+err_aspace:
+err_direct:
+err_align:
+ kfree(entry);
+err_mem:
+ return retval;
+}
+
+static int ca91cx42_dma_busy(struct vme_bridge *ca91cx42_bridge)
+{
+ u32 tmp;
+ struct ca91cx42_driver *bridge;
+
+ bridge = ca91cx42_bridge->driver_priv;
+
+ tmp = ioread32(bridge->base + DGCS);
+
+ if (tmp & CA91CX42_DGCS_ACT)
+ return 0;
+ else
+ return 1;
+}
+
+int ca91cx42_dma_list_exec(struct vme_dma_list *list)
+{
+ struct vme_dma_resource *ctrlr;
+ struct ca91cx42_dma_entry *entry;
+ int retval = 0;
+ dma_addr_t bus_addr;
+ u32 val;
+
+ struct ca91cx42_driver *bridge;
+
+ ctrlr = list->parent;
+
+ bridge = ctrlr->parent->driver_priv;
+
+ mutex_lock(&(ctrlr->mtx));
+
+ if (!(list_empty(&(ctrlr->running)))) {
+ /*
+ * XXX We have an active DMA transfer and currently haven't
+ * sorted out the mechanism for "pending" DMA transfers.
+ * Return busy.
+ */
+ /* Need to add to pending here */
+ mutex_unlock(&(ctrlr->mtx));
+ return -EBUSY;
+ } else {
+ list_add(&(list->list), &(ctrlr->running));
+ }
+
+ /* Get first bus address and write into registers */
+ entry = list_first_entry(&(list->entries), struct ca91cx42_dma_entry,
+ list);
+
+ bus_addr = virt_to_bus(&(entry->descriptor));
+
+ mutex_unlock(&(ctrlr->mtx));
+
+ iowrite32(0, bridge->base + DTBC);
+ iowrite32(bus_addr & ~CA91CX42_DCPP_M, bridge->base + DCPP);
+
+ /* Start the operation */
+ val = ioread32(bridge->base + DGCS);
+
+ /* XXX Could set VMEbus On and Off Counters here */
+ val &= (CA91CX42_DGCS_VON_M | CA91CX42_DGCS_VOFF_M);
+
+ val |= (CA91CX42_DGCS_CHAIN | CA91CX42_DGCS_STOP | CA91CX42_DGCS_HALT |
+ CA91CX42_DGCS_DONE | CA91CX42_DGCS_LERR | CA91CX42_DGCS_VERR |
+ CA91CX42_DGCS_PERR);
+
+ iowrite32(val, bridge->base + DGCS);
+
+ val |= CA91CX42_DGCS_GO;
+
+ iowrite32(val, bridge->base + DGCS);
+
+ wait_event_interruptible(bridge->dma_queue,
+ ca91cx42_dma_busy(ctrlr->parent));
+
+ /*
+ * Read status register, this register is valid until we kick off a
+ * new transfer.
+ */
+ val = ioread32(bridge->base + DGCS);
+
+ if (val & (CA91CX42_DGCS_LERR | CA91CX42_DGCS_VERR |
+ CA91CX42_DGCS_PERR)) {
+
+ printk(KERN_ERR "ca91c042: DMA Error. DGCS=%08X\n", val);
+ val = ioread32(bridge->base + DCTL);
+ }
+
+ /* Remove list from running list */
+ mutex_lock(&(ctrlr->mtx));
+ list_del(&(list->list));
+ mutex_unlock(&(ctrlr->mtx));
+
+ return retval;
+
+}
+
+int ca91cx42_dma_list_empty(struct vme_dma_list *list)
+{
+ struct list_head *pos, *temp;
+ struct ca91cx42_dma_entry *entry;
+
+ /* detach and free each entry */
+ list_for_each_safe(pos, temp, &(list->entries)) {
+ list_del(pos);
+ entry = list_entry(pos, struct ca91cx42_dma_entry, list);
+ kfree(entry);
+ }
+
+ return 0;
+}
+
/*
* All 4 location monitors reside at the same base - this is therefore a
* system wide configuration.
