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14  *      - Redistributions of source code must retain the above
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18  *      - Redistributions in binary form must reproduce the above
19  *        copyright notice, this list of conditions and the following
23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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63 	 * Reset the chip.  This is somewhat ugly because we have to  in mthca_reset()
64 	 * save off the PCI header before reset and then restore it  in mthca_reset()
68 	 * To make matters worse, for Tavor (PCI-X HCA) we have to  in mthca_reset()
73 	if (!(mdev->mthca_flags & MTHCA_FLAG_PCIE)) {  in mthca_reset()
74 		/* Look for the bridge -- its device ID will be 2 more  in mthca_reset()
77 		while ((bridge = pci_get_device(mdev->pdev->vendor,  in mthca_reset()
78 						mdev->pdev->device + 2,  in mthca_reset()
80 			if (bridge->hdr_type    == PCI_HEADER_TYPE_BRIDGE &&  in mthca_reset()
81 			    bridge->subordinate == mdev->pdev->bus) {  in mthca_reset()
90 			 * Didn't find a bridge for a Tavor device --  in mthca_reset()
91 			 * assume we're in no-bridge mode and hope for  in mthca_reset()
95 				  pci_name(mdev->pdev));  in mthca_reset()
98 		mthca_warn(mdev, "Reset on PCI-X is not supported.\n");  in mthca_reset()
99 		goto out;  in mthca_reset()
107 		err = -ENOMEM;  in mthca_reset()
110 		goto out;  in mthca_reset()
116 		if (pci_read_config_dword(mdev->pdev, i * 4, hca_header + i)) {  in mthca_reset()
117 			err = -ENODEV;  in mthca_reset()
120 			goto out;  in mthca_reset()
124 	hca_pcix_cap = pci_find_capability(mdev->pdev, PCI_CAP_ID_PCIX);  in mthca_reset()
125 	hca_pcie_cap = pci_find_capability(mdev->pdev, PCI_CAP_ID_EXP);  in mthca_reset()
131 			err = -ENOMEM;  in mthca_reset()
134 			goto out;  in mthca_reset()
141 				err = -ENODEV;  in mthca_reset()
144 				goto out;  in mthca_reset()
149 				err = -ENODEV;  in mthca_reset()
151 					  "PCI-X capability, aborting.\n");  in mthca_reset()
152 				goto out;  in mthca_reset()
157 	/* actually hit reset */  in mthca_reset()
159 		void __iomem *reset = ioremap(pci_resource_start(mdev->pdev, 0) +  in mthca_reset()  local
162 		if (!reset) {  in mthca_reset()
163 			err = -ENOMEM;  in mthca_reset()
164 			mthca_err(mdev, "Couldn't map HCA reset register, "  in mthca_reset()
166 			goto out;  in mthca_reset()
169 		writel(MTHCA_RESET_VALUE, reset);  in mthca_reset()
170 		iounmap(reset);  in mthca_reset()
182 			if (pci_read_config_dword(bridge ? bridge : mdev->pdev, 0, &v)) {  in mthca_reset()
183 				err = -ENODEV;  in mthca_reset()
184 				mthca_err(mdev, "Couldn't access HCA after reset, "  in mthca_reset()
186 				goto out;  in mthca_reset()
195 		err = -ENODEV;  in mthca_reset()
196 		mthca_err(mdev, "PCI device did not come back after reset, "  in mthca_reset()
198 		goto out;  in mthca_reset()
207 			err = -ENODEV;  in mthca_reset()
210 			goto out;  in mthca_reset()
214 			err = -ENODEV;  in mthca_reset()
217 			goto out;  in mthca_reset()
228 				err = -ENODEV;  in mthca_reset()
231 				goto out;  in mthca_reset()
237 			err = -ENODEV;  in mthca_reset()
240 			goto out;  in mthca_reset()
246 		if (pci_write_config_dword(mdev->pdev, hca_pcix_cap,  in mthca_reset()
248 			err = -ENODEV;  in mthca_reset()
249 			mthca_err(mdev, "Couldn't restore HCA PCI-X "  in mthca_reset()
251 			goto out;  in mthca_reset()
257 		if (pci_write_config_word(mdev->pdev, hca_pcie_cap + PCI_EXP_DEVCTL,  in mthca_reset()
259 			err = -ENODEV;  in mthca_reset()
262 			goto out;  in mthca_reset()
265 		if (pci_write_config_word(mdev->pdev, hca_pcie_cap + PCI_EXP_LNKCTL,  in mthca_reset()
267 			err = -ENODEV;  in mthca_reset()
270 			goto out;  in mthca_reset()
278 		if (pci_write_config_dword(mdev->pdev, i * 4, hca_header[i])) {  in mthca_reset()
279 			err = -ENODEV;  in mthca_reset()
282 			goto out;  in mthca_reset()
286 	if (pci_write_config_dword(mdev->pdev, PCI_COMMAND,  in mthca_reset()
288 		err = -ENODEV;  in mthca_reset()
291 		goto out;  in mthca_reset()
294 out:  in mthca_reset()