struct ca91cx42_driver *ca91cx42_device;
struct vme_master_resource *master_image;
struct vme_slave_resource *slave_image;
-#if 0
struct vme_dma_resource *dma_ctrlr;
-#endif
struct vme_lm_resource *lm;
/* We want to support more than one of each bridge so we need to
list_add_tail(&(slave_image->list),
&(ca91cx42_bridge->slave_resources));
}
-#if 0
+
/* Add dma engines to list */
INIT_LIST_HEAD(&(ca91cx42_bridge->dma_resources));
for (i = 0; i < CA91C142_MAX_DMA; i++) {
list_add_tail(&(dma_ctrlr->list),
&(ca91cx42_bridge->dma_resources));
}
-#endif
+
/* Add location monitor to list */
INIT_LIST_HEAD(&(ca91cx42_bridge->lm_resources));
lm = kmalloc(sizeof(struct vme_lm_resource), GFP_KERNEL);
ca91cx42_bridge->master_write = ca91cx42_master_write;
#if 0
ca91cx42_bridge->master_rmw = ca91cx42_master_rmw;
+#endif
ca91cx42_bridge->dma_list_add = ca91cx42_dma_list_add;
ca91cx42_bridge->dma_list_exec = ca91cx42_dma_list_exec;
ca91cx42_bridge->dma_list_empty = ca91cx42_dma_list_empty;
-#endif
ca91cx42_bridge->irq_set = ca91cx42_irq_set;
ca91cx42_bridge->irq_generate = ca91cx42_irq_generate;
ca91cx42_bridge->lm_set = ca91cx42_lm_set;
list_del(pos);
kfree(lm);
}
-#if 0
err_dma:
/* resources are stored in link list */
list_for_each(pos, &(ca91cx42_bridge->dma_resources)) {
list_del(pos);
kfree(dma_ctrlr);
}
-#endif
err_slave:
/* resources are stored in link list */
list_for_each(pos, &(ca91cx42_bridge->slave_resources)) {
*--------------------------------------------------------------------------*/
#if 0
-#define SWIZZLE(X) ( ((X & 0xFF000000) >> 24) | ((X & 0x00FF0000) >> 8) | ((X & 0x0000FF00) << 8) | ((X & 0x000000FF) << 24))
int ca91cx42_master_rmw(vmeRmwCfg_t *vmeRmw)
{
return 0;
}
-int uniSetupDctlReg(vmeDmaPacket_t * vmeDma, int *dctlregreturn)
-{
- unsigned int dctlreg = 0x80;
- struct vmeAttr *vmeAttr;
-
- if (vmeDma->srcBus == VME_DMA_VME) {
- dctlreg = 0;
- vmeAttr = &vmeDma->srcVmeAttr;
- } else {
- dctlreg = 0x80000000;
- vmeAttr = &vmeDma->dstVmeAttr;
- }
-
- switch (vmeAttr->maxDataWidth) {
- case VME_D8:
- break;
- case VME_D16:
- dctlreg |= 0x00400000;
- break;
- case VME_D32:
- dctlreg |= 0x00800000;
- break;
- case VME_D64:
- dctlreg |= 0x00C00000;
- break;
- }
-
- switch (vmeAttr->addrSpace) {
- case VME_A16:
- break;
- case VME_A24:
- dctlreg |= 0x00010000;
- break;
- case VME_A32:
- dctlreg |= 0x00020000;
- break;
- case VME_USER1:
- dctlreg |= 0x00060000;
- break;
- case VME_USER2:
- dctlreg |= 0x00070000;
- break;
-
- case VME_A64: /* not supported in Universe DMA */
- case VME_CRCSR:
- case VME_USER3:
- case VME_USER4:
- return -EINVAL;
- break;
- }
- if (vmeAttr->userAccessType == VME_PROG) {
- dctlreg |= 0x00004000;
- }
- if (vmeAttr->dataAccessType == VME_SUPER) {
- dctlreg |= 0x00001000;
- }
- if (vmeAttr->xferProtocol != VME_SCT) {
- dctlreg |= 0x00000100;
- }
- *dctlregreturn = dctlreg;
- return 0;
-}
-
-unsigned int
-ca91cx42_start_dma(int channel, unsigned int dgcsreg, TDMA_Cmd_Packet *vmeLL)
-{
- unsigned int val;
-
- /* Setup registers as needed for direct or chained. */
- if (dgcsreg & 0x8000000) {
- iowrite32(0, bridge->base + DTBC);
- iowrite32((unsigned int)vmeLL, bridge->base + DCPP);
- } else {
-#if 0
- printk(KERN_ERR "Starting: DGCS = %08x\n", dgcsreg);
- printk(KERN_ERR "Starting: DVA = %08x\n",
- ioread32(&vmeLL->dva));
- printk(KERN_ERR "Starting: DLV = %08x\n",
- ioread32(&vmeLL->dlv));
- printk(KERN_ERR "Starting: DTBC = %08x\n",
- ioread32(&vmeLL->dtbc));
- printk(KERN_ERR "Starting: DCTL = %08x\n",
- ioread32(&vmeLL->dctl));
-#endif
- /* Write registers */
- iowrite32(ioread32(&vmeLL->dva), bridge->base + DVA);
- iowrite32(ioread32(&vmeLL->dlv), bridge->base + DLA);
- iowrite32(ioread32(&vmeLL->dtbc), bridge->base + DTBC);
- iowrite32(ioread32(&vmeLL->dctl), bridge->base + DCTL);
- iowrite32(0, bridge->base + DCPP);
- }
-
- /* Start the operation */
- iowrite32(dgcsreg, bridge->base + DGCS);
- val = get_tbl();
- iowrite32(dgcsreg | 0x8000000F, bridge->base + DGCS);
- return val;
-}
-
-TDMA_Cmd_Packet *ca91cx42_setup_dma(vmeDmaPacket_t * vmeDma)
-{
- vmeDmaPacket_t *vmeCur;
- int maxPerPage;
- int currentLLcount;
- TDMA_Cmd_Packet *startLL;
- TDMA_Cmd_Packet *currentLL;
- TDMA_Cmd_Packet *nextLL;
- unsigned int dctlreg = 0;
-
- maxPerPage = PAGESIZE / sizeof(TDMA_Cmd_Packet) - 1;
- startLL = (TDMA_Cmd_Packet *) __get_free_pages(GFP_KERNEL, 0);
- if (startLL == 0) {
- return startLL;
- }
- /* First allocate pages for descriptors and create linked list */
- vmeCur = vmeDma;
- currentLL = startLL;
- currentLLcount = 0;
- while (vmeCur != 0) {
- if (vmeCur->pNextPacket != 0) {
- currentLL->dcpp = (unsigned int)(currentLL + 1);
- currentLLcount++;
- if (currentLLcount >= maxPerPage) {
- currentLL->dcpp =
- __get_free_pages(GFP_KERNEL, 0);
- currentLLcount = 0;
- }
- currentLL = (TDMA_Cmd_Packet *) currentLL->dcpp;
- } else {
- currentLL->dcpp = (unsigned int)0;
- }
- vmeCur = vmeCur->pNextPacket;
- }
-
- /* Next fill in information for each descriptor */
- vmeCur = vmeDma;
- currentLL = startLL;
- while (vmeCur != 0) {
- if (vmeCur->srcBus == VME_DMA_VME) {
- iowrite32(vmeCur->srcAddr, ¤tLL->dva);
- iowrite32(vmeCur->dstAddr, ¤tLL->dlv);
- } else {
- iowrite32(vmeCur->srcAddr, ¤tLL->dlv);
- iowrite32(vmeCur->dstAddr, ¤tLL->dva);
- }
- uniSetupDctlReg(vmeCur, &dctlreg);
- iowrite32(dctlreg, ¤tLL->dctl);
- iowrite32(vmeCur->byteCount, ¤tLL->dtbc);
-
- currentLL = (TDMA_Cmd_Packet *) currentLL->dcpp;
- vmeCur = vmeCur->pNextPacket;
- }
-
- /* Convert Links to PCI addresses. */
- currentLL = startLL;
- while (currentLL != 0) {
- nextLL = (TDMA_Cmd_Packet *) currentLL->dcpp;
- if (nextLL == 0) {
- iowrite32(1, ¤tLL->dcpp);
- } else {
- iowrite32((unsigned int)virt_to_bus(nextLL),
- ¤tLL->dcpp);
- }
- currentLL = nextLL;
- }
-
- /* Return pointer to descriptors list */
- return startLL;
-}
-
-int ca91cx42_free_dma(TDMA_Cmd_Packet *startLL)
-{
- TDMA_Cmd_Packet *currentLL;
- TDMA_Cmd_Packet *prevLL;
- TDMA_Cmd_Packet *nextLL;
- unsigned int dcppreg;
-
- /* Convert Links to virtual addresses. */
- currentLL = startLL;
- while (currentLL != 0) {
- dcppreg = ioread32(¤tLL->dcpp);
- dcppreg &= ~6;
- if (dcppreg & 1) {
- currentLL->dcpp = 0;
- } else {
- currentLL->dcpp = (unsigned int)bus_to_virt(dcppreg);
- }
- currentLL = (TDMA_Cmd_Packet *) currentLL->dcpp;
- }
-
- /* Free all pages associated with the descriptors. */
- currentLL = startLL;
- prevLL = currentLL;
- while (currentLL != 0) {
- nextLL = (TDMA_Cmd_Packet *) currentLL->dcpp;
- if (currentLL + 1 != nextLL) {
- free_pages((int)prevLL, 0);
- prevLL = nextLL;
- }
- currentLL = nextLL;
- }
-
- /* Return pointer to descriptors list */
- return 0;
-}
-
-int ca91cx42_do_dma(vmeDmaPacket_t *vmeDma)
-{
- unsigned int dgcsreg = 0;
- unsigned int dctlreg = 0;
- int val;
- int channel, x;
- vmeDmaPacket_t *curDma;
- TDMA_Cmd_Packet *dmaLL;
-
- /* Sanity check the VME chain. */
- channel = vmeDma->channel_number;
- if (channel > 0) {
- return -EINVAL;
- }
- curDma = vmeDma;
- while (curDma != 0) {
- if (curDma->byteCount == 0) {
- return -EINVAL;
- }
- if (curDma->byteCount >= 0x1000000) {
- return -EINVAL;
- }
- if ((curDma->srcAddr & 7) != (curDma->dstAddr & 7)) {
- return -EINVAL;
- }
- switch (curDma->srcBus) {
- case VME_DMA_PCI:
- if (curDma->dstBus != VME_DMA_VME) {
- return -EINVAL;
- }
- break;
- case VME_DMA_VME:
- if (curDma->dstBus != VME_DMA_PCI) {
- return -EINVAL;
- }
- break;
- default:
- return -EINVAL;
- break;
- }
- if (uniSetupDctlReg(curDma, &dctlreg) < 0) {
- return -EINVAL;
- }
-
- curDma = curDma->pNextPacket;
- if (curDma == vmeDma) { /* Endless Loop! */
- return -EINVAL;
- }
- }
-
- /* calculate control register */
- if (vmeDma->pNextPacket != 0) {
- dgcsreg = 0x8000000;
- } else {
- dgcsreg = 0;
- }
-
- for (x = 0; x < 8; x++) { /* vme block size */
- if ((256 << x) >= vmeDma->maxVmeBlockSize) {
- break;
- }
- }
- if (x == 8)
- x = 7;
- dgcsreg |= (x << 20);
-
- if (vmeDma->vmeBackOffTimer) {
- for (x = 1; x < 8; x++) { /* vme timer */
- if ((16 << (x - 1)) >= vmeDma->vmeBackOffTimer) {
- break;
- }
- }
- if (x == 8)
- x = 7;
- dgcsreg |= (x << 16);
- }
- /*` Setup the dma chain */
- dmaLL = ca91cx42_setup_dma(vmeDma);
-
- /* Start the DMA */
- if (dgcsreg & 0x8000000) {
- vmeDma->vmeDmaStartTick =
- ca91cx42_start_dma(channel, dgcsreg,
- (TDMA_Cmd_Packet *) virt_to_phys(dmaLL));
- } else {
- vmeDma->vmeDmaStartTick =
- ca91cx42_start_dma(channel, dgcsreg, dmaLL);
- }
-
- wait_event_interruptible(dma_queue,
- ioread32(bridge->base + DGCS) & 0x800);
-
- val = ioread32(bridge->base + DGCS);
- iowrite32(val | 0xF00, bridge->base + DGCS);
-
- vmeDma->vmeDmaStatus = 0;
-
- if (!(val & 0x00000800)) {
- vmeDma->vmeDmaStatus = val & 0x700;
- printk(KERN_ERR "ca91c042: DMA Error in ca91cx42_DMA_irqhandler"
- " DGCS=%08X\n", val);
- val = ioread32(bridge->base + DCPP);
- printk(KERN_ERR "ca91c042: DCPP=%08X\n", val);
- val = ioread32(bridge->base + DCTL);
- printk(KERN_ERR "ca91c042: DCTL=%08X\n", val);
- val = ioread32(bridge->base + DTBC);
- printk(KERN_ERR "ca91c042: DTBC=%08X\n", val);
- val = ioread32(bridge->base + DLA);
- printk(KERN_ERR "ca91c042: DLA=%08X\n", val);
- val = ioread32(bridge->base + DVA);
- printk(KERN_ERR "ca91c042: DVA=%08X\n", val);
-
- }
- /* Free the dma chain */
- ca91cx42_free_dma(dmaLL);
-
- return 0;
-}
-
-
-
-
-
int ca91cx42_set_arbiter(vmeArbiterCfg_t *vmeArb)
{
int temp_ctl = 0;
projects / platform / kernel / linux-starfive.git / commitdiff